CN112649284A - Auxiliary device for testing low-temperature mechanical properties of material - Google Patents
Auxiliary device for testing low-temperature mechanical properties of material Download PDFInfo
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- CN112649284A CN112649284A CN202110031460.0A CN202110031460A CN112649284A CN 112649284 A CN112649284 A CN 112649284A CN 202110031460 A CN202110031460 A CN 202110031460A CN 112649284 A CN112649284 A CN 112649284A
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- 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
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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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Abstract
The invention provides an auxiliary device for testing the low-temperature mechanical property of a material, which comprises: the device comprises a cylinder body, a vacuum interlayer is formed between the inner wall and the outer wall of the cylinder body, low-temperature liquid is filled in the cylinder body, and a clamping arm of a material testing machine, a mechanical support of the material testing machine and a sample are arranged in the cylinder body; and the observation window assembly is arranged in the cylinder body so as to observe the low-temperature mechanical property test process of the sample in the cylinder body. The auxiliary device for testing the low-temperature mechanical property of the material provided by the invention realizes the visualization of the testing process of the low-temperature mechanical property of the material by arranging the observation window component; meanwhile, the auxiliary device for testing the low-temperature mechanical property of the material can realize the visualization of the testing process of the low-temperature mechanical property of the material in different low-temperature regions by using different low-temperature working media, and provides technical support for the evaluation of the mechanical property of the material in a low-temperature environment, the research of the damage process of the material and the optimization control of the material process.
Description
Technical Field
The invention relates to the technical field of material mechanical property tests, in particular to an auxiliary device for a material low-temperature mechanical property test.
Background
With the development of the fields of aerospace, nuclear fusion energy, hydrogen energy, application superconductivity, gas industry, some large scientific engineering and the like in China, more and more projects related to low-temperature engineering are provided, the requirements of the fields on low-temperature materials are more and more large, and meanwhile, the requirements on performance data of the low-temperature materials are more and more comprehensive.
The low-temperature material refers to metal and alloy materials thereof which are suitable for being used from below zero to absolute zero. The material works in a low-temperature environment, and various mechanical properties of the material are greatly different from those of the material in a normal-temperature environment. The mechanical property of the material is an important performance index of the material or a workpiece in engineering, and the mechanical property of the tested material at low temperature has important significance for the research and optimization modification of the low-temperature performance of the material and is also important for the design and safe use of low-temperature components.
At present, the common low-temperature environment is mostly obtained by adopting a liquid nitrogen (-196 ℃) refrigeration method. The low-temperature mechanical support and a sample to be tested are soaked in a liquid nitrogen testing device for testing, so that various low-temperature mechanical performance indexes of the material are obtained. However, the existing testing device is made of low-temperature stainless steel materials, and the change processes of material testing, such as deformation, delamination, damage expansion and the like, cannot be directly observed in the testing process, so that the further research on the low-temperature performance of the material is hindered.
Disclosure of Invention
The invention provides an auxiliary device for testing the mechanical properties of a material at low temperature, which is used for solving the defect that a testing device in the prior art cannot directly observe the change process of the mechanical properties of the material.
The invention provides an auxiliary device for testing the low-temperature mechanical property of a material, which comprises: the device comprises a cylinder body, a vacuum interlayer is formed between the inner wall and the outer wall of the cylinder body, low-temperature liquid is filled in the cylinder body, and a clamping arm of a material testing machine, a mechanical support of the material testing machine and a sample are arranged in the cylinder body; and the observation window assembly is arranged in the cylinder body so as to observe the low-temperature mechanical property test process of the sample in the cylinder body.
According to the invention, the auxiliary device for testing the low-temperature mechanical property of the material is provided, and the cylinder comprises: an inner cylinder filled with the cryogenic liquid; the outer cylinder is sleeved outside the inner cylinder; the sealing flange is covered at the tops of the inner cylinder and the outer cylinder so as to form a closed space in the space between the inner cylinder and the outer cylinder; the sealing flange is characterized in that a through hole is formed in the center of the sealing flange, and the size of the through hole is matched with that of the inner cylinder, so that the inner cylinder is opened.
According to the invention, the auxiliary device for the low-temperature mechanical property test of the material is provided, and the observation window assembly comprises: the first observation window assembly is arranged on the outer wall of the inner barrel; and the second observation window component is arranged on the outer wall of the outer barrel and is coaxially arranged with the first observation window component.
According to the invention, the auxiliary device for the low-temperature mechanical property test of the material is provided, and the first observation window assembly comprises: the first cylinder is arranged on the outer wall of the inner cylinder; the first quartz glass is hermetically arranged in the first cylinder; the first cylinder is made of kovar alloy, or the first cylinder and the first quartz glass are connected in a sealing mode through a kovar alloy layer.
According to the invention, the auxiliary device for the low-temperature mechanical property test of the material is provided, and the second observation window assembly comprises: the second cylinder is arranged on the outer wall of the outer cylinder and is coaxial with the first cylinder; and the second quartz glass is hermetically arranged in the second cylinder.
According to the invention, the auxiliary device for the low-temperature mechanical property test of the material is provided, and the second observation window assembly comprises: the third cylinder is arranged on the outer wall of the outer cylinder and is coaxial with the first cylinder; the free flange is connected with the third cylinder; and the third quartz glass is arranged in the free flange.
According to the auxiliary device for testing the low-temperature mechanical property of the material, provided by the invention, the auxiliary device further comprises a plurality of sealing rings, a first sealing groove is formed in the side wall of the third cylinder, a second sealing groove is formed in the side wall of the free flange, and the sealing rings are respectively arranged in the first sealing groove and the second sealing groove and are respectively contacted with two side faces of the third quartz glass.
The auxiliary device for testing the low-temperature mechanical property of the material further comprises a vacuum sealing extraction opening arranged on the outer wall of the outer barrel.
The invention provides an auxiliary device for testing the low-temperature mechanical property of a material, which further comprises: a recovery channel, a first end of which is connected with the inner cylinder and a second end of which extends to the outside of the outer cylinder; and the low-temperature valve is arranged at the second end of the recovery channel.
The auxiliary device for testing the low-temperature mechanical property of the material further comprises a high-vacuum multilayer heat-insulating material for the cryogenic container, and the outer wall and the bottom surface of the inner cylinder are coated with the high-vacuum multilayer heat-insulating material for the cryogenic container.
The auxiliary device for testing the low-temperature mechanical property of the material provided by the invention realizes the visualization of the testing process of the low-temperature mechanical property of the material by arranging the observation window component; meanwhile, the auxiliary device for testing the low-temperature mechanical property of the material can realize the visualization of the testing process of the low-temperature mechanical property of the material in different low-temperature regions by using different low-temperature working media, and provides technical support for the evaluation of the mechanical property of the material in a low-temperature environment, the research of the damage process of the material and the optimization control of the material process.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an auxiliary device for low-temperature mechanical property testing of a material provided by the invention;
fig. 2 is a partially enlarged view at a shown in fig. 1;
reference numerals:
10: an inner barrel; 11: an outer cylinder; 12: sealing the flange;
13: vacuum sealing and opening drawing; 14: a recovery channel; 15: a low temperature valve;
16: a handle; 20: a first cylinder; 21: a first quartz glass;
22: a kovar alloy layer; 30: a third cylinder; 31: a free flange;
32: a third quartz glass; 33: and (5) sealing rings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present 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.
The auxiliary device for the low-temperature mechanical property test of the material is described in the following with reference to fig. 1.
The embodiment of the invention provides an auxiliary device for testing the low-temperature mechanical property of a material, which comprises: barrel and observation window subassembly. A vacuum space is formed between the inner wall and the outer wall of the cylinder, low-temperature liquid is filled in the cylinder, and a clamping arm of the material testing machine, a mechanical support of the material testing machine and a sample are arranged in the cylinder so as to test the mechanical property of the sample at low temperature. The observation window assembly is arranged on the outer wall of the cylinder body so as to observe the test process of the low-temperature mechanical property of the sample.
Particularly, an interlayer formed between the inner wall and the outer wall of the cylinder body is vacuumized, so that a sealed vacuum interlayer is formed between the inner wall and the outer wall of the cylinder body, heat leakage can be effectively reduced, evaporation of low-temperature liquid in the cylinder body is reduced, and a low-temperature environment is provided for testing the low-temperature mechanical property of the material. Further, the cryogenic liquid may be liquid nitrogen, or may be liquid helium, among other cryogenic liquids. In one embodiment of the invention, optionally, the cryogenic liquid is liquid nitrogen. Further, in the present embodiment, the low-temperature mechanical property test of the material refers to the mechanical property test of the material at-196 ℃.
Furthermore, the cylinder body is made of low-temperature steel materials, can be suitable for a low-temperature environment, and the inner surface and the outer surface of the cylinder body are polished. Low temperature steel may also be referred to as cryogenic or ultra-low temperature steel, meaning an alloy steel suitable for use below 0 ℃ and capable of being used at-196 ℃. Optionally, the material of the cylinder is 18-8 type chrome-nickel stainless acid-resistant steel.
In the actual test process, the cylinder body contains low-temperature liquid such as liquid nitrogen, and when the low-temperature liquid in the cylinder body is the liquid nitrogen, the internal working environment temperature is-196 ℃. The clamping arms and the mechanical supports of the mechanical testing machines with different sizes and types can move up and down in the cylinder, a sample needs to be submerged in liquid nitrogen before testing and is cooled to the temperature of the liquid nitrogen (or corresponding refrigerating fluid is adopted according to the required temperature to obtain the required low-temperature environment), when the sample reaches the preset temperature and is stable, the universal material testing machine is started to perform mechanical test, and loads such as stretching, compression, shearing, bending, fatigue and the like are applied to the sample under the condition of soaking and cooling of the liquid nitrogen. When the liquid nitrogen in the cylinder body is insufficient, the liquid nitrogen can be conveniently added through the opening above the cylinder body. The liquid nitrogen is colorless transparent liquid, and light rays enter from an opening above the barrel body, so that visual observation is conveniently realized. The camera or the CCD high-speed camera is arranged on the outer side of the observation window assembly, and the behaviors of deformation, delamination, damage and the like generated when the material is stressed in a low-temperature environment can be observed, photographed, shot and recorded through the observation window of the observation window assembly.
In an embodiment of the present invention, optionally, the observation window assembly includes a first observation window assembly and a second observation window assembly, the first observation window assembly is installed on the inner wall of the cylinder, the second observation window assembly is coaxially arranged with the first observation window assembly and installed on the outer wall of the cylinder, and the process of performing the low-temperature mechanical property test on the sample inside the cylinder can be observed through the second observation window assembly and the first observation window assembly.
Further, the observation window assembly comprises a cylinder flange and quartz glass. Optionally, the quartz glass is installed at one end of the cylinder flange, the other ends of the two cylinder flanges are respectively installed on the inner wall and the outer wall of the cylinder, and the two cylinder flanges are coaxially arranged so as to observe the process of testing the low-temperature mechanical property of the sample in the cylinder.
Further, in an embodiment of the present invention, optionally, the cylinder flange and the cylinder are hermetically connected by argon arc welding.
It can be understood that: according to the auxiliary device for testing the low-temperature mechanical property of the material, provided by the embodiment of the invention, the sealing cover can be arranged at the top of the cylinder body or the heat-insulating layer can be arranged in the cylinder body, so that the visual observation, photographing, camera shooting and recording of the testing process of the low-temperature mechanical property of the material in different low-temperature regions can be realized.
The auxiliary device for testing the low-temperature mechanical property of the material provided by the embodiment of the invention realizes the visualization of the testing process of the low-temperature mechanical property of the material by arranging the observation window component; meanwhile, the auxiliary device for testing the low-temperature mechanical property of the material provided by the embodiment of the invention can realize the visualization of the testing process of the low-temperature mechanical property of the material in different low-temperature regions by using different low-temperature working media, and provides technical support for the evaluation of the mechanical property of the material in a low-temperature environment, the research of the damage process of the material and the optimization control of the material process.
As shown in fig. 1, in one embodiment of the present invention, the cartridge comprises: an inner cylinder 10, an outer cylinder 11 and a sealing flange 12. The inner cylinder 10 is filled with a low temperature liquid, and the material testing machine and the sample are arranged in the inner cylinder 10 so that the sample is in a low temperature environment. The outer cylinder 11 is sleeved outside the inner cylinder 10, and a gap is formed between the outer cylinder 11 and the inner cylinder 10. A sealing flange 12 is disposed on top of the inner and outer cylinders 10 and 11 to form a closed space with a gap between the inner and outer cylinders 10 and 11. Further, a through hole is formed at the center of the sealing flange 12, and the size of the through hole matches with the size of the inner cylinder 10, so that the inner cylinder 10 forms an opening, and when the low-temperature liquid in the inner cylinder 10 is insufficient, the low-temperature liquid can be conveniently added through the opening above the inner cylinder 10. Meanwhile, light enters from an opening above the inner barrel 10, and visual observation is conveniently achieved.
Further, in an embodiment of the present invention, the sidewall of the inner cylinder 10 has a thin-walled structure, which can reduce heat leakage generated by heat conduction. Optionally, in one embodiment of the invention, the wall thickness is 1.2 millimeters.
According to the auxiliary device for testing the low-temperature mechanical property of the material, the upper opening of the inner cylinder is designed, the inner space of the inner cylinder is large, various clamps of different mechanical testing machines can be arranged, light can be irradiated into low-temperature liquid through the opening, the problem of polishing when a visual window is observed is solved, and meanwhile, when the low-temperature mechanical property of the material is tested, when the low-temperature liquid is found to be insufficient, and the temperature of the low-temperature environment in the inner cylinder is higher than the set temperature, the low-temperature liquid can be supplemented conveniently.
Further, in an embodiment of the present invention, the auxiliary device for testing the cryogenic mechanical properties of the material further includes a vacuum sealing exhaust port 13 disposed on the outer wall of the outer cylinder 11 to perform a vacuum process on the enclosed space between the inner cylinder 10 and the outer cylinder 11.
Specifically, before the low-temperature mechanical property test of a sample, the vacuum sealing pumping port 13 is connected with the molecular pump unit, the molecular pump unit is started, and when the vacuum degree in the closed space between the inner cylinder 10 and the outer cylinder 11 reaches high vacuum, namely the vacuum degree is less than 10-3After Pa, the vacuum sealing pumping port 13 is closed to form a sealed vacuum interlayer in the closed space between the inner cylinder 10 and the outer cylinder 11, so that heat leakage caused by air convection can be effectively reduced, and inner heat is reducedThe evaporation of the cryogenic liquid in the cylinder 10 provides a low temperature environment for the low temperature mechanical property test of the material.
Further, in an embodiment of the present invention, optionally, activated carbon with adsorption property may be placed in the vacuum interlayer to adsorb residual gas, so as to maintain the vacuum degree of the vacuum interlayer for a longer time and reduce the convective heat transfer of air.
Optionally, the outer surface of the sidewall and bottom of the inner cylinder 10 may be coated with a high vacuum multi-layer insulation material for a cryogenic container to further reduce radiant heat leakage and reduce evaporation of cryogenic liquid in the inner cylinder 10. In particular, in the high-vacuum interlayer space of the cryogenic container, a heat insulation mode is formed by alternately combining a spacing material and a reflecting screen. The spacer material includes: glass fiber paper, glass fiber cloth, chemical fiber paper and synthetic fiber screen. The reflecting screen includes: aluminum foil and aluminum-plated polyester film. In one embodiment of the present invention, the high vacuum multi-layer insulation material for the cryogenic vessel may be any combination of the above spacer material and the reflective screen. Alternatively, in one embodiment of the present invention, the number of layers of the high vacuum multi-layer insulation material for the cryogenic vessel is more than 30.
According to the auxiliary device for testing the low-temperature mechanical property of the material, provided by the embodiment of the invention, the side wall of the inner cylinder is of a thin-wall structure, so that the heat conduction can be reduced; the active carbon is arranged in the vacuum interlayer, so that the convection heat exchange of air can be reduced; the inner surface and the outer surface of the inner cylinder and the outer cylinder are polished, and the outer surface of the inner cylinder is coated with the high-vacuum multilayer heat-insulating material, so that the heat radiation can be reduced, the heat leakage between the auxiliary device and the outside is reduced, the evaporation of low-temperature liquid is reduced, and the sample can be kept in a low-temperature environment for a long time.
As shown in fig. 1 and 2, in one embodiment of the present invention, a viewing window assembly includes: a first viewing window assembly and a second viewing window assembly. The first observation window component is arranged on the outer wall of the inner barrel 10, and the second observation window component is arranged on the outer wall of the outer barrel 11 and is coaxial with the first observation window component.
Specifically, the first observation window assembly includes: a first cylinder 20 and a first quartz glass 21. The first cylinder 20 is installed on the outer wall of the inner cylinder 10, and the first quartz glass 21 is hermetically installed inside the first cylinder 20.
Specifically, since the first observation window assembly directly contacts with the cryogenic liquid, in this embodiment, the first observation window assembly directly contacts with the liquid nitrogen at a temperature of-196 ℃, and since the expansion coefficient of the quartz glass at low temperature is much smaller than that of the stainless steel material, when testing, if the first cylinder 20 is made of the cryogenic stainless steel, the first cylinder shrinks more when cooled, and the quartz glass is easily crushed. Further, in an embodiment of the present invention, in order to prevent the first cylinder 20 from damaging the first quartz glass 21 when it is shrunk by cooling, the material of the first cylinder 20 may be kovar alloy, i.e. 4J29 alloy, whose thermal expansion coefficient is close to that of the quartz glass, and has excellent welding performance, and good low-temperature structure stability, and the oxide film of the alloy is dense, can be well infiltrated by the quartz glass, and has excellent sealing performance, and can be connected with the first quartz glass 21 in a sealing manner to prevent leakage of liquid nitrogen.
Optionally, in order to prevent the first quartz glass 21 from being damaged when the first cylinder 20 contracts when cooled, a kovar alloy layer 22 may be disposed between the first cylinder 20 and the first quartz glass 21 for transition welding connection, so as to reduce the influence on the first quartz glass 21 when the first cylinder 20 contracts when cooled. Further, in the present embodiment, the material of the first cylinder 20 may be low temperature stainless steel.
Optionally, the second viewing window assembly comprises: a second cylinder and a second quartz glass. The second cylinder is installed on the outer wall of the outer cylinder 11 and is coaxially arranged with the first cylinder 20, and the second quartz glass is hermetically installed in the second cylinder. Specifically, the second cylinder and the second quartz glass can be sealed through matching; the second cylinder and the second quartz glass can also be connected together by means of pressure sealing, i.e. the second cylinder and the second quartz glass are connected by means of kovar alloy transition welding.
Optionally, the second viewing window assembly comprises: a third cylinder 30, a free flange 31 and a third quartz glass 32. Specifically, the first end of the third cylinder 30 is mounted on the outer wall of the outer cylinder 11 and is coaxially disposed with the first cylinder 20, the second end of the third cylinder 30 is formed with a flange, the outer surface of the flange is threaded, the inner surface of the first end of the free flange 31 is also threaded, and the flange of the third cylinder 30 is threaded with the first end of the free flange 31. A third quartz glass 32 is arranged at the second end of the free flange 31 in order to observe the test progress of the sample in the inner cylinder 10 through the third quartz glass 32 and the first quartz glass 21.
Further, in an embodiment of the present invention, the flange of the third cylinder 30 and the free flange 31 may also be connected by a bolt connection.
Further, in an embodiment of the present invention, optionally, the first cylinder 20 and the inner cylinder 10 may be mounted in an argon arc welding manner; the second or third cylinder 30 and the outer cylinder 11 may be mounted by argon arc welding.
Further, in an embodiment of the present invention, the auxiliary device for testing the material cryomechanical property further includes a plurality of sealing rings 33, a first sealing groove is formed on a side surface of the third cylinder 30 contacting the third quartz glass 32, a second sealing groove is formed on a side surface of the free flange 31 contacting the third quartz glass 32, and the plurality of sealing rings 33 are respectively disposed in the first sealing groove and the second sealing groove and contact with two side surfaces of the third quartz glass 32 to protect the third quartz glass 32 and prevent the third quartz glass 32 from being damaged by the free flange 31 when the free flange 31 is assembled with the flange of the third cylinder 30. At the same time, air is prevented from entering the vacuum interlayer from the second viewing window assembly.
Specifically, in the actual installation process, the sealing ring 33 can be placed in the first sealing groove, then the third quartz glass 32 can be pressed on the sealing ring 33, and then the free flange 31 can be fastened with the flange of the third cylinder 30, and it can be understood that: before fastening, the seal ring 33 is placed in the second seal groove of the free flange 31, and then the free flange 31 and the flange of the third cylinder 30 are fastened.
Further, in one embodiment of the present invention, the sealing ring 33 may be a teflon annular gasket or a rubber O-ring.
As shown in fig. 1, in an embodiment of the present invention, the auxiliary device for testing the low-temperature mechanical property of the material further includes: a recovery channel 14 and a cryogenic valve 15. Specifically, a first end of the recovery channel 14 is connected to the inner cylinder 10, a second end of the recovery channel extends to the outside of the outer cylinder 11, and a low-temperature valve 15 is disposed at the second end of the recovery channel 14 for recovering and reusing the low-temperature liquid in the inner cylinder 10.
As shown in fig. 1, in an embodiment of the present invention, the auxiliary device for testing the cryogenic mechanical properties of the material further includes a handle 16, and the handle 16 is mounted on the outer wall of the outer cylinder 11, so that the auxiliary device can be transferred to different kinds of mechanical testing machines to provide a cryogenic environment for the cryogenic mechanical properties test of the material.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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. An auxiliary device for testing the low-temperature mechanical property of a material is characterized by comprising:
the device comprises a cylinder body, a vacuum interlayer is formed between the inner wall and the outer wall of the cylinder body, low-temperature liquid is filled in the cylinder body, and a clamping arm of a material testing machine, a mechanical support of the material testing machine and a sample are arranged in the cylinder body;
and the observation window assembly is arranged in the cylinder body so as to observe the low-temperature mechanical property test process of the sample in the cylinder body.
2. The auxiliary device for the material cryomechanical property test of claim 1, wherein the cylinder comprises:
an inner cylinder filled with the cryogenic liquid;
the outer cylinder is sleeved outside the inner cylinder;
the sealing flange is covered at the tops of the inner cylinder and the outer cylinder so as to form a closed space in the space between the inner cylinder and the outer cylinder;
the sealing flange is characterized in that a through hole is formed in the center of the sealing flange, and the size of the through hole is matched with that of the inner cylinder, so that the inner cylinder is opened.
3. The aid for cryogenic mechanical property testing of materials according to claim 2, wherein the observation window assembly comprises:
the first observation window assembly is arranged on the outer wall of the inner barrel;
and the second observation window component is arranged on the outer wall of the outer barrel and is coaxially arranged with the first observation window component.
4. The aid for cryogenic mechanical property testing of materials according to claim 3, wherein the first sight glass assembly comprises:
the first cylinder is arranged on the outer wall of the inner cylinder;
the first quartz glass is hermetically arranged in the first cylinder;
the first cylinder is made of kovar alloy, or the first cylinder and the first quartz glass are connected in a sealing mode through a kovar alloy layer.
5. The aid for cryogenic mechanical property testing of materials according to claim 4, wherein the second sight glass assembly comprises:
the second cylinder is arranged on the outer wall of the outer cylinder and is coaxial with the first cylinder;
and the second quartz glass is hermetically arranged in the second cylinder.
6. The aid for cryogenic mechanical property testing of materials according to claim 4, wherein the second sight glass assembly comprises:
the third cylinder is arranged on the outer wall of the outer cylinder and is coaxial with the first cylinder;
the free flange is connected with the third cylinder;
and the third quartz glass is arranged in the free flange.
7. The auxiliary device for testing the cryogenic mechanical properties of the material according to claim 6, further comprising a plurality of sealing rings,
the lateral wall of third barrel is formed with first seal groove, the lateral wall of free flange is formed with the second seal groove, and is a plurality of the sealing washer sets up respectively in first seal groove with in the second seal groove, and respectively with two sides of third quartz glass contact.
8. The auxiliary device for testing the cryogenic mechanical properties of the material as claimed in claim 2, further comprising a vacuum sealing exhaust port arranged on the outer wall of the outer barrel.
9. The auxiliary device for testing the cryogenic mechanical properties of the material according to claim 2, further comprising:
a recovery channel, a first end of which is connected with the inner cylinder and a second end of which extends to the outside of the outer cylinder;
and the low-temperature valve is arranged at the second end of the recovery channel.
10. The auxiliary device for the material low-temperature mechanical property test is characterized by further comprising a high-vacuum multilayer heat-insulating material for the cryogenic container, wherein the outer wall and the bottom surface of the inner barrel are coated with the high-vacuum multilayer heat-insulating material for the cryogenic container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110031460.0A CN112649284A (en) | 2021-01-11 | 2021-01-11 | Auxiliary device for testing low-temperature mechanical properties of material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110031460.0A CN112649284A (en) | 2021-01-11 | 2021-01-11 | Auxiliary device for testing low-temperature mechanical properties of material |
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| CN112649284A true CN112649284A (en) | 2021-04-13 |
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| CN202110031460.0A Pending CN112649284A (en) | 2021-01-11 | 2021-01-11 | Auxiliary device for testing low-temperature mechanical properties of material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804717A (en) * | 2021-08-12 | 2021-12-17 | 江苏省特种设备安全监督检验研究院 | Visual experimental apparatus |
-
2021
- 2021-01-11 CN CN202110031460.0A patent/CN112649284A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804717A (en) * | 2021-08-12 | 2021-12-17 | 江苏省特种设备安全监督检验研究院 | Visual experimental apparatus |
| CN113804717B (en) * | 2021-08-12 | 2023-10-24 | 江苏省特种设备安全监督检验研究院 | Visual experimental device |
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