CN102878153A - Pump-controlled switching device of multi-way valve testing platform, and switching controlling method of pump-controlled switching device - Google Patents
Pump-controlled switching device of multi-way valve testing platform, and switching controlling method of pump-controlled switching device Download PDFInfo
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- CN102878153A CN102878153A CN2012104388977A CN201210438897A CN102878153A CN 102878153 A CN102878153 A CN 102878153A CN 2012104388977 A CN2012104388977 A CN 2012104388977A CN 201210438897 A CN201210438897 A CN 201210438897A CN 102878153 A CN102878153 A CN 102878153A
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Abstract
The invention relates to a pump-controlled switching device, in particular to a pump-controlled switching device of a multi-way valve testing platform as well as a switching controlling method of the pump-controlled switching device, the pump-controlled switching device comprises a variable frequency motor, a load-sensitive constant pressure pump, an electronic proportional overflow valve and three electromagnetic reversing valves, wherein the variable frequency motor is connected with the load-sensitive constant pressure pump and is capable of changing the maximal testing the flow of the system; a feedback port of the load-sensitive constant pressure pump is connected with the first electromagnetic reversing valve; a normally closed port of the first electromagnetic steering valve is connected with a damping hole in serial and is connected with an outlet of the load-sensitive constant pressure pump; a normally open port of the first electromagnetic reversing valve is connected with the second electromagnetic reversing valve in serial and is connected with an LS port of a testing valve; the third electromagnetic reversing valve is connected with the proportional overflow valve in serial and is connected with an oil tank, and the third electromagnetic reversing valve and the second electromagnetic reversing valve are connected on the normally open port of the first electromagnetic reversing valve in parallel. According to the pump-controlled switching device, the multi-way valve testing platform tends to be universal; and a great amount of overflow is avoided in the testing process, and the heating value is reduced to save the energy.
Description
Technical field
The present invention relates to a kind of pump control COMM communication, specifically a kind of pump control COMM communication and method for handover control thereof of multi-way valve test stand.
Background technique
During due to the production at hydraulic multitandem valve and research and development, need to carry out type approval test and delivery test to the product of producing, according to the test specification requirement, the test of multi-way valve need to be carried out to the valve of different types pressure test, interior leakage test.Such as when carrying out pressure test, needing pump is that constant voltage is controlled; When carrying out the internal leakage test, need under the requirement of different pressures, carry out pressurize, need long-range pressure regulation; And, when being closed the test of core formula multi-way valve, need load-sensitive to control; When being opened core formula multi-way valve, need metering pump to control.
The development and Design of multi-way valve more and more is tending towards diversity at present, and different operating modes, need different multi-way valve under different environment, and this becomes increasingly complex the test detection of multi-way valve, and kind is more and more; This just requires test stand to be tending towards versatility, that is to say that a kind of test stand can adapt to multi-form multi-way valve and be tested, and, in prior art, does not also have a kind of multi-way valve test stand can meet above requirement.
Summary of the invention
Technical problem to be solved by this invention is, a kind of pump control COMM communication and method for handover control thereof of multi-way valve test stand are proposed, can make the multi-way valve test stand be tending towards versatility, and do not have a large amount of overflows in the process of test, reduce heating value and energy-conservation.
The technological scheme that the present invention solves above technical problem is:
A kind of pump control COMM communication of multi-way valve test stand, comprise variable-frequency motor, load-sensitive constant pressure pump, electric proportional pressure control valve, reach three solenoid directional control valves; The import of load-sensitive constant pressure pump is communicated with fuel tank, and outlet is connected to the multi-way valve test stand, and variable-frequency motor connects driving load-sensitive constant pressure pump, can change the test peak rate of flow of system; The feedback port of load-sensitive constant pressure pump and the first solenoid directional control valve link, behind the normally closed port series damped hole of the first solenoid directional control valve, with load-sensitive constant voltage delivery side of pump, be connected, the normal opening of the first solenoid directional control valve and the feedback LS mouth that connects pet valve after the second solenoid directional control valve is connected; The 3rd solenoid directional control valve be connected to fuel tank after proportional pressure control valve is connected, and be connected in parallel on the normal opening of the first solenoid directional control valve with the second solenoid directional control valve.
The method for handover control of the pump control COMM communication of multi-way valve test stand comprises following control:
(i) work as underproof valve for opening core formula multi-way valve, the first solenoid directional control valve is obtained electric, the second solenoid directional control valve, the 3rd solenoid directional control valve and the equal dead electricity of electric proportional pressure control valve, the control mode of load-sensitive constant pressure pump is metering pump, the load-sensitive constant pressure pump is exported with maximum pump discharge;
(ii) working as underproof valve is the enclosed multi-way valve, makes the first solenoid directional control valve dead electricity, and the second solenoid directional control valve obtains electric, the 3rd solenoid directional control valve and the equal dead electricity of electric proportional pressure control valve, the variable displacement pump that the control mode of load-sensitive constant pressure pump is load-sensitive;
(iii) when carrying out pressure test, the first solenoid directional control valve is obtained electric, the second solenoid directional control valve dead electricity, the 3rd solenoid directional control valve and the equal dead electricity of electric proportional pressure control valve, pressure due to induced pressure Overpressure of a safety valve recuperation valve, so the load-sensitive constant pressure pump is the constant voltage control mode, the flow of Laboratory Furniture hydraulic system is only the leakage rate of multi-way valve;
(iv) when carrying out the internal leakage test, make all dead electricity of the first solenoid directional control valve and the second solenoid directional control valve, the 3rd solenoid directional control valve obtains electric, and electric proportional pressure control valve obtains electric, and need the electric current of pressure to the corresponding test of proportional pressure control valve, now the load-sensitive constant pressure pump keeps constant voltage under given pressure.
The technological scheme that the present invention further limits is:
The pump control COMM communication of aforesaid multi-way valve test stand, the first solenoid directional control valve is 23 through-current capacity valves, and the second solenoid directional control valve is 22 logical selector valves, and the 3rd solenoid directional control valve is 22 logical selector valves.
The invention has the beneficial effects as follows:
The present invention controls simply, in the process of test, in the situation that do not stop motor, can change the control mode of pump constant voltage, constant current, long-range constant voltage and fixed displacement, pump is converted with the need in the process of test, can be according to testing the different demands of different phase to pressure flow, and pressure and flow that distribution adapts, the spill losses of minimizing system, reduce the heating of system, energy-saving and emission-reduction.
Apparatus of the present invention can realize out core formula multi-way valve test very easily and close the switching of core formula multi-way valve test, and do not need to change any hydraulic element, have strengthened the versatility of testing apparatus.
In a word, the present invention can make the multi-way valve test stand be tending towards versatility for after the power source of experimental bench system, and a kind of test stand can adapt to multi-form multi-way valve to be tested, and has hardly a large amount of overflows in the process of test, reduce heating value, thus energy-conservation.
The accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
Embodiment
The present embodiment is a kind of pump control COMM communication of multi-way valve test stand, connect as shown in Figure 1, comprise variable-frequency motor 2, load-sensitive constant pressure pump 3, electric proportional pressure control valve 7, reach solenoid directional control valve 5,6 and 8, the first solenoid directional control valve 8 is 23 through-current capacity valves, and the second solenoid directional control valve 5 and the 3rd solenoid directional control valve 6 are all 22 logical selector valves; The import of load-sensitive constant pressure pump 3 is communicated with fuel tank 1, and outlet is connected to the multi-way valve test stand, and variable-frequency motor 2 connects driving load-sensitive constant pressure pump 3, can change the test peak rate of flow of system; The feedback port X of load-sensitive constant pressure pump 3 and 23 through-current capacity valves 8 link, behind the normally closed port series damped hole 4 of 23 through-current capacity valves 8, with the outlet of load-sensitive constant pressure pump 3, be connected, the normal opening of 23 through-current capacity valves 8 leads to after selector valves 5 are connected with 22 the LS mouth that connects pet valve; 22 logical selector valves 6 be connected to fuel tank 1 after proportional pressure control valve 7 is connected, and with 22 lead to the normal opening that selector valve 5 is connected in parallel on 23 through-current capacity valves 8.
The pump control COMM communication of the multi-way valve test stand of the present embodiment also comprises load-sensitive recuperation valve 9 and pressure-compensated valve 10, and these two valves are integrated on oil hydraulic pump, and the load-sensitive recuperation valve is to make the pump constant flux control, and pressure-compensated valve is that the pump constant voltage is controlled.
This device is mainly used in the power source of multi-way valve multi-function test stand, both can adapt to out core formula multi-way valve (for Constant Pump System), can adapt to again and close core formula multi-way valve (for variable pump systems), and no matter be different tests stage of multi-way valve type approval test or delivery test can switchable pump the control pattern, the demand of adaptive system to flow, thus play energy-conserving action.
The method for handover control of the pump control COMM communication of the present embodiment multi-way valve test stand comprises following control:
(i) work as underproof valve for opening core formula multi-way valve, make the first solenoid directional control valve 8 obtain electric, the second solenoid directional control valve 5, the 3rd solenoid directional control valve 6 and the equal dead electricity of electric proportional pressure control valve 7, the control mode of load-sensitive constant pressure pump 3 is metering pump, load-sensitive constant pressure pump 3 is exported with maximum pump discharge;
(ii) working as underproof valve is the enclosed multi-way valve, makes the first solenoid directional control valve 8 dead electricity, and the second solenoid directional control valve 5 obtains electric, the 3rd solenoid directional control valve 6 and the equal dead electricity of electric proportional pressure control valve 7, the variable displacement pump that the control mode of load-sensitive constant pressure pump 3 is load-sensitive;
(iii) when carrying out pressure test, during due to pressure test, flow is very little, and pressurize 5 minutes, now needs constant voltage to control, otherwise cause a large amount of spill lossess, heating value is very large, the first solenoid directional control valve 8 is obtained electric, the second solenoid directional control valve 5 dead electricity, the 3rd solenoid directional control valve 6 and the equal dead electricity of electric proportional pressure control valve 7, due to the pressure of induced pressure Overpressure of a safety valve recuperation valve, so load-sensitive constant pressure pump 3 is the constant voltage control mode, the flow of experimental bench system is only the leakage rate of multi-way valve;
(iv) when carrying out the internal leakage test, need to detect the internal leakage of multi-way valve under different pressures, equally also because the leakage rate of valve is smaller, be generally the milliliter level, now also need constant voltage to control, and will be under different pressure, now need to carry out long-range Regulation Control, so now make all dead electricity of the first solenoid directional control valve 8 and the second solenoid directional control valve 5, the 3rd solenoid directional control valve 6 obtains electric, electricity proportional pressure control valve 7 obtains electric, and needs the electric current of pressure to the corresponding test of proportional pressure control valve 7, and now load-sensitive constant pressure pump 3 keeps constant voltage under given pressure.
The present invention is in the process of test, in the situation that do not stop motor, can change the control mode of pump constant voltage, constant current, long-range constant voltage and fixed displacement, pump is converted with the need in the process of test, can be according to the test different phase to the different demands of pressure flow, and distribute pressure and the flow adapted, reduce the spill losses of system, the heating of minimizing system, energy-saving and emission-reduction.
In addition to the implementation, the present invention can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (3)
1. the pump control COMM communication of a multi-way valve test stand, is characterized in that: comprise variable-frequency motor (2), load-sensitive constant pressure pump (3), electric proportional pressure control valve (7), reach three solenoid directional control valves (5,6,8); The import of load-sensitive constant pressure pump (3) is communicated with fuel tank (1), and outlet is connected to the multi-way valve test stand, and variable-frequency motor (2) connects driving load-sensitive constant pressure pump (3); The feedback port (X) of load-sensitive constant pressure pump (3) links with the first solenoid directional control valve (8), with the outlet of load-sensitive constant pressure pump (3), is connected behind the normally closed port series damped hole (4) of the first solenoid directional control valve (8), the normal opening of the first solenoid directional control valve (8) with connect by the feedback LS mouth of pet valve after the second solenoid directional control valve (5) is connected; The 3rd solenoid directional control valve (6) be connected to fuel tank (1) after electric proportional pressure control valve (7) is connected, and be connected in parallel on the normal opening of the first solenoid directional control valve (8) with the second solenoid directional control valve (5).
2. the pump control COMM communication of multi-way valve test stand as claimed in claim 1, it is characterized in that: described the first solenoid directional control valve (8) is 23 through-current capacity valves, described the second solenoid directional control valve (5) is 22 logical selector valves, and the 3rd solenoid directional control valve (6) is 22 logical selector valves.
3. the method for handover control of the pump control COMM communication of the described multi-way valve test stand of claim 1 or 2 is characterized in that: comprise following control step:
(i) work as underproof valve for opening core formula multi-way valve, the first solenoid directional control valve (8) is obtained electric, the second solenoid directional control valve (5), the 3rd solenoid directional control valve (6) and electric proportional pressure control valve (7) be dead electricity all, the control mode of load-sensitive constant pressure pump (3) is metering pump, and load-sensitive constant pressure pump (3) is exported with maximum pump discharge;
(ii) working as underproof valve is the enclosed multi-way valve, make the first solenoid directional control valve (8) dead electricity, the second solenoid directional control valve (5) obtains electric, and the 3rd solenoid directional control valve (6) and electric proportional pressure control valve (7) be dead electricity all, the variable displacement pump that the control mode of load-sensitive constant pressure pump (3) is load-sensitive;
(iii) when carrying out pressure test, the first solenoid directional control valve (8) is obtained electric, the second solenoid directional control valve (5) dead electricity, the 3rd solenoid directional control valve (6) and electric proportional pressure control valve (7) be dead electricity all, pressure due to induced pressure Overpressure of a safety valve recuperation valve, so load-sensitive constant pressure pump (3) is the constant voltage control mode, the flow of test stand is only the leakage rate of the first solenoid directional control valve (8);
(iv) when carrying out the internal leakage test, make all dead electricity of the first solenoid directional control valve (8) and the second solenoid directional control valve (5), the 3rd solenoid directional control valve (6) obtains electric, electricity proportional pressure control valve (7) obtains electric, and need the electric current of detected pressures to the corresponding test of proportional pressure control valve (7), now load-sensitive constant pressure pump (3) keeps constant voltage under given pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210438897.7A CN102878153B (en) | 2012-11-06 | 2012-11-06 | Pump-controlled switching device of multi-way valve testing platform, and switching controlling method of pump-controlled switching device |
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| CN201210438897.7A CN102878153B (en) | 2012-11-06 | 2012-11-06 | Pump-controlled switching device of multi-way valve testing platform, and switching controlling method of pump-controlled switching device |
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| CN102878153B CN102878153B (en) | 2015-03-18 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104533881A (en) * | 2014-12-04 | 2015-04-22 | 上海中联重科桩工机械有限公司 | System and method for determining travelling deviation reason of construction mechanism |
| CN105545878A (en) * | 2016-01-27 | 2016-05-04 | 武汉科技大学 | Transient-pressure oil supply system for multi-way valve test stand |
| CN107630847A (en) * | 2017-09-15 | 2018-01-26 | 太原理工大学 | Electric ratio pressure continuously regulates and controls hydraulic motor/pump |
| CN107762995A (en) * | 2017-09-13 | 2018-03-06 | 江苏恒立液压科技有限公司 | Novel electric proportional overflow device |
| CN109026637A (en) * | 2018-09-27 | 2018-12-18 | 天津市中重科技工程有限公司 | A kind of novel DRG hydraulic pump parallel connection concentration remote pressure control loop |
| CN106274605B (en) * | 2016-08-18 | 2019-02-19 | 广西柳工机械股份有限公司 | Quarry tipper load-sensitive combining hydraulic system |
| CN113236616A (en) * | 2021-05-26 | 2021-08-10 | 广州嘉泰液压机电有限公司 | Proportional variable pump control device and control method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533881A (en) * | 2014-12-04 | 2015-04-22 | 上海中联重科桩工机械有限公司 | System and method for determining travelling deviation reason of construction mechanism |
| CN105545878A (en) * | 2016-01-27 | 2016-05-04 | 武汉科技大学 | Transient-pressure oil supply system for multi-way valve test stand |
| CN106274605B (en) * | 2016-08-18 | 2019-02-19 | 广西柳工机械股份有限公司 | Quarry tipper load-sensitive combining hydraulic system |
| CN107762995A (en) * | 2017-09-13 | 2018-03-06 | 江苏恒立液压科技有限公司 | Novel electric proportional overflow device |
| CN107762995B (en) * | 2017-09-13 | 2023-12-22 | 江苏恒立液压科技有限公司 | Novel electric proportion overflow device |
| CN107630847A (en) * | 2017-09-15 | 2018-01-26 | 太原理工大学 | Electric ratio pressure continuously regulates and controls hydraulic motor/pump |
| CN107630847B (en) * | 2017-09-15 | 2019-04-30 | 太原理工大学 | Electric ratio pressure continuously regulates and controls hydraulic motor/pump |
| CN109026637A (en) * | 2018-09-27 | 2018-12-18 | 天津市中重科技工程有限公司 | A kind of novel DRG hydraulic pump parallel connection concentration remote pressure control loop |
| CN113236616A (en) * | 2021-05-26 | 2021-08-10 | 广州嘉泰液压机电有限公司 | Proportional variable pump control device and control method thereof |
| CN113236616B (en) * | 2021-05-26 | 2022-01-11 | 广州嘉泰液压机电有限公司 | Proportional variable pump control device and control method thereof |
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