CN204188643U - Pitot tube primary air velocity self-operated measuring unit - Google Patents
Pitot tube primary air velocity self-operated measuring unit Download PDFInfo
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- CN204188643U CN204188643U CN201420615802.9U CN201420615802U CN204188643U CN 204188643 U CN204188643 U CN 204188643U CN 201420615802 U CN201420615802 U CN 201420615802U CN 204188643 U CN204188643 U CN 204188643U
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- pitot tube
- primary air
- air velocity
- measuring unit
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Abstract
The utility model discloses pitot tube primary air velocity self-operated measuring unit, comprise pitot tube, one end of pitot tube is fixed on the measuring point of primary air piping by the first stationary installation, the other end of pitot tube is connected with differential pressure gauge, and pitot tube is connected with screw by the second stationary installation, and screw is connected with driving leading screw, leading screw is driven to be connected with drive motor, drive motor is connected with controller, and controller is also connected with optoelectronic switch, and the first stationary installation is also connected with kerve.By the control system that optoelectronic switch, motor and PLC process of measurement form, achieve the automatic measurement that primary air velocity measured by pitot tube, instead of the metering system that tradition pulls pitot tube, improve measurement accuracy, measure while each primary air velocity can be realized.
Description
Technical field
The utility model relates to pitot tube primary air velocity self-operated measuring unit.
Background technology
In station boiler thermal test process, usually need to carry out leveling to boiler First air.The measuring method of national Specification is: according to the principle waiting ring cross section, in each primary air piping pipe, measure hydrodynamic with standard pitot tube and calculate the corresponding wind speed of airduct, calculate the primary air velocity deviation of grinding four airducts on the same stage, then according to measurement result, primary air piping shrinkage cavity is adjusted, again measure after adjustment, carry out and so forth adjusting and measures, until coal pulverizer export four primary air piping wind speed deviations within ± 5% after terminate to adjust.Needing the caliber according to airduct before measurement, making scale according to waiting principle in ring cross section.During measurement, a people lifts scale along direction of measurement is flat, and another person is responsible for pulling pitot tube, when being drawn to the measurement point under the mark on scale when pitot tube, being read by the 3rd people and is recorded differential pressure value.Then the differential pressure value according to said method write down successively etc. on ring Section Point calculates this manage-style speed.
In actual measurement, we find some problem of below present measuring system existence.
1, present wind speed measuring device needs three people to cooperate, and have at least two people just must can complete measurement on measuring point side, but the wind speed point position or high or low of power plant, operating space is also very narrow and small, add First air leveling test and need repeated measurement airduct wind speed, this means that whenever remeasuring, have at least two survey crews all again will climb to measuring point side completes measurement, workload is very large.
2, cannot realize measuring simultaneously; As noted earlier, measuring a primary air piping wind speed needs 3 people to cooperate, if will measure four primary air piping of a mill simultaneously, needs 12 people, is difficult to realize in actual measurement.Because operating mode is not that absolute stability is constant, each airduct wind speed can not be measured simultaneously and can exchange flat rubber belting and carry out adverse effect.
3, can find that scale determines the position of measurement point in the measurements, and hand-held scale subsidiary brings error to measurement result.
Utility model content
For solving the deficiency that prior art exists, the utility model discloses pitot tube primary air velocity self-operated measuring unit, this device only needs people's operation, realize automatically measuring, eliminate the work pulling pitot tube and hand-held scale, significantly reduce workload, the needs simultaneously measured can be met, reduce personal error, achieve Measurement accuracy.
For achieving the above object, concrete scheme of the present utility model is as follows:
Pitot tube primary air velocity self-operated measuring unit, comprise pitot tube, one end of pitot tube is fixed on the measuring point of primary air piping by the first stationary installation, the other end of pitot tube is connected with differential pressure gauge, and pitot tube is connected with screw by the second stationary installation, and screw is connected with driving leading screw, leading screw is driven to be connected with drive motor, drive motor is connected with controller, and controller is also connected with optoelectronic switch, and the first stationary installation is also connected with kerve.
The fixing plug that described first stationary installation comprises geometrical clamp and is connected with geometrical clamp, fixing plug is connected with standard pitot tube.
The other end of described pitot tube is connected with differential pressure gauge by two branch roads;
Described two branch roads are emulsion tube.
Described second stationary installation is pitot tube geometrical clamp, and pitot tube geometrical clamp is connected with screw.
Described optoelectronic switch is reflection type mirror optoelectronic switch, comprises the optoelectronic switch transmitter on the coupling arrangement that is arranged between pitot tube geometrical clamp and screw and is attached to the reflective paster of optoelectronic switch on kerve surface.Coupling arrangement is connecting link.
Described controller is PLC, and controller is provided with switch.
Described drive motor is also provided with register lamp.
Described pitot tube is standard pitot tube.
By fixing plug and geometrical clamp, whole measurement mechanism is fixed on the measuring point of primary air piping.Standard pitot tube is fixed on nut by pitot tube geometrical clamp and fastening bolt.Pitot tube differential pressure is introduced differential pressure gauge by emulsion tube, and emulsion tube length is advisable to be convenient for measuring.Screw is connected with driving leading screw.Drive motor drives and drives screw turns, and screw turns drives standard pitot tube and optoelectronic switch transmitter to move radially along primary air piping by screw.Device optoelectronic switch used is mirror surface reflecting type optoelectronic switch, and when optoelectronic switch transmitter moves to reflective paster place, the light beam that transmitter sends is returned receiver by reflective paster reflection, produces a switching signal and feeds back to PLC.The reflective paster of optoelectronic switch waits ring method of section to calculate in the paste position foundation of kerve.Survey crew record differential pressure when register lamp is bright.PLC receives photoelectric switching signal and controls electric machine rotation.
The beneficial effects of the utility model:
1, the driving mechanism consisted of motor, leading screw and screw realizes imitation to the action pulling pitot tube and replacement.
2, by optoelectronic switch reflective paster, measurement point is positioned, avoid the error of hand-held tape measure, the accuracy of measurement is improved.The paste position of reflective paster is according to airduct internal diameter and wait ring method of section to calculate.
3, by the combination of geometrical clamp, kerve and fixing plug, measurement mechanism is fixed on tube wall.
4, by control system that optoelectronic switch, motor and PLC process of measurement form, achieve the automatic measurement that primary air velocity measured by pitot tube, instead of the metering system that tradition pulls pitot tube, improve measurement accuracy, measure while each primary air velocity can be realized.
Accompanying drawing explanation
Fig. 1 is pitot tube primary air velocity self-operated measuring unit side view;
Fig. 2 is pitot tube primary air velocity self-operated measuring unit A-A schematic cross-section;
In figure, 1-geometrical clamp; 2-fixes plug; 3-standard pitot tube; 4-pitot tube geometrical clamp; 5-kerve; 6-emulsion tube; 7-differential pressure gauge; 8-drives leading screw; 9-optoelectronic switch transmitter; 10-screw; The reflective paster of 11-optoelectronic switch; 12-PLC controller; 13-measures switch; 14-drive motor; 15-register lamp; 16-fastening bolt.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in detail:
As shown in Figure 1, pitot tube primary air velocity self-operated measuring unit, comprise standard pitot tube 3, one end of standard pitot tube 3 is fixed on the measuring point of primary air piping by the first stationary installation, the other end is connected with differential pressure gauge 7 by two branch roads, standard pitot tube 3 is connected with screw 10 by the second stationary installation, screw 10 is connected with driving leading screw 8, leading screw 8 is driven to be connected with drive motor 14, drive motor 14 is connected with controller, controller is also connected with optoelectronic switch, and the first stationary installation is also connected with kerve 5.
The fixing plug 2 that first stationary installation comprises geometrical clamp 1 and is connected with geometrical clamp 1, fixing plug 2 is connected with standard pitot tube 3, and two branch roads are emulsion tube 6.Second stationary installation is pitot tube geometrical clamp 4, and pitot tube geometrical clamp 4 is connected with screw 10.Optoelectronic switch is reflection type mirror optoelectronic switch, comprises the optoelectronic switch transmitter 9 on the coupling arrangement that is arranged between pitot tube geometrical clamp 4 and screw 10 and is attached to the reflective paster 11 of optoelectronic switch on kerve 5 surface.Controller is PLC 12, and controller is provided with measures switch 13.Drive motor 14 is also provided with register lamp 15.
The course of work and principle:
Measurement mechanism is fixed on primary air piping measuring point, pitot tube measuring junction is placed in primary air piping, the pitot tube other end is fixed together by pitot tube geometrical clamp 4 and screw 10, drives pitot tube measuring junction to move horizontally in airduct when drive motor 14 is rotated.If space is less near wind speed measuring point, pitot tube differential pressure can be guided to the nearest platform place be convenient for measuring by emulsion tube 6, read differential pressure by differential pressure gauge 7.Known airduct internal diameter, foundation waits ring method of section to calculate dynamic pressure point position, is marked at kerve 5 surface with optoelectronic switch reflection plaster paper 11.Measuring process is: connect measurement switch 13 rear drive motor 14 and rotate, standard pitot tube 3 is driven to go deep into primary air piping gradually by driving leading screw 8, optoelectronic switch transmitter 9 is also radial to close airduct direction translation along primary air piping with screw 10 simultaneously, when arriving measurement point, the light beam that optoelectronic switch transmitter 9 is launched is by optoelectronic switch reflective paster 11 reflected light electric switch transmitter 9, produce a signal, PLC 12 receives this signal post command drive motor 14 stall 1-2 minute (time can be changed), register lamp 15 is bright simultaneously, survey crew is seen the bright rear reading of lamp and is recorded pitot tube differential pressure, reciprocal successively, until after tester records all measurement point differential pressures, EOP (end of program), motor stalling.
PLC control technology is adopted to complete primary air speed measuring by receiving photoelectric switching signal control electric machine rotation in this measurement mechanism, instead of people pulls pitot tube and people to be the work carrying scale, significantly reduce the workload of people, improve measurement accuracy simultaneously.
Claims (9)
1. pitot tube primary air velocity self-operated measuring unit, it is characterized in that, comprise pitot tube, one end of pitot tube is fixed on the measuring point of primary air piping by the first stationary installation, and the other end of pitot tube is connected with differential pressure gauge, pitot tube is connected with screw by the second stationary installation, screw is connected with driving leading screw, and drive leading screw to be connected with drive motor, drive motor is connected with controller, controller is also connected with optoelectronic switch, and the first stationary installation is also connected with kerve.
2. pitot tube primary air velocity self-operated measuring unit as claimed in claim 1, is characterized in that, the fixing plug that described first stationary installation comprises geometrical clamp and is connected with geometrical clamp, and fixing plug is connected with standard pitot tube.
3. pitot tube primary air velocity self-operated measuring unit as claimed in claim 1, is characterized in that, the other end of described pitot tube is connected with differential pressure gauge by two branch roads.
4. pitot tube primary air velocity self-operated measuring unit as claimed in claim 3, it is characterized in that, described two branch roads are emulsion tube.
5. pitot tube primary air velocity self-operated measuring unit as claimed in claim 1, it is characterized in that, described second stationary installation is pitot tube geometrical clamp, and pitot tube geometrical clamp is connected with screw.
6. pitot tube primary air velocity self-operated measuring unit as claimed in claim 1, it is characterized in that, described optoelectronic switch is reflection type mirror optoelectronic switch, comprises the optoelectronic switch transmitter on the coupling arrangement that is arranged between pitot tube geometrical clamp and screw and is attached to the reflective paster of optoelectronic switch on kerve surface.
7. pitot tube primary air velocity self-operated measuring unit as claimed in claim 1, it is characterized in that, described controller is PLC, and controller is provided with switch.
8. pitot tube primary air velocity self-operated measuring unit as claimed in claim 1, is characterized in that, described drive motor is also provided with register lamp.
9. the pitot tube primary air velocity self-operated measuring unit as described in as arbitrary in claim 1-8, it is characterized in that, described pitot tube is standard pitot tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615802.9U CN204188643U (en) | 2014-10-22 | 2014-10-22 | Pitot tube primary air velocity self-operated measuring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615802.9U CN204188643U (en) | 2014-10-22 | 2014-10-22 | Pitot tube primary air velocity self-operated measuring unit |
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| Publication Number | Publication Date |
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| CN204188643U true CN204188643U (en) | 2015-03-04 |
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| CN201420615802.9U Active CN204188643U (en) | 2014-10-22 | 2014-10-22 | Pitot tube primary air velocity self-operated measuring unit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722386A (en) * | 2015-03-25 | 2015-06-24 | 广东电网有限责任公司电力科学研究院 | Air ring air speed distribution measurement and adjustment device and method of coal mill |
| CN105203796A (en) * | 2015-10-10 | 2015-12-30 | 国网山东省电力公司电力科学研究院 | Pitot tube measuring device used for primary air leveling and provided with ruler and method |
| CN105841748A (en) * | 2016-05-27 | 2016-08-10 | 中国工程物理研究院材料研究所 | Air duct atmosphere parameter measuring device |
| CN106500791A (en) * | 2016-11-04 | 2017-03-15 | 山东电力研究院 | A kind of Pitot tube automatic mobile device and measuring method with positioning function |
| CN106771340A (en) * | 2016-12-16 | 2017-05-31 | 上海华川环保科技有限公司 | A kind of differential pressure type measuring device |
| CN107525622A (en) * | 2017-09-19 | 2017-12-29 | 中国水利水电科学研究院 | L-type Pitot tube stationary positioned device |
| CN107817102A (en) * | 2017-10-31 | 2018-03-20 | 山东电力研究院 | A kind of primary air velocity leveling self-operated measuring unit |
| CN109239394A (en) * | 2018-09-29 | 2019-01-18 | 佛山科学技术学院 | A kind of photosensitive timing cement mortar speed measuring device |
| CN112986615A (en) * | 2019-12-17 | 2021-06-18 | 亚智科技股份有限公司 | Measuring device and measuring method |
-
2014
- 2014-10-22 CN CN201420615802.9U patent/CN204188643U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722386A (en) * | 2015-03-25 | 2015-06-24 | 广东电网有限责任公司电力科学研究院 | Air ring air speed distribution measurement and adjustment device and method of coal mill |
| CN104722386B (en) * | 2015-03-25 | 2017-02-22 | 广东电网有限责任公司电力科学研究院 | Air ring air speed distribution measurement and adjustment device and method of coal mill |
| CN105203796A (en) * | 2015-10-10 | 2015-12-30 | 国网山东省电力公司电力科学研究院 | Pitot tube measuring device used for primary air leveling and provided with ruler and method |
| CN105841748A (en) * | 2016-05-27 | 2016-08-10 | 中国工程物理研究院材料研究所 | Air duct atmosphere parameter measuring device |
| CN106500791A (en) * | 2016-11-04 | 2017-03-15 | 山东电力研究院 | A kind of Pitot tube automatic mobile device and measuring method with positioning function |
| CN106771340A (en) * | 2016-12-16 | 2017-05-31 | 上海华川环保科技有限公司 | A kind of differential pressure type measuring device |
| CN107525622A (en) * | 2017-09-19 | 2017-12-29 | 中国水利水电科学研究院 | L-type Pitot tube stationary positioned device |
| CN107817102A (en) * | 2017-10-31 | 2018-03-20 | 山东电力研究院 | A kind of primary air velocity leveling self-operated measuring unit |
| CN109239394A (en) * | 2018-09-29 | 2019-01-18 | 佛山科学技术学院 | A kind of photosensitive timing cement mortar speed measuring device |
| CN112986615A (en) * | 2019-12-17 | 2021-06-18 | 亚智科技股份有限公司 | Measuring device and measuring method |
| CN112986615B (en) * | 2019-12-17 | 2023-11-07 | 亚智科技股份有限公司 | Measuring device and measuring method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: Shandong Electric Power Research Institute Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: Shandong Electric Power Research Institute |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220121 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: Shandong Electric Power Research Institute |