CN205638880U - Closed level four connection in series -parallel pump station system - Google Patents
Closed level four connection in series -parallel pump station system Download PDFInfo
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- CN205638880U CN205638880U CN201620476390.4U CN201620476390U CN205638880U CN 205638880 U CN205638880 U CN 205638880U CN 201620476390 U CN201620476390 U CN 201620476390U CN 205638880 U CN205638880 U CN 205638880U
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Abstract
The utility model discloses a closed level four connection in series -parallel pump station system, this closed level four connection in series -parallel pump station system, including one -level pump station, second grade pump station, tertiary pump station, level four pump station, one -level pump station, second grade pump station, tertiary pump station, level four pump station are established ties together, and every grade of pump station is equipped with many water pump assembly parallel operation, the control method of this system includes at least: open pump dispatching method, termination of pumping dispatching method, trouble dispatching method, the constant voltage control method. The utility model discloses for there being the intake pool before the current pump station, the pump station end has an outlet water pool water supply scheme, the utility model discloses need not to build the equalizing basin, take up an area of little, the investment little, practice thrift engineering cost greatly.
Description
Technical field
This case utility model relates to hydraulic engineering field, particularly relates to a kind of closed level Four connection in series-parallel pumping station system.
Background technology
When the distance water supply project of current domestic large pumping station uses multi stage pumping station to pump up water, intake pool is had before all using pumping plant, pumping plant end has discharge bay, and both the discharge bay of previous stage pumping plant was exactly the forebay of next stage pumping plant, carries out Flow-rate adjustment by intake pool or discharge bay.The capacity that so certainly will cause regulating reservoir is very big, is on a grand scale, and occupation of land is many, and investment is big.Problem in view of above-mentioned existence, advance in view of current automatic control level, proposing a kind of closed level Four connection in series-parallel pumping plant joint control joint debugging pipeline constant voltage Automatic dispatching operating scheme, this regulation and operation scheme is in Tengzhou City, Shandong Province safe operation six months.
Utility model content
The purpose of this utility model is to provide a kind of closed level Four connection in series-parallel pumping station system and control method thereof, to solve above-mentioned technical problem.
This utility model is by the following technical solutions for achieving the above object:
A kind of closed level Four connection in series-parallel pumping station system, including one-level pumping plant, secondary pumping station, three stage pump station, level Four pumping plant, described one-level pumping plant, secondary pumping station, three stage pump station, level Four pumping plant are cascaded, and every grade of pumping plant is provided with multiple stage water pump assembly parallel running.
Preferably, it is respectively provided with water-level gauge and effusion meter before and after every grade of pumping plant.
Preferably, it is respectively provided with pressure transducer before and after the group of every water pump assembly.
Preferably, one-level pumping plant is connected with water head site, and water head site is provided with Water level automatic controlling sluice gate, and Water level automatic controlling sluice gate is used for according to water auto-regulation inflow size, and sends water level, Hydrologic Information.
A kind of closed level Four connection in series-parallel pumping plant system control method, control method at least includes: open pump dispatching method；Termination of pumping dispatching method；Fault dispatching method；Constant pressure control method.
The described pump dispatching method that opens comprises the steps:
1), preparation start-up command is assigned by control centre；
2), pumping plant at different levels will receive start-up prompting sound, wait that pumping plant signal at different levels feeds back；After needing pumping plant hand inspection pump front pumps at different levels, whether service valve is opened, whether is had staff at repair apparatus, if conditions above all possesses, pumping plant staff has feedback signal, control centre to possess compressor start up condition to one, control centre feedback signal, level Four pumping plant；
3), control centre set pressure after 4 pumping plant pumps and assign start-up command, first start 1 grade of pumping plant frequency converter sets；One-level pumping plant frequency converter sets starts, and PLC program detects the pump condition that opens automatically:
The water level of the frontal pool > minimum start water level；Vacuum pump remote status；Hydrauliccontrol non-return valve remote status；Incoming line switch cabinet closing position；Variable-frequency electric rack remote status；Converter is in ready state, does not has fault to believe；Motor temperature without transfiniting, high-voltage motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, high-voltage motor: stator temperature alarming value: 125 DEG C, shutdown value: 130 DEG C；
4), starting vacuum extractor, evacuation completes, and return evacuation completes signal vacuum extractor and is automatically switched off；
5), starting converter, converter runs with 50HZ, detects converting operation signal, it is stipulated that the time is not detected by run signal, reports fault, stops converter；
6), pressure difference value reaches setting value 0.24MPa before and after pump, opens hydrauliccontrol non-return valve, and detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, reporting fault, stopping valve opening, and valve uniformly should be opened in 60s；
7), 1 grade of pumping plant start to 2 grades of pumping plant water-fillings, secondary pumping station frequency converter sets starts, and PLC program detects the pump condition that opens automatically: 1. pressure before pump > start pressure 0.15MPa；2. hydrauliccontrol non-return valve remote status；3.0.4kV incoming line switch cabinet closing position；4.0.4kV variable-frequency electric rack remote status；5. converter is in ready state, does not has fault-signal；6. motor temperature is without transfiniting, motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, motor: stator temperature alarming value: 135 DEG C, shutdown value: 145 DEG C；
8), detecting according to actual run time, start converter after 30S, converter runs with 50HZ, detects converting operation signal, it is stipulated that the time is not detected by run signal, reports fault, stops converter；
9), pressure difference value reaches 0.20MPa before and after pump, opens hydrauliccontrol non-return valve, and detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, reporting fault, stopping valve opening, and valve uniformly should be opened in 60s；
10), 2 grades of pumping plants start to 3 grades of pumping plant water-fillings, three stage pump station frequency converter sets starts, and PLC program detects the pump condition that opens automatically: pressure before pump > start pressure 0.15MPa；Hydrauliccontrol non-return valve remote status；Incoming line switch cabinet closing position；Variable-frequency electric rack remote status；Converter is in ready state, does not has fault-signal；Motor temperature without transfiniting, motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, motor: stator temperature alarming value: 125 DEG C, shutdown value: 130 DEG C；
11), force value reaches setting value 0.40MPa before and after pump, opens hydrauliccontrol non-return valve, and detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, reporting fault, stopping valve opening, and valve uniformly should be opened in 80s；
12), 3 grades of pumping plants start to 4 grades of pumping plant water-fillings, level Four pumping plant frequency converter sets starts, and PLC program detects the pump condition that opens automatically: pressure before pump > start pressure 0.15MPa；Hydrauliccontrol non-return valve remote status；Incoming line switch cabinet closing position；Variable-frequency electric rack remote status；Converter is in ready state, does not has fault-signal；Motor temperature without transfiniting, motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, motor: stator temperature alarming value: 125 DEG C, shutdown value: 130 DEG C；
13), detecting according to actual run time, start converter after 60S, converter runs with 50HZ, detects converting operation signal, it is stipulated that the time is not detected by run signal, reports fault, stops converter；
14), before and after pump, force value reaches setting value 0.40MPa, open hydrauliccontrol non-return valve, detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, report fault, stops valve opening, and valve uniformly should be opened in 100s, 4 grades of pumping plants start to by waterpipe water-filling, and water-filling flow process completes.
Described termination of pumping dispatching method comprises the steps: that level Four pumping plant is shut down; start to shut down from final stage pumping plant; i.e. level Four pumping plant elder generation dead halt, three stage pump station shutdown, secondary pumping station is shut down; one-level pumping plant is finally shut down; water pump assembly in every grade of pumping plant is shut down, and first stops a water pump assembly, and First water pump assembly turns off second water pump assembly after completing to shut down; and first stop work frequency motor, after stop frequency conversion motor.
Separate unit water pump assembly closing method: halt instruction is assigned by control centre；Close hydrauliccontrol non-return valve after pump, one-level pumping plant valve is uniformly closed in 60s, secondary pumping station valve is uniformly closed in 60s, three stage pump station valve is uniformly closed in 80s, level Four pumping plant valve is uniformly closed in 150s, during valve closing, if water pump assembly frequency variable synchronous is downconverted to allow low-limit frequency；Hydrauliccontrol non-return valve closes to put in place and is not detected by pass in the stipulated time and puts in place signal, reports fault；Stopping water pump assembly, motor cabinet open position, without motor operation signal, separate unit water pump assembly completely closes.
Fault dispatching method comprises the steps: separate unit water pump assembly accidental shutdown, and after pump, pilot operated valve device enters entrance accident and closes valve flow process, closes slowly, wherein after first quick closing valve:
A. one-level pumping plant closing valve time 60s,
10s 0%～80%,
50s 80%～100%；
B. secondary pumping station closing valve time 60s,
10s 0%～80%,
50s 80%～100%；
C. three stage pump station closing valve time 80s,
10s 0%～80%,
70s 80%～100%；
D. level Four pumping plant closing valve time 150s,
10s 0%～80%,
140s 80%～100%；
Separate unit water pump assembly dead electricity, this unit enters accidental shutdown flow process, starts other 1 unit in this station simultaneously, and remaining unit of our station, remaining pumping plant unit are properly functioning；Two grades, three grades, time pressure is less than 0.02MPa before the station of level Four pumping plant, and continues this pumping plant unit of more than 15s and fully enter accidental shutdown flow process；Level Four pumping plant is stood dead electricity entirely, and all units of pumping plant enter accidental shutdown flow process；One, two, three pumping plant is properly functioning；Three stage pump station is stood dead electricity entirely, three grades, all units of level Four pumping plant enter accidental shutdown flow process, I and II pumping plant is properly functioning；Secondary pumping station is stood dead electricity entirely, two, three, all units of level Four pumping plant enter accidental shutdown flow process, one-level pumping plant is properly functioning；One-level pumping plant is stood dead electricity entirely, and all units of joint control pumping plant enter accidental shutdown flow process completely.
Constant pressure control method, one-level, two grades, three grades, level Four pumping plant realize Isobarically Control by the pressure after monitoring pump, one-level, two grades, three grades, after level Four pumping plant pump main pipeline constant voltage numerical range be respectively as follows: 0.22MPa(0.21～0.25MPa), 0.27MPa(0.26～0.31MPa), 0.32MPa(0.31～0.36MPa), 0.40MPa(0.39～0.44MPa)；For keeping constant voltage, preferentially realized by the lifting frequency of frequency converter sets, when frequency converter sets lifting frequency still reaches to less than range of set value, take many open and close unit to realize；The concrete control method taking many open and close unit to realize is: pressure value after monitoring pump, when after pump, numerical value runs more than range of set value, variable frequency pump unit frequency reducing, after unit is down to certain frequency, if reaching the numerical range set, then keep this frequency constant, otherwise continue frequency reducing, until being down to the lower-frequency limit value allowed, if frequency converter sets is run by the lower-frequency limit value allowed, after pump, pressure is still less than range of set value, then close a unit, the like, realize constant voltage by closing unit；When after pump, numerical value is less than range of set value, variable frequency pump unit raising frequency runs, after unit rises to certain frequency, if reaching the numerical range set, then keep this frequency constant, otherwise continue to rise, until rising to 50HZ power frequency operation, if frequency converter sets power frequency operation, after pump, pressure is still less than range of set value, then open a unit, the like, realize constant voltage by many starts group.
The beneficial effects of the utility model are: all of scheduling of this utility model every grade pumping plant, pipeline pressure control, operation all can have been hit at industrial computer end points, can realize supplying water completely scheduling according to operating scheme, the optimized operation scheme under difference operating mode can be realized by 4 key pressure values of amendment Isobarically Control；Relative to having intake pool, pumping plant end to have discharge bay water supply scheme before existing pumping plant, this utility model without building regulating reservoir, take up an area little, invest little, be greatly saved engineering cost.
Accompanying drawing explanation
Fig. 1 is this utility model closed level Four connection in series-parallel pumping plant system construction drawing；
In figure: 1, one-level pumping plant, 2, secondary pumping station, 3, three stage pump station, 4, level Four pumping plant, 5, water pump assembly.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.
As shown in Figure 1, a kind of closed level Four connection in series-parallel pumping station system, including one-level pumping plant 1, secondary pumping station 2, three stage pump station 3, level Four pumping plant 4, described one-level pumping plant 1, secondary pumping station 2, three stage pump station 3, level Four pumping plant 4 is cascaded, every grade of pumping plant is provided with multiple stage water pump assembly 5 parallel running, water-level gauge and effusion meter it is respectively provided with before and after every grade of pumping plant, it is respectively provided with pressure transducer before and after the group of every water pump assembly, one-level pumping plant is connected with water head site, water head site is provided with Water level automatic controlling sluice gate, Water level automatic controlling sluice gate is for according to water auto-regulation inflow size, and send water level, Hydrologic Information.
This utility model additionally provides this closed level Four connection in series-parallel pumping plant system control method, and control method at least includes: open pump dispatching method；Termination of pumping dispatching method；Fault dispatching method；Constant pressure control method.
The described pump dispatching method that opens comprises the steps:
1), preparation start-up command is assigned by control centre；
2), pumping plant at different levels will receive start-up prompting sound, wait that pumping plant signal at different levels feeds back；After needing pumping plant hand inspection pump front pumps at different levels, whether service valve is opened, whether is had staff at repair apparatus, if conditions above all possesses, pumping plant staff has feedback signal, control centre to possess compressor start up condition to one, control centre feedback signal, level Four pumping plant；
3), control centre set pressure after 4 pumping plant pumps and assign start-up command, first start 1 grade of pumping plant frequency converter sets；One-level pumping plant frequency converter sets starts, and PLC program detects the pump condition that opens automatically:
The water level of the frontal pool > minimum start water level；Vacuum pump remote status；Hydrauliccontrol non-return valve remote status；Incoming line switch cabinet closing position；Variable-frequency electric rack remote status；Converter is in ready state, does not has fault to believe；Motor temperature without transfiniting, high-voltage motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, high-voltage motor: stator temperature alarming value: 125 DEG C, shutdown value: 130 DEG C；
4), starting vacuum extractor, evacuation completes, and return evacuation completes signal vacuum extractor and is automatically switched off；
5), starting converter, converter runs with 50HZ, detects converting operation signal, it is stipulated that the time is not detected by run signal, reports fault, stops converter；
6), pressure difference value reaches setting value 0.24MPa before and after pump, opens hydrauliccontrol non-return valve, and detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, reporting fault, stopping valve opening, and valve uniformly should be opened in 60s；
7), 1 grade of pumping plant start to 2 grades of pumping plant water-fillings, secondary pumping station frequency converter sets starts, and PLC program detects the pump condition that opens automatically: 1. pressure before pump > start pressure 0.15MPa；2. hydrauliccontrol non-return valve remote status；3.0.4kV incoming line switch cabinet closing position；4.0.4kV variable-frequency electric rack remote status；5. converter is in ready state, does not has fault-signal；6. motor temperature is without transfiniting, motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, motor: stator temperature alarming value: 135 DEG C, shutdown value: 145 DEG C；
8), detecting according to actual run time, start converter after 30S, converter runs with 50HZ, detects converting operation signal, it is stipulated that the time is not detected by run signal, reports fault, stops converter；
9), pressure difference value reaches 0.20MPa before and after pump, opens hydrauliccontrol non-return valve, and detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, reporting fault, stopping valve opening, and valve uniformly should be opened in 60s；
10), 2 grades of pumping plants start to 3 grades of pumping plant water-fillings, three stage pump station frequency converter sets starts, and PLC program detects the pump condition that opens automatically: pressure before pump > start pressure 0.15MPa；Hydrauliccontrol non-return valve remote status；Incoming line switch cabinet closing position；Variable-frequency electric rack remote status；Converter is in ready state, does not has fault-signal；Motor temperature without transfiniting, motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, motor: stator temperature alarming value: 125 DEG C, shutdown value: 130 DEG C；
11), force value reaches setting value 0.40MPa before and after pump, opens hydrauliccontrol non-return valve, and detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, reporting fault, stopping valve opening, and valve uniformly should be opened in 80s；
12), 3 grades of pumping plants start to 4 grades of pumping plant water-fillings, level Four pumping plant frequency converter sets starts, and PLC program detects the pump condition that opens automatically: pressure before pump > start pressure 0.15MPa；Hydrauliccontrol non-return valve remote status；Incoming line switch cabinet closing position；Variable-frequency electric rack remote status；Converter is in ready state, does not has fault-signal；Motor temperature without transfiniting, motor: bearing temperature alarming value: 85 DEG C, shutdown value: 95 DEG C, motor: stator temperature alarming value: 125 DEG C, shutdown value: 130 DEG C；
13), detecting according to actual run time, start converter after 60S, converter runs with 50HZ, detects converting operation signal, it is stipulated that the time is not detected by run signal, reports fault, stops converter；
14), before and after pump, force value reaches setting value 0.40MPa, open hydrauliccontrol non-return valve, detection hydrauliccontrol non-return valve reaches a signal, if being not detected by reaching a signal in setting duration of valve opening, report fault, stops valve opening, and valve uniformly should be opened in 100s, 4 grades of pumping plants start to by waterpipe water-filling, and water-filling flow process completes.
Described termination of pumping dispatching method comprises the steps: that level Four pumping plant is shut down; start to shut down from final stage pumping plant; i.e. level Four pumping plant elder generation dead halt, three stage pump station shutdown, secondary pumping station is shut down; one-level pumping plant is finally shut down; water pump assembly in every grade of pumping plant is shut down, and first stops a water pump assembly, and First water pump assembly turns off second water pump assembly after completing to shut down; and first stop work frequency motor, after stop frequency conversion motor.
Separate unit water pump assembly closing method: halt instruction is assigned by control centre；Close hydrauliccontrol non-return valve after pump, one-level pumping plant valve is uniformly closed in 60s, secondary pumping station valve is uniformly closed in 60s, three stage pump station valve is uniformly closed in 80s, level Four pumping plant valve is uniformly closed in 150s, during valve closing, if water pump assembly frequency variable synchronous is downconverted to allow low-limit frequency；Hydrauliccontrol non-return valve closes to put in place and is not detected by pass in the stipulated time and puts in place signal, reports fault；Stopping water pump assembly, motor cabinet open position, without motor operation signal, separate unit water pump assembly completely closes.
Fault dispatching method comprises the steps: separate unit water pump assembly accidental shutdown, and after pump, pilot operated valve device enters entrance accident and closes valve flow process, closes slowly, wherein after first quick closing valve:
A. one-level pumping plant closing valve time 60s,
10s 0%～80%,
50s 80%～100%；
B. secondary pumping station closing valve time 60s,
10s 0%～80%,
50s 80%～100%；
C. three stage pump station closing valve time 80s,
10s 0%～80%,
70s 80%～100%；
D. level Four pumping plant closing valve time 150s,
10s 0%～80%,
140s 80%～100%；
Separate unit water pump assembly dead electricity, this unit enters accidental shutdown flow process, starts other 1 unit in this station simultaneously, and remaining unit of our station, remaining pumping plant unit are properly functioning；Two grades, three grades, time pressure is less than 0.02MPa before the station of level Four pumping plant, and continues this pumping plant unit of more than 15s and fully enter accidental shutdown flow process；Level Four pumping plant is stood dead electricity entirely, and all units of pumping plant enter accidental shutdown flow process；One, two, three pumping plant is properly functioning；Three stage pump station is stood dead electricity entirely, three grades, all units of level Four pumping plant enter accidental shutdown flow process, I and II pumping plant is properly functioning；Secondary pumping station is stood dead electricity entirely, two, three, all units of level Four pumping plant enter accidental shutdown flow process, one-level pumping plant is properly functioning；One-level pumping plant is stood dead electricity entirely, and all units of joint control pumping plant enter accidental shutdown flow process completely.
Constant pressure control method, one-level, two grades, three grades, level Four pumping plant realize Isobarically Control by the pressure after monitoring pump, one-level, two grades, three grades, after level Four pumping plant pump main pipeline constant voltage numerical range be respectively as follows: 0.22MPa(0.21～0.25MPa), 0.27MPa(0.26～0.31MPa), 0.32MPa(0.31～0.36MPa), 0.40MPa(0.39～0.44MPa)；For keeping constant voltage, preferentially realized by the lifting frequency of frequency converter sets, when frequency converter sets lifting frequency still reaches to less than range of set value, take many open and close unit to realize；The concrete control method taking many open and close unit to realize is: pressure value after monitoring pump, when after pump, numerical value runs more than range of set value, variable frequency pump unit frequency reducing, after unit is down to certain frequency, if reaching the numerical range set, then keep this frequency constant, otherwise continue frequency reducing, until being down to the lower-frequency limit value allowed, if frequency converter sets is run by the lower-frequency limit value allowed, after pump, pressure is still less than range of set value, then close a unit, the like, realize constant voltage by closing unit；When after pump, numerical value is less than range of set value, variable frequency pump unit raising frequency runs, after unit rises to certain frequency, if reaching the numerical range set, then keep this frequency constant, otherwise continue to rise, until rising to 50HZ power frequency operation, if frequency converter sets power frequency operation, after pump, pressure is still less than range of set value, then open a unit, the like, realize constant voltage by many starts group.
The above; it is only this utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should contain within protection domain of the present utility model.
Claims (4)
1. a closed level Four connection in series-parallel pumping station system, it is characterised in that include that one-level pumping plant, secondary pumping station, three stage pump station, level Four pumping plant, described one-level pumping plant, secondary pumping station, three stage pump station, level Four pumping plant are cascaded,
Every grade of pumping plant is provided with multiple stage water pump assembly parallel running.
Closed level Four connection in series-parallel pumping station system the most as claimed in claim 1, it is characterised in that be respectively provided with water-level gauge and effusion meter before and after every grade of pumping plant.
Closed level Four connection in series-parallel pumping station system the most as claimed in claim 2, it is characterised in that be respectively provided with pressure transducer before and after the group of every water pump assembly.
Closed level Four connection in series-parallel pumping station system the most as claimed in claim 3, it is characterized in that, one-level pumping plant is connected with water head site, and water head site is provided with Water level automatic controlling sluice gate, Water level automatic controlling sluice gate is used for according to water auto-regulation inflow size, and sends water level, Hydrologic Information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620476390.4U CN205638880U (en) | 2016-05-24 | 2016-05-24 | Closed level four connection in series -parallel pump station system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620476390.4U CN205638880U (en) | 2016-05-24 | 2016-05-24 | Closed level four connection in series -parallel pump station system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205638880U true CN205638880U (en) | 2016-10-12 |
Family
ID=57055597
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620476390.4U Expired - Fee Related CN205638880U (en) | 2016-05-24 | 2016-05-24 | Closed level four connection in series -parallel pump station system |
Country Status (1)
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| CN (1) | CN205638880U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840480A (en) * | 2016-05-24 | 2016-08-10 | 史仁朋 | Closed type four-stage series-parallel connection pump station system and control method thereof |
| CN109440874A (en) * | 2018-11-21 | 2019-03-08 | 华北水利水电大学 | A kind of cascade pumping station tune pond system based on water balance |
-
2016
- 2016-05-24 CN CN201620476390.4U patent/CN205638880U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840480A (en) * | 2016-05-24 | 2016-08-10 | 史仁朋 | Closed type four-stage series-parallel connection pump station system and control method thereof |
| CN109440874A (en) * | 2018-11-21 | 2019-03-08 | 华北水利水电大学 | A kind of cascade pumping station tune pond system based on water balance |
| CN109440874B (en) * | 2018-11-21 | 2021-06-04 | 华北水利水电大学 | Step pump station regulation pond system based on water balance |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170524 |