CN104460726B - Pressure control system and method with pressure test medium capable of conducting bidirectional flow - Google Patents
Pressure control system and method with pressure test medium capable of conducting bidirectional flow Download PDFInfo
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- CN104460726B CN104460726B CN201410750927.7A CN201410750927A CN104460726B CN 104460726 B CN104460726 B CN 104460726B CN 201410750927 A CN201410750927 A CN 201410750927A CN 104460726 B CN104460726 B CN 104460726B
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- 238000000034 method Methods 0.000 title claims abstract description 155
- 238000012360 testing method Methods 0.000 title claims abstract description 71
- 230000002457 bidirectional effect Effects 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 420
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 230000036772 blood pressure Effects 0.000 claims description 82
- 230000007423 decrease Effects 0.000 claims description 32
- 230000033001 locomotion Effects 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 21
- 238000012856 packing Methods 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 abstract description 22
- 239000013589 supplement Substances 0.000 abstract 1
- 230000011218 segmentation Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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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 imbalance
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Abstract
The invention discloses a pressure control system and method with a pressure test medium capable of conducting bidirectional flow, and belongs to the technical field of hydraulic tests. The pressure control system comprises a container to be tested and a water tank. At least one pressure control pipeline is connected between the container to be tested and the water tank. Each pressure control pipeline comprises a plunger cavity, a liquid inlet pipe and a liquid outlet pipe. The plunger cavities are internally provided with plungers in a matched mode. The plunger cavities are connected to the container to be tested through the liquid outlet pipes. The liquid outlet pipes are provided with water outlet stop valves. The plunger cavities are connected to the water tank through the liquid inlet pipes, and the liquid inlet pipes are provided with water inlet stop valves. According to the pressure control system and method, the stop valves forced to be opened and closed are utilized to replace water inlet valves and water outlet valves, the plungers are controlled to move through pressure feedback so that the medium can flow forward and reversely, and the purpose that the rate of pressure rise and the rate of pressure reduction can be effectively controlled is achieved; the pressure can be controlled more precisely, and the control accuracy reaches +/-0.02 MPa; automatic pressure supplement or pressure reduction is achieved so as to achieve stable control over the pressure; the technological level of a traditional pressure test technology is broken through.
Description
Technical field
The present invention relates to technical field of hydraulic test, especially one kind utilize plunger displacement pump working media two-way flow, to have
Effect controls the Pressure Control Technology of rate of pressure rise and rate of pressure reduction or constant voltage.
Background technology
Stress test technology is equipment (abbreviation main frame is all replaced with main frame below) to occur by test medium using high-voltage power supply
Inject tested container, make the rising of pressure testing container inner pressure, the intensity that pressure testing container is detected with this, the purpose of sealing property.Its step
Suddenly the processes such as water filling, boosting, pressurize, release are generally comprised, its technical requirements meets jb/t12013-2014 " automatic control pressure testing machine "
Standard content.Generally use motor test pump or pneumatic test pump at present as main frame, carried out using check valve or stop valve
Pressurize, carries out release with unloader.
At present, the stress test know-why of existing hydraulic test pump is as shown in figure 1, existing hydraulic test pump control principle passes through post
The reciprocating motion of plug makes water intaking valve 17 and outlet valve 16 replace keying, and the medium in water tank is changed into high extrusion from low pressure water inlet p1
Water p2；Container will be transported to by check valve 14 and enter by closing boosting rectifier control valve 12, closing container unloader 15, high pressure water outlet
Row boosting；By opening boosting rectifier control valve 12 or stop plunger motion, system stops boosting and enters pressurize, closes boosting rectifier control
Valve 12 boosts again, repeatedly can achieve boosting, pressurize by this operation；Open container unloader 15 feasible system release.
Existing stress test technical controlling precision can reach ± 0.5mpa, can meet most of not high to control accuracy
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 precise control；2nd, pressure reduction can not be achieved effective control it is impossible to complete blood pressure lowering
The pressure drop stage of pressurize again controls afterwards；3rd, during pressurize, because medium is unable to reverse flow, only there is unidirectional ftercompction, do not possess fall
Pressure makes system pressure maintain invariable function；4th, control accuracy is difficult to improve again.
Content of the invention
The goal of the invention of the present invention is: for above-mentioned problem, provides a kind of test medium can two-way flow
Control pressurer system and method, mainly solve the technical problem that prior art is not easily achieved precise control to rate of pressure rise；Also solve
Certainly prior art can not achieve effective control to pressure reduction it is impossible to the pressure drop stage control technology completing pressurize again after blood pressure lowering is asked
Topic；Also solve prior art in pressurize, because medium is unable to reverse flow, only there is unidirectional ftercompction, do not possess blood pressure lowering and make and be
The constant technical problem of system pressure remained constant；Also solve the technology that in prior art, pressure controling precision is difficult to improve again to ask
Topic.Replace inlet/outlet valve using the stop valve forcing opening and closing, control plunger mobile by pressure feedback thus realize medium can be just
To and reverse flow, reach rate of pressure rise and rate of pressure reduction can effective control；Pressure can be precisely controlled, control accuracy reaches
±0.02mpa；Automatic compensation or blood pressure lowering are with stability contorting pressure；Break through the technical merit of conventional pressure measuring technology.
The technical solution used in the present invention is as follows:
The test medium of the present invention can two-way flow control pressurer system, be connected between tested container and water tank to
A few control pressure line, described control pressure line includes plunger cavity, feed tube and drain pipe, and described plunger intracavity cooperation is provided with post
Plug, described plunger cavity is connected to tested container by drain pipe, and described drain pipe is provided with water outlet stop valve；Described plunger cavity leads to
Cross feed tube to connect to water tank, described feed tube is provided with into water stop valve；Unloader is located at tested container and water outlet stop valve
Between mistake liquid pipe on.
Due to said structure, in terms of existing technologies, the present invention replaces Inlet and outlet water using the stop valve forcing opening and closing
Valve, control plunger mobile by pressure feedback thus realize medium can forward and reverse flowing, and simultaneously can by stop valve with
The cooperation linkage of plunger reaches control pressure and the purpose of pressure drop stage；Make the present invention on the basis of possessing existing capability,
Enable the precise control of rate of pressure rise and rate of pressure reduction；Pressure can be precisely controlled, control accuracy reaches ± 0.02mpa；
Automatic compensation or blood pressure lowering system can be made to maintain invariable pressure in pressurize；Pressure reduction effectively can be controlled,
Complete the pressure drop stage function of pressurize again after blood pressure lowering.Therefore present invention mainly solves the rate of pressure rise of prior art is not easily achieved
The technical problem of precise control；Also solve prior art pressure reduction can not be achieved effective control it is impossible to complete after blood pressure lowering again
The pressure drop stage control technology problem of pressurize；Also solve prior art in pressurize, because medium is unable to reverse flow, only have
Unidirectional ftercompction, not possessing blood pressure lowering makes system pressure maintain invariable technical problem；Also solve Stress control in prior art
Precision is difficult to the technical problem improving again.
The test medium of the present invention can two-way flow control pressurer system, described plunger cavity is connected with plunger cavity pressure
Sensor, described drain pipe is provided with container pressure sensor, and described plunger is provided with plunger position detection means；Described plunger
Cavity pressure sensor, container pressure sensor and plunger position detection means connect and transmit signal to controller, described control
Device processed connects and controls to be had into water stop valve, water outlet stop valve and plunger.
Due to said structure, the plunger position detection means in the present invention, unloader, plunger cavity pressure transducer are optional
Element, plunger position detection means is used for automatic decision plunger position；Unloader can direct discharge system pressure；Plunger cavity pressure
Force transducer is used for judging plunger cavity pressure, when plunger is pressed into, can be then turned on when plunger cavity pressure is equal with operating pressure
Water outlet stop valve, to ensure boosting steadily and to improve the water outlet stop valve life-span.And by electronic component to whole Stress control system
Pressure monitor in system, is greatly improved control accuracy, by controller come the increasing of the whole control pressurer system of Automated condtrol
The control (namely water inlet stop valve, water outlet stop valve and plunger open and close are automatically controlled) of pressure, pressurize and blood pressure lowering, behaviour
Make extremely easy, easy to use, suitable popularization and application.
The test medium of the present invention can two-way flow control pressurer system, be connected between tested container and water tank to
A few control pressure line, described control pressure line includes plunger cavity and crosses liquid pipe, and tested container is connected by described liquid pipe of crossing with water tank,
Described cross liquid pipe be provided with water outlet stop valve with water inlet stop valve, described cross liquid pipe upper water-out stop valve and water inlet stop valve between
Position be connected with plunger cavity, the cooperation of described plunger intracavity is provided with plunger；Described plunger cavity is connected to tested appearance by drain pipe
Device, described drain pipe connects to tested container, is provided with outlet valve at the drain pipe of wherein said plunger cavity；And/or described plunger
Chamber is connected to water tank by feed tube, is provided with water intaking valve at the feed tube of described plunger cavity;Unloader located at tested container with go out
In mistake liquid pipe between water stop valve.
Due to said structure, the design of the present invention can be applied to the structure to existing hydraulic test pump and improve, thus reducing
Production cost；The structure that existing hydraulic test pump specifically can be retained is: described plunger cavity is connected to tested container by drain pipe, described
Drain pipe connects to tested container, is provided with outlet valve at the drain pipe of wherein said plunger cavity.Or described plunger cavity pass through into
Liquid pipe connects to water tank, is provided with water intaking valve at the feed tube of described plunger cavity.Or described plunger cavity by drain pipe connect to
Tested container, described drain pipe connects to tested container, is provided with outlet valve at the drain pipe of wherein said plunger cavity, described plunger
Chamber is connected to water tank by feed tube, is provided with water intaking valve at the feed tube of described plunger cavity.Therefore can be many to existing hydraulic test pump
Plant structure to be transformed and improve, it is possible to resolve the container of prior art, in pressure maintaining period, (is such as heated, becomes by external action
Shape etc.) pressure rise, system do not possess and reduces pressure and carry out the technical problem of constant voltage；Also solve prior art some needs are carried out
The stress test of segmentation step pressure reducing cannot meet the technical problem of required precision；Also solve pressure controling precision in prior art
It is difficult to the technical problem improving again；Inlet/outlet valve can be replaced using the stop valve forcing opening and closing by the design of the present invention, pass through
Pressure feedback control plunger is mobile can forward and reverse to flow thus realizing medium, reaches control pressure and the control of pressure drop stage
System；On the basis of possessing existing capability, pressure can be precisely controlled, control accuracy reaches ± 0.02mpa；Automatic compensation or
Blood pressure lowering is with stability contorting pressure；Accurate blood pressure lowering control function, breaks through the technical merit of conventional pressure measuring technology.
The test medium of the present invention can two-way flow control pressurer system, be parallel between described tested container and water tank
Article two, independent control pressure line more than, the plunger in wherein said control pressure line can cooperate alternating movement.
Due to said structure, more than two independent control pressure lines mutually and are connected between tested container and water tank, and
Plunger therein cooperates alternating movement, so that just formed between plunger effectively coordinating, when wherein plunger is front
During dead point, remaining plunger reaches remaining position, and a plurality of control pressure line can be made simultaneously continuously to be boosted and buck functionality, thus
Greatly increase the efficiency of boosting and blood pressure lowering.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process；
Wherein boosting rectifier control process is: closes water outlet stop valve and unloader, opens water inlet stop valve；Plunger is controlled to move
During returning rear dead point again to after front dead point, medium will be drawn into plunger cavity by stop valve of intaking from water tank；Close
Water inlet stop valve, opens water outlet stop valve, controls plunger advancement, and medium is pressed into tested container, makes in tested container by plunger
Pressure rise；If plunger advancement moves to front dead point when not yet reaching goal pressure, water outlet stop valve can be closed, open water inlet and cut
Only valve, plunger retreats again to rear dead point, completes to suck medium action；Operation is repeated, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, closes
Close water outlet stop valve, control pressurer system enters packing state；When tested container need to make constant voltage pressurize, control pressurer system
After reaching goal pressure, do not close water outlet stop valve, now water inlet stop valve is closed, and plunger is by controller according to pressure
Force feedback is moved forward and backward, and controls the forward and reverse flowing of medium to reach constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader, allow medium to pass through to bypass off-load, or directly open water outlet stop valve, water inlet stop valve simultaneously, allow medium
Return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet cut-off
Valve；Control plunger retrogressing, operating pressure and plunger cavity pressure equal and slowly decline, plunger fortune during decline, can be terminated at any time
Move and carry out pressurize again in pressure reduction；Dead point after plunger falls back on, when operating pressure does not also drop to normal pressure, can close water outlet cut-off
Valve, opens water inlet stop valve, now plunger cavity pressure is equal with the intake pressure of normal pressure；Control plunger to move to front dead point, close
Close into water stop valve, open water outlet stop valve, make operating pressure and plunger cavity pressure equal again；Repeatable operation reaches blood pressure lowering control
Purpose processed.
Due to said method, can to boosting in running for the whole control pressurer system, pressurize, especially for
Pressure drop stage controls, and breaching conventional art cannot be to a blood pressure lowering control technology difficult problem, thus solve prior art needing to some
The stress test carrying out segmentation step pressure reducing cannot meet the technical problem of required precision；Cut-off additionally by enforced opening
Valve replaces inlet/outlet valve, controls plunger mobile by pressure feedback and can forward and reverse flow thus realizing medium, reaches control
Pressure and the control of pressure drop stage；On the basis of possessing existing capability, pressure can be precisely controlled, control accuracy reaches ±
0.02mpa；Automatic compensation or blood pressure lowering are with stability contorting pressure；Accurate blood pressure lowering control function, breaks through conventional pressure measuring technology
Technical merit.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process, the drain pipe in described control pressurer system connects to tested container, wherein institute
State and at the drain pipe of plunger cavity, be provided with outlet valve；
Wherein boosting rectifier control process is: closes water outlet stop valve and unloader, opens water inlet stop valve, controls plunger to move
During returning rear dead point again to after front dead point, medium will be drawn into plunger cavity by stop valve of intaking from water tank；Close
Water inlet stop valve, when controlling plunger advancement, outlet valve automatically turns under differential pressure action, and medium is pressed into tested container by plunger,
Make the pressure rise in tested container；If plunger advancement moves to front dead point when not yet reaching goal pressure, water inlet can be opened and cut
Only valve, plunger retreats again to rear dead point, completes to suck medium action；Operation is repeated, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is,
Enter packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet cut-off
Valve, stop valve of now intaking is closed, and plunger is moved forward and backward according to pressure feedback by controller, controls medium
Forward and reverse flowing reaches constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader, allow medium to pass through to bypass off-load, or directly open water outlet stop valve, water inlet stop valve simultaneously, allow medium
Return water tank off-load；；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet cut-off
Valve；Control plunger retrogressing, operating pressure and plunger cavity pressure equal and slowly decline, plunger fortune during decline, can be terminated at any time
Move and carry out pressurize again in pressure reduction；Dead point after plunger falls back on, when operating pressure does not also drop to normal pressure, can close water outlet cut-off
Valve, opens water inlet stop valve, now plunger cavity pressure is equal with the intake pressure of normal pressure；Plunger cavity pressure is less than operating pressure,
Outlet valve is closed, and controls plunger to move to front dead point, closes water inlet stop valve, opens water outlet stop valve, make work
Pressure and plunger cavity pressure are equal again；Repeatable operation reaches blood pressure lowering and controls purpose.
Due to said method, the hydraulic test pump after improving can be accurately controlled, particularly boosting, pressurize and segmentation
Blood pressure lowering controls so that original hydraulic test pump, after improving, on the basis of keeping rapid pressure, equally can break through traditional skill
Art cannot be to a blood pressure lowering control technology difficult problem, and solving prior art needs the stress test carrying out segmentation step pressure reducing no to some
Method meets the technical problem of required precision；Stop valve additionally by enforced opening replaces inlet/outlet valve, thus realize medium can
Forward and reverse flows, and reaches control pressure and the control of pressure drop stage；On the basis of possessing existing capability, can be more accurately
Control pressure, control accuracy reaches ± 0.02mpa；Automatic compensation or blood pressure lowering are with stability contorting pressure；Accurate blood pressure lowering controls work(
Can, break through the technical merit of conventional pressure measuring technology.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process, the plunger cavity in described control pressurer system is connected to water tank by feed tube,
It is provided with water intaking valve at the feed tube of described plunger cavity；
Wherein boosting rectifier control process is: closes water outlet stop valve and unloader, opens water inlet stop valve, controls plunger to move
To after front dead point, close water inlet stop valve, during controlling plunger to return rear dead point, medium will be inhaled by water intaking valve from water tank
Enter in plunger cavity；When controlling plunger advancement, water intaking valve is automatically switched off under differential pressure action, opens water outlet stop valve, and plunger will
Medium is pressed into tested container by water outlet stop valve, makes the pressure rise in tested container；If plunger advancement moves to front dead point
When not yet reaching goal pressure, plunger retreats again to rear dead point, and water intaking valve automatically turns under differential pressure action, completes to suck Jie
Matter action；Operation is repeated, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is,
Enter packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet cut-off
Valve, stop valve of now intaking is closed, and is moved forward and backward according to pressure feedback by controller, controls medium positive and negative
Reach constant voltage to flowing to require；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader, allow medium to pass through to bypass off-load, or directly open water outlet stop valve, water inlet stop valve simultaneously, allow medium
Return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet cut-off
Valve, plunger cavity pressure is more than intake pressure, and water intaking valve is closed；Control plunger retrogressing, operating pressure and plunger cavity pressure
Power is equal and slowly declines, and can terminate plunger motion at any time and carry out pressurize again in pressure reduction during decline；When plunger falls back on
Dead point afterwards, when operating pressure does not also drop to normal pressure, can close water outlet stop valve, open water inlet stop valve, now plunger cavity pressure
Equal with the intake pressure of normal pressure；Control plunger to move to front dead point, close water inlet stop valve, open water outlet stop valve, make work
Make pressure and plunger cavity pressure is equal again；Repeatable operation reaches blood pressure lowering and controls purpose.
Due to said method, the hydraulic test pump after improving can be accurately controlled, particularly boosting, pressurize and segmentation
Blood pressure lowering control so that original hydraulic test pump through improvement after, on the basis of keep medium rapidly enters plunger cavity, equally permissible
Breaking through conventional art cannot be to a blood pressure lowering control technology difficult problem, and solving prior art needs to carry out segmentation step pressure reducing to some
Stress test cannot meet the technical problem of required precision；Stop valve additionally by enforced opening replaces inlet/outlet valve, thus
Realize medium can forward and reverse flow, reach control pressure and the control of pressure drop stage；On the basis of possessing existing capability,
Pressure can be precisely controlled, control accuracy reaches ± 0.02mpa；Automatic compensation or blood pressure lowering are with stability contorting pressure；Accurately
Blood pressure lowering control function, breaks through the technical merit of conventional pressure measuring technology.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process, the drain pipe in described control pressurer system connects to tested container, wherein institute
State and at the drain pipe of plunger cavity, be provided with outlet valve；Described plunger cavity is connected to water tank by feed tube, the feed liquor of described plunger cavity
It is provided with water intaking valve at pipe；
Wherein boosting rectifier control process is: closes water outlet stop valve, unloader and water inlet stop valve；Before controlling plunger to move to
During returning rear dead point again behind dead point, water intaking valve automatically turns under differential pressure action, and medium will pass through water intaking valve from water tank
It is drawn in plunger cavity；Control plunger advancement, outlet valve automatically turns under differential pressure action, and medium is pressed into tested appearance by plunger
Device, makes the pressure rise in tested container；If plunger advancement moves to front dead point when not yet reaching goal pressure, plunger again after
Retreat to rear dead point, complete to suck medium action；Operation is repeated, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is,
Enter packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet cut-off
Valve, stop valve of now intaking is closed, and plunger is moved forward and backward according to pressure feedback by controller, controls medium
Forward and reverse flowing reaches constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader, allow medium to pass through to bypass off-load, or directly open water outlet stop valve, water inlet stop valve simultaneously, allow medium
Return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet cut-off
Valve, plunger cavity pressure is more than intake pressure, and water intaking valve is closed；Control plunger retrogressing, operating pressure and plunger cavity pressure
Power is equal and slowly declines, and can terminate plunger motion at any time and carry out pressurize again in pressure reduction during decline；When plunger falls back on
Dead point afterwards, when operating pressure does not also drop to normal pressure, can close water outlet stop valve, open water inlet stop valve, now plunger cavity pressure
Equal with the intake pressure of normal pressure；Plunger cavity pressure is less than operating pressure, and outlet valve is closed, and controls plunger to move to
Front dead point, closes water inlet stop valve, opens water outlet stop valve, make operating pressure and plunger cavity pressure equal again；Repeatable operation
Reach blood pressure lowering and control purpose.
Due to said method, the hydraulic test pump after improving can be accurately controlled, particularly boosting, pressurize and segmentation
Blood pressure lowering controls so that original hydraulic test pump, after improving, remains entire infrastructure and the function of existing hydraulic test pump, that is, in system
During boosting, close water outlet stop valve and water inlet stop valve, you can while realizing quick boost function, equally can break through biography
System technology cannot be to a blood pressure lowering control technology difficult problem, and the pressure that solving prior art needs to carry out segmentation step pressure reducing to some is surveyed
Examination cannot meet the technical problem of required precision；Stop valve additionally by enforced opening replaces inlet/outlet valve, anti-by pressure
Feedback control plunger is mobile can forward and reverse to flow thus realizing medium, reaches control pressure and the control of pressure drop stage；In tool
On the basis of standby existing capability, pressure can be precisely controlled, control accuracy reaches ± 0.02mpa；Automatic compensation or blood pressure lowering with
Stability contorting pressure；Accurate blood pressure lowering control function, breaks through the technical merit of conventional pressure measuring technology.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process, are parallel with two between the tested container in described control pressurer system and water tank
Independent control pressure line a and control pressure line b, the plunger in wherein two control pressure lines simultaneously can carry out alternating movement simultaneously；
Wherein boosting rectifier control process is: closes water outlet stop valve and unloader, opens water inlet stop valve；In control pressure line a
During controlling plunger to return rear dead point again after moving to front dead point, medium will be drawn into post from water tank by stop valve of intaking
During plug chamber, in control pressure line b, plunger moves again to front dead point after returning rear dead point；Close water inlet stop valve in control pressure line a, open
Open water outlet stop valve, dead point is moved forward from rear dead point to control plunger, and medium is pressed into tested container, makes in tested container by plunger
Pressure rise when, the plunger in control pressure line b returns rear dead point after moving to front dead point again, medium will from water tank pass through water inlet
Stop valve is drawn into plunger cavity；If the plunger advancement in control pressure line a moves to front dead point when not yet reaching goal pressure, can close
Close water outlet stop valve in control pressure line a, open control pressure line a water inlet stop valve, in control pressure line b, open water outlet cut-off simultaneously
Valve, dead point is moved forward from rear dead point to control plunger, and medium is pressed into tested container by plunger；In control pressure line a, plunger is more simultaneously
Secondary retreat to rear dead point, complete suck medium action；Operation is repeated, control pressure line a and control pressure line b replaces supercharging, rises
Press through journey can achieve continuously uninterruptedly boost, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, closes
Close water outlet stop valve, control pressurer system enters packing state；When tested container need to make constant voltage pressurize, control pressurer system
After reaching goal pressure, do not close water outlet stop valve, now water inlet stop valve is closed, control pressure line a and pressure control pipe
Plunger in line b can individually or simultaneously be moved forward and backward, and control the forward and reverse flowing of medium to reach constant voltage and require；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader, allow medium to pass through to bypass off-load, or directly open water outlet stop valve, water inlet stop valve simultaneously, allow medium
Return water tank off-load；When tested container need to be controlled to pressure reduction, in control pressure line a, open water outlet stop valve, control column
Plug retrogressing, operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate plunger motion at any time and be dropped during decline
Pressurize again during pressure, meanwhile, the water outlet stop valve in control pressure line b is closed, and water inlet stop valve is opened；
The dead point after plunger in control pressure line a falls back on, when operating pressure does not also drop to normal pressure, can close water outlet cut-off
Valve, opens water inlet stop valve, now plunger cavity pressure is equal with the intake pressure of normal pressure, meanwhile, opens in control pressure line b
Water outlet stop valve, plunger retrogressing, operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate post during decline at any time
Plug motion carries out pressurize again in pressure reduction；
The dead point after plunger in control pressure line b falls back on, post when operating pressure does not also drop to normal pressure, in control pressure line a
Plug moves to front dead point, closes water inlet stop valve, opens water outlet stop valve, make operating pressure and plunger cavity pressure equal again；
Repeatable operation, control pressure line a and control pressure line b alternating movement, pressure reduction can achieve continuously uninterrupted blood pressure lowering, reaches blood pressure lowering control
Purpose processed.
Due to said method, the alternating movement of two plungers, two plunger motion direction contrast, i.e. left side post can be passed through
, when front dead point, the right plunger is at rear dead point it is ensured that continuous boosting, buck functionality for plug；Liter in two of which control pressure line
Pressure, buck functionality are carried out simultaneously, are greatly improved the efficiency of boosting and blood pressure lowering, reduce the operating time, save human cost.Simultaneously
Breaking through conventional art cannot be to a blood pressure lowering control technology difficult problem, and solving prior art needs to carry out segmentation step pressure reducing to some
Stress test cannot meet the technical problem of required precision；Stop valve additionally by enforced opening replaces inlet/outlet valve, passes through
Pressure feedback control plunger is mobile can forward and reverse to flow thus realizing medium, reaches control pressure and the control of pressure drop stage
System；On the basis of possessing existing capability, pressure can be precisely controlled, control accuracy reaches ± 0.02mpa；Automatic compensation or
Blood pressure lowering is with stability contorting pressure；Accurate blood pressure lowering control function, breaks through the technical merit of conventional pressure measuring technology.
In sum, due to employing technique scheme, the invention has the beneficial effects as follows:
1st, the test medium of the present invention can the control pressurer system of two-way flow and method, mainly solve the appearance of prior art
In pressure maintaining period, by external action (such as heat, deform) pressure rise, system does not possess reduction pressure and carrys out constant voltage device
Technical problem；Also solving prior art needs the stress test carrying out segmentation step pressure reducing cannot meet required precision some
Technical problem；Also solve pressure controling precision in prior art and be difficult to the technical problem improving again；
2nd, the test medium of the present invention can the control pressurer system of two-way flow and method, using the stop valve forcing opening and closing
Replace inlet/outlet valve, control plunger mobile by pressure feedback and can forward and reverse flow thus realizing medium, reach control pressure
Power and the control of pressure drop stage；On the basis of possessing existing capability, pressure can be precisely controlled, control accuracy reaches ±
0.02mpa；Automatic compensation or blood pressure lowering are with stability contorting pressure；Accurate blood pressure lowering control function, breaks through conventional pressure measuring technology
Technical merit.
Brief description
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the pressure testing pump control system schematic diagram of prior art；
Fig. 2 is the structural representation of embodiment 1 in the present invention；
Fig. 3 is the structural representation of embodiment 2 in the present invention；
Fig. 4 is the structural representation of embodiment 3 in the present invention；
Fig. 5 is the structural representation of embodiment 4 in the present invention；
Fig. 6 is the structural representation of embodiment 5 in the present invention.
In figure labelling: 11- stage columnar plug, 12- boosting rectifier control valve, 13- pressure transmitter, 14- check valve, 15- container unloads
Lotus valve, 16- outlet valve, 17- water intaking valve, 18- water tank；21- plunger position detection means, 22- plunger, 23- water outlet stop valve,
24- container pressure sensor, 25- unloader, 26- plunger cavity pressure transducer, 27- water inlet stop valve, 28- water tank, 29- is intake
Valve, 30- outlet valve, 31- check valve, p1- low pressure is intake, p2- plunger cavity pressure, p3- operating pressure.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary), unless specifically stated otherwise,
Replaced by other alternative features equivalent or that there is similar purpose.I.e., unless specifically stated otherwise, each feature is a series of
One of equivalent or similar characteristics example.
Embodiment 1
As shown in Fig. 2 the test medium of the present invention can two-way flow control pressurer system, in tested container and water tank 28
Between be connected with least one control pressure line, described control pressure line includes plunger cavity, feed tube and drain pipe, described plunger intracavity
Cooperation is provided with plunger 22, and described plunger cavity is connected to tested container by drain pipe, and described drain pipe is provided with water outlet stop valve
23；Described plunger cavity is connected to water tank 28 by feed tube, and described feed tube is provided with into water stop valve 27；Unloader 25 located at
In mistake liquid pipe between tested container and water outlet stop valve 23.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process；
Wherein boosting rectifier control process is: closes water outlet stop valve 23 and unloader 25, opens water inlet stop valve 27；Control column
Plug 22 returns rear dead point after moving to front dead point again, and medium will pass through water inlet stop valve 27 from water tank 28 and be drawn into plunger cavity；
Close water inlet stop valve 27, open water outlet stop valve 23, control plunger 22 to advance, medium is pressed into tested container by plunger 22, makes
Pressure rise in tested container；If plunger 22 forward travel to front dead point not yet reach goal pressure when, water outlet can be closed and cut
Only valve 23, opens water inlet stop valve 27, and plunger 22 retreats again to rear dead point, completes to suck medium action；Operation is repeated,
Until reaching goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, closes
Close water outlet stop valve 23, control pressurer system enters packing state；When tested container need to make constant voltage pressurize, Stress control system
After system reaches goal pressure, do not close water outlet stop valve 23, now water inlet stop valve 27 is closed, and plunger 22 is by controlling
Device is moved forward and backward according to pressure feedback, controls the forward and reverse flowing of medium to reach constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader 25, allow medium to pass through to bypass off-load, or directly open water outlet stop valve 23, water inlet stop valve 27 simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet
Stop valve 23；Plunger 22 is controlled 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 pressurize again in pressure reduction；Dead point after plunger 22 falls back on, when operating pressure does not also drop to normal pressure, can close
Close water outlet stop valve 23, open water inlet stop valve 27, now plunger cavity pressure is equal with the intake pressure of normal pressure；Control plunger 22
Move to front dead point, close water inlet stop valve 27, open water outlet stop valve 23, make operating pressure and plunger cavity pressure phase again
Deng；Repeatable operation reaches blood pressure lowering and controls purpose.
Embodiment 2
As shown in Fig. 2 embodiment 2 is similar to Example 1, on the basis of embodiment 1, by the pressure monitor in whole system
Sensing detection is carried out using sensor, to control when sensor detects corresponding pressure value and by corresponding signal transmission
Device, controller, according to default program, is controlled to stop valve therein and plunger, realizes the whole automatization controlling behaviour
Make, specially described plunger cavity is connected with plunger cavity pressure transducer 26, described drain pipe is provided with container pressure sensor
24, described plunger 22 is provided with plunger position detection means 21；Described plunger cavity pressure transducer 26, container pressure sensor 24
And plunger position detection means 21 connects and transmits signal to controller, described controller connects and controls to be had into water stop valve
27th, water outlet stop valve 23 and plunger 22.Plunger position detecting device in system, unloader, plunger cavity pressure transducer are can
Select element, plunger position detection means is used for automatic decision plunger position；Unloader can direct discharge system pressure；Plunger cavity
Pressure transducer is used for judging plunger cavity pressure, when plunger is pressed into, when plunger cavity pressure is equal with operating pressure, then can open
Open water outlet stop valve, to ensure boosting steadily and to improve the water outlet stop valve life-span.Therefore the present invention can pass through each sensor pair
The detection of pressure, and after controller then accepts each pressure value, carry out corresponding stop valve open and close action according to pre-set programs,
Control the movement of plunger, thus realizing the operation automation of the present invention simultaneously.
Embodiment 3
As shown in figure 3, the test medium of the present invention can two-way flow control pressurer system, in tested container and water tank 28
Between be connected with least one control pressure line, described control pressure line includes plunger cavity and crosses liquid pipe, and described liquid pipe of crossing is by tested appearance
Device is connected with water tank 28, and described liquid pipe of crossing is provided with water outlet stop valve 23 and water inlet stop valve 27, and described liquid pipe upper water-out of crossing cuts
Only the position between valve 23 and water inlet stop valve 27 is connected with plunger cavity, and described plunger intracavity cooperation is provided with plunger 22；Described post
Plug chamber is connected to tested container by drain pipe, is provided with outlet valve 30 at the drain pipe of wherein said plunger cavity；Described plunger cavity
Connected to water tank 28 by feed tube, at the feed tube of described plunger cavity, be provided with water intaking valve 29；Unloader 25 is located at tested container
In mistake liquid pipe and water outlet stop valve 23 between.
It can be seen that present invention preserves entire infrastructure and the function of existing pump, that is, when system is boosted, close water outlet stop valve
With water inlet stop valve, you can realize quick boost function, to constant voltage and buck functionality.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process；
Wherein boosting rectifier control process is: closes water outlet stop valve 23 and unloader 25, opens water inlet stop valve 27；Control column
After plug 22 moves to front dead point, close water inlet stop valve 27, during controlling plunger 22 to return rear dead point, water intaking valve 29 is in pressure
Automatically turn under difference effect, medium will be drawn into plunger cavity by water intaking valve 29 from water tank 28；Plunger 22 is controlled to advance, water outlet
Valve 30 automatically turns under differential pressure action, and medium is passed through to be pressed into tested container by plunger 22, makes the pressure rise in tested container；
If plunger 22 forward travel to front dead point not yet reach goal pressure when, plunger 22 retreats again to rear dead point, complete suck be situated between
Matter action；Operation is repeated, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is,
Enter packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet cut-off
Valve 23, stop valve 27 of now intaking is closed, and plunger 22 is moved forward and backward according to pressure feedback by controller, controls
The forward and reverse flowing of medium reaches constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader 25, allow medium to pass through to bypass off-load, or directly open water outlet stop valve 23, water inlet stop valve 27 simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet
Stop valve 23, plunger cavity pressure is more than intake pressure, and water intaking valve 29 is closed；Plunger 22 is controlled to retreat, operating pressure
Equal with plunger cavity pressure and slowly decline, plunger motion can be terminated during decline at any time and carry out pressurize again in pressure reduction；
Dead point after plunger 22 falls back on, when operating pressure does not also drop to normal pressure, can close water outlet stop valve 23, open water inlet stop valve
27, now plunger cavity pressure is equal with the intake pressure of normal pressure；Plunger cavity pressure is less than operating pressure, and outlet valve 30 is in closing
State, controls plunger 22 to move to front dead point, closes water inlet stop valve 27, opens water outlet stop valve 23, make operating pressure and post
Plug cavity pressure is equal again；Repeatable operation reaches blood pressure lowering and controls purpose.
Embodiment 4
As shown in figure 4, the test medium of the present invention can two-way flow control pressurer system, in tested container and water tank 28
Between be connected with least one control pressure line, described control pressure line includes plunger cavity and crosses liquid pipe, and described liquid pipe of crossing is by tested appearance
Device is connected with water tank 28, and described liquid pipe of crossing is provided with water outlet stop valve 23 and water inlet stop valve 27, and described liquid pipe upper water-out of crossing cuts
Only the position between valve 23 and water inlet stop valve 27 is connected with plunger cavity, and described plunger intracavity cooperation is provided with plunger 22；Described post
Plug chamber is connected to water tank 28 by feed tube, is provided with water intaking valve 29 at the feed tube of described plunger cavity；Unloader 25 is located at tested
In mistake liquid pipe between container and water outlet stop valve 23.
It can be seen that the present invention remains with the feed liquor function of former hydraulic test pump, medium can be fed to plunger intracavity in express delivery ground.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process, the plunger cavity in described control pressurer system is connected to water tank by feed tube
28, it is provided with water intaking valve 29 at the feed tube of described plunger cavity；
Wherein boosting rectifier control process is: closes water outlet stop valve 23 and unloader 25, controls plunger 22 to move to front dead point
Return rear dead point afterwards again, medium will be drawn into plunger cavity by water intaking valve 29 from water tank 28；When controlling plunger 22 to advance, water inlet
Valve 29 is automatically switched off under differential pressure action, opens water outlet stop valve 23, and medium is pressed into quilt by water outlet stop valve 23 by plunger 22
Examination container, makes the pressure rise in tested container；If plunger 22 forward travel to front dead point not yet reach goal pressure when, plunger
22 retreat again to rear dead point, and water intaking valve 29 automatically turns under differential pressure action, complete to suck medium action；Behaviour is repeated
Make, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is,
Enter packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet cut-off
Valve 23, stop valve 27 of now intaking is closed, and plunger 22 is moved forward and backward according to pressure feedback by controller, controls
The forward and reverse flowing of medium reaches constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader 25, allow medium to pass through to bypass off-load, or directly open water outlet stop valve 23, water inlet stop valve 27 simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet
Stop valve 23, plunger cavity pressure is more than intake pressure, and water intaking valve 29 is closed；Plunger 22 is controlled to retreat, operating pressure
Equal with plunger cavity pressure and slowly decline, plunger 22 motion can be terminated during decline at any time and carry out protecting again in pressure reduction
Pressure；Dead point after plunger 22 falls back on, when operating pressure does not also drop to normal pressure, can close water outlet stop valve 23, open water inlet cut-off
Valve 27, now plunger cavity pressure is equal with the intake pressure of normal pressure；Control plunger 22 to move to front dead point, close water inlet stop valve
27, open water outlet stop valve 23, make operating pressure and plunger cavity pressure equal again；Repeatable operation reaches blood pressure lowering and controls purpose.
Embodiment 5
As shown in figure 5, the test medium of the present invention can two-way flow control pressurer system, in tested container and water tank 28
Between be connected with least one control pressure line, described control pressure line includes plunger cavity and crosses liquid pipe, and described liquid pipe of crossing is by tested appearance
Device is connected with water tank 28, and described liquid pipe of crossing is provided with water outlet stop valve 23 and water inlet stop valve 27, and described liquid pipe upper water-out of crossing cuts
Only the position between valve 23 and water inlet stop valve 27 is connected with plunger cavity, and described plunger intracavity cooperation is provided with plunger 22；Described post
Plug chamber is connected to tested container by drain pipe, and described drain pipe connects to tested container, the drain pipe of wherein said plunger cavity
Place is provided with outlet valve 30；In mistake liquid pipe between tested container and water outlet stop valve 23 for the unloader 25.It can be seen that the present invention protects
Stay the pressurized construction of existing hydraulic test pump, can rapidly boost.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process, the drain pipe in described control pressurer system connects to tested container, wherein institute
State and at the drain pipe of plunger cavity, be provided with outlet valve 30；
Wherein boosting rectifier control process is: closes water outlet stop valve 23 and unloader 25, opens water inlet stop valve 27, control column
Plug 22 returns rear dead point after moving to front dead point again, and medium will pass through water inlet stop valve 27 from water tank 28 and be drawn into plunger cavity；
Close water inlet stop valve 27, when controlling plunger 22 to advance, outlet valve 30 automatically turns under differential pressure action, and plunger 22 is by medium pressure
Enter tested container, make the pressure rise in tested container；If plunger 22 forward travel to front dead point not yet reach goal pressure when,
Water inlet stop valve 27 can be opened, plunger 22 retreats again to rear dead point, complete to suck medium action；Operation is repeated, until
Reach goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is,
Enter packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet cut-off
Valve 23, stop valve 27 of now intaking is closed, and plunger 22 is moved forward and backward according to pressure feedback by controller, controls
The forward and reverse flowing of medium reaches constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader 25, allow medium to pass through to bypass off-load, or directly open water outlet stop valve 23, water inlet stop valve 27 simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet
Stop valve 23；Plunger 22 is controlled to retreat, operating pressure and plunger cavity pressure are equal and slowly decline, can at any time eventually during decline
Only plunger 22 motion carries out pressurize again in pressure reduction；Dead point after plunger 22 falls back on, when operating pressure does not also drop to normal pressure, can
Close water outlet stop valve 23, open water inlet stop valve 27, now plunger cavity pressure is equal with the intake pressure of normal pressure；Plunger cavity pressure
Power is less than operating pressure, and outlet valve 30 is closed, and controls plunger 22 to move to front dead point, closes water inlet stop valve 27,
Open water outlet stop valve 23, make operating pressure and plunger cavity pressure equal again；Repeatable operation reaches blood pressure lowering and controls purpose.
Embodiment 6
Embodiment 6 and embodiment 3,4 and 5 are similar, on the basis of embodiment 3,4 and 5, by the pressure monitor in whole system
Sensing detection is carried out using sensor, to control when sensor detects corresponding pressure value and by corresponding signal transmission
Device, controller, according to default program, is controlled to stop valve therein and plunger, realizes the whole automatization controlling behaviour
Make, specially on the position between the described water outlet stop valve 23 crossing liquid pipe and water inlet stop valve 27, be provided with plunger cavity pressure and pass
Sensor 26, described liquid pipe of crossing is provided with container pressure sensor 24, and described plunger 22 is provided with plunger position detection means 21；Institute
State plunger cavity pressure transducer 26, container pressure sensor 24 and plunger position detection means 21 to connect and transmit signal to control
Device processed, described controller connects and controls to be had into water stop valve 27, water outlet stop valve 23 and plunger 22.Plunger position in system
Detection means, unloader, plunger cavity pressure transducer are optional element, and plunger position detection means is used for automatic decision plunger position
Put；Unloader can direct discharge system pressure；Plunger cavity pressure transducer is used for judging plunger cavity pressure, in plunger press-in
When, water outlet stop valve can be then turned on when plunger cavity pressure is equal with operating pressure, be cut with ensureing that boosting is steady and improves water outlet
The only valve life-span.Therefore the present invention can pass through the detection to pressure for each sensor, and after controller then accepts each pressure value, according to
Pre-set programs carry out corresponding stop valve open and close action, control the movement of plunger, thus realizing the operation of the present invention simultaneously
Automatization.
Embodiment 7
As shown in fig. 6, being parallel with two independent control pressure lines between tested container in this embodiment and water tank 28, its
In specific control pressure line identical with the control pressure line in embodiment 1 and 2, namely described control pressure line includes plunger cavity, feed liquor
Pipe and drain pipe, described plunger intracavity cooperation is provided with plunger 22, and described plunger cavity is connected to tested container by drain pipe, described
Drain pipe is provided with water outlet stop valve 23；Described plunger cavity is connected to water tank 28 by feed tube, described feed tube be provided with into
Water stop valve 27；In mistake liquid pipe between tested container and water outlet stop valve 23 for the unloader 25.
Plunger 22 in wherein said control pressure line can cooperate alternating movement.According to this embodiment can by three and its
Above independent control pressure line cooperates setting, and cooperate to plunger 22 therein alternating movement simultaneously, can pass through simultaneously
Controller cooperation is controlled to each stop valve, thus completing the automation mechanized operation of cooperation it can be ensured that continuous boost, drop
Pressure function.
The test medium of the present invention can two-way flow control pressurer system control method, including boosting rectifier control process,
Holding pressure control process and blood pressure lowering control process, are parallel with two between the tested container in described control pressurer system and water tank 28
The control pressure line a of bar independence and control pressure line b, the plunger 22 in wherein two control pressure lines can carry out alternating movement simultaneously；
Wherein boosting rectifier control process is: closes the water outlet stop valve (23) in control pressure line a and control pressure line b and unloader
(25), in mistake liquid pipe between tested container and water outlet stop valve (23) for the unloader (25), control pressure line a and pressure control are opened
Water inlet stop valve (27) in line b；Plunger 22 is controlled to return rear dead point, medium again after moving to front dead point in control pressure line a
Will be when water tank 28 be drawn into plunger cavity by stop valve 27 of intaking, in control pressure line b, plunger 22 moves after returning rear dead point again
To front dead point；Close water inlet stop valve 27 in control pressure line a, open water outlet stop valve 23, control plunger 22 from rear dead point forward
Dead point is moved, and medium is pressed into tested container by plunger 22, plunger when making the pressure rise in tested container, in control pressure line b
22 move to front dead point after return rear dead point again, medium will from water tank 28 pass through intake stop valve 27 be drawn into plunger cavity；If control
Plunger 22 forward travel in pressure pipeline a to front dead point not yet reach goal pressure when, water outlet cut-off can be closed in control pressure line a
Valve 23, opens control pressure line a water inlet stop valve 27, opens water outlet stop valve 23 simultaneously in control pressure line b, control plunger 22 from rear
Dead point is moved forward at dead point, and medium is pressed into tested container by plunger 22；In control pressure line a, plunger 22 retreats again to rear dead simultaneously
Point, completes to suck medium action；Operation is repeated, control pressure line a and control pressure line b replaces supercharging, boost process can achieve
Continuously uninterruptedly boost, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, closes
Close the water outlet stop valve 23 in control pressure line a and control pressure line b, control pressurer system enters packing state；When tested container
When need to make constant voltage pressurize, after control pressurer system reaches goal pressure, do not close water outlet stop valve, now water inlet stop valve is in
Closed mode, the plunger in control pressure line a and control pressure line b can individually or simultaneously be moved forward and backward, and controls medium forward and reverse
Flowing reaches constant voltage and requires；Can be when tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, control
Water outlet stop valve 23 in pressure pipeline a is not closed, and water inlet stop valve 27 is closed, the water outlet cut-off in control pressure line b
Valve 23 cuts out, and the plunger 22 in control pressure line a can individually or simultaneously be moved forward and backward, and controls the forward and reverse flowing of medium to reach
Constant voltage requires, or the water outlet stop valve 23 in control pressure line b is not closed, and water inlet stop valve 27 is closed, control pressure line b
In water outlet stop valve 23 close, the plunger 22 in control pressure line b can individually or simultaneously be moved forward and backward, control medium just,
Reverse flow reaches constant voltage and requires, or the water outlet stop valve 23 in control pressure line a and control pressure line b is not closed, stop valve of intaking
27 are closed, and the water outlet stop valve 23 in control pressure line a and control pressure line b is closed, control pressure line a and control pressure line b
In plunger 22 can individually or simultaneously be moved forward and backward, control the forward and reverse flowing of medium reach constant voltage require；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, can
Directly open unloader 25, allow medium to pass through to bypass off-load, or directly open control pressure line a or control pressure line b or pressure control simultaneously
Water outlet stop valve 23 in pipeline a and control pressure line b, water inlet stop valve 27, allow medium return water tank off-load；When tested container needs
Pressure reduction is controlled, in control pressure line a, opens water outlet stop valve 23, control plunger 22 to retreat, operating pressure and plunger
Cavity pressure is equal and slowly declines, and can terminate plunger motion at any time and carry out pressurize again in pressure reduction during decline, same with this
When, the water outlet stop valve 23 in control pressure line b is closed, and water inlet stop valve 27 is opened；
The dead point after plunger 22 in control pressure line a falls back on, when operating pressure does not also drop to normal pressure, can close water outlet cut-off
Valve 23, opens water inlet stop valve 27, now plunger cavity pressure is equal with the intake pressure of normal pressure, meanwhile, in control pressure line b
Open water outlet stop valve 23, plunger 22 retreats, operating pressure and plunger cavity pressure are equal and slowly decline, can be with during decline
When terminate plunger motion carry out pressurize again in pressure reduction；
The dead point after plunger 22 in control pressure line b falls back on, when operating pressure does not also drop to normal pressure, in control pressure line a
Plunger 22 moves to front dead point, closes water inlet stop valve 27, opens water outlet stop valve 23, make operating pressure and plunger cavity pressure again
Secondary equal；Repeatable operation, pressure reduction can achieve continuously uninterrupted blood pressure lowering, reaches blood pressure lowering and controls purpose.
According to the principle of embodiment 7, control pressure line therein can be adopted the structure of above-described embodiment 3,4,5 and 6, its control
Method processed can be obtained by embodiment 7.
To sum up shown, the present invention replaces inlet/outlet valve using the stop valve forcing opening and closing, controls plunger by pressure feedback
Mobile thus realize medium can forward and reverse flowing, and control pressure can be reached by the cooperation linkage of stop valve and plunger simultaneously
Power and the purpose of pressure drop stage；Make the present invention on the basis of possessing existing capability, pressure can be precisely controlled, control essence
Degree reaches ± 0.02mpa；Automatic compensation or blood pressure lowering are with stability contorting pressure；Accurate blood pressure lowering control function.Master therefore of the present invention
, in pressure maintaining period, by external action (such as heat, deform) pressure rise, system is or not the container of prior art to be solved
Possess and reduce the technical problem that pressure carrys out constant voltage；Also solving prior art needs to carry out the pressure of segmentation step pressure reducing to some
Test cannot meet the technical problem of required precision；Also solve hydraulic test pump control accuracy in prior art and be difficult to the skill improving again
Art problem.
The invention is not limited in aforesaid specific embodiment.The present invention expands to and any discloses in this manual
New feature or any new combination, and the arbitrary new method of disclosure or the step of process or any new combination.
Claims (10)
1. a kind of test medium can two-way flow control pressurer system it is characterised in that: tested container and water tank (28) it
Between be connected with least one control pressure line, described control pressure line includes plunger cavity, feed tube and drain pipe, and described plunger intracavity is joined
Conjunction is provided with plunger (22), and described plunger cavity is connected to tested container by drain pipe, and described drain pipe is provided with water outlet stop valve
(23)；Described plunger cavity is connected to water tank (28) by feed tube, and described feed tube is provided with into water stop valve (27).
2. test medium as claimed in claim 1 can two-way flow control pressurer system it is characterised in that: described plunger cavity
On be connected with plunger cavity pressure transducer (26), described drain pipe is provided with container pressure sensor (24), described plunger (22)
It is provided with plunger position detection means (21)；Described plunger cavity pressure transducer (26), container pressure sensor (24) and post
Plug position detecting device (21) connects and transmits signal to controller, and described controller connects and controls to be had into water stop valve
(27), water outlet stop valve (23) and plunger (22).
3. a kind of test medium can two-way flow control pressurer system it is characterised in that: tested container and water tank (28) it
Between be connected with least one control pressure line, described control pressure line includes plunger cavity and crosses liquid pipe, and described liquid pipe of crossing is by tested container
It is connected with water tank (28), described liquid pipe of crossing is provided with water outlet stop valve (23) and water inlet stop valve (27), and described mistake goes out in liquid pipe
Position between water stop valve (23) and water inlet stop valve (27) is connected with plunger cavity, and described plunger intracavity cooperation is provided with plunger
(22)；Described plunger cavity is connected to tested container by drain pipe, is provided with outlet valve at the drain pipe of wherein said plunger cavity
(30)；And/or described plunger cavity is connected to water tank (28) by feed tube, at the feed tube of described plunger cavity, it is provided with water intaking valve
(29).
4. test medium as claimed in claim 3 can two-way flow control pressurer system it is characterised in that: described cross liquid
Position between the water outlet stop valve (23) of pipe and water inlet stop valve (27) is provided with plunger cavity pressure transducer (26), described mistake
Liquid pipe is provided with container pressure sensor (24), and described plunger (22) is provided with plunger position detection means (21)；Described plunger
Cavity pressure sensor (26), container pressure sensor (24) and plunger position detection means (21) connect and transmit signal to control
Device processed, described controller connects and controls to be had into water stop valve (27), water outlet stop valve (23) and plunger (22).
5. the test medium as described in one of Claims 1-4 can two-way flow control pressurer system it is characterised in that: institute
State and between tested container and water tank (28), be parallel with more than two independent control pressure lines, the plunger in wherein said control pressure line
(22) can cooperate alternating movement.
6. the test medium described in a kind of employing claim 1 or 2 can two-way flow control pressurer system control method, its
It is characterised by: include boosting rectifier control process, holding pressure control process and blood pressure lowering control process；
Wherein boosting rectifier control process is: closes water outlet stop valve (23) and unloader (25), unloader (25) is located at tested container
In mistake liquid pipe and water outlet stop valve (23) between, open water inlet stop valve (27)；After controlling plunger (22) to move to front dead point
During returning rear dead point again, medium will pass through water inlet stop valve (27) from water tank (28) and be drawn into plunger cavity；Close into
Water stop valve (27), opens water outlet stop valve (23), controls plunger (22) to advance, medium is pressed into tested container by plunger (22),
Make the pressure rise in tested container；If plunger (22) forward travel to front dead point not yet reach goal pressure when, close water outlet
Stop valve (23), opens water inlet stop valve (27), and plunger (22) retreats again to rear dead point, completes to suck medium action；Repeatedly
Operated, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, closes out
Water stop valve (23), control pressurer system enters packing state；When tested container need to make constant voltage pressurize, control pressurer system
After reaching goal pressure, do not close water outlet stop valve (23), now water inlet stop valve (27) be closed, plunger (22) by
Controller is moved forward and backward according to pressure feedback, controls the forward and reverse flowing of medium to reach constant voltage and requires；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, directly opens
Open unloader (25), allow medium to pass through to bypass off-load, or directly open water outlet stop valve (23), water inlet stop valve (27) simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet
Stop valve (23)；Plunger (22) is controlled to retreat, operating pressure and plunger cavity pressure are equal and slowly decline, can be with during decline
When terminate plunger motion carry out pressurize again in pressure reduction；Dead point after plunger (22) falls back on, operating pressure does not also drop to normal pressure
When, close water outlet stop valve (23), open water inlet stop valve (27), now plunger cavity pressure is equal with the intake pressure of normal pressure；
Control plunger (22) to move to front dead point, close water inlet stop valve (27), open water outlet stop valve (23), make operating pressure and post
Plug cavity pressure is equal again；Repeatable operation reaches blood pressure lowering and controls purpose.
7. the test medium described in a kind of employing claim 3 or 4 can two-way flow control pressurer system control method, its
It is characterised by: it includes boosting rectifier control process, holding pressure control process and blood pressure lowering control process, in described control pressurer system
Drain pipe connects to tested container, is provided with outlet valve (30) at the drain pipe of wherein said plunger cavity；
Wherein boosting rectifier control process is: closes water outlet stop valve (23) and unloader (25), unloader (25) is located at tested container
In mistake liquid pipe and water outlet stop valve (23) between, open water inlet stop valve (27), after controlling plunger (22) to move to front dead point
During returning rear dead point again, medium will pass through water inlet stop valve (27) from water tank (28) and be drawn into plunger cavity；Close into
Water stop valve (27), when controlling plunger (22) to advance, outlet valve (30) automatically turns under differential pressure action, and plunger (22) is by medium
It is pressed into tested container, make the pressure rise in tested container；If plunger (22) forward travel is to front dead point still miss the mark pressure
During power, open water inlet stop valve (27), plunger (22) retreats again to rear dead point, complete to suck medium action；Behaviour is repeated
Make, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is, enters
Packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet stop valve
(23), now water inlet stop valve (27) is closed, and plunger (22) is moved forward and backward according to pressure feedback by controller,
Control the forward and reverse flowing of medium to reach constant voltage to require；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, directly opens
Open unloader (25), allow medium to pass through to bypass off-load, or directly open water outlet stop valve (23), water inlet stop valve (27) simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet
Stop valve (23)；Plunger (22) is controlled to retreat, operating pressure and plunger cavity pressure are equal and slowly decline, can be with during decline
When terminate plunger (22) motion carry out pressurize again in pressure reduction；Dead point after plunger (22) falls back on, operating pressure does not also drop to
During normal pressure, close water outlet stop valve (23), open water inlet stop valve (27), now the intake pressure phase of plunger cavity pressure and normal pressure
Deng；Plunger cavity pressure is less than operating pressure, and outlet valve (30) is closed, and controls plunger (22) to move to front dead point, closes
Close into water stop valve (27), open water outlet stop valve (23), make operating pressure and plunger cavity pressure equal again；Repeatable operation reaches
Control purpose to blood pressure lowering.
8. the test medium described in a kind of employing claim 3 or 4 can two-way flow control pressurer system control method, its
It is characterised by: it includes boosting rectifier control process, holding pressure control process and blood pressure lowering control process, in described control pressurer system
Plunger cavity is connected to water tank (28) by feed tube, is provided with water intaking valve (29) at the feed tube of described plunger cavity；
Wherein boosting rectifier control process is: closes water outlet stop valve (23) and unloader (25), unloader (25) is located at tested container
In mistake liquid pipe and water outlet stop valve (23) between, open water inlet stop valve (27), control plunger (22) to move to front dead point
Afterwards, close water inlet stop valve (27), during controlling plunger (22) to return rear dead point, medium will pass through water inlet from water tank (28)
Valve (29) is drawn in plunger cavity；When controlling plunger (22) to advance, water intaking valve (29) is automatically switched off under differential pressure action, opens out
Water stop valve (23), medium is pressed into tested container by water outlet stop valve (23) by plunger (22), makes the pressure in tested container
Raise；If plunger (22) forward travel to front dead point not yet reach goal pressure when, plunger (22) retreats again to rear dead point, enters
Water valve (29) automatically turns under differential pressure action, completes to suck medium action；Operation is repeated, until it reaches goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is, enters
Packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet stop valve
(23), now water inlet stop valve (27) is closed, and plunger (22) is moved forward and backward according to pressure feedback by controller,
Control the forward and reverse flowing of medium to reach constant voltage to require；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, directly opens
Open unloader (25), allow medium to pass through to bypass off-load, or directly open water outlet stop valve (23), water inlet stop valve (27) simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open water outlet
Stop valve (23), plunger cavity pressure is more than intake pressure, and water intaking valve (29) is closed；Plunger (22) is controlled to retreat, work
Make pressure and plunger cavity pressure is equal and slowly decline, plunger (22) motion can be terminated during decline at any time and carry out pressure reduction
In pressurize again；Dead point after plunger (22) falls back on, when operating pressure does not also drop to normal pressure, closes water outlet stop valve (23), opens
Water inlet stop valve (27), now plunger cavity pressure is equal with the intake pressure of normal pressure；Control plunger (22) to move to front dead point, close
Close into water stop valve (27), open water outlet stop valve (23), make operating pressure and plunger cavity pressure equal again；Repeatable operation reaches
Control purpose to blood pressure lowering.
9. the test medium described in a kind of employing claim 3 or 4 can two-way flow control pressurer system control method, its
It is characterised by: it includes boosting rectifier control process, holding pressure control process and blood pressure lowering control process, in described control pressurer system
Drain pipe connects to tested container, is provided with outlet valve (30) at the drain pipe of wherein said plunger cavity；Described plunger cavity pass through into
Liquid pipe connects to water tank (28), is provided with water intaking valve (29) at the feed tube of described plunger cavity；
Wherein boosting rectifier control process is: closes water outlet stop valve (23), unloader (25) and water inlet stop valve (27), unloader
(25) in the mistake liquid pipe between tested container and water outlet stop valve (23)；Plunger (22) is controlled to move back after moving to front dead point again
During dead point after returning, water intaking valve (29) automatically turns under differential pressure action, and medium will pass through water intaking valve from water tank (28)
(29) it is drawn in plunger cavity；Plunger (22) is controlled to advance, outlet valve (30) automatically turns under differential pressure action, plunger (22) will
Medium is pressed into tested container, makes the pressure rise in tested container；If plunger (22) forward travel not yet reaches mesh to front dead point
During mark pressure, plunger (22) retreats again to rear dead point, completes to suck medium action；Operation is repeated, until it reaches target
Pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, that is, enters
Packing state；When tested container need to make constant voltage pressurize, after control pressurer system reaches goal pressure, open water outlet stop valve
(23), now water inlet stop valve (27) is closed, and plunger (22) is moved forward and backward according to pressure feedback by controller,
Control the forward and reverse flowing of medium to reach constant voltage to require；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, directly opens
Open unloader (25), allow medium to pass through to bypass off-load, or directly open water outlet stop valve (23), water inlet stop valve (27) simultaneously,
Medium is allowed to return water tank off-load；When tested container need to be controlled to pressure reduction, after the completion of holding pressure control process, open out
Water stop valve (23), plunger cavity pressure is more than intake pressure, and water intaking valve (29) is closed；Plunger (22) is controlled to retreat,
Operating pressure and plunger cavity pressure are equal and slowly decline, and can terminate plunger motion at any time and carry out in pressure reduction during decline
Pressurize again；Dead point after plunger (22) falls back on, when operating pressure does not also drop to normal pressure, close water outlet stop valve (23), open into
Water stop valve (27), now plunger cavity pressure is equal with the intake pressure of normal pressure；Plunger cavity pressure is less than operating pressure, outlet valve
(30) it is closed, control plunger (22) to move to front dead point, close water inlet stop valve (27), open water outlet stop valve
(23), make operating pressure and plunger cavity pressure equal again；Repeatable operation reaches blood pressure lowering and controls purpose.
10. the test medium described in a kind of employing claim 5 can two-way flow control pressurer system control method, it is special
Levy and be: it includes boosting rectifier control process, holding pressure control process and blood pressure lowering control process, the quilt in described control pressurer system
It is parallel with two independent control pressure line a and control pressure line b, the post in wherein two control pressure lines between examination container and water tank (28)
Plug (22) can carry out alternating movement；
Wherein boosting rectifier control process is: closes the water outlet stop valve (23) in control pressure line a and control pressure line b and unloader
(25), in mistake liquid pipe between tested container and water outlet stop valve (23) for the unloader (25), control pressure line a and pressure control are opened
Water inlet stop valve (27) in line b；Plunger (22) is controlled after moving to front dead point, to return the mistake at rear dead point again in control pressure line a
Cheng Zhong, medium will be when water tank (28) be drawn into plunger cavity by stop valve (27) of intaking, and in control pressure line b, plunger (22) is return
Front dead point is moved again to afterwards behind dead point；Close water inlet stop valve (27) in control pressure line a, open water outlet stop valve (23), control
Plunger (22) from rear dead point, move forward by dead point, and medium is pressed into tested container, makes the pressure liter in tested container by plunger (22)
Gao Shi, the plunger (22) in control pressure line b returns rear dead point after moving to front dead point again, and medium will pass through water inlet from water tank (28)
Stop valve (27) is drawn into plunger cavity；If plunger (22) forward travel in control pressure line a is to front dead point still miss the mark pressure
During power, close water outlet stop valve (23) in control pressure line a, open control pressure line a water inlet stop valve (27), control pressure line b simultaneously
Middle closing water inlet stop valve (27), opens water outlet stop valve (23), and dead point is moved forward from rear dead point to control plunger (22), plunger
(22) medium is pressed into tested container；In control pressure line a, plunger (22) retreats again to rear dead point simultaneously, completes suction medium and moves
Make；Operation is repeated, control pressure line a and control pressure line b replaces supercharging, boost process can achieve and continuously uninterruptedly boosts, directly
To reaching goal pressure；
Wherein holding pressure control process is: when tested container is without constant voltage, after control pressurer system reaches goal pressure, closes control
Water outlet stop valve (23) in pressure pipeline a and control pressure line b, control pressurer system enters packing state；When tested container needs
When making constant voltage pressurize, after control pressurer system reaches goal pressure, the water outlet stop valve (23) in control pressure line a is not closed, and enters
Water stop valve (27) is closed, and the water outlet stop valve (23) in control pressure line b is closed, the plunger in control pressure line a
(22) can individually or simultaneously be moved forward and backward, control the forward and reverse flowing of medium to reach constant voltage and require, or in control pressure line b
Water outlet stop valve (23) is not closed, and water inlet stop valve (27) is closed, and the water outlet stop valve (23) in control pressure line b closes
Close, the plunger (22) in control pressure line b can individually or simultaneously be moved forward and backward, control the forward and reverse flowing of medium to reach constant voltage
Require, or the water outlet stop valve (23) in control pressure line a and control pressure line b is not closed, water inlet stop valve (27) is in closing shape
Water outlet stop valve (23) in state, control pressure line a and control pressure line b is closed, the plunger in control pressure line a and control pressure line b
(22) can individually or simultaneously be moved forward and backward, control the forward and reverse flowing of medium to reach constant voltage and require；
Wherein blood pressure lowering control process is: when tested container controls without pressure reduction, after the completion of holding pressure control process, directly opens
Open unloader (25), allow medium to pass through to bypass off-load, or directly open control pressure line a or control pressure line b or control pressure line a simultaneously
And the water outlet stop valve (23) in control pressure line b, water inlet stop valve (27), allow medium return water tank off-load；When tested container needs
Pressure reduction is controlled, in control pressure line a open water outlet stop valve (23), control plunger (22) retreat, operating pressure and
Plunger cavity pressure is equal and slowly declines, and can terminate plunger motion at any time and carry out pressurize again in pressure reduction during decline, with
This simultaneously, water outlet stop valve (23) in control pressure line b is closed, and water inlet stop valve (27) is opened；
The dead point after plunger (22) in control pressure line a falls back on, when operating pressure does not also drop to normal pressure, closes water outlet stop valve
(23), open water inlet stop valve (27), now plunger cavity pressure is equal with the intake pressure of normal pressure, meanwhile, control pressure line b
Middle unlatching water outlet stop valve (23), plunger (22) retrogressing, operating pressure and plunger cavity pressure are equal and slowly decline, and decline process
In can terminate plunger motion at any time and carry out pressurize again in pressure reduction；
The dead point after plunger (22) in control pressure line b falls back on, post when operating pressure does not also drop to normal pressure, in control pressure line a
Plug (22) moves to front dead point, closes water inlet stop valve (27), opens water outlet stop valve (23), makes operating pressure and plunger cavity pressure
Power is equal again；Repeatable operation, control pressure line a and control pressure line b alternating movement, pressure reduction can achieve and continuously uninterruptedly drops
Pressure, reaches blood pressure lowering and controls purpose.
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| CN201610739405.6A CN106444880B (en) | 2014-12-10 | 2014-12-10 | A kind of pair of 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 |
| CN201610739779.8A CN106444882B (en) | 2014-12-10 | 2014-12-10 | A kind of test medium can two-way flow compress control method |
| CN201610739536.4A CN106444881B (en) | 2014-12-10 | 2014-12-10 | Test medium can two-way flow compress control method |
| CN201610740476.8A CN107153435B (en) | 2014-12-10 | 2014-12-10 | For test medium can two-way flow compress control method |
| CN201610740421.7A CN106444883B (en) | 2014-12-10 | 2014-12-10 | To test medium can two-way flow compress control method |
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| CN201610740421.7A Division CN106444883B (en) | 2014-12-10 | 2014-12-10 | To test medium can two-way flow compress control method |
| CN201610739779.8A Division CN106444882B (en) | 2014-12-10 | 2014-12-10 | A kind of test medium can two-way flow compress control method |
| CN201610739536.4A Division CN106444881B (en) | 2014-12-10 | 2014-12-10 | Test medium can two-way flow compress control method |
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| CN201610740476.8A Active CN107153435B (en) | 2014-12-10 | 2014-12-10 | For test medium can two-way flow compress control method |
| CN201610739779.8A Active CN106444882B (en) | 2014-12-10 | 2014-12-10 | A kind of test medium can two-way flow compress control method |
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| CN201610739779.8A Active CN106444882B (en) | 2014-12-10 | 2014-12-10 | A kind of 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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| CN203430911U (en) * | 2013-08-14 | 2014-02-12 | 宁波恒力液压股份有限公司 | Pressure maintaining system for hydraulic machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106444882A (en) | 2017-02-22 |
| CN107153435B (en) | 2019-02-05 |
| CN106444883B (en) | 2019-03-22 |
| CN106444881B (en) | 2019-05-24 |
| CN106444883A (en) | 2017-02-22 |
| CN106444882B (en) | 2019-02-05 |
| CN106444880B (en) | 2019-03-22 |
| CN106444881A (en) | 2017-02-22 |
| CN106444880A (en) | 2017-02-22 |
| CN104460726A (en) | 2015-03-25 |
| CN107153435A (en) | 2017-09-12 |
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