CN202631019U - Log-linear cross section air volume device - Google Patents
Log-linear cross section air volume device Download PDFInfo
- Publication number
- CN202631019U CN202631019U CN 201220273959 CN201220273959U CN202631019U CN 202631019 U CN202631019 U CN 202631019U CN 201220273959 CN201220273959 CN 201220273959 CN 201220273959 U CN201220273959 U CN 201220273959U CN 202631019 U CN202631019 U CN 202631019U
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- Prior art keywords
- tube
- log
- positive pressure
- negative pressure
- measuring
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- Expired - Fee Related
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Abstract
The utility model discloses a log-linear cross section air volume device which comprises a measuring pipe; the measuring pipe is internally provided with a grid-type rectifier, a positive pressure tapping measurement body and a negative pressure tapping measurement body sequentially along the flow direction of a fluid, wherein the grid-type rectifier is vertical to the measuring pipe axially; the positive pressure tapping measurement body comprises at least two positive pressure tapping bamboo-flute-shaped pipes; each positive pressure tapping measurement body is provided with five positive pressure tapping measuring holes according to a log-linear method; the positive pressure tapping measuring holes are opposite to the flow direction of the fluid, and each positive pressure tapping measuring hole runs through and is connected to a positive pressure guide general pipe; the negative pressure tapping measurement body comprises at least two negative pressure tapping bamboo-flute-shaped pipes, each negative pressure tapping bamboo-flute-shaped pipe is provided with five negative pressure tapping measuring holes according to a log-linear method, and the negative pressure tapping measuring holes are back to the flow direction of the fluid; and the negative positive pressure tapping measuring hole runs through and are connected to a negative pressure guide general pipe. The log-linear cross section air volume device is light and smart in volume and high in measurement accuracy, and has good stability, and is simple in structure, reasonable in design, and good in practicability.
Description
Technical field
The utility model relates to a kind of apparatus for measuring air quantity, is specifically related to a kind of log-linear xsect air quantity device.
Background technology
Each high-power station's boiler air intake and secondary air flow are owing to relating to boiler efficiency, so more and more pay attention to air quantity is accurately measured at present.
The device that was commonly used to measure air quantity in the past mainly contains differential pressure type flowmeters such as Venturi tube, and the ways of measure pressure that this flowmeter adopts is with the compression pressure of fluid center, and is only applicable to the flow measurement of round pipeline.Afterwards along with the continuous change of technology; A kind of novel apparatus for measuring air quantity----airfoil type apparatus for measuring air quantity is widely used in the air measuring of power plant; But because the apparatus for measuring air quantity body is bigger; Just can't use for some specific short air channels, so a kind of volume of needs is more light and handy, measuring accuracy is high, the apparatus for measuring air quantity of good stability.
The utility model content
The purpose of the utility model is to overcome the defective of prior art, provides that a kind of volume is more light and handy, measuring accuracy is high, the log-linear xsect air quantity device of good stability.
For realizing above-mentioned purpose; The technical scheme of the utility model is a kind of log-linear xsect air quantity device of design; Comprise measuring tube, the longshore current direction of flow sets gradually grid type rectifier, positive pressure measuring body and the negative pressure measuring body axially vertical with measuring tube in the measuring tube; Positive pressure measuring body comprises at least two positive pressure bourdon's tubes; Each positive pressure bourdon's tube is positioned at axially vertical plane of same and measuring tube; Each positive pressure bourdon's tube is provided with five positive pressure measured holes by log-linear measurement; Positive pressure measured hole is over against direction of flow, and each positive pressure bourdon's tube connects and is connected in positive impulse house steward; Negative pressure measuring body comprises at least two negative pressure bourdon's tubes; Each negative pressure bourdon's tube is positioned at axially vertical plane of same and measuring tube; Each negative pressure bourdon's tube is provided with five negative pressure measured holes by log-linear measurement; Negative pressure measured hole is back to direction of flow, and each negative pressure bourdon's tube connects and is connected in negative impulse house steward.
Preferably, said measuring tube two ends are provided with connecting flange.
Preferably, said negative pressure measuring body is provided with the blowdown joint in the measuring tube outside.
Preferably, said positive pressure measuring body is provided with the blowdown joint in the measuring tube outside.
Preferably, said each positive pressure bourdon's tube is vertical with positive impulse house steward.
Preferably, said each negative pressure bourdon's tube is vertical with negative impulse house steward.
Preferably, said positive pressure bourdon's tube is identical with the quantity of negative pressure bourdon's tube.
Preferably, said positive pressure bourdon's tube and negative pressure bourdon's tube are staggered.
Preferably, said positive impulse house steward and negative impulse house steward are parallel to each other.
When fluid is flowed through the grid type rectifier; Make fluid near typical, full-blown disturbed flow condition; And the ideal fluid (being straight line) that does not have whirlpool; Thereby make this device more stable when measuring flow, and it is shorter to make this install desired straight length, has satisfied the harsh conditions of on-the-spot use.Do not require that generally band upstream and downstream measuring tube is short, only needing device body length to install to get final product (only needs 260-300mm).
The pressure port measurement of the positive and negative pressure measuring body of said device designs by log-linear measurement, and what its each pressure port measured is the pressure under the fluid mean flow rate, thus measure more accurate reliably, and applicable to the air measuring of square tube and pipe.
The advantage and the beneficial effect of the utility model are: provide that a kind of volume is more light and handy, measuring accuracy is high, the log-linear xsect air quantity device of good stability.And this log-linear xsect air quantity apparatus structure is simple, reasonable in design, has good practicability.
Compare common differential pressure flowmeter, the utility model:
A. measure and stablize, precision is high, and flow velocity is uniform and stable
Because the pressure port on the flute shape measuring body is provided with by log-linear measurement, what its each pressure port measured is the pressure under the fluid mean flow rate, so measure more accurate reliable;
B. straight length requires extremely short
Because log-linear xsect apparatus for measuring air quantity carries honeycomb screen, so do not require that generally band upstream and downstream measuring tube is short, only needing device body length to install to get final product (only needs 260-300mm);
C. dirt, difficult stifled bears dirty
Log-linear xsect apparatus for measuring air quantity is multimetering, does not influence measurement so stop up for the pressure port of property once in a while, and device is provided with dust exhaust, can irregularly carry out dust discharge, makes its anti-blocking performance better;
D. the permanent compression loss is little
Because log-linear xsect apparatus for measuring air quantity choked flow piece can be ignored, so the permanent crushing that produces can be ignored;
E. convenient for installation and maintenance
On-the-spot installation only need directly be welded with pipeline and got final product, and the long-time running good stability, and maintenance workload is minimum.
Because the utility model log-linear xsect apparatus for measuring air quantity is mainly used on the air measuring; Different according to the material selected for use, maximum operating temperature can reach 540 ℃, and pressure rating is generally worked down at≤2.5MPa pressure condition; And body does not have detachable block, does not have the possibility of leakage.Therefore this device can be under various complex working condition conditions steady operation.
Description of drawings
Fig. 1 is the front elevation of the utility model;
Fig. 2 is the side view of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the embodiment of the utility model is further described.Following examples only are used for more clearly explaining the technical scheme of the utility model, and can not limit the protection domain of the utility model with this.
The technical scheme of the utility model practical implementation is:
A kind of log-linear xsect air quantity device comprises measuring tube 1, and the longshore current direction of flow sets gradually grid type rectifier 2, positive pressure measuring body and the negative pressure measuring body axially vertical with measuring tube 1 in the measuring tube 1; Positive pressure measuring body comprises at least two positive pressure bourdon's tubes 3; Each positive pressure bourdon's tube 3 is positioned at same and measuring tube 1 axial vertical plane; Each positive pressure bourdon's tube 3 is provided with five positive pressure measured holes by log-linear measurement; Positive pressure measured hole is over against direction of flow, and each positive pressure bourdon's tube 3 connects and is connected in positive impulse house steward 4; Negative pressure measuring body comprises at least two negative pressure bourdon's tubes 5; Each negative pressure bourdon's tube 5 is positioned at same and measuring tube 1 axial vertical plane; Each negative pressure bourdon's tube 5 is provided with five negative pressure measured holes by log-linear measurement; Negative pressure measured hole is back to direction of flow, and each negative pressure bourdon's tube 5 connects and is connected in negative impulse house steward 6.Said measuring tube 1 two ends are provided with connecting flange 7.Said negative pressure measuring body is provided with blowdown joint 8 in measuring tube 1 outside.Said positive pressure measuring body is provided with blowdown joint 8 in measuring tube 1 outside.Said each positive pressure bourdon's tube 3 is vertical with positive impulse house steward 4.Said each negative pressure bourdon's tube 5 is vertical with negative impulse house steward 6.Said positive pressure bourdon's tube 3 is identical with the quantity of negative pressure bourdon's tube 5.Said positive pressure bourdon's tube 3 is staggered with negative pressure bourdon's tube 5.Said positive impulse house steward 4 is parallel to each other with negative impulse house steward 6.
The above only is the preferred implementation of the utility model; Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model know-why, can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (9)
1. a log-linear xsect air quantity device is characterized in that, comprises measuring tube, and the longshore current direction of flow sets gradually grid type rectifier, positive pressure measuring body and the negative pressure measuring body axially vertical with measuring tube in the measuring tube; Positive pressure measuring body comprises at least two positive pressure bourdon's tubes; Each positive pressure bourdon's tube is positioned at axially vertical plane of same and measuring tube; Each positive pressure bourdon's tube is provided with five positive pressure measured holes by log-linear measurement; Positive pressure measured hole is over against direction of flow, and each positive pressure bourdon's tube connects and is connected in positive impulse house steward; Negative pressure measuring body comprises at least two negative pressure bourdon's tubes; Each negative pressure bourdon's tube is positioned at axially vertical plane of same and measuring tube; Each negative pressure bourdon's tube is provided with five negative pressure measured holes by log-linear measurement; Negative pressure measured hole is back to direction of flow, and each negative pressure bourdon's tube connects and is connected in negative impulse house steward.
2. log-linear xsect air quantity device according to claim 1 is characterized in that said measuring tube two ends are provided with connecting flange.
3. log-linear xsect air quantity device according to claim 1 is characterized in that said negative pressure measuring body is provided with the blowdown joint in the measuring tube outside.
4. log-linear xsect air quantity device according to claim 1 is characterized in that said positive pressure measuring body is provided with the blowdown joint in the measuring tube outside.
5. log-linear xsect air quantity device according to claim 1 is characterized in that, said each positive pressure bourdon's tube is vertical with positive impulse house steward.
6. log-linear xsect air quantity device according to claim 1 is characterized in that, said each negative pressure bourdon's tube is vertical with negative impulse house steward.
7. log-linear xsect air quantity device according to claim 1 is characterized in that said positive pressure bourdon's tube is identical with the quantity of negative pressure bourdon's tube.
8. log-linear xsect air quantity device according to claim 1 is characterized in that said positive pressure bourdon's tube and negative pressure bourdon's tube are staggered.
9. log-linear xsect air quantity device according to claim 1 is characterized in that said positive impulse house steward and negative impulse house steward are parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220273959 CN202631019U (en) | 2012-06-11 | 2012-06-11 | Log-linear cross section air volume device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220273959 CN202631019U (en) | 2012-06-11 | 2012-06-11 | Log-linear cross section air volume device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631019U true CN202631019U (en) | 2012-12-26 |
Family
ID=47384212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220273959 Expired - Fee Related CN202631019U (en) | 2012-06-11 | 2012-06-11 | Log-linear cross section air volume device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202631019U (en) |
-
2012
- 2012-06-11 CN CN 201220273959 patent/CN202631019U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20170611 |