CN100520328C - Pitot tube with function of contaminant separation - Google Patents
Pitot tube with function of contaminant separation Download PDFInfo
- Publication number
- CN100520328C CN100520328C CNB2007101404479A CN200710140447A CN100520328C CN 100520328 C CN100520328 C CN 100520328C CN B2007101404479 A CNB2007101404479 A CN B2007101404479A CN 200710140447 A CN200710140447 A CN 200710140447A CN 100520328 C CN100520328 C CN 100520328C
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- China
- Prior art keywords
- driving mechanism
- pitot tube
- draft tube
- tube
- topworks
- Prior art date
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- 239000000356 contaminant Substances 0.000 title 1
- 238000000926 separation method Methods 0.000 title 1
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract description 10
- 239000010985 leather Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 10
- 239000003500 flue dust Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011269 tar Substances 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011285 coke tar Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to a leather supporting pipe that can descale, which comprises two air-intake pipes and a casing. One end of each air-intake pipe is a probe, another end is the pipe tail. The probe ends are the air inlets of the air-intake pipes, and are staggered in axial direction, and the opening directions are opposite to each other. The invention additionally comprises a scaler, which comprises a driving link rod, a scale-scrapping actuator and a driving mechanism. The driving link rod is located between the two air-intake pipes. One end of the driving link rod is provided with the scale-scrapping actuator, which is for scrapping off the smoke scale on the air-intake ports. Another end of the driving link rod is connected with the driving mechanism, which is for generating power and is connected with a controller that is for giving action command to the driving mechanism. The casing is arranged out the two air-intake pipes and the scaler.
Description
Technical field
What the present invention relates to is a kind of measurement mechanism of flowing gas pressure, particularly be a kind of can be to dynamic pressure sample tap and static pressure sample tap, the pitot tube that the dirt that accumulates in sampling process is in time removed.
Background technology
The important device of fixed-contamination emission source pressure measurement such as present known flue, chimney, gas outlet is a S type pitot tube.See also shown in Figure 1, its pitot tube synoptic diagram that does not have choke preventing function for using in the prior art, its structure is to be made of side by side two tubes, wherein pipe sample tap over against gas flow direction to be measured, be used to measure the dynamic pressure value; Another root pipe sample tap is used to measure static pressure back to gas flow direction.Owing to contain a large amount of flue dust and tar in the tested gas, in actual measurement, find S type pitot tube in use, flue dust and tar stick on the air intake opening easily.Its exhaust flow velocity is calculated by following formula:
V
Si---measurement point discharge speed, m/s;
P
Di---measurement point exhaust dynamic pressure, Pa;
Kp---pitot tube correction coefficient;
Wet exhaust density in the pipeline under the Ps---measurement state, Kg/m3;
Learn that by following formula pressure is unimpeded relevant with the gas circuit of pitot tube, the air intake opening chocking-up degree influences the measurement of pressure, and flow velocity is relevant with Kp--pitot tube correction coefficient simultaneously, and the pitot tube correction coefficient is relevant with the sample tap sectional area.There are a large amount of flue dust and tar to stick on the sample tap in the actual measurement, directly influenced the sectional area size of air intake opening.
Find in the actual measurement that S type pitot tube sample tap is adhered to by flue dust and tar easily, result in blockage, thereby changed the sectional area size of pitot tube air intake opening, pressure measurement errors is increased, influence the measurement of other parameters such as flow velocity, also design and study for solving some project planners, Chinese patent 200320115566.6 discloses a kind of anti-blocking standard pitot tube, and it belongs to a kind of piezometry instrument of gas.See also shown in Figure 2, the synoptic diagram that has the choke preventing function pitot tube in its prior art, special feature is: pressure 15 a front end axial centre are provided with the bigger air inlet tube chamber 16 of opening that is connected with total head interface channel pipe 12, be provided with an air chamber 13 that is connected with static pressure interface channel pipe 11 at pressure 15 rear portion, place at close pressure 15 openend in the front of air chamber 13 is provided with a ring cutting groove 14 radially that is used for the static pressure air inlet, and ring cutting groove 14 A/Fs and pressure 15 diameter ratio are 1: 20-1: 8.Have 1 to communicate with air chamber to a plurality of apertures in the ring cutting groove 14.Its ways of measure pressure is the same with the primary standard pitot tube, can measure total head, static pressure, dynamic pressure simultaneously, the measuring accuracy height.Reach anti-stifled purpose by the ring cutting groove of setting up 14.But in fact along with the carrying out of service time, the turning point between ring cutting groove place 14 and air intake opening also is easy to generate obstruction, therefore still needs a kind of improvement of pitot tube structure can overcome the defective that crock stops up fully.
In view of the defective of above-mentioned existence, creator of the present invention is through research and test have obtained this creation finally for a long time.
Summary of the invention
The objective of the invention is to, a kind of pitot tube with descaling function is provided, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the technical solution used in the present invention is, a kind of pitot tube with descaling function is provided, it comprises: two draft tube and a shell, and described two draft tube one ends are sound end, the other end is the pipe tail end, it is characterized in that, described sound end is the air intake opening of described two draft tube, and it staggers vertically, and direction is relative;
Also comprise a descaler, described descaler comprises: a drive link, one scrapes a dirty topworks and a driving mechanism, described drive link is arranged between described two draft tube, one end of described drive link is provided with the described dirty topworks of scraping, describedly scrape dirty topworks and be used to scrape the crock that produces at described air intake opening, the other end of described drive link is connected with described driving mechanism, described driving mechanism is in order to produce power, it links to each other with a control device, and described control device is in order to send action command to driving mechanism;
Described shell is arranged on outside described two draft tube and the descaler;
Wherein, described two draft tube are in same plane, and are bent to form the S type at described pipe tail end, are provided with described driving mechanism in the indent of described S type;
It is wherein, described that to scrape dirty topworks be scraper or steel brush;
Wherein, its knife face of described scraper is that tail flute profile or machine work are fluted;
Wherein, described driving mechanism is motor or cylinder;
Wherein, also comprise a back-blowing device, it links to each other with described control device, receives the control command of described control device, and it links to each other described back-blowing device with described two draft tube respectively, and the crock that scrapes is blown out described two draft tube.
Wherein, described back-blowing device is a blower fan.
Beneficial effect of the present invention compared with the prior art is, on the one hand, between air intake opening, install and scrape dirty topworks, can clean automatically by driving mechanism, pass through the back-blowing device of configuration simultaneously, so that the flue dust that scrapes and coke tar particles and pipe internal contamination thing are blown down in the lump, reach the purpose of cleaning;
Owing to adopt new construction, serviceable life is elongated on the other hand, and accuracy of measurement improves, and can be used for the gas flow rate on-line measurement.
Description of drawings
The pitot tube synoptic diagram that do not have choke preventing function of Fig. 1 for using in the prior art;
Fig. 2 is for having the synoptic diagram of choke preventing function pitot tube in the prior art;
Fig. 3 has the front view of the pitot tube of descaling function for the present invention;
Fig. 4 has the vertical view of the pitot tube of descaling function for the present invention.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
See also Fig. 3, shown in Figure 4, it has the front view of the pitot tube of descaling function for the present invention, it comprises: two draft tube 23,24 and one shell 26, described two draft tube one ends are sound end 231,241, the other end is pipe tail end 232,242, described two draft tube 23,24 are in same plane, and at described pipe tail end 232,242 are bent to form the S type, described two draft tube sound ends 231, the mouth of pipe of 241 air intake opening is relative, and certain distance staggers, a descaler is set, described descaler comprises: a drive link 21, one scrapes a dirty topworks 25 and a driving mechanism 27, described drive link 21 is arranged at described two draft tube 23, between 24, one end of described drive link 21 is provided with a fastener 22 and scrapes dirty topworks 25 and be connected with described, can scrape dirty topworks 25 and be used to scrape by described at described two draft tube sound ends 231, the crock that 241 air intake opening produces, described scrape dirty topworks 25 for scraper or steel brush one of them, if with described scraper is example, then its knife face is that tail flute profile or machine work are fluted; The other end of described drive link 21 is connected with described driving mechanism 27, described driving mechanism 27 is arranged on described S type indent, described driving mechanism 27 can for motor or cylinder one of them, scrape dirty topworks 25 and drive link 21 reciprocating power in order to generation, it links to each other with a control device 3, and described control device 3 is in order to send action command to driving mechanism 27; Described control device 3 is a single-chip microcomputer, computing machine or embedded system one of them, the present invention is example with the computing machine, the cost of the measurement mechanism of this main and flowing gas pressure itself, the ability of data processing is relevant, described shell 24 is arranged on described two draft tube 23,24 and descaler outside, also comprise a back-blowing device 4, it is to be a blower fan, it links to each other with described control device 3, receive the control command of described control device 3, described back-blowing device its respectively with described two draft tube 23,24 link to each other, and the crock that scrapes is blown out described two draft tube 23,24.
During work, probe 231,241 parts of described pitot tube are put into flue, air intake opening at described two draft tube sound ends 231,241 after work a period of time begins fouling, this moment, computer system control driving mechanism 27 and back-blowing device were worked simultaneously, reach like this and regularly clean pitot tube, gas circuit is kept clear, the measurement of pressure is more near actual value, the purpose that the sectional area of air intake opening remains unchanged, keep the stable of pitot tube correction coefficient Kp simultaneously, guaranteed the accuracy of measurement result like this.By facts have proved, the alternative original S type pitot tube of this device is used for flue dust, the flue gas on-line monitoring is more practical.
The present invention improves the descaler to-and-fro movement of pitot tube and also can be ordered about by artificial promotion or machine power, and computer control times of exercise and each checkout time are looked the air intake opening degree of fouling and regularly removed; Below be a concrete example of implementing, provide corresponding basic parameter:
Described pitot tube air intake opening opposite face, two relative air intake opening plane clearance vertical range: 0.01～50mm, two air intake opening centre distance: 2～500mm, pitot tube diameter 2～100mm, pitot tube length: 10mm～10m
Cylinder can bear 1～5kg pressure, and the distance range of cylinder straight reciprocating motion is 10mm～500mm.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (6)
1, a kind of pitot tube with descaling function, it comprises: two draft tube and a shell, described two draft tube one ends are sound end, the other end is characterized in that for the pipe tail end described sound end is the air intake opening of described two draft tube, it staggers vertically, and opening direction is relative;
Also comprise a descaler, described descaler comprises: a drive link, one scrapes a dirty topworks and a driving mechanism, described drive link is arranged between described two draft tube, one end of described drive link is provided with the described dirty topworks of scraping, describedly scrape dirty topworks and be used to scrape the crock that produces at described air intake opening, the other end of described drive link is connected with described driving mechanism, described driving mechanism is in order to produce power, it links to each other with a control device, and described control device is in order to send action command to driving mechanism;
Described shell is arranged on outside described two draft tube and the descaler.
2, the pitot tube with descaling function according to claim 1 is characterized in that, described two draft tube are in same plane, and are bent to form the S type at described pipe tail end, is provided with described driving mechanism in the indent of described S type.
3, the pitot tube with descaling function according to claim 1 is characterized in that, described to scrape dirty topworks be scraper or steel brush.
4, the pitot tube with descaling function according to claim 1 is characterized in that, described driving mechanism is motor or cylinder.
5, the pitot tube with descaling function according to claim 1, it is characterized in that, also comprise a back-blowing device, it links to each other with described control device, receive the control command of described control device, it links to each other described back-blowing device with described two draft tube respectively, and the crock that scrapes is blown out described two draft tube.
6, the pitot tube with descaling function according to claim 5 is characterized in that, described back-blowing device is a blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101404479A CN100520328C (en) | 2007-08-10 | 2007-08-10 | Pitot tube with function of contaminant separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101404479A CN100520328C (en) | 2007-08-10 | 2007-08-10 | Pitot tube with function of contaminant separation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101109669A CN101109669A (en) | 2008-01-23 |
| CN100520328C true CN100520328C (en) | 2009-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101404479A Expired - Fee Related CN100520328C (en) | 2007-08-10 | 2007-08-10 | Pitot tube with function of contaminant separation |
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| Country | Link |
|---|---|
| CN (1) | CN100520328C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI561796B (en) * | 2015-04-14 | 2016-12-11 | Greatech Technology Co Ltd | Gas Flow Measurement System |
| CN108469030A (en) * | 2018-04-11 | 2018-08-31 | 山西沁新能源集团股份有限公司 | A kind of wet desulphurization flue slag cleaning device |
| CN110398611B (en) * | 2019-07-01 | 2021-04-20 | 天津大学 | Device and method for testing steady-state flow of cylinder of low-speed two-stroke marine diesel engine |
-
2007
- 2007-08-10 CN CNB2007101404479A patent/CN100520328C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101109669A (en) | 2008-01-23 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Pitot tube with function of contaminant separation Effective date of registration: 20110428 Granted publication date: 20090729 Pledgee: Wuhan science and technology Company limited by guarantee Pledgor: Wuhan Tianhong Instruments Co.,Ltd. Registration number: 2011990000150 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20111109 Granted publication date: 20090729 Pledgee: Wuhan science and technology Company limited by guarantee Pledgor: Wuhan Tianhong Instruments Co.,Ltd. Registration number: 2011990000150 |
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Denomination of invention: Pitot tube with function of contaminant separation Effective date of registration: 20120222 Granted publication date: 20090729 Pledgee: Wuhan science and technology Company limited by guarantee Pledgor: Wuhan Tianhong Instruments Co.,Ltd. Registration number: 2012990000063 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20130503 Granted publication date: 20090729 Pledgee: Wuhan science and technology Company limited by guarantee Pledgor: Wuhan Tianhong Instruments Co.,Ltd. Registration number: 2012990000063 |
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Effective date of registration: 20170608 Address after: 430223 Hubei city of Wuhan province East Lake high tech Development Zone, China Shiyuan Road No. 11 Patentee after: WUHAN TIANHONG ENVIRONMENTAL PROTECTION INDUSTRY CO.,LTD. Address before: 430223, No. 939 Xiong Chu street, Hongshan District, Hubei, Wuhan Patentee before: Wuhan Tianhong Instruments Co.,Ltd. |
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| 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: 20090729 |