CN201983993U - Load maintaining hydraulic device for creep test in power failure - Google Patents
Load maintaining hydraulic device for creep test in power failure Download PDFInfo
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- CN201983993U CN201983993U CN2010206725026U CN201020672502U CN201983993U CN 201983993 U CN201983993 U CN 201983993U CN 2010206725026 U CN2010206725026 U CN 2010206725026U CN 201020672502 U CN201020672502 U CN 201020672502U CN 201983993 U CN201983993 U CN 201983993U
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- stop valve
- valve
- power failure
- creep test
- stop
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Abstract
The utility model discloses a load maintaining hydraulic device for a creep test in power failure, solving the problem of power failure in an earthwork triaxial creep test. The load maintaining hydraulic device comprises an electro-hydraulic servo valve (8), an actuator (9), an energy accumulator (1), a one-way throttle valve (2), a stop valve I (3), a stop valve II (4), a stop valve III (5), a stop valve IV (6) and a stop valve V (7), wherein the energy accumulator (1) is connected with the lower chamber of the actuator (9) through the one-way throttle valve (2) and the stop valve II (4), the stop valve III (5) is arranged between the electro-hydraulic servo valve (8) and the actuator (9), the stop valve IV (6) and the stop valve V (7) are arranged in front of the electro-hydraulic servo valve (8), one end of the stop valve I (3) is arranged between the one-way throttle valve (2) and the stop valve II (4), and the other end of the stop valve I (3) is arranged behind the stop valve IV (6).
Description
Technical field
The utility model relates to a kind of test unit, is specifically related to a kind of geotechnological triaxial test machine.
Background technology
Geotechnique's three axis creep test machine is applicable to measures stockpile, grit stone and gravel cohesive soil, the compressibility index of coarse-grained soil when creep test (long-term guarantor carried).Measuring maximum particle diameter is the relation of the distortion of 60mm coarse-grained soil and pressure or void ratio and pressure, distortion and time relation are so that calculate the unit settling amount of coarse-grained soil, compressibility coefficient swelling index, the volume compression relation, modulus in compression, the coefficient of consolidation and precosolidation pressure etc.
Geotechnique's three axis creep test machine testing machine power value precision is 1%RO, and the creep test test period is long, generally requires 6 months.In order to guarantee that test power value is constant in 6 months, testing machine adopts the electro-hydraulic servo closed-loop control system, promptly form closed loop with the force transducer of electrohydraulic servo valve and testing machine, apply load according to testing requirements to sample, the load of test changes electric signal into by force transducer, through electric amplification back output, one tunnel output signal as closed-loop control, another road outputs to computing machine D/A plate, is used for computer data and handles and control.The D/A plate produces the given signal that output test requires, this given signal and feedback signal compare in servo controller, its difference is error signal, and this error signal is used for driving electrohydraulic servo valve after amplifying through power amplifier, finishes the closed-loop control of system.
Top situation is under the situation that electricity is being arranged, and realizes with the pressure of electrohydraulic servo valve controlled pressure oil and flow.Reality is impossible always have, sometimes testing laboratory can have a power failure 1-2 days, and test period 6 months, if have a power failure midway then electrohydraulic servo valve loses automatically controlled, the electro-hydraulic servo valve core is got back to meta, and the valve core of servo valve meta can not sealed high pressure oil, and the hydraulic oil in that actuator can pass through the servo-valve oil sump tank, the suffered power of sample slowly descends, and therefore causes long-term guarantor to carry the creep test failure.
The method of head it off in the prior art, the one, adopt and prepare standby power supply, have a power failure and use when making at once, the method increases equipment and cost; The 2nd, adopt and prepare source of the gas or gas liquid exchanger, connect source of the gas during power failure, the method operation is cumbersome.
The utility model content
Technical problem to be solved in the utility model provides a kind of creep test power failure and protects the carrier fluid pressure device, can solve the problem that geotechnological three axis creep test has a power failure midway.
The utility model adopts the basic design of technical scheme to be: a kind of creep test has a power failure and protects the carrier fluid pressure device, it comprises electrohydraulic servo valve, actuator, described creep test power failure is protected the carrier fluid pressure device and is also comprised accumulator, one-way throttle valve, stop valve I, stop valve II, stop valve III, stop valve IV, stop valve V, accumulator passes through one-way throttle valve, stop valve II is connected to the actuator cavity of resorption, stop valve III is arranged between electrohydraulic servo valve and the actuator, stop valve IV, stop valve V is located at the electrohydraulic servo valve front, stop valve I one end is arranged on one-way throttle valve, between the stop valve II, the other end is arranged on stop valve IV back.
The beneficial effects of the utility model are, accumulator, one-way throttle valve are formed hydraulic pressure and protected and carry a fueller, and it is installed in the diverse location of hydraulic system 5 stop valves, and its function is advancing of control hydraulic oil and ends; The hydraulic pressure design concept is reliable, rationally; Easy to operate during power failure, safety; Creep test power value error is in 1% scope.
Description of drawings
Accompanying drawing is a hydraulic schematic diagram of the present utility model.
Among the figure: accumulator 1 one-way throttle valve 2 stop valve I 3 stop valve II 4 stop valve III5 stop valve IV6 stop valve V 7 electrohydraulic servo valves 8 actuator 9
Embodiment
As shown in drawings, accumulator 1 is selected 2 20 liters accumulator for use, and one-way throttle valve 2 is installed in the other direction, and the hydraulic oil positive dirction is for hydraulic oil, and the back one-way throttle valve 2 that has a power failure slowly supplies pressure oil for actuator 9 cavity of resorptions in the other direction by accumulator, and actuator 9 long-term guarantors are carried; It is installed in the diverse location of hydraulic system 5 stop valves, and its function is advancing of control hydraulic oil and ends, and makes hydraulic oil that leakage must not be arranged simultaneously, and creep test is carried out after power failure in the same old way.
Accumulator 1 advances hydraulic oil: behind the turn on pump, open stop valve IV6 and stop valve I 3, turn-off stop valve II 4; Afterburning creep test when electricity is arranged: turn-off stop valve I 3 and stop valve II 4, open stop valve III5, stop valve IV
6 and stop valve V7, protect with electrohydraulic servo valve and to carry; Afterburning creep test during outage: turn-off stop valve I 3, stop valve IV6, stop valve III5 and stop valve V 7, open stop valve II 4, protect by accumulator 1 fuel feeding and carry.Test 20 Tian Bao and carry creep test power value error in 1% scope.
Claims (1)
1. the carrier fluid pressure device is protected in a creep test power failure, it comprises electrohydraulic servo valve (8), actuator (9), it is characterized in that, described creep test power failure is protected the carrier fluid pressure device and is also comprised accumulator (1), one-way throttle valve (2), stop valve I (3), stop valve II (4), stop valve III (5), stop valve IV (6), stop valve V (7), accumulator (1) is by one-way throttle valve (2), stop valve II (4) is connected to actuator (9) cavity of resorption, stop valve III (5) is arranged between electrohydraulic servo valve (8) and the actuator (9), stop valve IV (6), stop valve V (7) is located at electrohydraulic servo valve (8) front, stop valve I (3) one ends are arranged on one-way throttle valve (2), between the stop valve II (4), the other end is arranged on stop valve IV (6) back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206725026U CN201983993U (en) | 2010-12-15 | 2010-12-15 | Load maintaining hydraulic device for creep test in power failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206725026U CN201983993U (en) | 2010-12-15 | 2010-12-15 | Load maintaining hydraulic device for creep test in power failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201983993U true CN201983993U (en) | 2011-09-21 |
Family
ID=44611452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206725026U Expired - Fee Related CN201983993U (en) | 2010-12-15 | 2010-12-15 | Load maintaining hydraulic device for creep test in power failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201983993U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088751A (en) * | 2018-02-02 | 2018-05-29 | 东北大学 | A kind of large-scale three dimensional physical experiments high rigidity prestressing force loading frame structure |
| CN108344639A (en) * | 2018-02-02 | 2018-07-31 | 东北大学 | A kind of large-scale three dimensional physical model is protected carry pilot system and method for a long time |
| CN108375508A (en) * | 2018-02-02 | 2018-08-07 | 东北大学 | A kind of large-scale three dimensional physical model Bit andits control overload test system and method |
| CN108375665A (en) * | 2018-02-02 | 2018-08-07 | 东北大学 | A kind of large size deep tunnel group three-dimensional physical model pilot system and method |
| CN108387467A (en) * | 2018-02-02 | 2018-08-10 | 东北大学 | A kind of large-scale three dimensional physical model energetic disturbance pilot system and method |
-
2010
- 2010-12-15 CN CN2010206725026U patent/CN201983993U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088751A (en) * | 2018-02-02 | 2018-05-29 | 东北大学 | A kind of large-scale three dimensional physical experiments high rigidity prestressing force loading frame structure |
| CN108344639A (en) * | 2018-02-02 | 2018-07-31 | 东北大学 | A kind of large-scale three dimensional physical model is protected carry pilot system and method for a long time |
| CN108375508A (en) * | 2018-02-02 | 2018-08-07 | 东北大学 | A kind of large-scale three dimensional physical model Bit andits control overload test system and method |
| CN108375665A (en) * | 2018-02-02 | 2018-08-07 | 东北大学 | A kind of large size deep tunnel group three-dimensional physical model pilot system and method |
| CN108387467A (en) * | 2018-02-02 | 2018-08-10 | 东北大学 | A kind of large-scale three dimensional physical model energetic disturbance pilot system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20111215 |