CN2672621Y - Porous even speed wind amount measurer - Google Patents
Porous even speed wind amount measurer Download PDFInfo
- Publication number
- CN2672621Y CN2672621Y CN 200420019472 CN200420019472U CN2672621Y CN 2672621 Y CN2672621 Y CN 2672621Y CN 200420019472 CN200420019472 CN 200420019472 CN 200420019472 U CN200420019472 U CN 200420019472U CN 2672621 Y CN2672621 Y CN 2672621Y
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- pressure tube
- measuring
- tube
- utility
- static
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Abstract
The utility model relates to a porous even speed wind amount measurer, which is arranged in the duct and includes more than one sensors composing an impact pressure tube and a static pressure tube and fixed on the duct by the fixing piece, an impact-equalizing pressure tube and a static-equalizing pressure tube which are connected separately with the impact pressure tube and the equalizing pressure tube by the metal flexible tubes, and the sensors which are connected with the impact-equalizing pressure tube and the static-equalizing pressure tube by the pressure transmitting tubes. A plurality of groups measuring points are arranged on the sensors. The sensing openings are opened windward, the inner of which is a higher-pressure region. The utility model can accurately measure the wind flux in the ducts of the boiler, etc. In particular on the conditions of shorter straight tube section and duct with big tube diameter, the utility model can conquer the disadvantages that the measuring error of the wind amount measurer existing is big and the pressure losing is big. Because the utility mode is multipoint measuring, has not the puzzle of the non-linear value k of the traditional wind amount measurer, and has an invariable value k. Thus the workload of the calibration on site is reduced and the accuracy of the wind amount measuring is increased. The advantages are greatly expressed. The structure of the utility model is simple. The installation and the maintenance are convenient.
Description
Technical field
The utility model relates to the measurement mechanism of indication air quantity size, particularly a kind of porous average rate apparatus for measuring air quantity that is applicable to straight length than short and large section duct.
Background technology
For a long time, the boiler air measuring adopts measuring sensors such as venturi, airfoil type device to measure mostly.These all are traditional gas flow measurement devices of standard, when condition such as straight length satisfies at the scene, can measure air quantity more exactly.But, when variable working condition owing to need the correction of non-linear k value, use cumbersome, and at the scene straight length more in short-term, measuring accuracy can not get assurance, measuring error is bigger.Airfoil type measurement mechanism volume is bigger, and crushing is bigger, manufacturing process more complicated, and easy jam signal pipeline.Employing standard Venturi tube, when big caliber, straight length requires very longly before and after it, and cost is very high.And in fact, in the design arrangement of the coal pulverizer air channel of boiler unit pulverized-coal system, be difficult to satisfy these conventional air measuring sensors and accurately measure desired flow development length.In the design arrangement of boiler air channel,, often can not provide enough flow development lengths for these conventional air measuring sensors in order to arrange compactness.
Along with the raising of national requirements for environmental protection, power plant must control the discharging of the discharging of pollutant, particularly nitrogen dioxide, certainly will will carry out burning optimization control like this, and the accuracy of air measuring is to carry out the basic demand of combustion with reduced pollutants.Estimate when each power plant faces the emission request of increasingly stringent, will increase the demand of air measuring accuracy.The user is under the situation of existing air channel straight length to the requirement of air measuring, promptly not to change the air channel to arrange because the air quantity device is installed, requirement measuring accuracy height, good stability, convenient for installation and maintenance, reduce normal operating maintenance workload, and the pressure loss is little as far as possible, so that the air channel blast in the reduction boiler operatiopn, thereby reduce the blower fan power consumption.
Summary of the invention
Task of the present utility model provides a kind of porous average rate apparatus for measuring air quantity, and it has solved the existing apparatus for measuring air quantity problem that the air measuring error is big and the pressure loss is big under the situation of the short and big caliber air channel of straight length.
The technical solution of the utility model is as follows:
A kind of porous average rate apparatus for measuring air quantity, it is placed in the air channel, it comprises and being placed in more than one being formed and be fixed on sensor on the air channel by fixture by ram-air pipe and static tube in the air channel, be connected total head balance pipe and static pressure balance pipe outside the air channel and the transmitter that respectively is connected with the static pressure balance pipe with ram-air pipe and static tube respectively by metal hose by pressure tube and total head balance pipe; The array measurement point is set on the described sensor, and sensing port is offered down with the wind, and its inside is the higher-pressure region.
Porous average rate apparatus for measuring air quantity of the present utility model can accurately be measured the air quantity flow in air channel such as boiler, especially can overcome the existing shortcoming that the apparatus for measuring air quantity measuring error is big, the pressure loss is big under the situation of the short and big caliber air channel of straight length.The utility model is because multimetering and the puzzlement that do not have the non-linear k value of traditional air quantity device when air quantity changes have constant k value, thereby can reduce the workload of on-site proving and the degree of accuracy of raising air measuring, more can embody its superiority.
Apparatus for measuring air quantity of the present utility model is simple in structure, and is convenient for installation and maintenance.
Description of drawings
Fig. 1 is the structural representation of a kind of porous average rate apparatus for measuring air quantity of the present utility model.
Fig. 2 is the scheme of installation of Fig. 1 apparatus for measuring air quantity.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of porous average rate apparatus for measuring air quantity of the present utility model is placed in the air channel 1, and air channel 1 is fixing by mounting flange 11 and set bolt 12.Apparatus for measuring air quantity is equipped with one with upper sensor 2 in air channel 1, four sensors 2 are housed in the air channel 1 of Fig. 1.
Sensor 2 is made up of ram-air pipe 3 and static tube 4, and ram-air pipe 3 and static tube 4 are fixed on the air channel 1 by fixture 5.Ram-air pipe 3 and static tube 4 are connected with static pressure balance pipe 8 by the heat resisting and pressure resisting metal hose 6 total head balance pipe 7 outer with being placed in air channel 1 respectively.Total head balance pipe 7 and static pressure balance pipe 8 are respectively by being connected with transmitter 13 with pressure tube 10.Between total head balance pipe 7 and static pressure balance pipe 8 and the pressure tube 10 isolation valve 9 is housed.
Because the unevenness of the air-flow in the actual air channel of boiler, the utility model adopt many group measurement points to satisfy the requirement of measuring accuracy.Specifically, be that the array measurement point is set on each sensor, in the air channel, arrange a plurality of sensors then, these sensors are together in parallel, the ram-air pipe that is each sensor is connected to a total head balance pipe, again static tube is connected to another root static pressure balance pipe, is connected to transmitter by pressure tube respectively from total head balance pipe and static pressure balance pipe at last.
Because no fluid flows in the air measuring sensor, and sensing port offers down with the wind, and its inside is the higher-pressure region, and this has just significantly reduced the possibility of the interior impurity obstruction of fluid sensing port.
Claims (2)
1. porous average rate apparatus for measuring air quantity, it is placed in the air channel, it is characterized in that, it comprises and being placed in more than one being formed and be fixed on sensor on the air channel by fixture by ram-air pipe and static tube in the air channel, be connected total head balance pipe and static pressure balance pipe outside the air channel and the transmitter that respectively is connected with the static pressure balance pipe with ram-air pipe and static tube respectively by metal hose by pressure tube and total head balance pipe; The array measurement point is set on the described sensor, and sensing port is offered down with the wind, and its inside is the higher-pressure region.
2. porous average rate apparatus for measuring air quantity according to claim 1 is characterized in that, between described total head balance pipe and static pressure balance pipe and the pressure tube isolation valve is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019472 CN2672621Y (en) | 2004-01-14 | 2004-01-14 | Porous even speed wind amount measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019472 CN2672621Y (en) | 2004-01-14 | 2004-01-14 | Porous even speed wind amount measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2672621Y true CN2672621Y (en) | 2005-01-19 |
Family
ID=34483145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019472 Expired - Lifetime CN2672621Y (en) | 2004-01-14 | 2004-01-14 | Porous even speed wind amount measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2672621Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620879A (en) * | 2012-03-29 | 2012-08-01 | 东方电气集团东方电机有限公司 | Multichannel micro-pressure measurement system for motor ventilation model tests |
| CN103336141A (en) * | 2013-06-20 | 2013-10-02 | 国家电网公司 | Wind speed and wind volume measuring device based on static pressure principle |
| CN105444833A (en) * | 2015-12-22 | 2016-03-30 | 南京天臣恒科技有限公司 | Pressure equalizing chamber, mounting method thereof and three-dimension space multi-point pressure measuring and cross section type gas flow measuring device containing pressure equalizing chamber |
| CN105650021A (en) * | 2016-03-01 | 2016-06-08 | 叶露微 | Measuring device for air quantity of horizontal axis air circulating fan |
| WO2024082764A1 (en) * | 2022-10-19 | 2024-04-25 | 西安京兆电力科技有限公司 | Air volume measurement and correction method for air duct of non-uniform air field |
-
2004
- 2004-01-14 CN CN 200420019472 patent/CN2672621Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620879A (en) * | 2012-03-29 | 2012-08-01 | 东方电气集团东方电机有限公司 | Multichannel micro-pressure measurement system for motor ventilation model tests |
| CN103336141A (en) * | 2013-06-20 | 2013-10-02 | 国家电网公司 | Wind speed and wind volume measuring device based on static pressure principle |
| CN105444833A (en) * | 2015-12-22 | 2016-03-30 | 南京天臣恒科技有限公司 | Pressure equalizing chamber, mounting method thereof and three-dimension space multi-point pressure measuring and cross section type gas flow measuring device containing pressure equalizing chamber |
| CN105444833B (en) * | 2015-12-22 | 2018-10-19 | 南京铂锐能源科技有限公司 | A kind of equal pressure chamber, its installation method and the section formula gas flow surveying instrument comprising it |
| CN105650021A (en) * | 2016-03-01 | 2016-06-08 | 叶露微 | Measuring device for air quantity of horizontal axis air circulating fan |
| CN105650021B (en) * | 2016-03-01 | 2019-03-15 | 广州市先河技术工程有限公司 | Circulation flow with the horizontal axis pectinid measuring device |
| WO2024082764A1 (en) * | 2022-10-19 | 2024-04-25 | 西安京兆电力科技有限公司 | Air volume measurement and correction method for air duct of non-uniform air field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUADONG RESEARCH INST OF ELECTRIC POWER EXPERIMEN Free format text: FORMER OWNER: HUADONG RESEARCH INST OF ELECTRIC POWER EXPERIMENT Effective date: 20071116 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071116 Address after: 200437 No. 171, Handan Road, Shanghai Co-patentee after: Shanghai Minghua Electric Power Technology Engineering Co., Ltd. Patentee after: East China Electric Power Test & Research Institute Co., Ltd. Address before: 200437 No. 171, Handan Road, Shanghai Patentee before: Huadong Research Inst of Electric Power Experiment |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140114 Granted publication date: 20050119 |