CN104865016A - Water detection type micro-channel coil pipe continuous leak detection method and device - Google Patents
Water detection type micro-channel coil pipe continuous leak detection method and device Download PDFInfo
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- CN104865016A CN104865016A CN201510337399.7A CN201510337399A CN104865016A CN 104865016 A CN104865016 A CN 104865016A CN 201510337399 A CN201510337399 A CN 201510337399A CN 104865016 A CN104865016 A CN 104865016A
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- 238000001514 detection method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 238000007667 floating Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000006260 foam Substances 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 4
- 230000008520 organization Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Abstract
The invention discloses a water detection type micro-channel coil pipe continuous leak detection method and device. The method comprises the following steps: in uncoiling and coiling process of the a micro-channel coil pipe, filling pressure gas into the micro-channel coil pipe, immersing the micro-channel coil pipe into a water tank, adopting a bubble detection method or a floating body position detection method to monitor leakage points, and then sending a signal to an identification mechanism. Through adoption of the technical scheme, continuous leak detection of the coil pipe with leakage defects is realized, and the leakage points are discovered and identified; when no detection equivalent limit exists, and detection and identification are accurate and correct; the operation is simple, the production efficiency is high, and the cost is low; the yield of the micro-channel coil pipe is increased from 70% to 95%, the leakage rate of the product is improved from 1-3% to 0.05-0.15%, and the economic benefits and social benefits cannot be estimated.
Description
Technical field
The present invention relates to a kind of impermeability leak hunting method and leakage detection apparatus thereof of microchannel coil.
Background technology
The process of current production microchannel coil has two kinds: one is conventional extrusion, and another kind is continuously extruded.Material due to production microchannel coil is aluminum and aluminum alloy mateial, and the process technology of domestic current raw materials also exists certain defect, so inside the primary aluminum blank of production microchannel coil, just there is the defect of gassiness, slag inclusion more or less.In production extrusion process, also can be with gas, be with slag to enter in product.
The production specification scope of microchannel coil is generally: (wide) 12 ~ 26 ㎜ × (height) 1 ~ 5 ㎜ × (wall thickness) 0.2 ~ 0.45 ㎜.Due to the wall thickness of microchannel coil very thin (average 0.3 ㎜), be easy to gassiness, the slag inclusion because of product, cause product bore a hole and leak.This is a kind of critical defect of micro-channel tubes, but the requirement of domestic evaporator producer to slip is 1 ~ 3%, and international requirement is 1 ~ 4 ‰.
In prior art, the impermeability leak hunting method of microchannel coil mainly contains two kinds:
1, inflated with nitrogen pressurize leak detection: after microchannel coil has been produced, by manually filling nitrogen pressurize to every Laying pipe, 12 hours dwell times.After 12 hours, see whether gauge pressure is still former data.As do not declined, just prove that this Laying pipe does not leak; As gauge pressure declines, then this Laying pipe has leakage.Current coil pipe slip is about 50%, and every Laying pipe is at about 80kg, and is its leakage point where? there is there several leakage point? all cannot identify and identify.Therefore, in order to ensure the slip that evaporator producer requires, can only entire volume scrap for there being the coil pipe of leakage point.Cause wasting huge (particularly spraying zinc pipe); In addition, this method dwell time is long, and operative's labour intensity is large, and is a segmentation operation, and production efficiency is low.
2, online vortex flow flaw detection leak detection: the on-line automatic flaw detection that such an approach achieves microchannel coil, and can defective position be identified.But the detection defects stoichiometric standard of this leak hunting method is 0.5 ㎜, and highest standard also only has 0.3 ㎜.So, if during the leakage defect hole < 0.3 ㎜ stoichiometric standard of micro-channel tubes, defectoscope just cannot detect, and causes undetected; In addition, after probe enters, upper and lower, the swing that left and right is multi-faceted of aluminium coil pipe, all likely cause high-frequency wrong report, cause very large waste.
Summary of the invention
In order to solve above-mentioned drawback, technical matters to be solved by this invention is, provides a kind of leak hunting method and leakage detection apparatus thereof of microchannel coil.Can significantly reduce on the basis of production cost, the slip of product is met the demands.In order to solve the problems of the technologies described above, the technical solution used in the present invention is, the continuous leak hunting method of water inspection formula microchannel coil, is characterized in that, comprise the steps:
The first step, microchannel coil is fixed on uncoiling mechanism, the termination of the microchannel coil opened is fixed on rolling-up mechanism by leakage detecting device, and at the end device tensimeter of microchannel coil;
Second step, inflate in microchannel coil, described manometric gauge pressure controls at 0.5 ~ 2.5Mpa;
3rd step, unlatching leakage detecting device, then open uncoiling mechanism and rolling-up mechanism, coiling speed controls at 8 ~ 16r/min; Leakage detecting device comprises tank, and the water temperature of tank controls within the scope of 60 ~ 100 DEG C; The described microchannel coil by leakage detecting device is immersed in tank, the monitoring of leakage detecting device to leakage point be selected from following method one or both:
1) bubble detection method: the bubble that the gas for leakage point leakage is formed detects, at tank side device air-foam detector, after air-foam detector (as with the air-foam detector of induction mode and capacitive way work, optical sensing air-foam detector, ultrasonic sensing air-foam detector etc.) detects bubble, signal is sent to identification mechanism;
2) position of floating body detection method: be provided with floating buoyancy aid in the sink, when microchannel coil is passed through, the pressed gas that leakage point is revealed causes buoyancy aid to produce change in location, and signal is sent to identification mechanism after position of floating body change being detected by position detecting element (as electric contact or photoelectric probe);
After 4th step, identification mechanism (as coder or ink jet numbering machine) receive signal, according to the movement velocity of the Distance geometry microchannel coil with signal generating element, determine the deferred action period, after time delay completes, in microchannel coil, make mark.
The continuous leakage detection apparatus of water inspection formula microchannel coil, it is characterized in that, this device comprises uncoiling mechanism and rolling-up mechanism, the pressure gas organization of supply being communicated with microchannel coil of corresponding setting, arrange leakage detecting device and identification mechanism between described uncoiling mechanism and rolling-up mechanism, identification mechanism is positioned at leakage detecting device rear end (taking uncoiling mechanism as front); Identification mechanism is provided with deferred action assembly;
Described leakage detecting device comprises tank, is immersed in tank by the microchannel coil of leakage detecting device, the leakage point monitoring assembly of leakage detecting device be selected from following assembly one or both:
1) bubble detection components: comprise the air-foam detector of device at tank side, air-foam detector communication connection identity mechanism;
2) position of floating body detection components: comprise floating buoyancy aid in the sink, also comprise position of floating body detecting element, position of floating body detecting element communication connection identity mechanism.
Beneficial effect of the present invention is, adopts technique scheme, to there being the coil pipe of leakage defect to realize leak detection continuously, finding and identifying leakage point; Without detecting equivalent restriction, detect and identify accurate dynamic; Simple to operate, production efficiency is high, and cost is low; Make the yield rate of micro-channel tubes bring up to 95% by 70%, the slip of product brings up to 0.5 ~ 1.5 ‰ by 1 ~ 3%, and its economic benefit and social benefit cannot be estimated.
Preferably, described buoyancy aid be bowl structure back-off in the sink, buoyant means, on upper/lower guide, is provided with the breach passed through for microchannel coil bottom buoyancy aid.Effectively can improve detection accuracy.
Preferably, described buoyancy aid is spherically be fixed in rotating shaft, and rotating shaft is affixed indicator elment also, and indicator elment is corresponding with position of floating body detecting element to be arranged.The pressed gas that leakage point is revealed acts on buoyancy aid, or formation water level fluctuation, cause buoyancy aid to produce change in location and drive rotating shaft to rotate, rotating shaft drives indicator elment to rotate, the change in location of indicator elment catch by position of floating body detecting element, signal is sent to identification mechanism.Action is accurate, is detected as power high.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Accompanying drawing explanation
Fig. 1 is the specific embodiment of the invention 1 one-piece construction schematic diagram;
Fig. 2 is embodiment 1 leakage detecting device structural representation (in figure, tank sidewall is provided with indentation, there to show the breach 603 of buoyancy aid 601);
Fig. 3 is embodiment 2 position of floating body detection components structural representation (in figure, tank sidewall is provided with indentation, there to show buoyancy aid 103).
Embodiment
Embodiment 1: see accompanying drawing 1,2, reflects a kind of concrete structure of the present invention, the continuous leakage detection apparatus of described water inspection formula microchannel coil, and comprise uncoiling mechanism 3 and the rolling-up mechanism 9 of corresponding setting, uncoiling mechanism 3 comprises angle sheave 2.The end device tensimeter 10 of the microchannel coil 4 on rolling-up mechanism 9.Pressure gas organization of supply 1 is communicated with the termination of microchannel coil 4 by rotating seal 11, nitrogen injection in microchannel coil 4, arrange leakage detecting device and identification mechanism 8 between described uncoiling mechanism 3 and rolling-up mechanism 9, leakage detecting device comprises tank 7, bubble detection components 5 and position of floating body detection components 6.
Be immersed in tank 7 by the microchannel coil 4 of leakage detecting device, tank 7 two ends are provided with coil pipe import 12 and coil outlets 14 is equipped with seal element 13.In this example, the leakage point monitoring assembly of leakage detecting device comprises bubble detection components 5 and position of floating body detection components 6.Also a use can be selected in practice.
Bubble detection components 5 comprises the air-foam detector of device at tank 7 side, and the bubble that the gas for leakage point leakage is formed detects.The ink jet numbering machine of air-foam detector communication connection identity mechanism 8, sends to ink jet numbering machine by signal after bubble being detected.
Position of floating body detection components 6 comprises the buoyancy aid 601 swimming in fixed position in tank 7, in this example, buoyancy aid 601 is in the bowl structure tipped upside down in tank 7, and buoyancy aid 601 in upper/lower guide 602, is provided with the breach 603 passed through for microchannel coil 4 by connecting component apparatus bottom buoyancy aid 601.Microchannel coil 4 by time, the pressed gas that leakage point is revealed acts on buoyancy aid 601, or forms water level fluctuation, cause buoyancy aid 601 vertically guide rail 602 produce change in location in short transverse.
Position of floating body detection components 6 also comprises buoyancy aid height and position detecting element 604, adopts photoelectric probe in this example.The ink jet numbering machine of buoyancy aid height and position detecting element 604 communication connection identity mechanism 8, sends to ink jet numbering machine by signal after the change in location of buoyancy aid 601 being detected.
Described buoyancy aid height and position detecting element 604 also can arrange two electric contacts at correspondence position, and one of electric contact moves up and down with buoyancy aid 601, and when buoyancy aid 601 raises by gas leakage effect, two closings of contact send signal.
Identification mechanism 8 adopts ink jet numbering machine, is positioned at leakage detecting device rear end (taking uncoiling mechanism as front); Identification mechanism 8 is provided with deferred action assembly, after the signal receiving bubble detection components 5 or position of floating body detection components 6, according to the movement velocity of the Distance geometry microchannel coil 4 of code spraying machine shower nozzle and signal generating element (i.e. bubble detection components 5 or position of floating body detection components 6), determine the deferred action period, ink jet numbering machine action after time delay completes, by this section of microchannel coil 4 of shower nozzle makes mark.When following process, operating personnel or equipment can abandon identification section exactly.
Embodiment 2: see Fig. 3, difference from Example 1 is, the leakage point monitoring assembly of leakage detecting device only have employed position of floating body detection components.Position of floating body detection components comprises the buoyancy aid 103 swum in tank 101, also comprises position of floating body detecting element 105, position of floating body detecting element 105 communication connection identity mechanism.
Described buoyancy aid 103 is fixed in rotating shaft 102 in spherical.Rotating shaft 102 also by the affixed indicator elment 104 of connecting rod, suitably sets length of connecting rod, can regulate sensitivity.Indicator elment 104 is corresponding with position of floating body detecting element 105 to be arranged.The pressed gas that leakage point is revealed acts on buoyancy aid 103, or formation water level fluctuation, causing buoyancy aid 103 to produce change in location drives rotating shaft 102 to rotate, rotating shaft 102 drives indicator elment 104 to rotate, the change in location of indicator elment 104 catch by position of floating body detecting element 105, signal is sent to identification mechanism.
The above-mentioned implementation that the present invention describes is only in order to technical scheme of the present invention is clearly described, and can not be interpreted as and make any restriction to the present invention.The present invention has known multiple alternative or distortion in the art, under the prerequisite not departing from essential meaning of the present invention, all falls into protection scope of the present invention.
Claims (4)
1. the continuous leak hunting method of water inspection formula microchannel coil, is characterized in that, comprise the steps:
The first step, microchannel coil is fixed on uncoiling mechanism, the termination of the microchannel coil opened is fixed on rolling-up mechanism by leakage detecting device, and at the end device tensimeter of microchannel coil;
Second step, inflate in microchannel coil, described manometric gauge pressure controls at 0.5 ~ 2.5Mpa;
3rd step, unlatching leakage detecting device, then open uncoiling mechanism and rolling-up mechanism, coiling speed controls at 8 ~ 16r/min; Leakage detecting device comprises tank, and the water temperature of tank controls within the scope of 60 ~ 100 DEG C; The described microchannel coil by leakage detecting device is immersed in tank, the monitoring of leakage detecting device to leakage point be selected from following method one or both:
1) bubble detection method: the bubble that the gas for leakage point leakage is formed detects, at tank side device air-foam detector, after air-foam detector (as with the air-foam detector of induction mode and capacitive way work, optical sensing air-foam detector, ultrasonic sensing air-foam detector etc.) detects bubble, signal is sent to identification mechanism;
2) position of floating body detection method: be provided with floating buoyancy aid in the sink, when microchannel coil is passed through, the pressed gas that leakage point is revealed causes buoyancy aid to produce change in location, and signal is sent to identification mechanism after position of floating body change being detected by position detecting element (as electric contact or photoelectric probe);
After 4th step, identification mechanism (as coder or ink jet numbering machine) receive signal, according to the movement velocity of the Distance geometry microchannel coil with signal generating element, determine the deferred action period, after time delay completes, in microchannel coil, make mark.
2. the continuous leakage detection apparatus of water inspection formula microchannel coil, it is characterized in that, this device comprises uncoiling mechanism and rolling-up mechanism, the pressure gas organization of supply being communicated with microchannel coil of corresponding setting, arrange leakage detecting device and identification mechanism between described uncoiling mechanism and rolling-up mechanism, identification mechanism is positioned at leakage detecting device rear end; Identification mechanism is provided with deferred action assembly;
Described leakage detecting device comprises tank, is immersed in tank by the microchannel coil of leakage detecting device, the leakage point monitoring assembly of leakage detecting device be selected from following assembly one or both:
1) bubble detection components: comprise the air-foam detector of device at tank side, air-foam detector communication connection identity mechanism;
2) position of floating body detection components: comprise floating buoyancy aid in the sink, also comprise position of floating body detecting element, position of floating body detecting element communication connection identity mechanism.
3. the continuous leakage detection apparatus of water inspection formula microchannel coil as claimed in claim 2, is characterized in that, described buoyancy aid be bowl structure back-off in the sink, buoyant means, on upper/lower guide, is provided with the breach that confession microchannel coil is passed through bottom buoyancy aid.
4. the continuous leakage detection apparatus of water inspection formula microchannel coil as claimed in claim 2, is characterized in that, described buoyancy aid is spherically be fixed in rotating shaft, and rotating shaft is affixed indicator elment also, and indicator elment is corresponding with position of floating body detecting element to be arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510337399.7A CN104865016B (en) | 2015-06-17 | 2015-06-17 | Water examines the continuous leak hunting method of formula microchannel coil and its leakage detection apparatus |
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| CN201510337399.7A CN104865016B (en) | 2015-06-17 | 2015-06-17 | Water examines the continuous leak hunting method of formula microchannel coil and its leakage detection apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108132125A (en) * | 2017-11-23 | 2018-06-08 | 吕从祥 | A kind of vehicle electronic control unit housing seal test method and sealing test instrument |
| CN109682545A (en) * | 2018-12-06 | 2019-04-26 | 王伟波 | A kind of leak test plant of heat exchanger coil |
| CN109696280A (en) * | 2018-12-06 | 2019-04-30 | 王伟波 | A kind of heat exchanger side goes out coil pipe gas leak detection device |
| CN109738113A (en) * | 2018-12-25 | 2019-05-10 | 西安交通大学 | Pressure test method in a kind of microchannel based on microbubble |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108132125A (en) * | 2017-11-23 | 2018-06-08 | 吕从祥 | A kind of vehicle electronic control unit housing seal test method and sealing test instrument |
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| CN109682545A (en) * | 2018-12-06 | 2019-04-26 | 王伟波 | A kind of leak test plant of heat exchanger coil |
| CN109696280A (en) * | 2018-12-06 | 2019-04-30 | 王伟波 | A kind of heat exchanger side goes out coil pipe gas leak detection device |
| CN109738113A (en) * | 2018-12-25 | 2019-05-10 | 西安交通大学 | Pressure test method in a kind of microchannel based on microbubble |
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| Publication number | Publication date |
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| CN104865016B (en) | 2017-09-29 |
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Address after: 410600 three ring road, Ningxiang economic and Technological Development Zone, Changsha, Hunan Co-patentee after: ZUNYI HENG JIA ALUMINUM Co.,Ltd. Patentee after: HUNAN HENGJIA NEW MATERIAL TECHNOLOGY CO.,LTD. Address before: 410600 three ring road, Ningxiang economic and Technological Development Zone, Changsha, Hunan Co-patentee before: ZUNYI HENG JIA ALUMINUM Co.,Ltd. Patentee before: HUNAN HENG JIA ALUMINUM Co.,Ltd. |
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Denomination of invention: Continuous leak detection method and device for water inspection microchannel coil Effective date of registration: 20210126 Granted publication date: 20170929 Pledgee: Ningxiang Hunan rural commercial bank Limited by Share Ltd. Pledgor: HUNAN HENGJIA NEW MATERIAL TECHNOLOGY Co.,Ltd. Registration number: Y2021110000001 |
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Denomination of invention: Continuous leak detection method and leak detection device of water detection microchannel coil Effective date of registration: 20220426 Granted publication date: 20170929 Pledgee: Hunan Xingsha Rural Commercial Bank Co.,Ltd. Ansha sub branch Pledgor: HUNAN HENGJIA NEW MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2022980004798 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20170929 Pledgee: Hunan Xingsha Rural Commercial Bank Co.,Ltd. Ansha sub branch Pledgor: HUNAN HENGJIA NEW MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2022980004798 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Continuous leak detection method and leak detection device for water detection microchannel coils Granted publication date: 20170929 Pledgee: Hunan Xingsha Rural Commercial Bank Co.,Ltd. Ansha sub branch Pledgor: HUNAN HENGJIA NEW MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2024980012617 |