CN111947850A - Double-layer-pipe helium leakage detection device with interlayer and method - Google Patents
Double-layer-pipe helium leakage detection device with interlayer and method Download PDFInfo
- Publication number
- CN111947850A CN111947850A CN202010979928.4A CN202010979928A CN111947850A CN 111947850 A CN111947850 A CN 111947850A CN 202010979928 A CN202010979928 A CN 202010979928A CN 111947850 A CN111947850 A CN 111947850A
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- helium
- double
- pipe
- tube
- leak detection
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- 239000001307 helium Substances 0.000 title claims abstract description 75
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 75
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 239000011229 interlayer Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 64
- 230000000903 blocking effect Effects 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 22
- 239000004033 plastic Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 2
- 239000010410 layer Substances 0.000 abstract description 26
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 4
- 229910052722 tritium Inorganic materials 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/222—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for tubes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a double-layer-tube helium leak detection device with an interlayer and a method thereof.A double-layer-tube helium leak detection tool is characterized in that an inner tube is sleeved in an outer tube, the inner tube is hermetically connected with a first end of a sealing flange box through a first sealing element, the outer tube is connected with a second end of the sealing flange box through a second sealing element, and the diameter of the first end is smaller than that of the second end; one end of the inner pipe is blocked by a first blocking plate, and the other end of the inner pipe is blocked by a second blocking plate; a helium gas access hole is formed in the first blocking plate; the outer pipe is provided with outside and aerifys the cover, aerifys to cover and is provided with the helium and leads to the hole, simple structure, easy dismounting and can realize double-deck intraductal and intermediate layer gas tightness test, and the leak hunting precision is high, detection efficiency is high and with low costs, can realize whole test simultaneously, satisfies the double-deck pipe leak hunting requirement of taking the intermediate layer.
Description
Technical Field
The invention relates to the technical field of helium tightness detection, in particular to a double-layer tube helium leakage detection device with an interlayer and a method, which are mainly used for helium leakage detection of a fusion reactor tritium production cladding double-layer pipeline.
Background
A double-layer pipeline of a helium-cooled solid state tritium production cladding (HCCB TBS) of an International Thermonuclear Experimental Reactor (ITER) is connected with a tritium production cladding (TBM) body module and a shielding block (Shield), and penetrates through the whole shielding block to perform the functions of tritium extraction, helium cooling circulation and the like. The double-layer pipe is of a pi-shaped structure, the length of the double-layer pipe is 1839mm, the diameter phi of the outer pipe is 114.3mm, the outer wall of the outer pipe needs to bear external pressure of 4MPa, the interlayer of the double-layer pipe is a vacuum boundary, the diameter phi of the inner pipe is 73mm, and the inner wall of the double-layer pipe bears high-temperature internal pressure of 8 MPa. And (4) carrying out air tightness detection on the double-layer pipe according to design requirements. The existing air tightness detection tool is generally used for a single-layer tube structure, is limited in detection structure, is difficult to realize air tightness tests of an inner layer and an interlayer of a double-layer tube, and is complex in assembly, low in efficiency and high in cost.
Disclosure of Invention
The technical problems to be solved by the invention are that the existing air tightness detection tool is generally used for a single-layer tube structure, the detection structure is limited, the air tightness test of an inner layer and an interlayer of a double-layer tube is not easy to realize, the assembly is complex, the efficiency is low, and the cost is high. Therefore, the double-layer tube helium leakage detection device with the interlayer and the method provided by the invention have the advantages that the structure is simple, the airtightness test of the inner tube and the interlayer of the double-layer tube is easy to realize, the disassembly and the assembly are convenient, the structure is not limited, the efficiency is high, the cost is low, the vacuum requirement of the airtightness test of the helium gas of the double-layer tube is met, and the integral test of the double-layer tube is realized.
The invention is realized by the following technical scheme:
in order to solve the technical problems, the invention is realized by the following technical scheme:
a double-layer pipe helium leak detection device with an interlayer comprises an inner pipe, an outer pipe and a helium leak detection tool, wherein the helium leak detection tool comprises a first sealing element, a second sealing element, a first blocking plate, a second blocking plate, an inflatable cover and a sealing flange box;
the inner pipe is sleeved in the outer pipe, the inner pipe is connected with a first end of the sealing flange box in a sealing mode through a first sealing element, the outer pipe is connected with a second end of the sealing flange box through a second sealing element, and the diameter of the first end is smaller than that of the second end; one end of the inner pipe is blocked by a first blocking plate, and the other end of the inner pipe is blocked by a second blocking plate; a helium gas access hole is formed in the first blocking plate; an inflation cover is arranged outside the outer pipe, and a helium gas access hole is formed in the inflation cover.
Further, the first sealing element comprises a first cover plate and a first O-shaped sealing ring;
the first cover plate is provided with a boss, the sealing flange box is provided with a groove matched with the boss, and the boss and the groove are sealed through the end face of the first O-shaped sealing ring on the outer wall of the inner pipe.
Further, the first cover plate is connected with the first end of the sealing flange box through a bolt.
Further, the second sealing element comprises a second cover plate and a second O-shaped sealing ring;
the second cover plate is provided with a boss, the sealing flange box is provided with a groove matched with the boss, and the boss and the groove are sealed on the outer wall of the outer pipe through the end face of a second O-shaped sealing ring.
Further, the second cover plate is connected with the second end of the sealing flange box through a bolt.
Further, the first and second O-rings are made of rubber.
Further, the first and second closure plates are made of plastic.
Further, the inflatable cover is made of a plastic film.
Furthermore, a connecting pipe port is arranged on the sealing flange box and used for connecting a helium mass spectrometer.
A helium leak detection method based on the double-layer-tube helium leak detection device with the interlayer comprises the following steps:
introducing helium into the inner tube through a helium gas inlet hole formed in the first blocking plate, and detecting the air tightness of the inner tube through a helium mass spectrometer connected to the sealed flange box;
introducing helium into the outer pipe through a helium gas inlet hole formed in the gas-filled cover; and the air tightness of the outer tube is detected by a helium mass spectrometer connected to the sealed flange box.
The double-layer pipe helium leak detection device with the interlayer and the method thereof provided by the invention have the advantages that the inner pipe is sleeved in the outer pipe, the inner pipe is connected with the first end of the sealing flange box in a sealing manner through the first sealing element, the outer pipe is connected with the second end of the sealing flange box through the second sealing element, and the diameter of the first end is smaller than that of the second end; one end of the inner pipe is blocked by a first blocking plate, and the other end of the inner pipe is blocked by a second blocking plate; a helium gas access hole is formed in the first blocking plate; the outer pipe is provided with outside and aerifys the cover, aerifys to cover and is provided with the helium and leads to the hole, simple structure, easy dismounting and can realize double-deck intraductal and intermediate layer gas tightness test, and the leak hunting precision is high, detection efficiency is high and with low costs, can realize whole test simultaneously, satisfies the double-deck pipe leak hunting requirement of taking the intermediate layer.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a double-layer-tube helium leak detection device with an interlayer.
Fig. 2 is a partial structural schematic diagram of a double-layer-tube helium leak detection device with an interlayer.
Fig. 3 is another partial schematic diagram of the helium leak detection device with a double-layer pipe and an interlayer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The utility model provides a take interbedded double-layer pipe helium leak hunting device, includes inner tube, outer tube and helium leak hunting frock, helium leak hunting frock includes first sealing member, second sealing member, first closure plate 4, second closure plate 9, aerifys cover 8 and sealed flange case 2.
The inner pipe is sleeved in the outer pipe, the inner pipe is in sealing connection with the first end of the sealing flange box 2 through a first sealing piece, the outer pipe is connected with the second end of the sealing flange box 2 through a second sealing piece, and the diameter of the first end is smaller than that of the second end. One end of the inner pipe is sealed by a first plugging plate 4, and the other end of the inner pipe is sealed by a second plugging plate 9. The first blocking plate 4 is provided with a helium access hole. An inflation cover 8 is arranged outside the outer pipe, and a helium gas access hole is formed in the inflation cover 8.
Further, the first sealing element comprises a first cover plate 6 and a first O-shaped sealing ring 5.
The first cover plate 6 is provided with a boss, the sealing flange box 2 is provided with a groove matched with the boss, and the boss and the groove are sealed on the outer wall of the inner pipe through the end face of the first O-shaped sealing ring 5.
Further, the first cover plate 6 is connected with the first end of the sealed flange box 2 through bolts 3.
Further, the second sealing element comprises a second cover plate 7 and a second O-shaped sealing ring 1.
The second cover plate 7 is provided with a boss, the sealing flange box 2 is provided with a groove matched with the boss, and the boss and the groove are sealed on the outer wall of the outer pipe through the end face of the second O-shaped sealing ring 1.
Further, the second cover plate 7 is connected to the second end of the sealed flange box 2 by bolts 3.
Further, the first O-ring 5 and the second O-ring 1 are made of rubber.
Further, the first and second closure plates 4, 9 are made of plastic.
Further, the inflatable hood 8 is made of a plastic film.
Furthermore, a connecting pipe port is arranged on the sealing flange box 2 and used for connecting a helium mass spectrometer.
Specifically, the inner pipe is connected with a first end of a sealing flange box 2 in a sealing mode through a first sealing element, the outer pipe is connected with a second end of the sealing flange box 2 through a second sealing element, then one end of the inner pipe is blocked through a first blocking plate 4, a helium gas access hole is formed in the first blocking plate 4, and the other end of the inner pipe is blocked through a second blocking plate 9; then set up outside the outer tube and aerify cover 8 to aerify and be provided with the helium on cover 8 and pass through the hole, when letting in the hole and letting in the helium to the inner tube through the helium that sets up on first closure plate 4, and let in the helium to the outer tube through the helium that sets up on aerifing cover 8, detect through the helium mass spectrometer of connecting on the sealed flange case 2 and carry out the gas tightness to the intermediate layer between inner tube and the outer tube and detect, simple structure, easy dismounting and leak hunting precision are high, detection efficiency is high, low cost, still can realize whole test simultaneously, satisfy the double-deck pipe leak hunting requirement of taking the intermediate layer.
Example 2
The difference between this embodiment and embodiment 1 is that a helium leak detection method based on the above double-layer-tube helium leak detection device with an interlayer is provided, and includes:
and helium is introduced into the inner pipe through a helium gas inlet hole formed in the first blocking plate 4, and the air tightness of the inner pipe is detected through a helium mass spectrometer connected to the sealing flange box 2.
Helium is introduced into the outer pipe through a helium gas inlet hole formed in the gas-filled cover 8. And the gas tightness of the outer tube is detected by a helium mass spectrometer connected to the sealed flange box 2.
In particular, the above embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The double-layer-pipe helium leak detection device with the interlayer is characterized by comprising an inner pipe, an outer pipe and a helium leak detection tool, wherein the helium leak detection tool comprises a first sealing element, a second sealing element, a first blocking plate (4), a second blocking plate (9), an inflatable cover (8) and a sealing flange box (2);
the inner pipe is sleeved in the outer pipe, the inner pipe is connected with a first end of the sealing flange box (2) in a sealing mode through a first sealing element, the outer pipe is connected with a second end of the sealing flange box (2) through a second sealing element, and the diameter of the first end is smaller than that of the second end; one end of the inner pipe is blocked by a first blocking plate (4), and the other end of the inner pipe is blocked by a second blocking plate (9); a helium access hole is formed in the first blocking plate (4); an inflation cover (8) is arranged outside the outer pipe, and a helium gas access hole is formed in the inflation cover (8).
2. The jacketed dual tube helium leak detection apparatus of claim 1 wherein the first seal comprises a first cover plate (6) and a first O-ring seal (5);
the first cover plate (6) is provided with a boss, the sealing flange box (2) is provided with a groove matched with the boss, and the boss and the groove are sealed through the end face of the first O-shaped sealing ring (5) to form the outer wall of the inner pipe.
3. The double-pipe helium leak detection device with interlayer of claim 2, wherein the first cover plate (6) is connected with the first end of the sealed flange box (2) through a bolt (3).
4. The jacketed dual tube helium leak detection apparatus of claim 1 wherein the second seal comprises a second cover plate (7) and a second O-ring seal (1);
the second cover plate (7) is provided with a boss, the sealing flange box (2) is provided with a groove matched with the boss, and the boss and the groove are sealed on the outer wall of the outer pipe through the end face of the second O-shaped sealing ring (1).
5. The double-pipe helium leak detection device with interlayer of claim 4, wherein the second cover plate (7) is connected with the second end of the sealed flange box (2) through a bolt (3).
6. The double-layered pipe helium leak detection apparatus with interlayer of claim 2 or 4, wherein the first O-ring (5) and the second O-ring (1) are made of rubber.
7. The double-tube helium leak detection device with interlayer of claim 1, wherein the first blocking plate (4) and the second blocking plate (9) are made of plastic.
8. The double-tube helium leak detector with interlayer of claim 1, wherein the gas-filled enclosure (8) is made of plastic film.
9. The double-layer-tube helium leak detection device with the interlayer as recited in claim 1, wherein the sealing flange box (2) is provided with a nozzle for connecting a helium mass spectrometer.
10. A helium leak detection method based on the double-layer-tube helium leak detection device with the interlayer of any one of claims 1 to 9, comprising:
introducing helium into the inner tube through a helium gas inlet hole formed in the first blocking plate (4), and detecting the air tightness of the inner tube through a helium mass spectrometer connected to the sealing flange box (2);
helium is introduced into the outer pipe through a helium gas inlet hole arranged on the gas charging cover (8); and the air tightness of the outer tube is detected by a helium mass spectrometer connected to the sealed flange box (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010979928.4A CN111947850B (en) | 2020-09-17 | 2020-09-17 | Helium leakage detection device and method for double-layer tube with interlayer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010979928.4A CN111947850B (en) | 2020-09-17 | 2020-09-17 | Helium leakage detection device and method for double-layer tube with interlayer |
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| CN111947850A true CN111947850A (en) | 2020-11-17 |
| CN111947850B CN111947850B (en) | 2024-05-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594558A (en) * | 2020-11-27 | 2021-04-02 | 江苏核电有限公司 | Method for positioning leakage point of inner pipe of long-distance double-layer pipe |
| CN117020590A (en) * | 2023-10-08 | 2023-11-10 | 核工业西南物理研究院 | Manufacturing method of special pipe with interlayer |
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2020
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Cited By (3)
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| CN112594558A (en) * | 2020-11-27 | 2021-04-02 | 江苏核电有限公司 | Method for positioning leakage point of inner pipe of long-distance double-layer pipe |
| CN112594558B (en) * | 2020-11-27 | 2022-01-07 | 江苏核电有限公司 | Method for positioning leakage point of inner pipe of long-distance double-layer pipe |
| CN117020590A (en) * | 2023-10-08 | 2023-11-10 | 核工业西南物理研究院 | Manufacturing method of special pipe with interlayer |
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| CN111947850B (en) | 2024-05-07 |
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