CN113865984B - Vacuum/inert gas protection test device suitable for radioactive tubular sample - Google Patents
Vacuum/inert gas protection test device suitable for radioactive tubular sample Download PDFInfo
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- CN113865984B CN113865984B CN202110955028.0A CN202110955028A CN113865984B CN 113865984 B CN113865984 B CN 113865984B CN 202110955028 A CN202110955028 A CN 202110955028A CN 113865984 B CN113865984 B CN 113865984B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/0238—Inert
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to a vacuum/inert gas protection test device suitable for a radioactive tubular sample, which comprises a rack, wherein a servo motor is fixed at the upper part of the rack and is connected with a piston through a piston rod, the piston is arranged in a piston cylinder, the side surface of the piston cylinder is arranged at an oil inlet, the piston cylinder is connected with the tubular sample through a sample-piston cylinder connecting piece, and a sample lower end enclosure is fixed at the lower end of the tubular sample; the vacuum/inert gas protection furnace is arranged at the lower part of the rack and can move up and down, the movable seal matched with the outer diameter of the sample-piston cylinder connecting piece is arranged at the upper end of the vacuum/inert gas protection furnace, and the vacuum/inert gas protection furnace is moved up to completely wrap the tubular sample during the test. The invention has simple operation, can complete the test operation such as sample loading and the like by matching with a mechanical hand in a hot chamber, has small volume of a pressure system and uniform pressure transmission and has high speed because the pressure transmission medium is oil or air.
Description
Technical Field
The invention relates to a performance testing device for a metal material, in particular to a vacuum/inert gas protection testing device suitable for internal pressure creep, fatigue, explosion and yield tests of a radioactive tubular sample.
Background
The internal pressure creep, fatigue, explosion, yield and the like of a radioactive tubular sample (such as a fuel cladding) need to be tested, but the conventional test device for testing the creep, the fatigue, the yield and the like of the sample cannot meet the requirement of the radioactive tubular sample for carrying out corresponding tests, so that the corresponding test device needs to be developed to complete the internal pressure creep, the fatigue, the explosion, the yield and the like of the radioactive tubular sample.
Disclosure of Invention
The invention aims to provide a vacuum/inert gas protection test device suitable for internal pressure creep, fatigue, blasting and yield test of a radioactive tubular sample, aiming at the defects of the prior art, so that the simple operation is realized and the test accuracy is ensured.
The technical scheme of the invention is as follows: a vacuum/inert gas protection test device suitable for a radioactive tubular sample comprises a rack, wherein a servo motor is fixed on the upper portion of the rack and is connected with a piston through a piston rod, the piston is arranged in a piston cylinder, the side face of the piston cylinder is provided with an oil inlet, the piston cylinder is connected with the tubular sample through a sample-piston cylinder connecting piece, and a sample lower end enclosure is fixed at the lower end of the tubular sample; the vacuum/inert gas protection furnace is arranged at the lower part of the rack and can move up and down, the movable seal matched with the outer diameter of the sample-piston cylinder connecting piece is arranged at the upper end of the vacuum/inert gas protection furnace, and the vacuum/inert gas protection furnace is moved up to completely wrap the tubular sample during the test.
Further, the vacuum/inert gas shielding test device suitable for the radioactive tubular sample further comprises an ultrasonic generator, wherein the ultrasonic generator is arranged on the rotatable support, the ultrasonic generator is moved to the tubular sample position before the test for removing bubbles mixed in oil liquid in the tubular sample, and the ultrasonic generator is removed during the test.
Further, the vacuum/inert gas protection test device suitable for the radioactive tubular sample is described above, wherein the piston is provided with an air outlet/overflow hole at the top end inside, and the air outlet/overflow hole can be opened and closed.
Further, the vacuum/inert gas shielding test device suitable for the radioactive tubular sample is described above, wherein a peep window is arranged on the vacuum/inert gas shielding furnace, and the change of the outer diameter of the tubular sample can be measured by a non-contact extensometer.
Further, the vacuum/inert gas shielding test device suitable for the radioactive tubular sample is described above, wherein a liquid outlet is arranged at the lower end of the vacuum/inert gas shielding furnace and is used for discharging oil liquid in the furnace.
Further, the vacuum/inert gas shielding test device suitable for the radioactive tubular sample as described above further comprises a furnace brush for removing oil in the vacuum/inert gas shielding furnace.
Further, the vacuum/inert gas protection test device suitable for the radioactive tubular sample is described above, wherein a water cooling jacket is arranged outside the dynamic seal of the vacuum/inert gas protection furnace.
Further, the vacuum/inert gas protection test device suitable for the radioactive tubular sample is characterized in that a pressure sensor is arranged in the piston cylinder, the pressure sensor is connected with a test control cabinet and used for transmitting a pressure signal in the piston cylinder, and the test control cabinet controls the servo motor to act.
Further, the vacuum/inert gas protection test device suitable for the radioactive tubular sample is characterized in that a thermocouple is arranged in the vacuum/inert gas protection furnace, the thermocouple is connected with a temperature control cabinet and is used for transmitting a temperature signal in the vacuum/inert gas protection furnace, and the temperature control cabinet sends a temperature control signal to the vacuum/inert gas protection furnace.
The invention has the following beneficial effects: the vacuum/inert gas protection test device suitable for internal pressure creep, fatigue, explosion and yield tests of radioactive tubular samples is simple and convenient to operate, can be matched with a manipulator in a hot chamber to complete test operations such as sample loading and the like, adopts oil or air as a pressure transmission medium, has a small volume of a pressure system, is uniform in pressure transmission and high in speed, and can meet the requirements of different pressure ranges by adjusting the sizes of a piston cylinder and a piston according to actual needs. Meanwhile, a vacuum/inert gas protection furnace is arranged, so that the sample can be protected, the sealing boundary adopts dynamic sealing, and the sealing requirement is simple to realize.
Drawings
FIG. 1 is an overall assembly drawing of a vacuum/inert gas shielding test apparatus suitable for radioactive tubular specimens in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a piston cylinder in the embodiment of the invention;
FIG. 3 is a schematic diagram illustrating a connection relationship between a piston and a servo motor according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a tubular sample in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a sample lower head in the embodiment of the invention;
FIG. 6 is a schematic illustration of the assembly of a specimen-piston cylinder connection with a tubular specimen in an embodiment of the invention;
FIG. 7 is a schematic view of a vacuum/inert gas protective furnace according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a brush in an embodiment of the present invention.
In the figure, 1, a frame 2, a servo motor 3, a piston cylinder 4, a piston cylinder bracket 5, a tubular sample 6, an ultrasonic generator 7, an ultrasonic generator bracket 8, a vacuum/inert gas protective furnace 9, a vacuum/inert gas protective furnace bracket 10, a sample lower end socket 11, a sample-piston cylinder connecting piece 12, a furnace brush 31, an oil inlet 81, a dynamic seal 82, a peep window 83, a liquid outlet
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention relates to a vacuum/inert gas protection test device suitable for internal pressure creep, fatigue, explosion and yield tests of radioactive tubular samples. As shown in figure 1, the whole set of test device mainly comprises a frame 1 for supporting all parts, a servo motor 2 is directly fixed on the bottom surface of an upper plate of the frame, the servo motor 2 is connected with a piston rod, the piston is arranged in a piston cylinder 3, and the piston cylinder 3 is fixed on the frame through a piston cylinder support 4. As shown in fig. 3, the servo motor 2, the piston cylinder 3 and the piston cooperate, and the servo motor compresses or pulls out the piston according to the control signal to generate oil/air pressure. As shown in figure 2, the side of the piston cylinder 3 is provided with an oil inlet 31 for adding oil into the system before the test, the topmost end inside the piston is provided with an air outlet/overflow hole which can be opened and closed, when the oil is added, air in the system can be discharged, and when the oil overflows, the oil is indicated to be full. The piston cylinder 3 is connected with a sample-piston cylinder connecting piece 11, the sample end of the sample-piston cylinder connecting piece 11 is connected with the tubular sample 5 in a welding mode, and the tubular sample 5 shown in figure 4 is welded with a sample lower end socket 10 (shown in figure 5). As shown in fig. 6, the sample-piston-cylinder connector 11, the tubular sample 5 and the sample lower head 10 are welded together to form a whole, so that the oil/air pressure generated by the servo motor 2 is transferred to the tubular sample 5 after the sample-piston-cylinder connector 11 is connected to the piston cylinder 3.
The frame 1 of the testing device is also provided with an ultrasonic generator 6, the ultrasonic generator 6 is arranged on a rotatable bracket 7, the height position of the ultrasonic generator 6 corresponds to that of the tubular sample 5, the rotatable bracket 7 moves the ultrasonic generator 6 to the position of the tubular sample when in use, and the bracket 7 is rotated to move away after the use is finished. The ultrasonic generator 6 is used to remove air bubbles mixed in the oil in the tubular sample 5 before the start of the test (which is not required if an air medium is used).
A vacuum/inert gas protective furnace 8 is provided at the lower part of the frame 1, and the vacuum/inert gas protective furnace 8 is installed on a vacuum/inert gas protective furnace support 9 and can move up and down. As shown in fig. 7, the upper end of the vacuum/inert gas protection furnace 8 is provided with a dynamic seal 81 and a dynamic seal cooling water jacket, the inner diameter of the dynamic seal 81 is matched with the outer diameter of the sample-piston cylinder connecting piece 11, the dynamic seal and the cooling water jacket are conventional structures in the prior art, after oil filling is completed, the vacuum/inert gas protection furnace 8 is directly moved upwards to completely wrap the sample 5, and the sample can be heated and simultaneously subjected to vacuum/inert gas protection when the dynamic seal 81 is matched with the sample-piston cylinder connecting piece 11. The inner cavity of the furnace is in a straight cylinder shape, so that oil liquid can be conveniently cleaned, and a glass peeping window 82 arranged on the outer side of the furnace can be provided with a non-contact extensometer for measuring the change of the outer diameter of the tubular sample. And a furnace brush 12 (see fig. 8) is provided to remove oil flowing into the furnace after the sample is broken. A liquid outlet 83 is provided below the vacuum/inert gas furnace for discharging the portion of the oil.
A pressure sensor is arranged in the piston cylinder 3, a signal is transmitted to a test control cabinet, the test control cabinet gives a control signal of the servo motor 2 according to a test requirement and the feedback of the pressure sensor or the signal of a non-contact extensometer, and relevant data is recorded; the vacuum/inert gas protection furnace 8 is provided with a thermocouple, the thermocouple transmits a temperature signal to a temperature control cabinet, and the temperature control cabinet sends a temperature control signal to the vacuum/inert gas protection furnace 8 according to the test temperature requirement and the thermocouple signal to reach the target temperature.
The specific operation process of the vacuum/inert gas protection test device suitable for the internal pressure creep, fatigue, explosion and yield test of the radioactive tubular sample provided by the embodiment is as follows:
(1) When the pressure transmission medium is oil liquid:
the servo motor, the piston and the piston cylinder are installed together in advance, a lower seal head of the sample and the tubular sample are welded together in a welding mode, then the sample end of the sample-piston cylinder connecting piece is welded with the other end of the tubular sample, and the connecting end of the piston cylinder of the sample-piston cylinder connecting piece is connected with the lower end of the piston cylinder;
then moving an ultrasonic generator to the position of the tubular sample by using an ultrasonic generator support, carrying out ultrasonic treatment on the tubular sample, simultaneously inputting oil into the system from an oil inlet of a piston cylinder, wherein the input speed is relatively low, the oil slowly flows into the tubular sample, the ultrasonic generator is helpful for discharging air mixed in the oil in the system at the moment, the air is discharged from an air outlet/overflow hole on a piston, when the continuous oil overflows from the air outlet/overflow hole on the piston, the oil in the system is fully filled, the air is completely discharged, and at the moment, the air outlet/overflow hole of the piston and an oil inlet valve of the piston cylinder are closed by controlling a switch through an electromagnetic valve, the ultrasonic generator is closed and moved away;
raising the vacuum/inert gas protection furnace to a position matched with the sample-piston cylinder connecting piece, namely completing the sealing of the boundary of the vacuum/inert gas protection furnace, at the moment, firstly opening a water cooling sleeve for the dynamic sealing of the vacuum/inert gas protection furnace, then opening heating and vacuum/inert gas protection, driving a piston to move downwards through a servo motor after the heating temperature meets the requirement, applying pressure to oil liquid, and carrying out tests such as internal pressure creep, fatigue, explosion, yield and the like;
after the test is finished, if the tubular sample is broken, a part of oil liquid can enter the furnace cavity of the vacuum/inert gas protection furnace, the test is finished, the vacuum/inert gas protection furnace is lowered, then the furnace brush is gradually inserted into the bottom from the upper end of the vacuum/inert gas protection furnace, the liquid discharge hole in the lower end of the vacuum/inert gas protection furnace is opened, the oil liquid can be discharged through the liquid discharge hole, a cleaning machine can be used for washing if necessary, after the cleaning is finished, the sample is disassembled, and then the next test can be continuously carried out.
(2) When the pressure transmission medium is air:
the servo motor, the piston and the piston cylinder are installed together in advance, a lower seal head of the sample and the tubular sample are welded together in a welding mode, then a sample end of a sample-piston cylinder connecting piece is welded with the other end of the tubular sample, a piston cylinder connecting end of the sample-piston cylinder connecting piece is connected with the lower end of the piston cylinder, and at the moment, an air outlet/overflow hole in the piston and an oil inlet valve of the piston cylinder are closed;
then the vacuum/inert gas protection furnace is lifted to a position matched with the sample-piston cylinder connecting piece, namely the sealing of the boundary of the vacuum/inert gas protection furnace is completed, at the moment, a water cooling jacket for the dynamic sealing of the vacuum/inert gas protection furnace is firstly opened, then heating and vacuum/inert gas protection can be opened, and after the heating temperature meets the requirement, tests such as internal pressure creep, fatigue, explosion, yield and the like can be opened;
after the test is finished, the vacuum/inert gas protection furnace is lowered, the sample is disassembled, and then the next test can be continuously carried out.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. Thus, if such modifications and application-adaptive changes to the present invention are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and application-adaptive changes.
The above-described embodiments are merely illustrative of the present invention, and the present invention may be embodied in other specific forms or other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention should be indicated by the appended claims, and any changes that are equivalent to the intent and scope of the claims should be construed to be included therein.
Claims (8)
1. A vacuum/inert gas protection test device suitable for a radioactive tubular sample is characterized by comprising a rack (1), wherein a servo motor (2) is fixed at the upper part of the rack (1), the servo motor (2) is connected with a piston through a piston rod, the piston is arranged in a piston cylinder (3), an oil inlet (31) is formed in the side surface of the piston cylinder (3), the piston cylinder (3) is connected with a tubular sample (5) through a sample-piston cylinder connecting piece (11), and a sample lower end enclosure (10) is fixed at the lower end of the tubular sample (5); a vacuum/inert gas protection furnace (8) is arranged at the lower part of the rack (1), the vacuum/inert gas protection furnace (8) can move up and down, a movable seal (81) matched with the outer diameter of the sample-piston cylinder connecting piece (11) is arranged at the upper end of the vacuum/inert gas protection furnace (8), and the vacuum/inert gas protection furnace (8) is moved up during the test so as to completely wrap the tubular sample (5); the test device is characterized by further comprising an ultrasonic generator (6), wherein the ultrasonic generator (6) is arranged on a rotatable support (7), the ultrasonic generator (6) is moved to the position of the tubular sample (5) before a test, bubbles mixed in oil liquid in the tubular sample are removed, and the ultrasonic generator (6) is removed during the test.
2. The vacuum/inert gas shielding test device for radioactive tubular samples according to claim 1, wherein said piston is provided with an air/liquid vent at the top end inside, which can be opened and closed.
3. The vacuum/inert gas shielding test apparatus for radioactive tubular samples according to claim 1, wherein said vacuum/inert gas shielding furnace (8) is provided with a sight window (82) for measuring the change of the outer diameter of the tubular sample by a non-contact type extensometer.
4. The vacuum/inert gas shielding test apparatus for radioactive tubular samples according to claim 1 or 3, wherein said vacuum/inert gas shielding furnace (8) is provided with a liquid outlet (83) at a lower end thereof for discharging oil in the furnace.
5. The vacuum/inert gas shielding test apparatus for radioactive tubular samples according to claim 4, further comprising a brush (12) for removing oil from the vacuum/inert gas shielding furnace (8).
6. The vacuum/inert gas shielding test device for radioactive tubular samples according to claim 1, wherein a water cooling jacket is arranged outside the dynamic seal (81) of the vacuum/inert gas shielding furnace.
7. Vacuum/inert gas shielding test device suitable for radioactive tubular samples according to claim 1, characterized in that a pressure sensor is arranged in the piston cylinder (3), and the pressure sensor is connected with a test control cabinet for transmitting pressure signals in the piston cylinder, and the test control cabinet controls the action of the servo motor.
8. The vacuum/inert gas shielding test device suitable for radioactive tubular samples according to claim 1, wherein a thermocouple is arranged in the vacuum/inert gas shielding furnace (8), the thermocouple is connected with a temperature control cabinet and is used for transmitting a temperature signal in the vacuum/inert gas shielding furnace, and the temperature control cabinet sends a temperature control signal to the vacuum/inert gas shielding furnace.
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| CN202110955028.0A CN113865984B (en) | 2021-08-19 | 2021-08-19 | Vacuum/inert gas protection test device suitable for radioactive tubular sample |
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| CN202110955028.0A CN113865984B (en) | 2021-08-19 | 2021-08-19 | Vacuum/inert gas protection test device suitable for radioactive tubular sample |
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| CN113865984B true CN113865984B (en) | 2022-11-25 |
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| JP6092348B1 (en) * | 2015-11-09 | 2017-03-08 | 日本核燃料開発株式会社 | Biaxial stress loading device and test method for tubular specimen |
| CN106153472A (en) * | 2016-06-17 | 2016-11-23 | 华北电力大学 | A kind of realize multi-axial creep pilot system and the method that intrinsic pressure and stretching combinations loads |
| CN111323304A (en) * | 2020-04-09 | 2020-06-23 | 中国科学院金属研究所 | Creep performance testing device and method |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005147690A (en) * | 2003-11-11 | 2005-06-09 | Fujikin Inc | High pressure cycle testing device |
| JP2015026752A (en) * | 2013-07-29 | 2015-02-05 | 株式会社日立ハイテクマニファクチャ＆サービス | Transport system |
| CN106969983A (en) * | 2017-05-09 | 2017-07-21 | 绍兴市容纳测控技术有限公司 | A kind of Demolition Tester of Tubing Pressure Resistance |
| CN108593457A (en) * | 2018-05-30 | 2018-09-28 | 中国矿业大学 | A kind of coal petrography high temperature and pressure deformation testing device and test method |
| CN110887738A (en) * | 2019-12-17 | 2020-03-17 | 河南理工大学 | Unsaturated soil collapsibility true triaxial apparatus capable of measuring substrate suction force and test method |
| CN112284877A (en) * | 2020-08-14 | 2021-01-29 | 中国原子能科学研究院 | Inert gas protection additional assembly for endurance test |
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| CN113865984A (en) | 2021-12-31 |
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