CN206830427U - The low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage - Google Patents
The low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage Download PDFInfo
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- CN206830427U CN206830427U CN201720395661.8U CN201720395661U CN206830427U CN 206830427 U CN206830427 U CN 206830427U CN 201720395661 U CN201720395661 U CN 201720395661U CN 206830427 U CN206830427 U CN 206830427U
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- measurement apparatus
- sealing
- reactor coolant
- liquid
- low discharge
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Abstract
A kind of low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage, the measuring box (7) of one fixed volume of installation in the shell (1) of measurement apparatus, a liquid-level probe (8) is installed in measuring box (7), liquid-level probe (8) is fixed on top cover (2) by locking nut (9) has high anti-interference and stability, it is highly suitable for the working environment of nuclear power station, meets power station to the safe and stable requirement in use of this kind of electrical equipment.The liquid level gauge nut that is locked is fixed on top cover, and good perpendicularity is still ensured that in the presence of certain external force, does not influence measurement result.
Description
Technical field：It the utility model is related to the low discharge measurement dress of 1000MW reactor coolant pumps sealing leakage
Put.
Background technology：Reactor coolant pump typically uses sealing form, and Seal Design uses active leak mode, and
And leakage rate is very small, about in 5L/h, between 30L/h, must not exceed 50L/h, (value designs list to leakage scope by sealing
Position provides), under so low flow, it is desirable to it is larger to flow progress accurate measurement difficulty, but the flow value can reflect
Go out the working condition of sealing, be power plant operation personnel judge sealing whether important evidence working properly, once sealing occur therefore
Barrier, may cause the radiativity medium of primary Ioops to leak, cause nuclear pollution.
Current low-pressure leak flow measurement mode is measured using ultrasonic flowmeter, i.e., by ultrasonic flowmeter
On the tube wall of low-pressure leak pipeline (nominal diameter DN25), but because ultrasonic flowmeter is surveyed to low discharge medium
The error of amount is larger, occurs the unstable situation of measurement data in use.
The content of the invention：The purpose of this utility model is to provide a set of safe and reliable 1000MW reactor coolant pumps axle
The low discharge measurement apparatus of sealing leak.Operating personnel are made to will be seen that the working condition of sealing.Technology of the present utility model
Scheme is：A kind of low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage, the shell (1) of measurement apparatus
The measuring box (7) of one fixed volume of interior installation, a liquid-level probe (8), liquid-level probe (8) are provided with measuring box (7)
It is fixed on by locking nut (9) on top cover (2), top cover (2) is located at the top of the shell (1) of measurement apparatus, liquid-level probe (8)
It is connected with electrical box (10), processing module (11) is connected in electrical box (10) by electric wire, and medium passes through sealing flange (4)
It is internal to flow into measurement apparatus shell (1), passes through mozzle (5) flow directional detection box (7) after sealing flange, measuring box
(7) bottom is provided with outage, and medium is flowed out by outage, into lower sealing flange (3), by sealing flange (3) most
Power stationization is flowed into eventually holds system pipeline.
The utility model technique effect：When changing measurement low discharge medium in the past, the present situation of inaccuracy is measured, and is used
The measuring method (using the outage below the measuring box and measuring box of constant volume) of " constant volume, fixed row " formula, has higher
Stability, the flow-passing surface of medium employ the runner of optimization design, make the fluid stable of medium, phenomena such as being not in turbulent flow,
Have influence on final measurement result.
The utility model has used capacitive liquid level gauge, has high anti-interference and stability, is highly suitable for
The working environment of nuclear power station, power station is met to the safe and stable requirement in use of this kind of electrical equipment.Liquid level gauge quilt
Locking nut is fixed on top cover, and good perpendicularity is still ensured that in the presence of certain external force, does not influence measurement knot
Fruit.The probe of liquid level gauge uses stainless steel material, avoids polluting measured medium.When the low-pressure leak pipe of reactor coolant pump
During the increase of road flow, because the diameter of outage is fixed, at whole device under atmospheric pressure, medium liquid level in measuring box can be by
Gradually rise, when rising to the alarm height of liquid level gauge setting, liquid level gauge transmits measurement signal to processing module, by processing
Output alarm signal afterwards.
The axle sealing system of 1000MW reactor coolant pumps, is the important component of pump, and its function is sealing reactor
Primary Ioops cooling agent in agent pump, the cooling agent carry radioactivity, once leakage will cause nuclear pollution accident.Low discharge measurement apparatus
Flow switch signal can be provided, when flow value is more than setting value, output alarm signal, operating personnel can be located in time
Reason, it is ensured that pump assembly safe and stable operation.
An important component-low-pressure leak system of axle sealing system, its effect be will cooling and lubrication axle it is close
" injection water " discharge of envelope, and the amount discharged number, whether working properly, in reactor coolant if can reflect sealing
Leakage rate may not exceed 50L/h in the case of pump normal operation, if it exceeds, then sealing is likely to or will lost
Effect, will measure low flow, while require that measuring apparatus is stable, safety.
The utility model solves the problems, such as above-mentioned measurement well, as shown in Fig. 2 the measuring apparatus passes through fixed volume
Measuring box and outage, and capacitance level gauge and processing module, the flow of low-pressure leak can be accurately measured very much, together
When complete equipment it is compact to design, in that context it may be convenient in the nuclear island where reactor coolant pump, when in leakage line
When rate-of flow exceedes limit value, alarm signal is sent at once, power plant operation personnel, will in time be handled, avoid nuclear pollution
Accident occurs.
Measurement apparatus of the present utility model as shown in Figure 3 is carried out in a manner of constant volume is arranged surely, using liquid level feeler lever to liquid level
Measurement, has bearing shell in feeler lever exterior design, measuring box is provided with inside bearing shell, above structure ensure that in low discharge
In the case of the accuracy that measures.
Brief description of the drawings：
Fig. 1 is the utility model structure diagram
Fig. 2 is the utility model circuit theory diagrams
Fig. 3 is 1000MW reactor coolant pump low discharge measurement apparatus test data tables
Embodiment：
As shown in figure 1, a kind of low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage, is tied by machinery
Structure part, liquid level gauge, processing module etc. form, it is characterized in that：The measurement of one fixed volume of installation in the shell 1 of measurement apparatus
Box 7, a liquid-level probe 8 is installed in measuring box 7, liquid-level probe 8 is fixed on top cover 2 by locking nut 9, top cover 2
Positioned at the top of the shell 1 of measurement apparatus, liquid-level probe 8 is connected with electrical box 10, and processing module 11 is connected to by electric wire
In electrical box 10.Medium is flowed into inside measurement apparatus shell 1 by sealing flange 4, passes through the water conservancy diversion after sealing flange
The flow directional detection box 7 of pipe 5, the bottom of measuring box 7 are provided with outage, and medium is flowed out by outage, into lower sealing flange 3,
Power stationization is finally flowed into by sealing flange 3 and holds system pipeline.
Claims (1)
1. a kind of low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage, it is characterized in that：Measurement apparatus
The measuring box (7) of one fixed volume of installation, a liquid-level probe (8), liquid level are provided with measuring box (7) in shell (1)
Probe (8) is fixed on top cover (2) by locking nut (9), and top cover (2) is located at the top of the shell (1) of measurement apparatus, liquid level
Probe (8) is connected with electrical box (10), and processing module (11) is connected in electrical box (10) by electric wire, and medium passes through sealing
It is internal that flange (4) flows into measurement apparatus shell (1), by mozzle (5) flow directional detection box (7) after sealing flange,
The bottom of measuring box (7) is provided with outage, and medium is flowed out by outage, into lower sealing flange (3), passes through sealing flange
(3) finally flow into power stationization and hold system pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395661.8U CN206830427U (en) | 2017-04-17 | 2017-04-17 | The low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395661.8U CN206830427U (en) | 2017-04-17 | 2017-04-17 | The low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206830427U true CN206830427U (en) | 2018-01-02 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720395661.8U Active CN206830427U (en) | 2017-04-17 | 2017-04-17 | The low discharge measurement apparatus of 1000MW reactor coolant pumps sealing leakage |
Country Status (1)
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| CN (1) | CN206830427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111192697A (en) * | 2018-11-15 | 2020-05-22 | 王彬 | Leakage alarm detection system based on siphon principle |
-
2017
- 2017-04-17 CN CN201720395661.8U patent/CN206830427U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111192697A (en) * | 2018-11-15 | 2020-05-22 | 王彬 | Leakage alarm detection system based on siphon principle |
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