CN114688317A - Valve seat structure based on pitot tube flow velocity measurement - Google Patents
Valve seat structure based on pitot tube flow velocity measurement Download PDFInfo
- Publication number
- CN114688317A CN114688317A CN202011574574.1A CN202011574574A CN114688317A CN 114688317 A CN114688317 A CN 114688317A CN 202011574574 A CN202011574574 A CN 202011574574A CN 114688317 A CN114688317 A CN 114688317A
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- China
- Prior art keywords
- valve
- pitot tube
- negative pressure
- valve seat
- positive pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
Abstract
The invention discloses a valve seat structure based on pitot tube flow velocity measurement, which comprises a valve seat, wherein a pitot tube positive pressure valve, a pitot tube negative pressure valve, a positive pressure back-blowing valve, a negative pressure back-blowing valve, a zero calibration electromagnetic valve and a micro differential pressure transmitter are arranged on the valve seat; the inside many gas passageways that are equipped with of disk seat, wherein, little differential pressure transmitter communicates through the negative pressure end of first passageway with pitot tube negative pressure valve and school zero solenoid valve, little differential pressure transmitter communicates through the positive pressure end of second passageway with pitot tube positive pressure valve and school zero solenoid valve, and pitot tube positive pressure valve communicates through the positive pressure end of third passageway with negative pressure blowback valve and pitot tube, and pitot tube negative pressure valve communicates through the negative pressure end of fourth passageway with malleation blowback valve and pitot tube. The invention has the advantages of less node structure, simple and convenient connection and improved reliability of flow velocity measurement.
Description
Technical Field
The invention relates to a fixed pollution source online monitoring technology, in particular to a valve seat structure based on pitot tube flow velocity measurement.
Background
The flow velocity is the most key parameter in measuring the flue gas parameters of medium temperature, pressure, flow and humidity, and directly influences the calculation of the total emission amount. Along with the continuous push of ultralow emission, the flue gas gradually changes to low temperature high humidity state, and this is just required for the equipment stability and the reliability of pitot tube principle measurement flow rate higher, and traditional measurement system is difficult to satisfy the flow rate measurement of supersaturation dew point flue gas.
The micro differential pressure transmitter is used for measuring flow velocity by a pitot tube principle, a stainless steel diaphragm and a silicon oil filled sensor are adopted for the micro differential pressure transmitter for high pressure resistance, and the sensor is influenced by the installation position and has certain temperature drift. The existing pitot tube measures the flow velocity, the pitot tube adopts a pipeline to connect, the pipeline connection has more nodes, the connection structure is complicated, the maintenance is not facilitated, and the reliability of flow velocity measurement can be reduced.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a valve seat structure based on pitot tube flow velocity measurement, which has the advantages of less node structures, simple and convenient connection and improved reliability of flow velocity measurement.
The technical scheme adopted by the invention for solving the technical problems is as follows: a valve seat structure based on pitot tube flow velocity measurement comprises a valve seat, wherein a pitot tube positive pressure valve, a pitot tube negative pressure valve, a positive pressure back-blowing valve, a negative pressure back-blowing valve, a zero calibration electromagnetic valve and a micro differential pressure transmitter are arranged on the valve seat;
the inside many gas passageways that are equipped with of disk seat, wherein, little differential pressure transmitter communicates through the negative pressure end of first passageway with pitot tube negative pressure valve and school zero solenoid valve, little differential pressure transmitter communicates through the positive pressure end of second passageway with pitot tube positive pressure valve and school zero solenoid valve, and pitot tube positive pressure valve communicates through the positive pressure end of third passageway with negative pressure blowback valve and pitot tube, and pitot tube negative pressure valve communicates through the negative pressure end of fourth passageway with malleation blowback valve and pitot tube.
Optionally, the valve seat is provided with two first internal thread holes, two second internal thread holes, a third internal thread hole and a fourth internal thread hole;
the first internal thread hole is connected with the positive pressure end and the negative pressure end of the micro differential pressure transmitter respectively, the two second internal thread holes are connected with the positive pressure end and the negative pressure end of the pitot tube respectively, the third internal thread hole is connected with the positive pressure end of the positive pressure blowback valve, and the fourth internal thread hole is connected with the negative pressure end of the negative pressure blowback valve.
Optionally, the valve seat is made of hard aluminum.
Optionally, the surface of the valve seat is anodized.
Optionally, the pitot tube is made of 316L stainless steel.
Optionally, the pitot tube is coated with a PTFE coating on both the inside and outside.
By adopting the technical scheme, the invention has the advantages of less node structures, simple and convenient connection and improvement of the reliability of flow velocity measurement.
Drawings
FIG. 1 is a schematic view of the construction of the valve seat of the present invention;
FIG. 2 is a schematic diagram of the gas path of the valve seat of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the invention discloses a valve seat structure based on pitot tube flow velocity measurement, which comprises a valve seat 100, wherein the valve seat 100 is provided with a pitot tube positive pressure valve 200, a pitot tube negative pressure valve 300, a positive pressure blowback valve 400, a negative pressure blowback valve 500, a zero calibration electromagnetic valve 600 and a micro differential pressure transmitter 700. The distribution positions of the pitot tube positive pressure valve 200, the pitot tube negative pressure valve 300, the positive pressure blowback valve 400, the negative pressure blowback valve 500, the zero calibration electromagnetic valve 600 and the micro differential pressure transmitter 700 on the valve seat 100 are shown in fig. 1.
In the present invention, a plurality of gas channels are provided in the valve seat 100, and the gas channels are used for circulating smoke or blowback gas. The micro differential pressure transmitter 700 is communicated with the pitot tube negative pressure valve 300 and the negative pressure end of the zero calibration electromagnetic valve 600 through the first channel 110, the micro differential pressure transmitter 700 is communicated with the pitot tube positive pressure valve 200 and the positive pressure end of the zero calibration electromagnetic valve 600 through the second channel 120, the pitot tube positive pressure valve 200 is communicated with the negative pressure blowback valve 500 and the positive pressure end of the pitot tube through the third channel 130, and the pitot tube negative pressure valve 300 is communicated with the positive pressure blowback valve 400 and the negative pressure end of the pitot tube through the fourth channel 140.
In addition, the valve seat 100 is provided with two first internal threaded holes 150, two second internal threaded holes 160, and one third and one fourth internal threaded holes 170, 180. The two first internal thread holes 150 are respectively connected with the positive pressure end and the negative pressure end of the micro differential pressure transmitter 700, the two second internal thread holes 160 are respectively connected with the positive pressure end and the negative pressure end of the pitot tube, the third internal thread hole 170 is connected with the positive pressure end of the positive pressure blowback valve 400, and the fourth internal thread hole 180 is connected with the negative pressure end of the negative pressure blowback valve 500.
As shown in fig. 2, the valve seat structure of the present invention has three different working states by combining different valves by using the valve seat structure described above:
1. speed measurement state: closing the positive pressure back-flushing valve 400, the negative pressure back-flushing valve 500 and the zero calibration electromagnetic valve 600, opening the pitot tube positive pressure valve 200 and the pitot tube negative pressure valve 300, at the moment, enabling smoke to enter the valve seat 100 from the pitot tube positive pressure valve 200, measuring the flow rate of the smoke through the micro differential pressure transmitter 700, and enabling the smoke to enter the negative pressure end of the pitot tube from the pitot tube negative pressure valve 300.
2. A back flushing state: and opening the positive pressure blowback valve 400 and the negative pressure blowback valve 500, closing the pitot tube positive pressure valve 200, the pitot tube negative pressure valve 300 and the zero calibration electromagnetic valve 600, and then blowback gas performs blowback on the positive pressure end and the negative pressure end of the pitot tube through the positive pressure blowback valve 400 and the negative pressure blowback valve 500 respectively to clean the pitot tube.
3. A zero calibration state: and opening the zero calibration electromagnetic valve 600, closing the positive pressure back-blowing valve 400, the negative pressure back-blowing valve 500, the pitot tube positive pressure valve 200 and the pitot tube negative pressure valve 300, and performing zero calibration operation on the micro differential pressure transmitter 700 by the zero calibration electromagnetic valve 600 at the moment.
In the present invention, the valve seat 100 is made of a hard aluminum material, and the surface of the valve seat 100 is anodized.
In the invention, the material of the pitot tube is 316L stainless steel, and the inner side and the outer side of the pitot tube are coated with PTFE coatings.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Other technical features than those described in the specification are known to those skilled in the art, and are not described herein in detail in order to highlight the innovative features of the present invention.
Claims (6)
1. A valve seat structure based on pitot tube flow velocity measurement is characterized by comprising a valve seat, wherein a pitot tube positive pressure valve, a pitot tube negative pressure valve, a positive pressure back-blowing valve, a negative pressure back-blowing valve, a zero calibration electromagnetic valve and a micro differential pressure transmitter are arranged on the valve seat;
the inside many gas passage that are equipped with of disk seat, wherein, differential pressure transmitter communicates through the negative pressure end of first passageway with pitot tube negative pressure valve and zero calibration solenoid valve, differential pressure transmitter communicates through the malleation end of second passageway with pitot tube positive pressure valve and zero calibration solenoid valve, and pitot tube positive pressure valve communicates through the malleation end of third passageway with negative pressure blowback valve and pitot tube, and pitot tube negative pressure valve communicates through the negative pressure end of fourth passageway with malleation blowback valve and pitot tube.
2. The pitot tube flow rate measurement-based valve seat structure of claim 1, wherein two first internally threaded holes, two second internally threaded holes, and a third internally threaded hole and a fourth internally threaded hole are provided on the valve seat;
the first internal thread hole is connected with the positive pressure end and the negative pressure end of the micro differential pressure transmitter respectively, the two second internal thread holes are connected with the positive pressure end and the negative pressure end of the pitot tube respectively, the third internal thread hole is connected with the positive pressure end of the positive pressure blowback valve, and the fourth internal thread hole is connected with the negative pressure end of the negative pressure blowback valve.
3. The pitot tube flow rate measurement-based valve seat structure of claim 2, wherein the valve seat is made of hard aluminum.
4. The pitot tube flow rate measurement-based valve seat structure of claim 3, wherein the surface of the valve seat is anodized.
5. The valve seat structure based on pitot tube flow rate measurement according to claim 4, wherein the material of the pitot tube is 316L stainless steel.
6. The pitot tube flow rate measurement based valve seat structure of claim 5, wherein the pitot tube is coated with a PTFE coating on both the inside and outside of the pitot tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574574.1A CN114688317A (en) | 2020-12-26 | 2020-12-26 | Valve seat structure based on pitot tube flow velocity measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574574.1A CN114688317A (en) | 2020-12-26 | 2020-12-26 | Valve seat structure based on pitot tube flow velocity measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114688317A true CN114688317A (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011574574.1A Pending CN114688317A (en) | 2020-12-26 | 2020-12-26 | Valve seat structure based on pitot tube flow velocity measurement |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012034183A1 (en) * | 2010-09-17 | 2012-03-22 | Goyen Controls Co Pty Ltd | Testing of flow meters |
| CN204028100U (en) * | 2014-06-16 | 2014-12-17 | 北京汇众翔科技有限公司 | A kind of Two-stage control Pitotmeter purges case |
| CN207066508U (en) * | 2017-08-17 | 2018-03-02 | 武汉正元自动化仪表工程有限公司 | A kind of Novel flue gas temperature and pressure stream monitor |
| CN208383167U (en) * | 2018-04-17 | 2019-01-15 | 北京凯隆分析仪器有限公司 | Flue gas emission temperature and pressure flow measuring apparatus |
| CN110763868A (en) * | 2019-10-31 | 2020-02-07 | 广东伟创科技开发有限公司 | Flow velocity and pressure integrated measuring instrument for online monitoring of flue gas by using pitot tube method |
-
2020
- 2020-12-26 CN CN202011574574.1A patent/CN114688317A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012034183A1 (en) * | 2010-09-17 | 2012-03-22 | Goyen Controls Co Pty Ltd | Testing of flow meters |
| CN204028100U (en) * | 2014-06-16 | 2014-12-17 | 北京汇众翔科技有限公司 | A kind of Two-stage control Pitotmeter purges case |
| CN207066508U (en) * | 2017-08-17 | 2018-03-02 | 武汉正元自动化仪表工程有限公司 | A kind of Novel flue gas temperature and pressure stream monitor |
| CN208383167U (en) * | 2018-04-17 | 2019-01-15 | 北京凯隆分析仪器有限公司 | Flue gas emission temperature and pressure flow measuring apparatus |
| CN110763868A (en) * | 2019-10-31 | 2020-02-07 | 广东伟创科技开发有限公司 | Flow velocity and pressure integrated measuring instrument for online monitoring of flue gas by using pitot tube method |
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