CN105067251A - Low-temperature failure detector for titanium-nickel-iron memory alloy joint - Google Patents
Low-temperature failure detector for titanium-nickel-iron memory alloy joint Download PDFInfo
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- CN105067251A CN105067251A CN201510512142.0A CN201510512142A CN105067251A CN 105067251 A CN105067251 A CN 105067251A CN 201510512142 A CN201510512142 A CN 201510512142A CN 105067251 A CN105067251 A CN 105067251A
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- Prior art keywords
- memory alloy
- hole
- outer sleeve
- titanium
- pipeline
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 78
- LMBUSUIQBONXAS-UHFFFAOYSA-N [Ti].[Fe].[Ni] Chemical compound [Ti].[Fe].[Ni] LMBUSUIQBONXAS-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 16
- 239000007788 liquid Substances 0.000 abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a low-temperature failure detector for a titanium-nickel-iron memory alloy joint, and relates to the technical field of aviation detection. The detector comprises a pipeline, an outer bushing and plugs, wherein the detected memory alloy joint sleeves the pipeline, the center of the outer bushing is provided with a through hole of the outer bushing, the bushing and the memory alloy joint are mounted in the through hole of the outer bushing, the wall of the outer bushing is provided with an observation hole, the observation hole is communicated with the external of the bushing, the through hole of the outer bushing is arranged at the center of the observation hole, and the two plugs are connected with the two ends of the pipeline/outer bushing respectively. The detector has the advantages that manufacture technology is simple, part of components employs finished products to be detected, failure of the components is consistent with that of the products, the detector does not use any other chemical materials, the liquid nitrogen storage environment is not polluted, use is simple and convenient, and whether the product has failure can be visually seen.
Description
Technical Field
The invention relates to the technical field of aviation detection, in particular to a low-temperature failure detection device for a titanium-nickel-iron memory alloy joint.
Background
The titanium-nickel-iron memory alloy is a novel functional material developed in the early 60 s, and has been widely applied to the fields of aviation, aerospace, medical treatment and the like. The titanium-nickel-iron memory alloy pipe joint is one of the products of memory alloy which is widely applied to airplanes and is mature, has the advantages of high reliability, difficult leakage, simple structure, convenient installation, assembly space saving and the like, is used as a permanent joint on a titanium alloy pipeline of a hydraulic system of an American naval F-14 fighter at the beginning in the last 60 years, is popularized to military airplane battlefield maintenance and civil airplanes, can be connected with titanium alloy, stainless steel and aluminum alloy pipes, and is suitable for airplane hydraulic pipeline systems with working pressures of 21MPa, 28MPa and 35 MPa.
The fitting clearance of the memory alloy pipe joint is the difference between the minimum inner diameter after the pipe joint is expanded and the outer diameter of the pipe to be connected. A large interference is desired in view of the joining strength, and a large assembly gap is desired in view of the assembly. The principle of determining the assembly clearance is to preferentially ensure the connection strength, and the assembly clearance should be as small as possible on the premise of meeting the assembly requirement.
The storage of the titanium-nickel-iron memory alloy pipe joint product must be guaranteed to be stored below the austenite transformation temperature, and at present, a liquid nitrogen box is adopted for storage, but due to the gasification of the liquid nitrogen, the amount of the liquid nitrogen is reduced along with the time, so that the titanium-nickel-iron memory alloy joint stored in the titanium-nickel-iron memory alloy pipe joint can rebound due to the fact that the temperature is higher than the austenite transformation temperature, the inner diameter is reduced, the titanium-nickel-iron memory alloy pipe joint cannot be installed, and the titanium-nickel-iron memory alloy pipe joint fails. There is currently no good way to verify that a stored splice has failed.
Disclosure of Invention
The invention aims to provide a low-temperature failure detection device for a titanium-nickel-iron memory alloy joint, which aims to solve the problem that whether the joint fails or not is inconvenient to detect.
The technical scheme of the invention is as follows: a low-temperature failure detection device for a titanium-nickel-iron memory alloy joint is used for detecting whether the memory alloy joint fails or not and comprises a pipeline, an outer sleeve and a plug. Wherein,
the shape of the pipeline is cylindrical, and the memory alloy connector is sleeved on the outer circle of the pipeline;
the center of the outer sleeve is provided with an outer sleeve through hole, the pipeline and the memory alloy joint are arranged in the outer sleeve through hole of the outer sleeve, the pipe wall of the outer sleeve is provided with an observation hole, the observation hole is communicated with the outer part of the outer sleeve and the outer sleeve through hole arranged at the center of the outer sleeve, and the observation hole is used for observing whether the memory alloy joint moves on the pipeline or not;
the plug is provided with two pieces which are respectively connected with the pipeline and the two ends of the outer sleeve, and the plug is used for supporting the pipeline and the outer sleeve.
Preferably, the center of the pipeline is provided with a cylindrical through hole, so that the weight of the pipeline can be reduced.
Preferably, the observation hole is provided with at least one, whether the memory alloy joint moves in the axial direction of the pipeline can be observed through the observation hole arranged on the outer sleeve, if the memory alloy joint moves in the axial direction of the pipeline, the memory alloy joint does not fail, if the memory alloy joint does not move in the axial direction of the pipeline, the memory alloy joint inner hole is shrunk and fixed on the pipeline, and the memory alloy joint can be judged to fail. .
Preferably, the outer sleeve is cylindrical in shape, and the outer sleeve through hole is a cylindrical through hole.
Preferably, the plug is of an annular flange structure, and a plug through hole is formed in the central axis direction, so that the weight of the plug can be reduced.
Preferably, the plug is provided with an annular groove, and the annular groove is used for installing an outer sleeve.
Preferably, the pipeline adopts a finished titanium alloy pipe matched with the memory alloy joint for use. The titanium alloy pipe finished product is a part matched with the memory alloy joint when the memory alloy joint is used, so that whether the memory alloy joint fails or not can be judged more directly by using the titanium alloy pipe finished product.
Preferably, the outer sleeve and the plug are made of PVC plastic. The adopted material can reduce the weight of the part, and is easy to process, and the PVC material is soft, so that the memory alloy joint and the pipeline cannot be damaged.
Preferably, the observation hole is a cylindrical through hole, the diameter of the cylindrical hole is smaller than the length of the memory alloy joint, and the distance between the central position of the observation hole and the far end of the outer sleeve is larger than the length of the memory alloy joint.
Preferably, the observation hole is a long-strip hole, the length direction of the long-strip hole is the axial direction of the outer sleeve, and the length of the long-strip hole is greater than that of the memory alloy joint.
The detection device is assembled in liquid nitrogen, and when the joint does not lose efficacy due to overhigh temperature of the liquid nitrogen box, the detection device is shaken left and right, so that the titanium-nickel-iron memory alloy joint can be seen in the observation hole. When the connector fails due to overhigh temperature of the liquid nitrogen tank, the titanium-nickel-iron memory alloy connector is in interference connection with the pipeline, cannot change position and is fixed at a certain position, and the titanium-nickel-iron memory alloy connector cannot be seen in the observation hole by shaking the detection device left and right.
The invention has the advantages that: the titanium-nickel-iron memory alloy joint low-temperature failure detection device is simple in manufacturing process, partial parts adopt finished products to be detected, whether the parts fail or not can be consistent with the products, other chemical raw materials are not used in the detection device, the liquid nitrogen storage environment is not polluted, the use is simple and convenient, and whether the products fail or not can be visually seen.
Drawings
FIG. 1 is a schematic structural diagram of a device for detecting a low-temperature failure of a TiNiFe memory alloy joint according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for detecting a low-temperature failure of a ti-ni-fe memory alloy joint according to a second embodiment of the present invention.
Wherein: 1-memory alloy joint, 2-pipeline, 3-outer sleeve, 31-observation hole, 4-plug.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. 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. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
Example 1:
as shown in fig. 1, a device for detecting low-temperature failure of a ti-ni-fe memory alloy joint is used for detecting whether a memory alloy joint 1 fails, and includes a pipeline 2, an outer sleeve 3 and a plug 4.
The pipeline 2 adopts a finished titanium alloy pipe matched with the memory alloy joint 1 for use. The finished titanium alloy pipe is a part matched with the memory alloy joint 1 when in use, so that whether the memory alloy joint 1 fails or not can be judged more directly by using the finished titanium alloy pipe.
It will be appreciated that the line 2 can also be set according to the actual situation. For example, in an alternative implementation, the pipeline 2 is a round pipe manufactured according to a titanium alloy pipe product used in cooperation with the memory alloy connector 1, and a through hole is formed in the pipe, and the through hole is used for being connected with the plug 4; in another alternative embodiment, the outer circle of the pipeline 2 is processed according to the size of the finished titanium alloy pipe used with the memory alloy connector 1, the pipeline 2 is a solid cylinder, and blind holes are arranged at two ends of the pipeline and used for being connected with the plug 4.
The outer sleeve 3 is cylindrical, and the outer sleeve through hole is cylindrical. The sleeve 2 and the memory alloy joint 1 are arranged in the outer sleeve through hole of the outer sleeve 3. The two ends of the outer sleeve 3 are connected with the plugs 4.
It will be appreciated that the shape of the outer sleeve 3 may also be set according to the actual circumstances. For example, in an alternative embodiment, the outer sleeve 3 is configured as a square and the outer sleeve through hole is configured as a cylindrical through hole. The two ends of the outer sleeve 3 and the plug 4 matched with the outer sleeve are also set to be a square flange at one end and a cylinder at the other end.
The outer sleeve 3 is provided with 4 viewing holes 31. The observation hole 31 is a cylindrical through hole, the diameter of the cylindrical through hole is smaller than the length of the memory alloy joint 1, the observation hole 31 is symmetrically arranged in the axial direction of the outer sleeve 3, and the distance between the center position of the observation hole 31 and the far end of the outer sleeve 3 is larger than the length of the memory alloy joint 1. The observation holes 31 are symmetrically arranged 180 ° apart in the circumferential direction of the outer sleeve 3.
It is understood that the observation holes 31 may be provided in one or more, and at least one, as required.
Whether the memory alloy joint 1 moves in the axial direction of the pipeline 2 can be observed through the observation hole 31 arranged on the outer sleeve 3, if the memory alloy joint 1 moves in the axial direction of the pipeline 2, the memory alloy joint 1 does not fail, and if the memory alloy joint 1 cannot move in the axial direction of the pipeline 2 through the observation hole 31, the memory alloy joint 1 is contracted and fixed on the pipeline 2, and the memory alloy joint 1 can be judged to fail.
The plug 4 is of an annular flange structure, and a plug through hole is formed in the central axis. The weight of the plug 4 can be reduced by the plug through hole. The plug 4 of each set of detection device is provided with 2 pieces which are respectively arranged at the two ends of the pipeline 2 and the outer sleeve 3. The plug 4 supports the pipeline 2 and the outer sleeve 3. One end of the plug 4 is set to be a cylindrical section, the other end of the plug 4 is set to be an annular flange, the diameter of the outer circle of the cylindrical section is matched with the inner hole of the pipeline 2, an annular groove is formed in one end face, close to the cylindrical section of the plug 4, of the annular flange of the plug 4, and two ends of the outer sleeve 3 are clamped in the annular groove.
The outer sleeve 3 and the plug 4 are made of PVC plastic. The adopted materials can reduce the weight of the parts, and are easy to process, and the PVC material is soft, so that the memory alloy connector 1 and the pipeline 2 are not damaged. The plug 4 can be integrally formed by casting or machined.
Example 2:
as shown in fig. 2, embodiment 2 is substantially the same as embodiment 1 described above, except that: the plug 4 is of a double-step flange structure, and the processing is more convenient. The plug 4 is provided with a central through hole, a first step close to the through hole is used for installing the pipeline 2, and a second step close to the excircle is used for installing the outer sleeve 3.
Example 3:
example 3 is substantially the same as example 1 above, except that: the observation hole 31 is a long hole, the length direction of the long hole is the axial direction of the outer sleeve 3, and the length of the long hole is larger than that of the memory alloy joint 1.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A low-temperature failure detection device for a titanium-nickel-iron memory alloy joint is used for detecting whether a memory alloy joint (1) fails or not, and is characterized in that: comprises a pipeline (2), an outer sleeve (3) and a plug (4), wherein,
the pipeline (2) is cylindrical in shape, and the memory alloy connector (1) is sleeved on the outer circle of the pipeline (2);
an outer sleeve through hole is formed in the center of the outer sleeve (3), the pipeline (2) and the memory alloy connector (1) are installed in the outer sleeve through hole of the outer sleeve (3), an observation hole (31) is formed in the pipe wall of the outer sleeve (3), the observation hole (31) is communicated with the outer part of the outer sleeve (3) and the outer sleeve through hole formed in the center of the outer sleeve, and the observation hole (31) is used for observing whether the memory alloy connector (1) moves on the pipeline (2);
the plug (4) is provided with two pieces which are respectively connected with the two ends of the pipeline (2) and the outer sleeve (3), and the plug (4) is used for supporting the pipeline (2) and the outer sleeve (3).
2. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: the center of the pipeline (2) is provided with a cylindrical through hole.
3. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: at least one observation hole (31) is arranged.
4. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: the outer sleeve (3) is cylindrical, and the outer sleeve through hole is a cylindrical through hole.
5. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: the plug (4) is of an annular flange structure, and a plug through hole is formed in the central axis direction.
6. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: and the plug (4) is provided with an annular groove, and the annular groove is used for installing the outer sleeve (3).
7. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: the pipeline (2) adopts a finished titanium alloy pipe matched with the memory alloy joint (1).
8. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: the outer sleeve (3) and the plug (4) are made of PVC plastic.
9. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: the observation hole (31) is a cylindrical through hole, the diameter of the cylindrical hole is smaller than the length of the memory alloy joint (1), and the distance between the center of the observation hole (31) and the far end of the outer sleeve (3) is larger than the length of the memory alloy joint (1).
10. The device for detecting the low-temperature failure of the titanium-nickel-iron memory alloy joint according to claim 1, wherein: the observation hole (31) is a long hole, the length direction of the long hole is the axial direction of the outer sleeve (3), and the length of the long hole is larger than that of the memory alloy joint (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512142.0A CN105067251A (en) | 2015-08-19 | 2015-08-19 | Low-temperature failure detector for titanium-nickel-iron memory alloy joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512142.0A CN105067251A (en) | 2015-08-19 | 2015-08-19 | Low-temperature failure detector for titanium-nickel-iron memory alloy joint |
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| Publication Number | Publication Date |
|---|---|
| CN105067251A true CN105067251A (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510512142.0A Pending CN105067251A (en) | 2015-08-19 | 2015-08-19 | Low-temperature failure detector for titanium-nickel-iron memory alloy joint |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103806U (en) * | 1990-12-29 | 1992-05-06 | 上海钢铁研究所 | Measurer for marmem properties |
| CN101122559A (en) * | 2006-08-10 | 2008-02-13 | 北京有色金属研究总院 | Multifunctional tester for shape memory alloy wire material |
| JP4311750B2 (en) * | 2006-07-18 | 2009-08-12 | 株式会社水道技術開発機構 | Water pressure test apparatus for pipe joint and water pressure test method using the same |
| CN103189726A (en) * | 2010-11-01 | 2013-07-03 | 马里凯普有限公司 | Method and apparatus for pressure testing a pipe joint |
| CN103698073A (en) * | 2013-12-27 | 2014-04-02 | 南昌航空大学 | Device and method for testing fastening pressure of shape memory alloy pipe joint |
| CN104076000A (en) * | 2014-06-27 | 2014-10-01 | 国家电网公司 | Indicator for indicating dampness state of oil-immersed-type high-voltage bushing |
-
2015
- 2015-08-19 CN CN201510512142.0A patent/CN105067251A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103806U (en) * | 1990-12-29 | 1992-05-06 | 上海钢铁研究所 | Measurer for marmem properties |
| JP4311750B2 (en) * | 2006-07-18 | 2009-08-12 | 株式会社水道技術開発機構 | Water pressure test apparatus for pipe joint and water pressure test method using the same |
| CN101122559A (en) * | 2006-08-10 | 2008-02-13 | 北京有色金属研究总院 | Multifunctional tester for shape memory alloy wire material |
| CN103189726A (en) * | 2010-11-01 | 2013-07-03 | 马里凯普有限公司 | Method and apparatus for pressure testing a pipe joint |
| CN103698073A (en) * | 2013-12-27 | 2014-04-02 | 南昌航空大学 | Device and method for testing fastening pressure of shape memory alloy pipe joint |
| CN104076000A (en) * | 2014-06-27 | 2014-10-01 | 国家电网公司 | Indicator for indicating dampness state of oil-immersed-type high-voltage bushing |
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Application publication date: 20151118 |