CN206801987U - A kind of fluid power plant for accurately controlling pressure - Google Patents
A kind of fluid power plant for accurately controlling pressure Download PDFInfo
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- CN206801987U CN206801987U CN201720634514.1U CN201720634514U CN206801987U CN 206801987 U CN206801987 U CN 206801987U CN 201720634514 U CN201720634514 U CN 201720634514U CN 206801987 U CN206801987 U CN 206801987U
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Abstract
The utility model discloses a kind of fluid power plant for accurately controlling pressure, gas boosting pipe-line system and liquid pressure piping system including being parallel-connected to pressure port, gas boosting pipe-line system includes the gas cylinder being sequentially connected, booster pump, middle pressure cutoff valve, filter, pressure-reducing valve and high-pressure stop valve three and high-pressure stop valve four, it is connected with middle pressure relief valve and high pressure tank in booster pump connection between pressure cutoff valve on pipeline, gas high pressure pressurized cylinder and high-pressure decompression valve are connected between high-pressure stop valve three and high-pressure stop valve four on pipeline, liquid pressure piping system includes the normal-pressure liquid container being sequentially connected, liquid high pressure stop valve one and liquid high pressure stop valve two, liquid pressurized cylinder is connected between liquid high pressure stop valve one and liquid high pressure stop valve two on pipeline；The utility model confined pressure pressure can reach 100MPa, pressure output scope is big, quantity of gas leakage is small, confined pressure is separately adjustable, fluctuates small, Discrete control pressure, in the range of the MPa of 0.1 MPa~100, the pressure controling precision of boosting and pressure reduction be 0.1 MPa, control pressure precision height, with small vibration, noise is small.
Description
Technical field
The invention belongs to high temperature and high voltage experimental device technical field, and in particular to a kind of fluid for accurately controlling pressure moves
Power apparatus.
Background technology
During Earth rock physicses chemical property is simulated, it have developed many and be applied to HTHP
Experimental provision.In order to obtain certain rock, mineral change of properties at various pressures, it is often necessary to carry out essence to experimental provision
True control pressure.For example, control when needing to provide water under high pressure fluid to high temperature and high voltage experimental device and accurately HTHP
During pressure in experimental provision, it is necessary to the liquid pressure piping system of a set of high pressure.And for example, in the pressure vessel of HTHP
In, if water, as transmission medium, when medium is in vapour-liquid coexistence phase, confined pressure is actually exactly equal to water in sample cavity
Saturated vapour pressure, the pressure can not carry out regulation in situ independently of temperature；When medium is in single phase（Such as gaseous state, liquid
State or above-critical state）If it need to can only be pumped into fresh solution independently of the confined pressure in temperature regulation sample cavity in situ or release sample
The aqueous fluid of interaction occurred with solid sample for intracavitary, it is clear that has now manually changed the material group of aqueous fluid system
Into.Another method is by toward the inert gases such as argon gas are added in pressure vessel, so that pressure energy is carried out independently of temperature
Regulation.And will be toward being pumped into gas in pressure vessel, it is necessary to high pressure（100 MPa）Gas pressurized device.
For the less pressure vessel of volume, it is desirable to in pressure vessel pressure carry out accuracy controlling, including boosting and
Otherwise the Stress control of pressure reduction, will make the pressure of pressure vessel, it is necessary to the fluid flow of single input or output is smaller
Instantaneously tens to hundreds of atmospheric pressure of rise, it is difficult to play the purpose of accurate control pressure（Boosting and decompression are all 0.1 MPa
Control accuracy）.
In addition, under some experimental conditions, also it is reduced vibration, reduces the demand of noise, for example, and high temperature and pressure test
Precision optical system associated with device and spectrometer, in order to which optical focus and measurement effect are good, to being shaken caused by instrument and environment
It is dynamic to have strict demand.However, existing frequently-used fluid pressurization device is all back and forth to be added using the form of Pneumatic booster pump to workpiece
Pressure.And conventional fluid pressurization device generally existing following problems：
（1）Highly pressurised liquid booster pump is generally gas drive pump, and the power resources of pneumatic fluid booster pump are pressed in compressed air
Contracting air needs air compressor, and the vibration of in general air compressor and noise are all larger, even if silent air compressor can not
Meet to require, it is impossible near spectrometer.
（2）The single-stroke discharge capacity of general liquid booster pump is larger, single-stroke discharge capacity one stroke of less liquid booster pump
Discharge capacity is 0.4 mL, for there was only several milliliters of pressure vessels to tens milliliters of volumes, it is impossible to meets accurate pressurization and decompression
It is required that.
（3）Gases at high pressure booster pump is generally gas drive pump, and the power resources of Pneumatic booster pump are compressed empty in compressed air
Gas needs air compressor, and the vibration of in general air compressor and noise are all larger, even if silent air compressor can not meet
It is required that, it is impossible near spectrometer.
（4）In general high-pressure pneumatic booster pump single-stroke discharge capacity is larger, the less gas boosting pump of single-stroke discharge capacity one
Stroke volume is 19.7 mL, it is impossible to meets the accurate requirement pressurizeed and be depressured.
（5）The general booster pump back and forth to pressurize needs to use check valve, because the design feature of check valve determines unidirectionally
The single minimum throughput of valve is typically bigger, it is impossible to meet the accurate requirement pressurizeed and be accurately depressured, and due to check valve
In the presence of, it is impossible to carry out decompression control using booster pump.
（6）Liquids and gases decompression scheme widely used at present, is to carry out pressure release using directly opening relief valve mostly,
Either it is depressured by pressure-reducing valve, but because the mechanical structure feature of pressure-reducing valve just determines pressure-reducing valve control decompression
Precision is poor, can accomplish in 0~100 MPa pressure limit currently without suitable pressure-reducing valve, and the situation of flow very little
Under, product of the pressure control precision in 0.1 MPa.
Therefore, it is necessary to redesign and from suitable pressurization scheme, to meet the pressurization demand of the experimental provision.
The content of the invention
The technical problem to be solved in the present invention is：A kind of fluid power plant for accurately controlling pressure is provided, pressure is defeated
It is big to go out scope, fluctuation is small, and control pressure precision is high, and power set are with small vibration, noise is small, simple to operate, and reliability is high, cost
Low, pressure output scope can reach the MPa of 0.1 MPa~100, in the range of whole output pressure, including boosting and pressure reduction
Pressure controling precision can reach 0.1 MPa, to solve problems of the prior art.
The technical scheme that the present invention takes is：It is a kind of to accurately control the fluid power plant of pressure, including be connected in parallel
To the gas boosting pipe-line system and liquid pressure piping system of pressure port, gas boosting pipe-line system includes the gas being sequentially connected
Bottle, booster pump, middle pressure cutoff valve, filter, pressure-reducing valve and high-pressure stop valve three and high-pressure stop valve four, pressed in booster pump connection
Middle pressure relief valve and high pressure tank are connected between stop valve on pipeline, between high-pressure stop valve three and high-pressure stop valve four on pipeline
It is connected with gas high pressure pressurized cylinder and high-pressure decompression valve, normal-pressure liquid container that liquid pressure piping system includes being sequentially connected,
High-pressure stop valve one and high-pressure stop valve two, liquid supercharging is connected between high-pressure stop valve one and high-pressure stop valve two on pipeline
Cylinder.
Preferably, above-mentioned booster pump is connected to electrodynamic pump by reversal valve, and electrodynamic pump is connected to fuel tank.
Preferably, above-mentioned middle pressure cutoff valve is connected between filter by high pressure line.
Preferably, above-mentioned reversal valve, electrodynamic pump and electro connecting pressure gauge are connected to ATS controllers, and ATS controllers are connected to
Remote-control handle.
Preferably, electro connecting pressure gauge and middle pressurized overflow are connected with pipeline between pressure cutoff valve in above-mentioned booster pump connection
Valve, middle pressurized overflow valve and high pressure tank are connected on pipeline by four-way connection, and electro connecting pressure gauge and middle pressure relief valve lead to
Four-way connection is crossed to be connected on pipeline.
Preferably, middle pressure table is installed, middle pressure table passes through three-way connection between above-mentioned pressure-reducing valve and filter on connecting pipe
It is connected on pipeline.
Preferably, above-mentioned gas high pressure pressurized cylinder is set multiple, is connected to respectively by three-way connection on pipeline.
Preferably, high pressure gauge, high pressure gauge and height are connected with pipeline between above-mentioned high-pressure stop valve three and high-pressure stop valve four
Pressure relief valve is connected on pipeline by four-way connection.
Preferably, pressure sensor two is connected with by four-way connection at aforesaid liquid pressurized cylinder efferent duct.
Beneficial effects of the present invention：Compared with prior art, effect of the invention is as follows：
（1）The fluid power plant of the present invention, it can give in pressure vessel and pressurize, transmission medium can be aqueous fluid or gas
The mixture of body or aqueous fluid and gas, confined pressure pressure can reach 100MPa, the experiment of gas pressurize at present,
In the case of 101MPa, quantity of gas leakage in 12 hours is less than 1%, and can utilize this set system to confined pressure progress independently of
The regulation of temperature, pressure output scope is big, fluctuates small, Discrete control pressure, and control pressure precision is high, is pressurized dynamic power machine sublevel
Section independent work, with small vibration, noise is small, simple to operate, reliability is high, and cost is low, pressure output scope can reach 0.1 MPa~
100 MPa, control pressure precision can reach 0.1 MPa in the range of whole output pressure；
（2）The present invention promotes booster pump toward source of the gas is stored in high pressure tank by hydraulic station, when doing experiment, by subtracting
0~35MPa pressure boosting-pressurize-decompression is realized in pressure valve regulation, when test pressure is more than 35MPa, rotates 100MPa by hand
Pressurized cylinder realizes boosting-pressurize-decompression, can realize the stability of gas pressurized, noise and vibration are reduced in experimentation,
Improve control accuracy；
（3）By pressure segment design, reach the test requirements document of 100MPa pressure；
（4）Supercharging is realized using the hydraulic station of booster pump connection during low pressure, pressure-reducing valve pressure regulation, so, power of motor is low, shakes
It is dynamic small；
（5）Using can be manually rotated high pressure pressurized cylinder during high pressure, except meeting pressure requirements, vibration can be more reduced, is set more
It is individual, the supercharging of bigger pressure can be according to circumstances realized, application greatly expands；
（6）It is pressure Discrete control pressure, including the control pressure precision of boosting and pressure reduction is high, it is not necessary to complicated
Servo-control system can also accurate control pressure rise and reduction, substantially reduce the complexity and cost of system, reducing
The reliability of system work is improved while parts.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is liquid pressurized cylinder structural representation.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described further specific embodiment.
Embodiment 1：As Figure 1-Figure 2, it is a kind of to accurately control the fluid power plant of pressure, including be parallel-connected to
The gas boosting pipe-line system and liquid pressure piping system of pressure port 7, gas boosting pipe-line system include the gas being sequentially connected
Bottle 1, booster pump 2, middle pressure cutoff valve 3, filter 4, pressure-reducing valve 5 and high-pressure stop valve 36 and high-pressure stop valve 4 31, booster pump
Middle pressure relief valve 9 and high pressure tank 11 are connected with 2 connections on 3 pipelines of pressure cutoff valve, high-pressure stop valve 36 is cut with high pressure
Gas high pressure pressurized cylinder 13 and high-pressure decompression valve 15 are only connected with 4 31 pipelines of valve, liquid pressure piping system is included successively
Normal-pressure liquid container 26, liquid high pressure stop valve 1 and the liquid high pressure stop valve 2 28 of connection, liquid high pressure stop valve one
Liquid pressurized cylinder 29 is connected between 27 and liquid high pressure stop valve 2 28 on pipeline, pressure port front end is provided with pressure sensor one
21, pressure sensor 1 is used to treating the pressure test of fluid measured, during test, pressure port is connected into workpiece to be pressurised, realized
The supercharging of pressure, decompression, holding pressure control.
Preferably, above-mentioned booster pump 2 is connected to electrodynamic pump 17 by reversal valve 16, and electrodynamic pump 17 is connected to fuel tank 18, oil
The bottom of case 18 is provided with blowoff valve 22, and hydraulic pressure station spill valve 24 and pressure monitor table 25 are provided with the outlet line of electrodynamic pump 17,
And Air cooler 23 is provided with electrodynamic pump, Air cooler is used for the cooling of electrodynamic pump, is connected to ATS controllers, controller connection
There is temperature sensor, temperature sensor is arranged on electronic pump case, according to the temperature change of temperature sensor, automatically adjusts wind
Cold rotating speed.
Preferably, connected between above-mentioned middle pressure cutoff valve 3 and filter 4 by high pressure line 19.
Preferably, above-mentioned reversal valve 16, electrodynamic pump 17 and electro connecting pressure gauge 8 are connected to ATS controllers, ATS controllers
It is connected to remote-control handle 20.
Preferably, electro connecting pressure gauge 8 is connected with during above-mentioned booster pump 2 connects on 3 pipelines of pressure cutoff valve and middle pressure is overflow
Valve 10 is flowed, middle pressurized overflow valve 10 and high pressure tank 11 are connected on pipeline by four-way connection, electro connecting pressure gauge 8 and middle pressure
Relief valve 9 is connected on pipeline by four-way connection.
Preferably, middle pressure table 12 is installed, middle pressure table 12 passes through three between above-mentioned pressure-reducing valve 5 and filter 4 on connecting pipe
Pass joint is connected on pipeline.
Preferably, above-mentioned gas high pressure pressurized cylinder 13 is set multiple, is connected to respectively by three-way connection on pipeline.
Preferably, high pressure gauge 14, high pressure gauge are connected with pipeline between above-mentioned high-pressure stop valve 36 and high-pressure stop valve 4 31
14 and high-pressure decompression valve 15 be connected to by four-way connection on pipeline.
Preferably, pressure sensor 2 30 is connected with by four-way connection at the efferent duct of aforesaid liquid pressurized cylinder 29.
Liquid pressurized cylinder as shown in Figure 2, the liquid pressurized cylinder are a hand screw plunger pumps, and it is needed suitable for those
Small volumes of liquids is compressed to establish the occasion of pressure.0~200MPa of pressure range.It is all and liquid contact portion
Material is all 316 stainless steels and 17-4PH stainless steels.Liquid pressurized cylinder is easily installed on workbench, by operator with very
Small power can establishes maximum pressure.
The liquid pressurized cylinder is screw plunger pressure structure, drives plunger to realize pressurization by the spiral movement of screw rod, from
And realize that fluid flows out, the front end of pump is sealed plunger structure, and rear end is screw-rod structure, without calibration gauge when the force (forcing) pump dispatches from the factory
Measuring mechanism, can not accurate measurement force (forcing) pump output fluid volume.Therefore in order to accurately measure and control the fluid volume pumped out,
Above-mentioned high pressure generator is simply transformed.Modification scheme is as follows, and a dial, dial are installed at rotary handle
Center is overlapped with piston rod axis, and a microlaser, the vertical face scale of light path of laser are installed on fixed support
Disk high scale, laser hot spot is small and collimation is good, and spot diameter is not more than 0.5 mm, and pointing accuracy is high, passes through dial
The facula position of rotating cycle and laser, so as to conveniently and efficiently calculate the fluid volume of outflow.For example, liquid
Pressurized cylinder known volume is 12 ml, 6 inches of length of stroke, and rotary handle often rotates 14 circles, 1 inch of plunger advancement, then handle revolves
Turn around, pumped fluid volumes are 0.142857 mL, and rotary handle degree of rotation pumped fluid volumes are 0.396825 μ L, i.e.,
The fluid volume of outflow can be calculated by the angular dimension of rotation.
In liquid pressurized cylinder figure：The 1- pump housings, 2- pistons, 3- piston rods, 4- rotary handles, 5- dials, 6- lasers,
8- bearings, 9- pump housing supports, 10- threaded portions, the long screws of 11-, 12- nuts.
Preferably, the pressure method of above-mentioned a kind of fluid power plant for accurately controlling pressure, this method include following
Step：
（1）When not doing experiment usually, promote booster pump to be pressurized repeatedly by hydraulic station, produce a high-voltage power supply, Chu Gao
Press in air accumulator, used for rear end；
（2）35MPa tests below:Using two gas high pressure pressurized cylinder leading screws all compress, close high-pressure decompression valve, in
Relief valve and high-pressure stop valve two are pressed, opens high-pressure stop valve three, high-pressure stop valve four and middle pressure cutoff valve, regulation clockwise subtracts
Pressure valve, pressure increase, pressure-reducing valve is adjusted counterclockwise, pressure reduces, pressure reduction, after reaching 30MPa by pressure-reducing valve supercharging,
Pressure cutoff valve in closing, by rollback gas high pressure pressurized cylinder, two pressurized cylinders retract, and first cylinder can be from by pressure change
29.1MPa is down to 9MPa, and pressure change can be down to 5.3MPa by second cylinder from 9MPa；
（3）35~more than 100MPa is tested：In step 2）35MPa tests below on the basis of, two gas high pressures increase
The leading screw of cylinder pressure all retracts, and closes high-pressure stop valve three and high-pressure stop valve two, adjusts gas high pressure pressurized cylinder, pressure clockwise
Power increase, gas high pressure pressurized cylinder is adjusted counterclockwise, pressure is reduced, and pressure is higher, and each anglec of rotation is smaller.Start pressurize,
If pressure maintaining period pressure has fluctuation, can be finely tuned by gas high pressure pressurized cylinder to maintain pressure stability, two gas high pressures
Pressurized cylinder compresses successively, pressure can be forced into 100MPa from 30MPa, two gas high pressure pressurized cylinders retract successively, can also
Pressure is down to 30MPa from 100MPa；
（4）Close high-pressure stop valve two, open high-pressure stop valve for the moment, the handle of rotate counterclockwise liquid pressurized cylinder is with general
Liquid is sucked in the hydraulic cavities of liquid pressurized cylinder from normal-pressure liquid container, then by high-pressure stop valve one and high-pressure stop valve four
Closing, high-pressure stop valve two are opened, and the handle for the liquid pressurized cylinder that turns clockwise with the liquid of compression hydraulic intracavitary and produces height
Pressure is transported in workpiece to be pressurised；
（5）If step（4）Middle liquid pressing deficiency setting value, can be with repeat step（4）Until reaching given threshold；
（6）Step（4）In when in the timing of workpiece temperature to be pressurised one, workpiece to be pressurised pressure be also certain, if needed
When the pressure is adjusted independently of temperature without being pumped into fresh liquid again, then need to treat pressurization inside workpiece add it is lazy
Property gas, i.e., according to above-mentioned steps（1）-（3）Inert gas supercharging is added, treats in pressurization workpiece and carries out gas boosting.
It is pressurized pump hydraulic station part operation step：
1）From pouring orifice, hydraulic station fuel tank is filled into 46# antiwear hydraulic oils；
2）Gas cylinder air pressure is accessed into supercharging pumping hole by flexible pipe；
3）By three phase mains access electric box relevant position；
4）Close stop valve and relief valve；Stop valve can also be opened, allows pressure to be sent on operating platform；
5）There is individual remote control button box on the operational platform；
6）Electric switch button is opened, stop button indicator lamp lights, and shows that power work is normal；
7）Start button, electric motor starting, supercharging start；Reversal valve commutates back and forth, promotes booster pump supercharging；
8）Stop button, motor stop, and booster pump stops supercharging；
9）Electro connecting pressure gauge is arranged to 35MPa before dispatching from the factory, after booster pump is pressurized to 35MPa, electro connecting pressure gauge is sent out
Stop signal, motor stop, and booster pump stops supercharging.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
- A kind of 1. fluid power plant for accurately controlling pressure, it is characterised in that：Including being parallel-connected to pressure port（7）Gas Body pressure piping system and liquid pressure piping system, gas boosting pipe-line system include the gas cylinder being sequentially connected（1）, booster pump （2）, middle pressure cutoff valve（3）, filter（4）, pressure-reducing valve（5）With high-pressure stop valve three（6）With high-pressure stop valve four（31）, supercharging Pump（2）Pressure cutoff valve in connection（3）Between be connected with middle pressure relief valve on pipeline（9）And high pressure tank（11）, high-pressure stop valve Three（6）With high-pressure stop valve four（31）Between be connected with gas high pressure pressurized cylinder on pipeline（13）And high-pressure decompression valve（15）, liquid Pressure piping system includes the normal-pressure liquid container being sequentially connected（26）, high-pressure stop valve one（27）With high-pressure stop valve two （28）, high-pressure stop valve one（27）With high-pressure stop valve two（28）Between be connected with liquid pressurized cylinder on pipeline（29）.
- A kind of 2. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：Booster pump （2）Pass through reversal valve（16）It is connected to electrodynamic pump（17）, electrodynamic pump（17）It is connected to fuel tank（18）.
- A kind of 3. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：Middle pressure cut-off Valve（3）And filter（4）Between pass through high pressure line（19）Connection.
- A kind of 4. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：Reversal valve （16）, electrodynamic pump（17）And electro connecting pressure gauge（8）ATS controllers are connected to, ATS controllers are connected to remote-control handle（20）.
- A kind of 5. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：Booster pump （2）Pressure cutoff valve in connection（3）Between be connected with electro connecting pressure gauge on pipeline（8）With middle pressurized overflow valve（10）, middle pressurized overflow valve （10）And high pressure tank（11）It is connected to by four-way connection on pipeline, electro connecting pressure gauge（8）With middle pressure relief valve（9）It is logical Four-way connection is crossed to be connected on pipeline.
- A kind of 6. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：Pressure-reducing valve （5）And filter（4）Between middle pressure table is installed on connecting pipe（12）, middle pressure table（12）Pipeline is connected to by three-way connection On.
- A kind of 7. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：Gas high pressure Pressurized cylinder（13）Set multiple, be connected to respectively by three-way connection on pipeline.
- A kind of 8. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：High-pressure stop Valve three（6）With high-pressure stop valve four（31）Between be connected with high pressure gauge on pipeline（14）, high pressure gauge（14）And high-pressure decompression valve（15） It is connected to by four-way connection on pipeline.
- A kind of 9. fluid power plant for accurately controlling pressure according to claim 1, it is characterised in that：Liquid is pressurized Cylinder（29）Pressure sensor two is connected with by four-way connection at efferent duct（30）.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720634514.1U CN206801987U (en) | 2017-06-02 | 2017-06-02 | A kind of fluid power plant for accurately controlling pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720634514.1U CN206801987U (en) | 2017-06-02 | 2017-06-02 | A kind of fluid power plant for accurately controlling pressure |
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| CN206801987U true CN206801987U (en) | 2017-12-26 |
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| CN201720634514.1U Active CN206801987U (en) | 2017-06-02 | 2017-06-02 | A kind of fluid power plant for accurately controlling pressure |
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- 2017-06-02 CN CN201720634514.1U patent/CN206801987U/en active Active
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