CN106323564A

CN106323564A - A wire matrix liquid metal leakage detection and location method

Info

Publication number: CN106323564A
Application number: CN201610727962.6A
Authority: CN
Inventors: 贺建; 吴宜灿; 朱志强; 李春京; 黄群英
Original assignee: Hefei Institutes of Physical Science of CAS
Current assignee: Hefei Institutes of Physical Science of CAS
Priority date: 2016-08-25
Filing date: 2016-08-25
Publication date: 2017-01-11
Anticipated expiration: 2036-08-25
Also published as: CN106323564B

Abstract

The invention discloses a liquid metal leakage detection and positioning method based on a wire matrix. In this method, the detection wires are distributed in the form of a matrix at the welding seam or where leakage needs to be monitored. According to the principle that the conductivity of the liquid metal will make the intersection of the matrix conduct if a leak occurs, the leakage detection is carried out, relying on the rotation of the corresponding wires in the wire matrix. Continuity and monitoring can locate the point where the leak occurs. The method is suitable for detecting liquid metal leakage points of different sizes and shapes, and has the characteristics of flexible use, low cost, accurate detection and positioning, and the like.

Description

A kind of matrix of wires liquid metal Leak Detection and localization method

Technical field

The invention belongs to liquid metal leak detection technology field, be specifically related to a kind of matrix of wires liquid metal leakage inspection Survey and localization method.

Background technology

Liquid metal sodium, lead lithium, lead bismuth etc., owing to having good neutronics performance, anti-radiation performance and heat transfer property, It is widely used as nuclear energy field coolant material.Coolant liquid metal (sodium, lead bismuth etc.) for fast neutron reactor Fusing point is about at 80 DEG C～150 DEG C, and its normal operating temperature scope is 200 DEG C～600 DEG C.Meanwhile, liquid metal lithium, lead lithium etc. by In its good heat-transfer character and tritium breeding property, it is preferably in reactor in following advanced fusion reactor research Coolant material and tritium increment material.In order to liquid metal lead lithium etc. being applied to the fusion reactor in future, a series of pass need to be carried out Research on Key, current lot of domestic and international country has been constructed or has built fluent metal loop.

In loop, pipe welding seam or other position can be destroyed due to external force, design unreasonable, installation quality and detection examination The reason such as defective causes leakage.The time occurred due to leakage and locational uncertainty, in order to will leak out the damage that accident is brought Mistake is preferably minimized, and needs at butt welded seam and easy leak carries out online leakage monitoring.Patent CN103018780A discloses one Probe-type high-frequency-respoliquid liquid metal leakage detector.This patent detection method has a disadvantage in that

1. this patent institute invention probe is put in leakage point, but leakage point usually cannot be bright because of corrosion and pipeline processing technology Really judge, so range of application has limitation.

2. as relatively thick in detection pipeline, and leak the minute leakage being remote from probe, the gravity relied in invention detection will It it is a process the veryest long.

3. can to carry out multiple spot integrated for this invention probe, and each of which is measured point and is both needed to processor and has the port of correspondence to survey Amount, as needed to take substantial amounts of CPU hardware I/O resource or additionally increase hardware resource when measure dot number is more.

If 4. there is irregular weld seam in region, as wanted quick detection to leak, its invention probe is arranged will be troublesome.

The problem that the present invention is directed to above-mentioned patent, it is proposed that a kind of use flexible, with low cost, detection and accurate positioning Liquid metal Leak Detection based on matrix of wires and localization method.

Summary of the invention

The technical problem to be solved in the present invention: the time occurred for liquid metal leakage and the uncertainty of position, and The scrambling of detected weld seam, it is proposed that a kind of liquid metal based on matrix of wires leakage on-line checking and localization method.

The technical solution used in the present invention is: a kind of matrix of wires liquid metal Leak Detection and localization method, the method Using matrix of wires to carry out Leak Detection, matrix of wires includes some longitudinal wires and some horizontal wires, the most some longitudinal directions Wire and some horizontal wires cross are distributed in commissure or need at monitoring leakage, have at longitudinal wire and horizontal wires cross Ceramic device is isolated, and matrix of wires is connected with processing module by Wiring port；The method step is as follows:

Step (1), processing module give longitudinal wire continuous output low level signal by Wiring port, enter horizontal wire Line level is monitored, or processing module gives horizontal wire continuous output low level signal by Wiring port, enters longitudinal wire Line level is monitored, and then shows to leak as being not detected by low level, then continue monitoring；If the low level of detecting, show have Leakage occurs, and goes to step (2)；

Step (2), carrying out leak point positioning, processing module believes to successively by Wiring port longitudinal wire output low level Number, then detect level at horizontal wire, as detected, respective wire is that low level then shows this wire and output low level Leak near the cross point of wire；Or processing module believes to successively by Wiring port horizontal wire output low level Number, then level at the longitudinal wire of detection, as detected, respective wire is that low level then shows this wire and output low level Leak near the cross point of wire.

Wherein, described some longitudinal wires and some horizontal wires, its trend is carried out according to practical situation when arranging, vertical Guiding line and horizontal number of conductors increase and decrease according to concrete application, measure motility and sensitivity to improve.

Wherein, described processing module, it is by CPU module, communication interface, isolation circuit, Power convert electricity Road, power supply interface, indicator light circuit and buzzer circuit composition；Described CPU module and communication interface, buzzer electricity Road, indicator light circuit and isolation circuit connect, and are responsible for being controlled buzzer circuit and indicator light circuit, are responsible for wire square Battle array is controlled and detects, and described CPU module is also responsible for the communication with external equipment；Described communication interface and central authorities Processor connects, and can make external equipment and CPU module two-way communication as interface unit；Described isolation circuit conduct Isolated location makes central processing unit be connected with Wiring port isolation, and isolation circuit uses electromagnetic isolation chip to isolate, and it is patrolled Collect output high level and be not higher than 5V；Described buzzer circuit and indicator light circuit are connected with CPU module respectively, utilize Sound, light mode provide leakage warning function；Described power supply interface can electrically connect with city, carries out voltage by power-switching circuit and turns It is changed to CPU module, communication interface, isolation circuit, power-switching circuit, power supply interface, indicator light circuit and buzzer Circuit provides running voltage.

Present invention advantage compared with prior art is:

(1), the present invention can be used for Leak Detection and location on a large scale, motility is strong, is not limited by a space；

(2), monitoring for many leakage points, the present invention can be greatly lowered hardware cost.

Accompanying drawing explanation

Fig. 1 is liquid metal Leak Detection based on matrix of wires and localization method block diagram；

Fig. 2 is the Leak Detection matrix of wires layout drawing of special weld seam, and wherein, Fig. 2 (a) is that matrix of wires arranges application Figure, Fig. 2 (b) is the layout shape of matrix of wires；

Fig. 3 is that leakage point detects schematic diagram.

Detailed description of the invention

Below in conjunction with the accompanying drawings and detailed description of the invention further illustrates the present invention.

As it is shown in figure 1, a kind of liquid metal Leak Detection and localization method, wherein longitudinal wire 3,4,5 and laterally wire 7,8,9 be distributed across commissure or need at monitoring leakage 6, have at vertical and horizontal wires cross ceramic device carry out every From, matrix of wires is connected with processing module 1 by Wiring port 2；Processing module 1 gives longitudinally (or horizontal) by Wiring port 2 Wire continuous output low level signal, carries out level monitoring to laterally (or longitudinal) wire, then shows as being not detected by low level Leaking, if the low level of detecting, show have leakage to occur, then carry out leak point positioning, processing module 1 is by end Mouth 2 is successively to longitudinally (or horizontal) wire 3,4,5 output low level signal, then at detection horizontal (or longitudinal) wire 7,8,9 Level, as detected, respective wire is that low level then shows that this wire is let out near the cross point of the wire of output low level Leakage.Described vertical and horizontal wire, its trend is carried out according to practical situation when arranging, number of conductors is carried out according to concrete application Increase and decrease, measures motility and sensitivity to improve.Described processing module 1, it by CPU module, communication interface, every Form from circuit, power-switching circuit, power supply interface, indicator light circuit and buzzer circuit；Described middle CPU module Be responsible for matrix of wires being controlled and detects and with the communication of external equipment；Described isolation circuit uses electromagnetic isolation chip to enter Row isolation, its logic output high level is not higher than 5V；Whether described buzzer circuit and indicator light circuit provide and leak and warn Effect.

Being the Leak Detection matrix of wires layout drawing for a kind of special weld seam as shown in Figure 2, Fig. 2 (a) is matrix of wires Being arranged in the actual application drawing being actually needed detection leakage region, Fig. 2 (b) is the layout shape of matrix of wires.Wherein wire can Choosing the copper cash of diameter 1mm as wire, conductor spacing surveyed region height minimum allowable distance 3mm, rise is between 5mm, wire Spacing can be arranged according to practical situation.

If as it is shown on figure 3, in the drawings at position 11, then regardless of revealing direction, all first existing occurs in leakage point Matrix of wires 4,5 and 9,10 intersections are measured.Assume that wire 5 is first measured at wire 10, then a kind of operation detection flow process Can be wire 8,9,10 output low level, processing module detects that low level signal at wire 5, processing module processor can determine that Leakage is had to occur.Next processor carries out leak point positioning, gives wire 8,9,10 output low level successively, and only wire 10 is defeated Could again detecting when going out low level that wire 5 is in low level state, intersecting so can determine that leakage to occur at wire 5 and 10 Near Dian.By wire dense distribution can be improved leak point positioning precision.

Claims

1. a matrix of wires liquid metal Leak Detection and localization method, it is characterised in that: the method uses matrix of wires to enter Row Leak Detection, matrix of wires includes some longitudinal wires and some horizontal wires, the most some longitudinal wires and some laterally Wires cross is distributed in commissure or needs (6) at monitoring leakage, has ceramic device to enter at longitudinal wire and horizontal wires cross Row isolation, matrix of wires is connected with processing module (1) by Wiring port (2)；The method step is as follows:

Step (1), processing module (1) give longitudinal wire continuous output low level signal by Wiring port (2), to horizontal wire Carry out level monitoring, or processing module (1) gives horizontal wire continuous output low level signal by Wiring port (2), to vertical Guiding line carries out level monitoring, then shows to leak as being not detected by low level, then continue monitoring；If the low level of detecting Then show have leakage to occur, go to step (2)；

Step (2), carrying out leak point positioning, processing module (1) gives every longitudinal wire output low successively by Wiring port (2) Level signal, then detects level at horizontal wire, and as detected, respective wire is that low level then shows that this wire is low with output Leak near the cross point of the wire of level；Or processing module (1) is given every successively by Wiring port (2) and is laterally led Line output low level signal, then level at the longitudinal wire of detection, as detected, respective wire is that low level then shows this wire Leak with near the cross point of the wire of output low level.

A kind of matrix of wires liquid metal Leak Detection the most according to claim 1 and localization method, it is characterised in that: institute Stating some longitudinal wires and some horizontal wires, its trend is carried out according to practical situation when arranging, longitudinal wire and laterally leading Line quantity increases and decreases according to concrete application, measures motility and sensitivity to improve.

A kind of matrix of wires liquid metal Leak Detection the most according to claim 1 and localization method, it is characterised in that: institute The processing module (1) stated, it by CPU module, communication interface, isolation circuit, power-switching circuit, power supply interface, refer to Indication lamp circuit and buzzer circuit composition；Described CPU module and communication interface, buzzer circuit, indicator light circuit and Isolation circuit connects, and is responsible for being controlled buzzer circuit and indicator light circuit, is responsible for being controlled matrix of wires and examining Surveying, described CPU module is also responsible for the communication with external equipment；Described communication interface is connected with central processing unit, as Interface unit can make external equipment and CPU module two-way communication；Described isolation circuit makes centre as isolated location Reason device is connected with Wiring port (2) isolation, and isolation circuit uses electromagnetic isolation chip to isolate, and its logic output high level is not Higher than 5V；Described buzzer circuit and indicator light circuit are connected with CPU module respectively, utilize sound, light mode to provide and let out Leakage warning function；Described power supply interface can electrically connect with city, carries out voltage by power-switching circuit and is converted to central processing unit Module, communication interface, isolation circuit, power-switching circuit, power supply interface, indicator light circuit and buzzer circuit offer work electricity Pressure.