CN208125203U - A kind of three curve wing rectification type apparatus for measuring air quantity - Google Patents
A kind of three curve wing rectification type apparatus for measuring air quantity Download PDFInfo
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- CN208125203U CN208125203U CN201820486569.7U CN201820486569U CN208125203U CN 208125203 U CN208125203 U CN 208125203U CN 201820486569 U CN201820486569 U CN 201820486569U CN 208125203 U CN208125203 U CN 208125203U
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- throttling element
- airfoil type
- surface airfoil
- air quantity
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Abstract
The utility model discloses a kind of three curve wing rectification type apparatus for measuring air quantity, including measurement pipe, equipped with multiple sections in the throttling element of multi-cambered surface airfoil type in measurement pipe, the multi-cambered surface airfoil type throttling element is closing hollow structure, and the leading edge of multi-cambered surface airfoil type throttling element is to meet fluid end；The leading edge of multi-cambered surface airfoil type throttling element is provided at least two positive pressure ports；The profile thickness thickness of multi-cambered surface airfoil type throttling element is provided at least two negative pressure ports；Each positive pressure port is in charge of by the positive pressure inside multi-cambered surface airfoil type throttling element summarizes perforation to positive impulse general pipeline；Each negative pressure port is in charge of by the negative pressure inside multi-cambered surface airfoil type throttling element summarizes perforation to negative impulse general pipeline；The inside of the multi-cambered surface airfoil type throttling element forms fluid line, and multi-cambered surface airfoil type throttling element lower end is equipped with fluid and flows into pipe, and upper end is equipped with fluid effuser；Multi-cambered surface airfoil type throttling element is connect with electrostatic power-up device.
Description
Technical field
The utility model relates to a kind of apparatus for measuring air quantity, and in particular to a kind of three curve wing rectification type air measurings dress
It sets.
Background technique
Major boiler of power plant air inlet and secondary air flow are due to being related to boiler efficiency at present, so increasingly paying attention to air quantity
Carry out precise measurement.The device for being commonly used to measurement air quantity in the past mainly has the differential pressure flowmeters such as Venturi tube, this flowmeter
The ways of measure pressure of use is that fluid central compressed pressure and is only applicable to the flow measurement of round pipeline.Due to common text
It is close to typical, fully developed turbulent condition, and nothing that venturi differential pressure flowmeter, which requires the flow regime of detected fluid,
The perfect fluid (i.e. straight line) of whirlpool, therefore quite long straight tube must be installed Venturi tube differential pressure flowmeter is forward and backward
Section.By 3 explanation of GB/T2624.2-2006 table：When diameter is equal to 0.6 than β value, then straight pipe is 10 times of internal diameter of the pipeline before device,
Straight pipe is 4.5 times of internal diameter of the pipeline afterwards.In this way, not only structure is complicated, and cause the waste of making material.And it can't use
In the flow measurement of square tube.
If the hot wind of boiler without recycling, will cause the waste of resource, thus can by the measurement of air quantity with
The recycling of resource combines, and provides a kind of environmentally friendly measuring device.
Utility model content
The purpose of this utility model is that overcoming defect existing in the prior art, a kind of three curve wings rectification is provided
Type apparatus for measuring air quantity, the transition straight pipe which only must be shorter, completely solves common flow measurement device because that can not expire
The problem of foot its straight pipe design length in reserve requires and influences measurement accuracy, and precision is high, reproducible, range ratio is wide,
Crushing is low.And the device can be effectively using the waste heat in boiler air, and removes the sand and dust in fluid, prevents pressure port quilt
Dirt is blocked, the service life of the measuring device provided.
To achieve the above object, the technical solution of the utility model is to design a kind of three curve wing rectification type air measurings
Device, including measurement pipe, measurement pipe is interior to be equipped with multiple multi-cambered surface airfoil type throttling elements, and the multi-cambered surface airfoil type throttling element is envelope
Hollow structure is closed, the leading edge of multi-cambered surface airfoil type throttling element is to meet fluid end；The leading edge of multi-cambered surface airfoil type throttling element is provided with
At least two positive pressure ports；The profile thickness thickness of multi-cambered surface airfoil type throttling element is provided at least two negative pressure ports；Respectively
Positive pressure port is in charge of by the positive pressure inside multi-cambered surface airfoil type throttling element summarizes perforation to positive impulse general pipeline；Each bear takes
Pressure hole is in charge of by the negative pressure inside multi-cambered surface airfoil type throttling element summarizes perforation to negative impulse general pipeline；The multi-cambered surface
The inside of airfoil type throttling element forms fluid line, and multi-cambered surface airfoil type throttling element lower end is equipped with fluid and flows into pipe, and upper end is equipped with
Fluid effuser；Multi-cambered surface airfoil type throttling element is connect with electrostatic power-up device.Throttling element connect with electrostatic power-up device and plays
The effect of electrostatic precipitation.The connection with voltage device is disconnected during periodic inspection, using spray equipment by multi-cambered surface airfoil type
The dirt on throttling element surface sprays, from the sewage draining exit discharge of measurement bottom of the tube.
The measurement pipe outer wall is additionally provided with sewage draining exit as a preferred technical solution, and the sewage draining exit is connected to Blowoff ball valve.
The multi-cambered surface airfoil type throttling element top is equipped with spray tube as a preferred technical solution,.
The positive impulse general pipeline is equipped with pressure measuring valve as a preferred technical solution,.
The negative impulse general pipeline is equipped with pressure measuring valve as a preferred technical solution,.
The measurement pipe both ends are respectively arranged with connecting flange as a preferred technical solution,.
The plane of symmetry of multi-cambered surface airfoil type throttling element is axially parallel with measurement pipe as a preferred technical solution,.
Positive pressure is in charge of parallel with the plane of symmetry of multi-cambered surface airfoil type throttling element as a preferred technical solution,.
Negative pressure is in charge of parallel with the plane of symmetry of multi-cambered surface airfoil type throttling element as a preferred technical solution,.
The airfoil type throttling element is that multi-cambered surface type is made it have due to its unique structure type to fluid self-rectifying
Effect to which to make device more stable in measuring flow, and keep straight pipe required by device shorter, the scene of meeting makes
Harsh conditions.
The utility model is applicable to the air measuring of square tube and round tube, and is respectively arranged with connection at measurement pipe both ends
Flange.
The utility model by by fluid in multiple multi-cambered surface airfoil type throttling element edgewise compressive pressures, due to unique knot
Configuration formula, the transition straight pipe that the utility model only must be extremely short, completely solves common flow measurement device because being unable to satisfy it
The problem of straight pipe design length in reserve requires and influences measurement accuracy, the straight pipe length in reserve of the utility model is：Device
Preceding straight pipe L1 >=0.6Dn, straight pipe L2 >=0.2Dn after device；(W-air duct width；H-air duct height)
The advantages of the utility model and beneficial effect are：A kind of three curve wing rectification type air quantities are provided, it is described
Three curve wing rectification type air quantities only must be shorter transition straight pipe, completely solve common flow measurement device because can not
Meet the problem of its straight pipe design length in reserve requires and influences measurement accuracy, and precision is high, reproducible, range ratio
Width, crushing are low.And this three curve wing rectification type air quantity structure is simple, design rationally, has good practicability.This reality
With water pipe is equipped with inside novel multi-cambered surface airfoil type throttling element, the heat of fluid is made full use of while measuring fluid,
Fluid side measurement and the recycling and reusing of fluid heat are organically combined.During boiler air-quantity measuring, in fluid
Dust can be mingled with, in such a way that electrostatic goes out dirt, the dust effectively avoided blocks measured hole.
Compared to common differential pressure flowmeter, the utility model：
A, flow development length requires small：
Since general differential pressure flowmeter is to meet flow measurement precision, it is desirable that the flow regime of detected fluid is close to allusion quotation
The fully developed turbulent condition of type and perfect fluid (i.e. straight line) without whirlpool.Therefore when β value (diameter ratio) takes ideal
When value 0.6, then straight pipe is 10 times of internal diameter of the pipeline before device, and rear straight pipe is 4.5 times of internal diameter of the pipeline.And the utility model multi sphere
Face rectification type wing type wind measuring device has rectifying effect because of itself, so being not required in addition add fairing, reserved straight pipe is wanted
Straight pipe L1 >=0.6Dn before only device, straight pipe L2 >=0.2Dn after device are asked, therefore greatly reduces the reserved length of straight pipe
Degree, had not only saved process pipe material, but also reduce working site space hold position.
B, precision is high, reproducible：
Since the positive pressure port of the utility model meets stream end face in airfoil type throttling element, pressure sensor location is selected in inviscid flow
The constant speed region of body, positive pressure signal stabilization；The flow velocity that negative pressure port is located at airfoil type throttling element is most located fastly, is in pressure smallest region
Domain makes negative pressure signal fluctuate very little.Therefore, the differential pressure signal of output is highly stable.It is proved through multiple flow rate test：It measures essence
Degree is higher than ± 1.0% (1.0 grades), repeatability error < ± 0.1%.
C, range ratio is wide, crushing is low：
The utility model range ratio is under normal circumstances up to 4：1, if parameter selection is reasonable, highest range ratio is up to 8：1.Machine
Under same β value (diameter ratio), it is about the latter's that the permanent compression of formation, which loses the former, for aerofoil profile throttling element and orifice throttle part
1/4。
D, stability is good, can survey the air quantity in various air ducts：
The utility model multi-cambered surface rectification type wing type wind measuring device is because generating fluid when its air foil enables flow through
Effect of boundary layer makes medium seldom wear throttling element edge.So as to make β value (diameter ratio) holding remain unchanged for a long period of time.Simultaneously because whole
Machine is no movable member that is welded, and need not repeat to demarcate after primary calibration, therefore its measurement accuracy can remain unchanged for a long period of time, and stablize
Property is good.
Since the utility model multi-cambered surface rectification type wing type wind measuring device is mainly used on air measuring, according to selected
Material is different, and up to 540 DEG C, pressure rating generally works under≤2.5MPa pressure condition maximum operating temperature, and
Ontology is without detachable part, No leakage possibility.Therefore device can under various complex working conditions steady operation.
Detailed description of the invention
Fig. 1 is the front view of the utility model；
Fig. 2 is the top view of the utility model.
In figure：1, pressure general pipeline；2, multi-cambered surface airfoil type throttling element；3, blowdown apparatus；4, connecting flange；5, measurement pipe；
6, negative pressure is in charge of；7, positive impulse is in charge of；8, spray equipment；9, spray port；10, water inlet pipe；11, outlet pipe.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement below
Example is only used for clearly illustrating the technical solution of the utility model, and cannot be used as a limitation the protection model of limitation the utility model
It encloses.
The utility model specific implementation technical solution be：
A kind of three curve wing rectification type apparatus for measuring air quantity, including measurement pipe 5, measurement pipe is interior to be equipped with multiple sections in more
Cambered surface airfoil type throttling element 2, the multi-cambered surface airfoil type throttling element 2 are closing hollow structure；Multi-cambered surface airfoil type throttling element
Leading edge is to meet fluid end；The leading edge of multi-cambered surface airfoil type throttling element is provided at least two positive pressure ports；Multi-cambered surface airfoil type section
The profile thickness thickness of stream part is provided at least two negative pressure ports；Each positive pressure port is throttled by being located at multi-cambered surface airfoil type
Positive pressure inside part is in charge of 7 and summarizes perforation to positive impulse general pipeline；Each negative pressure port is by being located at multi-cambered surface airfoil type throttling element
Internal negative pressure is in charge of 6 and summarizes perforation to negative impulse general pipeline；Fluid line is equipped with inside the multi-cambered surface airfoil type throttling element,
Multi-cambered surface airfoil type throttling element lower end is equipped with water inlet pipe 10, and upper end is equipped with outlet pipe 11；Multi-cambered surface airfoil type throttling element and electrostatic
Power-up device connection, throttling element play the effect of electrostatic precipitation, the connection with voltage device are disconnected during periodic inspection, is utilized
Spray tube 8 sprays the dirt on multi-cambered surface airfoil type throttling element surface, and the spray tube 8 is along multi-cambered surface airfoil type throttling element
Outer surface is arranged, and offers spray port 9 on spray tube 8, from the sewage draining exit discharge of measurement bottom of the tube.The measurement pipe outer wall is also set
There is sewage draining exit, the sewage draining exit is connected to Blowoff ball valve 3.The multi-cambered surface airfoil type throttling element top is equipped with spray tube.It is described just
Impulse general pipeline is equipped with pressure measuring valve.The negative impulse general pipeline is equipped with pressure measuring valve.The measurement pipe both ends are respectively arranged with connection
Flange 4.The plane of symmetry of multi-cambered surface airfoil type throttling element is axially parallel with measurement pipe.Positive pressure is in charge of to be throttled with multi-cambered surface airfoil type
The plane of symmetry of part is parallel.Negative pressure is in charge of parallel with the plane of symmetry of multi-cambered surface airfoil type throttling element.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (9)
1. a kind of three curve wing rectification type apparatus for measuring air quantity, including measurement pipe, measurement pipe is interior to be equipped with multiple sections in multi sphere
The throttling element of face airfoil type, the multi-cambered surface airfoil type throttling element is to close hollow structure, before multi-cambered surface airfoil type throttling element
Edge is to meet fluid end, and the leading edge of multi-cambered surface airfoil type throttling element is provided at least two positive pressure ports；The throttling of multi-cambered surface airfoil type
The profile thickness thickness of part is provided at least two negative pressure ports；Each positive pressure port is by being located at multi-cambered surface airfoil type throttling element
Internal positive pressure, which is in charge of, summarizes perforation to positive impulse general pipeline；Each negative pressure port is by being located inside multi-cambered surface airfoil type throttling element
Negative pressure be in charge of and summarize perforation to negative impulse general pipeline；It is characterized in that, the inside of the multi-cambered surface airfoil type throttling element is formed
Fluid line, multi-cambered surface airfoil type throttling element lower end are equipped with fluid and flow into pipe, and upper end is equipped with fluid effuser；Multi-cambered surface airfoil type
Throttling element is connect with electrostatic power-up device.
2. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 1, which is characterized in that the measurement
Pipe outer wall is additionally provided with sewage draining exit, and the sewage draining exit is connected to Blowoff ball valve.
3. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 2, which is characterized in that the multi sphere
Face airfoil type throttling element top is equipped with spray tube.
4. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 1, which is characterized in that described just to draw
General pipeline is pressed to be equipped with pressure measuring valve.
5. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 1, which is characterized in that described bear is drawn
General pipeline is pressed to be equipped with pressure measuring valve.
6. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 1, which is characterized in that the measurement
Pipe both ends are respectively arranged with connecting flange.
7. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 1, which is characterized in that multi-cambered surface machine
The plane of symmetry of aerofoil profile throttling element is axially parallel with measurement pipe.
8. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 1, which is characterized in that positive pressure point
It manages parallel with the plane of symmetry of multi-cambered surface airfoil type throttling element.
9. a kind of three curves wing rectification type apparatus for measuring air quantity according to claim 1, which is characterized in that negative pressure point
It manages parallel with the plane of symmetry of multi-cambered surface airfoil type throttling element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486569.7U CN208125203U (en) | 2018-04-08 | 2018-04-08 | A kind of three curve wing rectification type apparatus for measuring air quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486569.7U CN208125203U (en) | 2018-04-08 | 2018-04-08 | A kind of three curve wing rectification type apparatus for measuring air quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208125203U true CN208125203U (en) | 2018-11-20 |
Family
ID=64193805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820486569.7U Active CN208125203U (en) | 2018-04-08 | 2018-04-08 | A kind of three curve wing rectification type apparatus for measuring air quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208125203U (en) |
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2018
- 2018-04-08 CN CN201820486569.7U patent/CN208125203U/en active Active
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