CN204855244U - A water pressure loading system for static test - Google Patents
A water pressure loading system for static test Download PDFInfo
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- CN204855244U CN204855244U CN201520553532.8U CN201520553532U CN204855244U CN 204855244 U CN204855244 U CN 204855244U CN 201520553532 U CN201520553532 U CN 201520553532U CN 204855244 U CN204855244 U CN 204855244U
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Abstract
The utility model provides a water pressure loading system for static test, including controller, converter, inverter motor, plunger pump and delivery port governing valve. The utility model discloses a converter and inverter motor make speed of flooding controllable, have broken away from the method with the ftercompction of hand pump developments, and motor rotation number is more even moreover, and rivers " the thigh advances " condition is alleviated, through adopting the plunger pump not only to improve the load upper limit, prevent into water backward flow in addition, make also that to intake the velocity of flow more even, make the mode enable at inlet tube department setting pressure table, the simultaneous control ware as requested the apply pressure signal and need the pressure vessel's of test pressure feedback signal, the output of automatically regulated analog quantity AO, and then control speed of flooding make the error stable in %1's scope, better have satisfied the required precision.
Description
Technical field
The utility model relates to Water hydraulic static pressure loading experimental technique field, is specially a kind of Water hydraulic static pressure loading system for slow test.
Background technology
The pressure-resistive products such as solid rocket motor case are when carrying out intensity slow test, need to carry out hydraulic pressure and record test, testing requirements carries out Water hydraulic static pressure loading step by step to pressure vessel, observe pressure vessel and whether unstability occurs, and in case of need hydraulic pressure demolition is carried out to pressure vessel, the research stress situation of pressure vessel under different hydraulic pressure load, determines that whether pressure vessel because of pressure in certain or external pressure, unstability or destruction occurs.
Adopt in test power frequency 50Hz Control of Voltage pump motor at present, water feeding of water pump constant airspeed makes hydraulic pressure uncontrollable, and protect when carrying and need with the dynamic ftercompction of wobble pump and multistage loadings, control accuracy is poor and waste time and energy.During pump motor water inlet, current are " stock enters " mode in addition, therefore the force value that result in water inlet pipe place produces fluctuation, tested at pressure vessel water outlet place setting pressure table in the past, pressure acquisition value is tended to be steady, but add limitation to the selection of pressure vessel, also destroy the integrality of Water hydraulic static pressure loading system.And the hydraulic testing of some product is protected and is carried a process entails pressure error and control within the scope of ± %1, so control overflow is comparatively strict; When in loading procedure, load is excessive, make-up water pump motor easily breaks down shutdown, affects normal assays, and choose reasonable motor, setting loading range are also one of demands.In addition need dynamic acquisition pressure data in process of the test, draw loading curve, therefore operating personnel to use host computer to carry out Long-distance Control also very necessary.
Summary of the invention
The technical matters solved
The utility model one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, an object of the present utility model is to provide a kind of Water hydraulic static pressure loading system for slow test, adopts frequency conversion loading method, frequency converter output frequency is controlled by PLC analog output, and then regulate variable-frequency motor rotating speed, to reach control water intake velocity, regulate the object of hydraulic pressure.
Technical scheme
In one of the present utility model, the utility model proposes a kind of Water hydraulic static pressure loading system for slow test, it is characterized in that: comprise controller, frequency converter, variable-frequency motor, ram pump and water delivering orifice variable valve; The on-load pressure signal required and the pressure feedback signal input control device of pressure vessel that need test, controller outputs control signals to frequency converter, frequency converter outputs signal to variable-frequency motor, and variable-frequency motor drives ram pump to the pressure vessel water filling that need test pressurization; Frequency converter, by changing the rotating speed of variable-frequency motor and then changing the flow that ram pump exports water, makes the pressure of pressure vessel follow setting pressure change in the scope that error allows; Water delivering orifice variable valve is controlled by the controller, for playing pressure regulation in the reservoir pressure decline stage that need test.
According to embodiment of the present utility model, this Water hydraulic static pressure loading system being used for slow test adds frequency converter in variable-frequency motor point of incoming cables, export analog quantity voltage by controller and set frequency conversion value, make water intake velocity controlled, broken away from the method with the dynamic ftercompction of wobble pump.And traditional pump motor is replaced by variable-frequency motor, motor speed is more even, and current " stock enters " situation is eased; In inlet pipeline, add triple channel plunger assembly again, not only increase the loading upper limit, prevent from, into water backflow, also making into water flow velocity more even, making to become possibility in the mode of water inlet pipe place setting pressure table.In addition, controller on-load pressure signal as requested and the pressure feedback signal of pressure vessel that need test, automatic adjustment analog quantity AO exports, and then control water intake velocity, error is stabilized in ± scope of %1, meet accuracy requirement preferably, overcome longer to hold time and that pressure controling precision is higher test, the problem of accuracy requirement cannot be reached by the dynamic ftercompction mode of wobble pump.For the problem of motor disorderly closedown because load is excessive, adopt the variable-frequency motor supporting with converter plant, and set frequency conversion output area according to power of motor, efficiently solve the problem of disorderly closedown.In addition for the requirement needing dynamic acquisition pressure data in process of the test, because pressure instrumentation does not have data buffer area, so adopt controller and instrument communication, and set up host computer configuration picture, achieve the Real-time Collection of gauge pressure data and the automatic control of pressure-loaded process.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1: Water hydraulic static pressure loading system architecture composition diagram;
Fig. 2: Water hydraulic static pressure loading Systematical control schematic diagram;
Fig. 3: actual pressure controlling curve in embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
The pressure-resistive products such as solid rocket motor case are when carrying out intensity slow test, need to carry out hydraulic pressure and record test, testing requirements carries out Water hydraulic static pressure loading step by step to pressure vessel, observe pressure vessel and whether unstability occurs, and in case of need hydraulic pressure demolition is carried out to pressure vessel, the research stress situation of pressure vessel under different hydraulic pressure load, determines that whether pressure vessel because of pressure in certain or external pressure, unstability or destruction occurs.
Adopt in test power frequency 50Hz Control of Voltage pump motor at present, water feeding of water pump constant airspeed makes hydraulic pressure uncontrollable, and protect when carrying and need with the dynamic ftercompction of wobble pump and multistage loadings, control accuracy is poor and waste time and energy.During pump motor water inlet, current are " stock enters " mode in addition, therefore the force value that result in water inlet pipe place produces fluctuation, tested at pressure vessel water outlet place setting pressure table in the past, pressure acquisition value is tended to be steady, but add limitation to the selection of pressure vessel, also destroy the integrality of Water hydraulic static pressure loading system.And the hydraulic testing of some product is protected and is carried a process entails pressure error and control within the scope of ± %1, so control overflow is comparatively strict; When in loading procedure, load is excessive, make-up water pump motor easily breaks down shutdown, affects normal assays, and choose reasonable motor, setting loading range are also one of demands.In addition need dynamic acquisition pressure data in process of the test, draw loading curve, therefore operating personnel to use host computer to carry out Long-distance Control also very necessary.
For the problems referred to above, a kind of Water hydraulic static pressure loading system for slow test is adopted in the present embodiment, as depicted in figs. 1 and 2, Water hydraulic static pressure loading system comprises controller, frequency converter, variable-frequency motor, ram pump and water delivering orifice variable valve, principle changes the frequency of control voltage and the stator phase voltage of motor to regulate the rotating speed of AC motor by frequency converter, and then driving ram pump to be directly that pressure vessel water filling is pressurizeed, object is the withstand voltage degree of test pressure container.
On the control structure, controller adopts siemens PLC CPU, and frequency converter adopts Siemens MM440 frequency converter; The on-load pressure signal required and the pressure feedback signal input control device of pressure vessel that need test, controller is by the on-load pressure signal that compares requirement and the pressure feedback signal of pressure vessel that need test, output control signals to frequency converter, frequency converter outputs signal to variable-frequency motor, and variable-frequency motor drives ram pump to the pressure vessel water filling that need test pressurization; Frequency converter, by changing the rotating speed of variable-frequency motor and then changing the flow that ram pump exports water, makes the pressure of pressure vessel follow setting pressure change in the scope that error allows; Water delivering orifice variable valve is controlled by the controller, for playing pressure regulation in the reservoir pressure decline stage that need test.
Control mode is divided into Non-follow control and automatically controls, and artificially arranging frequency conversion value under manual mode, according to feedback pressure value manual adjustments frequency conversion value, is open loop control mode, is used for sealing better, the hold time shorter test with needing to destroy rapidly; Under automated manner, given hydraulic pressure step value, automatically controls multistage loadings by ANN (Artificial Neural Network) Control module, is closed-loop control, is mainly used in poor sealing, the test that hold time is longer and control accuracy is higher.Actual Stress control curve as shown in Figure 3.
Compared to existing pilot system, this Water hydraulic static pressure loading system being used for slow test adds Siemens MM440 frequency converter in variable-frequency motor point of incoming cables, export analog quantity voltage by siemens PLC CPU and set frequency conversion value, make water intake velocity controlled, broken away from the method with the dynamic ftercompction of wobble pump.And traditional pump motor is replaced by variable-frequency motor, motor speed is more even, and current " stock enters " situation is eased; In inlet pipeline, add triple channel plunger assembly again, not only increase the loading upper limit, prevent from, into water backflow, also making into water flow velocity more even, making to become possibility in the mode of water inlet pipe place setting pressure table.In addition, controller on-load pressure signal as requested and the pressure feedback signal of pressure vessel that need test, automatic adjustment analog quantity AO exports, and then control water intake velocity, error is stabilized in ± scope of %1, meet accuracy requirement preferably, overcome longer to hold time and that pressure controling precision is higher test, the problem of accuracy requirement cannot be reached by the dynamic ftercompction mode of wobble pump.For the problem of motor disorderly closedown because load is excessive, adopt the variable-frequency motor supporting with converter plant, and set frequency conversion output area according to power of motor, efficiently solve the problem of disorderly closedown.In addition for the requirement needing dynamic acquisition pressure data in process of the test, because pressure instrumentation does not have data buffer area, so adopt controller by MODBUS protocol mode and instrument communication, and set up WINCC host computer configuration picture, achieve the Real-time Collection of gauge pressure data and the automatic control of pressure-loaded process.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment when not departing from principle of the present utility model and aim, revising, replacing and modification in scope of the present utility model.
Claims (1)
1. for a Water hydraulic static pressure loading system for slow test, it is characterized in that: comprise controller, frequency converter, variable-frequency motor, ram pump and water delivering orifice variable valve; The on-load pressure signal required and the pressure feedback signal input control device of pressure vessel that need test, controller outputs control signals to frequency converter, frequency converter outputs signal to variable-frequency motor, and variable-frequency motor drives ram pump to the pressure vessel water filling that need test pressurization; Frequency converter, by changing the rotating speed of variable-frequency motor and then changing the flow that ram pump exports water, makes the pressure of pressure vessel follow setting pressure change in the scope that error allows; Water delivering orifice variable valve is controlled by the controller, for playing pressure regulation in the reservoir pressure decline stage that need test.
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| CN201520553532.8U CN204855244U (en) | 2015-07-28 | 2015-07-28 | A water pressure loading system for static test |
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| CN201520553532.8U CN204855244U (en) | 2015-07-28 | 2015-07-28 | A water pressure loading system for static test |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547845A (en) * | 2015-12-22 | 2016-05-04 | 广州特种承压设备检测研究院 | Hydraulic pressure-resistant test method and hydraulic pressure-resistant test device |
| CN106153272A (en) * | 2016-08-25 | 2016-11-23 | 中国十七冶集团有限公司 | A kind of multifunctional pipe valve pressure testing device |
| CN107463195A (en) * | 2017-08-02 | 2017-12-12 | 南阳师范学院 | Plant's environment remote monitoring system based on self-defined web page |
| CN110252194A (en) * | 2019-07-02 | 2019-09-20 | 清远南玻节能新材料有限公司 | Liquid injection system and mixing arrangement |
-
2015
- 2015-07-28 CN CN201520553532.8U patent/CN204855244U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547845A (en) * | 2015-12-22 | 2016-05-04 | 广州特种承压设备检测研究院 | Hydraulic pressure-resistant test method and hydraulic pressure-resistant test device |
| CN106153272A (en) * | 2016-08-25 | 2016-11-23 | 中国十七冶集团有限公司 | A kind of multifunctional pipe valve pressure testing device |
| CN107463195A (en) * | 2017-08-02 | 2017-12-12 | 南阳师范学院 | Plant's environment remote monitoring system based on self-defined web page |
| CN107463195B (en) * | 2017-08-02 | 2023-08-15 | 南阳师范学院 | Farm environment remote monitoring system based on custom web page |
| CN110252194A (en) * | 2019-07-02 | 2019-09-20 | 清远南玻节能新材料有限公司 | Liquid injection system and mixing arrangement |
| CN110252194B (en) * | 2019-07-02 | 2022-06-10 | 清远南玻节能新材料有限公司 | Liquid injection system and mixing device |
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