CN2859465Y - Strain target-type flowmeter - Google Patents

Strain target-type flowmeter Download PDF

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Publication number
CN2859465Y
CN2859465Y CN 200620051170 CN200620051170U CN2859465Y CN 2859465 Y CN2859465 Y CN 2859465Y CN 200620051170 CN200620051170 CN 200620051170 CN 200620051170 U CN200620051170 U CN 200620051170U CN 2859465 Y CN2859465 Y CN 2859465Y
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China
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strain
force sensor
type force
overload
cylindrical shell
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CN 200620051170
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Chinese (zh)
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熊焕祈
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Individual
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Individual
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Abstract

This utility model discloses a strain type target type flowmeter, which is comprised by strained siganal generator, transmission rod, strain type force measurement sensor,sensor base seat, upper and down fixed seat,signal processing and displaying device. There arranged closed barriers in the cylindrical shell central section of strain type force measurement sensor, upon and under which are formed with blind holes, liquid in lower part of cylindrical shell can not permeate into upper part of cylindrical shell easily. It has eliminated the phenomenon thoroughly that strain gauges pasted on the wall are damaged due to the leakage reasons of untight sealing or vibration defect. strained siganal generator and the correspoding stress surface of fluid are designed as raised cambered surface shape which makes the signal are all stable. And this utility model replaces the arrangement of independent 4 strain gauge with double pieces twin unite strain group bridge arrangement. There still arranged overload protection device that can perform overload displaying protection when fluid rate exceeds limit measure. This utility model has simple structural, convenient installation, accurate measure, long durability, especially used for the flow rate measuring of corrosive liquid.

Description

The strain target type flowmeter
Technical field
The utility model relates to the flow instrument of a kind of fluid metering and observing and controlling, particularly a kind of electromechanical integration target type meter that adopts the strain-type force sensor measuring technique.
Background technology
Traditional target type meter, generally comprise stressed signal generator (being also referred to as the target sheet), transmit bar (being also referred to as the target bar), sensor, signal Processing and display device, sensor is made up of metal strain cylindrical shell and four foil gauges being located at cylinder inboard wall, transmitting bar is fixed in outside the cylindrical shell of sensor, and the lower end of transmitting bar is stretched in the fluid passage, and stressed signal generator is fixed in the lower end of transmitting bar.When fluid flows in pipeline, stressed signal generator is produced a thrust, this thrust produces a moment of flexure by transmitting being delivered in of bar on the metal strain cylindrical shell, be close to the bending stress that foil gauge on the metal strain cylindrical shell detects the metal strain cylindrical shell, strain signal converts the flowmeter digital display to and illustrates after signal Processing and display apparatus processes.This target type meter has following shortcoming:
1, stressed signal generator (target sheet) is plane tabular, and perpendicular to flow direction, the suffered impulse force of stressed signal generator during work, make the transmission bar that connects stressed signal generator produce one perpendicular to the radial frequency vibration source that flows to, not only influence the accuracy of testing result, and because of long-term vibration makes connecting portion loosening, even connecting fastening inefficacy, functional reliability is low.
2, the cylindrical shell of sensor generally is through hole, and the fastening transmission bar under the through hole must be connected and sealed, can cause this seal failure owing to vibration during work, fluid media (medium) just can infiltrate or enter and make the foil gauge operational failure in the cylindrical shell, influence the accuracy of testing result, same functional reliability is low, and is particularly poorer to the accuracy of the Measuring and testing of the fluid flow that is corrosive.
3, the foil gauge in the metal strain cylindrical shell is formed (as shown in Figure 1) by four foil gauges, make and be difficult to guarantee that it is leveled up and down, left-right symmetric is poor when installing, poor repeatability when the precision of bridge circuit signal output and work, and directly influence the precision of whole instrument.
Summary of the invention
The purpose of this utility model provides a kind of reliable operation, accuracy height, and the flow that can measure general liquid simple in structure, can measure the New Strain Type target type meter of the flow of the liquid that is corrosive again.
The technical solution of the utility model is such: the strain target type flowmeter, comprise stressed signal generator, transmission bar, strain-type force sensor, sensor pedestal, go up lower fixed seat, signal Processing and display device, strain-type force sensor is installed on the lower fixed seat by the sensor pedestal, signal Processing and display device are fixed on the upper fixed seat, strain-type force sensor comprises that the middle part has the sealing interlayer all to form the cylindrical shell and the foil gauge that is attached at this cylindrical shell upper side wall in the region between the heart and the diaphragm hole up and down, and foil gauge is connected with signal Processing and display device by lead; The transmission bar is fixed in the below of cylindrical shell, and stressed signal generator is anchored on the lower end of transmitting bar, and above-mentioned stressed signal generator and the corresponding stress surface of direction of flow are protruding arc surfaced.
The outside of above-mentioned strain-type force sensor is provided with overload protective device; this overload protective device side consistent with fluid flow direction is provided with and the corresponding rigidity overload of the lateral wall of above-mentioned strain-type force sensor limited block, and leaves appropriate gap between the lateral wall of this rigidity overload limited block and above-mentioned strain-type force sensor.
Side corresponding to above-mentioned strain-type force sensor on the above-mentioned rigidity overload limited block is provided with the overload detection probe, this overload detection probe touches on the lateral wall of above-mentioned strain-type force sensor, and this overload detection probe is connected with signal Processing and display device by lead.
Foil gauge in the above-mentioned strain-type force sensor adopts duplex foil gauge group, is attached at respectively on the two side of above-mentioned cylindrical shell.
After adopting such scheme, strain target type flowmeter of the present utility model, the corresponding stress surface of stressed signal generator and direction of flow is set to the arc surfaced of projection, make that the signal of stressed signal generator is uniform and stable, eliminated the suffered impulsive force of target sheet of former target type meter up hill and dale, effectively prevent the radially vibration back and forth of stressed signal generator, influence is metering accurately; And cylindrical shell and the through hole that transmits between the bar become blind hole, and like this, eliminated completely because of poorly sealed or vibration defective seepage and damaged the foil gauge that is affixed on the wall, improved the functional reliability of flowmeter.The metering of fluid flow is specially adapted to be corrosive.And the utility model becomes two with foil gauge from four, not only make the strain-type force sensor structure simpler, install more conveniently, the accuracy precision is higher.And the utility model also is provided with overload protection arrangement; when fluid flow surpasses upper limit measurement flow; the trace skew takes place in the stressed flow direction to fluid of strain-type force sensor; the strain-type force sensor outer wall triggers the overload detection probe; the signal of overload detection probe is through signal Processing and display device shows and teletransmission realizes reporting to the police and control; but and rigidity overload limited block limit strain formula force cell overmigrate also, play the effect of protection strain-type force sensor.
Description of drawings
Fig. 1 is the structural representation of the foil gauge of prior art
Fig. 2 is a structural representation of the present utility model
Fig. 3 is a strain-type force sensor middle cylinder body structural representation among Fig. 2
Fig. 4 is the structural representation of the utility model foil gauge
Embodiment
The utility model is a kind of strain target type flowmeter, shown in Fig. 2,3,4, comprises signal Processing and display device 1, last lower fixed seat 2, sensor pedestal 3, strain-type force sensor 4, transmits bar 5 and stressed signal generator 6.Last lower fixed seat 2 comprises upper fixed seat 21 and lower fixed seat 22, upper fixed seat 21 and lower fixed seat 22 link together by bolt, signal Processing and display device 1 are fixed on the upper fixed seat 21, lower fixed seat 22 is hollow form, sensor pedestal 3 is embedded at the inner chamber top of lower fixed seat 22, strain-type force sensor 4 is fixed on the sensor pedestal 3, strain-type force sensor 4 comprises cylindrical shell 41 and two foil gauges 42 that are attached on cylindrical shell 41 inwalls, foil gauge 42 is connected with signal Processing and display device 1 by lead, cylindrical shell 41 is provided with bottom 411, the top of transmitting bar 5 is fixedly connected on the bottom 411 of cylindrical shell 41, and cylindrical shell 41 is a blind hole structure with the connector that transmits bar 5.Stressed signal generator 6 is fixed in the lower end of transmitting bar 5, and stressed signal generator 6 is protruding arc surfaced with the corresponding stress surface of direction of flow.The outer ring of strain-type force sensor 4 is provided with the overload protection cover 7 that is fixed on the sensor pedestal 3; overload protection cover 7 medial surfaces consistent with the direction of direction of flow are provided with and the corresponding rigidity overload of the lateral wall of strain-type force sensor 4 limited block 71, leave appropriate gap between the outer wall of rigidity overload limited block 71 and strain-type force sensor 4.Side corresponding to strain-type force sensor 4 on the rigidity overload limited block 71 is provided with overload detection probe 72, overload detection probe 72 touches on the lateral wall of strain-type force sensor 4, and overload detection probe 72 is connected with signal Processing and display device 1 by lead.
Strain target type flowmeter of the present utility model, stressed signal generator 6 is set to protruding arc surfaced with the corresponding stress surface of direction of flow, make that the signal of stressed signal generator 6 is uniform and stable, eliminated the suffered impulsive force of target sheet of former target type meter up hill and dale, effectively prevent the radially vibration back and forth of stressed signal generator, influence is metering accurately; And cylindrical shell 41 and the through hole that transmits between the bar 5 become blind hole structure, like this, eliminated completely because of poorly sealed or vibration defective seepage and damaged the foil gauge 42 that is affixed on the wall, improved the functional reliability of flowmeter, the metering of the fluid flow that is specially adapted to be corrosive.And the utility model becomes two with foil gauge 4 from four, and more tube is single not only to make strain-type force sensor 4 structures, and installs more convenient.And the utility model also is provided with rigidity overload limited block 71 and overload detection probe 72; when fluid flow surpasses upper limit measurement flow; the trace skew takes place in strain-type force sensor 4 stressed flow directions to fluid; strain-type force sensor 4 outer walls trigger overload detection probe 72; the signal of overload detection probe 72 is through signal Processing and display device 1 shows and teletransmission realizes reporting to the police and control; but and rigidity overload limited block 71 limit strain formula force cell overmigrate also, play the effect of protection strain-type force sensor 4.

Claims (4)

1, a kind of strain target type flowmeter, form by stressed signal generator, transmission bar, strain-type force sensor, sensor pedestal, last lower fixed seat, signal Processing and display device, it is characterized in that: strain-type force sensor is installed on the lower fixed seat by the sensor pedestal, signal Processing and display device are fixed on the upper fixed seat, strain-type force sensor comprises that the middle part has the sealing interlayer all to form the cylindrical shell and the foil gauge that is attached at this cylindrical shell upper side wall in the region between the heart and the diaphragm hole up and down, and foil gauge is connected with signal Processing and display device by lead; The transmission bar is fixed in the below of cylindrical shell, and stressed signal generator is anchored on the lower end of transmitting bar, and above-mentioned stressed signal generator and the corresponding stress surface of direction of flow are protruding arc surfaced.
2, strain target type flowmeter according to claim 1; it is characterized in that: the outside of above-mentioned strain-type force sensor is provided with overload protective device; this overload protective device side consistent with fluid flow direction is provided with and the corresponding rigidity overload of the lateral wall of above-mentioned strain-type force sensor limited block, and leaves appropriate gap between the lateral wall of this rigidity overload limited block and above-mentioned strain-type force sensor.
3, strain target type flowmeter according to claim 2, it is characterized in that: the side corresponding to above-mentioned strain-type force sensor on the above-mentioned rigidity overload limited block is provided with the overload detection probe, this overload detection probe touches on the lateral wall of above-mentioned strain-type force sensor, and this overload detection probe is connected with signal Processing and display device by lead.
4, strain target type flowmeter according to claim 1 is characterized in that: the foil gauge in the above-mentioned strain-type force sensor adopts duplex foil gauge group, is attached at respectively on the two side of above-mentioned cylindrical shell.
CN 200620051170 2006-05-26 2006-05-26 Strain target-type flowmeter Expired - Lifetime CN2859465Y (en)

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Application Number Priority Date Filing Date Title
CN 200620051170 CN2859465Y (en) 2006-05-26 2006-05-26 Strain target-type flowmeter

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Application Number Priority Date Filing Date Title
CN 200620051170 CN2859465Y (en) 2006-05-26 2006-05-26 Strain target-type flowmeter

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CN2859465Y true CN2859465Y (en) 2007-01-17

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101750116A (en) * 2010-02-22 2010-06-23 泉州日新流量仪器仪表有限公司 Force-summing element used for flowmeter
CN101762297A (en) * 2010-02-22 2010-06-30 泉州日新流量仪器仪表有限公司 Sensing device for flow meter
CN101398318B (en) * 2007-09-24 2011-04-06 泉州日新流量仪器仪表有限公司 Momentum type effusion meter based on magnetic thrust and flow measurement method
WO2012101490A2 (en) 2010-12-31 2012-08-02 Ingegnerie Toscane S.R.L. A device for measuring the flowrate of a fluid
CN104501880A (en) * 2014-12-17 2015-04-08 福建恒劲科博测控技术有限公司 Flow meter
CN104567831A (en) * 2015-02-04 2015-04-29 西安科技大学 Easily precipitated water quality open channel flow measuring instrument and measurement method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101398318B (en) * 2007-09-24 2011-04-06 泉州日新流量仪器仪表有限公司 Momentum type effusion meter based on magnetic thrust and flow measurement method
CN101750116A (en) * 2010-02-22 2010-06-23 泉州日新流量仪器仪表有限公司 Force-summing element used for flowmeter
CN101762297A (en) * 2010-02-22 2010-06-30 泉州日新流量仪器仪表有限公司 Sensing device for flow meter
WO2012101490A2 (en) 2010-12-31 2012-08-02 Ingegnerie Toscane S.R.L. A device for measuring the flowrate of a fluid
CN104501880A (en) * 2014-12-17 2015-04-08 福建恒劲科博测控技术有限公司 Flow meter
CN104567831A (en) * 2015-02-04 2015-04-29 西安科技大学 Easily precipitated water quality open channel flow measuring instrument and measurement method thereof
CN104567831B (en) * 2015-02-04 2017-02-22 西安科技大学 Easily precipitated water quality open channel flow measuring instrument and measurement method thereof

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