CN104482994A - Mass method/standard meter method micro-flow water flow standard device - Google Patents
Mass method/standard meter method micro-flow water flow standard device Download PDFInfo
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- CN104482994A CN104482994A CN201410686590.8A CN201410686590A CN104482994A CN 104482994 A CN104482994 A CN 104482994A CN 201410686590 A CN201410686590 A CN 201410686590A CN 104482994 A CN104482994 A CN 104482994A
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Abstract
The invention relates to a mass method/standard meter method micro-flow water flow standard device. The device comprises a water storage tank which is connected with the lower end of a surge tank through a water pump, a high-level water tank is connected with the surge tank, the surge tank and the high-level water tank are connected with a front detected-meter header of a horizontal detected-flow-meter placement pipeline through electric switching valves respectively, the front detected-meter header is connected with two horizontal expansion joints in parallel, detected flow meters with different calibers are installed through the horizontal expansion joints, the two horizontal expansion joints gather on a front standard meter header, three standard meters with different calibers are installed at the outlet of the front standard meter header and connected to a rear standard meter header, two vertical detected-flow-meter placement pipelines are connected through the rear standard meter header, detected flow meters can be installed on the vertical detected-flow-meter placement pipelines through vertical expansion joints, three redirectors with different calibers are arranged at the tail ends of the two vertical detected-flow-meter placement pipelines in a connected mode, and one water outlet of each redirector corresponds to a weighing container.
Description
Technical field
The invention belongs to liquid flowmeter calibrating field, particularly relate to a kind of mass method/method of standard table tiny flow quantity water flow standard apparatus.
Background technology
The basic composition of existing water flow standard apparatus has water circulation system (pond, water pump, pressurizing vessel or water tower), gas-removing filter, experiment pipeline, expansion bend, standard scale or quality weighing system, commutator, on off control equipment and computing machine composition.On request tested flowmeter is installed on device, start said system, make the tested flowmeter of water flow path and flow working stamndard (electronic scale or standard scale), the tested flowmeter of synchronous operation and flow working stamndard, output stream value relatively, the stability of water circulation system, the accuracy of commutator, thus determine the accuracy of measuring and the repeatability of tested flowmeter.Complete the calibrating to tested flowmeter.But existing water flow standard apparatus has problems in the accuracy of measuring and repeatability.
Summary of the invention
For above shortcomings part in prior art, water circulation system is the object of the present invention is to provide to stablize and the mass method that accuracy is high and anti-interference degree the is high/method of standard table tiny flow quantity water flow standard apparatus of flow working stamndard.
A kind of mass method/method of standard table tiny flow quantity water flow standard apparatus, this device comprises reserve tank, buffer tank, elevated tank, pipeline placed by horizontal tested flowmeter, pipeline placed by vertical tested flowmeter, wherein, reserve tank is connected to the lower end of buffer tank by a water pump, elevated tank is arranged on tested flowmeter and places 4 ~ 6m place above pipeline, the water inlet pipe of elevated tank connects buffer tank by electric switching valve, the rising pipe of buffer tank and the rising pipe of elevated tank are connected to horizontal tested flowmeter respectively by electric switching valve and place before the tested table of pipeline on header, header parallel join two-way horizontal type telescopic device before tested table, the tested flowmeter of different bore is installed by horizontal type telescopic device, two-way horizontal type telescopic device to converge in before standard scale on header respectively by manual modulation valve, before standard scale, the outlet of header is set side by side with the standard scale of the different bore in three tunnels, the water delivering orifice of three road standard scales to be connected to after standard scale on header, connect the vertical tested flowmeter of two-way by header after standard scale and place pipeline, the vertical tested flowmeter of two-way to be placed on pipeline by vertical expansion bend for installing tested flowmeter, the end that pipeline placed by the vertical tested flowmeter of two-way is connected with header before an electronic scale, before electronic scale, the outlet of header is set side by side with the steering gear of the different bore in three tunnels, electric switching valve is provided with between header before steering gear and electronic scale, one water delivering orifice of steering gear is corresponding with weighing container, weighing container is arranged on electronic scales.
Further, electronic scales periphery arranges windproof outer cover, and weighing container is designed to liquidproof Steaming structure.
Further, the bore of three steering gears is respectively 4mm, 10mm and 15mm.
Further, the bore of three road standard scales is 2mm, 10mm, 15mm respectively.
Further, water pump controls rotating speed by a frequency changer circuit.
Further, the electric switching valve in device is controlled by computer control system.
Further, steering gear comprises into water short tube, 90 ° of tubes, needle-based nozzle, photoimpact signal converter and mini cylinder, described water inlet short tube is flexibly connected by the tube of flange bearing with same diameter, 90 ° of tube other end connecting needle hair style nozzles, water (flow) direction right angle is changed, steering gear is by Flange joint photoimpact signal converter and a runners, runners is arranged mini cylinder, the output shaft of mini cylinder is hinged with the web joint be fixed on tube by jointing, 90 ° of tubes are also provided with photoelectricity baffle plate, by the rotation of photoelectricity baffle plate in photoimpact signal converter, determine once to commutate.
Compared with prior art, beneficial effect is in the present invention:
1, adopt elevated tank originally in the present invention, when low discharge, avoid the current adopting separately buffer tank to cause unstable, occur the problem of swimming.
2, adopt the present invention, by controlling electric switching valve, select different paths, make to detect the measurement realizing multi-path polytypic flowmeter, and the accuracy of the stability of water circulation system and flow working stamndard and anti-interference degree being improved.
3, commutator relative standard uncertainty is better than 0.025%, the ingenious part of structure, is to have employed according to there being guide functions, and in the tube of water inlet short tube same diameter and the needle-based nozzle of below thereof.Water can not be remained in commutator, agilely rapidly can complete commutation, thus effectively ensure that the relative standard uncertainty of commutator.Another feature of structure is that structure is simple, small and exquisite, is convenient to install.
4, the confirmation that effect is carried out in three groups of experiments has been done in the present invention:
A, with 50L buffer tank coordinate DN15 commutator (bore is 15mm), calibrating flow be 0.5 ~ 10 point in 1 ~ 16.67L/min, calibrating time, its device discharge stability is better than 0.1%;
B, with 50L buffer tank coordinate DN10 commutator (bore is 10mm), calibrating flow be 1 ~ 12 point in 0.0083 ~ 0.1L/min, calibrating time.Its device discharge stability is better than 0.1%;
C, use 50L buffer tank series connection 20L elevated tank coordinate the pneumatic commutator of DN2 oscillating nozzle formula, and calibrating flow is 1 ~ 12 point in 0.16 ~ 0.0016L/min, calibrating time.Its its device discharge stability is better than 0.05%;
The precision of voltage regulation of buffer tank is generally 0.1%, the precision of voltage regulation of elevated tank generally also can reach 0.05%, be generally the pressurizing vessel of 0.1% with the precision of voltage regulation for one-level source of stable pressure, then precision of pressurizeing to be generally 0.05% elevated tank be secondary voltage stabilizing, the overall precision of voltage regulation can be improved.
Accompanying drawing explanation
Fig. 1 is the apparatus structure simplified schematic diagram that the embodiment of the present invention provides;
Fig. 2 is the apparatus structure schematic front view that the embodiment of the present invention provides;
Fig. 3 is the apparatus structure diagrammatic top view that the embodiment of the present invention provides;
Fig. 4 is the structural representation of the device commutator that the embodiment of the present invention provides;
Wherein, 1 is reserve tank, 2 is switch valve, 3 is filtrator, 4 is water pump, 5 is non-return valve, 6 is electronic scale bracket, 7 is buffer tank, 8 is elevated tank, 9 is electric switching valve, 10 is tested flowmeter, 11 is horizontal type telescopic device, 12 is standard scale, 13 is manual modulation valve, 14 is vertical expansion bend, 15 is commutator, 16 is weighing container, 17 is articulation, 18 is expansion bend support, 19 is relief tube, 20 is flexible coupling, 21 is rising pipe, 22 for being picked up the front header of table, 23 is interchangeable straight length before table, 24 is interchangeable flange, 25 is header before standard scale, 26 is header after standard scale, 27 is header before electronic scale, 201 is water inlet short tube, 202 is circlip, 203 is tube support set, 204 is photoimpact signal converter, 205 is photoelectricity baffle plate, 206 is 90 ° of tubes, 207 is web joint, 208 needle-based nozzles, 209 is runners, 210 cylinder support seats, 211 is mini cylinder, 212 is linkage connector, 213 is locking head pedestal, 214 is bearing pin.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment
As shown in Figures 1 to 3, a kind of mass method/method of standard table tiny flow quantity water flow standard apparatus, this device comprises reserve tank 1, buffer tank 7, elevated tank 8, pipeline placed by horizontal tested flowmeter, pipeline placed by vertical tested flowmeter, wherein, the water delivering orifice of reserve tank 1 connects a water pump 4 by switch valve 2 and filtrator 3, water pump junction adopts around property joint 20, water pump 4 is connected to the lower end of buffer tank 7 by non-return valve 5, buffer tank 7 forms loop by a relief tube 19 with reserve tank, relief tube 19 arranges electric switching valve 9, elevated tank 8 is arranged on tested flowmeter and places 5m place above pipeline, the water inlet pipe of elevated tank 8 connects buffer tank 7 by an electric switching valve, upper water is carried out by buffer tank 7, the rising pipe 21 of buffer tank 7 and the rising pipe of elevated tank 8 are connected to horizontal tested flowmeter respectively by electric switching valve and place before the tested table of pipeline on header 22, two-way is divided into by header 22 before tested table, two line structures are identical, each road all controls respectively by an electric switching valve, for a road, first be connected with the front interchangeable straight length 23 of table, before table, the other end of interchangeable straight length 23 is connected with interchangeable flange 24, the telescopic end of one horizontal type telescopic device 11 is provided with interchangeable flange, between two interchangeable flanges, tested flowmeter 10 is installed, header 25 before connection standard table after the water delivering orifice connection electric switching valve of tested flowmeter 10, three tunnels are divided into by header before standard scale 25, each Lu Zhongjun is by electric switching valve connection standard table 12.In the present embodiment, the bore of three road standard scales is 2mm, 10mm, 15mm respectively, meets the measurement that model is the flowmeter between DN2 ~ DN10.
Three road standard scales 12 are respectively by header 26 after manual modulation valve 13 connection standard table, pipeline placed by the vertical tested flowmeter that after standard scale, header 26 connects two-way arranged side by side, the tested flowmeter 10 pipeline connecting respectively different bore placed by the vertical tested flowmeter of two-way, tested flowmeter 10 is fixed by pneumatic vertical expansion bend 14, pneumatic vertical expansion bend 14 is arranged on expansion bend support 18, header 27 before the rear end connection electronic scales of the vertical tested flowmeter placement pipeline that two-way is arranged side by side, before electronic scales, header 27 offers three way outlets, three way outlets arrange electric switching valve respectively, by electric switching valve respectively by articulation 17 and the steering gear 15 being connected the different bores corresponding from tested flowmeter by articulation 28 with pvc flexible pipe 17, the corresponding corresponding electronic scales 16 of one road water delivering orifice of the steering gear 15 of different bore, another road water delivering orifice aims at reserve tank 1, .The water delivering orifice diameter of three steering gears 15 is respectively 4mm, 10mm and 15mm.
Water pump controls rotating speed by frequency changer circuit.The switch of all electric switching valves in device is controlled by computer control system.
As shown in Figure 4, steering gear comprises into water short tube 201, 90 ° of tubes 206, needle-based nozzle 208, photoimpact signal converter 204 and mini cylinder 211, one end of water inlet short tube 201 is by locking head pedestal 213, tight head nut connection moving joint pvc flexible pipe, the other end of water inlet short tube 201 is flexibly connected with 90 ° of tubes 206 by flange and circlip 202, 90 ° of tube 206 other end connecting needle hair style nozzles 208, water (flow) direction right angle is changed, steering gear connects photoimpact signal converter 204 and runners 209 by flange is symmetrical up and down, one end of runners 209 arranges cylinder supports seat 210, cylinder supports seat 210 is arranged mini cylinder 211, the output shaft of mini cylinder 211 is hinged by bearing pin 214 with the web joint 207 be fixed on 90 ° of tubes by jointing 212, by mini cylinder 211, drive web joint 207, commutator needle-based nozzle 208 is rotated current are converted certain angle discharge.90 ° of tubes 206 are also provided with photoelectricity baffle plate 205, when commutator needle-based nozzle 208 turns to centre position by photoelectricity baffle plate 205 shading light electric pulse signal converter 204, send pulse signal to PLC to have determined once to commutate.Mini cylinder 211 take pressurized air as power, controls elastic by 25 electric change valves (24V is automatically controlled).
The course of work in the present embodiment is: by water pump 4, by the water suction buffer tank 7 in reserve tank 1, (wherein flexible coupling 20 is that water pump damping is used.Non-return valve for protection water pump with) again by rising pipe 21, enter picked up table before header, the front interchangeable straight length of table, interchangeable flange pass through again " tested flowmeter " horizontal type telescopic device (the tested flowmeter of clamping) open electric switching valve before 9 standard scales header to standard scale; Regulate manual adjustments valve regulating flow size.Again to header, pvc flexible pipe before header, electronic scale after standard scale to commutator.Entering weighing container 16 makes commutator action that water is flow back to reserve tank 11 by a point bucket to set volume (signal gathered by PLC); Gather tested flowmeter volume simultaneously, the density of water is measured again by the weight that electronic scale weighing enters water in weighing container 16, be converted into volume and tested flowmeter volumetric ratio comparatively, the accuracy of tested flowmeter is calculated by software, complete and once examine and determine operation, electronic scales is arranged on the electronic scales bracket 6 of reserve tank.
In the present embodiment, can detect for the flowmeter of different model bore, detected flowmeter can be DN10, DN8, DN6, DN4 and DN2, when the horizontal detection of needs, the pneumatic vertical expansion bend of two-way adopts pipeline to connect, when needs vertical check, two-way horizontal type telescopic device adopts pipeline to connect, when detecting, by controlling the selection of electrically operated valve realization to path.
Such as, detected flowmeter bore is 10mm, adopt vertical detection, now, two-way horizontal type telescopic device adopt pipeline to connect, by controlling electric switching valve, according to the difference of calibrating flow, change different patterns, independent employing buffer tank or elevated tank, or adopt the form of buffer tank or elevated tank combination, and according to the requirement of flow control electric switching valve to three road standard scales and selected by the carrying out of steering gear select, done the contrast that effect is carried out in three groups of experiments in the present embodiment:
A, with 50L buffer tank coordinate DN15 commutator (bore is 15mm), calibrating flow be 0.5 ~ 10 point in 1 ~ 16.67L/min, calibrating time, its device discharge stability is better than 0.1%;
B, with 50L buffer tank coordinate DN10 commutator (bore is 10mm), calibrating flow be 1 ~ 12 point in 0.0083 ~ 0.1L/min, calibrating time.Its device discharge stability is better than 0.1%;
C, use 50L buffer tank series connection 20L elevated tank coordinate the pneumatic commutator of DN2 oscillating nozzle formula, and calibrating flow is 1 ~ 12 point in 0.16 ~ 0.0016L/min, calibrating time.Its device discharge stability is better than 0.05%;
The precision of voltage regulation of buffer tank is generally 0.1%, the precision of voltage regulation of elevated tank generally also can reach 0.05%, be generally the pressurizing vessel of 0.1% with the precision of voltage regulation for one-level source of stable pressure, then precision of pressurizeing to be generally 0.05% elevated tank be secondary voltage stabilizing, the overall precision of voltage regulation can be improved.
Its commutator relative standard uncertainty is better than 0.025%, it mainly intake short tube, tube and commutator needle-based nozzle composition.Job order is that current are flow to by short tube of intaking, and flows out from needle-based nozzle through tube, then through being located at the water trap above weighing container, realizes commutation, enters corresponding weighing container and weighs.
The ingenious part of this structure, is to have employed according to there being guide functions, and in the tube of water inlet short tube same diameter and the needle-based nozzle of below thereof.Water can not be remained in commutator, agilely rapidly can complete commutation, thus effectively ensure that the relative standard uncertainty of commutator.
Another feature of this structure is that structure is simple, small and exquisite, is convenient to install.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. mass method/method of standard table tiny flow quantity water flow standard apparatus, it is characterized in that, this device comprises reserve tank, buffer tank, elevated tank, pipeline placed by horizontal tested flowmeter, pipeline placed by vertical tested flowmeter, wherein, reserve tank is connected to the lower end of buffer tank by a water pump, elevated tank is arranged on tested flowmeter and places 4 ~ 6m place above pipeline, the water inlet pipe of elevated tank connects buffer tank by electric switching valve, the rising pipe of buffer tank and the rising pipe of elevated tank are connected to horizontal tested flowmeter respectively by electric switching valve and place before the tested table of pipeline on header, header parallel join two-way horizontal type telescopic device before tested table, the tested flowmeter of different bore is installed by horizontal type telescopic device, two-way horizontal type telescopic device to converge in before standard scale on header respectively by manual modulation valve, before standard scale, the outlet of header is set side by side with the standard scale of the different bore in three tunnels, the water delivering orifice of three road standard scales to be connected to after standard scale on header, connect the vertical tested flowmeter of two-way by header after standard scale and place pipeline, the vertical tested flowmeter of two-way to be placed on pipeline by vertical expansion bend for installing tested flowmeter, the end that pipeline placed by the vertical tested flowmeter of two-way is connected with header before an electronic scale, before electronic scale, the outlet of header is set side by side with the steering gear of the different bore in three tunnels, electric switching valve is provided with between header before steering gear and electronic scale, one water delivering orifice of steering gear is corresponding with weighing container, weighing container is arranged on electronic scales.
2., according to mass method according to claim 1/method of standard table tiny flow quantity water flow standard apparatus, it is characterized in that, electronic scales periphery arranges windproof outer cover, and weighing container is designed to liquidproof Steaming structure.
3., according to mass method according to claim 1/method of standard table tiny flow quantity water flow standard apparatus, it is characterized in that, the bore of three steering gears is respectively 4mm, 10mm and 15mm.
4. according to mass method according to claim 1/method of standard table tiny flow quantity water flow standard apparatus, it is characterized in that, the bore of three road standard scales is 2mm, 10mm, 15mm respectively.
5. according to mass method according to claim 1/method of standard table tiny flow quantity water flow standard apparatus, it is characterized in that, water pump controls rotating speed by a frequency changer circuit.
6., according to mass method according to claim 1/method of standard table tiny flow quantity water flow standard apparatus, it is characterized in that, the electric switching valve in device is controlled by computer control system.
7. according to mass method according to claim 1/method of standard table tiny flow quantity water flow standard apparatus, it is characterized in that, described steering gear comprises into water short tube, 90 ° of tubes, needle-based nozzle, photoimpact signal converter and mini cylinder, described water inlet short tube is flexibly connected by the tube of flange bearing with same diameter, 90 ° of tube other end connecting needle hair style nozzles, water (flow) direction right angle is changed, steering gear is by Flange joint photoimpact signal converter and a runners, runners is arranged mini cylinder, the output shaft of mini cylinder is hinged with the web joint be fixed on tube by jointing, 90 ° of tubes are also provided with photoelectricity baffle plate, by the rotation of photoelectricity baffle plate in photoimpact signal converter, determine once to commutate.
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| CN105823533A (en) * | 2016-06-17 | 2016-08-03 | 宁波明泰流量设备有限公司 | Double-clock detecting method for flowmeter |
| CN106706082A (en) * | 2016-11-25 | 2017-05-24 | 上海市质量监督检验技术研究院 | Field service type standard meter method-based flow detection equipment |
| CN106768201A (en) * | 2016-12-27 | 2017-05-31 | 新乡航空工业(集团)有限公司 | Positive/negative-pressure plurality of nozzle-type flowmeter detecting system |
| CN108152530A (en) * | 2018-01-16 | 2018-06-12 | 西安市红会医院 | A kind of microtubule tachymeter and its speed-measuring method |
| CN108254044A (en) * | 2017-12-29 | 2018-07-06 | 丹东意邦计量仪器仪表有限公司 | A kind of intelligent Static mass method fluid flow modular system |
| CN109632056A (en) * | 2019-02-02 | 2019-04-16 | 江苏华海测控技术有限公司 | A kind of more flowmeters series connection calibration liquid device |
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| CN105823533A (en) * | 2016-06-17 | 2016-08-03 | 宁波明泰流量设备有限公司 | Double-clock detecting method for flowmeter |
| CN106706082A (en) * | 2016-11-25 | 2017-05-24 | 上海市质量监督检验技术研究院 | Field service type standard meter method-based flow detection equipment |
| CN106768201A (en) * | 2016-12-27 | 2017-05-31 | 新乡航空工业(集团)有限公司 | Positive/negative-pressure plurality of nozzle-type flowmeter detecting system |
| CN106768201B (en) * | 2016-12-27 | 2023-05-23 | 新乡航空工业(集团)有限公司 | Positive-negative pressure multi-nozzle flowmeter detection system |
| CN108254044A (en) * | 2017-12-29 | 2018-07-06 | 丹东意邦计量仪器仪表有限公司 | A kind of intelligent Static mass method fluid flow modular system |
| CN108152530A (en) * | 2018-01-16 | 2018-06-12 | 西安市红会医院 | A kind of microtubule tachymeter and its speed-measuring method |
| CN109632056A (en) * | 2019-02-02 | 2019-04-16 | 江苏华海测控技术有限公司 | A kind of more flowmeters series connection calibration liquid device |
| CN109632056B (en) * | 2019-02-02 | 2022-07-12 | 江苏华海测控技术有限公司 | Liquid calibration device with multiple flowmeters connected in series |
| CN109916478A (en) * | 2019-03-26 | 2019-06-21 | 银川融神威自动化仪表厂(有限公司) | A kind of calibration of discharge coefficient, meter proof method and normal flow device |
| CN110553702A (en) * | 2019-08-15 | 2019-12-10 | 重庆市伟岸测器制造股份有限公司 | flowmeter calibration combined system |
| CN110567563A (en) * | 2019-08-15 | 2019-12-13 | 重庆市伟岸测器制造股份有限公司 | multi-calibration-line flowmeter calibration system and calibration method based on same |
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| CN104482994B (en) | 2017-07-28 |
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