CN103277322A - High-precision detection method and device of water pump body liquid level - Google Patents
High-precision detection method and device of water pump body liquid level Download PDFInfo
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- CN103277322A CN103277322A CN2013101716014A CN201310171601A CN103277322A CN 103277322 A CN103277322 A CN 103277322A CN 2013101716014 A CN2013101716014 A CN 2013101716014A CN 201310171601 A CN201310171601 A CN 201310171601A CN 103277322 A CN103277322 A CN 103277322A
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- water pump
- liquid level
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- displacement transducer
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Abstract
The invention discloses a high-precision detection method and device of the water pump body liquid level. The high-precision method and device of the water pump body liquid level is applicable to water level detection in a pressure pipeline, high in detection precision, good in reliability, capable of working under the condition of any water quality. According to the high-precision detection device of the water pump body liquid level, a pressure sensor is installed on an outlet of a water pump, a displacement sensor is installed on an upper opening of a water pool and is connected with a PLC system, and the PLC system is connected with a main machine control cabinet. According to the high-precision detection method of the water pump body liquid level, the machine control cabinet is started, vacuum pumping is conducted, the pressure sensor detects the actual vacuum degree M2 of a water pump pipeline, the PLC system is initialized simultaneously, the displacement sensor detects the height h between the liquid level and the displacement sensor, the starting permitting height H of the water pump is worked out, the H is the sum of h1 and h2, and the h2 is the height between the installation position of the displacement sensor and the position of the upper end of a water pump impeller; when the pipeline liquid level is increased to the H in advance, the H is converted into an theoretical vacuum degree M1, the M1 corresponds to the H, and the M1 and the M2 are compared; when the M2 is less than the M1, the vacuum pumping is conducted continuously, the liquid level of the water pump pipeline is increased; when the M2 is larger than or equal to the M1, the PLC system sends a signal, the main machine control cabinet starts the water pump and delays stopping of a vacuum device.
Description
Technical field
The present invention is a kind of highi degree of accuracy pump body liquid-level detecting method and detection device.
Background technique
The water pump supply and drain water system of present many enterprises all requires to realize automation control, realizes remote monitoring, control automatically, unmanned, the periodical inspection of pumping plant.
The water pump supply and drain water system of control automatically comprises water pump, automatic control system, vacuum system system.When water pump need start, by manually or automatically sending actuating signal, make that water pump P LC enters working state in the automatic control system.After this system starts, at first send the enabled instruction that starts vacuum system and vacuum system control valve, the pressure transducer that is installed in exit of pump simultaneously in this system is gathered the degree of vacuum signal or is begun to gather liquid level signal by inductive transducer, float-ball type sensor or penetration ultrasonic wave sensor, when satisfying the starting mode of pump condition, the signal that collects (both satisfied the priming level of water pump), this system sends enabled instruction, start pump motor, water pump is put into operation.
Above-mentioned pressure transducer detects the negative pressure in the pump housing, but it can only be that fixedly water level starts; The float-ball type liquid level sensor is responsible for detecting the interior liquid level height of the pump housing, and ball float is installed in the floating ball device (this device may be that tubular also may be square box shape), if the impurity deposition is arranged in this device, and the just possible akinesia of ball float; Inductive transducer also is to detect the interior liquid level of the pump housing, and the probe of this sensor is surrounded by impurity easily, with the two poles of the earth short circuit of sensor, is not having under the situation of water, and also therefore the possibility sensor conducts sends error signal.The penetration ultrasonic wave sensor is to detect the interior liquid level of the pump housing, if tube wall incrustation may make signal inaccurate; The height of ground range liquid level can be detected apart from detecting sensor, but the liquid level of required startup water pump in the pump housing can't be detected apart from the distance of liquid level in the well.Sensor can not accurately send signal, and the PLC control system of water pump is with regard to cisco unity malfunction, and control just can't realize automatically.Also do not have reliably, high-precision at present, be fit to the starting mode of pump sensor that the bad enterprise of water quality such as iron and steel uses.
Summary of the invention
A kind of pressure piping middle water level that is applicable to that provides that the present invention will solve detects testing precision height, good reliability, highi degree of accuracy pump body liquid-level detecting method and the detection device that can work under any condition of water quality.
The present invention is achieved in that
1, pressure transducer is installed in exit of pump, displacement transducer is installed in position that can direct projection pond liquid level suitable for reading, pond, by datawire pressure transducer, displacement transducer is connected with the PLC system, and the PLC system is connected with the host computer control case;
2, start the host computer control case, open vacuum system and vacuumize, by the practical vacuum degree M2 of pressure transducer detection water pump pipeline, PLC system initialization simultaneously, displacement transducer is started working, and detects liquid level to the height h between the displacement transducer by displacement transducer
1, flow to the PLC system, described h
1Be variable, the variation of corresponding liquid level height;
3, the permission by PLC system-computed water pump starts height H, H=h
1+ h
2, described h
2The position of installing for displacement transducer is apart from water pump vane upper end position height, h
2Be definite value;
4, by the PLC system resulting H value is converted into pre-lift line liquid level and is the theoretical vacuum degree M1 in the corresponding pipeline of H value, M2 compares with the practical vacuum degree; When M2＜M1, continued to vacuumize by the vacuum system of host computer control case control, promote liquid level in the water pump pipeline; When M2 〉=M1, the PLC system sends the starting mode of pump signal to the host computer control case, starts pump motor by the host computer control case, and time-delay control vacuum system quits work.
Described displacement transducer is penetration ultrasonic wave sensor or apart from detecting sensor.
A kind of highi degree of accuracy pump body liquid level detection device, its special way is: by the PLC system that is connected with the host computer control case, be installed in pressure transducer that exit of pump is used for detecting practical vacuum degree in the water pump pipeline, being installed in that the pond is suitable for reading can the direct projection liquid level and be used for detecting in the pond the contactless displacement transducer of level change and form, described pressure transducer links to each other with the PLC system with displacement transducer, changes by practical vacuum degree reflection water pump pipeline middle water level in the water pump pipeline of pressure transducer detection.
Described displacement transducer is penetration ultrasonic wave sensor or apart from detecting sensor.
This device is installed in the outlet end of water pump with pressure transducer, and displacement transducer is installed in position that can the direct projection liquid level suitable for reading, pond.This device is when operation, and the position that displacement transducer is installed is h apart from liquid level height
1, h
1Be variable, start water pump in the time of just can the arbitrary height liquid level; The position that displacement transducer is installed is h apart from the height of water pump vane upper end
2, h
2Be definite value, this position is changeless.h
1+ h
2=H, H are that the permission of water pump starts height, and just degree of vacuum is represented with negative Pa unit.After the PLC system started, displacement transducer was started working earlier, and displacement transducer is with detected h
1Numerical value flows to the PLC system of this device, and after the PLC routine processes, the PLC system is with detected h
1Numerical value adds h
2Numerical value is to the numerical value of a H of pressure transducer conveying, when the practical vacuum degree in pressure transducer detects pump body reaches this numerical value, pressure transducer is with regard to output signal, start pump motor, and time-delay control vacuum system quits work the end of water pump system startup so far.The present invention is applicable to that the pressure piping middle water level detects, and testing precision height, good reliability can be worked under any condition of water quality.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is control flow chart of the present invention;
Among the figure: the 1-water pump suction pipe, the 2-water pump vane, the 3-water pump, the 4-exit of pump, 5-starts vacuum system, 6-pressure transducer, 7-PLC system, 8-host computer control case, 9-displacement transducer, ground, 10-pond, 11-pond, 12-liquid level.
Embodiment
As shown in Figure 1, a kind of highi degree of accuracy pump body liquid level detection device, by the PLC system 7 that is connected with host computer control case 8, be installed in pressure transducer 6 that exit of pump 4 is used for detecting practical vacuum degree in the water pump pipeline, being installed in that pond 11 is suitable for reading can the direct projection liquid level and be used for detecting the contactless displacement transducer 9 that liquid level 12 changes in the pond 11 and form, described pressure transducer 6 links to each other with PLC system 7 with displacement transducer 9, changes by practical vacuum degree reflection water pump pipeline middle water level in the water pump pipeline of pressure transducer 6 detections.
As shown in Figure 2, this highi degree of accuracy pump body liquid-level detecting method, concrete steps are as follows:
1, water pump 3 is installed in ground, pond 10, water pump suction pipe 1 inserts pond 11, pressure transducer 6 is installed in exit of pump 4, displacement transducer 9 is installed in place that can direct projection liquid level 12 suitable for reading, pond 11, by datawire pressure transducer 6, displacement transducer 9 are connected with PLC system 7, PLC system 7 is connected with host computer control case 8; Displacement transducer described in the present embodiment 9 is penetration ultrasonic wave sensor (also can adopt apart from detecting sensor).
2, start host computer control case 8, open vacuum system 5 and vacuumize, by the practical vacuum degree M2 of pressure transducer 6 detection water pump pipelines, PLC system 7 initialization simultaneously, displacement transducer 9 is started working, and detects liquid level 12 to the height h between the displacement transducer 9 by displacement transducer 9
1, flow to PLC system 7, described h
1Be variable, the variation of corresponding liquid level 10 height;
3, calculated the permission startup height H of water pump 3 by PLC system 7, H=h
1+ h
2, described h
2The position of installing for displacement transducer 9 is apart from water pump vane 2 upper end height, h
2Be definite value;
4, by PLC system 7 resulting H value is converted into pre-lift line liquid level and is the theoretical vacuum degree M1 in the corresponding pipeline of H value, compare with the practical vacuum degree M2 of the water pump pipeline that is detected by pressure transducer 6; When M2＜M1, continued to vacuumize by host computer control case 8 control vacuum systems 5, promote liquid level in the water pump pipeline; When M2 〉=M1, PLC system 7 sends the starting mode of pump signal to host computer control case 8, starts pump motors by host computer control case 8, and time-delay closing vacuum system 5.
Claims (4)
1. highi degree of accuracy pump body liquid-level detecting method is characterized in that:
(1), pressure transducer is installed in exit of pump, displacement transducer is installed in position that can direct projection pond liquid level suitable for reading, pond, by datawire pressure transducer, displacement transducer is connected with the PLC system, and the PLC system is connected with the host computer control case;
(2), start the host computer control case, open vacuum system and vacuumize, by the practical vacuum degree M2 of pressure transducer detection water pump pipeline, PLC system initialization simultaneously, displacement transducer is started working, and detects liquid level to the height h between the displacement transducer by displacement transducer
1, flow to the PLC system, described h
1Be variable, the variation of corresponding liquid level height;
(3), the permission by PLC system-computed water pump starts height H, H=h
1+ h
2, described h
2The position of installing for displacement transducer is apart from water pump vane upper end position height, h
2Be definite value;
(4), by the PLC system resulting H value is converted into pre-lift line liquid level and is the theoretical vacuum degree M1 in the corresponding pipeline of H value, M2 compares with the practical vacuum degree; When M2＜M1, continued to vacuumize by the vacuum system of host computer control case control, promote liquid level in the water pump pipeline; When M2 〉=M1, the PLC system sends the starting mode of pump signal to the host computer control case, starts pump motor by the host computer control case, and time-delay control vacuum system quits work.
2. highi degree of accuracy pump body liquid-level detecting method according to claim 1 is characterized in that: described displacement transducer is penetration ultrasonic wave sensor or apart from detecting sensor.
3. highi degree of accuracy pump body liquid level detection device, it is characterized in that: by the PLC system that is connected with the host computer control case, be installed in pressure transducer that exit of pump is used for detecting practical vacuum degree in the water pump pipeline, being installed in that the pond is suitable for reading can the direct projection liquid level and be used for detecting in the pond the contactless displacement transducer of level change and form, described pressure transducer links to each other with the PLC system with displacement transducer, changes by practical vacuum degree reflection water pump pipeline middle water level in the water pump pipeline of pressure transducer detection.
4. highi degree of accuracy pump body liquid level detection device according to claim 3 is characterized in that: described displacement transducer is penetration ultrasonic wave sensor or apart from detecting sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101716014A CN103277322A (en) | 2013-05-11 | 2013-05-11 | High-precision detection method and device of water pump body liquid level |
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| CN2013101716014A CN103277322A (en) | 2013-05-11 | 2013-05-11 | High-precision detection method and device of water pump body liquid level |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194778A (en) * | 2016-07-25 | 2016-12-07 | 江苏大学 | A kind of Novel experiment device measuring self priming pump self-priming performance and test method |
| CN108594878A (en) * | 2018-04-22 | 2018-09-28 | 北京工业大学 | A kind of device accurately controlling shield model test excavation face supporting power |
| CN110347190A (en) * | 2019-07-11 | 2019-10-18 | 珠海横琴新区圣大环保科技有限公司 | A kind of water body connection liquid level regulator and its operating method |
| CN110905830A (en) * | 2019-12-05 | 2020-03-24 | 绍兴市载沣智能科技有限公司 | Intelligent electronic vacuum drainage controller |
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| JPH1193882A (en) * | 1997-09-18 | 1999-04-06 | Dengyousha Kikai Seisakusho:Kk | Horizontal shaft pump |
| CN101216039A (en) * | 2007-12-28 | 2008-07-09 | 济南奔腾泵业制造有限公司 | Vertical type highly effective energy-saving abrasion-proof pump |
| CN201288937Y (en) * | 2008-04-24 | 2009-08-12 | 江继辉 | Self-control type centrifugal pump vacuum priming device |
| CN201606271U (en) * | 2009-12-24 | 2010-10-13 | 枣庄矿业（集团）有限责任公司蒋庄煤矿 | Fixed type water pump redundant starting signal automatic conversion device |
| JP4795172B2 (en) * | 2006-08-29 | 2011-10-19 | 株式会社電業社機械製作所 | Horizontal shaft pump |
| CN203239588U (en) * | 2013-05-11 | 2013-10-16 | 锦州重型水泵有限公司 | High-precision water pump body liquid level detection device |
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2013
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1193882A (en) * | 1997-09-18 | 1999-04-06 | Dengyousha Kikai Seisakusho:Kk | Horizontal shaft pump |
| JP4795172B2 (en) * | 2006-08-29 | 2011-10-19 | 株式会社電業社機械製作所 | Horizontal shaft pump |
| CN101216039A (en) * | 2007-12-28 | 2008-07-09 | 济南奔腾泵业制造有限公司 | Vertical type highly effective energy-saving abrasion-proof pump |
| CN201288937Y (en) * | 2008-04-24 | 2009-08-12 | 江继辉 | Self-control type centrifugal pump vacuum priming device |
| CN201606271U (en) * | 2009-12-24 | 2010-10-13 | 枣庄矿业（集团）有限责任公司蒋庄煤矿 | Fixed type water pump redundant starting signal automatic conversion device |
| CN203239588U (en) * | 2013-05-11 | 2013-10-16 | 锦州重型水泵有限公司 | High-precision water pump body liquid level detection device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194778A (en) * | 2016-07-25 | 2016-12-07 | 江苏大学 | A kind of Novel experiment device measuring self priming pump self-priming performance and test method |
| CN108594878A (en) * | 2018-04-22 | 2018-09-28 | 北京工业大学 | A kind of device accurately controlling shield model test excavation face supporting power |
| CN108594878B (en) * | 2018-04-22 | 2021-06-25 | 北京工业大学 | Device for accurately controlling shield model test excavation face supporting force |
| CN110347190A (en) * | 2019-07-11 | 2019-10-18 | 珠海横琴新区圣大环保科技有限公司 | A kind of water body connection liquid level regulator and its operating method |
| CN110905830A (en) * | 2019-12-05 | 2020-03-24 | 绍兴市载沣智能科技有限公司 | Intelligent electronic vacuum drainage controller |
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Application publication date: 20130904 |