CN110242591A - A kind of pump valve interlock method that High head Pumping Station is controlled based on PLC - Google Patents
A kind of pump valve interlock method that High head Pumping Station is controlled based on PLC Download PDFInfo
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- CN110242591A CN110242591A CN201910700912.2A CN201910700912A CN110242591A CN 110242591 A CN110242591 A CN 110242591A CN 201910700912 A CN201910700912 A CN 201910700912A CN 110242591 A CN110242591 A CN 110242591A
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- 238000000034 method Methods 0.000 title claims abstract description 116
- 238000005086 pumping Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Programmable Controllers (AREA)
Abstract
The present invention relates to High head Pumping Station technical fields; and disclose a kind of pump valve interlock method that High head Pumping Station is controlled based on PLC; including starting procedure, shut down process and accidental shutdown process; motor takes soft starting mode in starting procedure, and flowing water Valve cannot be opened too early when being often in backpressure condition booting；It shuts down in process, behind 75 degree of angles of penstock quick closedown, shuts down；In accidental shutdown process, judge whether flowing water Valve closes, be such as not turned off, to ensure safety, while ordering to close water-in and water-out valve.The pump valve interlock method that the High head Pumping Station is controlled based on PLC, it ensure that the accuracy operated every time, water hammer boosting is effectively eliminated or reduced, equipment and pipeline safety is ensure that, reduces labor intensity, eliminate the influence of human factor in operation, the generation of personnel casualty accidents in operation is avoided, control implementation procedure is reliable, and order issues quick, operator is reduced, to realize few man on duty, unattended having laid solid foundation.
Description
Technical field
The present invention relates to High head Pumping Station technical field, specially a kind of High head Pumping Station is joined based on the pump valve that PLC is controlled
Dynamic method.
Background technique
The development of science and technology, pumping plant intelligent construction put on history schedule, and target is exactly to closely follow emerging technology
Developing steps, under the premise of reducing energy consumption, Continuous optimization automated system framework continuously improves system function and property
Can, the utilization rate of pumping plant main equipment operational reliability and water is improved, operational support, safety management and emergency respective capabilities are promoted,
Promote pumping plant to integration, intelligent high-efficiency operation and safety management mode transformation.Purpose is exactly to realize " unattended, few people
It is on duty ", sufficiently liberate labour.
The computer monitor system for pump station for carrying out Study of intelligent uses PLC control mode, and PLC control mode function is strong
Greatly, become extremely to be easy by programming the realization for making pump valve link.Pumping plant field device situation is often as follows: 1. motor is high pressure
Asynchronous motor, using soft starting mode；2. water pump is centrifugal pump of horizontal axis；3. flowing water Valve is two stages to close fluid-control valve；
4. unit uses two or three machine parallel running modes.
The mode of operation of traditional host groups and valve is: operations staff is respectively at hyperbaric chamber (or control room) when 1, being switched on
It is operated at flowing water Valve, the latter people's Open valve of people combined floodgate；2, shut down when operations staff respectively hyperbaric chamber (or control
Room processed) and flowing water Valve at operated, a people first closes one people of valve separating brake again.Open, two operations staffs of stopping process are grasping
Make the undesirable with possibility is closed of time, and operates all inconsistent, this very big security risk of presence each time.In addition right
Quantity, the state of mind, the technical level of operator on duty requires all very high.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides the pump valve linkage sides that a kind of High head Pumping Station is controlled based on PLC
Method solves the above problem.
(2) technical solution
The invention provides the following technical scheme: the pump valve interlock method that a kind of High head Pumping Station is controlled based on PLC, including open
Machine process shuts down process and accidental shutdown process, and motor takes soft starting mode in starting procedure, and flowing water Valve is often in back
Pressure condition cannot be opened too early when being switched on；It shuts down in process, behind 75 degree of angles of penstock quick closedown, shuts down；Accidental shutdown stream
Cheng Zhong, judges whether flowing water Valve closes, and is such as not turned off, and to ensure safety, while ordering to close water-in and water-out valve.
Preferably, the starting procedure comprising the following specific steps
The booting of S1 host computer enables；
S2 is the then distant place LCU control, otherwise alarms and exits process；
S3 is then compressor start up condition, otherwise alarms and exits process；
S4 is, soft to open that integrated cabinet is soft to open external control, otherwise alarms and exits process；
S5 is soft to open the order of integrated cabinet soft start；
S6 is, soft to open bypass operation, otherwise alarms and exits process；
S7 is that then a hydraulic butterfly valve distant place controls position, otherwise alarms and exits process；
S8 hydraulic butterfly valve valve opening enables；
S9 is then flow control butterfly valve fully open position, otherwise alarms and exits process；
S10 booting terminates.
Preferably, the shutdown process comprising the following specific steps
S11 host computer, which is shut down, to be enabled；
S12 is the then distant place LCU control, otherwise alarms and exits process；
S13 is that then a hydraulic butterfly valve distant place controls position, otherwise alarms and exits process；
S14 is, soft to open that integrated cabinet is soft to open external control, otherwise alarms and exits process；
S15 hydraulic butterfly valve closes valve and enables；
S16 hydraulic butterfly valve closes 75 degree, otherwise alarms and exits process；
S17 is soft to open the soft cease-and-desist order of integrated cabinet；
S18 is that soft open does not run in bypass, otherwise alarms and exits process；；
S19 liquid butterfly valve closed positions, otherwise alarm and exit process；
S20 booting terminates.
Preferably, the accidental shutdown process the following steps are included:
S21 accidental shutdown process；
S22 is then non-closed state, otherwise alarms and exits process；
S23 is soft, and integrated cabinet cease-and-desist order, the valve order of hydraulic butterfly valve pass and the motor-driven valve of opening close valve and enable.
(3) beneficial effect
Compared with prior art, the present invention provides the pump valve interlock method that a kind of High head Pumping Station is controlled based on PLC, tools
It is standby following the utility model has the advantages that
(1) the pump valve interlock method that the High head Pumping Station is controlled based on PLC ensure that the accuracy operated every time, effectively
Water hammer boosting is eliminated or reduced, ensure that equipment and pipeline safety.
(2) the pump valve interlock method that the High head Pumping Station is controlled based on PLC, reduces labor intensity, eliminates in operation
The influence of human factor avoids the generation of personnel casualty accidents in operation.
(3) the pump valve interlock method that the High head Pumping Station is controlled based on PLC, control implementation procedure is reliable, and order issues fast
It is prompt.
(4) the pump valve interlock method that the High head Pumping Station is controlled based on PLC, reduce operator, for realize few man on duty,
It is unattended to have laid solid foundation.
(5) the pump valve interlock method that the High head Pumping Station is controlled based on PLC, scene need to configure equipment reduction, save money
Gold alleviates maintenance workload.
(6) the pump valve interlock method that the High head Pumping Station is controlled based on PLC, successfully manages accidental shutdown, it is ensured that equipment
Safety.
Detailed description of the invention
Fig. 1 is starting procedure figure of the invention；
Fig. 2 is shutdown flow chart of the invention；
Fig. 3 is accidental shutdown flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-3, a kind of pump valve interlock method that High head Pumping Station is controlled based on PLC, including starting procedure, shutdown
Process and accidental shutdown process, motor takes soft starting mode in starting procedure, and flowing water Valve is often in backpressure condition booting
Shi Buneng is opened too early；It shuts down in process, behind 75 degree of angles of penstock quick closedown, shuts down；In accidental shutdown process, judge
Whether penstock closes, and is such as not turned off, and to ensure safety, while ordering to close water-in and water-out valve.
Further, the starting procedure comprising the following specific steps
The booting of S1 host computer enables；
S2 is the then distant place LCU control, otherwise alarms and exits process；
S3 is then compressor start up condition, otherwise alarms and exits process；
S4 is, soft to open that integrated cabinet is soft to open external control, otherwise alarms and exits process；
S5 is soft to open the order of integrated cabinet soft start；
S6 is, soft to open bypass operation, otherwise alarms and exits process；
S7 is that then a hydraulic butterfly valve distant place controls position, otherwise alarms and exits process；
S8 hydraulic butterfly valve valve opening enables；
S9 is then flow control butterfly valve fully open position, otherwise alarms and exits process；
S10 booting terminates.
Further, the shutdown process comprising the following specific steps
S11 host computer, which is shut down, to be enabled；
S12 is the then distant place LCU control, otherwise alarms and exits process；
S13 is that then a hydraulic butterfly valve distant place controls position, otherwise alarms and exits process；
S14 is, soft to open that integrated cabinet is soft to open external control, otherwise alarms and exits process；
S15 hydraulic butterfly valve closes valve and enables；
S16 hydraulic butterfly valve closes 75 degree, otherwise alarms and exits process；
S17 is soft to open the soft cease-and-desist order of integrated cabinet；
S18 is that soft open does not run in bypass, otherwise alarms and exits process；；
S19 liquid butterfly valve closed positions, otherwise alarm and exit process；
S20 booting terminates.
Further, the accidental shutdown process the following steps are included:
S21 accidental shutdown process；
S22 is then non-closed state, otherwise alarms and exits process；
S23 is soft, and integrated cabinet cease-and-desist order, the valve order of hydraulic butterfly valve pass and the motor-driven valve of opening close valve and enable
Working principle: the pump valve interlock method that the High head Pumping Station is controlled based on PLC when booting, is opened under computer background
Machine enables, and is transmitted to the control of a LCU cabinet distant place and executes order, first judges whether compressor start up condition meets.Compressor start up condition is soft to open integrated height
Pressure cabinet is in distant place control state, and flowing water Valve is in distant place control state.It alerts and moves back if any one condition is unsatisfactory for
Process out prompts operator to carry out inspection processing.Soft the starting of integrated cabinet breaker is opened when the two conditions meet first to close simultaneously
Motor, motor slowly start when reaching rated speed feedback signal to by PLC
, PLC orders to open flowing water Valve, and flowing water Valve, which reaches to be switched on after full-gear, to be terminated.It is specifically shown in Fig. 1 starting procedure
Figure；
It shuts down: shutting down and enable under computer background, be transmitted to the control of a LCU cabinet distant place and execute order, first judge that halt condition is
No satisfaction.Halt condition is that flowing water Valve is in distant place control state, and the soft integrated high-pressure cabinet that opens is in distant place control state.If appointing
Condition of anticipating is unsatisfactory for, and alerts and exit process, and operator is prompted to carry out inspection processing.When the two conditions are full simultaneously
Foot enables and first closes flowing water Valve, gives PLC feedback signal after 75 ° of valve quick closing valve, and PLC orders point soft to open integrated cabinet power failure of breaker
Machine, flowing water Valve enter it is slow close stage slowly closing, flowing water Valve, which is in after full off state to shut down, to be terminated.It is specifically shown in Fig. 2 shutdown
Flow chart.
Accidental shutdown: if computer monitoring backstage obtains unit failure alarm signal, to judge whether in closing
State, closed state, that is, flowing water Valve are in full off state, soft open integrated cabinet breaker and be in gate-dividing state.If the two
Part all meets, and alerts and does not enter accidental shutdown process.If either condition is unsatisfactory for, start accidental shutdown process, PLC is the same as at present
Order point is soft to open integrated cabinet power failure of breaker machine, water-in and water-out valve closing of ordering.It is specifically shown in Fig. 3 accidental shutdown flow chart.Then root
According to the breaker division signal of PLC feedback, water-in and water-out valve closes entirely and angle signal judges equipment state, is further located
Reason,
In conclusion the pump valve interlock method that the High head Pumping Station is controlled based on PLC, ensure that operate every time it is accurate
Property, water hammer boosting is effectively eliminated or reduced, ensure that equipment and pipeline safety.
The pump valve interlock method that the High head Pumping Station is controlled based on PLC, reduces labor intensity, eliminates artificial in operation
The influence of factor avoids the generation of personnel casualty accidents in operation.
The pump valve interlock method that the High head Pumping Station is controlled based on PLC, control implementation procedure is reliable, and order issues quick.
The pump valve interlock method that the High head Pumping Station is controlled based on PLC reduces operator, to realize few man on duty, nothing
People is on duty to have laid solid foundation.
The pump valve interlock method that the High head Pumping Station is controlled based on PLC, scene need to configure equipment reduction, save fund,
Alleviate maintenance workload.
The pump valve interlock method that the High head Pumping Station is controlled based on PLC, successfully manages accidental shutdown, it is ensured that equipment peace
Entirely.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. the pump valve interlock method that a kind of High head Pumping Station is controlled based on PLC, it is characterised in that: including starting procedure, shut down stream
Journey and accidental shutdown process, motor takes soft starting mode in starting procedure, when flowing water Valve is often in backpressure condition booting
It cannot open too early；It shuts down in process, behind 75 degree of angles of penstock quick closedown, shuts down；In accidental shutdown process, judge to be discharged
Whether valve closes, and is such as not turned off, and to ensure safety, while ordering to close water-in and water-out valve.
2. the pump valve interlock method that a kind of High head Pumping Station according to claim 1 is controlled based on PLC, which is characterized in that
The starting procedure comprising the following specific steps
The booting of S1 host computer enables；
S2 is the then distant place LCU control, otherwise alarms and exits process；
S3 is then compressor start up condition, otherwise alarms and exits process；
S4 is, soft to open that integrated cabinet is soft to open external control, otherwise alarms and exits process；
S5 is soft to open the order of integrated cabinet soft start；
S6 is, soft to open bypass operation, otherwise alarms and exits process；
S7 is that then a hydraulic butterfly valve distant place controls position, otherwise alarms and exits process；
S8 hydraulic butterfly valve valve opening enables；
S9 is then flow control butterfly valve fully open position, otherwise alarms and exits process；
S10 booting terminates.
3. the pump valve interlock method that a kind of High head Pumping Station according to claim 1 is controlled based on PLC, which is characterized in that
The shutdown process comprising the following specific steps
S11 host computer, which is shut down, to be enabled；
S12 is the then distant place LCU control, otherwise alarms and exits process；
S13 is that then a hydraulic butterfly valve distant place controls position, otherwise alarms and exits process；
S14 is, soft to open that integrated cabinet is soft to open external control, otherwise alarms and exits process；
S15 hydraulic butterfly valve closes valve and enables；
S16 hydraulic butterfly valve closes 75 degree, otherwise alarms and exits process；
S17 is soft to open the soft cease-and-desist order of integrated cabinet；
S18 is that soft open does not run in bypass, otherwise alarms and exits process；；
S19 liquid butterfly valve closed positions, otherwise alarm and exit process；
S20 booting terminates.
4. the pump valve interlock method that a kind of High head Pumping Station according to claim 1 is controlled based on PLC, which is characterized in that
The accidental shutdown process the following steps are included:
S21 accidental shutdown process；
S22 is then non-closed state, otherwise alarms and exits process；
S23 is soft, and integrated cabinet cease-and-desist order, the valve order of hydraulic butterfly valve pass and the motor-driven valve of opening close valve and enable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700912.2A CN110242591A (en) | 2019-07-31 | 2019-07-31 | A kind of pump valve interlock method that High head Pumping Station is controlled based on PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700912.2A CN110242591A (en) | 2019-07-31 | 2019-07-31 | A kind of pump valve interlock method that High head Pumping Station is controlled based on PLC |
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| CN110242591A true CN110242591A (en) | 2019-09-17 |
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| CN201910700912.2A Pending CN110242591A (en) | 2019-07-31 | 2019-07-31 | A kind of pump valve interlock method that High head Pumping Station is controlled based on PLC |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196783A (en) * | 2020-10-15 | 2021-01-08 | 云南大红山管道有限公司 | Automatic control starting method for pump set of long-distance large-pipe-diameter water delivery and transfer pump station |
| CN115405512A (en) * | 2022-08-16 | 2022-11-29 | 云南大红山管道有限公司 | Multiple water hammer hazard protection device and control method for high-lift water lifting equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4078196A (en) * | 1976-03-01 | 1978-03-07 | Vapor Corporation | Digital valve and pump control system |
| JP2000265966A (en) * | 1999-03-12 | 2000-09-26 | Daikin Ind Ltd | Inverter driven hydraulic unit |
| CN201809806U (en) * | 2010-10-13 | 2011-04-27 | 济南水业集团有限责任公司 | Linked variable-frequency constant-pressure water supply system of pump valve |
| CN204140352U (en) * | 2014-08-07 | 2015-02-04 | 江苏河海电气有限公司 | A kind of dry-type centrifugal pump pump valve linkage control device |
| CN206458583U (en) * | 2017-01-23 | 2017-09-01 | 云南大红山管道有限公司 | One kind linkage startup-shutdown control device |
| CN108223400A (en) * | 2017-12-30 | 2018-06-29 | 安徽省水利水电勘测设计院 | A kind of pump valve linkage computer control method applied to pressure box culvert water delivery |
-
2019
- 2019-07-31 CN CN201910700912.2A patent/CN110242591A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4078196A (en) * | 1976-03-01 | 1978-03-07 | Vapor Corporation | Digital valve and pump control system |
| JP2000265966A (en) * | 1999-03-12 | 2000-09-26 | Daikin Ind Ltd | Inverter driven hydraulic unit |
| CN201809806U (en) * | 2010-10-13 | 2011-04-27 | 济南水业集团有限责任公司 | Linked variable-frequency constant-pressure water supply system of pump valve |
| CN204140352U (en) * | 2014-08-07 | 2015-02-04 | 江苏河海电气有限公司 | A kind of dry-type centrifugal pump pump valve linkage control device |
| CN206458583U (en) * | 2017-01-23 | 2017-09-01 | 云南大红山管道有限公司 | One kind linkage startup-shutdown control device |
| CN108223400A (en) * | 2017-12-30 | 2018-06-29 | 安徽省水利水电勘测设计院 | A kind of pump valve linkage computer control method applied to pressure box culvert water delivery |
Non-Patent Citations (2)
| Title |
|---|
| 李丰进: ""景电工程泵站多台出水液控蝶阀的集中控制及其自动化改进"", 《甘肃水利水电技术》 * |
| 陈德全等: ""金鸡岩泵站泵与泵阀联动控制的开停机流程设计"", 《四川水利》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196783A (en) * | 2020-10-15 | 2021-01-08 | 云南大红山管道有限公司 | Automatic control starting method for pump set of long-distance large-pipe-diameter water delivery and transfer pump station |
| CN112196783B (en) * | 2020-10-15 | 2022-05-24 | 云南大红山管道有限公司 | Automatic control starting method for pump set of long-distance large-pipe-diameter water conveying and transferring pump station |
| CN115405512A (en) * | 2022-08-16 | 2022-11-29 | 云南大红山管道有限公司 | Multiple water hammer hazard protection device and control method for high-lift water lifting equipment |
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