CN109114071A - A kind of hydraulic automatic test oil source block system - Google Patents
A kind of hydraulic automatic test oil source block system Download PDFInfo
- Publication number
- CN109114071A CN109114071A CN201811245847.0A CN201811245847A CN109114071A CN 109114071 A CN109114071 A CN 109114071A CN 201811245847 A CN201811245847 A CN 201811245847A CN 109114071 A CN109114071 A CN 109114071A
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- Prior art keywords
- valve
- pneumatic reversal
- reversal valve
- automatic test
- source block
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 230000008676 import Effects 0.000 claims abstract description 4
- 239000002828 fuel tank Substances 0.000 claims description 10
- 239000003921 oil Substances 0.000 description 31
- 239000010720 hydraulic oil Substances 0.000 description 11
- 238000005259 measurement Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 201000009032 substance abuse Diseases 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of hydraulic automatic test oil source block systems, the hydraulic automatic test oil source block system includes pumping source and check valve, the positive import of the check valve is connect with pumping source, the outlet of the check valve is connected separately with the first connecting pin, second connection end, third connecting pin and the 4th connecting pin, first connecting pin is connected with pressure gauge, the second connection end is connected with two-way plug-in valve, the third connecting pin is connected with control cover board, 4th connecting pin is connected separately with the first Pneumatic reversal valve, second Pneumatic reversal valve, third Pneumatic reversal valve and the 4th Pneumatic reversal valve.The present invention with automatic pressure regulation and flow, can be capable of measuring the oil sources block of the hydraulic pressure testing device of tiny flow quantity and big flow, simple and compact for structure, alleviate labor intensity, improve work efficiency.
Description
Technical field
The present invention relates to hydraulic oil source block testing fields, and in particular to a kind of hydraulic automatic test oil source block system.
Background technique
Hydraulic pressure testing device, oil sources part is to provide the hydraulic oil of adjustable pressure and flow.
Structure is complicated for existing hydraulic automatic test oil source block system, layout comparison dispersion, with there are the four of internal leakage
Logical reversal valve realizes two output circuits, is unable to measure tiny flow quantity, the adjusting of pressure and flow generally manually operates, labor
Fatigue resistance is high, and working efficiency is low.
Summary of the invention
The present invention to solve the above-mentioned problems, to provide a kind of hydraulic automatic test oil source block system.
In order to achieve the above objectives, technical scheme is as follows:
A kind of hydraulic automatic test oil source block system, the hydraulic automatic test oil source block system include pumping source and unidirectional
The positive import of valve, the check valve is connect with pumping source, and the outlet of the check valve is connected separately with the first connecting pin, the second company
End, third connecting pin and the 4th connecting pin are connect, first connecting pin is connected with pressure gauge, and the second connection end is connected with two
Logical inserted valve, the third connecting pin are connected with control cover board, the 4th connecting pin be connected separately with the first Pneumatic reversal valve,
Second Pneumatic reversal valve, third Pneumatic reversal valve and the 4th Pneumatic reversal valve.
In a preferred embodiment of the invention, the spring cavity of the two-way plug-in valve is connect with control cover board.
In a preferred embodiment of the invention, safety valve, the second damper, third are equipped with inside the control cover board
Damper and the 4th damper.
In a preferred embodiment of the invention, the side of the control cover board is connected with off-load solenoid valve, described to unload
Charged magnet valve is connect with fuel tank.
In a preferred embodiment of the invention, proportional dump valve is installed at the top of the control cover board.
In a preferred embodiment of the invention, the 4th connecting pin includes first node and second node, described
The first Pneumatic reversal valve, the second Pneumatic reversal valve, third Pneumatic reversal valve and the 4th Pneumatic reversal valve are parallel on first node,
It is parallel with the 5th Pneumatic reversal valve and the 6th Pneumatic reversal valve on the second node, the 5th Pneumatic reversal valve is equipped with the
One pressure oil export, the 6th Pneumatic reversal valve are equipped with second pressure oil export.
In a preferred embodiment of the invention, it is in series with automatically controlled throttle valve on first Pneumatic reversal valve, it is described
Automatically controlled throttle valve is connected to fuel tank.
In a preferred embodiment of the invention, second Pneumatic reversal valve is connect with second node.
In a preferred embodiment of the invention, small-range flowmeter, institute are in series on the third Pneumatic reversal valve
Small-range flowmeter is stated to connect with second node.
In a preferred embodiment of the invention, it is in series with Mass Flow Meter on the 4th Pneumatic reversal valve, institute
Mass Flow Meter is stated to connect with second node.
The beneficial effects of the present invention are:
The present invention with automatic pressure regulation and flow, can be capable of measuring the oil of the hydraulic pressure testing device of tiny flow quantity and big flow
Source block, it is simple and compact for structure, labor intensity is alleviated, is improved work efficiency.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 1, hydraulic automatic test oil source block system provided by the invention comprising pumping source 1, check valve 2, pressure gauge
3, off-load solenoid valve 4, two-way plug-in valve 5, spring cavity 5-1, spool 5-2, control cover board 6, safety valve 6-1, the second damper 6-
2, third damper 6-3, the 4th damper 6-4, proportional dump valve 7, the first Pneumatic reversal valve 8, the second Pneumatic reversal valve 9,
Three Pneumatic reversal valves 10, the 4th Pneumatic reversal valve 11, the 5th Pneumatic reversal valve 12, the 6th Pneumatic reversal valve 13, a small amount of range of flow
Meter 14, Mass Flow Meter 15 and automatically controlled throttle valve 16.
Positive import P1 mouthfuls of pumping source 1 and check valve 2 are connected, and check valve 2 exports P2 mouthfuls and separates four tunnels, respectively first
Connecting pin, second connection end, third connecting pin and the 4th connecting pin, check valve 2 are for preventing from testing when pumping source 1 does not work
Oil liquid reverse flow in oil circuit drives oil pump reversion and damages pumping source 1.
First connecting pin is connected with pressure gauge 3, and second connection end is connected with two-way plug-in valve 5, and third connecting pin is connected with
Cover board 6 is controlled, the 4th connecting pin is connected separately with the first Pneumatic reversal valve 8, the second Pneumatic reversal valve 9, third Pneumatic reversal valve
10 and the 4th Pneumatic reversal valve 11.
The spring cavity 5-1 of two-way plug-in valve 5 is connect with control cover board 6.
It controls and is equipped with safety valve 6-1, the second damper 6-2, third damper 6-3, the 4th damper 6-4 inside cover board 6,
It is connected with off-load solenoid valve 4 in the side of control cover board 6, off-load solenoid valve 4 is connect with fuel tank, is installed at the top of control cover board 6
Proportional pressure regulator valve 7, proportional dump valve 7 can adjust setting pressure from tape controller by external input electric signal.
4th connecting pin specifically includes first node F1 and second node F2, and the first gas control is parallel on first node F1 and is changed
To valve 8, the second Pneumatic reversal valve 9, third Pneumatic reversal valve 10 and the 4th Pneumatic reversal valve 11, is parallel on second node F2
Five Pneumatic reversal valves 12 and the 6th Pneumatic reversal valve 13, the 5th Pneumatic reversal valve 12 be equipped with first pressure oil export F3, the 6th
Pneumatic reversal valve 13 is equipped with second pressure oil export F4.
Wherein, automatically controlled throttle valve 16 is in series on the first Pneumatic reversal valve 8, automatically controlled throttle valve 16 is connected to fuel tank, in this way
The minimum discharge of releasable pumping source, so as to obtain on first pressure oil export F3 and second pressure oil export F4 than pumping source 1
The smaller test flow of minimum discharge.
Second Pneumatic reversal valve 9 is connect with second node F2, can be used for not needing the occasion of detection flows.
Small-range flowmeter 14 is in series on third Pneumatic reversal valve 10, small-range flowmeter 14 and second node F2 connect
It connects, can be used for needing to detect the occasion of tiny flow quantity (including being tested valve internal leakage).
Mass Flow Meter 15 is in series on 4th Pneumatic reversal valve 11, Mass Flow Meter 15 and second node F2 connect
It connects, can be used for needing to detect the occasion of big flow.
By the setting of above structure, the application can control test flow size, and control mode is as follows:
Hydraulic oil for test comes from pumping source 1, unless oily air pump inoperative, at this moment the output flow of pumping source is zero, only
Want oil pump in working condition, even if also having the minimum output flow Qmin being not zero under minimum speed, when the revolving speed of pump
When for maximum permissible revolution, maximum output flow Qmax.Common test flow is defeated in the minimum output flow and maximum of pumping source
It between outflow, is realized by control oil pump.
When needing to be less than the test flow of pumping source minimum output flow, the QT2 mouth of the first Pneumatic reversal valve 8 is passed through compression
Air switchs to on-state, by adjusting the openings of sizes of automatically controlled throttle valve 16, discharges extra hydraulic oil, remaining is exactly to need
The test flow wanted.
In addition, the application can also control test pressure height, control mode is as follows:
(1), unloading condition:
When it is standby do not need pressure when, the electromagnet DT1 no power of off-load solenoid valve 4 flows through the control of third damper 6-3
Side X mouthfuls of liquefaction from control cover board 6 returns to fuel tank through off-load solenoid valve 4, and the spring cavity 5-1 pressure of inserted valve 5 is zero, two-way
The hydraulic pressure oil overhold valve opening core 5-2 of the A mouth of inserted valve 5 flows to B mouthfuls to fuel tank, then pressure (and the F1 node of the A mouth of inserted valve 5
Pressure) be zero, oil sources block pressure is in unloading condition, and the power of consumption is minimum, saved the energy,
(2), working pressure conditions:
The electromagnet DT1 of off-load solenoid valve 4 is powered, and control oil is isolated with fuel tank, is pre-adjusted safety valve 6-1 to than test
The slightly higher highest of pressure limits pressure, to ensure system safety, electricity consumption Signal Regulation ratio pressure regulator valve 7, input electrical signal and tune
Pressure direct proportionality is saved, when the pressure of the 5A of two-way plug-in valve 5 mouth reaches proportional dump valve setting pressure, two-way inserting
The hydraulic pressure oil overhold valve opening core 5-2 of the A mouth of valve 5 flows to B mouthfuls to fuel tank, then pressure (and the F1 node of the A mouth of two-way plug-in valve 5
Pressure) no longer rise, oil sources block pressure be proportional dump valve setting pressure.
According to different subjects, if use flowmeter, and using the flowmeter of what range, there is difference to want
It asks.Certain occasions do not require uninterrupted, do not need precise measurement flow, at this moment if flowmeter is also used, although to examination
Testing work itself does not influence, but excessively abuses flowmeter and will affect the service life of flowmeter, improves cost of equipment maintenance, this
Apply using the occasion of flowmeter in determination, small-range flowmeter is used in small flow, guarantees the measurement essence of tiny flow quantity
Degree；Mass Flow Meter is used in big flow, guarantees the selection by maximum test flow, for flowmeter access, this
The course of work of application is as follows:
When the second Pneumatic reversal valve 9 QT4 mouth connect compressed air and open, QT5 mouth of third Pneumatic reversal valve 10 with
The QT7 mouth of 4th Pneumatic reversal valve 11 is connected compressed air and is closed, and the hydraulic oil of F1 node flows through the second Pneumatic reversal valve 9 and arrives
Up to F2 node, flowmeter is not at this moment used；
When third Pneumatic reversal valve 10 QT6 mouth connect compressed air and open, QT3 mouth of the second Pneumatic reversal valve 9 with
The QT7 mouth of 4th Pneumatic reversal valve 11 is connected compressed air and is closed, and small flowmeter 14, the hydraulic oil meeting of F1 node are at this moment selected
It flows through third Pneumatic reversal valve 10 and small-range flowmeter 14 reaches F2 node；
When the 4th Pneumatic reversal valve 11 QT8 mouth connect compressed air and open, QT3 mouth of the second Pneumatic reversal valve 9 with
The QT5 mouth of third Pneumatic reversal valve 10 is connected compressed air and is closed, and at this moment selects Mass Flow Meter 15, F1 node it is hydraulic
Oil can flow through the 4th Pneumatic reversal valve 11 and Mass Flow Meter 15 reaches F2 node.
In addition, the access that the application can also export hydraulic oil, is controlled, control mode is as follows:
Since tested object needs more than one channel to access hydraulic oil (but not being also turned on), and from each other not
There can be Leakage Energy to gang up, so also carrying out access control using Pneumatic reversal valve.Detailed process is as follows:
When the QT10 mouth of the 5th Pneumatic reversal valve 12 connects compressed air and open, the QT11 mouth of the 6th Pneumatic reversal valve 13
It connects compressed air and closes, at this moment, the hydraulic oil of F2 node can flow through the 5th Pneumatic reversal valve 12 arrival first pressure oil and go out
Mouth F3.
When the QT12 mouth of the 6th Pneumatic reversal valve 13 connects compressed air and open, the QT9 mouth of the 5th Pneumatic reversal valve 12
It connects compressed air and closes, at this moment, the hydraulic oil of F2 node can flow through the 6th Pneumatic reversal valve 13 arrival second pressure oil and go out
Mouth F4.
Implementation through the above scheme, the application can reach following effect:
(1) oil sources block pressure it can be in unloading condition when standby with automatic pressure control, unloading channel, consumption
Power is minimum, has saved the energy；
(2) can be with automatic control flow, the Pneumatic reversal valve of bypass is connected automatically controlled throttle-valve structure, can with when oil sources block take
The test flow also smaller than oil pump minimum output flow is obtained, flow adjustment range is expanded；
(3) it can automatically select with or without flowmeter channel, automatically select small-range flowmeter channel or a large amount of range of flow
Channel is counted, it is accurate to guarantee flow measurement precision without internal hydraulic pressure oil seepage between channel；
(4) artificial directly operation is avoided, labor intensity is alleviated, improves work efficiency.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of hydraulic automatic test oil source block system, which is characterized in that the hydraulic automatic test oil source block system includes pump
The positive import of source and check valve, the check valve is connect with pumping source, and the outlet of the check valve is connected separately with the first connection
End, second connection end, third connecting pin and the 4th connecting pin, first connecting pin are connected with pressure gauge, second connection
End is connected with two-way plug-in valve, and the third connecting pin is connected with control cover board, and the 4th connecting pin is connected separately with first
Pneumatic reversal valve, the second Pneumatic reversal valve, third Pneumatic reversal valve and the 4th Pneumatic reversal valve.
2. the hydraulic automatic test oil source block system of one kind according to claim 1, which is characterized in that the two-way plug-in valve
Spring cavity with control cover board connect.
3. the hydraulic automatic test oil source block system of one kind according to claim 1, which is characterized in that in the control cover board
Portion is equipped with safety valve, the second damper, third damper and the 4th damper.
4. the hydraulic automatic test oil source block system of one kind according to claim 1, which is characterized in that the control cover board
Side is connected with off-load solenoid valve, and the off-load solenoid valve is connect with fuel tank.
5. the hydraulic automatic test oil source block system of one kind according to claim 1, which is characterized in that the control cover board top
Portion is equipped with proportional dump valve.
6. the hydraulic automatic test oil source block system of one kind according to claim 1, which is characterized in that the 4th connecting pin
Including first node and second node, the first Pneumatic reversal valve, the second Pneumatic reversal valve, third are parallel on the first node
Pneumatic reversal valve and the 4th Pneumatic reversal valve are parallel with the 5th Pneumatic reversal valve and the commutation of the 6th gas control on the second node
Valve, the 5th Pneumatic reversal valve are equipped with first pressure oil export, and the 6th Pneumatic reversal valve is equipped with second pressure oil
Outlet.
7. the hydraulic automatic test oil source block system of one kind according to claim 6, which is characterized in that first gas control changes
Automatically controlled throttle valve is in series on valve, the automatically controlled throttle valve is connected to fuel tank.
8. the hydraulic automatic test oil source block system of one kind according to claim 6, which is characterized in that second gas control changes
It is connect to valve with second node.
9. the hydraulic automatic test oil source block system of one kind according to claim 6, which is characterized in that the third gas control changes
Small-range flowmeter is in series on valve, the small-range flowmeter is connect with second node.
10. the hydraulic automatic test oil source block system of one kind according to claim 6, which is characterized in that the 4th gas control
Mass Flow Meter is in series on reversal valve, the Mass Flow Meter is connect with second node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245847.0A CN109114071B (en) | 2018-10-24 | 2018-10-24 | Hydraulic automatic oil source block testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245847.0A CN109114071B (en) | 2018-10-24 | 2018-10-24 | Hydraulic automatic oil source block testing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109114071A true CN109114071A (en) | 2019-01-01 |
| CN109114071B CN109114071B (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811245847.0A Active CN109114071B (en) | 2018-10-24 | 2018-10-24 | Hydraulic automatic oil source block testing system |
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| Country | Link |
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| CN (1) | CN109114071B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827767A (en) * | 2019-02-28 | 2019-05-31 | 上海立新液压有限公司 | A kind of hydraulic valve automatic testing stand frame |
| CN113606206A (en) * | 2021-05-26 | 2021-11-05 | 广州嘉泰液压机电有限公司 | Hydraulic test oil source system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526441A (en) * | 2009-04-23 | 2009-09-09 | 北京天地玛珂电液控制系统有限公司 | Large-flow safety valve test system |
| CN102493974A (en) * | 2011-12-28 | 2012-06-13 | 中国人民解放军65185部队 | Hydraulic oil circuit suitable for tests of multiple kinds of hydraulic components |
| CN202370940U (en) * | 2011-12-28 | 2012-08-08 | 中国人民解放军65185部队 | Hydraulic oil way suitable for various hydraulic element tests |
| CN103257023A (en) * | 2013-05-22 | 2013-08-21 | 南京埃尔法电液技术有限公司 | Hydraulic normally-closed prefill valve testing device |
| CN106706277A (en) * | 2015-11-15 | 2017-05-24 | 富强 | Ultrahigh-pressure and emulsion hydraulic support valve integrated test test-bed |
| CN109827767A (en) * | 2019-02-28 | 2019-05-31 | 上海立新液压有限公司 | A kind of hydraulic valve automatic testing stand frame |
| CN208966773U (en) * | 2018-10-24 | 2019-06-11 | 上海立新液压有限公司 | A kind of hydraulic automatic test oil source block system |
-
2018
- 2018-10-24 CN CN201811245847.0A patent/CN109114071B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526441A (en) * | 2009-04-23 | 2009-09-09 | 北京天地玛珂电液控制系统有限公司 | Large-flow safety valve test system |
| CN102493974A (en) * | 2011-12-28 | 2012-06-13 | 中国人民解放军65185部队 | Hydraulic oil circuit suitable for tests of multiple kinds of hydraulic components |
| CN202370940U (en) * | 2011-12-28 | 2012-08-08 | 中国人民解放军65185部队 | Hydraulic oil way suitable for various hydraulic element tests |
| CN103257023A (en) * | 2013-05-22 | 2013-08-21 | 南京埃尔法电液技术有限公司 | Hydraulic normally-closed prefill valve testing device |
| CN106706277A (en) * | 2015-11-15 | 2017-05-24 | 富强 | Ultrahigh-pressure and emulsion hydraulic support valve integrated test test-bed |
| CN208966773U (en) * | 2018-10-24 | 2019-06-11 | 上海立新液压有限公司 | A kind of hydraulic automatic test oil source block system |
| CN109827767A (en) * | 2019-02-28 | 2019-05-31 | 上海立新液压有限公司 | A kind of hydraulic valve automatic testing stand frame |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827767A (en) * | 2019-02-28 | 2019-05-31 | 上海立新液压有限公司 | A kind of hydraulic valve automatic testing stand frame |
| CN109827767B (en) * | 2019-02-28 | 2024-03-01 | 上海立新液压有限公司 | Automatic test bench for hydraulic valve |
| CN113606206A (en) * | 2021-05-26 | 2021-11-05 | 广州嘉泰液压机电有限公司 | Hydraulic test oil source system |
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| Publication number | Publication date |
|---|---|
| CN109114071B (en) | 2024-04-09 |
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