CN201886789U - Flowmeter for main pump seal leakage flow - Google Patents
Flowmeter for main pump seal leakage flow Download PDFInfo
- Publication number
- CN201886789U CN201886789U CN2010206500431U CN201020650043U CN201886789U CN 201886789 U CN201886789 U CN 201886789U CN 2010206500431 U CN2010206500431 U CN 2010206500431U CN 201020650043 U CN201020650043 U CN 201020650043U CN 201886789 U CN201886789 U CN 201886789U
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- China
- Prior art keywords
- flowmeter
- measuring
- leakage flow
- main pump
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Examining Or Testing Airtightness (AREA)
- Measuring Volume Flow (AREA)
Abstract
The utility model belongs to a flowmeter, and particularly relates to a flowmeter for main pump seal leakage flow, which is applicable to flow measurement for main pump seal leakage flow of a pressurized water reactor nuclear power station. The flowmeter comprises a PLC (programmable logic control) controller which is connected with a liquid level measuring device, an electromagnetic valve control device, a man-machine interface, an instant flow indicating and recording device, an integrated flow indicating and recording device and an alarm device respectively. The flowmeter has the advantages that a volumetric flow measuring system is simple in assembly and convenient in installation, a small measuring barrel and magnetostriction liquid level sensor can adopt to severe environments, leakage flow blockage caused by fault of the flowmeter can be prevented effectively by the aid of overflow holes arranged on the small measuring barrel, and the flowmeter is simple and practical by adopting the PLC controller to complete data process.
Description
Technical field
The utility model belongs to a kind of flowmeter, is specifically related to a kind of flow measurement that is applicable to pressurized-water reactor nuclear power plant main pump seal leakage stream.
Background technology
Main pump is the key equipment of nuclear power station, and the flow of monitoring axle water shutoff is one of important parameter that monitors the main pump operation.The normal value of 3# seal leakage stream should be at hundreds of milliliters per hour between several liters.If the excessive then explanation of flow value sealing is worn and torn or damaged, too small as if flow value then may be that water inlet pipe and water outlet pipe stops up, and can accelerate sealing wear like this.Because this leakage value is very little, and water is that boron water may produce crystallization, also has radioactivity in the water, and the flowmeter of existing market comparative maturity is difficult to satisfy measurement requirement.Therefore need a kind of new flowmeter of development to satisfy user demand.
Summary of the invention
The purpose of this utility model provides a kind ofly can be applicable to that range ability is wide, low discharge is very little, the main pump seal leakage of the radioactive measurement occasion of measured medium band stream flowmeter.
The utility model is to realize like this, a kind of main pump seal leakage stream flowmeter, it comprises the PLC controller, and the PLC controller is connected with warning device with liquid level emasuring device, magnetic valve controller, man-machine interface, instantaneous delivery indication pen recorder, integrated flux indication pen recorder respectively.
Described liquid level emasuring device comprises measures the keg body, the top of measuring the keg body is provided with measures the keg upper flange, the side of measuring the bottom of keg body is connected with the leakage flow collection tube, the top of leakage flow collection tube is provided with leakage flow collection tube flange, the bottom of measuring the keg body is connected with the delivery pipe flange by pipeline, the side of measuring the keg bodies top is connected with run-down pipe, run-down pipe is connected with the delivery pipe flange, is provided with solenoid valve between the pipeline of delivery pipe flange and measurement keg body bottom.
The utility model has the advantages that, the composition of volume flow measuring system is simple, and is easy for installation, measures keg and magnetostrictive liquid level sensor and can adapt to rigorous environment, measure keg and be provided with spout hole, can effectively prevent because the fault of flowmeter causes the leakage flow obstruction; Adopt the PLC controller to carry out data processing, simple and practical.And the scope that can monitor of this Flow Measuring System is from 0.1 to hundreds of liter per hours, and measurement range is wide, the precision height.These characteristics make this measuring system aspect uncertainty or noncontinuity flow measurement, have very strong applicability.Such as, as long as change slightly, promptly can be used to monitor the situation that leaks outside of valve; Can also be used to monitoring the throughput ratio of noncontinuity such as the hydrophobic flow of steam trap.
Description of drawings
Fig. 1 is a kind of main pump seal leakage stream flowmeter The general frame provided by the utility model;
Fig. 2 is the liquid level emasuring device synoptic diagram in a kind of main pump seal leakage stream flowmeter provided by the utility model.
Among the figure, 1 measures keg upper flange, 2 run-down pipes, 3 measure keg body, 4 solenoid valves, 5 delivery pipe flanges, 6 leakage flow collection tube flanges, 7 leakage flow collection tubes, 11 liquid level emasuring devices, 12 magnetic valve controllers, 13 man-machine interfaces, 14PLC controller, 15 instantaneous deliveries indication pen recorder, 16 integrated fluxs indication pen recorder, 17 warning devices.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail:
As shown in Figure 1, it comprises PLC controller 14 a kind of main pump seal leakage stream flowmeter, PLC controller 14 is connected with warning device 17 with liquid level emasuring device 11, magnetic valve controller 12, man-machine interface 13, instantaneous delivery indication pen recorder 15, integrated flux indication pen recorder 16 respectively, wherein liquid level emasuring device 11 and magnetic valve controller 12 are arranged on containment inside, and remaining part is arranged on the outside of containment.
As shown in Figure 2, liquid level emasuring device 11 comprises measurement keg body 3 cylindraceous, the top of measuring keg body 3 is fixed with measures keg upper flange 1, the side of measuring the bottom of keg body 3 is connected with leakage flow collection tube 7, the top of leakage flow collection tube 7 is connected with leakage flow collection tube flange 6, the bottom of measuring keg body 3 is connected with delivery pipe flange 5 by pipeline, the side of measuring keg body 3 tops is connected with run-down pipe 2, run-down pipe 2 also is connected with delivery pipe flange 5, is provided with solenoid valve 4 between the pipeline of delivery pipe flange 5 and measurement keg body 3 bottoms.
Main pump seal leakage stream flowmeter is collected flange 6 by leakage flow and is linked to each other with main pump seal leakage outflow process pipeline, links to each other by delivery pipe flange 5 and seal leakage stream discharge technology pipeline.Leakage flow enters measurement keg body 3 through leakage flow collection tube 7 from measuring the keg bottom, has effectively suppressed leakage flow and has entered the level fluctuation that causes when measuring keg, thereby improved measuring accuracy.Measuring keg, to be designed to internal diameter less, and vertical direction is higher, when leakage flow is flowed into, can cause that liquid level significantly raises.
The function of using method of the present invention and various piece is as described below:
Measuring keg body 3 tops is flange 1, is used for installing the high-precision liquid level sensor.Utilize the high-precision liquid level sensor that the liquid level of measuring in the keg is measured, to the PLC controller, the change calculations by liquid level in the unit interval goes out leakage flow to liquid level signal with the teletransmission of 4-20mA electric current.Carry out digital filtering by software programming, further improve measuring accuracy.
When the liquid level in measuring keg body 3 arrives certain height, open solenoid valve 4 automatically, will collect liquid fast and discharge by PLC control, prevent to measure the keg full-water level after, can't not calculate leakage flow because of liquid level does not change; When the liquid level in measuring keg dropped to the height that needs fast, solenoid valve 4 cut out.
When solenoid valve failure can't be opened, when measurement keg liquid level rises to run-down pipe 2, will discharge by run-down pipe, to prevent to stop up leakage flow, guarantee that the main pump leakage flow is unobstructed.In this simultaneously, the PLC controller sends the solenoid valve failure alerting signal, reminds operating personnel.
Main pump seal leakage flow is collected by special liquid level emasuring device, above measuring keg high-precision magnetostriction liquidometer is installed, and the liquid level signal of measuring in the keg is handled to PLC with the current signal teletransmission of 4～20mA.Control Software is calculated the variation of liquid level in the unit interval, and promptly leakage flow is exported 4～20mA electric current, is used for the flow indication.Measure the leakage flow of keg collection and discharge by solenoid valve, solenoid valve is controlled automatically by PLC.The top, side of measuring keg is provided with spout hole, and when solenoid valve failure can't be opened, leakage flow was discharged by spout hole.
Claims (2)
1. flowmeter is flowed in a main pump seal leakage, it is characterized in that: it comprises PLC controller (14), and PLC controller (14) is connected with warning device (17) with liquid level emasuring device (11), magnetic valve controller (12), man-machine interface (13), instantaneous delivery indication pen recorder (15), integrated flux indication pen recorder (16) respectively.
2. a kind of main pump seal leakage stream flowmeter as claimed in claim 1, it is characterized in that: described liquid level emasuring device (11) comprises measures keg body (3), the top of measuring keg body (3) is provided with measures keg upper flange (1), the side of measuring the bottom of keg body (3) is connected with leakage flow collection tube (7), the top of leakage flow collection tube (7) is provided with leakage flow collection tube flange (6), the bottom of measuring keg body (3) is connected with delivery pipe flange (5) by pipeline, the side of measuring keg body (3) top is connected with run-down pipe (2), run-down pipe (2) is connected with delivery pipe flange (5), is provided with solenoid valve (4) between the pipeline of delivery pipe flange (5) and measurement keg body (3) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206500431U CN201886789U (en) | 2010-12-09 | 2010-12-09 | Flowmeter for main pump seal leakage flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206500431U CN201886789U (en) | 2010-12-09 | 2010-12-09 | Flowmeter for main pump seal leakage flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886789U true CN201886789U (en) | 2011-06-29 |
Family
ID=44184337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206500431U Expired - Lifetime CN201886789U (en) | 2010-12-09 | 2010-12-09 | Flowmeter for main pump seal leakage flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201886789U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122862A (en) * | 2013-01-29 | 2013-05-29 | 武汉船用机械有限责任公司 | Liquid leakage monitoring device |
| CN104005946A (en) * | 2014-05-13 | 2014-08-27 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump flow speed controller |
| CN104677432A (en) * | 2013-11-28 | 2015-06-03 | 上海立新液压有限公司 | Magnetostrictive displacement sensing flowmeter and flow measuring method |
| CN111599502A (en) * | 2020-04-14 | 2020-08-28 | 中国核电工程有限公司 | Automatic water filling and calibrating device for liquid level switch |
-
2010
- 2010-12-09 CN CN2010206500431U patent/CN201886789U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122862A (en) * | 2013-01-29 | 2013-05-29 | 武汉船用机械有限责任公司 | Liquid leakage monitoring device |
| CN104677432A (en) * | 2013-11-28 | 2015-06-03 | 上海立新液压有限公司 | Magnetostrictive displacement sensing flowmeter and flow measuring method |
| CN104005946A (en) * | 2014-05-13 | 2014-08-27 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump flow speed controller |
| CN104005946B (en) * | 2014-05-13 | 2016-07-06 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump flow speed controller |
| CN111599502A (en) * | 2020-04-14 | 2020-08-28 | 中国核电工程有限公司 | Automatic water filling and calibrating device for liquid level switch |
| CN111599502B (en) * | 2020-04-14 | 2023-01-17 | 中国核电工程有限公司 | Automatic water filling and calibrating device for liquid level switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |