CN204126913U - Suction engine automatic control system - Google Patents
Suction engine automatic control system Download PDFInfo
- Publication number
- CN204126913U CN204126913U CN201420598183.7U CN201420598183U CN204126913U CN 204126913 U CN204126913 U CN 204126913U CN 201420598183 U CN201420598183 U CN 201420598183U CN 204126913 U CN204126913 U CN 204126913U
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- water pump
- signal
- liquid level
- module
- plc
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000005259 measurement Methods 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses a kind of suction engine automatic control system, comprise water pump and starting or stopping control circuit thereof, PLC, liquid level sensor, pressure transducer, current transducer, wherein PLC is the core of this automatic control system, gather water pump operation state signal, control the start and stop of water pump simultaneously, gather liquid level signal, water pump discharge pressure signal, water pump operation current signal, PLC control program is using water pump operation state signal as primary condition, pass through liquid level signal, water pump discharge pressure signal, these three Rule of judgment of water pump operation current signal control the start and stop of water pump.Judge whether water is drained by these three decision conditions comprehensive, realize water pump safety and stability and run continuously, even if certain sensor experiences failure, system provides malfunction alarm, but influential system does not normally run, and adopts redundant PLC and spare module, add the reliability of system, stability.
Description
Technical field
The utility model relates to a kind of suction engine automatic control system, belongs to technical field of drainage.
Background technique
Due to electric power system power transmission line construction path length, complicated topographical conditions, foundation construction runs into the severe geological condition such as puddle, muddy water hole often, all needs to take drainage measure when excavation of foundation pit, formwork, basis are built.Current drainage measure mainly contains interior row and outer row two kinds of methods, and interior row's method is only applicable to the geological condition that soil condition well not easily caves in; Outer row's method is severe at soil condition, and in the insurmountable situation of interior row's method, utilizes the draining well arranged around foundation ditch to carry out outer draining.
During outer draining, the suction engine in draining well must uninterruptedly draw water for 24 hours, under the effect that suction pump draws water simultaneously around, water level below foundation pit is declined rapidly, allows the of short duration vacancy of water level below foundation ditch, makes to form spill water level below foundation ditch.When being greater than the water yield in well when suction engine water-outlet quantity, because workmen cannot intuitively grasp water level conditions in draining well, need stop pumping without during water burst or when water burst is not enough.If water pump continues unloaded operation, water pump can be caused to damage, (there is no the Cooling and Lubricator of water, burning of water pump packing circle and axle sleeve can be caused, also can cause impeller ring locking, cause motor rotation blockage to burn.) now need staff's hard stop.If stop time is oversize, underground water under the effect of osmotic pressure, can be supplemented to rapidly within the scope of foundation ditch, makes work above become idle work.This just needs staff must start pumping equipment in certain hour after a shutdown.Start and stop so repeatedly virtually increase intensity of workers, waste energy, and also easily damage equipment.If stagnation period is long, then greatly can reduce working efficiency.
At present, market has much for the control system of water pump, but its ubiquity detects not comprehensive, the shortcomings such as control mode is complicated.
Model utility content
The utility model technical issues that need to address are to provide a kind of sensed water level, automatically controlled water pump start and stop automatically, and water pump can not dry tap, without the need to the suction engine automatic control system that workman checks constantly.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is:
A kind of suction engine automatic control system, comprise water pump and starting or stopping control circuit thereof, PLC, liquid level sensor, pressure transducer, current transducer, wherein PLC is the core of this automatic control system, it is by power module, CPU module, number connect test module and Analog input mModule composition, power module is all module for power supply, CPU module is connected with number connect test module and Analog input mModule by datawire, by number connect test module acquires water pump operation state signal, control the start and stop of water pump simultaneously, liquid level signal is gathered by Analog input mModule, water pump discharge pressure signal, water pump operation current signal, PLC control program is using water pump operation state signal as primary condition, pass through liquid level signal, water pump discharge pressure signal, these three Rule of judgment of water pump operation current signal control the start and stop of water pump, when water pump operation, the signal collected and setup parameter are compared, be basic Rule of judgment with liquid level signal, comprehensive descision is carried out in conjunction with pressure signal and current signal.
In order to ensure the reliable of system, described liquid level sensor adopts high-accuracy analog sensor, and it is 4 ~ 20ma current signal that this sensor exports, and can carry out continuous measurement to liquid level, control accuracy is high, and Installation and Debugging are convenient.
In order to ensure the reliable and stable of system, the CPU module in described PLC adopts the CPU module with redundancy feature, and Analog input mModule is configured to the using and the reserved.After the host CPU of CPU module breaks down, spare CPU is run, and ensures reliability and the work continuity of system.
In order to ensure the cost performance of system, the normal operations such as this control system parameters input amendment adopt simple man-machine interface, and man-machine interface is connected with CPU module by Profibus-DP bus.
Owing to have employed technique scheme, the technological progress that the utility model obtains is:
The utility model is on the basis of existing level sensing, increase water pump discharge pressure to detect and water pump operation current detecting, judge whether water is drained by these three decision conditions comprehensive, realize water pump safety and stability to run continuously, even if certain sensor experiences failure, system provides malfunction alarm, but influential system does not normally run, adopt redundant PLC and spare module, add the reliability of system, stability.
Accompanying drawing explanation
Fig. 1 is the utility model control system theory diagram;
Fig. 2 is the utility model water pump starting or stopping control circuit schematic diagram;
Wherein, 1, power module, 2, CPU module, 3, number connect test module, 4, Analog input mModule, 5, analog input spare module, 6, water pump starting or stopping control circuit, 7, liquid level sensor, 8, pressure transducer, 9, current transducer, 10, man-machine interface.
Embodiment
Below in conjunction with embodiment, the utility model is described in further details:
Due in power transmission sequence foundation construction process, often run into severe geological environment, foundation construction needs draining, be typically employed in the mode that foundation pit surrounding arranges draining well, utilize pumping for water pump to complete construction, water pump, in pump process, is nursed specially owing to lacking personnel, the situation that frequent generation water pump burns, even if send special messenger to nurse, owing to nursing the carelessness of personnel, also often burn water pump, bring no small trouble to construction, not only affect progress but also increase cost.
For above-mentioned condition, inventor carefully studies the various features in water pump operation, to its electrical operation feature, carry out a point situation specific aim process, invent a kind of suction engine automatic control system, this system comprises water pump for drawing water, the water pump starting or stopping control circuit controlling pump operation, core control devices PLC, liquid level sensor for water level detecting, for the pressure transducer that exit of pump hydraulic pressure detects, for the current transducer of water pump operation current detecting, and for optimum configurations amendment man-machine interface (HMI).Wherein pressure transducer is arranged on the water outlet of water pump, and current transducer is arranged on water pump power cable, if water pump operation electric current is comparatively large, also needs to configure current transformer, current transducer input termination current transformer.Described water pump starting or stopping control circuit schematic diagram is see Fig. 2.
As shown in Figure 1, in this system, PLC is by power module 1, CPU module 2, number connect test module 3 and Analog input mModule 4 form, power module 1 is all module for power supply, power to man-machine interface simultaneously, CPU module 2 is connected with number connect test module 3 and Analog input mModule 4 by datawire, water pump starting or stopping control circuit 6 is connected with number connect test module 3 by cable, liquid level sensor 7, pressure transducer 8, current transducer 9 is connected with Analog input mModule 4 by shielded cable, man-machine interface 10 is connected with CPU module 2 by Profibus-DP bus.PLC program gathers water pump operation state signal by number connect test module 3, control the start and stop of water pump simultaneously, liquid level signal is gathered by Analog input mModule 4, water pump discharge pressure signal, water pump operation current signal, PLC control program (comprises the actuating signal of thermorelay with water pump operation state signal, namely the trouble signal in Fig. 2, if there is trouble signal, illustrate that suction engine quits work, operating state signal is now also corresponding is the state signal that suction engine has stopped) as primary condition, pass through liquid level signal, water pump discharge pressure signal, these three Rule of judgment of water pump operation current signal control the start and stop of water pump, when water pump operation, the signal collected and setup parameter are compared, be basic Rule of judgment with liquid level signal, comprehensive descision is carried out in conjunction with pressure signal and current signal.
First PLC program judges water pump operation state; in this, as basic criterion: when being in non-operating state, (system is in automatically; artificial shutdown) time; illustrate that thermorelay action or other reasons cause motor out of service; system sends alarm signal, reminds duty personnel to fix a breakdown.When water pump operation, the signal collected and setup parameter are compared, judge that whether the liquid level signal collected is lower than setting value, whether water pump discharge pressure is lower than setting value, whether running current signal is lower than setting value, as long as three conditions have two or all meet, just illustrate anhydrous, need water pump be stopped.
If three conditions have one not meet, other two meet, by following program process: the liquid level signal collected is lower than setting value, and water pump discharge pressure is lower than setting value, but running current signal is lower than setting value, stop water pump and output current sensor alarm; The liquid level signal collected is lower than setting value, and running current signal is not less than setting value, but water pump discharge pressure is not less than setting value, stops water pump and pressure sensor output warning; The liquid level signal collected is higher than setting value, but water pump discharge pressure is lower than setting value and running current signal is not less than setting value, stops water pump and export liquid level sensor reporting to the police.
If three conditions only have one to meet, by following program process: the liquid level signal collected is lower than setting value, but running current signal be not less than setting value simultaneously water pump discharge pressure be not less than setting value, water pump continues to run and exports liquid level sensor reports to the police, now, current signal and pressure meet simultaneously and could stop water pump; The running current signal collected lower than setting value, but liquid level signal be not less than setting value simultaneously water pump discharge pressure be not less than setting value, water pump stops immediately and exports catastrophe failure alarm signal; The water pump discharge pressure collected is lower than setting value, but liquid level signal is not less than setting value have been run to simultaneously and be not less than setting value, and water pump continues to run and pressure sensor output is reported to the police, and now, current signal and liquid level signal meet simultaneously could stop water pump;
When water pump stops, the signal collected and setup parameter are compared, if the liquid level signal collected is higher than setting value, start water pump.
By the process of said procedure, substantially stop the erroneous judgement because sensor fault causes, caused the situation that water pump burns.Even if some even two sensor experiences failure, system also can normally be run, and has malfunction alarm, reminds attendant to repair in time.
In order to ensure the reliable of system, described liquid level sensor adopts high-accuracy analog sensor, it is 4 ~ 20ma current signal that this sensor exports, continuous measurement can be carried out to liquid level, control accuracy is high, and Installation and Debugging are convenient, can control liquid level as required to the height needed arbitrarily, only need setup parameter, do not need to readjust installation liquid level sensor.
In order to ensure the reliable and stable of system, the CPU module in described PLC adopts the CPU module with redundancy feature, and Analog input mModule is configured to the using and the reserved.After the host CPU of CPU module breaks down, spare CPU is run, and ensures reliability and the work continuity of system.
Claims (4)
1. a suction engine automatic control system, comprise the water pump for drawing water, water pump starting or stopping control circuit (6), PLC, for the liquid level sensor (7) of water level detecting, wherein PLC is by power module (1), CPU module (2), number connect test module (3) and Analog input mModule (4) composition, power module (1) is all module for power supply, CPU module (2) is connected with number connect test module (3) and Analog input mModule (4) by datawire, water pump starting or stopping control circuit (6) is connected with number connect test module (3) by cable, the on off control signal of water pump starting or stopping control circuit (6) is exported by number connect test module (3), water pump operation state signal input number connect test module (3), liquid level sensor (7) is connected with Analog input mModule (4) by shielded cable, liquid level signal input analog amount load module (4), it is characterized in that: also comprise the pressure transducer (8) being installed on pump outlet, and be installed in water pump starting or stopping control circuit for detecting the device of water pump operation electric current, this device is current transducer (9), pressure transducer (8) is connected with Analog input mModule (4) by shielded cable with current transducer (9), pressure signal and current signal input analog amount load module (4).
2. suction engine automatic control system according to claim 1, is characterized in that described liquid level sensor (7) adopts high-accuracy analog sensor, and it is 4 ~ 20ma current signal that this sensor exports, and can carry out continuous measurement to liquid level.
3. suction engine automatic control system according to claim 1, it is characterized in that the CPU module (2) in described PLC adopts the CPU module with redundancy feature, Analog input mModule is configured to the using and the reserved.
4. suction engine automatic control system according to claim 1, it is characterized in that this control system is also provided with man-machine interface (10), man-machine interface (10) is connected with CPU module (2) by Profibus-DP bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598183.7U CN204126913U (en) | 2014-10-16 | 2014-10-16 | Suction engine automatic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598183.7U CN204126913U (en) | 2014-10-16 | 2014-10-16 | Suction engine automatic control system |
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| Publication Number | Publication Date |
|---|---|
| CN204126913U true CN204126913U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420598183.7U Expired - Fee Related CN204126913U (en) | 2014-10-16 | 2014-10-16 | Suction engine automatic control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265655A (en) * | 2014-10-16 | 2015-01-07 | 国家电网公司 | Automatic control system for water pump |
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2014
- 2014-10-16 CN CN201420598183.7U patent/CN204126913U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265655A (en) * | 2014-10-16 | 2015-01-07 | 国家电网公司 | Automatic control system for water pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150128 |