CN108827794A - A kind of true triaxial hot test furnace, pilot system and method - Google Patents
A kind of true triaxial hot test furnace, pilot system and method Download PDFInfo
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- CN108827794A CN108827794A CN201810658802.XA CN201810658802A CN108827794A CN 108827794 A CN108827794 A CN 108827794A CN 201810658802 A CN201810658802 A CN 201810658802A CN 108827794 A CN108827794 A CN 108827794A
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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
- G01N3/18—Performing tests at high or low temperatures
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Abstract
The invention discloses a kind of true triaxial hot test furnaces, including furnace body and temperature control system, it further include being arranged in outside furnace body and extending to two opposite X of two opposite Z-direction load bars of the position in burner hearth of the furnace body, position, the two Y-direction load bars opposite to load bar and position, the Z-direction load bar, X match sliding setting to load bar and Y-direction load bar with furnace body wall surface；When load, the opposite end face of the two Z-directions load bar, two X surround pressure chamber to the opposite end face in the opposite end face of load bar and two Y-direction load bars jointly.The present invention, which mainly utilizes heating furnace and divides to independent loads bar, forms three axis hot test furnace of combined type, it being capable of accurate Control experiment temperature, form hot environment stable in high temperature true triaxial test, and the synchronous load of three mutually perpendicular direction dead loads or dynamic load can be completed under high temperature environment, while having many advantages, such as that strong applicability, ease of assembly, sample replacement are convenient.
Description
Technical field
The invention belongs to rock sample heating device technology area more particularly to a kind of true triaxial hot test furnaces, test
System and method.
Background technique
In recent years, the resources such as mineral products, which step into depth and melt, adopts.China has large quantities of mines and enters km or less at present
Mining depth, in the geological environment of deep complexity, the sudden engineering project disaster accidents such as rock burst, plate are split increase, while mining depth
The increase of degree is but also ground temperature rises with the gradient of every 3 DEG C/100m.The influence day of the engineering factors such as High-geotemperature, high-ground stress
Benefit highlights.The behavior of adopting makes high heat rock mass be added unloading to act on by pulsating stress during resource exploitation, and complicated answers masterpiece
The mechanical characteristic of high heat rock mass is made to become considerably complicated with path.It is true in engineering that true triaxial test can simulate rock mass
Stress analyzes intensity and deformation characteristic of the rock mass under three-dimensional stress constraint.For deep rock mass engineering project design and surely
Qualitative analysis has important directive significance.
In recent years, multinomial achievement is achieved in terms of actual triaxial testing apparatus system research, wherein a kind of " rock of Central South University
The independent pathway that stone class material true triaxial test system " (106289995 A of CN) can be realized three directions of rock adds unloading quiet
State or dynamic load can simulate mechanical process of the local sillar in digging process.But test be only limitted at normal temperature into
Row, the engineerings such as deep resource exploitation and geothermal energy exploitation are related to the mechanical property of high heat rock mass more.High temperature rocks are compared to normal
Advising rock interior, there are more thermal induction crack defects, and due to the anisotropy of mineral grains and the difference of coefficient of thermal expansion
Cause rock interior to there is thermal stress relevant to temperature, therefore adds in unloading simulation process carrying out three axle loads, deformation,
The response characteristic of rupture is increasingly complex.In order to further verify Distortion Disciplinarian of the high heat rock mass under complex stress condition and
Mechanism, it is necessary to which the true triaxial test for carrying out indoor High temperature rocks is further probed into.
Currently, existing true triaxial test machine is limited to cold test more, it is also required to for the triaxial test of hot properties rock
It will carry out adding unloading test after the rock natural cooling of high-temperature heating.Although patent 201610848074.X discloses a kind of high temperature
Rock thermal physical property parameter test macro under high pressure, but whole device exist heating it is uneven and can heating temperature it is not high, adapt to
Property difference disadvantage, it is difficult to realize that three axis multipaths under real time temperature add unloader test, cannot really reflect deep high heat rock mass
True mechanical characteristic.
Summary of the invention
The application aims to solve at least one of the technical problems existing in the prior art.For this purpose, an object of the present invention
It is to provide a kind of strong applicability, ease of assembly, sample replacement is convenient and can guarantee the true of rock sample real time temperature load
Three axis hot test furnaces, pilot system and method.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows：
A kind of true triaxial hot test furnace, including furnace body and temperature control system further include being arranged outside furnace body and extending to furnace
Two two opposite X of two opposite Z-direction load bars of position in body burner hearth, position opposite to load bar and position Y-direction load bars,
The Z-direction load bar, X match sliding setting to load bar and Y-direction load bar with furnace body wall surface；When load, the two Z-directions load
The opposite end face of bar, two X surround pressure chamber to the opposite end face in the opposite end face of load bar and two Y-direction load bars jointly.
Further, the Z-direction load bar, X are to being equipped with the circulation for being connected with cooling medium inside load bar and Y-direction load bar
Cooling circuit.
Further, the circulation cooling circuit is in the tubular laying of helical along its axial direction in each load bar.
Further, the furnace body includes furnace body and lid able to turn on or off is located at bell on furnace body, and the X is to load
Bar and Y-direction load bar are laid in the side of furnace body, and the two Z-directions load bar is laid in bottom and the bell of furnace body respectively
On.
Further, the bell is with the furnace body by being fastened.
Further, the bell is equipped with handle.
Further, the furnace body includes open-topped heat-insulation and heat-preservation shell, annular-heating plate and bottom hot plate,
The annular-heating plate and bottom hot plate setting surround burner hearth of the furnace body in the heat-insulation and heat-preservation shell.
Further, each load bar is slidingly fitted on the outer wall of section with furnace body wall surface equipped with refractory ceramics layer；Or
Person is,
Refractory ceramics masonry, each load bar matching sliding are equipped in the furnace body wall surface with each load bar position corresponding position
It is threaded through on corresponding refractory ceramics masonry.
A kind of pilot system, including true triaxial test machine and above-mentioned true triaxial hot test furnace, the hot test furnace peace
On the triaxial test platform of true triaxial test machine and the piston rod of true triaxial test machine hydraulic pump acts on each load bar.
Trial furnace is placed on true triaxial test platform by a kind of test method first using above-mentioned pilot system, rock examination
Sample is placed on the next Z-direction load bar, and adjusts another Z-direction load bar until being bonded with sample, adjusts X to load by sliding
The transverse fit that bar, Y-direction load bar carry out sample is fixed, and is powered on and is made in burner hearth temperature according to pre- by temperature control system
If after heating rate reaches set temperature, opening true triaxial test machine hydraulic pump and carrying out triaxial compression test, respectively separated in test
Formula load bar, which conducts external applied load and synchronizes, is applied to each end face of sample, is tested by testing load load path, is remembered simultaneously
Record test result.
Compared with prior art, the beneficial effects of the present invention are：The present invention mainly utilizes heating furnace and divides to be added to independent
It carries bar and forms three axis hot test furnace of combined type, accurate Control experiment temperature and can also serve as specimen holder, formation high temperature
Stable hot environment in true triaxial test, temperature reach as high as 600 degrees Celsius, and can complete three under high temperature environment mutually
The synchronous load of vertical direction dead load or dynamic load, can be compared with the stress of real simulation deep high heat rock mass, simultaneously
Have many advantages, such as that strong applicability, ease of assembly, sample replacement are convenient.
Detailed description of the invention
Fig. 1 is three axis hot test furnace main views；
Fig. 2 is three axis hot test furnace top views；
Fig. 3 is hot test furnace temperature control system schematic.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Referring to figures 1-3, a kind of true triaxial hot test furnace, including furnace body 1 and temperature control system 2, furnace body 1 can heating temperatures
Range is 20-600 DEG C, further include be arranged in furnace body 1 it is outer and extend to two opposite Z-direction load bars 3 of the position in burner hearth of the furnace body,
Two two opposite X of position opposite to load bar 4 and position Y-direction load bars 5；Wherein, Z-direction load bar 3, X are to load bar 4 and Y
Sliding setting is matched with furnace body wall surface to load bar 5, so as to adjust the spacing of two opposite load bars, X is to, Y-direction and Z-direction
The X of indicates coordinate system Y Z-direction；When load, the both ends opposite both ends of the surface of two Z-direction load bars, two X opposite to load bar
Face and the opposite both ends of the surface of two Y-direction load bars surround the pressure chamber 6 of square shape jointly, and test sample is placed on pressure chamber
In, apply axial load by six faces of each load bar to sample, by adjusting the size of each load bar load, may be implemented
The flexible modulation of sample different directions magnitude of load, while making temperature in burner hearth fast according to default heating by temperature control system 2
Rate reaches set temperature, and the true triaxial for meeting High temperature rocks adds unloaded, and the structure of temperature control system 2 can use such as temperature controller
2-1 adds the structure of temperature sensor 2-2.In the present embodiment the size of pressure chamber 6 can for 50 × 50 × 50 or 100 × 100 ×
100.The present embodiment hot test furnace, by by X to load bar 4, Y-direction load bar 5 and Z-direction load bar 3 towards far from burner hearth direction
When sliding, entire hot test furnace can be used as common heating furnace use.In addition, Z-direction load bar 3 is also used as sample carrying
Platform, trial furnace strong applicability, ease of assembly, sample replacement are convenient.
Preferably, to avoid the temperature of load bar excessively high, in Z-direction load bar 3, X to inside load bar 4 and Y-direction load bar 5
Equipped with the circulation cooling circuit 7 for being connected with cooling medium, circulation cooling circuit 7 connects external cooling medium source, and cooling medium can be with
For cooling water etc..It is envisioned that when circulation cooling circuit 7 is in the tubular laying of helical along its axial direction in each load bar, also
Heat exchange area can be further increased, cooling effect is improved.
Referring to Fig. 3, in another embodiment, furnace body 1 includes that furnace body 1-1 and lid able to turn on or off are located on furnace body 1-1
Bell 1-2, X the side of furnace body 1-1 is laid in load bar 4 and Y-direction load bar 5, two Z-direction load bars 3 are laid in respectively
On the bottom and bell 1-2 of furnace body 1-1.Preferably, bell 1-2 and furnace body 1-1 is fastened by lock 8, in bell
1-2 is equipped with the handle 9 for facilitating lifting bell.
Specifically, furnace body 1-1 includes open-topped heat-insulation and heat-preservation shell 1-1-1, annular-heating plate 1-1-2 and bottom
Heating plate 1-1-3, annular-heating plate 1-1-2 and bottom hot plate 1-1-3 setting surround jointly in heat-insulation and heat-preservation shell 1-1-1
Burner hearth of the furnace body 11.Bell 1-2 includes heat-insulation and heat-preservation outer cover 1-2-1 and the top being arranged in heat-insulation and heat-preservation outer cover 1-2-1 heating
Plate 1-2-2, bell 1-2 lid close when on furnace body 1-1, and top heat plate 1-2-2 is by burner hearth of the furnace body closure of openings, annular-heating
Plate 1-1-2, bottom hot plate 1-1-3 and top heat plate 1-2-2 can use cast copper heating plate, temperature sensor 2-2 setting
In burner hearth 11, temperature sensor 2-2, temperature controller 2-1 and cast copper heating plate are electrically connected composition control circuit, as control electricity
The specific structure on road is that details are not described herein for the prior art.In the present embodiment, using cast copper heating plate to the sample in burner hearth
Heated, pass through temperature sensor 2-2 real time temperature measurement and by temperature controller 2-1 control heating plate generate heat so that trial furnace according to
Default heating rate reaches set temperature.
Preferably, refractory ceramics masonry 10, high temperature resistant pottery are equipped with each load bar position corresponding position in furnace body wall surface
Porcelain masonry 10 is equipped with the duct of perforation worn for load bar sliding, and each load bar matching sliding is threaded through corresponding hole
On road.It in the present embodiment, is oriented to using refractory ceramics masonry and heat-insulated, can prevent heat from transmitting to load bar.Certainly, when
When on the outer wall for section that refractory ceramics layer is arranged in each load bar and furnace body wall surface is slidingly fitted, can equally play prevents heat
Measure the effect transmitted to load bar.
A kind of pilot system, including true triaxial test machine and above-mentioned true triaxial hot test furnace, hot test furnace are mounted on
On the triaxial test platform of true triaxial test machine and the piston rod of true triaxial test machine hydraulic pump acts on each load bar.
Using the test method of above-mentioned pilot system, trial furnace is placed on true triaxial test platform first, rock sample
It is placed on the next Z-direction load bar 3, the transverse fit for carrying out sample to load bar 4, Y-direction load bar 5 by sliding adjustment X is solid
Fixed, sample placement, which should ensure that sample section and load rod end surface is intact, to be contacted, and is closed bell 1-2 and is simultaneously passed through that hasp 8 is locked to close examination
Test furnace, power on, while heating, hydrologic cycle cooling system should be opened, avoid the temperature of load bar excessively high, temperature rise with
And final temperature setting is controlled by temperature sensor 2-2 in burner hearth and temperature controller 2-1, when in burner hearth temperature according to pre-
If after heating rate reaches set temperature, opening true triaxial test machine hydraulic pump and applying load progress triaxial compressions to each load bar
It tests, each separate type load bar, which conducts external applied load and synchronizes, in test is applied to each end face of sample, passes through experiment load and loads road
Diameter is tested, while log.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of true triaxial hot test furnace, including furnace body and temperature control system, it is characterised in that：Further include be arranged outside furnace body and
Extend to two opposite X of two opposite Z-direction load bars of the position in burner hearth of the furnace body, position, two Ys opposite to load bar and position
To load bar, the Z-direction load bar, X match sliding setting to load bar and Y-direction load bar with furnace body wall surface；It is described when load
The opposite end face of two Z-direction load bars, two X surround pressure to the opposite end face in the opposite end face of load bar and two Y-direction load bars jointly
Power room.
2. true triaxial hot test furnace according to claim 1, it is characterised in that：The Z-direction load bar, X are to load bar
And the circulation cooling circuit for being connected with cooling medium is equipped with inside Y-direction load bar.
3. true triaxial hot test furnace according to claim 2, it is characterised in that：The circulation cooling circuit is in each load
It along its axial direction is in the tubular laying of helical in bar.
4. true triaxial hot test furnace according to claim 1-3, it is characterised in that：The furnace body includes furnace sheet
Body and lid able to turn on or off are located at the bell on furnace body, and the X is laid in the side of furnace body to load bar and Y-direction load bar,
The two Z-directions load bar is laid in respectively on the bottom and bell of furnace body.
5. true triaxial hot test furnace according to claim 4, it is characterised in that：The bell passes through with the furnace body
Lock is fastened.
6. true triaxial hot test furnace according to claim 4, it is characterised in that：The bell is equipped with handle.
7. true triaxial hot test furnace according to claim 4, it is characterised in that：The furnace body includes open-topped
Heat-insulation and heat-preservation shell, annular-heating plate and bottom hot plate, the annular-heating plate and bottom hot plate are arranged described heat-insulated
Burner hearth of the furnace body is surrounded in lagging casing.
8. true triaxial hot test furnace according to claim 4, it is characterised in that：Each load bar is mutually slided with furnace body wall surface
The outer wall of dynamic cooperation section is equipped with refractory ceramics layer；Either,
Refractory ceramics masonry is equipped in the furnace body wall surface with each load bar position corresponding position, each load bar matching sliding is worn
On corresponding refractory ceramics masonry.
9. a kind of pilot system, it is characterised in that：Including true triaxial test machine and the described in any item true triaxials of claim 1-8
Hot test furnace, the hot test furnace is mounted on the triaxial test platform of true triaxial test machine and true triaxial test machine hydraulic pump
Piston rod act on each load bar.
10. a kind of test method, using pilot system as claimed in claim 9, it is characterised in that：Trial furnace is placed on first
On true triaxial test platform, rock sample is placed on the next Z-direction load bar, and adjusts another Z-direction load bar until pasting with sample
It closes, is fixed, powered on and by temperature control system to the transverse fit that load bar, Y-direction load bar carry out sample by sliding adjustment X
After system is so that temperature reaches set temperature according to default heating rate in burner hearth, opens true triaxial test machine hydraulic pump and carry out three axis
Compression test each separate type load bar conduction external applied load and is synchronized and is applied to each end face of sample in test, added by testing load
It carries path to be tested, while log.
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| CN201810658802.XA CN108827794A (en) | 2018-06-25 | 2018-06-25 | A kind of true triaxial hot test furnace, pilot system and method |
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| CN201810658802.XA CN108827794A (en) | 2018-06-25 | 2018-06-25 | A kind of true triaxial hot test furnace, pilot system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632462A (en) * | 2019-01-10 | 2019-04-16 | 北京理工大学 | A kind of material constitutive test method under complex stress condition |
| CN110146371A (en) * | 2019-04-26 | 2019-08-20 | 山东科技大学 | Heating and thermal insulation sleeve is loaded for large scale rock direct shear test |
| CN111426575A (en) * | 2020-04-30 | 2020-07-17 | 东北大学 | High-temperature high-stress true triaxial test device and method |
| CN112903738A (en) * | 2021-02-02 | 2021-06-04 | 郑州大学 | Movable multi-surface heating test device |
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Cited By (5)
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|---|---|---|---|---|
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| CN111426575A (en) * | 2020-04-30 | 2020-07-17 | 东北大学 | High-temperature high-stress true triaxial test device and method |
| CN112903738A (en) * | 2021-02-02 | 2021-06-04 | 郑州大学 | Movable multi-surface heating test device |
| CN112903738B (en) * | 2021-02-02 | 2024-02-13 | 郑州大学 | Movable multi-surface heating test device |
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Application publication date: 20181116 |