CN107084768A - A kind of method for improving oval gear flowmeter measuring accuracy - Google Patents
A kind of method for improving oval gear flowmeter measuring accuracy Download PDFInfo
- Publication number
- CN107084768A CN107084768A CN201710337863.1A CN201710337863A CN107084768A CN 107084768 A CN107084768 A CN 107084768A CN 201710337863 A CN201710337863 A CN 201710337863A CN 107084768 A CN107084768 A CN 107084768A
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- CN
- China
- Prior art keywords
- encoder
- sender unit
- oval gear
- gear flowmeter
- amplifier
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
- G01F11/12—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
- G01F11/20—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates
- G01F11/22—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates for liquid or semiliquid
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of method for improving oval gear flowmeter measuring accuracy, it is to be arranged on an Encoder Multiplier on the sender unit of the oval gear flowmeter, the axle of encoder is connected with sender unit output shaft coaxial line by shaft coupling, the electric impulse signal that sender unit is sent is finely divided and amplified by Encoder Multiplier, and is shown with 4 20mA current remote transmissions to PLC control system or another display instrument.Same pulse signal before coding amplifier is installed additional just to be segmented with default multiplication factor N by encoder amplifier, the metering units of same flow signal just can greatly improve the measuring accuracy of oval gear flowmeter the 1/N before not amplifying measure and show, therefore install Encoder Multiplier additional.
Description
Technical field
The invention belongs to industrial flow field of measuring technique, and in particular to one kind subdivision oval gear flowmeter measurement signal
Metering units, the method to improve oval gear flowmeter measurement accuracy.
Background technology
Oval gear flowmeter is a kind of volumetric flowmeter, using mechanical measurement element the successive Ground Split of fluid
Into single known volume, gradually, repeatedly it is full of according to measuring room and discharges the number of times of the volume fractiion fluid come measurement stream
Measure volume total amount.Oval gear flowmeter can select the material manufactures such as cast iron, cast steel, 304 stainless steels, 316 stainless steels, it is adaptable to
The flow measurement of the industries such as chemical industry, oil, medicine, electric power, metallurgy and food.
Oval gear flowmeter is mainly by counter, sender unit, precise regulator, shaft coupling, support, protecgulum, ellipse
The parts such as Knucle-gear, housing, bonnet are constituted, and see Fig. 1.Housing, protecgulum and back shroud constitute a sealedly first moon shape cavity
It is used as the unit of account of a discharge capacity.When fluid to be measured enters moon shape cavity at the beginning of flowmeter through pipeline, the pressure between import and export
Difference promotes a pair of elliptic gears continuously to rotate, and the liquid after being measured through first moon shape cavity is constantly transported to exit, oval
The product of the revolution of gear and each four times of discharge capacity is the total amount of fluid to be measured flow.
Oval gear flowmeter flow measurement is measured by measuring the rotary speed of elliptic gear.There is display on the spot and remote
Pass two kinds of display.Show on the spot by the rotation of gear by a series of deceleration and adjustment rotating ratio mechanism after, directly and instrument
Indicator in surface plate is connected, and by the display of mechanical counter progress total amount.Teletransmission is shown mainly by slowing down
Rear gear drives permanent magnet rotation so that the contact of spring relay with permanent magnet identical speed synchronously
Closure disconnects, so as to send electric pulse teletransmission one by one to another display instrument.
Oval gear flowmeter measuring accuracy is high, it is adaptable to the measurement of high viscosity medium flow, usual elliptic gear flow
The precision of meter, up to 0.5 grade, is a kind of accurate flow-meter, but if when using measured medium flow mistake
Small, oval gear flowmeter instrument no longer can guarantee that enough measurement accuracy can cause measurement error, also cause less than 1L/min
Low discharge is difficult to measure.
The content of the invention
The present invention is on existing oval gear flowmeter, a pulse-code amplifier to be installed additional, after deceleration
Gear drive permanent magnet rotation produce the contact of spring relay electric impulse signal amplify according to actual needs
2-1000 times, and automatic control system is transmitted to 4-20mA signal, pulse signal metering units are added significantly to, list is improved
The precision of individual metering units, improves that to overcome flow small-pulse effect signal insensitive so that flowmeter for small flow measurement lower limit subtracts
It is small, so as to improve the measurement accuracy of oval gear flowmeter.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of oval gear flowmeter, as shown in figure 1, it is main by counter, sender unit, precise regulator, shaft coupling, support,
Protecgulum, elliptic gear, housing, bonnet and coding amplifier are constituted.The present invention is that an Encoder Multiplier is arranged on into described
Oval gear flowmeter sender unit on, the axle of encoder is connected with sender unit output shaft coaxial line by shaft coupling, transmitted
The electric impulse signal that device is sent is finely divided and amplified by Encoder Multiplier, and controls system to PLC with 4-20mA current remote transmissions
System or another display instrument are shown.A same pulse signal is just carried out by encoder amplifier with default multiplication factor N
Subdivision, the metering units of same flow signal just can be measured and shown with the 1/N before not amplifying, therefore install volume additional
The measuring accuracy of oval gear flowmeter is increased substantially after code device amplifier.
The beneficial effects of the invention are as follows：
One Encoder Multiplier is arranged on described oval gear flowmeter sender unit by the present invention, can realize elliptic gear
The significantly diminution of the flow measurement cell of flowmeter, it is achieved thereby that the flow measurement precision of oval gear flowmeter is significantly
Improve.
Brief description of the drawings
Fig. 1 is oval gear flowmeter structure of the invention and coding amplifier schematic view of the mounting position；
1. counter, 2. sender units, 3. precise regulators, 4. shaft couplings, 5. supports, 6. protecgulums, 7. elliptic gears, 8. housings,
9. bonnet, 10. Encoder Multipliers；
Fig. 2 installs teletransmission and displaying principle schematic diagram after coding amplifier additional for the oval gear flowmeter of the present invention.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings：
As shown in figure 1, oval gear flowmeter it is main by counter, sender unit, precise regulator, shaft coupling, support, protecgulum,
Elliptic gear, housing, bonnet and coding amplifier are constituted.The present invention is that an Encoder Multiplier 10 is arranged on into described hair
Believe on device, the axle of encoder is connected with the output shaft coaxial line of sender unit 2 by shaft coupling, the electric pulse letter that sender unit 2 is sent
Number it is finely divided and is amplified by Encoder Multiplier 10, and with 4-20mA current remote transmissions to PLC control system or another display instrument
Table is shown.Same pulse signal before coding amplifier 10 is installed additional just by encoder amplifier 10 with default multiplication factor N to be entered
Subdivision is gone, the metering units of same flow signal just can be measured and shown with the 1/N before not amplifying, therefore be installed additional
The measuring accuracy of oval gear flowmeter is increased substantially after the amplifier of encoder 10.Coding amplifier 10 is installed, is
On the end cap that coding amplifier 10 is installed to sender unit 2, it is ensured that the rotary shaft of coding amplifier 10 exists with the output shaft of sender unit 2
On same axis, and the rotary shaft and the output shaft of sender unit 2 of coding amplifier 10 are connected by supporting shaft coupling.
As shown in Fig. 2 the oval gear flowmeter of the present invention installs teletransmission and displaying principle signal after coding amplifier additional, by
The flow signal that oval gear flowmeter counter 1, precise regulator 3 and sender unit 2 are produced synchronously be transmitted to Encoder Multiplier
10, shown by Encoder Multiplier 10 with the teletransmission of 4-20mA current signals to PLC control system or another display instrument.Install volume additional
After code amplifier, originally live display portion can be continuing with, if necessary to the signal after display amplification, supporting need to install suitable additional
Suitable display instrument.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.
Claims (3)
1. a kind of method for improving oval gear flowmeter measuring accuracy, it is characterized in that, oval gear flowmeter is mainly by counting
Device, sender unit, precise regulator, shaft coupling, support, protecgulum, elliptic gear, housing, bonnet and coding amplifier are constituted；This hair
Bright is that an Encoder Multiplier is arranged on described oval gear flowmeter sender unit, by shaft coupling by encoder
Axle is connected with sender unit output shaft coaxial line, and the electric impulse signal that sender unit is sent is finely divided and put by Encoder Multiplier
Greatly, and with 4-20mA current remote transmissions shown to PLC control system or another display instrument；Install same arteries and veins before coding amplifier additional
Rush signal just to be segmented with default multiplication factor N by encoder amplifier, the metering units of same flow signal are just
It can measure and show with the 1/N before not amplifying, therefore install the metering of oval gear flowmeter after Encoder Multiplier additional
Precision is increased substantially.
2. a kind of method for improving oval gear flowmeter measuring accuracy as claimed in claim 1, it is characterized in that, coding amplification
Device install sender unit end cap on, and ensure coding amplifier rotary shaft and sender unit output shaft on the same axis, and
The rotary shaft of coding amplifier and the output shaft of sender unit are connected by supporting shaft coupling.
3. a kind of method for improving oval gear flowmeter measuring accuracy as claimed in claim 1, it is characterized in that, by oval tooth
The flow signal that flowmeters counter, precise regulator and sender unit are produced synchronously be transmitted to Encoder Multiplier, by encoder
Amplifier is with the teletransmission of 4-20mA current signals to PLC control system or display；Originally live display portion can be used, if needed
The signal after amplification is shown, supporting suitable display instrument need to be installed additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710337863.1A CN107084768A (en) | 2017-05-15 | 2017-05-15 | A kind of method for improving oval gear flowmeter measuring accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710337863.1A CN107084768A (en) | 2017-05-15 | 2017-05-15 | A kind of method for improving oval gear flowmeter measuring accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107084768A true CN107084768A (en) | 2017-08-22 |
Family
ID=59607688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710337863.1A Pending CN107084768A (en) | 2017-05-15 | 2017-05-15 | A kind of method for improving oval gear flowmeter measuring accuracy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107084768A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2662202Y (en) * | 2003-10-17 | 2004-12-08 | 上海一诺仪表有限公司 | A four-rotator flowmeter |
| CN101608937A (en) * | 2008-06-20 | 2009-12-23 | 安徽理工大学 | A kind of low-pulsation gear flowmeter of composite gear type |
| CN201425495Y (en) * | 2009-05-27 | 2010-03-17 | 无锡恒滨精密机械制造厂 | Liquid volume flow meter for fuel tanker |
| CN202177409U (en) * | 2011-07-28 | 2012-03-28 | 唐自福 | Gear flow transducer |
| CN103674124A (en) * | 2012-09-04 | 2014-03-26 | 天津有序环境科技发展有限公司 | Gear type flow direction flow transmitter |
-
2017
- 2017-05-15 CN CN201710337863.1A patent/CN107084768A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2662202Y (en) * | 2003-10-17 | 2004-12-08 | 上海一诺仪表有限公司 | A four-rotator flowmeter |
| CN101608937A (en) * | 2008-06-20 | 2009-12-23 | 安徽理工大学 | A kind of low-pulsation gear flowmeter of composite gear type |
| CN201425495Y (en) * | 2009-05-27 | 2010-03-17 | 无锡恒滨精密机械制造厂 | Liquid volume flow meter for fuel tanker |
| CN202177409U (en) * | 2011-07-28 | 2012-03-28 | 唐自福 | Gear flow transducer |
| CN103674124A (en) * | 2012-09-04 | 2014-03-26 | 天津有序环境科技发展有限公司 | Gear type flow direction flow transmitter |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170822 |