CN201583293U - Fluid medium bidirectional flow accurate metering device - Google Patents
Fluid medium bidirectional flow accurate metering device Download PDFInfo
- Publication number
- CN201583293U CN201583293U CN2009202944430U CN200920294443U CN201583293U CN 201583293 U CN201583293 U CN 201583293U CN 2009202944430 U CN2009202944430 U CN 2009202944430U CN 200920294443 U CN200920294443 U CN 200920294443U CN 201583293 U CN201583293 U CN 201583293U
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- differential pressure
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- fluid media
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Abstract
The utility model discloses a fluid medium bidirectional flow accurate metering device, which comprises a metering pipe (1), pressure tapping pipes (2), a pressure transmitter (3), a temperature transmitter (4), a differential pressure transmitter (5) and a flow meter (6). The pressure transmitter (3), the temperature transmitter (4) and the differential pressure transmitter (5) are respectively electrically connected with the flow meter (6); the pressure tapping pipes (2) are symmetrically arranged on the metering pipe (1); pressure inductive probes of the pressure transmitter (3) extend into the pressure tapping pipes (2); pressure inductive signals are transmitted to the flow meter (6) through the differential pressure transmitter (5); a temperature inductive probe of the temperature transmitter (4) extends into the metering pipe (1); and a wedge-shaped detecting part (8) is arranged between two pressure tappings inside the metering pipe (1). By using the differential pressure wedge-shaped flow meter and computer software technology, the fluid medium bidirectional flow accurate metering device effectively solves the problem of bidirectional accurate metering of the fluid media under the condition of not adding other extra hardware equipment, and realizes date sharing by connection with a local area network through an RS485 communication interface.
Description
Technical field
The utility model belongs to the metering outfit technical field, is specifically related to a kind of fluid media (medium) bidirectional traffics accurate measuring device that can accurate measurement two-way fluid flow.
Background technology
Same in process of production Measuring and testing point flows into certain medium sometimes, but can export medium of the same race again in another section period.Utilize same Measuring and testing point meter fluid inflow and outflow amount respectively, it is particularly important to seem in production control and trade settlement.The method that prior art solves the mobile metering of two-way fluid has: 1, increase by four retaining valves before Measuring and testing point, allow the fluid of different directions behind reversal valve, fix a certain direction outflow, the flow direction that is flow detection point is consistent all the time, is equivalent to a cover commutation device.The characteristics of this method are 1. to need newly to assemble four retaining valves, occupy the space and greatly also need lay many pipelines.But aborning, particularly large pipeline is to be difficult for realizing.Though 2. this kind metering method can characterize the fluid flow size, can not characterize the positive and negative direction of fluid flow state and fluid.Integrated flux is actually and is superimposed by same direction positive and negative, the Fluid Volume that can not measure inflow respectively, flows out.2, water meter formula bidirectional measuring.This method is divided into annular guide shell upper and lower two-layer by changing the inner structure of common water meter.Water conservancy diversion cut-out direction on the upper and lower two-layer annular guide shell is opposite, and the positive and negative direction rotation of impeller sheet realizes metering.The characteristics of the method are 1. to innovate on the basis of common water meter.2. measures range is narrow, only is suitable for the bidirectional measuring of water or liquid.3. data on flows can't be distinguished the amount that positive and negative direction fluid flows into, flows out, and accumulation results is a net value after forward and reverse flow subtracts each other.In sum, the bidirectional measuring device of prior art mostly has high input, and the scope of application is little, can not clearly distinguish the deficiency of the forward and reverse accumulated value of integrated flux.For this reason, the design people is through a large amount of experimental studies, developed a kind of fluid media (medium) bidirectional traffics accurate measuring device that can accurate measurement two-way fluid flow.
The utility model content
It is a kind of simple in structure that the purpose of this utility model is to provide, working stability, fluid media (medium) bidirectional traffics accurate measuring device that can accurate measurement two-way fluid flow.
The purpose of this utility model is achieved in that and comprises gauge line, pressure pipe, pressure unit, temperature transmitter, differential pressure transmitter, flow instrument, pressure unit, temperature transmitter, differential pressure transmitter electrically connect with flow instrument respectively, be symmetrical arranged the pressure pipe on the gauge line, the pressure sensitive probe of pressure unit stretches in the pressure pipe, the pressure sensitive signal is delivered to flow instrument by differential pressure transmitter, the temperature sense probe of temperature transmitter stretches into gauge line, between inner two pressure tappings of gauge line the wedge shape detection piece is set.
The utility model utilization differential pressure type wedge shape flowmeter and computer software technology, under the situation that does not increase other additional hardware equipment, solved the problem of the two-way accurate measurement of fluid media (medium) preferably, and connect the realization data sharing by RS485 communication interface and LAN (Local Area Network).
Description of drawings
Fig. 1 concerns synoptic diagram for the utility model flowmeter structure;
Fig. 2 is the computer control FB(flow block).
Among the figure: 1-gauge line, 2-pressure pipe, 3-pressure unit, 4-temperature transmitter, 5-differential pressure transmitter, 6-controller, 7-LAN (Local Area Network), 8-wedge shape detection piece.
Embodiment
As shown in Figure 1, comprise gauge line 1, pressure pipe 2, pressure unit 3, temperature transmitter 4, differential pressure transmitter 5, flow instrument 6, pressure unit 3, temperature transmitter 4, differential pressure transmitter 5 electrically connect with flow instrument 6 respectively, be symmetrical arranged pressure pipe 2 on the gauge line 1, the pressure sensitive probe of pressure unit 3 stretches in the pressure pipe 2, the pressure sensitive signal is delivered to flow instrument 6 by differential pressure transmitter 5, the temperature sense probe of temperature transmitter 4 stretches into gauge line 1, between gauge line 1 inner two pressure tappings wedge shape detection piece 8 is set.
Described flow instrument 6 electrically connects by communication interface and LAN (Local Area Network) 7 realizes data sharing.
Described flow instrument 6 connects by RS485 communication interface and LAN (Local Area Network) 7 realizes data sharing
Described wedge shape detection piece 8 is V-shaped throttle part, and its drift angle is circular arc down.Its structural symmetry, the liquid or the thick liquid that help containing suspended particle pass through smoothly, can not produce at the throttle part upstream side to remain in a standstill.And no matter fluid from which direction flow into all measurablely, and the efflux coefficient that flowmeter flowed into, flowed out direction about equally.
Described throttle part is an isosceles triangle, and its drift angle is 80 °-150 °;
Described throttle part is an isosceles triangle, and its drift angle is 90 °-135 °
Principle of work of the present utility model:
Use differential pressure transmitter to measure wedge shape flowmeter differential pressure value.When not having media flow in the pipeline, wedge shape flowmeter output differential pressure is zero, during the medium forward flow, and wedge shape flowmeter output forward differential pressure value, during reversed flow, wedge shape flowmeter output negative sense differential pressure value, therefore, the differential pressure range of flow transmitter should be-Δ P
Max1～Δ P
Max2
Wherein: Δ P
Max1--during----corresponding reversed flow fluid flow maximal value, the absolute value of wedge shape flowmeter output differential pressure value.
Δ P
Max2--during----corresponding forward flow fluid flow maximal value, wedge shape flowmeter output differential pressure value.
Use the method for differential pressure transmitter zero shift, can realize the measurement of above range differential pressure easily.
Computing machine can be judged the flow direction of fluid by to the detection of differential pressure value, when differential pressure is timing, fluid be positive flow to, when differential pressure when negative, fluid be reverse direction flow to.When differential pressure was zero, no fluid flowed.Computing machine should possess small-signal excision function, when forward and reverse flow value during less than setting, thinks that promptly flow is zero.
Show the computer-controlled workflow relation of the utility model as 2.
Characteristics of the present utility model:
1, the technological transformation cost is low, and is firm in structure not easy to wear, and stability is high.
2, can correctly distinguish instantaneous value, the accumulated value of forward and reverse flow, the instantaneous value of demonstration, cumulative data can be passed through network transmission, are convenient to instruct production control and material trade settlement.
3, can be used with intelligent flow meter, PLC or DCS system.
4, range ratio can reach 10: 1, bore scope 1.27～60.96cm.
Claims (6)
1. fluid media (medium) bidirectional traffics accurate measuring device, comprise gauge line (1), pressure pipe (2), pressure unit (3), temperature transmitter (4), differential pressure transmitter (5), flow instrument (6,) pressure unit (3), temperature transmitter (4), differential pressure transmitter (5) electrically connects with flow instrument (6) respectively, be symmetrical arranged pressure pipe (2) on the gauge line (1), the pressure sensitive probe of pressure unit (3) stretches in the pressure pipe (2), the pressure sensitive signal is delivered to flow instrument (6) by differential pressure transmitter (5), the temperature sense probe of temperature transmitter (4) stretches into gauge line (1), it is characterized in that: between inner two pressure tappings of gauge line (1) wedge shape detection piece (8) is set.
2. fluid media (medium) bidirectional traffics accurate measuring device as claimed in claim 1 is characterized in that: described wedge shape detection piece (8) is V-shaped throttle part, and its drift angle is circular arc down.
3. fluid media (medium) bidirectional traffics accurate measuring device as claimed in claim 1 is characterized in that: described flow instrument (6) electrically connects by communication interface and LAN (Local Area Network) (7).
4. as claim 1 or 3 described fluid media (medium) bidirectional traffics accurate measuring devices, it is characterized in that: described flow instrument (6) electrically connects by R5485 communication interface and LAN (Local Area Network) (7).
5. fluid media (medium) bidirectional traffics accurate measuring device as claimed in claim 2 is characterized in that: described throttle part is an isosceles triangle, and its drift angle is 60 °-160 °.
6. as claim 2 or 5 described fluid media (medium) bidirectional traffics accurate measuring devices, it is characterized in that: described throttle part is an isosceles triangle, and its drift angle is 90 °-135 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202944430U CN201583293U (en) | 2009-12-21 | 2009-12-21 | Fluid medium bidirectional flow accurate metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202944430U CN201583293U (en) | 2009-12-21 | 2009-12-21 | Fluid medium bidirectional flow accurate metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201583293U true CN201583293U (en) | 2010-09-15 |
Family
ID=42725295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202944430U Expired - Lifetime CN201583293U (en) | 2009-12-21 | 2009-12-21 | Fluid medium bidirectional flow accurate metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201583293U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019853A (en) * | 2014-06-05 | 2014-09-03 | 唐力南 | Diffusion tube type rectangular flow meter |
-
2009
- 2009-12-21 CN CN2009202944430U patent/CN201583293U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019853A (en) * | 2014-06-05 | 2014-09-03 | 唐力南 | Diffusion tube type rectangular flow meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100915 |
|
| CX01 | Expiry of patent term |