CN201548269U - On-line flow metering device for boiler smoke dust pipeline - Google Patents
On-line flow metering device for boiler smoke dust pipeline Download PDFInfo
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- CN201548269U CN201548269U CN2009203155174U CN200920315517U CN201548269U CN 201548269 U CN201548269 U CN 201548269U CN 2009203155174 U CN2009203155174 U CN 2009203155174U CN 200920315517 U CN200920315517 U CN 200920315517U CN 201548269 U CN201548269 U CN 201548269U
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- pressure
- static pressure
- differential pressure
- pressure transmitter
- smoke dust
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Abstract
The utility model relates to an on-line flow metering device for a boiler smoke dust pipeline, which includes an exhaust pipe; a U-shaped annubar flowmeter with a windward pressure aperture on the lower end and a large aperture diameter static pressure sampling pipe are arranged in the exhaust pipe; a bypass flow branch pipe is connected on one end of the U-shaped annubar flowmeter; a static pressure sampling branch pipe is connected on the upper end of the static pressure sampling pipe; one of the output path of the static pressure sampling branch pipe is connected with a micro differential pressure transmitter; and the other path is connected with a pressure transmitter; the bypass flow branch pipe of the U-shaped annubar flowmeter is connected on the other end of the micro differential pressure transmitter; the pressure signal lines of the micro differential pressure transmitter and the pressure transmitter are respectively connected to an input end of an intelligent host; a temperature sensor is arranged on the exhaust pipe; and the signal line of the temperature sensor is connected to the input end of the intelligent host. The on-line flow metering device for the boiler smoke dust pipeline solves the problem of block in the dust airflow flow metering process, and has high intelligent degree and simple structure.
Description
Technical field
The utility model relates to a kind of online flow measurement device of boiler smoke dust-laden pipeline that is used for, and belongs to the flow rate test field.
Background technology
The instrument of measuring fluid flow is referred to as flowmeter or flowmeter. and flowmeter is one of instrument important in the commercial measurement. along with industrial development, requirement to the accuracy of flow measurement and scope is more and more higher, flow measurement technology is maked rapid progress. and in order to adapt to various uses, various types of flowmeters are come out one after another.The flowmeter that has come into operation at present is above 100 kinds.
Differential pressure flowmeter is made up of primary device and secondary device.Primary device claims flow measuring element, and it is installed in the pipeline of detected fluid, produces and the proportional pressure differential of flow (flow velocity), carries out flow for secondary device and shows.Secondary device claims Displaying Meter.Its receives the differential pressure signal that measuring sensor produces, and is converted into corresponding flow and shows. and the primary device of differential pressure flowmeter often is restriction device or dynamic pressure determinator (pitot tube, even speed tube etc.).Secondary device is that various mechanical types, electronic type, combined type differential pressure gauge are equipped with flow displaying instrument, and the differential pressure sensitive element of differential pressure gauge mostly is flexible member.This method of differential pressure measurement flow of utilizing is with a long history, comparative maturity, and countries in the world generally all are used in important occasion, account for 70% of various flow measurement modes.This table meter is all adopted in the flow measurement of generating plant main steam, feedwater, condensate water etc.
The differential pressure flowmeter that use existing fuel-burning power plant as 90102884.3 and 99250211.X as described in, characteristics such as that mean velocity tube flowmeter has is simple in structure, processing ease, precision height, favorable reproducibility, long service life can adapt to the measurement of media such as waste gas, flue gas, air.But for being used for fuel-burning power plant power transportation pipe and flue flow measurement, because of containing a large amount of particles in the flue, long-play can cause the obstruction of even speed tube pressure pipe, influences the accuracy and the measuring accuracy of flow measurement.
Summary of the invention
The utility model purpose is that a kind of online flow measurement device of boiler smoke dust-laden pipeline that is used for will be provided, and this device can effectively solve for a long time, have blockage problem in the dust-contained airflow flow measurement, and intelligent degree height is simple in structure.
Its solution is: a kind of online flow measurement device of boiler smoke dust-laden pipeline that is used for, comprise exhaust duct, and it is characterized in that being provided with in the described exhaust duct lower end and have down with the wind to the U of pressure aperture type even speed tube and large aperture static pressure stopple coupon; One termination of described U type even speed tube has the by-pass flow arm; The upper end of described static pressure stopple coupon is connected to static pressure sampling arm; Described static pressure sampling arm is exported one the tunnel and is connect differential pressure transmitter, and another road connects pressure unit; The by-pass flow arm of described U type even speed tube is connected with the other end of differential pressure transmitter; The pressure signal line of described differential pressure transmitter and pressure unit is connected to the input end of smart host respectively; Also be provided with temperature sensor on the described exhaust duct; The signal wire of described temperature sensor inserts the input end of smart host.
Advantage of the present utility model is:
1) adopts Novel U-shaped even speed tube, solve original even speed tube air-flow blowback even speed tube pressure port that weares and teares for a long time and throw into question;
2) the static pressure stopple coupon adopts the large aperture stainless-steel tube, solves the blockage problem that exists;
3) this device is sent into pressure, temperature signal in the smart host, satisfies the accuracy of flow measurement;
4) design pulse gas blow device is finished on-line automatic purging, and this online flow measurement device satisfies flow measurement problem when dustiness is higher in the boiler tail flue gas fully.
Description of drawings
Fig. 1 the utility model structural representation
Fig. 2 the utility model partial view
1-exhaust duct 2-U type even speed tube 3-static pressure stopple coupon 4-by-pass flow arm 5-static pressure sampling arm 6-differential pressure transmitter 7-pressure unit 8-smart host 9-temperature sensor 10-stop valve 11-air compressor machine 12-solenoid valve
Embodiment
A kind of online flow measurement device of boiler smoke dust-laden pipeline that is used for of the present utility model comprises exhaust duct 1, it is characterized in that being provided with in the described exhaust duct 1 lower end and has down with the wind to the U of pressure aperture type even speed tube 2 and static pressure stopple coupon 3; One termination of described U type even speed tube 2 has by-pass flow arm 4; The upper end of described static pressure stopple coupon 3 is connected to static pressure sampling arm 5; 5 outputs one tunnel of described static pressure sampling arm connect differential pressure transmitter 6, and another road connects pressure unit 7; The by-pass flow arm 4 of described U type even speed tube 2 is connected with the other end of differential pressure transmitter 6; The pressure signal line of described differential pressure transmitter 6 and pressure unit 7 is connected to the input end of smart host 8 respectively; Also be provided with temperature sensor 9 on the described exhaust duct 1; The signal wire of described temperature sensor 9 inserts the input end of smart host 8.
The two ends of above-mentioned static pressure stopple coupon 3 upper ends and U type even speed tube 2 are respectively arranged with stop valve 10; The stop valve 10 of described U type even speed tube one side is connected with the output terminal of air compressor machine 11; Between described by-pass flow arm 4 and the differential pressure transmitter 6, be respectively arranged with solenoid valve 12 between static pressure sampling arm 3 and differential pressure transmitter 6 and the pressure unit 7.
Above-mentioned static pressure stopple coupon adopts the large aperture stainless-steel tube.
Above-mentioned smart host 8 adopts the flow rate calculation instrument, finish pressure, temperature correction after, the flow rate calculation instrument is finished demonstration, the output of flow.
Above-mentioned solenoid valve 12 adopts normal-open electromagnetic valve.
Above-mentioned U type even speed tube 2 is met airflow direction pressure aperture according to National Standard GB/T13931-2002 " standard arrangement, but U type even speed tube 2 is installed on the same coil cap with static pressure stopple coupon 3, pipe cap and existing boiler smoke dust-laden pipeline instrument connection are complementary, easily installation and removal.
Above-mentioned differential pressure transmitter 6 provides DC24V power supply with pressure unit 7 by smart host 3, shows current pressure and dynamic pressure value, and feeds back 4 ~ 20mA electric current and give smart host 3.
When U type even speed tube 2 needs to purge, time relay opening power, air compressor machine 11 is started working, behind the work 25S, after pressure reaches rated pressure, solenoid valve 12 cuts out, behind the time-delay 5S, stop valve 10 is opened, and finishes U type even speed tube 2 and purges, the static pressure stopple coupon is finished purging automatically under pipeline 1 negative pressure condition after stop valve 10 is opened.After purging finishes, the 5S that delays time once more, the air compressor machine drain solenoid valve is opened, and finishes the compressor drainage works.
When needing repeatedly to jet in one day, only need the time relay is set, existing system was set and can be reached 14 times in one day, satisfied far away and used needs.
The utility model is novel, and is reasonable in design, has bigger promotional value.
Claims (3)
1. one kind is used for the online flow measurement device of boiler smoke dust-laden pipeline, comprises exhaust duct, it is characterized in that being provided with in the described exhaust duct lower end and has down with the wind to the U of pressure aperture type even speed tube and large aperture static pressure stopple coupon; One termination of described U type even speed tube has the by-pass flow arm; The upper end of described static pressure stopple coupon is connected to static pressure sampling arm; Described static pressure sampling arm is exported one the tunnel and is connect differential pressure transmitter, and another road connects pressure unit; The by-pass flow arm of described U type even speed tube is connected with the other end of differential pressure transmitter; The pressure signal line of described differential pressure transmitter and pressure unit is connected to the input end of smart host respectively; Also be provided with temperature sensor on the described exhaust duct; The signal wire of described temperature sensor inserts the input end of smart host.
2. according to the described a kind of online flow measurement device of boiler smoke dust-laden pipeline that is used for of claim 1, it is characterized in that: the two ends of described static pressure stopple coupon upper end and U type even speed tube are respectively arranged with stop valve; The stop valve of described U type even speed tube one side is connected with the output terminal of air compressor machine; Between described by-pass flow arm and the differential pressure transmitter, be respectively arranged with solenoid valve between static pressure sampling arm and differential pressure transmitter and the pressure unit.
3. according to the described a kind of online flow measurement device of boiler smoke dust-laden pipeline that is used for of claim 1, it is characterized in that: described static pressure stopple coupon adopts the large aperture stainless-steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203155174U CN201548269U (en) | 2009-11-23 | 2009-11-23 | On-line flow metering device for boiler smoke dust pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203155174U CN201548269U (en) | 2009-11-23 | 2009-11-23 | On-line flow metering device for boiler smoke dust pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548269U true CN201548269U (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203155174U Expired - Fee Related CN201548269U (en) | 2009-11-23 | 2009-11-23 | On-line flow metering device for boiler smoke dust pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201548269U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697709A (en) * | 2014-12-05 | 2015-06-10 | 泽尼特泵业（苏州）有限公司 | Sewage pressure data acquisition system |
| CN111537137A (en) * | 2020-05-19 | 2020-08-14 | 天津中材工程研究中心有限公司 | Static pressure measurement method for dust-containing gas pipeline |
-
2009
- 2009-11-23 CN CN2009203155174U patent/CN201548269U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697709A (en) * | 2014-12-05 | 2015-06-10 | 泽尼特泵业（苏州）有限公司 | Sewage pressure data acquisition system |
| CN111537137A (en) * | 2020-05-19 | 2020-08-14 | 天津中材工程研究中心有限公司 | Static pressure measurement method for dust-containing gas pipeline |
| CN111537137B (en) * | 2020-05-19 | 2021-09-14 | 天津中材工程研究中心有限公司 | Static pressure measurement method for dust-containing gas pipeline |
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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 |
Granted publication date: 20100811 Termination date: 20151123 |