CN105954131B - Measure the experimental rig and test method of high temperature and pressure lower straighttube road ratcheting - Google Patents
Measure the experimental rig and test method of high temperature and pressure lower straighttube road ratcheting Download PDFInfo
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- CN105954131B CN105954131B CN201610439869.5A CN201610439869A CN105954131B CN 105954131 B CN105954131 B CN 105954131B CN 201610439869 A CN201610439869 A CN 201610439869A CN 105954131 B CN105954131 B CN 105954131B
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- 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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- 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
- G01N2203/0005—Repeated or cyclic
-
- 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
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic 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
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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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
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating 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
- G01N2203/02—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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- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
A kind of experimental rig and test method for measuring high temperature and pressure lower straighttube road ratcheting of the present invention, described device includes pedestal, pedestal top is provided with frame, framework upper is provided with cover board, first, second lead screw one end is connect with cover board, the other end is connect with pedestal, first, the first connecting plate is provided on second lead screw, upper chuck is fixed in the first connecting plate, lower chuck is fixed in pedestal, clamping has the second connecting column on lower chuck, second connecting column upper end is provided with support plate, sample to be tested is provided in support plate, temperature-controlled cabinet is disposed around on the outside of sample to be tested, infrared ray stress-strain measurement instrument is installed in temperature-controlled cabinet；The Jiong type connector of the first connecting column of clamping on upper chuck, the first connecting column lower end is held on sample to be tested, and sample to be tested is internally provided with sealing structure.The displacement data of straight pipeline corresponding position is read by displacement sensor, and then obtains mechanical response parameter of the straight pipeline under Cyclic Load, obtains material at high temperature ratcheting data.
Description
Technical field:
The present invention relates to Material mechanics test technical fields, and in particular to a kind of measurement high temperature and pressure lower straighttube road ratchet effect
The experimental rig and test method answered.
Background technique:
In modern industry, many engineering structure aero-engines, aerospace craft, nuclear reactor etc. are in complexity
It works under load and complex environment, many components are in high temperature, high pressure and repeatedly loaded state.Since some of them are held
The accidental destruction of mount components may generate catastrophic consequence, therefore higher and higher to the security requirement of these components, because
And make one of the hot spot for predicting that this kind of system reliability, safety and service life become domestic and foreign scholars' research.However to component
The premise for carrying out life prediction and safety evaluation is to obtain the constitutive equation that can accurately describe material deformational behavior, at present for
The research of material cyclic constitutive model at normal temperature and ratchetting behavior prediction has achieved greater advance, but wants Accurate Prediction material
The ratcheting of material at high temperature is still a very big challenge.
The high temperature ratcheting of material refers to that material is controlled by stress (mean stress is nonzero value) at high operating temperatures
Cyclic Load and the phenomenon that generate plastic strains accumulation, thus the ratchetting behavior of research material at high temperature is correctly predicted
Mechanical response under its high temperature can effectively prevent structural fatigue to fail, and reduce or remit many unnecessary losses.Current Domestic is to material
Expect that the research of high temperature ratcheting is mainly imitated by cold test combination finite element analysis come the ratchet under simulation material high temperature
It answers, but since high temperature circulation hardens the immature of constitutive model theoretical developments, so that the analog result of finite element analysis software is past
It is past with actually have relatively large deviation, it is difficult to the accurate data for obtaining material at high temperature ratcheting, cannot be for material at high operating temperatures
The research of cyclic hardening constitutive model provides data basis, so that the research of material at high temperature ratcheting be made to get into a difficult position.
Therefore, it is necessary to study a kind of experimental rig of more applicable measurement high temperature and pressure lower straighttube road ratcheting and examinations
Proved recipe method, to solve the above problems.
Summary of the invention:
The object of the present invention is to provide a kind of experimental rig for measuring high temperature and pressure lower straighttube road ratcheting and test sides
Method can directly measure mechanical response parameter of the high temperature internal pressure straight pipeline under Cyclic Load, and then accurately obtain material height
Warm ratcheting data.
To achieve the above object, the invention adopts the following technical scheme:
A kind of experimental rig measuring high temperature and pressure lower straighttube road ratcheting provided by the invention, including pedestal, pedestal
Top is provided with frame, and framework upper is provided with cover board, and the first lead screw and second lead screw one end are connect with cover board, the other end and bottom
Seat connects, and is provided with the first connecting plate on first lead screw and the second lead screw, and upper chuck is fixed in first connecting plate, with
The lower part of the corresponding lower chuck of the upper chuck is fixed in the pedestal；Clamping has the second connecting column on the lower chuck, and second
Connecting column upper end is provided with support plate, and two fulcrum bearings are provided in support plate, and sample to be tested is provided between two fulcrum bearings, described
Temperature-controlled cabinet is additionally provided in support plate, the temperature-controlled cabinet is disposed around on the outside of sample to be tested, in the temperature-controlled cabinet
Infrared ray stress-strain measurement instrument is installed；Clamping has the first connecting column, the first affixed Jiong in connecting column lower end on the upper chuck
Type connector, two open end of Jiong type connector are held on sample to be tested, and the sample to be tested is internally provided with sealing knot
Structure, the sealing structure include: seal head, and the seal head is separately positioned on sample to be tested both ends, and seal head is toward each other
One end be respectively arranged with connector, connecting rod is connected between two connectors, the other end of seal head is provided with fastener,
The outer rim of the fastener is overlapped with the outer rim of sample to be tested, and first through hole is opened up on seal head, to fill out into sample to be tested
Filling liquid pressure oil.
The connector is fastened by two connecting tiles, and two connecting tiles are far from being provided between one end of seal head
Two connecting plates, the both ends of connecting tile are respectively facing and are provided with first boss and second boss each other, the first boss clamping
In in the groove opened up on seal head, the second boss is located at side of second connecting plate far from seal head, to block institute
The second connecting plate is stated, the connection boom end passes through second connecting plate, and nut is arranged in connection boom end, to even
Extension bar is fixed.
The Jiong type connector includes third connecting plate, and there are two third connecting columns for setting below third connecting plate, described
The lower end of third connecting column is held on the sample to be tested, and third connecting column lower part is plugged in the temperature-controlled cabinet
In.
The temperature-controlled cabinet is fastened by the first cabinet and the second cabinet, and first cabinet includes first shell,
It is arranged on the upper side wall of first cabinet and lower wall fluted, is provided on left side wall and right side wall semicircle logical
Hole, second cabinet includes second shell, is provided with third boss on the upper side wall of second cabinet and lower wall,
Semi-circular through hole is provided on left side wall and right side wall, first cabinet and the second cabinet pass through the groove matched and third
Boss fastening is integrated, and the sample to be tested passes through the channel that the two halves circular through hole matched is formed and is plugged in the temperature control
In case processed, it is provided with multiple second through-holes on the third boss, is arranged in the second through-hole close to one end of the second cabinets cavity
There is high temp glass, infrared ray stress-strain measurement instrument is installed in the second through-hole, in the first shell and second shell
It is interlocked on face and is embedded with flexible graphite layer, be filled with Heat preservation material inside first shell and second shell.
Sealing ring is provided between the seal head and sample to be tested.
The first through hole is stepped hole, and stepped hole is macropore far from connecting rod one end, and the macropore inner wall is provided with spiral shell
Line, for being threadedly coupled hydraulic oil conveyance conduit.
The frame inner wall is equipped with slideway, and first connecting plate is slided along the slideway.
Gasket, the outer rim of the outer rim of the gasket and the sample to be tested are additionally provided between the fastener and seal head
It is overlapped.
The fastener is screw or pin.
The test that straight pipeline is measured using the experimental rig of said determination high temperature and pressure lower straighttube road ratcheting
Method, the specific steps of which are as follows:
Step 1: one end of petroleum pipeline and sealing structure is connected, the external transparent drain mast of the sealing structure other end passes through
Petroleum pipeline is passed through hydraulic oil into sealing structure, until the air inside emptying sample to be tested, continues to lead in opposite sealing structure
Enter hydraulic oil, makes to reach predetermined pressure inside test specimen to be measured, the infrared ray stress-strain measurement that will be installed in temperature-controlled cabinet hole
Instrument is connected to computer by lead；
Step 2: start-up temperature control cabinet, makes temperature rise to predetermined temperature, and keep stable；
Step 3: the motor that the first, second lead screw of starting is external, driving the first, second lead screw rotation, drive the first connection
Plate is mobile in the first, second lead screw, and then drives upper chuck mobile, and the first connecting column applies circulation moment of flexure to sample to be tested and carries
Lotus, the strain data of sample to be tested corresponding position is read by infrared ray stress-strain measurement instrument, and sends data to computer,
Obtain the strained situation of sample to be tested interior point；
Step 4: closing motor, closing temperature control cabinet stops being passed through to sealing structure after temperature is reduced to room temperature
Hydraulic oil completes entire experiment.
In the first step, after being passed through hydraulic oil to sealing structure, gas is not observed in transparent drain mast within continuous 5 minutes
Bubble, both determines to have been drained off the air inside sample to be tested.
In the first step, the connector is fastened by two connecting tiles, the one end of two connecting tiles far from seal head
Between be provided with the second connecting plate, the both ends of connecting tile are respectively facing and are provided with first boss and second boss each other, described
First boss is connected in the groove opened up on seal head, and the second boss is located at one of the second connecting plate far from seal head
Side, to the second connecting plate described in block, the connection boom end passes through second connecting plate, and in connection boom end setting
Nut, connecting rod to be fixed.
In second step, the temperature-controlled cabinet is fastened by the first cabinet and the second cabinet, the first cabinet packet
First shell is included, is arranged on the upper side wall of first cabinet and lower wall fluted, is arranged on left side wall and right side wall
There is semi-circular through hole, second cabinet includes second shell, is provided on the upper side wall of second cabinet and lower wall
Semi-circular through hole, first cabinet and the second cabinet are provided on third boss, left side wall and right side wall by matching
Groove and third boss fastening be integrated, the sample to be tested passes through the channel that the two halves circular through hole that matches is formed and plugs
In the temperature-controlled cabinet, multiple second through-holes are provided on the third boss, in the second through-hole in the second cabinet
One end of chamber is provided with high temp glass, infrared ray stress-strain measurement instrument is equipped in the second through-hole, in the first shell
With on the face that is interlocked of second shell be embedded with flexible graphite layer, when preventing temperature change, shell generate plastic deformation and cause
It damages, Heat preservation material is filled with inside first shell and second shell, to carry out heating and temperature adjustment temperature control.
The present invention measure high temperature and pressure lower straighttube road ratcheting experimental rig and test method the utility model has the advantages that passing through
Infrared ray stress-strain measurement instrument reads the strain data of high temperature internal pressure straight pipeline corresponding position, and then obtains straight pipeline and recycling
Mechanical response parameter under load effect, obtains material at high temperature ratcheting data, passes through the sealing structure and temperature control of setting
Case processed makes device can be with Accurate Determining in different pressures and temperature conditions lower straighttube road ratcheting data, and inside straight pipeline
It is forced through the connecting rod balance of sealing structure, so that device is more stable, the flexible graphite layer being arranged on temperature-controlled cabinet can
It causes to damage in temperature change, to prevent shell from generating plastic deformation.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram for measuring the experimental rig of high temperature and pressure lower straighttube road ratcheting；
Fig. 2 is the structural schematic diagram of sealing structure；
Fig. 3 is the structural schematic diagram of support plate；
Fig. 4 is the structural schematic diagram for enclosing the support plate equipped with temperature-controlled cabinet；
Fig. 5 is the structural schematic diagram of the first cabinet of incubator；
Fig. 6 is the structural schematic diagram of the second cabinet of incubator；
1- pedestal, 2- frame, 3- cover board, the first lead screw of 4-, the second lead screw of 5-, the first connecting plate of 6-, 7- slideway block on 8-
Disk, the first connecting column of 9-, 10- Jiong type connector, 11- lower chuck, the second connecting column of 12-, 13- support plate, 14- fulcrum bearing, 15-
Sample to be tested, 17- temperature-controlled cabinet, 18- seal head, 19- sealing ring, 20- connecting tile, 21- first boss, 22- second are convex
Platform, the second connecting plate of 23-, 24- connecting rod, 25- nut, 26- first through hole, 27- macropore, 28- third connecting plate, 29- third
Connecting column, the first cabinet of 30-, 31- first shell, 32- groove, 33- semi-circular through hole, the second cabinet of 34-, 35- second shell,
36- third boss, the second through-hole of 37-, 38- screw, 39- gasket.
Specific embodiment:
Below with reference to embodiment, the present invention is described in further detail.
According to Fig. 1, a kind of experimental rig measuring high temperature and pressure lower straighttube road ratcheting, including pedestal 1, pedestal
1 top is provided with frame 2, and 2 top of frame is provided with cover board 3, and the first lead screw 4 and 5 one end of the second lead screw are connect with cover board 3, separately
One end is connect with pedestal 1, and the first connecting plate 6 is provided on first lead screw 4 and the second lead screw 5, and 2 inner wall of frame is equipped with
The both ends of slideway 7, the first connecting plate 6 are inlaid in slideway 7, so that the first connecting plate 6 is slided along the slideway 7, upper chuck 8 is solid
It is connected to first connecting plate 6, upper chuck 8 moves up and down under the drive of the first connecting plate 6, corresponding with the upper chuck 8
The lower part of lower chuck 11 is fixed in the pedestal 1, remains stationary relative to pedestal 1；Clamping has the second company on the lower chuck 11
Column 12 is connect, 12 upper end of the second connecting column is provided with support plate 13, as shown in Figure 3 and Figure 4, two fulcrum bearings is provided in support plate 13
14, sample to be tested 15 is provided between two fulcrum bearings 14, the sample to be tested 15 is standard sample, is also set in the support plate 13
It is equipped with temperature-controlled cabinet 17, the temperature-controlled cabinet 17 is disposed around 15 outside of sample to be tested, installation in the temperature-controlled cabinet 17
There is infrared ray stress-strain measurement instrument；Clamping has the first connecting column 9, the affixed Jiong type in 9 lower end of the first connecting column on the upper chuck 8
Connector 10, described 10 liang of open ends of Jiong type connector are held on sample to be tested 15, in the present embodiment, the Jiong type connection
Part 10 includes third connecting plate 28, and there are two third connecting column 29, the third connecting columns 29 for setting below third connecting plate 28
Lower end be held on the sample to be tested 15,19 lower part of third connecting column is plugged in the temperature-controlled cabinet 17,
One connecting column 9 moves up and down under the drive of upper chuck 8, recycles to be applied by Jiong type connector 10 to sample to be tested 15
Load, the sample to be tested 15 are internally provided with sealing structure, to guarantee that there is good leakproofness inside sample to be tested,
During test, so that the hydraulic oil that sample to be tested inside stream excess pressure is constant.
As shown in Fig. 2, the sealing structure includes: seal head 18, the seal head 18 is separately positioned on sample to be tested 15
Both ends, are provided with sealing ring 19 between seal head 18 and sample to be tested 15, the one end of seal head 18 toward each other is respectively set
There is connector, connecting rod 24 is connected between two connectors, connector is fastened by two connecting tiles 20, two connecting tiles
The second connecting plate 23 is provided between 20 one end far from seal head 18, the both ends of connecting tile 20 are respectively facing to be provided with each other
First boss 21 and second boss 22, the first boss 21 are connected in the groove opened up on seal head 18, and described second is convex
Platform 22 is located at the second side of the connecting plate 23 far from seal head 18, to the second connecting plate 23 described in block, the connecting rod 24
End passes through second connecting plate 23, and nut 25 is arranged in 24 end of connecting rod, connecting rod 24 to be fixed,
In other embodiments, can also directly 24 end of connecting rod be welded or is threadedly coupled and be fixed on second connecting plate 23
On, the other end of seal head 18 is provided with fastener, the outer rim of the fastener is overlapped with the outer rim of sample to be tested, in this reality
It applies in example, fastener is screw 38, and gasket 39 is additionally provided between screw 38 and seal head, and the outer rim of gasket 39 and institute
The outer rim for stating sample to be tested 15 is overlapped, and first through hole 26 is opened up on seal head 18, hydraulic to fill into sample to be tested 15
Oil, in the present embodiment, first through hole 26 are stepped hole, and stepped hole is macropore 27 far from connecting rod one end, in the macropore 27
Wall is provided with screw thread, for being threadedly coupled hydraulic oil conveyance conduit.
As shown in Figure 5 and Figure 6, the temperature-controlled cabinet 17 is fastened by the first cabinet 30 and the second cabinet 34, is formed
Enclosed construction, the first cabinet 30 and the second cabinet 34 are locked by hasp, so that incubator is convenient for disassembly and assembly, hasp itself
It is made of alkali-free glass fibre material, there is extremely strong tension, will not be broken off easily, and it also has resistance to vulcanize, smokelessly
The advantages that nontoxic, good insulating, if adding silica gel content in its ingredient, it can more reinforce the performance of its safety and environmental protection, it is described
First cabinet 30 includes first shell 31, fluted 32 is arranged on the upper side wall of first cabinet 30 and lower wall, a left side
Semi-circular through hole 33 is provided on side wall and right side wall, second cabinet 34 includes second shell 35, in second cabinet
It is provided with third boss 36 on 34 upper side wall and lower wall, semi-circular through hole 33, institute are provided on left side wall and right side wall
It states the first cabinet 30 and the second cabinet 34 passes through the groove 32 matched and the fastening of third boss 36 is integrated, the sample to be tested
15, which pass through the channel that the two halves circular through hole 33 matched is formed, is plugged in the temperature-controlled cabinet 17, the third boss 36
On be provided with multiple second through-holes 37, be provided with high temp glass (not close to one end of 34 inner cavity of the second cabinet in the second through-hole 37
Diagram), infrared ray stress-strain measurement instrument is installed in the second through-hole 37, in the first shell 31 and second shell 35
It is interlocked on face embedded with flexible graphite layer, when preventing temperature change, shell generates plastic deformation and causes to damage, soft graphite
Be by the high-carbon graphite of natural squamous, after special chemical and physical treatment, pure graphite product made of processing and refining, completely
Ground remains outside the good characteristic of natural flaky graphite, more main to have flexibility, resilience, corrosion-resistant, high pressure resistant, resistance to spoke
It the good characteristics such as penetrates, is thermally conductive, being filled with Heat preservation material inside first shell 31 and second shell 35, risen to reach
Temperature, the purpose of temperature adjustment and temperature control, which woven by low-sulphur expanded graphite line, and liner cotton has to enhance intensity
Extremely low coefficient of friction, will not wear pump shaft and valve rod, and have good thermal conductivity, resistance to chemical corrosion and very high time
Elasticity is suitable for all kinds of solvents such as water, seawater, can use at a temperature of -200~600 DEG C, and limitation pressure is 20MPa.
The test that straight pipeline is measured using the experimental rig of said determination high temperature and pressure lower straighttube road ratcheting
Method, the specific steps of which are as follows:
Step 1: device is connected to hydraulic system, the hydraulic system includes hydraulic pump and fuel tank, specifically, will
Hydraulic pump is connected to by petroleum pipeline with the macropore 27 on the seal head 18 of sealing structure one end, and the oil transportation in 18 end of seal head
Pressure gauge one is installed on pipe, fuel tank is connected by transparent drain mast and the macropore 27 on the seal head 18 of the sealing structure other end
It is logical, pressure gauge two is installed on the transparent drain mast of 18 end of seal head, the petroleum pipeline and transparent drain mast with it is corresponding
Macropore is threadedly coupled, so that connection is more stable, is connected to, is provided on pipeline hydraulic by pipeline between hydraulic pump and fuel tank
Valve is passed through hydraulic oil into sealing structure by petroleum pipeline, until the air inside emptying sample to be tested 15, i.e., 5 minutes continuous
Bubble is not observed in transparent drain mast, has both determined to have been drained off the air inside sample to be tested 15, continues opposite sealing knot
It is passed through hydraulic oil in structure, makes to reach predetermined pressure inside test specimen to be measured, pressure value is read by pressure gauge one and pressure gauge two
Average value obtains, and the infrared ray stress-strain measurement instrument installed in temperature-controlled cabinet hole is connected to computer by lead, defeated
Hydraulic pump and fuel tank are provided between oil pipe and transparent drain mast, hydraulic oil feeds petroleum pipeline by hydraulic pump in fuel tank, in turn
It is passed through in sealing structure, is back in fuel tank by transparent drain mast, by adjusting the aperture of hydraulic valve, changed hydraulic in petroleum pipeline
The flow of oil, and then adjust test block internal pressure size；
Meanwhile the one end of two seal heads 18 of sealing structure toward each other is respectively arranged with connector, two connectors
Between be connected with connecting rod 24, connector is fastened by two connecting tiles 20, hydraulic when feeding hydraulic oil by petroleum pipeline
Oil enters two connecting tiles 20 by first through hole 26 and fastens in the cavity formed, then by connecting tile 20 and sample to be tested 15 it
Between gap flow into sample to be tested 15 inner cavity in, and the hydraulic oil of 15 inner cavity of sample to be tested connecting tile 20 is generated it is outside
Thrust is provided with the second connecting plate 23, the both ends of connecting tile 20 between two one end of connecting tile 20 far from seal head 18
It is respectively facing and is provided with first boss 21 and second boss 22 each other, the first boss 21 is connected in be opened up on seal head 18
In groove, the second boss 22 is located at the second side of the connecting plate 23 far from seal head 18, to the second connection described in block
Plate 23,24 end of connecting rod pass through second connecting plate 23, and the other end of seal head 18 is provided with screw 38, and
Gasket 39 is additionally provided between screw 38 and seal head, and the outer rim of gasket 39 is overlapped with the outer rim of the sample to be tested 15,
Before reaching predetermined pressure inside test specimen to be measured, hydraulic oil fills the inside of full sample to be tested 15, and sealing structure is in hydraulic oil
Guaranteed sealing under the action of the screw 38 of 18 end symmetric of seal head setting and gasket 39 by outside thrust under effect
Structure is fixed on always inside sample to be tested 15, is kept stress balance, 24 end of connecting rod is provided with nut 25, to connecting rod
24 are fixed, and after reaching predetermined pressure, 15 internal pressure of sample to be tested is stablized, because of the design symmetry of sealing structure, on
Thrust is stated finally by 23 shared of nut 25 and the second connecting plate, and then guarantees the stress balance and leakproofness of sealing structure；
Step 2: start-up temperature control cabinet 17, the Heat preservation material filled by the enclosure interior of temperature-controlled cabinet 17,
So that temperature is risen to predetermined temperature, and keep stable, temperature value can be by the temperature sensor that is mounted on temperature-controlled cabinet 17
Reading obtains；
Step 3: the motor that the first, second lead screw of starting is external, driving the first, second lead screw rotation, drive the first connection
Plate 6 is mobile in the first, second lead screw, and then drives upper chuck 8 mobile, the first connecting column 9 under the drive of upper chuck 8 on move down
It is dynamic, to apply circulation bending load to sample to be tested 15 by Jiong type connector 10, then surveyed by infrared ray ess-strain
It measures instrument and reads the strain data of 15 corresponding position of sample to be tested, and send data to computer, it is each to obtain 15 inside of sample to be tested
The strained situation of point；
The infrared ray stress-strain measurement instrument mainly includes two parts, a part of polarized light-emitting, another part
It is then capturing material interference fringe generated above, the dependent variable of sample to be tested corresponding position is then measured using photoelastic method
To carry out stress-strain test using the birefringence effect of material according to, the photoelastic method, as epoxy resin etc it is each to
The amorphous material of the same sex will not generate birefringent phenomenon in its natural state, but generate stress when it is acted on by load
When, optical anisotropy will be shown as crystal, generate birefringent phenomenon, and after unloading, it is each that material restores optics again
To the same sex.Here it is so-called temporary birefrigent effects, specifically, being by the surface of sample to be tested 15 in the present embodiment
On, with corresponding position measured by infrared stress-strain measurement instrument, handled using light patch, after start-up temperature control cabinet 17,
Under the action of cyclic loading, the striped of interference will be generated, infrared stress-strain measurement instrument acquisition striped can analyze this
The ess-strain of position；
Step 4: closing motor, closing temperature control cabinet 17 stops logical to sealing structure after temperature is reduced to room temperature
Enter hydraulic oil, completes entire experiment.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Pipe is described the invention in detail referring to above-described embodiment, it should be understood by those ordinary skilled in the art that: still may be used
With modifications or equivalent substitutions are made to specific embodiments of the invention, and repaired without departing from any of spirit and scope of the invention
Change or equivalent replacement, should all cover in present claims range.
Claims (8)
1. a kind of experimental rig for measuring high temperature and pressure lower straighttube road ratcheting characterized by comprising pedestal, on pedestal
Portion is provided with frame, and framework upper is provided with cover board, and the first lead screw and second lead screw one end are connect with cover board, the other end and pedestal
It connects, is provided with the first connecting plate on first lead screw and the second lead screw, upper chuck is fixed in first connecting plate, with institute
The lower part for stating the corresponding lower chuck of upper chuck is fixed in the pedestal；Clamping has the second connecting column on the lower chuck, and second connects
It connects column upper end and is provided with support plate, two fulcrum bearings are provided in support plate, sample to be tested, the branch are provided between two fulcrum bearings
Temperature-controlled cabinet is additionally provided on fagging, the temperature-controlled cabinet is disposed around on the outside of sample to be tested, peace in the temperature-controlled cabinet
Equipped with infrared ray stress-strain measurement instrument；Clamping has the first connecting column, the affixed Jiong type in the first connecting column lower end on the upper chuck
Connector, two open end of Jiong type connector are held on sample to be tested, and the sample to be tested is internally provided with sealing structure,
The sealing structure includes: seal head, and the seal head is separately positioned on sample to be tested both ends, seal head toward each other one
End is respectively arranged with connector, connecting rod is connected between two connectors, the other end of seal head is provided with fastener, described
The outer rim of fastener is overlapped with the outer rim of sample to be tested, and first through hole is opened up on seal head, to the filling liquid into sample to be tested
Pressure oil；
The connector is fastened by two connecting tiles, and two connecting tiles are far from being provided with the second company between one end of seal head
Fishplate bar, the both ends of connecting tile are respectively facing and are provided with first boss and second boss each other, and the first boss is connected in close
In the groove opened up on end socket, the second boss is located at side of second connecting plate far from seal head, to described in block
Two connecting plates, the connection boom end passes through second connecting plate, and nut is arranged in connection boom end, to connecting rod
It is fixed；
The Jiong type connector includes third connecting plate, and there are two third connecting column, the thirds for setting below third connecting plate
The lower end of connecting column is held on the sample to be tested, and third connecting column lower part is plugged in the temperature-controlled cabinet.
2. the experimental rig of measurement high temperature and pressure lower straighttube road ratcheting according to claim 1, it is characterised in that: institute
It states temperature-controlled cabinet to be fastened by the first cabinet and the second cabinet, first cabinet includes first shell, described first
It is arranged fluted on the upper side wall and lower wall of cabinet, is provided with semi-circular through hole on left side wall and right side wall, described second
Cabinet includes second shell, is provided with third boss, left side wall and the right side on the upper side wall of second cabinet and lower wall
Semi-circular through hole is provided on side wall, first cabinet and the second cabinet pass through the groove matched and third boss fastening is
One, the sample to be tested pass through the channel that the two halves circular through hole matched is formed and are plugged in the temperature-controlled cabinet, institute
It states and is provided with multiple second through-holes on third boss, one end of the second cabinets cavity is provided with high temperature glass in the second through-hole
Glass is equipped with infrared ray stress-strain measurement instrument in the second through-hole, in the face that is interlocked of the first shell and second shell
On be embedded with flexible graphite layer, Heat preservation material is filled with inside first shell and second shell.
3. the experimental rig of measurement high temperature and pressure lower straighttube road ratcheting according to claim 1, it is characterised in that: institute
Stating first through hole is stepped hole, and stepped hole is macropore far from connecting rod one end, and the macropore inner wall is provided with screw thread, is used for screw thread
Connect hydraulic oil conveyance conduit.
4. the experimental rig of measurement high temperature and pressure lower straighttube road ratcheting according to claim 1, it is characterised in that: institute
Stating fastener is screw or pin, and gasket is additionally provided between the fastener and seal head, the outer rim of the gasket
It is overlapped with the outer rim of the sample to be tested.
5. being surveyed using the experimental rig of measurement high temperature and pressure lower straighttube road ratcheting described in claim 1 to straight pipeline
Fixed test method, it is characterised in that: specific step is as follows:
Step 1: one end of petroleum pipeline and sealing structure is connected, the external transparent drain mast of the sealing structure other end passes through oil transportation
Pipe is passed through hydraulic oil into sealing structure, until the air inside emptying sample to be tested, continues to be passed through liquid in opposite sealing structure
Pressure oil makes to reach predetermined pressure inside test specimen to be measured, and the infrared ray stress-strain measurement instrument installed in temperature-controlled cabinet hole is led to
It crosses lead and is connected to computer；
Step 2: start-up temperature control cabinet, makes temperature rise to predetermined temperature, and keep stable；
Step 3: the motor that the first, second lead screw of starting is external, driving the first, second lead screw rotation, drive the first connecting plate to exist
First, second lead screw is mobile, and then drives upper chuck mobile, and the first connecting column applies circulation bending load to sample to be tested, leads to
It crosses infrared ray stress-strain measurement instrument and reads the strain data of sample to be tested corresponding position, and send data to computer, obtain
The strained situation of sample to be tested interior point；
Step 4: closing motor, closing temperature control cabinet stops being passed through to sealing structure hydraulic after temperature is reduced to room temperature
Oil completes entire experiment.
6. according to the method described in claim 5, it is characterized by: in the first step, after being passed through hydraulic oil to sealing structure, connecting
Bubble is not observed within continuous 5 minutes in transparent drain mast, that is, determines to have been drained off the air inside sample to be tested.
7. according to the method described in claim 5, it is characterized by: in the first step, the connector is by two connecting tile buttons
It closes, two connecting tiles are respectively facing far from the second connecting plate, the both ends of connecting tile are provided between one end of seal head
It is provided with first boss and second boss each other, the first boss is connected in the groove opened up on seal head, and described second
Boss is located at side of second connecting plate far from seal head, and to the second connecting plate described in block, the connection boom end is passed through
Second connecting plate, and nut is set in connection boom end, connecting rod to be fixed.
8. according to the method described in claim 5, it is characterized by: the temperature-controlled cabinet is by the first cabinet in second step
It is fastened with the second cabinet, first cabinet includes first shell, on the upper side wall and lower wall of first cabinet
It is arranged fluted, semi-circular through hole is provided on left side wall and right side wall, second cabinet includes second shell, described
It is provided with third boss on the upper side wall and lower wall of second cabinet, is provided with semi-circular through hole on left side wall and right side wall,
First cabinet and the second cabinet pass through the groove matched and third boss fastening is integrated, and the sample to be tested passes through phase
The channel that the two halves circular through hole of cooperation is formed is plugged in the temperature-controlled cabinet, and multiple the are provided on the third boss
Two through-holes are provided with high temp glass close to one end of the second cabinets cavity in the second through-hole, are equipped in the second through-hole infrared
Uniaxial stress strain gauge is embedded with flexible graphite layer on the face that is interlocked of the first shell and second shell, prevents temperature
When degree variation, shell generates plastic deformation and causes to damage, and Heat preservation material is filled with inside first shell and second shell
Material, to carry out heating and temperature adjustment temperature control.
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| CN108254173B (en) * | 2018-01-30 | 2024-03-01 | 武汉海王机电工程技术有限公司 | Ultrahigh pressure test device |
| CN110470547B (en) * | 2018-05-10 | 2023-05-23 | 中国电力科学研究院有限公司 | Testing device for wire monofilaments |
| US20220178801A1 (en) * | 2020-12-04 | 2022-06-09 | Bell Textron Inc. | Controlled environment composite testing system |
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