CN209470976U - A kind of rock center three-axle stretching test system - Google Patents
A kind of rock center three-axle stretching test system Download PDFInfo
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- CN209470976U CN209470976U CN201921053970.2U CN201921053970U CN209470976U CN 209470976 U CN209470976 U CN 209470976U CN 201921053970 U CN201921053970 U CN 201921053970U CN 209470976 U CN209470976 U CN 209470976U
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- pressure
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- booster pump
- axial tension
- test system
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Abstract
The utility model provides a kind of rock center three-axle stretching test system, including shell, pressure indoor, several pairs of axial tension fixtures, axial tension machine, booster pump and fluid reservoir, sample is fixed on seal adhesive surface by high strength bond glue, pressure indoor provides static pressure by booster pump to be pressurized, completely cut off pollution of the booster pump pressurized liquid to avoid pressurized liquid to hydraulic oil by piston, axial tension when stretching rock core is provided by axial tension machine, the heat exchange layer of confining pressure outdoor face setting can also be such that experiment carries out under constant temperature conditions, the utility model is pressurized by setting by setting booster pump, realize the purpose of pressure indoor pressure adjustable, the setting of piston avoids the mixing of pressurized liquid and hydraulic oil.
Description
Technical field
The utility model belongs to rock mechanics the field of test technology, is related to a kind of rock center three-axle stretching test system.
Background technique
Under natural endowment, the earth's crust and engineering rock mass are deformed and destroy under complicated combined stress state.
Rock mass is a kind of geologic body of complexity, and in complicated 3-D stree field, rock mass damage is often as answering for its preservation
Caused by power state changes.The characteristics of strength and deformation research of rock is international rock under different stress and stress path
One of stone mechanics field advanced subject.Nuke rubbish underground disposal, underground energy storage, subterranean carbon dioxide storage, oil exploitation,
Numerous underground rock project country rocks such as deep chamber are due to internal pressure variation, excavation disturbance or earthquake and explosion dynamic loading, place
In different cycles or frequency cycle tension and compression state, therefore measuring the research of rock drawingand pressing fatigue characteristics of strength and deformation is subsurface rock
One of engineering foundation Journal of Sex Research project has highly important theory significance and engineering application value.
At present, the indoor measurement method of Tensile Strength of Rock has uniaxial direct tensile method and indirect pulling method two major classes.Due to straight
Connect tension test generally there are eccentric tension, clamp ends stress concentrate, test specimen difficult processing the problems such as to the accurate of test result
Property affect greatly, so fail always rock mechanics testing field large-scale promotion use, generally use and indirectly split
Pulling method replacement is split, but research shows that is still had not between the indirect methods such as Brazilian tension institute's measured data and the true value of Tensile Strength of Rock
Small deviation, therefore, nearly more than ten years many scholars are attempted to develop the uniaxial direct tensile performance that various uniaxial direct tensile devices carry out rock
Test, achieves a series of research achievements, but these researchs all concentrate on being uniaxially stretched under state substantially.
And for actual underground rock engineering, especially deep underground rock engineering, subject more complex stress
State, some key positions, such as excavate tunnel nearly free face rock mass, after excavating off-load, bear two to compression one to by
The stress state of drawing, and destroyed under this three axis tensile stress state (bi-directional compression, unidirectional tension), therefore, having must
Go deep into Research on Correlative Testing for Precision Apparatus work, 107991176 A of Chinese patent CN discloses a kind of tensile test apparatus of three axis of rock
And its method develops related corollary apparatus and fixture, with three axis uniaxial direct tensiles based on 815 type testing machine of MTS
Function, CN 106546488 A, CN 208672463 U also disclose corresponding three axis tensile test device, current technology is equal
It is to apply axial tension in the state of having confining pressure, but do not consider that rock changes two to pressured state in actual formation
When tensile strength, while not considering influence of the test temperature to experimental result yet.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of rock center three-axle stretching test system, by setting
Additional variable pressure source is stood, the purpose that measurement rock carries out stretching experiment under variable confining pressure is realized.
The technical scheme adopted by the utility model is
A kind of rock center three-axle stretching test system, including shell, pressure indoor, axial tension fixture and axial tension machine, institute
It states pressure indoor to be set in the housing, the axial tension fixture includes that 2 universal joints and 2 seals, the seal pass through ten thousand respectively
The upper link block of Xiang Jieyu pressure indoor is connected with lower link block, and 2 seals are located on same vertical line and its adhesive surface phase up and down
To setting, for the sample after processing by high strength bond gluing knot on seal, the pressure indoor is equipped with hydraulic-oil filling pipe, emptying
Pipe, pressure gauge and forcing pipe, the forcing pipe are equipped with piston and flange, and the pressure indoor bottom is equipped with axial tension machine, use
In offer axial tension；
Booster pump is additionally provided in the shell, the booster pump inlet tube is connected to fluid reservoir, and fluid reservoir is provided with as increasing
The water of hydraulic fluid, the booster pump outlet pipe connects by flange with forcing pipe, booster pump outlet pipe equipped with air cushion tank with
Pressure gauge；
Controller is additionally provided on the shell.
The confining pressure outdoor face is additionally provided with heat exchange layer, and heat exchanger tube is equipped in the heat exchange layer, is equipped with and changes in the shell
Heat pump, the heat exchanger tube import are connect with heat exchange pump discharge, and thermal medium is external constant temperature distilled water.
Further, the forcing pipe equipped with piston is equipped with limited block, and piston mainly avoids liquid used in booster pump
It mixes with the indoor hydraulic oil of confining pressure, while being pressurized by hydraulic principle.
Further, the air cushion tank is equipped with anti-high-pressure gasbag, slowly, is steadily pressurized with realizing.
Further, it is additionally provided with exhaust pipe on the outlet, for the air in discharge outlet pipe.
Further, it is equipped on the booster pump outlet pipe, forcing pipe, hydraulic-oil filling pipe, exhaust pipe and blow-down pipe
Valve.
Further, the tensiometer, booster pump, pressure gauge and axial tension machine are connect with controller.
The beneficial effects of the utility model are:
Booster pump, piston and anti-high-pressure gasbag, which can be realized, is slowly pressurized pressure indoor, and can be during the experiment
Change confining pressure according to demand, can aging rock core according to demand, its tensile strength is measured under rock core fatigue state；Set on forcing pipe
Interior piston avoids liquid used in booster pump and mixes with the indoor hydraulic oil of confining pressure, prevents hydraulic oil contaminated；Heat exchange layer
Setting is so that experiment can carry out under constant temperature conditions.
Detailed description of the invention
Fig. 1: the utility model main structure body schematic diagram；
Fig. 2: booster pump outlet pipe and pressure indoor forcing pipe structural schematic diagram；
Fig. 3: schematic diagram is arranged in heat exchange layer；
In figure, 1 shell, 2 axial tension machines, 3 booster pumps, 4 fluid reservoirs, 5 anti-high-pressure gasbags, 6 air cushion tanks, 7 seals,
8 pressure indoors, 9 universal joints, 10 pressure gauges, 11 blow-down pipes, 12 pistons, 13 controllers, 14 hydraulic-oil filling pipes, 15 samples, 16 limits
Position block, 17 forcing pipes, 18 outlets, 19 exhaust pipes, 20 flanges, link block on 21,22 lower link blocks, 23 heat exchange pumps, 24 heat exchange
Layer, 25 heat exchanger tubes.
Specific embodiment
The utility model is understood and implemented in order to facilitate those of ordinary skill in the art, below with reference to figure and embodiment to this
Utility model is described in further detail, it should be understood that implementation example described herein is only used for describing and explaining practical
It is novel, it is not used to limit the utility model.
A kind of rock center three-axle stretching test system, including shell 1, pressure indoor 8, axial tension fixture and axial tension machine 2,
Pressure indoor 8 is set in shell 1, and axial tension fixture includes 2 universal joint 9 and 2 seals, 7,2 seals 7 respectively by universal
Section 9 is connect with the upper link block 21 of pressure indoor 8 and lower link block 22, and 2 seals 7 are located on same vertical line and on its adhesive surface
Under be oppositely arranged, for the sample 15 after processing by high strength bond gluing knot on seal 7, pressure indoor 8 is equipped with hydraulic-oil filling pipe
14, blow-down pipe 11, pressure gauge 10 and forcing pipe 17, forcing pipe 17 are equipped with piston 12 and flange 20, and 8 bottom of pressure indoor is equipped with axis
To puller system 2；Booster pump 3 is additionally provided in shell 1,3 inlet tube of booster pump is connected to fluid reservoir 4, and 3 outlet 18 of booster pump passes through method
Orchid 20 connect with forcing pipe 17, and 3 outlet 18 of booster pump is equipped with air cushion tank 6 and pressure gauge 10.
Forcing pipe 17 equipped with piston 12 is equipped with limited block 16, and air cushion tank 6 is equipped with anti-high-pressure gasbag 5.Outlet
Exhaust pipe 19 is additionally provided on 18.3 outlet 18 of booster pump, forcing pipe 17, hydraulic-oil filling pipe 14, exhaust pipe 19 and blow-down pipe 11
On be equipped with valve.Be additionally provided with controller 13 on shell 1, tensiometer, booster pump 3, pressure gauge 10 and axial tension machine 2 with control
Device 13 processed connects.8 outer surface of pressure indoor is additionally provided with heat exchange layer 24, is equipped with heat exchanger tube 25, the shell in the heat exchange layer 24
Heat exchange pump 23 is equipped in body 1,25 import of heat exchanger tube and 23 outlet of heat exchange pump connect, and thermal medium is external constant temperature distilled water.
The application method of the utility model are as follows: close the sample 15 processed on seal 7 with high strength bond gluing knot
Pressure indoor 8 is closed, the valve on hydraulic-oil filling pipe 14 and blow-down pipe 11 is opened, filling hydraulic oil to blow-down pipe 11 has hydraulic oil to emit
Out, the valve on hydraulic-oil filling pipe 14 and blow-down pipe 11 is closed；The pressure of the needs of pressure indoor 8 is preset on controller 13
Power, forcing pipe 17 are filled with gas, are filled water in fluid reservoir 4, beaten by 20 connection outlet pipe 18 of flange, confrontation high-pressure gasbag 5
The valve to begin to rehearse on tracheae 19, the valve opened on booster pump 3 to exhaust pipe 19 have water to emerge, the valve are closed, when in pressure
Rise to when setting pressure, booster pump 3 stops working, and can carry out three axis stretching experiments of rock core at this time；After experiment, close
The hydraulic oil in pressure indoor 8 is discharged by hydraulic-oil filling pipe 14 in booster pump 3.If you need to control temperature in reaction process, then prepare
The constant temperature distilled water of preference temperature opens 23 heat exchange of heat exchange pump.
If you need to change the pressure of pressure indoor 8 in experimentation, confining pressure can be reset on controller 13, rock core can also be
Stretching experiment is carried out under the confining pressure of variation after aging a few hours.
The above does not impose any limitation on the present invention, although the utility model is with preferably real
It is disclosed above to apply example, however is not intended to limit the utility model, any person skilled in the art is not departing from this reality
With in new technique aspects, when the technology contents using the disclosure above make a little change or are modified to equivalent variations
Equivalent embodiment, but all contents without departing from technical solutions of the utility model, according to the technical essence of the utility model to
Any simple modification, equivalent change and modification made by upper embodiment, are still within the scope of the technical solutions of the present invention.
Claims (6)
1. a kind of rock center three-axle stretching test system, including shell, pressure indoor, axial tension fixture and axial tension machine, described
Pressure indoor is set in the housing, and the axial tension fixture includes that 2 universal joints and 2 seals, the seal pass through universal respectively
Section is connect with the upper link block of pressure indoor and lower link block, and 2 seals are located on same vertical line and its adhesive surface is opposite up and down
Setting, the sample after processing is by high strength bond gluing knot on seal, which is characterized in that the pressure indoor adds equipped with hydraulic oil
Pipe, blow-down pipe, pressure gauge and forcing pipe are infused, the forcing pipe is equipped with piston and flange, and the pressure indoor bottom is equipped with axial
Puller system；
Booster pump is additionally provided in the shell, the booster pump inlet tube is connected to fluid reservoir, and the outlet of the booster pump passes through
Flange is connect with forcing pipe, and outlet is equipped with air cushion tank and pressure gauge,
Controller is additionally provided on the shell；
The confining pressure outdoor face is additionally provided with heat exchange layer, and heat exchanger tube is equipped in the heat exchange layer, heat exchange pump is equipped in the shell,
The heat exchanger tube import is connect with heat exchange pump discharge, and thermal medium is external constant temperature distilled water.
2. a kind of rock center three-axle stretching test system according to claim 1, which is characterized in that the adding equipped with piston
Pressure pipe is equipped with limited block.
3. a kind of rock center three-axle stretching test system according to claim 1, which is characterized in that the air cushion tank is set
There is anti-high-pressure gasbag.
4. a kind of rock center three-axle stretching test system according to claim 1, which is characterized in that also set on the outlet
There is exhaust pipe.
5. a kind of rock center three-axle stretching test system according to claim 1, which is characterized in that the outlet, pressurization
Valve is equipped on pipe, hydraulic-oil filling pipe, exhaust pipe and blow-down pipe.
6. a kind of rock center three-axle stretching test system according to claim 1, which is characterized in that the booster pump, pressure
Table and axial tension machine are connect with controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921053970.2U CN209470976U (en) | 2019-07-08 | 2019-07-08 | A kind of rock center three-axle stretching test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921053970.2U CN209470976U (en) | 2019-07-08 | 2019-07-08 | A kind of rock center three-axle stretching test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209470976U true CN209470976U (en) | 2019-10-08 |
Family
ID=68095122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921053970.2U Expired - Fee Related CN209470976U (en) | 2019-07-08 | 2019-07-08 | A kind of rock center three-axle stretching test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209470976U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903451A (en) * | 2021-01-27 | 2021-06-04 | 中国石油大学(华东) | Direct tensile test instrument of annular rock sample |
-
2019
- 2019-07-08 CN CN201921053970.2U patent/CN209470976U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903451A (en) * | 2021-01-27 | 2021-06-04 | 中国石油大学(华东) | Direct tensile test instrument of annular rock sample |
| CN112903451B (en) * | 2021-01-27 | 2022-12-16 | 中国石油大学(华东) | Direct tensile test instrument of annular rock sample |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191008 Termination date: 20200708 |