CN112816328A - Device and method for hydraulic explosion detection of annular fuel assembly fuel rod - Google Patents
Device and method for hydraulic explosion detection of annular fuel assembly fuel rod Download PDFInfo
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- CN112816328A CN112816328A CN202011355413.3A CN202011355413A CN112816328A CN 112816328 A CN112816328 A CN 112816328A CN 202011355413 A CN202011355413 A CN 202011355413A CN 112816328 A CN112816328 A CN 112816328A
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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Abstract
The invention belongs to the technical field of nuclear fuel element detection, and particularly relates to a device and a method for hydraulic explosion detection of an annular fuel assembly fuel rod. The device comprises a joint, a hoop and a compression nut, and by using the device and the method, the conical surface of the joint is matched with the conical surface of the hoop, and the flared pipe is tightly connected with the joint and the hoop during the period of using the compression nut, so that the sealing is good; the clamp can be repeatedly used after being taken down, and the detection cost is low; the process is simple and easy to operate.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel element detection, and particularly relates to a device and a method for hydraulic explosion detection of an annular fuel assembly fuel rod.
Background
The hydraulic test equipment uses gas as a power source, a pneumatic pump as a pressure source, and the pressure of output liquid is proportional to the pressure of driving gas. The corresponding output liquid pressure can be obtained by adjusting the driving air pressure. When the driving air pressure is balanced with the output liquid pressure, the air pump stops pressurizing, and the output liquid pressure is stabilized on the pre-pressurizing pressure. By controlling the air intake, the liquid flow can be controlled, thereby controlling the pressure rise speed. The ultimate pressure at which the sample ruptures is tested at the end of the test until the sample ruptures.
The detection flow of the hydraulic blasting test comprises the following steps:
1) the cladding tube was cut into approximately 200mm long samples with a lathe and a sealed end plug was welded at one end.
2) And (4) connecting the nozzle of the fuel rod with the blasting equipment in a sealing way.
3) And (4) carrying out a blasting test, unloading the sample after the sample is blasted, and reserving the sample for measurement.
The fuel rod burst test specimen is tubular as shown in fig. 1. The outer diameter of the sealing plug is phi 15.27mm, the inner diameter of the sealing plug is phi 8.2mm, a sealing end plug is welded at one end of the sealing plug, and the other end of the sealing plug is free to open.
The explosion test is a destructive test of ultimate explosion pressure of the annular fuel element fuel rod, the test pressure can reach dozens of megapascals, the sealing connection of the nozzle of the fuel rod and equipment is realized, and the test cost is considered.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a device and a method for detecting hydraulic bursting of an annular fuel assembly fuel rod, so as to establish a method for detecting hydraulic bursting of an annular fuel assembly fuel rod.
The technical scheme of the invention is as follows:
a hydraulic explosion detection device for an annular fuel assembly fuel rod comprises a joint, a hoop and a compression nut, wherein a central hole A is formed in the middle of the joint in the axial direction, and continuous reducing is arranged at the connecting position of a clamping nut and an external thread in the central hole A and is used for blasting media to pass through; the lower end of the joint is provided with an external thread which is matched with the interface thread of the hydraulic blasting testing machine;
the upper part of the external thread is provided with a clamping nut which is used for clamping when the joint and the equipment and the joint and the compression nut are connected and installed;
the upper end of the joint is a smooth conical surface and is used for connecting the guide pipe and realizing the sealing of the contact surface of the joint and the guide pipe, and a pressing thread is arranged below the smooth conical surface and is used for installing and pressing a nut;
the whole structure of the hoop is cylindrical with steps outside;
a central hole B is formed in the clamp, and continuous reducing is arranged in the central hole B at the position of the compression part and used for blasting media to pass through; for passing through the guide tube; the bottom of the clamp is a pressing part, and the diameter of the pressing part is larger than the inner diameter of a pressing end hole of the pressing nut and is used for pressing; the upper part of the clamp is a positioning part, and the end hole is compressed through a compression nut and is used for connecting and positioning; the bottom inside the hoop is provided with a hoop conical surface structure, the hoop is matched with the conical surface of the joint and used for compressing the flaring part of the sample guide tube and realizing the sealing connection of the guide tube and the blasting test equipment;
the interior of the compression nut is provided with internal threads for connecting with the joint, and the exterior of the compression nut is provided with an outer hexagonal nut structure for clamping when the compression nut is connected and installed; the upper end of the compression nut is an open part for flaring the guide pipe;
the lowest end of the compression nut is provided with an opening for the passing of the positioning part of the hoop and compressing the compression part of the hoop.
The diameter of the central hole A1 is phi 4-phi 8mm, the diameter of the upper central hole A1 is phi 8mm, and the diameter of the lower central hole A1 is phi 4 mm.
The external thread at the lower end of the joint has the thread length of M13 multiplied by 1.35 and is 12-13mm.
The clamping nut is 9-10mm in length and 40mm in transverse maximum size.
The pressing thread has the size of M30 multiplied by 1.5 and the length of 9-10 mm.
The upper end of the joint is a smooth conical surface with an included angle of 60 degrees, the diameter of the small conical surface at the top is phi 11-phi 12mm, and the diameter of the conical bottom is phi 28 mm.
The diameter of the upper part of the hoop is phi 16.8-phi 17.2mm, the diameter of the upper central hole B is phi 16.8mm, the diameter of the lower central hole B is phi 17.2, and the hoop is made of 304 stainless steel;
the bottom of the clamp is a compression part, the outer diameter is phi 30mm, and the height is 7-8 mm;
the upper part of the hoop is a positioning part, the outer diameter is phi 26mm, and the height is 11-12 mm;
the bottom inside the clamp is provided with a ring conical surface structure, the included angle of the conical surface is 60 degrees, and the height is 2 mm.
The joint is made of 304 stainless steel, the overall length is 50-54mm, and the transverse maximum dimension is 40 mm;
9. the apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the compression nut is 33-34mm in height, 42mm in transverse maximum size and made of 304 stainless steel; the interior of the compression nut is provided with internal threads 10, and the size of the compression nut is M30 multiplied by 1.5; the upper end of the compression nut is an open part, the transverse diameter is phi 30mm, and the height is 1 mm;
the lowest end of the compression nut is provided with an opening with the diameter phi of 26.5mm and the height of the opening of 2-3 mm; the clamping device is used for passing through the positioning part of the clamp and pressing the pressing part of the clamp.
A method for detecting hydraulic blasting of an annular fuel assembly fuel rod comprises the following steps that firstly, a joint is connected to a joint of a blasting tester and screwed down, and a copper gasket is placed in the middle of the joint;
secondly, enabling the open end of the sample to penetrate through the opening end of the compression nut, then penetrating through the clamp from the thin end, and performing flaring treatment on the open end of the sample guide pipe by using a flaring device, wherein the height is 3-5 mm;
thirdly, pressing the flaring part of the guide pipe close to the conical surface of the joint, connecting the compression nut with the joint and fastening;
starting a blasting tester, and finishing a blasting test according to a set program;
and step five, after the test is finished, unscrewing and taking down the compression nut on the guide pipe, sawing off the pipe by adhering to the thin end of the hoop, and finally taking down the hoop and the compression nut.
The invention has the beneficial effects that:
by the invention, the following effects are achieved in the hydraulic blasting detection project of the annular fuel assembly guide pipe:
1) the conical surface of the joint is matched with the conical surface of the hoop, and the flared pipe is tightly connected with the joint and the hoop during the pressing of the compression nut, so that the sealing is good;
2) the clamp can be repeatedly used after being taken down, and the detection cost is low;
3) the process is simple and easy to operate.
Drawings
FIG. 1 is a sample of an annular fuel assembly fuel rod explosion;
FIG. 2 is a schematic cross-sectional view of a joint of the present invention;
FIG. 3 is a top view of the joint of the present invention;
FIG. 4 is a schematic view of a clamp of the present invention;
FIG. 5 is a schematic view of a cross-sectional structure of the compression nut of the present invention
FIG. 6 is a top view of the compression nut of the present invention;
fig. 7 is an assembly view of the present invention.
1. A central hole A; 2. an external thread; 3. clamping the nut; 4. a smooth conical surface; 5. pressing the threads; 6. a central hole B; 7. a compression site; 8. positioning the part; 9. a ring conical surface structure; 10. an internal thread; 11. an outer hexagonal nut structure; 12. an open part; 13. and (6) opening holes.
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.
A hydraulic explosion detection device for an annular fuel assembly fuel rod comprises a joint, a hoop and a compression nut;
the joint is made of 304 stainless steel as shown in figures 2 and 3, the overall length is 50-54mm, and the transverse maximum dimension is 40 mm;
a central hole A1 with the diameter of phi 4-phi 8mm is formed in the middle in the axial direction, the diameter of an upper central hole A1 is phi 8mm, the diameter of a lower central hole A1 is phi 4mm, and a central hole A1 is provided with continuous reducing at the connecting position of a clamping nut 3 and an external thread 2 and is used for the passage of a blasting medium; the lower end of the joint is provided with an external thread (2), the thread is M13 multiplied by 1.35, the length of the thread is 12-13mm, and the thread is used for being matched with the interface thread of the hydraulic bursting tester;
the upper part of the external thread (2) is provided with a clamping nut (3), the length of the clamping nut is 9-10mm, the transverse maximum size of the clamping nut is 40mm, and the clamping nut is used for clamping when a connector and equipment are connected and installed;
the upper end of the joint is a smooth conical surface 4 which is used for connecting the guide pipe and realizing the sealing of the contact surface of the joint and the guide pipe, the included angle of the conical surface is 60 degrees, the diameter of the small conical surface at the top is phi 11-phi 12mm, and the diameter of the conical bottom is phi 28 mm. And a pressing thread 5 is arranged below the smooth conical surface 4, has the size of M30 multiplied by 1.5, has the length of 9-10mm and is used for installing and pressing the nut.
The clamp is made of 304 stainless steel, and the whole structure is cylindrical with steps outside, as shown in fig. 4.
The inside of the hoop is a central hole B6, the diameter of the upper part is phi 16.8-phi 17.2mm, the diameter of the upper central hole B6 is phi 16.8mm, the diameter of the lower central hole B6 is phi 17.2, and a central hole B6 is provided with continuous reducing at a pressing part 7 for the passing of a blasting medium; for passing through the guide tube; the bottom of the clamp is a compression part 7, the outer diameter is phi 30mm, the height is 7-8mm, and the diameter is larger than the inner diameter of a compression end hole of the compression nut and is used for compression; the upper part of the hoop is a positioning part (8), the outer diameter is phi 26mm, the height is 11-12mm, and an end hole is tightly pressed through a compression nut for connection and positioning; the bottom inside the clamp is provided with a ring conical surface structure 9, the included angle of the conical surface is 60 degrees, and the height is 2 mm. The clamp is matched with the conical surface of the joint and used for pressing the flaring part of the sample guide pipe and realizing the sealing connection between the guide pipe and the blasting test equipment.
As shown in figures 5 and 6, the compression nut has the height of 33-34mm and the maximum transverse dimension of 42mm, and is made of 304 stainless steel.
The interior of the compression nut is provided with internal threads 10, the size of the compression nut is M30 multiplied by 1.5, the compression nut is used for being connected with a connector, and the exterior of the compression nut is provided with an outer hexagonal nut structure 11 used for clamping the compression nut during connection and installation; the upper end of the gland nut is provided with an open part 12, the transverse diameter of the gland nut is phi 30mm, the height of the gland nut is 1mm, and the gland nut is used for flaring the guide pipe.
The lowest end of the compression nut is provided with an opening 13, the diameter is phi 26.5mm, and the height of the opening is 2-3 mm; for the passage of the positioning portion 8 of the clamp and for the pressing of the pressing portion 7 of the clamp.
A method for detecting hydraulic explosion of an annular fuel assembly fuel rod comprises the following steps: connecting a joint to a joint of a bursting tester and screwing the joint, and placing a copper gasket in the middle;
secondly, enabling the open end of the sample to penetrate through the opening end of the compression nut, then penetrating through the clamp from the thin end, and performing flaring treatment on the open end of the sample guide pipe by using a flaring device, wherein the height is 3-5 mm;
thirdly, pressing the flaring part of the guide pipe close to the conical surface of the joint, connecting the compression nut with the joint and fastening;
starting a blasting tester, and finishing a blasting test according to a set program;
and step five, after the test is finished, unscrewing and taking down the compression nut on the guide pipe, sawing off the pipe by adhering to the thin end of the hoop, and finally taking down the hoop and the compression nut.
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 a device that annular fuel assembly fuel rod hydraulic pressure explodes and detects, includes joint, clamp and gland nut, its characterized in that:
a central hole A is formed in the middle of the joint in the axial direction, and continuous reducing is arranged at the connecting position of the clamping nut and the external thread of the central hole A and is used for blasting media to pass through; the lower end of the joint is provided with an external thread which is matched with the interface thread of the hydraulic blasting testing machine;
the upper part of the external thread is provided with a clamping nut which is used for clamping when the joint and the equipment and the joint and the compression nut are connected and installed;
the upper end of the joint is a smooth conical surface and is used for connecting the guide pipe and realizing the sealing of the contact surface of the joint and the guide pipe, and a pressing thread is arranged below the smooth conical surface and is used for installing and pressing a nut;
the whole structure of the hoop is cylindrical with steps outside;
a central hole B is formed in the clamp, and continuous reducing is arranged in the central hole B at the position of the compression part and used for blasting media to pass through; for passing through the guide tube; the bottom of the clamp is a pressing part, and the diameter of the pressing part is larger than the inner diameter of a pressing end hole of the pressing nut and is used for pressing; the upper part of the clamp is a positioning part, and the end hole is compressed through a compression nut and is used for connecting and positioning; the bottom inside the hoop is provided with a hoop conical surface structure, the hoop is matched with the conical surface of the joint and used for compressing the flaring part of the sample guide tube and realizing the sealing connection of the guide tube and the blasting test equipment;
the interior of the compression nut is provided with internal threads for connecting with the joint, and the exterior of the compression nut is provided with an outer hexagonal nut structure for clamping when the compression nut is connected and installed; the upper end of the compression nut is an open part for flaring the guide pipe;
the lowest end of the compression nut is provided with an opening for the passing of the positioning part of the hoop and compressing the compression part of the hoop.
2. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the diameter of the central hole A1 is phi 4-phi 8mm, the diameter of the upper central hole A1 is phi 8mm, and the diameter of the lower central hole A1 is phi 4 mm.
3. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the external thread at the lower end of the joint has the thread length of M13 multiplied by 1.35 and is 12-13mm.
4. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the clamping nut is 9-10mm in length and 40mm in transverse maximum size.
5. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the pressing thread has the size of M30 multiplied by 1.5 and the length of 9-10 mm.
6. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the upper end of the joint is a smooth conical surface with an included angle of 60 degrees, the diameter of the small conical surface at the top is phi 11-phi 12mm, and the diameter of the conical bottom is phi 28 mm.
7. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the diameter of the upper part of the hoop is phi 16.8-phi 17.2mm, the diameter of the upper central hole B is phi 16.8mm, the diameter of the lower central hole B is phi 17.2, and the hoop is made of 304 stainless steel;
the bottom of the clamp is a compression part, the outer diameter is phi 30mm, and the height is 7-8 mm;
the upper part of the hoop is a positioning part, the outer diameter is phi 26mm, and the height is 11-12 mm;
the bottom inside the clamp is provided with a ring conical surface structure, the included angle of the conical surface is 60 degrees, and the height is 2 mm.
8. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the joint is made of 304 stainless steel, the overall length is 50-54mm, and the maximum transverse dimension is 40 mm.
9. The apparatus for detecting hydraulic bursting of an annular fuel assembly rod of claim 1 wherein: the compression nut is 33-34mm in height, 42mm in transverse maximum size and made of 304 stainless steel; the interior of the compression nut is provided with internal threads 10, and the size of the compression nut is M30 multiplied by 1.5; the upper end of the compression nut is an open part, the transverse diameter is phi 30mm, and the height is 1 mm;
the lowest end of the compression nut is provided with an opening with the diameter phi of 26.5mm and the height of the opening of 2-3 mm; the clamping device is used for passing through the positioning part of the clamp and pressing the pressing part of the clamp.
10. A method for detecting hydraulic blasting of an annular fuel assembly fuel rod is characterized by comprising the following steps: connecting a joint to a joint of a bursting tester and screwing the joint, and placing a copper gasket in the middle;
secondly, enabling the open end of the sample to penetrate through the opening end of the compression nut, then penetrating through the clamp from the thin end, and performing flaring treatment on the open end of the sample guide pipe by using a flaring device, wherein the height is 3-5 mm;
thirdly, pressing the flaring part of the guide pipe close to the conical surface of the joint, connecting the compression nut with the joint and fastening;
starting a blasting tester, and finishing a blasting test according to a set program;
and step five, after the test is finished, unscrewing and taking down the compression nut on the guide pipe, sawing off the pipe by adhering to the thin end of the hoop, and finally taking down the hoop and the compression nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355413.3A CN112816328A (en) | 2020-11-27 | 2020-11-27 | Device and method for hydraulic explosion detection of annular fuel assembly fuel rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355413.3A CN112816328A (en) | 2020-11-27 | 2020-11-27 | Device and method for hydraulic explosion detection of annular fuel assembly fuel rod |
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| CN112816328A true CN112816328A (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011355413.3A Pending CN112816328A (en) | 2020-11-27 | 2020-11-27 | Device and method for hydraulic explosion detection of annular fuel assembly fuel rod |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202075186U (en) * | 2011-05-13 | 2011-12-14 | 常州腾龙汽车零部件股份有限公司 | Test device for quick bursting of aluminum tube |
| CN206130355U (en) * | 2016-10-13 | 2017-04-26 | 何志林 | Aviation fluid pipeline connects |
| CN107389467A (en) * | 2017-06-23 | 2017-11-24 | 中国核电工程有限公司 | A kind of device for simulating the experiment of spentnuclear fuel involucrum high-temperature mechanical property |
| CN207095984U (en) * | 2017-07-24 | 2018-03-13 | 中核北方核燃料元件有限公司 | A kind of carborundum cladding tubes explosion bulge test detection means |
| CN108051321A (en) * | 2017-12-20 | 2018-05-18 | 广东核电合营有限公司 | A kind of cladding tubes internal pressure explosion bulge test device and its test method |
| CN111350890A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for hydraulic blasting detection of annular fuel assembly guide pipe |
| CN111351714A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for hydraulic blasting detection of annular fuel assembly buffer tube |
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2020
- 2020-11-27 CN CN202011355413.3A patent/CN112816328A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202075186U (en) * | 2011-05-13 | 2011-12-14 | 常州腾龙汽车零部件股份有限公司 | Test device for quick bursting of aluminum tube |
| CN206130355U (en) * | 2016-10-13 | 2017-04-26 | 何志林 | Aviation fluid pipeline connects |
| CN107389467A (en) * | 2017-06-23 | 2017-11-24 | 中国核电工程有限公司 | A kind of device for simulating the experiment of spentnuclear fuel involucrum high-temperature mechanical property |
| CN207095984U (en) * | 2017-07-24 | 2018-03-13 | 中核北方核燃料元件有限公司 | A kind of carborundum cladding tubes explosion bulge test detection means |
| CN108051321A (en) * | 2017-12-20 | 2018-05-18 | 广东核电合营有限公司 | A kind of cladding tubes internal pressure explosion bulge test device and its test method |
| CN111350890A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for hydraulic blasting detection of annular fuel assembly guide pipe |
| CN111351714A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for hydraulic blasting detection of annular fuel assembly buffer tube |
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