CN107153435B - For test medium can two-way flow compress control method - Google Patents
For test medium can two-way flow compress control method Download PDFInfo
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- CN107153435B CN107153435B CN201610740476.8A CN201610740476A CN107153435B CN 107153435 B CN107153435 B CN 107153435B CN 201610740476 A CN201610740476 A CN 201610740476A CN 107153435 B CN107153435 B CN 107153435B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/02—Modifications to reduce the effects of instability, e.g. due to vibrations, friction, abnormal temperature, overloading or unbalance
Abstract
The invention discloses for test medium can two-way flow compress control method, belong to technical field of hydraulic test.Boosting rectifier control process is to close water outlet shut-off valve, unloading valve and water inlet shut-off valve in the present invention；Control plunger is moved to behind preceding dead point retracts rear dead point again, and control plunger advancement is pressurizeed；Holding pressure control process is to open water outlet shut-off valve after control pressurer system reaches goal pressure, and plunger be moved forward and backward according to pressure feedback by controller reaches constant pressure requirement；It is depressured after the completion of control process is holding pressure control process, opens water outlet shut-off valve, control plunger retreats, and operating pressure and plunger cavity pressure are equal and slowly decline, pressure maintaining again in pressure reduction；Plunger falls back on rear dead point, and when not dropping to normal pressure, controllable plunger and Inlet and outlet water shut-off valve operate repeatedly, reaches decompression purpose.Rate of pressure rise and rate of pressure reduction can be effectively controlled in control method of the invention；Control precision reaches ± 0.02MPa, can continuously boost and continuously be depressured.
Description
The application be the applying date be on December 10th, 2014, application No. is 201410750927.7, it is entitled " a kind of
Test medium can two-way flow control pressurer system and method " application divisional application.
Technical field
The present invention relates to technical field of hydraulic test, especially a kind of to utilize the two-way flow of plunger pump working media, to have
The Pressure Control Technology of effect control rate of pressure rise and rate of pressure reduction or constant pressure.
Background technique
Pressure test technology is to utilize high-voltage power supply occurrence of equipment (abbreviation host, replaced below with host) by test medium
Injection subject container, is increased pressure testing container inner pressure, intensity, the purpose of sealing performance of pressure testing container is detected with this.It is walked
Suddenly the processes such as water filling, boosting, pressure maintaining, release are generally comprised, technical requirements meet JB/T12013-2014 " automatic control pressure testing machine "
Standard content.It generally uses electric pressure test pump or pneumatic test pump as host at present, is carried out using check valve or shut-off valve
Pressure maintaining carries out release with unloading valve.
Currently, the pressure test technical principle of existing hydraulic test pump is as shown in Figure 1, existing hydraulic test pump control principle passes through column
The reciprocating motion of plug opens and closes inlet valve 17 and outlet valve 16 alternately, and the medium in water tank is become high extrusion from low pressure water inlet P1
Water P2；By close boosting rectifier control valve 12, close container unloading valve 15, high pressure water outlet will be transported to by check valve 14 container into
Row boosting；By opening boosting rectifier control valve 12 or stop plunger movement, system stops boosting and enters pressure maintaining, closes boosting rectifier control
Valve 12 boosts again, can realize boosting, pressure maintaining repeatedly by this operation；Open the 15 feasible system release of container unloading valve.
Existing pressure test technical controlling precision can reach ± 0.5MPa, can satisfy most of not high to control precision
Container resistance test, sealing detection, deformation detection, explosion bulge test etc. require.But it is in place of existing technical deficiency: 1, right
The rate of pressure rise of boost process is not easily achieved accurate control；2, effective control can not achieve to pressure reduction, is unable to complete decompression
The pressure drop stage control of pressure maintaining again afterwards；3, when pressure maintaining, since medium is unable to reverse flow, only there is unidirectional ftercompction, do not have drop
Pressure makes system pressure maintain invariable function；4, control precision is difficult to improve again.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, providing a kind of test medium can two-way flow
Compress control method mainly solves the technical issues of prior art is not easily achieved accurate control to rate of pressure rise；It also solves existing
Technology can not achieve effective control to pressure reduction, be unable to complete after decompression the pressure drop stage control technology problem of pressure maintaining again；Also
The prior art is solved in pressure maintaining, since medium is unable to reverse flow, only there is unidirectional ftercompction, not having decompression makes system pressure
Maintain invariable technical problem；It also solves pressure controling precision in the prior art and is difficult to the technical issues of improving again.It utilizes
The shut-off valve of opening and closing is forced to replace inlet/outlet valve, it is mobile to realize that medium can forward and reverse to control plunger by pressure feedback
Flowing, reaching rate of pressure rise and rate of pressure reduction can be effectively controlled；It can precisely control pressure, control precision reaches ±
0.02MPa；Automatic compensation or decompression are with stability contorting pressure；Break through the technical level of conventional pressure measuring technology.
The technical solution adopted by the invention is as follows:
Test medium of the invention can two-way flow control pressurer system, subject container and water tank between be connected with to
A few control pressure line, the control pressure line include plunger cavity, inlet tube and outlet tube, and cooperation is equipped with column in the plunger cavity
Plug, the plunger cavity are connected to subject container by outlet tube, and the outlet tube is equipped with water outlet shut-off valve；The plunger cavity is logical
It crosses inlet tube and is connected to water tank, the inlet tube is equipped with water inlet shut-off valve, the pressure control for being discharged shut-off valve and being tested between container
Pipeline is equipped with unloading valve.
Due to above structure, in terms of existing technologies, the present invention replaces Inlet and outlet water using the shut-off valve of pressure opening and closing
Valve, by pressure feedback control plunger it is mobile to realize medium can forward and reverse flow, and simultaneously can by shut-off valve with
The cooperation linkage of plunger achievees the purpose that control pressure and pressure drop stage；So that the present invention is on the basis of having existing capability,
It is able to achieve the accurate control of rate of pressure rise and rate of pressure reduction；Pressure can be precisely controlled, control precision reaches ± 0.02MPa；
Automatic compensation or decompression system can be made to maintain invariable pressure in pressure maintaining；Pressure reduction can effectively be controlled,
Complete the pressure drop stage function of pressure maintaining again after decompression.Therefore present invention mainly solves the rate of pressure rise of the prior art to be not easily achieved
The technical issues of accurate control；Also solving the prior art can not achieve effective control to pressure reduction, be unable to complete after decompression again
The pressure drop stage control technology problem of pressure maintaining；The prior art is also solved in pressure maintaining, since medium is unable to reverse flow, is only had
Unidirectional ftercompction, not having decompression makes system pressure maintain invariable technical problem；Also solve pressure control in the prior art
Precision is difficult to the technical issues of improving again.
Test medium of the invention can two-way flow control pressurer system, be connected with plunger cavity pressure on the plunger cavity
Sensor, the outlet tube are equipped with container pressure sensor, and the plunger is equipped with plunger position detection device；The plunger
Cavity pressure sensor, container pressure sensor and plunger position detection device connect and transmit signal to controller, the control
Device processed is connected and has been controlled into water shut-off valve, water outlet shut-off valve and plunger.
Due to above structure, plunger position detection device, unloading valve in the present invention, plunger cavity pressure sensor are optional
Element, plunger position detection device is for judging automatically plunger position；Unloading valve can direct discharge system pressure；Plunger cavity pressure
Force snesor, in plunger indentation, can be then turned on for judging plunger cavity pressure when plunger cavity pressure is equal with operating pressure
It is discharged shut-off valve, to guarantee boosting steadily and improve the water outlet shut-off valve service life.And entire pressure is controlled by electronic component and is
Pressure monitor in system is greatly improved control precision, by controller come the increasing of the entire control pressurer system of automation control
Pressure, pressure maintaining and the control of decompression (namely to water inlet shut-off valve, water outlet shut-off valve and automatic control of plunger open and close), behaviour
Make extremely easy, easy to use, suitable popularization and application.
Test medium of the invention can two-way flow control pressurer system, subject container and water tank between be connected with to
A control pressure line less, the control pressure line include plunger cavity and cross liquid pipe, and subject container is connect by the liquid pipe of crossing with water tank,
The liquid pipe of crossing is equipped with water outlet shut-off valve and water inlet shut-off valve, described to cross between liquid pipe upper water-out shut-off valve and water inlet shut-off valve
Position be connected with plunger cavity, cooperation is equipped with plunger in the plunger cavity；The plunger cavity, which is connected to subject by outlet tube, to be held
Device, the outlet tube are connected to subject container, wherein being equipped with outlet valve at the outlet tube of the plunger cavity；And/or the plunger
Chamber is connected to water tank by inlet tube, is equipped with inlet valve at the inlet tube of the plunger cavity；Be discharged shut-off valve and subject container it
Between control pressure line be equipped with unloading valve.
Due to above structure, design of the invention can be applied to and the structure of existing hydraulic test pump is improved, to reduce
Production cost；The structure of existing hydraulic test pump can specifically be retained are as follows: the plunger cavity is connected to subject container by outlet tube, described
Outlet tube is connected to subject container, wherein being equipped with outlet valve at the outlet tube of the plunger cavity.Or the plunger cavity by into
Liquid pipe is connected to water tank, is equipped with inlet valve at the inlet tube of the plunger cavity.Or the plunger cavity is connected to by outlet tube
It is tested container, the outlet tube is connected to subject container, wherein being equipped with outlet valve, the plunger at the outlet tube of the plunger cavity
Chamber is connected to water tank by inlet tube, is equipped with inlet valve at the inlet tube of the plunger cavity.It therefore can be to the more of existing hydraulic test pump
Kind structure is transformed and improves, and can solve the container of the prior art in pressure maintaining period, and by external action, (such as heating becomes
Shape etc.) pressure rise, system do not have and reduces pressure the technical issues of carrying out constant pressure；It also solves the prior art some are needed to carry out
The technical issues of pressure test of segmentation step pressure reducing is unable to satisfy required precision；Also solve pressure controling precision in the prior art
It is difficult to the technical issues of improving again；Design through the invention can be passed through using forcing the shut-off valve of opening and closing to replace inlet/outlet valve
Pressure feedback control plunger it is mobile to realize medium can forward and reverse flowing, reach the control of control pressure and pressure drop stage
System；On the basis of having existing capability, pressure can be precisely controlled, control precision reaches ± 0.02MPa；Automatic compensation or
Decompression is with stability contorting pressure；Accurate decompression control function, breaks through the technical level of conventional pressure measuring technology.
Test medium of the invention can two-way flow control pressurer system, be parallel between subject container and the water tank
Two or more independent control pressure lines, the alternating movement wherein plunger in the control pressure line can cooperate.
Due to above structure, two or more independent control pressure lines are mutual and are connected between subject container and water tank, and
Plunger mutual cooperation alternating movement therein, so that just form effective cooperation between plunger, when wherein plunger is preceding
When dead point, remaining plunger reaches remaining position, and a plurality of control pressure line can be made simultaneously continuously to carry out boosting and buck functionality, thus
Greatly increase the efficiency of boosting and decompression.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve and unloading valve, open water inlet shut-off valve；It is mobile to control plunger
During retracting rear dead point again after to preceding dead point, medium will be drawn into plunger cavity from water tank by shut-off valve of intaking；It closes
Water inlet shut-off valve opens water outlet shut-off valve, controls plunger advancement, and medium is pressed into and is tested container by plunger, makes to be tested in container
Pressure rise；If plunger advancement moves to preceding dead point when goal pressure has not yet been reached, water outlet shut-off valve can be closed, water inlet is opened and cuts
Only valve, plunger are retreated again to rear dead point, complete sucking medium movement；Operation is repeated, until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, close
Water outlet shut-off valve is closed, control pressurer system enters state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, control pressurer system
After reaching goal pressure, water outlet shut-off valve is not closed, and shut-off valve of intaking at this time is in close state, and plunger is by controller according to pressure
Force feedback is moved forward and backward, and the forward and reverse flowing of control medium reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve, water inlet shut-off valve simultaneously, allows medium
Return to water tank off-load；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet cut-off
Valve；It controls plunger to retreat, operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate plunger fortune during decline at any time
It is dynamic to carry out pressure maintaining again in pressure reduction；Dead point after plunger is fallen back on when operating pressure does not drop to normal pressure also, can close water outlet cut-off
Valve opens water inlet shut-off valve, and plunger cavity pressure is equal with the intake pressure of normal pressure at this time；Plunger motion is controlled to preceding dead point, is closed
It closes into water shut-off valve, opens water outlet shut-off valve, keep operating pressure and plunger cavity pressure equal again；Operation reaches decompression control repeatedly
Purpose processed.
Due to the above method, can to entire control pressurer system boosting, pressure maintaining in the process of running, especially for
Pressure drop stage control, breaching traditional technology can not be to decompression control technology problem, so that solving the prior art needs some
Carry out pressure test the technical issues of being unable to satisfy required precision of segmentation step pressure reducing；Additionally by the cut-off of enforced opening
Valve replaces inlet/outlet valve, by pressure feedback control plunger it is mobile to realize medium can forward and reverse flow, reach control
The control of pressure and pressure drop stage；On the basis of having existing capability, pressure can be precisely controlled, control precision reaches ±
0.02MPa；Automatic compensation or decompression are with stability contorting pressure；Accurate decompression control function, breaks through conventional pressure measuring technology
Technical level.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process, the outlet tube in the control pressurer system by being connected to subject container,
Described in plunger cavity outlet tube at be equipped with outlet valve；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve and unloading valve, open water inlet shut-off valve, control plunger is mobile
During retracting rear dead point again after to preceding dead point, medium will be drawn into plunger cavity from water tank by shut-off valve of intaking；It closes
Water inlet shut-off valve, when controlling plunger advancement, outlet valve automatically turns under differential pressure action, and medium is pressed into subject container by plunger,
Make the pressure rise being tested in container；If plunger advancement moves to preceding dead point when goal pressure has not yet been reached, water inlet can be opened and cut
Only valve, plunger are retreated again to rear dead point, complete sucking medium movement；Operation is repeated, until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, i.e.,
Into state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, after control pressurer system reaches goal pressure, water outlet cut-off is opened
Valve, shut-off valve of intaking at this time are in close state, and plunger is moved forward and backward by controller according to pressure feedback, and medium is controlled
Forward and reverse flowing reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve, water inlet shut-off valve simultaneously, allows medium
Return to water tank off-load；；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet cut-off
Valve；It controls plunger to retreat, operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate plunger fortune during decline at any time
It is dynamic to carry out pressure maintaining again in pressure reduction；Dead point after plunger is fallen back on when operating pressure does not drop to normal pressure also, can close water outlet cut-off
Valve opens water inlet shut-off valve, and plunger cavity pressure is equal with the intake pressure of normal pressure at this time；Plunger cavity pressure is less than operating pressure,
Outlet valve is in close state, control plunger motion to preceding dead point, closes water inlet shut-off valve, is opened water outlet shut-off valve, is made work
Pressure and plunger cavity pressure are equal again；Operation reaches decompression control purpose repeatedly.
Due to the above method, improved hydraulic test pump can be accurately controlled, especially boosting, pressure maintaining and segmentation
Decompression control, so that original hydraulic test pump on the basis of keeping rapid pressure, equally can break through traditional skill after improving
Art can not to decompression control technology problem, solve the prior art to some carry out be segmented step pressure reducing pressure test without
Method meets the technical issues of required precision；Inlet/outlet valve is replaced additionally by the shut-off valve of enforced opening, to realize that medium can
Forward and reverse flowing, reaches the control of control pressure and pressure drop stage；It, can be more accurately on the basis of having existing capability
Pressure is controlled, control precision reaches ± 0.02MPa；Automatic compensation or decompression are with stability contorting pressure；Accurate decompression control function
Can, break through the technical level of conventional pressure measuring technology.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process, the plunger cavity in the control pressurer system are connected to water tank by inlet tube,
Inlet valve is equipped at the inlet tube of the plunger cavity；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve and unloading valve, open water inlet shut-off valve, control plunger is mobile
To after preceding dead point, water inlet shut-off valve is closed, during control plunger retracts rear dead point, medium will be inhaled from water tank by inlet valve
Enter into plunger cavity；When controlling plunger advancement, inlet valve is automatically closed under differential pressure action, opens water outlet shut-off valve, and plunger will
Medium makes the pressure rise being tested in container by water outlet shut-off valve indentation subject container；If plunger advancement moves to preceding dead point
When goal pressure has not yet been reached, plunger is retreated again to rear dead point, and inlet valve automatically turns under differential pressure action, is completed sucking and is situated between
Matter movement；Operation is repeated, until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, i.e.,
Into state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, after control pressurer system reaches goal pressure, water outlet cut-off is opened
Valve, shut-off valve of intaking at this time are in close state, are moved forward and backward by controller according to pressure feedback, control medium is positive and negative
Reach constant pressure requirement to flowing；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve, water inlet shut-off valve simultaneously, allows medium
Return to water tank off-load；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet cut-off
Valve, plunger cavity pressure are greater than intake pressure, and inlet valve is in close state；It controls plunger to retreat, operating pressure and plunger cavity pressure
Power is equal and slowly declines, and can terminate plunger motion during decline at any time and carry out pressure maintaining again in pressure reduction；When plunger is fallen back on
Dead point afterwards when operating pressure does not drop to normal pressure also, can close water outlet shut-off valve, open water inlet shut-off valve, at this time plunger cavity pressure
It is equal with the intake pressure of normal pressure；Plunger motion is controlled to preceding dead point, water inlet shut-off valve is closed, opens water outlet shut-off valve, make work
Make pressure and plunger cavity pressure is equal again；Operation reaches decompression control purpose repeatedly.
Due to the above method, improved hydraulic test pump can be accurately controlled, especially boosting, pressure maintaining and segmentation
Decompression control, so that original hydraulic test pump is after improving, it, equally can be on the basis of keeping medium to rapidly enter plunger cavity
The prior art can not be solved and carry out segmentation step pressure reducing to some to decompression control technology problem by breaking through traditional technology
Pressure test is unable to satisfy the technical issues of required precision；Inlet/outlet valve is replaced additionally by the shut-off valve of enforced opening, thus
Realize medium can forward and reverse flowing, reach control pressure and pressure drop stage control；On the basis of having existing capability,
Pressure can be precisely controlled, control precision reaches ± 0.02MPa；Automatic compensation or decompression are with stability contorting pressure；Accurately
It is depressured control function, breaks through the technical level of conventional pressure measuring technology.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process, the outlet tube in the control pressurer system are connected to subject container, wherein institute
It states and is equipped with outlet valve at the outlet tube of plunger cavity；The plunger cavity is connected to water tank, the feed liquor of the plunger cavity by inlet tube
Inlet valve is equipped at pipe；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve, unloading valve and water inlet shut-off valve；Before control plunger is moved to
During retracting rear dead point again behind dead point, inlet valve automatically turns under differential pressure action, and medium will pass through inlet valve from water tank
It is drawn into plunger cavity；Plunger advancement is controlled, outlet valve automatically turns under differential pressure action, and medium is pressed into subject by plunger to be held
Device makes the pressure rise being tested in container；If plunger advancement moves to preceding dead point when goal pressure has not yet been reached, plunger again after
Rear dead point is retreated to, sucking medium movement is completed；Operation is repeated, until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, i.e.,
Into state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, after control pressurer system reaches goal pressure, water outlet cut-off is opened
Valve, shut-off valve of intaking at this time are in close state, and plunger is moved forward and backward by controller according to pressure feedback, and medium is controlled
Forward and reverse flowing reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve, water inlet shut-off valve simultaneously, allows medium
Return to water tank off-load；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet cut-off
Valve, plunger cavity pressure are greater than intake pressure, and inlet valve is in close state；It controls plunger to retreat, operating pressure and plunger cavity pressure
Power is equal and slowly declines, and can terminate plunger motion during decline at any time and carry out pressure maintaining again in pressure reduction；When plunger is fallen back on
Dead point afterwards when operating pressure does not drop to normal pressure also, can close water outlet shut-off valve, open water inlet shut-off valve, at this time plunger cavity pressure
It is equal with the intake pressure of normal pressure；Plunger cavity pressure is less than operating pressure, and outlet valve is in close state, and control plunger motion arrives
Water inlet shut-off valve is closed at preceding dead point, is opened water outlet shut-off valve, is kept operating pressure and plunger cavity pressure equal again；It operates repeatedly
Reach decompression control purpose.
Due to the above method, improved hydraulic test pump can be accurately controlled, especially boosting, pressure maintaining and segmentation
Decompression control, so that original hydraulic test pump remains the entire infrastructure and function of existing hydraulic test pump, i.e., in system after improving
When boosting, water outlet shut-off valve and water inlet shut-off valve are closed, while quick boost function can be realized, equally can break through biography
System technology can not solve the prior art and survey to some pressure for carrying out segmentation step pressure reducing to decompression control technology problem
The technical issues of examination is unable to satisfy required precision；Inlet/outlet valve is replaced additionally by the shut-off valve of enforced opening, it is anti-by pressure
Feedback control plunger it is mobile to realize medium can forward and reverse flowing, reach the control of control pressure and pressure drop stage；Having
On the basis of standby existing capability, pressure can be precisely controlled, control precision reaches ± 0.02MPa；Automatic compensation or decompression with
Stability contorting pressure；Accurate decompression control function, breaks through the technical level of conventional pressure measuring technology.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process are parallel with two between the subject container and water tank in the control pressurer system
Independent control pressure line A and control pressure line B, wherein plunger in two control pressure lines and alternating movement can be carried out simultaneously；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve and unloading valve, open water inlet shut-off valve；In control pressure line A
During control plunger is moved to behind preceding dead point and retracts rear dead point again, medium will be drawn into column from water tank by water inlet shut-off valve
When filling in chamber, plunger moves again to preceding dead point after retracting rear dead point in control pressure line B；Water inlet shut-off valve is closed in control pressure line A, is opened
Water outlet shut-off valve is opened, dead point is mobile forward from rear dead point for control plunger, and medium is pressed into subject container by plunger, makes to be tested in container
Pressure rise when, the plunger in control pressure line B is moved to behind preceding dead point retracts rear dead point again, and medium will pass through water inlet from water tank
Shut-off valve is drawn into plunger cavity；If the plunger advancement in control pressure line A moves to preceding dead point when goal pressure has not yet been reached, can close
It closes in control pressure line A and is discharged shut-off valve, open control pressure line A water inlet shut-off valve, while opening water outlet cut-off in control pressure line B
Valve, dead point is mobile forward from rear dead point for control plunger, and medium is pressed into subject container by plunger；Plunger is again in control pressure line A simultaneously
It is secondary to retreat to rear dead point, complete sucking medium movement；Operation is repeated, control pressure line A and control pressure line B are alternately pressurized, rise
Continuous uninterrupted boosting can be realized by pressing through journey, until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, close
Water outlet shut-off valve is closed, control pressurer system enters state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, control pressurer system
After reaching goal pressure, water outlet shut-off valve is not closed, and shut-off valve of intaking at this time is in close state, control pressure line A and pressure control pipe
Plunger in line B can be individually or simultaneously moved forward and backward, and the forward and reverse flowing of control medium reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve, water inlet shut-off valve simultaneously, allows medium
Return to water tank off-load；When subject container need to control pressure reduction, unlatching water outlet shut-off valve, controls column in control pressure line A
Plug retreats, and operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate at any time plunger motion during decline and be dropped
Pressure maintaining again during pressure, at the same time, the water outlet shut-off valve in control pressure line B are closed, and water inlet shut-off valve is opened；
The dead point after plunger in control pressure line A is fallen back on when operating pressure does not drop to normal pressure also, can close water outlet cut-off
Valve opens water inlet shut-off valve, and plunger cavity pressure is equal with the intake pressure of normal pressure at this time, at the same time, opens in control pressure line B
It is discharged shut-off valve, plunger retreats, and operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate column during decline at any time
Plug movement carries out pressure maintaining again in pressure reduction；
The dead point after plunger in control pressure line B is fallen back on, column when operating pressure does not drop to normal pressure also, in control pressure line A
Plug moves to preceding dead point, closes water inlet shut-off valve, opens water outlet shut-off valve, keeps operating pressure and plunger cavity pressure equal again；
It operates repeatedly, control pressure line A and control pressure line B alternating movement, pressure reduction can realize continuous uninterrupted decompression, reach decompression control
Purpose processed.
, can be by the alternating movement of two plungers due to the above method, two plunger motion directions are exactly the opposite, i.e. left side column
For plug at preceding dead point, the right plunger is at rear dead point, it is ensured that continuous boosting, buck functionality；Liter in two of them control pressure line
Pressure, buck functionality carry out simultaneously, are greatly improved the efficiency of boosting and decompression, reduce the operating time, save human cost.Simultaneously
The prior art can not be solved and carry out segmentation step pressure reducing to some to decompression control technology problem by breaking through traditional technology
Pressure test is unable to satisfy the technical issues of required precision；Inlet/outlet valve is replaced additionally by the shut-off valve of enforced opening, is passed through
Pressure feedback control plunger it is mobile to realize medium can forward and reverse flowing, reach the control of control pressure and pressure drop stage
System；On the basis of having existing capability, pressure can be precisely controlled, control precision reaches ± 0.02MPa；Automatic compensation or
Decompression is with stability contorting pressure；Accurate decompression control function, breaks through the technical level of conventional pressure measuring technology.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, test medium of the invention can two-way flow control pressurer system and method, mainly solve the prior art appearance
Device (such as heats, deforms) pressure rise in pressure maintaining period, by external action, and system does not have reduction pressure and carrys out constant pressure
Technical problem；It also solves the prior art and required precision is unable to satisfy to some pressure tests for carrying out segmentation step pressure reducing
Technical problem；It also solves pressure controling precision in the prior art and is difficult to the technical issues of improving again；
2, test medium of the invention can two-way flow control pressurer system and method, utilize force opening and closing shut-off valve
Instead of inlet/outlet valve, by pressure feedback control plunger it is mobile to realize medium can forward and reverse flow, reach control pressure
The control of power and pressure drop stage；On the basis of having existing capability, pressure can be precisely controlled, control precision reaches ±
0.02MPa；Automatic compensation or decompression are with stability contorting pressure；Accurate decompression control function, breaks through conventional pressure measuring technology
Technical level.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is the pressure testing pump control system schematic diagram of the prior art；
Fig. 2 is the structural schematic diagram of embodiment 1 in the present invention；
Fig. 3 is the structural schematic diagram of embodiment 2 in the present invention；
Fig. 4 is the structural schematic diagram of embodiment 3 in the present invention；
Fig. 5 is the structural schematic diagram of embodiment 4 in the present invention；
Fig. 6 is the structural schematic diagram of embodiment 5 in the present invention.
Marked in the figure: 11- stage columnar plug, 12- boosting rectifier control valve, 13- pressure transmitter, 14- check valve, 15- container unload
Lotus valve, 16- outlet valve, 17- inlet valve, 18- water tank；21- plunger position detection device, 22- plunger, 23- are discharged shut-off valve,
24- container pressure sensor, 25- unloading valve, 26- plunger cavity pressure sensor, 27- water inlet shut-off valve, 28- water tank, 29- water inlet
Valve, 30- outlet valve, 31- check valve, the water inlet of P1- low pressure, P2- plunger cavity pressure, P3- operating pressure.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract), unless specifically stated,
It is replaced by other equivalent or with similar purpose alternative features.That is, unless specifically stated, each feature is a series of
An example in equivalent or similar characteristics.
Embodiment 1
As shown in Fig. 2, test medium of the invention can two-way flow control pressurer system, in subject container and water tank 28
Between be connected at least one control pressure line, the control pressure line includes plunger cavity, inlet tube and outlet tube, in the plunger cavity
Cooperation is equipped with plunger 22, and the plunger cavity is connected to subject container by outlet tube, and the outlet tube is equipped with water outlet shut-off valve
23；The plunger cavity is connected to water tank 28 by inlet tube, and the inlet tube is equipped with water inlet shut-off valve 27；Be discharged shut-off valve with
The control pressure line being tested between container is equipped with unloading valve.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve 23 and unloading valve 25, open water inlet shut-off valve 27；Control column
Plug 22 is moved to behind preceding dead point retracts rear dead point again, and medium will be drawn into plunger cavity from water tank 28 by shut-off valve 27 of intaking；
Water inlet shut-off valve 27 is closed, water outlet shut-off valve 23 is opened, control plunger 22 advances, and medium is pressed into subject container by plunger 22, makes
The pressure rise being tested in container；If goal pressure has not yet been reached to preceding dead point in 22 forward travel of plunger, water outlet can be closed and cut
Water inlet shut-off valve 27 is opened in only valve 23, and plunger 22 is retreated again to rear dead point, completes sucking medium movement；Operation is repeated,
Until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, close
Water outlet shut-off valve 23 is closed, control pressurer system enters state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, pressure control system
After system reaches goal pressure, water outlet shut-off valve 23 is not closed, shut-off valve 27 of intaking at this time is in close state, and plunger 22 is by controlling
Device is moved forward and backward according to pressure feedback, and the forward and reverse flowing of control medium reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve 25 is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve 23, water inlet shut-off valve 27 simultaneously,
Medium is allowed to return to water tank off-load；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet
Shut-off valve 23；It controls plunger 22 to retreat, operating pressure and plunger cavity pressure are equal and slowly decline, can at any time eventually during decline
Only plunger motion carries out pressure maintaining again in pressure reduction；Dead point after plunger 22 is fallen back on can close when operating pressure does not drop to normal pressure also
Water outlet shut-off valve 23 is closed, opens water inlet shut-off valve 27, plunger cavity pressure is equal with the intake pressure of normal pressure at this time；Control plunger 22
Preceding dead point is moved to, water inlet shut-off valve 27 is closed, water outlet shut-off valve 23 is opened, makes operating pressure and plunger cavity pressure phase again
Deng；Operation reaches decompression control purpose repeatedly.
Embodiment 2
As shown in Fig. 2, embodiment 2 is similar to Example 1, on that basis of example 1, by the pressure monitor in whole system
Induction detection is carried out using sensor, is transferred to control when sensor detects corresponding pressure value and by corresponding signal
Device, controller control shut-off valve therein and plunger according to preset program, realize the automation behaviour entirely controlled
Make, plunger cavity pressure sensor 26 is connected on the specially described plunger cavity, the outlet tube is equipped with container pressure sensor
24, the plunger 22 is equipped with plunger position detection device 21；The plunger cavity pressure sensor 26, container pressure sensor 24
And plunger position detection device 21 connects and transmits signal to controller, the controller is connected and has been controlled into water shut-off valve
27, shut-off valve 23 and plunger 22 are discharged.Plunger position detecting device in system, unloading valve, plunger cavity pressure sensor is can
Element is selected, plunger position detection device is for judging automatically plunger position；Unloading valve can direct discharge system pressure；Plunger cavity
Pressure sensor, can be when plunger cavity pressure be equal with operating pressure in plunger indentation for judging plunger cavity pressure, then opens
Water outlet shut-off valve is opened, to guarantee boosting steadily and improve the water outlet shut-off valve service life.Therefore the present invention can pass through each sensor pair
The detection of pressure, and after controller then receives each pressure value, carrying out corresponding shut-off valve open and close according to pre-set programs acts,
The movement of plunger is controlled simultaneously, to realize operation automation of the invention.
Embodiment 3
As shown in figure 3, test medium of the invention can two-way flow control pressurer system, in subject container and water tank 28
Between be connected at least one control pressure line, the control pressure line includes plunger cavity and crosses liquid pipe, and the liquid pipe of crossing holds subject
Device is connect with water tank 28, and the liquid pipe of crossing is equipped with water outlet shut-off valve 23 and water inlet shut-off valve 27, and the liquid pipe upper water-out of crossing is cut
Only the position between valve 23 and water inlet shut-off valve 27 is connected with plunger cavity, and cooperation is equipped with plunger 22 in the plunger cavity；The column
It fills in chamber and subject container is connected to by outlet tube, wherein being equipped with outlet valve 30 at the outlet tube of the plunger cavity；The plunger cavity
It is connected to water tank 28 by inlet tube, is equipped with inlet valve 29 at the inlet tube of the plunger cavity；It is discharged shut-off valve and subject container
Between control pressure line be equipped with unloading valve.
It can be seen that present invention preserves the entire infrastructure of existing pump and functions, i.e., when system is boosted, close water outlet shut-off valve
With water inlet shut-off valve, quick boost function can be realized, to constant pressure and buck functionality.
It is of the invention for test medium can two-way flow control pressurer system control method, including boosting rectifier control mistake
Journey, holding pressure control process and decompression control process；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve 23 and unloading valve 25, open water inlet shut-off valve 27；Control column
After plug 22 is moved to preceding dead point, water inlet shut-off valve 27 is closed, during control plunger 22 retracts rear dead point, inlet valve 29 is being pressed
Difference effect is lower to be automatically turned on, and medium will be drawn into plunger cavity from water tank 28 by inlet valve 29；It controls plunger 22 to advance, water outlet
Valve 30 automatically turns under differential pressure action, and medium by indentation subject container, is made the pressure rise being tested in container by plunger 22；
If goal pressure has not yet been reached to preceding dead point in 22 forward travel of plunger, plunger 22 is retreated again to rear dead point, is completed sucking and is situated between
Matter movement；Operation is repeated, until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, i.e.,
Into state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, after control pressurer system reaches goal pressure, water outlet cut-off is opened
Valve 23, shut-off valve 27 of intaking at this time are in close state, and plunger 22 is moved forward and backward by controller according to pressure feedback, control
The forward and reverse flowing of medium reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve 25 is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve 23, water inlet shut-off valve 27 simultaneously,
Medium is allowed to return to water tank off-load；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet
Shut-off valve 23, plunger cavity pressure are greater than intake pressure, and inlet valve 29 is in close state；It controls plunger 22 to retreat, operating pressure
It is equal with plunger cavity pressure and slowly decline, plunger motion can be terminated during decline at any time and carries out pressure maintaining again in pressure reduction；
Dead point after plunger 22 is fallen back on when operating pressure does not drop to normal pressure also, can close water outlet shut-off valve 23, open water inlet shut-off valve
27, plunger cavity pressure is equal with the intake pressure of normal pressure at this time；Plunger cavity pressure is less than operating pressure, and outlet valve 30, which is in, closes
State, control plunger 22 move to preceding dead point, close water inlet shut-off valve 27, open water outlet shut-off valve 23, make operating pressure and column
It is equal again to fill in cavity pressure；Operation reaches decompression control purpose repeatedly.
Embodiment 4
As shown in figure 4, test medium of the invention can two-way flow control pressurer system, in subject container and water tank 28
Between be connected at least one control pressure line, the control pressure line includes plunger cavity and crosses liquid pipe, and the liquid pipe of crossing holds subject
Device is connect with water tank 28, and the liquid pipe of crossing is equipped with water outlet shut-off valve 23 and water inlet shut-off valve 27, and the liquid pipe upper water-out of crossing is cut
Only the position between valve 23 and water inlet shut-off valve 27 is connected with plunger cavity, and cooperation is equipped with plunger 22 in the plunger cavity；The column
Plug chamber is connected to water tank 28 by inlet tube, is equipped with inlet valve 29 at the inlet tube of the plunger cavity；It is discharged shut-off valve and subject
Control pressure line between container is equipped with unloading valve.
It can be seen that the present invention remains with the feed liquor function of former hydraulic test pump, medium can be fed to express delivery into plunger cavity.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process, the plunger cavity in the control pressurer system are connected to water tank by inlet tube
28, inlet valve 29 is equipped at the inlet tube of the plunger cavity；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve 23 and unloading valve 25, control plunger 22 is moved to preceding dead point
Retract rear dead point again afterwards, medium will be drawn into plunger cavity from water tank 28 by inlet valve 29；When controlling the advance of plunger 22, water inlet
Valve 29 is automatically closed under differential pressure action, opens water outlet shut-off valve 23, and medium is pressed into quilt by water outlet shut-off valve 23 by plunger 22
Container is tried, the pressure rise being tested in container is made；If goal pressure has not yet been reached to preceding dead point in 22 forward travel of plunger, plunger
22 retreat again to rear dead point, and inlet valve 29 automatically turns under differential pressure action, complete sucking medium movement；Behaviour is repeated
Make, until reaching goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, i.e.,
Into state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, after control pressurer system reaches goal pressure, water outlet cut-off is opened
Valve 23, shut-off valve 27 of intaking at this time are in close state, and plunger 22 is moved forward and backward by controller according to pressure feedback, control
The forward and reverse flowing of medium reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve 25 is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve 23, water inlet shut-off valve 27 simultaneously,
Medium is allowed to return to water tank off-load；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet
Shut-off valve 23, plunger cavity pressure are greater than intake pressure, and inlet valve 29 is in close state；It controls plunger 22 to retreat, operating pressure
It is equal with plunger cavity pressure and slowly decline, the movement of plunger 22 can be terminated during decline at any time and protected again in pressure reduction
Pressure；Dead point after plunger 22 is fallen back on when operating pressure does not drop to normal pressure also, can close water outlet shut-off valve 23, open water inlet cut-off
Valve 27, plunger cavity pressure is equal with the intake pressure of normal pressure at this time；Control plunger 22 moves to preceding dead point, closes water inlet shut-off valve
27, water outlet shut-off valve 23 is opened, keeps operating pressure and plunger cavity pressure equal again；Operation reaches decompression control purpose repeatedly.
Embodiment 5
As shown in figure 5, test medium of the invention can two-way flow control pressurer system, in subject container and water tank 28
Between be connected at least one control pressure line, the control pressure line includes plunger cavity and crosses liquid pipe, and the liquid pipe of crossing holds subject
Device is connect with water tank 28, and the liquid pipe of crossing is equipped with water outlet shut-off valve 23 and water inlet shut-off valve 27, and the liquid pipe upper water-out of crossing is cut
Only the position between valve 23 and water inlet shut-off valve 27 is connected with plunger cavity, and cooperation is equipped with plunger 22 in the plunger cavity；The column
It fills in chamber and subject container is connected to by outlet tube, the outlet tube is connected to subject container, wherein the outlet tube of the plunger cavity
Place is equipped with outlet valve 30；It is discharged shut-off valve and the control pressure line being tested between container is equipped with unloading valve.
It can be seen that the present invention retains the pressurized construction of existing hydraulic test pump, can boost to express delivery.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process, the outlet tube in the control pressurer system are connected to subject container, wherein institute
It states and is equipped with outlet valve 30 at the outlet tube of plunger cavity；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve 23 and unloading valve 25, open water inlet shut-off valve 27, control column
Plug 22 is moved to behind preceding dead point retracts rear dead point again, and medium will be drawn into plunger cavity from water tank 28 by shut-off valve 27 of intaking；
Water inlet shut-off valve 27 is closed, when control plunger 22 advances, outlet valve 30 automatically turns under differential pressure action, and plunger 22 is by medium pressure
Enter to be tested container, makes the pressure rise being tested in container；If goal pressure has not yet been reached to preceding dead point in 22 forward travel of plunger,
Water inlet shut-off valve 27 can be opened, plunger 22 is retreated again to rear dead point, completes sucking medium movement；Operation is repeated, until
Reach goal pressure；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, i.e.,
Into state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, after control pressurer system reaches goal pressure, water outlet cut-off is opened
Valve 23, shut-off valve 27 of intaking at this time are in close state, and plunger 22 is moved forward and backward by controller according to pressure feedback, control
The forward and reverse flowing of medium reaches constant pressure requirement；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve 25 is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve 23, water inlet shut-off valve 27 simultaneously,
Medium is allowed to return to water tank off-load；When subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching water outlet
Shut-off valve 23；It controls plunger 22 to retreat, operating pressure and plunger cavity pressure are equal and slowly decline, can at any time eventually during decline
The only movement of plunger 22 carries out pressure maintaining again in pressure reduction；It dead point after plunger 22 is fallen back on can when operating pressure does not drop to normal pressure also
Water outlet shut-off valve 23 is closed, opens water inlet shut-off valve 27, plunger cavity pressure is equal with the intake pressure of normal pressure at this time；Plunger cavity pressure
Power is less than operating pressure, and outlet valve 30 is in close state, and control plunger 22 moves to preceding dead point, closes water inlet shut-off valve 27,
Water outlet shut-off valve 23 is opened, keeps operating pressure and plunger cavity pressure equal again；Operation reaches decompression control purpose repeatedly.
Embodiment 6
Embodiment 6 is similar to embodiment 3,4 and 5, on the basis of embodiment 3,4 and 5, by the pressure monitor in whole system
Induction detection is carried out using sensor, is transferred to control when sensor detects corresponding pressure value and by corresponding signal
Device, controller control shut-off valve therein and plunger according to preset program, realize the automation behaviour entirely controlled
Make, the specially described liquid pipe of crossing is passed equipped with the position between water outlet shut-off valve 23 and shut-off valve 27 of intaking equipped with plunger cavity pressure
Sensor 26, the liquid pipe of crossing are equipped with container pressure sensor 24, and the plunger 22 is equipped with plunger position detection device 21；Institute
Plunger cavity pressure sensor 26, container pressure sensor 24 and plunger position detection device 21 is stated to connect and transmit signal to control
Device processed, the controller are connected and have been controlled into water shut-off valve 27, water outlet shut-off valve 23 and plunger 22.Plunger position in system
Detection device, unloading valve, plunger cavity pressure sensor are optional element, and plunger position detection device is for judging automatically plunger position
It sets；Unloading valve can direct discharge system pressure；Plunger cavity pressure sensor is pressed into for judging plunger cavity pressure in plunger
When, it can be then turned on water outlet shut-off valve when plunger cavity pressure is equal with operating pressure, to guarantee that boosting is steadily cut with raising water outlet
The only valve service life.Therefore the present invention can detection by each sensor to pressure, and after controller then receives each pressure value, according to
Pre-set programs carry out corresponding shut-off valve open and close movement, while controlling the movement of plunger, to realize operation of the invention
Automation.
Embodiment 7
As shown in fig. 6, two independent control pressure lines are parallel between the subject container in the embodiment and water tank 28,
In the specific control pressure line control pressure line identical namely described with the control pressure line in Examples 1 and 2 include plunger cavity, feed liquor
Pipe and outlet tube, the interior cooperation of the plunger cavity are equipped with plunger 22, and the plunger cavity is connected to subject container by outlet tube, described
Outlet tube is equipped with water outlet shut-off valve 23；The plunger cavity is connected to water tank 28 by inlet tube, the inlet tube be equipped with into
Water shut-off valve 27；It is discharged shut-off valve and the control pressure line being tested between container is equipped with unloading valve.
Wherein the plunger 22 in the control pressure line can cooperate alternating movement.According to this embodiment can by three and its
The above independent control pressure line, which cooperates, to be arranged, while to 22 mutual cooperation alternating movement of plunger therein, while can be passed through
Controller cooperation controls each shut-off valve, to complete the automatic operation of cooperation, it can be ensured that continuous boosting, drop
Press function.
Test medium of the invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and decompression control process are parallel with two between the subject container and water tank 28 in the control pressurer system
Item independent control pressure line A and control pressure line B, wherein the plunger 22 in two control pressure lines can carry out alternating movement simultaneously；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve 23 and unloading valve 25, open water inlet shut-off valve 27；Pressure control pipe
Control plunger 22 is moved to behind preceding dead point in line A retracts rear dead point again, and medium will be sucked from water tank 28 by shut-off valve 27 of intaking
When to plunger cavity, plunger 22 moves again to preceding dead point after retracting rear dead point in control pressure line B；Water inlet is closed in control pressure line A to cut
Water outlet shut-off valve 23 is opened in only valve 27, and dead point is mobile forward from rear dead point for control plunger 22, and medium is pressed into subject by plunger 22 to be held
Device, when making the pressure rise being tested in container, the plunger 22 in control pressure line B is moved to behind preceding dead point retracts rear dead point again, is situated between
Matter will be drawn into plunger cavity from water tank 28 by shut-off valve 27 of intaking；If 22 forward travel of plunger in control pressure line A is to preceding dead
When goal pressure has not yet been reached in point, water outlet shut-off valve 23 in control pressure line A can be closed, opens control pressure line A water inlet shut-off valve 27,
Water outlet shut-off valve 23 is opened in control pressure line B simultaneously, dead point is mobile forward from rear dead point for control plunger 22, and plunger 22 is by medium pressure
Enter to be tested container；Plunger 22 is retreated again to rear dead point in control pressure line A simultaneously, completes sucking medium movement；Behaviour is repeated
Make, control pressure line A and control pressure line B are alternately pressurized, and boost process can realize continuous uninterrupted boosting, until reaching target pressure
Power；
Wherein holding pressure control process are as follows: when being tested container without constant pressure, after control pressurer system reaches goal pressure, close
Water outlet shut-off valve 23 is closed, control pressurer system enters state of pressure keeping；When constant pressure pressure maintaining need to be made by being tested container, pressure control system
System reach goal pressure after, do not close water outlet shut-off valve 23, at this time intake shut-off valve 27 be in close state, control pressure line A and
Plunger 22 in control pressure line B can be individually or simultaneously moved forward and backward, while alternately the forward and reverse flowing of control medium reaches permanent
Pressure request；
Wherein it is depressured control process are as follows:, can after the completion of holding pressure control process when being tested container without pressure reduction control
Unloading valve 25 is directly opened, allows medium by bypass off-load, or directly opens water outlet shut-off valve 23, water inlet shut-off valve 27 simultaneously,
Medium is allowed to return to water tank off-load；When subject container need to control pressure reduction, unlatching is discharged shut-off valve in control pressure line A
23, control plunger 22 retreats, and operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate plunger during decline at any time
Movement carries out pressure maintaining again in pressure reduction, and at the same time, the water outlet shut-off valve 23 in control pressure line B is closed, shut-off valve 27 of intaking
It opens；
The dead point after plunger 22 in control pressure line A is fallen back on when operating pressure does not drop to normal pressure also, can close water outlet cut-off
Valve 23 opens water inlet shut-off valve 27, and plunger cavity pressure is equal with the intake pressure of normal pressure at this time, at the same time, in control pressure line B
Water outlet shut-off valve 23 is opened, plunger 22 retreats, and operating pressure and plunger cavity pressure are equal and slowly decline, can be with during decline
When terminate plunger motion carry out pressure reduction in pressure maintaining again；
The dead point after plunger 22 in control pressure line B is fallen back on, when operating pressure does not drop to normal pressure also, in control pressure line A
Plunger 22 moves to preceding dead point, closes water inlet shut-off valve 27, opens water outlet shut-off valve 23, makes operating pressure and plunger cavity pressure again
It is secondary equal；It operates repeatedly, pressure reduction can realize continuous uninterrupted decompression, reach decompression control purpose.
According to the principle of embodiment 7, control pressure line therein can be used to the structure of above-described embodiment 3,4,5 and 6, control
Method processed can be obtained by embodiment 7.
Shown in sum up, the present invention controls plunger by pressure feedback using forcing the shut-off valve of opening and closing to replace inlet/outlet valve
It is mobile to realize medium can forward and reverse flowing, and can be linked by the cooperation of shut-off valve and plunger reach control pressure simultaneously
The purpose of power and pressure drop stage；So that the present invention on the basis of having existing capability, can precisely control pressure, control essence
Degree reaches ± 0.02MPa；Automatic compensation or decompression are with stability contorting pressure；Accurate decompression control function.Therefore the present invention is main
The container of the prior art is solved in pressure maintaining period, (such as heated, deform) pressure rise by external action, system is not
Having reduces the technical issues of pressure carrys out constant pressure；Also solve the pressure that the prior art carries out segmentation step pressure reducing to some
The technical issues of test is unable to satisfy required precision；It also solves hydraulic test pump control precision in the prior art and is difficult to the skill improved again
Art problem.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (3)
1. for test medium can two-way flow compress control method, which is characterized in that including a kind of control system, be tested
At least one control pressure line is connected between container and water tank (28), the control pressure line includes plunger cavity and crosses liquid pipe, described
It crosses liquid pipe to connect subject container with water tank (28), the liquid pipe of crossing is equipped with water outlet shut-off valve (23) and shut-off valve of intaking
(27), the position crossed between liquid pipe upper water-out shut-off valve (23) and water inlet shut-off valve (27) is connected with plunger cavity, the column
It fills in intracavitary cooperation and is equipped with plunger (22)；The plunger cavity is connected to subject container by outlet tube, wherein the plunger cavity goes out
Outlet valve (30) are equipped at liquid pipe；And/or the plunger cavity is connected to water tank (28), the feed liquor of the plunger cavity by inlet tube
Inlet valve (29) are equipped at pipe, are set on the position between the water outlet shut-off valve (23) for crossing liquid pipe and water inlet shut-off valve (27)
Have plunger cavity pressure sensor (26), the liquid pipe of crossing is equipped with container pressure sensor (24), and the plunger (22) is equipped with
Plunger position detection device (21)；The plunger cavity pressure sensor (26), container pressure sensor (24) and plunger position
Detection device (21) connects and transmits signal to controller, and the controller is connected and controlled into water shut-off valve (27), water outlet
Shut-off valve (23) and plunger (22), control method include boosting rectifier control process, holding pressure control process and decompression control process；
Wherein boosting rectifier control process are as follows: close water outlet shut-off valve (23), unloading valve (25) and water inlet shut-off valve (27)；Control plunger
(22) it is moved to behind preceding dead point during retracting rear dead point again, inlet valve (29) automatically turns under differential pressure action, and medium will
It is drawn into plunger cavity from water tank (28) by inlet valve (29)；It controls plunger (22) to advance, outlet valve (30) is in differential pressure action
Medium is pressed into subject container, makes the pressure rise being tested in container by lower automatic opening, plunger (22)；The fortune if plunger (22) advances
When moving preceding dead point goal pressure has not yet been reached, plunger (22) is retreated again to rear dead point, completes sucking medium movement；Repeatedly into
Row operation, until reaching goal pressure；
Wherein holding pressure control process are as follows: when constant pressure pressure maintaining need to be made by being tested container, after control pressurer system reaches goal pressure, open
Water outlet shut-off valve (23) is opened, water inlet shut-off valve (27) is in close state at this time, and plunger (22) is by controller according to pressure feedback
It is moved forward and backward, the forward and reverse flowing of control medium reaches constant pressure requirement；
Wherein it is depressured control process are as follows: when subject container need to control pressure reduction, after the completion of holding pressure control process, unlatching
It is discharged shut-off valve (23), plunger cavity pressure is greater than intake pressure, and inlet valve (29) is in close state；After controlling plunger (22)
It moves back, operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate plunger motion during decline at any time and be depressured
Pressure maintaining again in journey；Dead point after plunger (22) is fallen back on when operating pressure does not drop to normal pressure also, can close water outlet shut-off valve (23),
Water inlet shut-off valve (27) is opened, plunger cavity pressure is equal with the intake pressure of normal pressure at this time；Plunger cavity pressure is less than operating pressure,
Outlet valve (30) is in close state, and control plunger (22) moves to preceding dead point, closes water inlet shut-off valve (27), is opened water outlet and is cut
Only valve (23) keep operating pressure and plunger cavity pressure equal again；Operation reaches decompression control purpose repeatedly.
2. as described in claim 1 for test medium can two-way flow compress control method, which is characterized in that pressure maintaining control
During system, when being tested container without constant pressure, after control pressurer system reaches goal pressure, that is, enter state of pressure keeping.
3. as described in claim 1 for test medium can two-way flow compress control method, which is characterized in that decompression control
During system, when being tested container without pressure reduction control, after the completion of holding pressure control process, unloading valve can be directly opened
(25), it allows medium by bypass off-load, or directly opens water outlet shut-off valve (23), water inlet shut-off valve (27) simultaneously, medium is allowed to return
Recovery tank off-load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610740476.8A CN107153435B (en) | 2014-12-10 | 2014-12-10 | For test medium can two-way flow compress control method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610740476.8A CN107153435B (en) | 2014-12-10 | 2014-12-10 | For test medium can two-way flow compress control method |
| CN201410750927.7A CN104460726B (en) | 2014-12-10 | 2014-12-10 | Pressure control system and method with pressure test medium capable of conducting bidirectional flow |
Related Parent Applications (1)
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| CN201610739536.4A Active CN106444881B (en) | 2014-12-10 | 2014-12-10 | Test medium can two-way flow compress control method |
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| CN106094913B (en) * | 2016-08-12 | 2023-03-14 | 四川杰特机器有限公司 | Ultrahigh pressure test system and control method thereof |
| CN109709995A (en) * | 2019-03-04 | 2019-05-03 | 中国科学院地球化学研究所 | A kind of high-precision fluid automatic controlling pressure device and its pressure control method |
| CN110208103B (en) * | 2019-06-21 | 2021-10-15 | 哈电集团（秦皇岛）重型装备有限公司 | Pressure vessel hydrostatic test connection control device and method |
| CN110595744B (en) * | 2019-08-04 | 2021-11-02 | 珠海共同低碳科技股份有限公司 | Operation method of strain strengthening process equipment |
| CN112414654A (en) * | 2019-08-22 | 2021-02-26 | 天津大学青岛海洋技术研究院 | Test device for simulating deep sea constant pressure state |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107153435A (en) | 2017-09-12 |
| CN106444881A (en) | 2017-02-22 |
| CN106444882B (en) | 2019-02-05 |
| CN104460726A (en) | 2015-03-25 |
| CN106444880B (en) | 2019-03-22 |
| CN106444881B (en) | 2019-05-24 |
| CN106444883A (en) | 2017-02-22 |
| CN106444882A (en) | 2017-02-22 |
| CN104460726B (en) | 2017-02-01 |
| CN106444883B (en) | 2019-03-22 |
| CN106444880A (en) | 2017-02-22 |
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