CN103018780B - A kind of Probe-type high-frequency-respoliquid liquid metal leakage detector - Google Patents
A kind of Probe-type high-frequency-respoliquid liquid metal leakage detector Download PDFInfo
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- CN103018780B CN103018780B CN201210591619.5A CN201210591619A CN103018780B CN 103018780 B CN103018780 B CN 103018780B CN 201210591619 A CN201210591619 A CN 201210591619A CN 103018780 B CN103018780 B CN 103018780B
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Abstract
The invention provides a kind of Probe-type high-frequency-respoliquid liquid metal leakage detector, comprise: export probe, input probe, export probe fixed fastener, input probe fixed fastener, 24V direct supply, main control board and connection terminal, the connection terminal that main control board is drawn connects output probe and input probe, exports probe and input probe to be fixed on liquid metal leak by fixed fastener.When there being liquid metal to leak, exporting probe and input probe just can conducting, can main control board be triggered in turn on process, exporting Continuity signal for other checkout equipment by main control board.Meanwhile, main control board can export the output signal of probes in 10 μ s internal cutting ofves, prevent the cause owing to exporting probe signals cause whole liquid metal and pipeline charged, thus affect the work of other sensor that contacts with liquid metal or pipeline.This device can detect fast and leaks and export leakage signal, and can cut off the output of the probe signals produced because of liquid metal conducting in time.
Description
Technical field
The invention belongs to liquid metal leakage measuring instrumentation technical field, be specifically related to a kind of probe-type, high frequency sound liquid metal leakage measuring instrumentation device.
Background technology
Liquid metal is the metal of high conductivity, and its leakage measuring instrumentation method mainly contains gravity pallet and probe two kinds of methods at present.
The principle that gravity pallet detects liquid metal leakage is: after leakage appears in liquid metal, it can drop on gravity pallet under gravity, now the quality of pallet can increase, thus exports corresponding signal to checkout equipment, just can obtain the signal that liquid metal leaks.Whether its advantage is: the request for utilization that can adapt to rugged surroundings, and can detect on a large scale and have liquid metal to leak.But there is following shortcoming in it:
(1) online dynamic responding speed is slow, because this kind of detection method only drops on gravity pallet can leakage signal be detected at liquid metal, and leak into from liquid metal and drop to pallet and need the regular hour, thus can not detect that liquid metal leaks the very first time;
(2) whether can not obtain leakage point position accurately, have liquid metal to leak because this kind of detection method normally detects in a certain scope and region, the liquid metal that accurately can not detect a certain position leaks.
The principle that traditional probe-type detects liquid metal leakage is: probe is arranged in position that some easily occurs to leak, when there being liquid metal to leak, two electrodes of meeting conducting probe, thus export corresponding signal to checkout equipment, just can obtain the signal of liquid metal.Its advantage is: can detect a certain position accurately and whether occur that liquid metal leaks, rapid dynamic response speed.But there is following shortcoming in the method that traditional probe-type detects liquid metal leakage:
(1) after probe conducting, can make liquid metal or pipeline charged, thus affect other and arrange superincumbent working sensor.This is because, when liquid metal leaks two electrodes of conducting probe, now, whole pipeline is also thereupon charged, though can be clamped by this current potential by the mode of ground connection is zero, but due to pipeline or the distributed capacitance of metal itself and the existence of internal resistance, can make it still with certain voltage, this voltage signal can have influence on other and directly be arranged in working sensor above its pipeline;
(2) the fixing of probe comparatively bothers, probe to be enable on the one hand to detect liquid metal timely leak, this just requires that probe distance leakage point or pipeline can not be too far away, to ensure that probe is when vibration or fluctuation appear in pipeline on the other hand, former point of fixity can not be departed from, in case terminate in tube contacts or probe two electrode contact, thus cause false triggering.Not only can not be too far away but also can not be too near by arrangement requirement two probe electrode of above 2 known probes, it is cumbersome for installing like this.
To sum up, the shortcoming of above measuring method limits its usable range.Device of the present invention is also utilize probe-type liquid metal to leak, but is that it overcomes the shortcoming of conventional probe formula liquid metal Leak Detection, makes its scope of application wider, safeguards convenient, and can integrated multiple spot liquid metal leak detecting device.
Summary of the invention
The object of the invention is to design that a kind of structure is simple, easy for installation, high frequency response and there is the probe-type liquid metal leakage device automatically cutting off probe electrode.
The present invention is to provide the device that a kind of probe-type detects liquid metal leakage, it comprises: export probe, output probe fixed fastener, input probe fixed fastener, input probe, connection terminal, checkout equipment, main control board and 24V direct supply.Its relativeness is: 24V direct supply is connected to main control board, the output port of main control board is connected to connection terminal, export probe and input probe and be connected to respectively on connection terminal, exporting probe is fixed on output probe fixed fastener, input probe is fixed on input probe fixed fastener, exporting probe fixed fastener and inputting probe fixed fastener is fixed on tested pipeline, and wherein liquid metal is in pipeline.
Its course of work is: 24V direct supply exports 24V direct current for main control board, the connection terminal of main control board is connected to output probe, exporting probe is an output+24V electrode, now, exporting between probe and input probe does not have conducting to form closed-loop path, and when there being liquid metal to leak, liquid metal can flow through under gravity and export probe and input probe, cause and export probe and the conducting of input probe, form closed-loop path.And input probe one end and be connected to connection terminal, leakage signal can be transferred to main control board.Main control board record leakage signal also exports leakage signal to other checkout equipment, simultaneously, main control board can export the output voltage signal of probe in 10 μ s internal cutting ofves, ensure that liquid metal or pipeline are in electroless state, thus the normal use that other is arranged on the sensor on pipeline can not be affected.
Need to supplement further: export the pipeline that probe fixed fastener and input probe fixed fastener can adapt to 16mm-120mm caliber, can be flexible be fixed on pipeline, easy for installation, be convenient to regulate.
Described main control board can without in liquid metal leakage situation, give for 24V direct current and export probe, leak conducting when there being liquid metal and export probe with when inputting probe, obtain metal leakage signal and export this signal to checkout equipment, simultaneously, the voltage signal of probes can be exported in 10 μ s internal cutting ofves, thus avoid because of liquid metal or pipeline charged and affect other working sensor being arranged on pipeline or directly contacting with liquid metal.
In sum, the advantage of apparatus of the present invention compared with existing liquid metal leakage device is:
1), the probe fixed fastener of apparatus of the present invention can use the caliber of pipeline to carry out suitable adjustment according to reality, just can meet the demand that probe is fixing, thus ensure the reliability and stability that probe is fixing, decrease a large amount of artificial peace processes.
2), apparatus of the present invention have the function automatically cutting off electrode signal, can without in liquid metal leakage situation, for 24V direct current to probe, when there being liquid metal to leak conducting two probes, device can automatic acquisition metal leakage signal export this signal to checkout equipment, simultaneously, can at the voltage signal of 10 μ s internal cutting off probes, thus avoid because of liquid metal or pipeline charged and affect other working sensor being arranged on pipeline or directly contacting with liquid metal, ensure that the reliability and stability of measuring system.
Accompanying drawing explanation
Fig. 1 liquid metal leak detecting device pie graph;
Fig. 2 fixed fastener structural representation;
Fig. 3 main control board theory diagram;
Fig. 4 system monitoring time diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 represents liquid metal leak detecting device pie graph.It mainly comprises: export probe 1, export probe fixed fastener 2, input probe fixed fastener 3, input probe 4, connection terminal 6, checkout equipment 7, main control board 8 and 24V direct supply 9.Its relativeness is: 24V direct supply 9 is connected to main control board 8, the output port of main control board 8 is connected to connection terminal 6, exporting probe 1 and inputting probe 4 is connected on connection terminal 6 respectively, exporting probe 1 is fixed on output probe fixed fastener 2, input probe 4 is fixed on input probe fixed fastener 3, exporting probe fixed fastener 2 and inputting probe fixed fastener 3 is fixed on tested pipeline 5, and wherein liquid metal is in pipeline 5.
Its concrete implementation process be following some:
1, civil power 220V is after 24V direct supply 9AC-DC changes, and be converted to 24V direct supply for whole contrive equipment, the power of direct supply 9 is 65W, exports 24V direct current for single.Direct supply 9 and main control board 8 are placed nearby, and add isolation and shield device between, prevent the normal work of the electromagnetic interference influence main control board 8 in AC-DC transfer process.
2,24V direct current is after the DC-DC conversion of main control board 8, exports 5V direct current, for the electronic devices and components work of main control board 8.Exporting probe 1 is connected on the output wiring terminal 6 of main control board 8, exports 24V direct current, now, exports probe 1 as an electrode.When there being liquid metal to leak, just conducting probe 1 and input probe 4 can be exported, now 24V direct current just inputs to the input wires terminal 6 of main control board through input probe 4, corresponding 24V direct current signal is collected by main control board, after to this signal transacting, export the 24V direct current on probe 1 in 10 μ s internal cutting ofves, meanwhile, dispensing liquid metal leakage signal is to relevant monitoring equipment 7.
3, it should be added that, the distance between output probe 1 and input probe 4 is by adjusting in construction process, and usual its spacing is 2 ~ 3mm.Export probe 1 and input probe and be fixed on tested pipeline 5 with input probe fastener 3 by exporting probe fastener 2.
What Fig. 2 represented is fixed fastener structural representation.Fixed fastener comprises output probe fixed fastener 1 and input probe fixed fastener 4, and its structure is the same.Include: gib screw 2A, fixed dam 2B, V-arrangement pickup groove 2C and gib screw 2D.The top angle of V-arrangement pickup groove 2C is 60 degree, and when the pipeline be fixed is put into V-arrangement pickup groove 2C, its external diameter can putting into pipeline just can be extrapolated, specific as follows:
1, the minimum outer diameter tube be fixed
Fixed dam 2B is to the top distance H0+H1 of V-arrangement pickup groove 2C, fixing when this distance value is structural design, and its value is 412mm.The ultimate range that H1 can extend for gib screw 2A is 376mm, obtains pipe radius like this according to relevant geometric relationship:
Wherein, R1 is the radius of pipeline, and H0 is the distance of gib screw top to V-arrangement pickup groove top, and after related data being brought into, calculating the minimum outer diameter tube be fixed is:
R1＝16mm
2, the maximum outer diameter tube be fixed
According to calculated relationship above, can obtain the maximum outer diameter tube R2 be fixed is:
Wherein, H3 is the distance of gib screw top to V-arrangement pickup groove top, and its value is 52mm, and substitution above formula calculates the maximum outer diameter tube be fixed and is:
R2＝120mm
It is pointed out that after fixed fastener is fixing, also need output probe 2 and input probe 3 to be fixed on corresponding fixed fastener, and suitable adjustment two exports the distance between probe 2 and input probe 3, distance namely can not be too large, also can not be too small.Distance crosses conference may conducting not two probes when causing liquid metal to leak, distance too closely time can cause pipe vibration and two probes that mislead.The mounting distance that the present invention implements is 2 ~ 3mm.
What Fig. 3 represented is main control board theory diagram.It comprises: voltage conversion unit, STC12C5A60S2 single-chip microcomputer, triode converting unit W1 and triode converting unit W2, field effect transistor unit U1 and U2 and Phototube Coupling unit.Its specific implementation process is:
1,24V direct current is after voltage conversion unit conversion, and be converted to the direct current of 5V, the direct current of 5V is for other component units of main control board 8.Wherein, the voltage conversion chip of voltage conversion unit is LM2596, the changing voltage of the highest support of this chip is 37V, 24V direct current can be converted to stably the direct current of 5V in the present invention, simultaneously, this chip is also configured with bypass and filter capacitor and inductance, ensures that the ripple of output voltage is less.
2, main control chip STC12C5A60S2 single-chip microcomputer is through triode converting unit W1 controlling filed effect pipe unit U1, and now, field effect transistor unit U1 is in saturation conduction state, and its output signal is 24V direct current, and exports on output probe 1 through connection terminal 6.When there being liquid metal to leak, liquid metal can flow through under gravity and export probe 1 and input probe 4, thus conducting two probe.At this moment, 24V DC signal just can transfer to main control board through input probe 4, is isolated by this signal, and its input voltage is down to 5V from 24V, thus input to main control chip STC12C5A60S2 single-chip microcomputer and trigger single-chip microcomputer by Phototube Coupling unit.After to this trigger pip process, STC12C5A60S2 can input a low level to triode unit W1, thus field effect transistor unit U1 is ended, and now, the 24V d. c. voltage signal be added on input probe 1 is just cut off.On the other hand, a high level signal can be exported after STC12C5A60S2 single-chip microcomputer is triggered to triode unit W2, thus conducting field effect transistor unit U2, the final 24V direct current that exports is to monitoring equipment.
3, main control board 8 can continue to keep dispensing liquid metal leakage signal to monitoring equipment, until liquid metal leakage signal is removed or artificial restarted main control board 8.
Fig. 4 represents system monitoring time diagram.Measurement and control signal involved by liquid metal leakage monitoring system of the present invention comprises: input probe monitor signal, controls to export probe signals and system output leakage signal.In implementation process, its concrete sequential relationship is as follows:
1, when exporting probe 1 and input probe 4 by after the liquid metal conducting of leaking, a 24V d. c. voltage signal can be exported from input probe, simultaneously, this signal can trigger main control chip STC12C5A60S2 single-chip microcomputer and cut off the 24V d. c. voltage signal being added in and exporting on probe 1, from input probe monitor 24V d. c. voltage signal to export probe signals be cut off between time delay be t1, the time of this time delay is within 1 μ s.Shutoff signal action time is t2, and its duration is at 5 μ about s in the present invention.As from the foregoing, in whole observation process, monitor signal from input probe to be cut off duration to be no more than 10 μ s to being added in the signal exported probe.
2, main control chip STC12C5A60S2 understands the monitoring equipment of dispensing liquid metal leakage signal to other after being triggered, this process controls triode by main control chip I/O pin output signal and field effect transistor unit realizes, the time delay monitored between leakage signal to main control chip output leakage signal from input probe is t3, in the present invention, its value is about 15 μ s.This signal demand continues to keep a period of time t4, to guarantee collected by other monitoring equipment fully and respond.In the present invention, this retention time is the shortest is 1s.
Apparatus of the present invention overcome the shortcoming of conventional probe formula liquid metal Leak Detection, make its scope of application wider, safeguard convenient, and can integrated multiple spot liquid metal leak detecting device.
The part that the present invention does not elaborate belongs to techniques well known.
Although be described the illustrative embodiment of the present invention above; so that the technician of this technology neck understands the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined, these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection in appended claim.
Claims (1)
1. a Probe-type high-frequency-respoliquid liquid metal leakage detector, is characterized in that: this device comprises: export probe (1), export probe fixed fastener (2), input probe fixed fastener (3), input probe (4), connection terminal (6), checkout equipment (7), main control board (8) and 24V direct supply (9), 24V direct supply (9) is connected to main control board (8), the output port of main control board (8) is connected to connection terminal (6), exporting probe (1) and inputting probe (4) is connected on connection terminal (6) respectively, exporting probe (1) is fixed in output probe fixed fastener (2), input probe (4) is fixed in input probe fixed fastener (3), exporting probe fixed fastener (2) and inputting probe fixed fastener (3) is fixed on tested pipeline (5), wherein liquid metal is in pipeline (5), its course of work is as follows: 24V direct supply (9) exports 24V direct current for main control board (8), the connection terminal (6) of main control board is connected to and exports probe (1), exporting probe (1) is an output+24V electrode, now, exporting between probe (1) and input probe (4) does not have conducting to form closed-loop path, when there being liquid metal to leak, liquid metal can flow through under gravity and export probe (1) and input probe (4), cause and export probe (1) and input probe (4) conducting, form closed-loop path, and input probe (4) one end and be connected to connection terminal (6), leakage signal can be transferred to main control board (8), main control board (8) record leakage signal also exports leakage signal to checkout equipment (7), simultaneously, main control board (8) can export the output voltage signal of probe (1) in 10 μ s internal cutting ofves, ensure that liquid metal or pipeline are in electroless state, thus the normal use that other is arranged on the sensor on pipeline (5) can not be affected,
Described output probe fixed fastener (2) and input probe fixed fastener (3) can adapt to the fixing requirement of different pipeline (5) caliber, suitable conduit caliber scope is: 16mm-120mm, it is flexible for installation, is convenient to dismounting and safeguards;
Described main control board (8) can without in liquid metal leakage situation, give for 24V direct current and export probe (1), when there being liquid metal to leak conducting output probe (1) and input probe (4), obtain metal leakage signal and export this signal to checkout equipment (7), simultaneously, the voltage signal of probe (1) can be exported in 10 μ s internal cutting ofves, thus avoid because of liquid metal or pipeline charged and affect other working sensor being arranged on pipeline (5) or directly contacting with liquid metal;
The probe fixed fastener of this pick-up unit can use the caliber of pipeline to carry out suitable adjustment according to reality, just can meet the demand that probe is fixing, thus ensures the reliability and stability that probe is fixing, decreases a large amount of artificial installation processes.
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| CN201210591619.5A CN103018780B (en) | 2012-12-31 | 2012-12-31 | A kind of Probe-type high-frequency-respoliquid liquid metal leakage detector |
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| CN103644458B (en) * | 2013-11-08 | 2016-01-27 | 上海华力微电子有限公司 | Liquid leakage detection device |
| CN106323564B (en) * | 2016-08-25 | 2018-09-04 | 中国科学院合肥物质科学研究院 | A kind of matrix of wires liquid metal leak detection and localization method |
| CN107884832A (en) * | 2016-09-29 | 2018-04-06 | 宝钢新日铁汽车板有限公司 | A kind of zinc pot leaks zinc detector |
| CN107741302B (en) * | 2017-08-11 | 2019-06-28 | 昆明品启科技有限公司 | A kind of device and method leaked using Six Degrees vibration detection liquid metal |
| CN116928604B (en) * | 2023-07-31 | 2024-01-02 | 浙江昊阔物联科技有限公司 | Automatic water pipe water leakage detection device |
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| CN1657895A (en) * | 2005-03-17 | 2005-08-24 | 大连理工大学 | On-line monitoring alarm device for leakage of water cooler |
| CN101718608A (en) * | 2009-11-03 | 2010-06-02 | 重庆山外山科技有限公司 | Electromagnetic valve leak detection system for blood purification |
| CN101836060A (en) * | 2007-10-23 | 2010-09-15 | 大金工业株式会社 | Fluid sensor, refrigerant leakage detection device, refrigeration device, and refrigerant leakage detection method |
| CN102290788A (en) * | 2011-08-08 | 2011-12-21 | 深圳市亚特尔科技有限公司 | Measurement protective device of submersible pump motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6295438A (en) * | 1985-10-23 | 1987-05-01 | Hitachi Ltd | Water leak detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657895A (en) * | 2005-03-17 | 2005-08-24 | 大连理工大学 | On-line monitoring alarm device for leakage of water cooler |
| CN101836060A (en) * | 2007-10-23 | 2010-09-15 | 大金工业株式会社 | Fluid sensor, refrigerant leakage detection device, refrigeration device, and refrigerant leakage detection method |
| CN101718608A (en) * | 2009-11-03 | 2010-06-02 | 重庆山外山科技有限公司 | Electromagnetic valve leak detection system for blood purification |
| CN102290788A (en) * | 2011-08-08 | 2011-12-21 | 深圳市亚特尔科技有限公司 | Measurement protective device of submersible pump motor |
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