CN207319713U - A kind of nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor - Google Patents
A kind of nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor Download PDFInfo
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- CN207319713U CN207319713U CN201721140303.9U CN201721140303U CN207319713U CN 207319713 U CN207319713 U CN 207319713U CN 201721140303 U CN201721140303 U CN 201721140303U CN 207319713 U CN207319713 U CN 207319713U
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- water tank
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- leak
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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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Abstract
It the utility model is related to a kind of nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor, the leakage of several weld seams (3) on Leak-tight liner (2) for exchanging boiler (1) is monitored, the heat-exchanging water tank (1) is located at outside the containment of nuclear power plant, the weld seam (3) is equipped with connected leak detection tube (4), the leak detection tube (4) is connected by leak detection tube collection conduits (9) with the measurement pipeline (10) equipped with Fork LIquid Level Switch (11), the Fork LIquid Level Switch (11) is alarmed when liquid level in the measurement pipeline (10) reaches the alarm point setting valve of the Fork LIquid Level Switch (11).Using nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor described in the utility model, there is high sensitivity, without regular adjustment, easy to maintain, the advantages of cost is low, and security risk will not be increased.
Description
Technical field
The utility model belongs to technical field of liquid level measurement, and in particular to a kind of nuclear power plant's pcs system heat-exchanging water tank steel lining
In leakage monitor.
Background technology
The passive containment thermal conduction system (pcs system) of nuclear power plant is used for the core under beyond design basis accident operating mode
The long-term heat extraction of the containment of power plant, including with station blackout, the relevant accident of spray system failure.Super design occurs in power station
During basis accident (including major accident), containment pressure and temperature is reduced to acceptable level, keeps containment complete
Whole property.
Heat-exchanging water tank in pcs system is the hot trap of secondary side passive residual heat and containment heat, it is placed in containment
Outside, it is concrete structure liner Leak-tight liner, is designed together with containment building, at 50.6 meters to 55.6 meters of absolute altitude.Due to
The water loading amount of heat-exchanging water tank should be able to meet after accident 72 it is small when residual heat of nuclear core discharge and the derived cooling of containment waste heat will
Ask, therefore certain precautionary measures need to be taken, is i.e. every reason (such as Leak-tight liner, connected pipeline for causing water tank to leak
Leakage) give accurate measurements and and alarm, so that it is guaranteed that the water loading amount of heat-exchanging water tank, and then ensure pcs system function
It is correct to realize.
In conclusion it is to have important meaning that the Leak-tight liner weld leakage of exchange boiler accurately and timely, which is monitored alarm,
Justice.
Under normal circumstances, the leakage measuring instrumentation device of the Leak-tight liner 2 of heat-exchanging water tank 1 is that setting one is small-sized outside heat-exchanging water tank 1
Water tank 5, as shown in Figure 1.Leak detection tube 4 is embedded with concrete below at the weld seam 3 of the Leak-tight liner 2 of heat-exchanging water tank 1, passes through pipe
Road is connected with water tank 5, then the heat-exchanging water of leakage periodically is discharged into melt pit 7 through water tank 5 and is collected.By in water tank 5
The liquid level of the 6 detection water tank 5 of outer float level switch of side bottom installation, when liquid level reach a certain height, sends alarm,
Show that the Leak-tight liner 2 of heat-exchanging water tank 1 generates leakage, remind power plant operations staff to check concurrency processing system leakage.
According to the measuring principle and configuration mode of this kind of instrument, there are larger problem for this leakage detection method.First, by
In pcs system heat-exchanging water tank to hang over outside containment, 5 mounting arrangements of water tank that leakage monitoring uses get up and will have any problem,
The pipeline needed will be longer.Secondly, there is one section of horizontally and vertically pipeline in the lower section of water tank 5, as long as when this two-section pipeline is expired
Water tank 5 above during water just starts water storage.
Meanwhile outer 6 progress level gauging alarm of float level switch is installed using the side bottom in water tank 5, due to
The reasons in structure of instrument in itself, outer float volume cannot be too small, and certain spacing is needed between upper and lower liquid receiving port, therefore cause to store up
5 volume of water tank cannot be too small.It is larger that furthermore the outer float level of side dress switchs 6 installation space demands.
These above-mentioned reasons, are unfavorable for determining for alarm water level, influence timely monitoring and alarm to water tank leakage.If report
Warn not in time or fail, can seriously cause heat-exchanging water tank water loading amount to be unsatisfactory for the function funeral of requirement even some heat-exchanging water tank
Lose, the heat rejection function of related system cannot be completed.
In addition, the measurement accuracy of buoy type liquid level switch is not also high, the pcs system for participating in alleviating major accident influence
For its monitoring effect it is not ideal enough.Further, this kind of liquid-level switch has mechanical part, it is necessary to regular adjustment, and easily damage
It is bad.
On general civil engineering projects, the leakage monitoring of huge tanks can make in this way, and reason is not have to examine
Consider installation space problem, measurement alarm accuracy requirement is not high, and the effect of water tank is also not required to the major accident that reply occurs.But
For the pcs system of three generations nuclear power plant, it is as important passive accident mitigating system, and heat-exchanging water tank is the system again
Main equipment, effect is most important, therefore needs to design a kind of higher leakage measuring instrumentation device of precision reliable in time to meet to monitor
It is required that.
Utility model content
For defect existing in the prior art, the purpose of this utility model is timely discovery nuclear power station pcs system water tank
Leak-tight liner leaks, and avoiding the refrigerating function of pcs system heat-exchanging water tank cannot meet the requirements.
To achieve the above objectives, the technical solution adopted in the utility model is：A kind of nuclear power plant's pcs system heat-exchanging water tank steel
Lining leakage monitor, the leakage of several weld seams on Leak-tight liner for exchanging boiler are monitored, the heat exchange
Water tank is located at outside the containment of nuclear power plant, wherein, the weld seam is equipped with connected leak detection tube, and the leak detection tube passes through leak detection tube
Collection conduits are connected with the measurement pipeline equipped with Fork LIquid Level Switch, and the liquid level in the measurement pipeline reaches the tuning fork
The Fork LIquid Level Switch is alarmed during the alarm point setting valve of liquid-level switch.
Further, the measurement pipeline bottom level position is less than the leak detection tube collection conduits, the measurement pipeline
One end connects the leak detection tube collection conduits, the pipe cap of other end connection sealing.
Further, the measurement pipeline is connected by eccentric reducer with the leak detection tube collection conduits.
Further, the internal diameter of the measurement pipeline is more than the internal diameter of the leak detection tube collection conduits, to ensure the measurement
Pipeline can retain liquid.
Further, the numerical value of the internal diameter of the measurement pipeline includes at least 66.9mm.
Further, the Fork LIquid Level Switch is threaded through the side upward of the measurement pipeline perpendicular to horizontal plane, described
The tuning fork probe of Fork LIquid Level Switch bottom, from top to bottom penetrates in the measurement pipeline, the alarm point setting valve is described
At the upward 13mm of tuning fork probe end.
Further, when the liquid level in the measurement pipeline reaches the alarm point setting valve, the measurement pipeline
Interior liquid level is 30mm.
Further, welded and installed tube socket, the Fork LIquid Level Switch pass through the installation tube socket on the measurement pipeline
It is threaded through on the measurement pipeline.
Further, the Fork LIquid Level Switch passes through externally fed, voltage class 220VAC, the Fork LIquid Level Switch
Gauge outfit positioned at the outside of the measurement pipeline, and switch block is housed, the switch block uses single-pole double-throw switch (SPDT), described
The degree of protection of the gauge outfit of Fork LIquid Level Switch is IP66.
Further, discharge pipe is connected in the side downward of the measurement pipeline, the discharge pipe is equipped with valve, institute
Valve is stated close to the measurement pipeline, when the valve opening, the liquid in the measurement pipeline can be from the delivery pipe
Road flows into the melt pit below the containment.
The beneficial effects of the utility model have it is following some：
1. measuring device provided by the utility model is easy to operate, as a result of Fork LIquid Level Switch as measuring instrument
Table, therefore do not have to regular adjustment, easy to maintain, cost is low and will not increase security risk；The measurement of Fork LIquid Level Switch is former
It is tuning fork (probe) under the driving of piezoelectric ceramics to manage, and is vibrated with certain mechanical resonant frequency.Piezoelectric ceramics is mechanically secured
Therefore can be from the limitation of temperature shock.Once tuning fork (probe) touches measured medium, vibration frequency can change.Integral type
Electronic unit detect the change of this vibration frequency, and be converted into switch command.Therefore this kind of instrument measurement precision is high, as long as
Tuning fork (probe) is capped, and delay about 0.5 second or so can be to nuclear power plant's pcs system output signal.
2. collecting the liquid of leakage as a result of measurement pipeline, therefore eliminate measurement water storage of the prior art
Case 5, requirements of installation space is minimized；And due to measure pipeline 10 volumetric ratio water tank 5 of the prior art it is much smaller,
Fork LIquid Level Switch 11 has very high sensitivity, as long as also allowing for after there is a small amount of leakage, measures the liquid level in pipeline 10
Height can meet the alarm setting valve of Fork LIquid Level Switch, and measurement promptly and accurately, realizes the alarm for leakage, effectively inspection
Survey the security situation of the weld seam 3 of heat-exchanging water tank 1.
Brief description of the drawings
Fig. 1 is that existing heat-exchanging water tank Leak-tight liner weld leakage monitoring device is shown in the specific background technology of the utility model
It is intended to；
Fig. 2 is nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage prison described in the utility model embodiment
Survey the schematic diagram of device；
In figure：1- heat-exchanging water tanks, 2- Leak-tight liners, 3- weld seams, 4- leak detection tubes, 5- water tanks, the outer float level switches of 6-, 7-
Melt pit, 8- eccentric reducers, 9- leak detection tube collection conduits, 10- measurement pipelines, 11- Fork LIquid Level Switch, 12- valves, 13- rows
Put pipeline.
Embodiment
The utility model is further described with reference to the accompanying drawings and examples.
As shown in Fig. 2, a kind of nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor, for exchanging boiler 1
Leak-tight liner 2 on the leakages of several weld seams 3 (weld seam 3 is some places, is only to illustrate in attached drawing) be monitored (heat-exchanging water tank
1 outside the containment of nuclear power plant), including leak detection tube collection conduits 9, measurement pipeline 10, Fork LIquid Level Switch 11, delivery pipe
The grade component of road 13.
Wherein leak detection tube 4 is connected with some weld seams 3 on the Leak-tight liner 2 of heat-exchanging water tank 1, and leak detection tube 4 is embedded in weld seam 3
Locate in lower concrete, top end opening is connected with weld seam 3, and low side open at one end is drawn downwards from concrete.Leak detection tube 4 (
Low side opening) it is connected by leak detection tube collection conduits 9 with the measurement pipeline 10 equipped with Fork LIquid Level Switch 11, what weld seam 3 leaked
Liquid can be imported into by leak detection tube 4 in measurement pipeline 10, opened when the liquid level in measurement pipeline 10 reaches tuning fork liquid level
Fork LIquid Level Switch 11 is alarmed when closing 11 alarm point setting valve.
One end connection leak detection tube collection conduits 9 of pipeline 10 are measured, the other end connects pipe cap (pipe cap plays sealing process),
The horizontal level for measuring the bottom of pipeline 10 is less than leak detection tube collection conduits 9.When the liquid in measurement pipeline 10 reaches certain water
Position when, measure pipeline 10 in liquid can from discharge pipe 13 flow into containment below melt pit 7 (discharge pipe 13 not with
The bottom end opening that measurement pipeline 10 connects is arranged on the top of melt pit 7).
Measurement pipeline 10 is connected by eccentric reducer 8 with the leak detection tube collection conduits 9.
The internal diameter for measuring pipeline 10 is more than the internal diameter of leak detection tube collection conduits 9, to ensure that the measurement pipeline 10 can be deposited
Liquid stay.The interior diameter of measurement pipeline 10 includes at least 66.9mm.
Fork LIquid Level Switch 11 is threaded through the side upward of measurement pipeline 10 perpendicular to horizontal plane, and Fork LIquid Level Switch 11 is wrapped
Include gauge outfit and tuning fork is popped one's head in two parts, the tuning fork probe of Fork LIquid Level Switch 11 is positioned at the bottom of Fork LIquid Level Switch 11, tuning fork
Probe is from top to bottom penetrated in measurement pipeline 10, alarm point setting valve at the upward 13mm of tuning fork probe end (in this application,
The length of the tuning fork probe of the bottom of Fork LIquid Level Switch 11 is 96mm.When the liquid level in measurement pipeline 10 reaches tuning fork liquid
Fork LIquid Level Switch (when namely tuning fork probe end is located at below liquid level at 13mm) during the alarm point setting valve of bit switch 11
11 alarm.When the liquid level in measurement pipeline 10 reaches alarm point setting valve, the liquid level in pipeline 10 is measured
For 30mm, that is, the inner side 30mm of the tube wall of 10 side on the lower of liquid level range measurement pipeline.
Installation tube socket is welded with measurement pipeline 10, Fork LIquid Level Switch 11 is threaded through measurement pipeline 10 by installing tube socket
On.It is G3/4 ", installing pipe seat height degree 43mm to install tube socket screw thread.
Fork LIquid Level Switch 11 is located at by externally fed, voltage class 220VAC, the gauge outfit of Fork LIquid Level Switch 11
The outside of pipeline 10 is measured, and switch block is housed, switch block uses single-pole double-throw switch (SPDT), the gauge outfit of Fork LIquid Level Switch 11
Degree of protection is IP66.
The top of discharge pipe 13 is connected to the side downward of measurement pipeline 10, and bottom end opening is arranged on the top of melt pit 7, row
To put pipeline 13 and be equipped with valve 12, valve 12 is positioned close on the position of measurement pipeline 10, when valve 12 is opened, measurement pipe
Liquid in road 10 can flow into the melt pit 7 below containment from discharge pipe 13.
Device described in the utility model is not limited to the embodiment described in embodiment, those skilled in the art
Technical solution according to the present utility model draws other embodiments, also belongs to the technological innovation scope of the utility model.
Claims (10)
- A kind of 1. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor, for exchanging the Leak-tight liner of boiler (1) (2) leakage of several weld seams (3) on is monitored, and the heat-exchanging water tank (1) is located at outside the containment of nuclear power plant, it is special Sign is：The weld seam (3) is equipped with connected leak detection tube (4), and the leak detection tube (4) is by leak detection tube collection conduits (9) with being equipped with The measurement pipeline (10) of Fork LIquid Level Switch (11) is connected, and the liquid level in the measurement pipeline (10) reaches the tuning fork liquid The Fork LIquid Level Switch (11) is alarmed during the alarm point setting valve of bit switch (11).
- 2. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 1, it is characterized in that：It is described Measurement pipeline (10) bottom level position is less than the leak detection tube collection conduits (9), one end connection of the measurement pipeline (10) The leak detection tube collection conduits (9), the pipe cap of other end connection sealing.
- 3. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 2, it is characterized in that：It is described Measurement pipeline (10) is connected by eccentric reducer (8) with the leak detection tube collection conduits (9).
- 4. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 2, it is characterized in that：It is described The internal diameter for measuring pipeline (10) is more than the internal diameter of the leak detection tube collection conduits (9), to ensure that the measurement pipeline (10) can Retain liquid.
- 5. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 4, it is characterized in that：It is described The numerical value of the internal diameter of measurement pipeline (10) includes at least 66.9mm.
- 6. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 4, it is characterized in that：It is described Fork LIquid Level Switch (11) is threaded through the side upward of the measurement pipeline (10), the Fork LIquid Level Switch perpendicular to horizontal plane (11) the tuning fork probe of bottom, from top to bottom penetrates in the measurement pipeline (10), the alarm point setting valve is the tuning fork At the upward 13mm of probe end.
- 7. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 6, it is characterized in that：Work as institute When stating the liquid level in measurement pipeline (10) and reaching the alarm point setting valve, the liquid level in the measurement pipeline (10) For 30mm.
- 8. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 6, it is characterized in that：It is described Welded and installed tube socket on pipeline (10) is measured, the Fork LIquid Level Switch (11) is threaded through the measurement by the installation tube socket On pipeline (10).
- 9. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 6, it is characterized in that：It is described Fork LIquid Level Switch (11) is 220V AC by externally fed, voltage class, and the gauge outfit of the Fork LIquid Level Switch (11) is located at The outside of the measurement pipeline (10), and switch block is housed, the switch block uses single-pole double-throw switch (SPDT), the tuning fork liquid The degree of protection of the gauge outfit of bit switch (11) is IP66.
- 10. nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor as claimed in claim 1, it is characterized in that：Institute The connection discharge pipe of side downward (13) of measurement pipeline (10) is stated, the discharge pipe (13) is equipped with valve (12), described Valve (12) is close to the measurement pipeline (10), when the valve (12) is opened, the liquid energy in the measurement pipeline (10) Enough melt pits (7) flowed into from the discharge pipe (13) below the containment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721140303.9U CN207319713U (en) | 2017-09-07 | 2017-09-07 | A kind of nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721140303.9U CN207319713U (en) | 2017-09-07 | 2017-09-07 | A kind of nuclear power plant's pcs system heat-exchanging water tank Leak-tight liner leakage monitor |
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| CN207319713U true CN207319713U (en) | 2018-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701489A (en) * | 2019-09-27 | 2020-01-17 | 南京新核复合材料有限公司 | On-line monitoring double-wall glass reinforced plastic pipe conveying system |
-
2017
- 2017-09-07 CN CN201721140303.9U patent/CN207319713U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701489A (en) * | 2019-09-27 | 2020-01-17 | 南京新核复合材料有限公司 | On-line monitoring double-wall glass reinforced plastic pipe conveying system |
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