CN104236684B - Fluid reversing device and guide-in and guide-out time difference compensation method thereof - Google Patents
Fluid reversing device and guide-in and guide-out time difference compensation method thereof Download PDFInfo
- Publication number
- CN104236684B CN104236684B CN201410549017.2A CN201410549017A CN104236684B CN 104236684 B CN104236684 B CN 104236684B CN 201410549017 A CN201410549017 A CN 201410549017A CN 104236684 B CN104236684 B CN 104236684B
- Authority
- CN
- China
- Prior art keywords
- state
- commutator
- mode
- reversing device
- switched
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
The invention discloses a fluid reversing device and a guide-in and guide-out time difference compensation method of the fluid reversing device. The method comprises the steps that the reversing device is in the to-be-switched state ClArBl of a non-work mode and enters in a work mode, Ar and Bl are not changed, and Cl is changed into Cr, namely, the state CrArBl; the reversing device is in the work mode, the state CrArBl is converted into the state CrAlBl, the state CrAlBl is converted into the state ClAlBl, the state ClAlBl is converted into the state ClAlBr, and ClAlBr is the to-be-switched state of the work mode; the reversing device is in the to-be-switched state ClAlBr of the work mode and enters in the non-work mode, Al and Br are not changed, and Cl is changed into Cr, namely, the state CrArBr; a water pump stops working, the reversing device is in the non-work mode, the state CrAlBr is converted into the state CrArBr, the state CrArBr is converted into the state ClArBr, the state ClArBr is converted into the state ClArBl, and ClArBl is the to-be-switched state of the non-work mode. According to the method, swap-out and swap-in of the reversing device have the same stroke, the swap-out and swap-in time difference of the reversing device caused by different strokes is eliminated, and the flowmeter verification precision is improved.
Description
Technical field
Derive and import time difference the present invention relates to flowmeter testing calibration field, more particularly to a kind of fluid reversing device
Compensation method.
Background technology
Metering is industrial eyes.Flow measurement as measuring science technology important component, with national economy,
National defense construction, scientific research have close relationship.This work is carried out, to ensureing product quality, improve production efficiency, promotion section
The development of technology all has important effect, particularly works as energy crisis, industrial production automation degree are more and more high
In modern epoch, status of the flowmeter in national economy is more obvious with effect.
Commutator is widely used in water as Static mass method, the important composition part of Static Volumetric Method flow apparatus
In the metering of flow, oily flow and heat energy meter flow apparatus.Its operation principle is to change liquid flow direction using mechanical part,
Its effect is to ensure that liquid continues to flow through measured stream gauge, the time of measuring of accurate metered flow meter.
Fig. 1, is the reversing arrangement figure based on common commutator, when reversing arrangement enters working condition from off working state
When, valve 104 is closed, and from right (right) to the left (left), water enters the promotion commutator 102 of pushing meanss 101 via reversing arrangement
Enter container 103；When its tangential off working state, commutator will be from left (left) to the right (right), and water enters via reversing arrangement
Enter return pipe 104；When the work has been finished, valve 105 is opened.
Note commutator crosses the line of demarcation time for t from right to leftr→l, the time for crossing line of demarcation to the right from left swing is tl→r,
Mass flow qmIt is more constant, then reversing arrangement is switched to the flow error Δ Q of mode of operation from non-operating mode1For：
ΔQ1=-qm·tr→l (1)
Reversing arrangement is switched to the flow error Δ Q of non-operating mode from mode of operation2For：
ΔQ2=qm·tl→r (2)
Therefore because the flow error Δ Q that reversing arrangement commutating period brings is：
Δ Q=Δs Q1+ΔQ2=qm·tl→r-qm·tr→l=qm(tl→r-tr→l)=qm·Δt (3)
Δ t=t in above formulal→r-tr→lFor the positive and negative journey time of reversing arrangement inconsistent commutating period is poor.
Above formula shows, for qm=Const, in | Δ t | in the case of → 0, Δ Q → 0, i.e. reversing arrangement tr→l、tl→rMore connect
Closely, flow error Δ Q is just smaller.
Relevant research shows there is larger mechanical trip because commutator commutation swings, twice commutating period difference Δ t magnitudes
Hundreds of ms are reached, therefore to improve flow measurement precision, it is necessary to which the error for overcoming time difference Δ t to cause influences.Based on common commutation
It is the master of whole flow measurement device because the inconsistent error brought of positive and negative journey time is larger when the reversing arrangement of device commutates
Error source is wanted, therefore is necessary by improving reversing arrangement structure, the influence brought when reducing commutation to greatest extent.
The content of the invention
In order to solve the above technical problems, derived it is an object of the invention to provide a kind of fluid reversing device and the device importing
Time difference compensation method, described device and method are realized changing unidirectional working method under mode of operation, dexterously overcome commutation
When due to commutator machinery the two-way time inconsistent influence for bringing, convert thereof into reversing arrangement one-stroke repeat sex chromosome mosaicism,
Improve flow measurement precision.
The purpose of the present invention is realized by following technical scheme：
The method is based on measuring device, commutator and at least two transverters and realizes, if commutator is in the shape on the left side and the right
State is designated as C respectivelyl、Cr, a transverter is at the left side and the state on the right distinguishes Al、Ar, another circulator be in the left side and
The state on the right is designated as B respectivelyl、Br；Its method includes：
A reversing arrangements are in the to be switched state C of non-operating modelArBl, into mode of operation, Ar、BlIt is constant, ClIt is changed into
Cr, i.e. state CrArBl；
B reversing arrangements are in mode of operation, from state CrArBlIt is transformed into state CrAlBl, state CrAlBlIt is transformed into state
ClAlBl, state ClAlBlIt is transformed into state ClAlBr, ClAlBrIt is the to be switched state of mode of operation；
C reversing arrangements are in the to be switched state C of mode of operationlAlBr, into non-operating mode Al、BrIt is constant, ClIt is changed into
Cr, i.e. state CrAlBr；
D water pumps are stopped, and reversing arrangement is in non-operating mode, from state CrAlBrGo to state CrArBr, state
CrArBrGo to state ClArBr, state ClArBrGo to state ClArBl, ClArBlIt is the to be switched state of non-operating mode.
Compared with prior art, one or more embodiments of the invention can have the following advantages that：
Realize that commutator swaps out and changes to identical stroke, eliminate the commutator caused by stroke difference and swap out and change
The time difference for entering, improve the precision of meter proof.
Brief description of the drawings
Fig. 1 is the reversing arrangement structural representation that prior art is based on common fluid commutator；
Fig. 2 is the fluid reversing device structural representation that the present invention is provided；
Fig. 3 is to ensure that fluid reversing device has the method flow diagram of identical positive and negative commutating period.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing to this hair
It is bright to be described in further detail.
As shown in Fig. 2 being the fluid reversing device schematic diagram of identical positive and negative commutating period.It is right for proposing there is problem
Apparatus structure is improved, and with the addition of transverter A201, transverter B202, Δ t can be overcome to influence, if commutator, the left and right change of current
Device is respectively C, A, B, and commutator C is in the left side (left), the state in the right (right) and is designated as C respectivelyl、Cr, transverter A
State in the left side (left), the right (right) is designated as A respectivelyl、Ar, transverter B is in the left side (left), the right
(right) state is designated as B respectivelyl、Br。
Referring to Fig. 3, to ensure that fluid reversing device has the method flow of identical positive and negative commutating period, by flow chart analysis
Understand：
When 1. changing state due to transverter A (or B), commutator C always connects and is protected to transverter B (or A), and its state
Hold constant, so when mode of operation do not change so that the positive revesal inconsistencies of transverter A (or B) are to whole commutation dress
Put and bring flow error；
2. due to commutator C-state from CrTo ClWhen, transverter A, B are at same state, so when its mode of operation
It is constant, in continuous duty；
3. when reversing arrangement changes mode of operation, commutator C-state is all from ClTo CrI.e. from left to right, commutator is realized
It is unidirectional to change mode of operation.
If device is in be switched state, then：
1. A during Dietary behaviorr、BlIt is constant, ClIt is changed into Cr, i.e. state CrArBlIf commutator C enters mode of operation (i.e. the
Once from state ClCross line of demarcation and reach state Cr) time be tl→r', mass flowqmMore constant, then reversing arrangement is from non-
Mode of operation is switched to the flow error Δ Q of mode of operation1' be：
ΔQ1'=- qm·tl→r′ (4)
From state CrArBlTo state CrAlBl, state CrAlBlTo state ClAlBl, state ClAlBlTo state ClAlBr, commutation
Device is not brought because commutation zone comes flow error, ClAlBrIt is again to be switched state.
2. by be switched state ClAlBr, into non-operating mode, Al、BrIt is constant, ClIt is changed into Cr, i.e. state CrAlBrIf changing
Enter non-operating mode (i.e. for the second time from state C to device ClCross line of demarcation and reach state Cr) time be tl→r", quality stream
Amount qmMore constant, then reversing arrangement is switched to the flow error Δ Q' of non-operating mode from mode of operation2For：
ΔQ'2=qm·tl→r″ (5)
Similarly, from state CrAlBrTo state CrArBr, state CrArBrTo state ClArBr, state ClArBrTo state
ClArBl, reversing arrangement is not due to the flow error that commutation zone comes, ClArBlIt is again to be switched state.
Therefore, in a complete working period, the flow error Δ Q ' brought by reversing arrangement is：
Δ Q '=Δ Q1'+ΔQ'2=qm·tl→r″-qm·tl→r'=qm(tl→r″-tl→r')=qm·Δt′ (6)
Δ t '=t in above formulal→r″-tl→r' for the commutating period of reversing arrangement identical single direction stroke twice it is poor.
Due to Δ t '<<Δ t, then flow error Δ Q '<<ΔQ.If tl→r"=tl→r',That is reversing arrangement
Flow error during commutation is zero.
If water flow field changes, or pushing meanss are unstable, and all the repeatability of commutator can be caused to weaken, and now can
Cause tl→r' and tl→r" do not repeat, but Δ t ' repeatability (several ms of magnitude) compares original Δ t (ms of magnitude hundreds of) and has had aobvious
Write and lower, the present apparatus effectively eliminates commutator derivation, influence of the importing time to flow measurement, greatly improve flow measurement essence
Degree.
Although disclosed herein implementation method as above, described content is only to facilitate understanding the present invention and adopting
Implementation method, is not limited to the present invention.Any those skilled in the art to which this invention pertains, are not departing from this
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the formal and details implemented,
But scope of patent protection of the invention, must be still defined by the scope of which is defined in the appended claims.
Claims (5)
1. fluid reversing device derive import time difference compensation method, it is characterised in that the method be based on measuring device, commutator and
At least two transverters are realized, if commutator is in the left side and the state on the right is designated as C respectivelyl、Cr, a transverter is at
The state difference A on the left side and the rightl、Ar, another transverter is in the left side and the state on the right is designated as B respectivelyl、Br；Its method bag
Include following steps：
Step 10 reversing arrangement is in the to be switched state C of non-operating modelArBl, into mode of operation, Ar、BlIt is constant, ClBecome
It is Cr, i.e. state CrArBl；
Step 20 reversing arrangement is in mode of operation, from state CrArBlIt is transformed into state CrAlBl, state CrAlBlIt is transformed into state
ClAlBl, state ClAlBlIt is transformed into state ClAlBr, ClAlBrIt is the to be switched state of mode of operation；
Step 30 reversing arrangement is in the to be switched state C of mode of operationlAlBr, into non-operating mode Al、BrIt is constant, ClIt is changed into
Cr, i.e. state CrAlBr；
Step 40 water pump is stopped, and reversing arrangement is in non-operating mode, from state CrAlBrGo to state CrArBr, state
CrArBrGo to state ClArBr, state ClArBrGo to state ClArBl, ClArBlIt is the to be switched state of non-operating mode.
2. fluid reversing device according to claim 1 is derived and imports time difference compensation method, it is characterised in that described
In step 10, if commutator into mode of operation be for the first time from state ClCross line of demarcation and reach state CrTime be
tl→r', mass flow qmMore constant, then reversing arrangement is switched to the flow error Δ Q ' of mode of operation from non-operating mode1It is Δ
Q′1=-qm·tl→r′；
In the step 30, commutator C enters non-operating mode, i.e., for the second time from state ClCross line of demarcation and reach state Cr's
Time is tl→r", mass flow qmConstant, then reversing arrangement is switched to the flow error Δ Q ' of non-operating mode from mode of operation2
For：ΔQ′2=qm·tl→r″。
3. fluid reversing device according to claim 1 is derived and imports time difference compensation method, it is characterised in that described
In step 20, when the transverter changes state, commutator is always connect to different transverters, and state keeps constant, now
Water flows into measuring device so that the positive revesal inconsistency of transverter brings flow error to whole reversing arrangement；Commutator state from
CrTo ClWhen, the transverter is in same state, and now water flows into measuring device, in continuous duty so that commutator state
From CrTo ClWhen, flow error will not be brought to whole reversing arrangement.
4. fluid reversing device according to claim 2 is derived and imports time difference compensation method, it is characterised in that described
Fluid reversing device pattern switching error, in a complete working period, due to the flow that reversing arrangement commutating period brings
Error delta Q ' is：
Δ Q '=Δ Q '1+ΔQ′2=qm·tl→r″-qm·tl→r'=qm(tl→r″-tl→r')=qm·Δt′
Wherein, Δ t ＇ be reversing arrangement identical single direction stroke twice commutating period it is poor.
5. fluid reversing device according to claim 1 derives the fluid reversing dress for importing time difference compensation method operation
Put, it is characterised in that
The commutator is connected with the transverter；
The transverter is connected to measuring device and return pipe；
The commutator is connected with pushing meanss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549017.2A CN104236684B (en) | 2014-10-16 | 2014-10-16 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549017.2A CN104236684B (en) | 2014-10-16 | 2014-10-16 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104236684A CN104236684A (en) | 2014-12-24 |
| CN104236684B true CN104236684B (en) | 2017-05-17 |
Family
ID=52225213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410549017.2A Active CN104236684B (en) | 2014-10-16 | 2014-10-16 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104236684B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509844B (en) * | 2015-11-23 | 2018-09-28 | 华南理工大学 | A kind of universal liquid flowrate calibrating device open commutator calibration method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201060035Y (en) * | 2007-07-10 | 2008-05-14 | 兰州市供水（集团）有限公司 | Commutalor with adjustable stroke speed and time difference |
| CN102359807A (en) * | 2011-08-08 | 2012-02-22 | 天津大学 | Control scheme for flow stability of liquid flow device |
| CN202748108U (en) * | 2012-09-07 | 2013-02-20 | 丹东科泰仪器仪表有限公司 | Liquid reversing device of flow measurement standard system |
| CN203745051U (en) * | 2014-03-25 | 2014-07-30 | 重庆市计量质量检测研究院 | Two-position one-way reversing valve type pVTt-method gas flow device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010121650A1 (en) * | 2009-04-21 | 2010-10-28 | Aquametro Ag | Method and device for calibrating liquid meters |
-
2014
- 2014-10-16 CN CN201410549017.2A patent/CN104236684B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201060035Y (en) * | 2007-07-10 | 2008-05-14 | 兰州市供水（集团）有限公司 | Commutalor with adjustable stroke speed and time difference |
| CN102359807A (en) * | 2011-08-08 | 2012-02-22 | 天津大学 | Control scheme for flow stability of liquid flow device |
| CN202748108U (en) * | 2012-09-07 | 2013-02-20 | 丹东科泰仪器仪表有限公司 | Liquid reversing device of flow measurement standard system |
| CN203745051U (en) * | 2014-03-25 | 2014-07-30 | 重庆市计量质量检测研究院 | Two-position one-way reversing valve type pVTt-method gas flow device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104236684A (en) | 2014-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Pan et al. | Flow field simulation and a flow model of servo-valve spool valve orifice | |
| CN202487187U (en) | Intelligent critical heat flux density measuring device | |
| CN103729505B (en) | CFD (computational fluid dynamics) based method for computing equivalent length of valve | |
| CN103353908A (en) | Accurate computing method used for pipeline resistance coefficient and based on numerical computation | |
| CN104236684B (en) | Fluid reversing device and guide-in and guide-out time difference compensation method thereof | |
| CN203224283U (en) | Liquid flow field calibration device | |
| CN202157769U (en) | Pressurized online measuring device for density of drilling fluid | |
| CN106123973A (en) | The vortex-shedding meter of low reynolds number flow is measured based on cross-correlation analysis | |
| CN103047224A (en) | Leakage measurement system | |
| CN203163984U (en) | Experimental system for analyzing internal flow characteristics of butterfly valve | |
| CN104990602B (en) | The automatic compensation measurement method of natural gas flow measuring system | |
| CN201094048Y (en) | Mass flow sensor and mass flow control apparatus | |
| CN104990608B (en) | Conducive to the natural gas flow measuring method of metering accuracy | |
| CN205464959U (en) | Fixed frock in frame hinge location | |
| CN202533120U (en) | Wide-range gas flowmeter integrating instrument | |
| CN201707086U (en) | Flow measuring meter of mixed gas | |
| CN203216574U (en) | Locator for on-site Z-method detection of portable ultrasonic flowmeter | |
| CN206387688U (en) | A kind of intelligent reading Ubbelohde viscometer | |
| CN203534651U (en) | Flow-controllable multi-mode flow detection device with digital display function | |
| CN205619981U (en) | A compound meter for hydraulic system | |
| CN103134738A (en) | On-line alcohol degree testing method in liquor processing process | |
| CN202092689U (en) | Novel electromagnetic flow measurement device | |
| Lu et al. | Lead price forecasting based on ARIMA model | |
| CN104515887B (en) | HIL rack high pressure MeUn valve current acquisition methods | |
| CN203893890U (en) | Doppler gate flow measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |