CN207231916U - A kind of geotechnique's triaxial tests equipment - Google Patents
A kind of geotechnique's triaxial tests equipment Download PDFInfo
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- CN207231916U CN207231916U CN201721031498.3U CN201721031498U CN207231916U CN 207231916 U CN207231916 U CN 207231916U CN 201721031498 U CN201721031498 U CN 201721031498U CN 207231916 U CN207231916 U CN 207231916U
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Abstract
The utility model proposes a kind of geotechnological triaxial tests equipment, axial loading system, horizontal direction loading system, radial strain instrument, water pressure room and water pressure adjustment control plate；Water pressure adjustment control plate is used for the confined pressure for adjusting water pressure room；It is characterized in that：Axial loading system includes the sensors in series below axial liquid cylinder pressure and axial liquid cylinder pressure, sensors in series includes the small-range sensor and sensors of large measurement range of series connection, so in an experiment, axial compressive force data can more accurately be obtained, in addition, first flow path valve is used, second flow path valve and four-way valve control the fuel feeding of axial hydraulic cylinder, also use cut-out and keep system stability of the valve when keeping axial pressure working condition, further, switching valve is also used according to the actual conditions of operating mode to select fuel feeding pattern, enable axial liquid cylinder pressure preferably to ground sample pressure supply.
Description
Technical field
A kind of geotechnological triaxial tests equipment is the utility model is related to, is specially the side that axial force measuration uses sensor series
The geotechnological triaxial tests equipment of formula.
Background technology
In geotechnical testament, soil body ordinary triaxial test is to apply axis under different constant confining pressures with a cylinder style
Shearing is carried out to power until sample destroys.Existing triaxial test is all there are the problem of pressure detecting, according to requirement of experiment, in reality
Testing the incipient stage needs to detect small load, and the later stage is, it is necessary to detect big load in an experiment.It is right with the development of soil mechanics
The research of soil deformation most incipient stage is goed deep into, and can not meet to test the incipient stage only with the sensor of a wide range
Accuracy of detection requirement.In order to which each stage of geotechnological stress-strain test equipment requirement in soil deformation provides reliable examination
Data are tested, and probe into the constitutive relation model that the soil body deforms in each stage.
Domestic scholars Yan Chong surpasses mentions axial force survey in " improvement and research of geotechnological stress-strain test equipment " text
Amount carries out the classification measurement axial force of big small-range by the way of sensor series, but its so-called sensor series is substantially
The parallel connection of sensor, the sensor of big small-range is that parallel connection is set in together in fact, each with independent signal acquiring system
And dynamical system, this make it that experimental facilities is very huge on the whole, and the switching construction of size range sensors is also very multiple
It is miscellaneous.
How to propose the geotechnological triaxial tests equipment of real axial force measuring sensor series connection, and propose to be applicable in the string
The control structure of connection mode is the technical problem that long-term hope solves at present, in view of this, proposes the utility model.
Utility model content
The utility model proposes a kind of geotechnological triaxial tests equipment, including axial loading system, horizontal direction loading system, footpath
To deformeter, water pressure room and water pressure adjustment control plate；Water pressure adjustment control plate is used for the confined pressure for adjusting water pressure room；Axis
Include the sensors in series below axial liquid cylinder pressure and axial liquid cylinder pressure to loading system, sensors in series includes a small amount of of series connection
Journey sensor and sensors of large measurement range.
Preferably, sensors in series includes bearing support, and sensors of large measurement range is located on bearing support in cylinder and and axial hydraulic
Cylinder is connected, and small-range sensor is located under bearing support in cylinder, and small-range sensor, partition plate, spring, pressing sleeve are sequentially connected, and work as bullet
When spring stress exceedes small-range sensor preset value, pressing sleeve withstands on cylinder lower end under bearing support, and stress is detected by sensors of large measurement range
Situation.
Preferably, axial liquid cylinder pressure includes rodless cavity, rod chamber, piston rod, and axial loading system further includes first flow path
Valve, second flow path valve and four-way valve, first flow path valve have the A1 mouths being connected with rod chamber, the A2 being connected with the C2 mouths of four-way valve
Mouthful, the A3 mouths being connected with the C1 mouths of four-way valve, are also biased spring and press to the first guiding valve with the first sliding spool, the first sliding spool
Seat, in A2 confession high pressure oils, the first sliding spool leaves the first slide valve seat, and the first sliding spool also has an A7 head pieces, A3 mouthfuls successively with
A7 head pieces, the first check valve, A1 mouthfuls of connections form fuel feeding flow path, and A3 mouthfuls are connected to form oil return with the first slide valve seat, A1 mouthfuls successively
Flow path；
Second flow path valve has the B1 mouths being connected with rodless cavity, the B2 mouths being connected with the C1 mouths of four-way valve, with four-way valve C's
The B3 mouths of C2 mouthfuls of connections, are also biased spring and press to the second slide valve seat with the second sliding spool, the second sliding spool, high in B2 confessions
The second sliding spool B5 leaves the second slide valve seat during pressure oil, and the second sliding spool also has a B7 head pieces, B3 mouthfuls successively with B7 head pieces, second
Check valve, B1 mouthfuls of connections form fuel feeding flow path, and B3 mouthfuls are connected to form oil return flow path with the second slide valve seat, B1 mouthfuls successively；
At pressurizing valve position, C4 mouthfuls connect four-way valve with C2 confessions oil, and C1 mouthfuls connect with C3 mouthfuls of oil returns, in stop valve position
When, C1 mouthfuls are each disconnected to C4 mouthfuls by four-way valve sliding spool, and at dropping valve position, C4 mouthfuls connect with C1 confessions oil, C2 mouthfuls and C4
Mouth oil return connection.
Preferably, four-way valve one end has C5 mouthfuls of control mouth of cut-out, and there is the four-way valve C other ends cut-out to keep valve, cut-out
Valve is kept to have with the C5 mouthfuls of E3 being connected mouths, the E1 mouths being connected with oil storage portion, the E2 mouths with the 3rd pump connection, stop valve holding valve
Also there is the cut-out spool of two valve platforms, the sliding spool for cutting off spool one end and four-way valve connects, and the other end has resetting spring,
Two valve platforms of spool are cut off at the stop valve position of four-way valve, while close E1 mouthfuls and E2 mouthfuls, in the pressurizing valve position of four-way valve
When, E1 mouthfuls connect with E3 mouthfuls, and at the dropping valve position of four-way valve, E2 mouthfuls connect with E1 mouthfuls.
Preferably, switching valve is further included, it includes switching spool, and the first switching valve platform for switching spool is located at the first valve chamber
Interior, the second switching valve platform is located in the second valve chamber, and the first valve chamber has D1 mouthfuls, and D3 mouthfuls, D5 mouthfuls, the second valve chamber has D2 mouthfuls, D4
Mouthful, D6 mouthfuls, D1 mouthfuls are connected with D2 mouthfuls with the C4 mouths of four-way valve, and switching spool, which prolongs it, axially also has return flow line, the reflux
Passage with D5 mouthful and D6 mouthfuls on the same line, the C3 mouths of four-way valve, the D5 mouths of switching valve, return flow line, D6 mouthfuls and oil storage portion
Form normally opened passage；Switch spool selectively D3 mouthfuls of conducting, D1 mouthfuls of flow paths and D4 mouthfuls, D2 mouthfuls of flow paths；First pump is low for big flow
Press pump is connected with D3 mouthfuls；Second pump is connected for small flow high pressure pump with D4 mouthfuls.
The utility model also proposes a kind of control method of geotechnological triaxial tests equipment, it is real using foregoing three axis of geotechnique
Test equipment：
Step 1)：Place ground sample；
Step 2)：Controller is put four-way valve and is started in pressurizing valve position, switching valve in conducting D3 mouthfuls, D1 mouthfuls of flow paths, the first pump
Low pressure oil largely is supplied, sensors in series and ground sample contacts, control when the small-range sensor of sensors in series has reading
Device gathers small-range sensing data；
Step 3)：When the small-range sensor reading of sensors in series keep constant within a predetermined period of time and wide range pass
When sensor reading dramatically increases, controller collection sensors of large measurement range data；Controller puts four-way valve in pressurizing valve position, switching valve
In turning on D2 mouthfuls, D4 mouthfuls of flow paths, the second pump starts to supply high pressure oil in a small amount；
Step 4)：When needing to keep pressure, controller puts four-way valve in stop valve position, and controller starts the 3rd pump, cuts
It is disconnected to keep valve to keep four-way valve in stop valve position；
Step 5)：When needing pressure release, controller puts four-way valve in dropping valve position, and switching valve is in D3 mouthfuls of conducting, D1 mouthfuls of streams
Road.
Beneficial effect
The utility model has used sensors in series, it includes the small-range sensor and sensors of large measurement range of series connection, real
Series connection collection axial compressive force data truly are showed.
In addition, having used first flow path valve, second flow path valve and four-way valve to control the fuel feeding of axial hydraulic cylinder, also use
Cut-out keeps system stability of the valve when keeping axial pressure working condition.
Further, switching valve is also used according to the actual conditions of operating mode to select fuel feeding pattern, enables axial liquid cylinder pressure
Preferably to ground sample pressure supply.
Brief description of the drawings
Fig. 1 is the prior art " improvement and research of a geotechnological stress-strain test equipment " text 2.2.2 Design of Mechanical Structure
In parallel technology scheme.
Fig. 2 is the integrated hydraulic transmission diagram of the utility model.
Fig. 3 is the utility model sensors in series structure diagram.
Description of reference numerals
Further clearly to illustrate the connection relation between the structure of the utility model and each component, give following attached
Icon is remembered, and is illustrated.
Axial liquid cylinder pressure 1, rodless cavity 11, rod chamber 12, piston rod 13, sensors in series 2, sensors of large measurement range 21 are small
Range sensors 22, pressing sleeve 23, spring 24, partition plate 25, bearing support 26, cylinder 261 on bearing support, cylinder 262 under bearing support are first-class
Road valve A, A1 mouthfuls, A2 mouthfuls, A3 mouthfuls, the first slide valve seat A4, the first sliding spool A5, the first check valve A6, A7 head piece, second flow path valve
B, B1 mouthfuls, B2 mouthfuls, B3 mouthfuls, the second slide valve seat B4, the second sliding spool B5, the second check valve B6, B7 head piece, four-way valve C, C1 mouthful,
C2 mouthfuls, C3 mouthfuls, C4 mouthfuls, cut-out keeps valve E, E1 mouthful, E2 mouthfuls, E3 mouthfuls, switching valve D, D1 mouthful, D2 mouthfuls, D3 mouthfuls, D4 mouthfuls, D5 mouthfuls, D6
Mouthful, switching spool D7, the first valve chamber D8, the second valve chamber D9 first pump P1, second pumps P2, controller 4, oil storage portion 6.
By above-mentioned description of reference numerals, with reference to the embodiment of the utility model, it can be more clearly understood and illustrate
The technical solution of the utility model.
Embodiment
Referring to Fig. 1, it is substantially a kind of parallel double-range sensor.The application proposes that a kind of geotechnological triaxial tests are set
Standby, it is with axial loading system, horizontal direction loading system, radial strain instrument, water pressure room and water pressure adjustment control plate；Water
Pressure adjustment control plate is used for the confined pressure for adjusting water pressure room, these are the prior art, are repeated no more；The geotechnique three of the application
The axial loading system that axis experimental facilities has includes axial liquid cylinder pressure 1 and the sensors in series 2 of the lower section of axial liquid cylinder pressure 1, string
Join small-range sensor and sensors of large measurement range that sensor 2 includes series connection.
Sensors in series 2 includes bearing support 26, sensors of large measurement range 21 be located on bearing support in cylinder and with axial liquid cylinder pressure 1
It is connected, small-range sensor 22 is located under bearing support in cylinder, and small-range sensor 22, partition plate 25, spring 24, pressing sleeve 23 connect successively
Connecing, so when carrying out triaxial tests, first apply small load in the axial direction, pressing sleeve 23 compresses spring 24 at this time, and then upwards
Partition plate 25 is promoted, partition plate 25 is acted on small-range sensor 22, and controller only reads the data of small-range sensor 22 at this time.
When 24 stress of spring exceedes small-range 22 preset value of sensor, pressing sleeve 23 withstands on cylinder lower end under bearing support, is sensed by wide range
Device 21 detects stressing conditions.Travel switch can be set in pressing sleeve 23 and lower cylinder lower end, when pressing sleeve 23 is withstood under bearing support under cylinder
During end, travel switch closure sends a signal to controller, and the data of sensors of large measurement range 21 are only read after such controller.
It can be arranged to when controller detects that 22 reading of small-range sensor is constant and 21 reading of sensors of large measurement range dramatically increases,
Only read the data of sensors of large measurement range 21.
Lifting, decline and pressure for sensors in series 2, the application propose that new fluid pressure line carrys out driving axial loading
System, axial liquid cylinder pressure 1 include rodless cavity 11, rod chamber 12, piston rod 13, and axial loading system further includes first flow path valve A,
Second flow path valve B and four-way valve C, first flow path valve A have the A1 mouths being connected with rod chamber 12, are connected with the C2 mouths of four-way valve C
A2 mouths, the A3 mouths being connected with the C1 mouths of four-way valve C, are also biased spring pressure with the first sliding spool A5, the first sliding spool A5
To the first slide valve seat A4, in A2 confession high pressure oils, the first sliding spool A5 leaves the first slide valve seat A4, and the first sliding spool A5 also has
Have A7 head pieces, A3 is connected to form fuel feeding flow path with A7 head pieces, A6, A1 mouthfuls of the first check valve successively, A3 successively with the first slide valve seat
A4, A1 mouthfuls of connections form oil return flow path；
Second flow path valve B has the B1 mouths being connected with rodless cavity 11, the B2 mouths being connected with the C1 mouths of four-way valve C, with four-way
The B3 mouths of the C2 mouths connection of valve C, are also biased spring and press to the second slide valve seat with the second sliding spool B5, the second sliding spool B5
B4, in B2 confession high pressure oils, the second sliding spool B5, which leaves the second slide valve seat B4, the second sliding spool B5, also has a B7 head pieces, B3 mouthfuls
Be connected to form fuel feeding flow path with B7 head pieces, B6, B1 mouthfuls of the second check valve successively, B3 successively with the second slide valve seat B4, B1 mouthfuls be connected
Form oil return flow path；
At pressurizing valve position, C4 mouthfuls connect four-way valve C with C2 confessions oil, and C1 mouthfuls connect with C3 mouthfuls of oil returns, in stop valve position
When, C1 mouthfuls to C4 mouthfuls are each disconnected by four-way valve C sliding spools, and at dropping valve position, C4 mouthfuls connect with C1 confessions oil, C2 mouthfuls and C4
Mouth oil return connection.
In use, when it is desirable that to when falling sensors in series 2, four-way valve C connects pressurizing valve position, C4 mouthfuls with C2 confessions oil
Logical, C2 mouthfuls are given B3 and A2 fuel feeding at the same time, and under the action of high pressure liquid pressure oil, the second check valve B6 conductings, B1 is into rodless cavity 11
Fuel feeding, and A2 mouthfuls under high pressure oil effect, promotes the first sliding spool A5 to leave the first slide valve seat A4, the liquid in such rod chamber 12
Pressure oil is back in oil storage portion 6 from A1 mouthfuls, A4 to A3 mouthfuls of the first slide valve seat, then from C1 mouthfuls and C3 mouthfuls.
When it is desirable that lifting sensors in series 2, four-way valve C is supplied high pressure liquid pressure oil dropping valve position, A3 mouthfuls and B2 mouthfuls,
So oil return flow path of first flow path valve A fuel feeding flow path and second flow path valve B is switched on, and piston rod is jacked up upwards.
Moreover, four-way valve C one end has C5 mouthfuls of control mouth of cut-out, there is the four-way valve C other ends cut-out to keep valve E, cut-out
Valve E is kept to have with the C5 mouthfuls of E3 being connected, the E1 mouths being connected with oil storage portion 6, the E2 mouths being connected with the 3rd pump P3, cut-out holding valve
E also has the cut-out spool of two valve platforms, and cut-out spool and the sliding spool of four-way valve C interlock, and two valve platforms for cutting off spool exist
During the stop valve position of four-way valve C, while E1 mouthfuls and E2 mouthfuls are closed, at the pressurizing valve position of four-way valve C, E1 mouthfuls connect with E3 mouthfuls,
At the dropping valve position of four-way valve C, E2 mouthfuls connect with E1 mouthfuls.
When it is desirable that fixed to the position of sensors in series 2, preventing piston rod from moving, four-way valve C is in stop valve position at this time, together
When first flow path valve A, effects of the second flow path valve B because losing high pressure oil, the flow path inside respective check valve and spring cut-out.
But since four-way valve C upstream and downstream are pressure duct in system, sometimes because the failure of other hydraulic valves can make four-way
The spool movement of valve C, so as to be inclined to pressurizing valve position or dropping valve position from stop valve position.For this reason, adding cut-out keeps valve E, when
When the spool of four-way valve C is in the pressurizing valve position in left side, cut-out keeps the spool of valve E to be also at left side, at this moment C5 mouthful, E3 mouthfuls with
E1 mouthfuls of connections, E2 mouthfuls keep closing, and the hydraulic oil emptying in C5 mouthfuls, the spool of such four-way valve C moves to right, when the valve of four-way valve C
When core is in stop valve position, cut-out keeps valve E also just to cut off E1 mouthfuls, E2 mouthfuls and E3 mouthfuls；If when the spool of four-way valve C is in the right side
The dropping valve position of side, cut-out keep the E2 mouths of valve E and E3 mouthfuls of conductings, E1 mouthfuls of holding closings, the 3rd pump P3 to be pushed away to pump oil in C5 mouthfuls
The spool of dynamic four-way valve C is moved to the left to stop valve position, and cut-out keeps valve E also just to cut off E1 mouthfuls, E2 mouthfuls and E3 mouthfuls.Pass through this
The cut-out of sample keeps the arrangement of valve E, four-way valve C is ensured stop valve position state.
Switching valve D is further included, it includes switching spool D7, and the first switching valve platform of switching spool D7 is located at the first valve chamber D8
Interior, the second switching valve platform is located in the second valve chamber D9, and the first valve chamber D8 has D1 mouthfuls, and D3 mouthfuls, D5 mouthfuls, the second valve chamber 9 has D2
Mouthful, D4 mouthfuls, D6 mouthfuls, D1 mouthfuls are connected with D2 mouthfuls with the C4 mouths of four-way valve C, and it is axial also logical with reflux that switching spool D7 prolongs it
Road, the return flow line with D5 mouthfuls and D6 mouthfuls on the same line, the C3 mouths of four-way valve C, D5 mouths, return flow line, the D6 of switching valve D
Mouth forms normally opened passage with oil storage portion 6；Switch spool D7 selectively D3 mouthfuls of conducting, D1 mouthfuls of flow paths and D4 mouthfuls, D2 mouthfuls of flow paths；First
Pump P1 is connected for big flow low-lift pump with D3 mouthfuls；Second pump P2 is connected for small flow high pressure pump with D4 mouthfuls.
In general, when needing piston rod quickly to move, using big flow low-lift pump, and in pressurization, due to experiment
Middle supercharging is relatively slow, so being pressurized using small flow high pressure pump.Big flow low-lift pump is used during rodless cavity pressure release again.
A kind of control method of geotechnique's triaxial tests equipment, it uses foregoing geotechnological triaxial tests equipment：
Step 1)：Place ground sample；
Step 2)：Controller 4 puts four-way valve C in pressurizing valve position, and for switching valve D in turning on D3 mouthfuls, D1 mouthfuls of flow paths, first pumps P1
Start largely to supply low pressure oil, when the small-range sensor 22 of sensors in series 2 has reading, sensors in series 2 connects with ground sample
Touch, 22 data of controller collection small-range sensor；
Step 3)：When 22 reading of small-range sensor of sensors in series 2 is kept constant and largely within a predetermined period of time
When 21 reading of journey sensor dramatically increases, controller 4 gathers 21 data of sensors of large measurement range；Controller 4 puts four-way valve C in pressurization
Valve position, in turning on D2 mouthfuls, D4 mouthfuls of flow paths, second pumps P2 starts to supply high pressure oil in a small amount switching valve D；
Step 4)：When needing to keep pressure, controller 4 puts four-way valve C in stop valve position, and controller starts the 3rd pump
P3, cut-out keep valve E to keep four-way valve C in stop valve position；
Step 5)：When needing pressure release, controller 4 puts four-way valve C in dropping valve position, and switching valve D is in D3 mouthfuls, D1 mouthfuls of conducting
Flow path.
It should be pointed out that for those of ordinary skill in the art, on the premise of the utility model principle is not departed from,
Some improvement and modification can also be carried out to the utility model, these are improved and modification also falls into the utility model claims
In protection domain.
Claims (5)
1. a kind of geotechnique's triaxial tests equipment, including axial loading system, horizontal direction loading system, radial strain instrument, water pressure
Room and water pressure adjustment control plate；Water pressure adjustment control plate is used for the confined pressure for adjusting water pressure room；It is characterized in that：It is axial to add
Loading system includes axial liquid cylinder pressure（1）With the sensors in series below axial liquid cylinder pressure（2）, sensors in series includes connecting small
Range sensors（22）And sensors of large measurement range（21）.
2. geotechnique's triaxial tests equipment according to claim 1, it is characterised in that：Sensors in series includes bearing support
（26）, sensors of large measurement range（21）In cylinder on bearing support and with axial liquid cylinder pressure（1）It is connected, small-range sensor（22）Position
Under bearing support in cylinder, small-range sensor（22）, partition plate（25）, spring（24）, pressing sleeve（23）It is sequentially connected, works as spring（24）
Stress exceedes small-range sensor（22）During preset value, pressing sleeve（23）Cylinder lower end under bearing support is withstood on, by sensors of large measurement range
（21）Detect stressing conditions.
3. geotechnique's triaxial tests equipment according to claim 2, it is characterised in that：Axial liquid cylinder pressure includes rodless cavity
（11）, rod chamber（12）, piston rod（13）, axial loading system further includes first flow path valve（A）, second flow path valve（B）With four
Port valve（C）, first flow path valve（A）With the A1 mouths being connected with rod chamber, with four-way valve（C）C2 mouths connection A2 mouths, with four
Port valve（C）C1 mouths connection A3 mouths, also with the first sliding spool（A5）, the first sliding spool（A5）It is biased spring and presses to first
Slide valve seat（A4）, the first sliding spool in A2 confession high pressure oils（A5）Leave the first slide valve seat（A4）, the first sliding spool（A5）Also
With A7 head pieces, A3 mouthfuls successively with A7 head pieces, the first check valve（A6）, A1 mouthfuls of connections form fuel feeding flow path, A3 mouthfuls successively with the
One slide valve seat（A4）, A1 mouthfuls of connections form oil return flow path；
Second flow path valve（B）With the B1 mouths being connected with rodless cavity, with four-way valve（C）C1 mouths connection B2 mouths, with four-way valve C
C2 mouths connection B3 mouths, also with the second sliding spool（B5）, the second sliding spool（B5）It is biased spring and presses to the second slide valve seat
（B4）, in B2 confession high pressure oils, the second sliding spool B5 leaves the second slide valve seat（B4）, the second sliding spool（B5）Also there is B7 streams
Mouthful, B3 mouthfuls successively with B7 head pieces, the second check valve（B6）, B1 mouthfuls of connections form fuel feeding flow path, B3 mouthfuls successively with the second slide valve seat
（B4）, B1 mouthfuls of connections form oil return flow path；
Four-way valve（C）At pressurizing valve position, C4 mouthfuls connect with C2 confessions oil, and C1 mouthfuls connect with C3 mouthfuls of oil returns, at stop valve position,
C1 mouthfuls to C4 mouthfuls each by four-way valve（C）Sliding spool disconnects, and at dropping valve position, C4 mouthfuls connect with C1 confessions oil, C2 mouthfuls and C4
Mouth oil return connection.
4. geotechnique's triaxial tests equipment according to claim 3, it is characterised in that：Four-way valve（C）There is cut-out to control for one end
There is cut-out to keep valve for C5 mouthfuls of donsole, the four-way valve C other ends（E）, cut-out holding valve（E）With with the C5 mouthfuls of E3 being connected mouths, with
Oil storage portion（6）The E1 mouths of connection, with the 3rd pump（P3）The E2 mouths of connection, stop valve keep valve（E）Also there is cutting for two valve platforms
Disconnected spool, cuts off spool one end and four-way valve（C）Sliding spool connection, the other end has resetting spring, cut off spool two
Valve platform is in four-way valve（C）Stop valve position when, while E1 mouthfuls and E2 mouthfuls are closed, in four-way valve（C）Pressurizing valve position when, E1 mouthfuls with
E3 mouthfuls of connections, in four-way valve（C）Dropping valve position when, E2 mouthfuls connect with E1 mouthfuls.
5. geotechnique's triaxial tests equipment according to claim 4, it is characterised in that：Further include switching valve（D）, it includes cutting
Change spool（D7）, switch spool（D7）The first switching valve platform be located at the first valve chamber（D8）Interior, the second switching valve platform is located at second
Valve chamber（D9）It is interior, the first valve chamber（D8）With D1 mouthfuls, D3 mouthfuls, D5 mouthfuls, the second valve chamber（D9）With D2 mouthfuls, D4 mouthfuls, D6 mouthfuls, D1 mouthfuls
With D2 mouthfuls and four-way valve（C）C4 mouths be connected, switch spool（D7）Prolonging it axially also has a return flow line, the return flow line and
D5 mouthfuls and D6 mouthfuls on the same line, four-way valve（C）C3 mouths, switching valve（D）D5 mouths, return flow line, D6 mouthfuls with oil storage portion
（6）Form normally opened passage；Switch spool（D7）D3 mouthfuls of selectivity conducting, D1 mouthfuls of flow paths and D4 mouthfuls, D2 mouthfuls of flow paths；First pump（P1）
It is connected for big flow low-lift pump with D3 mouthfuls；Second pump（P2）It is connected for small flow high pressure pump with D4 mouthfuls.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721031498.3U CN207231916U (en) | 2017-08-17 | 2017-08-17 | A kind of geotechnique's triaxial tests equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721031498.3U CN207231916U (en) | 2017-08-17 | 2017-08-17 | A kind of geotechnique's triaxial tests equipment |
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| CN207231916U true CN207231916U (en) | 2018-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462475A (en) * | 2017-08-17 | 2017-12-12 | 华能澜沧江水电股份有限公司 | A kind of geotechnological triaxial tests equipment |
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2017
- 2017-08-17 CN CN201721031498.3U patent/CN207231916U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462475A (en) * | 2017-08-17 | 2017-12-12 | 华能澜沧江水电股份有限公司 | A kind of geotechnological triaxial tests equipment |
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