CN108169006A - A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project - Google Patents
A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project Download PDFInfo
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- CN108169006A CN108169006A CN201810033990.7A CN201810033990A CN108169006A CN 108169006 A CN108169006 A CN 108169006A CN 201810033990 A CN201810033990 A CN 201810033990A CN 108169006 A CN108169006 A CN 108169006A
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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
- 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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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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
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of Hopkinson pressure bar confining pressure automatic control systems for deep rock mass engineering project, including automatic pressurizing device, confining pressure device and pipe-line system, the automatic pressurizing device includes digital pressure gauge, oil sources, booster pump, frequency-variable controller, pressure sensor and vacuum tank, confining pressure device includes confining pressure cylinder body, pressure chamber, rubber case and automatic exhaust steam valve, and pipe-line system includes oil inlet pipe, flowline, inlet valve and delivery valve.The present invention realizes the transformation for being loaded into from manually confining pressure and automatically controlling confining pressure loading, and the operating procedure for being opened manually and closing vent valve is saved by automatic exhaust steam valve；Automatic pressurizing device can Automatic-boosting to specified confining pressure and keep stablize；The present invention has the characteristics that working efficiency is high, experimental precision is high, easy to operate, can solve the problems such as existing plus confining pressure system can not simulate experimental situation under deep rock mass engineering project high confining pressure state, experimentation needs more people to operate simultaneously, manual pressure difficulty maintenance pressure stability.
Description
Technical field
The present invention relates to deep rock mass engineering projects（Under high-stress state）Dynamic compression properties technical field of measurement and test, specifically
It is a kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project.
Background technology
Blasting Excavation with it efficiently, it is economical, quick the characteristics of be widely used in rock mass inrush during tunneling, while with
Underground space development depth is continuously increased, and the engineering practice for being related to deep rock mass is more and more.Therefore, deep rock mass tunnel
Nearby rock mass is in the environment of high-ground stress and frequent blast disturbance synergy face in work progress, serious threat
The stability of engineering rock mass.
In order to study mechanical property of the Rock Mass under blast disturbance effect, it is proposed that a series of experimental provision,
Middle Hopkinson pressure bar is current research rock mass materials mechanical property under blasting impact load action most widely used in the world
The experimental provision of energy.Hopkinson pressure bar has the advantages that simple in structure, easy to operate, is material under research one-dimensional stress state
The recommendation apparatus of dynamic mechanical.In view of engineering, the materials such as rock not only by axial dynamic load, are also enclosed in practice
Pressure acts on, and especially in the deep rock mass dynamic mechanical under studying high-stress state, uniaxial stress state cannot meet
Requirement of engineering, therefore dynamic characteristics of the research material under three-dimensional stress constraint become inevitable.
At present, confining pressure loading system is as shown in Figure of description 2 used by Hopkinson pressure bar, by confining pressure cylinder body, pressure
Power chamber, rubber case, pressure gauge, vent valve, entry/exit oil pipe, pressue device composition.Wherein pressue device is hydraulic hand-pump, into/
Flowline is connected with hydraulic hand-pump, and positioned at confining pressure cylinder base, vent valve is located at confining pressure cylinder body top.Blasting impact is tested
Specific operation process it is as follows：Sample is placed between incident bar and transmission bar first, and sample, incidence are entangled with confining pressure device
Bar and transmission bar；Then vent valve is opened, the handwheel on hydraulic hand pump is screwed, shakes the handle of hydraulic hand pump by liquid
Pressure oil is pressed by oil inlet pipe in pressure chamber, when hydraulic oil overflows soon in pressure chamber, closes vent valve；Continue swinging handle into
Row pressurization is to achieve the effect that apply confining pressure, and after pressure gauge stabilization, opening gas-filled switching tube makes punch hit incident bar；Experiment knot
Shu Hou closes gas-filled switching tube, the handwheel on hydraulic hand pump is unscrewed, hydraulic oil is flowed back by flowline in hydraulic hand-pump
Release is completed, finally takes out sample.
Existing confining pressure loading system is primarily present following shortcoming for the simulation of deep rock mass engineering project：1）Confining pressure loading range
For 0-60MPa, lack simulation deep rock mass high confining pressure（60-130MPa）Experimental situation under state；2）Automation degree of equipment
Low, into pressure chamber, pressurization need to open vent valve manually during the experiment, need to will deflate again when hydraulic oil overflows cylinder body soon
Valve is closed, and the handle for then shaking hydraulic hand pump pressurizes, and above-mentioned experimentation needs more people to be carried out at the same time operation；3）Fortune
It is pressurizeed with hydraulic hand pump, pressure value can slowly reduce, so need to be ready to swinging handle and then keep required pressure,
However manually pressurization causes to generate deviation between actual pressure and required pressure, greatly drop it is difficult to ensure that pressure is constant
Low experimental precision.
Invention content
It is automatically controlled the purpose of the present invention is to provide a kind of Hopkinson pressure bar confining pressure for deep rock mass engineering project and is
System, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides following technical solution：
A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project, including automatic pressurizing device, confining pressure
Device and pipe-line system, the automatic pressurizing device include digital pressure gauge, oil sources, booster pump, frequency-variable controller, pressure sensing
Device and vacuum tank and automatic pressurizing device is connected with power supply, pressure sensor and digital pressure gauge are installed on oil inlet pipe simultaneously
And pressure sensor is electrically connected with digital pressure gauge, booster pump is connected with oil sources and booster pump be located at oil sources and vacuum tank it
Between, pressure sensor and booster pump are connected by cable with frequency-variable controller, and confining pressure device includes confining pressure cylinder body, pressure chamber, rubber
Leather sheath and automatic exhaust steam valve, automatic exhaust steam valve are located at confining pressure cylinder body top, and pipe-line system includes oil inlet pipe, flowline, inlet valve
And delivery valve, the oil inlet pipe connect top and the automatic pressurizing device of confining pressure cylinder body respectively, the flowline connects respectively to be enclosed
Inlet valve and delivery valve are respectively arranged on the bottom of cylinder pressure body and automatic pressurizing device, oil inlet pipe and flowline.
As further embodiment of the present invention：Confining pressure cylinder body, pressure chamber and rubber case composition confining pressure device main body and
Confining pressure cylinder body, pressure chamber and rubber case are set gradually from outside to inside.
The operating method of the Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project, specific steps
It is as follows：
Step 1, whether checking experiment instrument each section is intact, and rock sample is placed on incident bar and transmission by confining pressure cylinder body
Blend rubber set entangles sample between bar, ensures incident bar, sample and transmission bar in the same horizontal line, and Self-pressurizing agri is filled
It puts and powers on；
Step 2 closes delivery valve, opens inlet valve, uses pressure limit needed for frequency-variable controller setting large ground pressure
（60-130MPa）；
Step 3 under frequency-variable controller and booster pump collective effect, makes the hydraulic oil in automatic pressurizing device be pressurized in advance
The pressure value of setting；
Step 4 makes the pressure value in confining pressure device keep stablizing by the collective effect of pressure sensor and vacuum tank；
Hydraulic oil after pressurizeing in automatic pressurizing device is transported in pressure chamber, when hydraulic oil is full of by step 5 by oil inlet pipe
During pressure chamber, float effect of increasing blocks exhaust outlet on inner mechanism in automatic exhaust steam valve, so as to confining pressure device into
Row pressurizes, and the oil pressure in pressure chamber can be read by digital pressure gauge；
Step 6 opens gas-filled switching tube, carries out blasting impact experiment；
Step 7 after impact, stops pressurizeing and simultaneously closes inlet valve, open simultaneously delivery valve, the hydraulic oil in pressure chamber by
Flowline flows back into oil sources and completes release；
Step 8 takes out the sample after blasting impact from confining pressure device, and experiment finishes.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention can meet high country rock pressure in deep rock mass engineering project
The experiment condition of force environment realizes the transformation for being loaded into from manually confining pressure and automatically controlling confining pressure loading, while in confining pressure
Automatic exhaust steam valve is mounted on cylinder body, eliminates the manual operation step for being opened manually and closing vent valve；Automatic pressurizing device
Can Automatic-boosting to specified confining pressure and keep stablize；The present invention has that working efficiency is high, experimental precision is high, the spies such as easy to operate
Point can effectively solve the existing experimental situation for adding confining pressure system that can not simulate under deep rock mass engineering project high confining pressure state, experiment
Process needs more people to be carried out at the same time operation, manual pressure more difficult the problems such as maintaining pressure stability.
Description of the drawings
Fig. 1 is the structure diagram for the Hopkinson pressure bar confining pressure automatic control system of deep rock mass engineering project.
Fig. 2 is the overall structure diagram of existing Hopkinson pressure bar confining pressure manual loading system.
Wherein：1- digital pressure gauges；2- confining pressure cylinder bodies；3- pressure chambers；4- rubber sleeves；5- samples；6- incident bars；7- is transmitted
Bar；8- oil inlet pipes；9- flowlines；10- inlet valves；11- delivery valves；12- oil sources；13- booster pumps；14- pressure sensors；15-
Vacuum tank；16- frequency-variable controllers；17- automatic pressurizing devices；18- automatic exhaust steam valves；19- ordinarily manometers；20- vent valves；
21- oil inlet pipes/flowline；22- hydraulic hand pumps；23- handwheels；24- handles.
Specific embodiment
The technical solution of this patent is described in more detail With reference to embodiment.
- 2 are please referred to Fig.1, a kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project, including certainly
Dynamic pressue device 17, confining pressure device and pipe-line system, the automatic pressurizing device 17 include digital pressure gauge 1, oil sources 12, supercharging
It pumps 13, frequency-variable controller 16, pressure sensor 14 and vacuum tank 15 and automatic pressurizing device 17 is connected with power supply, pressure sensing
Device 14 and digital pressure gauge 1 are installed on oil inlet pipe 8 and pressure sensor 14 is electrically connected with digital pressure gauge 1, booster pump
13 are connected and booster pump 13 is between oil sources 12 and vacuum tank 15 with oil sources 12, and pressure sensor 14 and booster pump 13 pass through
Cable is connected with frequency-variable controller 16, and confining pressure device includes confining pressure cylinder body 2, pressure chamber 3, rubber case 4 and automatic exhaust steam valve 18, from
Dynamic air bleeding valve 18 is located at 2 top of confining pressure cylinder body, and pipe-line system includes oil inlet pipe 8, flowline 9, inlet valve 10 and delivery valve 11, institute
It states oil inlet pipe 8 and connects the top of confining pressure cylinder body 2 and automatic pressurizing device 17 respectively, the flowline 9 connects confining pressure cylinder body 2 respectively
Bottom and automatic pressurizing device 17, be respectively arranged with inlet valve 10 and delivery valve 11 on oil inlet pipe 8 and flowline 9.Confining pressure cylinder
Body 2, pressure chamber 3 and rubber case 4 form the main body and confining pressure cylinder body 2 of confining pressure device, pressure chamber 3 and rubber case 4 from outside to inside
It sets gradually.
The operating method of the Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project, specific steps
It is as follows：
Step 1, whether checking experiment instrument each section intact, by rock sample 5 by confining pressure cylinder body 2 be placed on incident bar 6 and thoroughly
Blend rubber set 4 entangles sample 5 between penetrating bar 7, ensures incident bar 6, sample 5, transmission bar 7 in the same horizontal line, and will be certainly
Dynamic pressue device 17 powers on；
Step 2 closes delivery valve 11, opens inlet valve 10, and pressure needed for large ground pressure is set using frequency-variable controller 16
Power range（60-130MPa）；
Step 3 under frequency-variable controller 16 and 13 collective effect of booster pump, is pressurized the hydraulic oil in automatic pressurizing device 17
To preset pressure value；
Step 4 makes the pressure value in confining pressure device keep stablizing by the collective effect of pressure sensor 14 and vacuum tank 15；
Hydraulic oil after pressurizeing in automatic pressurizing device 17 by oil inlet pipe 8 is transported in pressure chamber 3, works as hydraulic oil by step 5
During full of pressure chamber 3, float effect of increasing blocks exhaust outlet on inner mechanism in automatic exhaust steam valve 18, so as to confining pressure
Device pressurizes, and the oil pressure in pressure chamber 3 can be read by digital pressure gauge 1；
Step 6 opens gas-filled switching tube, carries out blasting impact experiment；
Step 7 after impact, stops pressurizeing and simultaneously closes inlet valve 10, open simultaneously delivery valve 11, the hydraulic pressure in pressure chamber 3
Oil flows back into oil sources 12 by flowline 9 and completes release；
Step 8 takes out the sample 5 after blasting impact from confining pressure device, and experiment finishes.
The present invention operation principle be：Using automatic pressurizing device 17 under pressure, first close delivery valve 11, open into
Then fuel tap 10 makes automatic pressurizing device 17 bring into operation；The pressure value being pressurized required for being set again with frequency-variable controller 16,
Under frequency-variable controller 16 and 13 collective effect of booster pump, using loop control theory by actual set target pressure value and currently
The pressure value detected is compared, and is passed through some array function algorithms and be changed to this difference and level off to zero, makes hydraulic oil
It is pressurized to preset pressure value；Then pressure is made to keep steady by the collective effect of pressure sensor 14 and vacuum tank 15
Fixed, hydraulic oil is transported to confining pressure device by oil inlet pipe 8；When hydraulic oil is full of pressure chamber, in automatic exhaust steam valve 18 on float
It rises to act on and blocks exhaust outlet on inner mechanism, confining pressure device is made to pressurize；Finally, stop pressurizeing and closing oil inlet during release
Valve 10, opens simultaneously delivery valve 11, and the hydraulic oil in confining pressure device flows back into oil sources 12 by flowline 9.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (3)
1. a kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project, which is characterized in that including automatic
Pressue device, confining pressure device and pipe-line system, the automatic pressurizing device include digital pressure gauge, oil sources, booster pump, frequency conversion control
Device processed, pressure sensor and vacuum tank and automatic pressurizing device is connected with power supply, pressure sensor and digital pressure gauge are pacified
On oil inlet pipe and pressure sensor is electrically connected with digital pressure gauge, and booster pump is connected with oil sources and booster pump is located at oil
Between source and vacuum tank, pressure sensor and booster pump are connected by cable with frequency-variable controller, and confining pressure device includes confining pressure cylinder
Body, pressure chamber, rubber case and automatic exhaust steam valve, automatic exhaust steam valve are located at confining pressure cylinder body top, and pipe-line system includes oil inlet pipe, goes out
Oil pipe, inlet valve and delivery valve, the oil inlet pipe connect top and the automatic pressurizing device of confining pressure cylinder body, the flowline respectively
The bottom of connection confining pressure cylinder body and automatic pressurizing device respectively are respectively arranged with inlet valve and fuel-displaced on oil inlet pipe and flowline
Valve.
2. the Hopkinson pressure bar confining pressure automatic control system according to claim 1 for deep rock mass engineering project, special
Sign is that the confining pressure cylinder body, pressure chamber and rubber case form main body and confining pressure cylinder body, the pressure chamber and rubber of confining pressure device
Set is set gradually from outside to inside.
3. a kind of Hopkinson pressure bar confining pressure for deep rock mass engineering project as described in claim 1-2 is any, which automatically controls, is
The operating method of system, which is characterized in that be as follows：
Step 1, whether checking experiment instrument each section is intact, and rock sample is placed on incident bar and transmission by confining pressure cylinder body
Blend rubber set entangles sample between bar, ensures incident bar, sample and transmission bar in the same horizontal line, and Self-pressurizing agri is filled
It puts and powers on；
Step 2 closes delivery valve, opens inlet valve, uses pressure model needed for frequency-variable controller setting large ground pressure
It encloses；
Step 3 under frequency-variable controller and booster pump collective effect, makes the hydraulic oil in automatic pressurizing device be pressurized in advance
The pressure value of setting；
Step 4 makes the pressure value in confining pressure device keep stablizing by the collective effect of pressure sensor and vacuum tank；
Hydraulic oil after pressurizeing in automatic pressurizing device is transported in pressure chamber, when hydraulic oil is full of by step 5 by oil inlet pipe
During pressure chamber, float rises and blocks exhaust outlet in automatic exhaust steam valve, so as to pressurize to confining pressure device, in pressure chamber
Oil pressure can be read by digital pressure gauge；
Step 6 opens gas-filled switching tube, carries out blasting impact experiment；
Step 7 after impact, stops pressurizeing and simultaneously closes inlet valve, open simultaneously delivery valve, the hydraulic oil in pressure chamber by
Flowline flows back into oil sources, completes release；
Step 8 takes out the sample after blasting impact from confining pressure device, and experiment finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810033990.7A CN108169006A (en) | 2018-01-15 | 2018-01-15 | A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810033990.7A CN108169006A (en) | 2018-01-15 | 2018-01-15 | A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project |
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| CN108169006A true CN108169006A (en) | 2018-06-15 |
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| CN201810033990.7A Pending CN108169006A (en) | 2018-01-15 | 2018-01-15 | A kind of Hopkinson pressure bar confining pressure automatic control system for deep rock mass engineering project |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021088238A1 (en) * | 2019-11-08 | 2021-05-14 | 山东科技大学 | Shpb test system-based dynamic lateral strain measurement device and method for test piece |
| CN112901573A (en) * | 2021-01-15 | 2021-06-04 | 四川大学 | Calibration platform temperature and pressure alternative control system and control method thereof |
| WO2023193469A1 (en) * | 2022-11-30 | 2023-10-12 | 安徽理工大学 | Gas pressure maintaining split hopkinson pressure bar confining pressure device and usage method therefor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021088238A1 (en) * | 2019-11-08 | 2021-05-14 | 山东科技大学 | Shpb test system-based dynamic lateral strain measurement device and method for test piece |
| CN112901573A (en) * | 2021-01-15 | 2021-06-04 | 四川大学 | Calibration platform temperature and pressure alternative control system and control method thereof |
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Application publication date: 20180615 |