CN209911397U - Portable device for measuring wind speed in primary air pipe of coal-fired power plant - Google Patents
Portable device for measuring wind speed in primary air pipe of coal-fired power plant Download PDFInfo
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- CN209911397U CN209911397U CN201920813067.5U CN201920813067U CN209911397U CN 209911397 U CN209911397 U CN 209911397U CN 201920813067 U CN201920813067 U CN 201920813067U CN 209911397 U CN209911397 U CN 209911397U
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Abstract
The embodiment of the utility model discloses wind speed measuring device in portable coal fired power plant's air hose for realize the rapid survey of wind speed in the air hose. The embodiment of the utility model provides an include: the pipe that tests the speed, tube socket guide rail, sliding base, sealing member, connecting pipe, micromanometer and computer of two flute shapes, tube socket guide rail welded fastening tests the speed the tub afterbody at two flute shapes, sliding base and tube socket guide rail pass through the screw thread and are connected, the sealing member is fixed on sliding base, connect through the connecting pipe between micromanometer and the two flute shapes pipe that tests the speed, micromanometer and computer pass through the data line and connect. The utility model discloses a two flute venturi tubes velocimetry can realize the quick measurement of wind speed in the tuber pipe, has simplified the measurement procedure, has improved measurement of efficiency, has greatly practiced thrift measuring time to measured leakproofness has been guaranteed.
Description
Technical Field
The utility model relates to a differential pressure formula speed measurement field especially relates to a wind speed measurement device in portable coal fired power plant's primary air pipe.
Background
With the continuous improvement of national requirements on energy conservation and emission reduction of coal-fired units, whether the boiler is in the optimal operation state is increasingly concerned. For coal-fired power plants, raw coal is fed into a coal mill by a coal feeder to be heated and ground, and coal powder meeting requirements is carried into a hearth by primary air. Because the lengths and the structures of the primary air pipes are different, the resistances of the primary air pipes are different, and therefore the coal feeding amount of each combustor is possibly uneven. In order to ensure that the boiler is in the optimal operation state, primary air leveling tests are required in a cold dynamic field test and a combustion adjustment test of the boiler. One-time wind speed measurement is crucial to ensure the safety and economy of the running state of the boiler. Improper primary air speed adjustment can cause deviation of flame center, unstable combustion, reduced combustion efficiency, increased pollutant discharge, deviation of smoke temperature and steam temperature on two sides and the like, and even accidents such as burner burnout, primary air pipe blockage, water wall tube explosion, boiler coking and the like are caused.
The primary air pipe belongs to a pipeline with medium and small diameter, high flow rate, medium and low temperature and gas-solid two-phase flow. At present, a differential pressure speed measurement method is mainly adopted for primary wind speed measurement of a coal-fired power plant and comprises a pitot tube, a backrest tube and the like, and the method has the advantages of high economy, strong stability, long service life and the like. Generally, a primary wind speed measurement is to extend a pitot tube or a backrest tube into a primary wind pipe, measure the pitot tube or the backrest tube one by one according to a cross-section grid method, and then calculate an average value. Typically 8-10 points per duct are measured, each for 30-60 seconds, and therefore, this single point velocity measurement is extremely time consuming. For a primary air leveling test, each coal mill is provided with 4-6 primary air pipes, and after each leveling, all primary air speeds are measured again and repeatedly, and then the final leveling can be carried out. One wind leveling test for each coal mill requires a long time to complete, which greatly wastes the time and energy of the tester. The double flute-shaped pipe type backrest pipe is an effective method for realizing multipoint wind speed average value measurement, but the conventional double flute-shaped pipe type backrest pipe is of a fixed and unadjustable structure, and cannot realize portable measurement of wind speed by changing primary wind pipe diameter and measuring hole diameter.
Therefore, how to provide a portable device for measuring the air speed in the primary air pipe of the coal-fired power plant is a problem which needs to be solved urgently by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model discloses wind speed measuring device in portable coal fired power plant's air hose for realize the rapid survey of wind speed in the air hose.
The utility model discloses the first aspect provides a wind speed measuring device in portable coal fired power plant's primary air pipe, include:
the device comprises a double flute-shaped speed measuring tube, a tube seat guide rail, a sliding base, a sealing piece, a connecting tube, a micro-manometer and a computer;
the tube seat guide rail is welded and fixed at the tail part of the double flute-shaped speed measuring tube;
the sliding base is connected with the tube seat guide rail through threads;
the sealing element is fixed on the sliding base;
the micro-manometer is connected with the double-flute-shaped speed measuring tube through a connecting tube;
the micro-pressure meter is connected with the computer through a data line.
Optionally, the tube seat guide rail and the sliding base are matched through threads, external threads are arranged on the surface of the tube seat guide rail, corresponding internal threads are arranged inside the sliding base, and free movement and sealing effects of the sliding base on the tube seat guide rail are achieved.
Optionally, the sliding base and the sealing element are designed to be of boss structures so as to be matched with primary air pipe measuring holes with different inner diameters and realize sealing.
Optionally, the sealing element is made of hard silica gel, and interference fit between the measuring device and the primary air pipe surface measuring hole is achieved.
Optionally, the communication interface between the micro-pressure meter and the computer is a USB or ethernet interface.
Optionally, the double flute-shaped speed measuring tubes comprise a total pressure measuring tube, a static pressure measuring tube, a total pressure measuring hole, a static pressure measuring hole, a vernier fixing seat, a fastening screw and a sliding vernier;
the total pressure measuring pipe and the static pressure measuring pipe are welded and fixed side by side;
the tail part of the total pressure measuring pipe is a bent pipe, and a plurality of total pressure measuring holes are uniformly distributed on the surface of the total pressure measuring pipe opposite to the incoming flow along the length direction;
the opening direction of the total pressure measuring hole is opposite to the incoming flow direction and forms an included angle of 0 degree with the incoming flow;
the tail part of the static pressure measuring pipe is a straight pipe, and static pressure measuring holes twice the total pressure measuring holes are uniformly distributed on two sides of the surface of the static pressure measuring pipe along the length direction;
the opening direction of the static pressure measuring hole is opposite to the incoming flow direction, and an included angle of 70-90 degrees is formed between the opening direction of the static pressure measuring hole and the incoming flow;
the vernier fixing seat is welded and fixed on the total pressure measuring pipe and the static pressure measuring pipe;
the vernier fixing seat is connected with the fastening screw through threads;
the vernier is movably arranged at the head of the double flute-shaped speed measuring tube, and the sliding vernier is positioned between the total pressure measuring tube, the static pressure measuring tube and the two vernier fixing seats and is fixed through fastening screws.
Optionally, 9 total pressure measurement holes are arranged on the total pressure measurement pipe, and a spherical groove is designed around each total pressure measurement hole.
Optionally, the sliding cursor surface is graduated.
Optionally, the length of the double flute-shaped speed measuring pipe extending into the primary air pipe is adjusted by the distance of the sliding vernier extending out of the head of the total/static pressure measuring pipe.
The utility model discloses a portable wind speed measurement device once developed. The utility model adopts the arrangement of the double flute-shaped pipes and the arrangement of the optimized total static pressure measuring holes to realize the quick and accurate measurement of the primary wind speed, thereby improving the measurement efficiency and precision and enhancing the measurement stability; the measuring device is suitable for primary air pipes with different inner diameters by adopting the design of sliding cursors and the like, and is suitable for primary air pipe measuring holes with different inner diameters by adopting the design of pipe seat guide rails, sliding bases, sealing elements and the like, so that the application range, the portability and the sealing property of the measuring device are improved; by introducing the micro-pressure meter and the computer, the on-line measurement of the wind speed is realized, and the measurement accuracy is improved.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of a portable coal-fired power plant primary air duct wind speed measuring device of the present invention;
FIG. 2 is a schematic view of the dual flute-shaped velocity measurement tube structure of the present invention;
FIG. 3 is a cross-sectional view of the dual flute-shaped tachometer tube of the present invention;
FIG. 4 is a schematic diagram of a method for measuring the wind velocity in the primary air duct of a portable coal-fired power plant according to the present invention;
FIG. 5 is a schematic structural view of an embodiment 2 of the portable coal-fired power plant primary air duct internal air velocity measurement device of the present invention.
Detailed Description
The embodiment of the utility model discloses wind speed measuring device in portable coal fired power plant's air hose for realize the rapid survey of wind speed in the air hose.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For easy understanding, the following description will be made of specific embodiments of the present invention, please refer to fig. 1 to 3, and the schematic diagrams of the portable coal-fired power plant primary air duct wind speed measuring device and the dual flute-shaped speed measuring tube in the embodiments of the present invention include:
a portable coal-fired power plant primary air pipe inner air speed measuring device is characterized by comprising a double flute-shaped speed measuring pipe 1, a pipe seat guide rail 2, a sliding base 3, a sealing element 4, a connecting pipe 5, a micro-pressure meter 6 and a computer 7. The tube seat guide rail 2 is fixedly welded at the tail part of the double flute-shaped speed measuring tube 1; the sliding base 3 is connected with the tube seat guide rail 2 through threads; the sealing element 4 is fixed on the sliding base 3; the micro-manometer 6 is connected with the double-flute-shaped speed measuring tube 1 through a connecting tube 5; the micro-manometer 6 and the computer 7 are connected through a data line.
As an optional embodiment, the double flute-shaped speed measuring tube 1, the tube seat guide rail 2 and the sliding base 3 are all made of stainless steel;
as an optional embodiment, the tube seat guide rail 2 is matched with the sliding base 3 through threads, external threads are arranged on the surface of the tube seat guide rail, corresponding internal threads are arranged in the sliding base, and the free movement and the sealing action of the sliding base on the tube seat guide rail are realized;
as an alternative embodiment, the sliding base 3 and the sealing element 4 are designed into boss structures to match with primary air pipe measuring holes 8 with different inner diameters and realize sealing;
as an optional embodiment, the sealing element 4 is made of hard silica gel, so that the interference fit between the measuring device and the measuring hole on the surface of the primary air pipe 9 is realized, and the cold/hot air powder is prevented from leaking;
as an alternative embodiment, the sealing element 4 is in interference fit with the sliding base 3 to prevent cold/hot wind powder from leaking;
as an optional embodiment, the connecting tube 5 is a silicone tube;
as an alternative embodiment, the micro-pressure meter 6 is a commercial electronic micro-pressure meter with a battery, so as to simplify the complexity of system equipment;
as an alternative embodiment, the communication interface between the micro-pressure meter 6 and the computer 7 adopts a USB or Ethernet interface.
The double flute-shaped speed measuring tube 1 comprises a total pressure measuring tube 11, a static pressure measuring tube 12, a total pressure measuring hole 13, a static pressure measuring hole 14, a vernier fixing seat 15, a fastening screw 16 and a sliding vernier 17. The total pressure measuring pipe 11 and the static pressure measuring pipe 12 are welded and fixed side by side; the tail part of the total pressure measuring pipe 11 is a bent pipe, and a plurality of total pressure measuring holes 13 are uniformly distributed on the surface of the total pressure measuring pipe opposite to the incoming flow along the length direction; the opening direction of the total pressure measuring hole 13 is opposite to the incoming flow direction and forms an included angle of 0 degree with the incoming flow; the tail part of the static pressure measuring pipe 12 is a straight pipe, and static pressure measuring holes 14 with the number being twice of the total pressure measuring holes are uniformly distributed on two sides of the surface of the static pressure measuring pipe along the length direction; the opening direction of the static pressure measuring hole 14 is opposite to the incoming flow direction, and an included angle of 70-90 degrees is formed between the opening direction and the incoming flow; the vernier fixing seat 15 is fixedly welded on the total pressure measuring pipe 11 and the static pressure measuring pipe 12; the vernier fixing seat 15 is connected with the fastening screw 16 through threads; the vernier and the sliding vernier 17 are movably arranged at the head of the double flute-shaped speed measuring tube 1, and the sliding vernier is positioned between the total pressure measuring tube 11, the static pressure measuring tube 12 and the two vernier fixing seats 15 and is fixed through a fastening screw 16.
As an alternative embodiment, the pipe diameters of the total pressure measuring pipe 11 and the static pressure measuring pipe 12 are selected to be 10-20mm, and the wall thickness is about 1 mm;
as an optional embodiment, the tail parts of the total pressure measuring pipe 11 and the static pressure measuring pipe 12 are designed to be necking, so that the connection of the connecting pipe 5 with the total pressure measuring pipe 11 and the static pressure measuring pipe 12 is facilitated;
as an optional embodiment, 9 total pressure measurement holes are arranged on the total pressure measurement pipe 11, and a spherical groove is designed around each total pressure measurement hole to weaken the sensitivity of the total pressure measurement pipe to a measurement angle;
as an optional embodiment, two sides of the static pressure measuring pipe 12 are respectively provided with 9 static pressure measuring holes, and 18 static pressure measuring holes are arranged in total, so that the sensitivity of the static pressure measuring pipe to a measuring angle is weakened;
as an alternative embodiment, the pore diameters of the total pressure measuring hole and the static pressure measuring hole 14 are selected to be 1-5 mm;
as an optional embodiment, the surface of the sliding vernier 17 is provided with scales so as to conveniently adjust the length of the double flute-shaped speed measuring pipe 1 extending into the air pipe;
the length of the double flute-shaped speed measuring pipe 1 extending into the primary air pipe 9 is adjusted by the distance of the sliding vernier 17 extending out of the head of the total/static pressure measuring pipe. In order to ensure that the central measuring hole of the double flute-shaped speed measuring tube 1 is positioned at the central position of the primary air duct 9, the distance m of the sliding vernier 17 extending out of the head part of the total/static pressure measuring tube is determined by a formula:
m＝d/2-l
in the formula, d is the inner diameter of the primary air pipe; l is the distance from the head of the total/static pressure measuring tube to the central measuring hole.
Generally, the inner diameter of the primary air duct is 450-550mm, and the measurement device meets the measurement of the wind speed in the primary air ducts with different inner diameters within a certain range by reasonably setting the lengths of the total pressure measuring tube 11, the static pressure measuring tube 12 and the sliding cursor 17.
The utility model also provides a be applied to wind speed measurement method of foretell portable coal fired power plant primary air pipe in wind speed measurement device, as shown in FIG. 4, wind speed measurement method schematic diagram in portable coal fired power plant primary air pipe includes:
determining the distance m of the sliding vernier 17 extending out of the head of the total/static pressure measuring pipe according to the inner diameter of the primary air pipe, extending the sliding vernier 17 out of the head of the total/static pressure measuring pipe by the distance m, and fixing the sliding vernier 17 by a fastening screw 16;
moving the sliding base 3 to the tail part of the tube seat guide rail 2;
and (3) extending the double flute-shaped speed measuring pipe 1 into the primary air pipe 9 from the primary air pipe measuring hole 8 until the top end of the double flute-shaped speed measuring pipe 1 contacts the wall of the primary air pipe, and ensuring that the total pressure measuring hole 13 is just opposite to the incoming flow direction.
Moving the sliding base 3 along the tube seat guide rail 2 until the sealing element 4 contacts the primary air pipe measuring hole 8 and achieves interference fit;
one end of each of the two connecting pipes 5 is connected with the tail parts of the total pressure measuring pipe 11 and the static pressure measuring pipe 12 respectively, the connecting pipe 5 corresponding to the total pressure measuring pipe 11 is connected with the positive pressure interface of the micro-manometer 6, and the connecting pipe 5 corresponding to the static pressure measuring pipe 12 is connected with the negative pressure interface of the micro-manometer 6;
the micro-pressure meter 6 converts the measured differential pressure signal into a digital signal and transmits the digital signal to the computer (7);
the computer 6 processes the acquired digital signals and outputs a wind speed result, and the wind speed v is obtained by using a formula:
in the above formula, k is a calibration coefficient; Δ P is the measured dynamic pressure; rho is primary air density;
the wind speed value of a period of time is recorded by the computer 7, and the average wind speed corresponding to the period of time can be obtained.
Referring to fig. 5, most of the structure of the measuring device of another embodiment is the same as that of embodiment 1, and the description is omitted here, except that the measuring device further includes a back purge structure to prevent the blockage phenomenon of the primary wind speed in the thermal state measurement. The back flushing structure comprises a total pressure back flushing pipe 18, a static pressure back flushing pipe 19, a valve A110, a valve B120, a valve C130 and a valve D140. One end of the total pressure blowback pipe 18 is welded and fixed with and communicated with the total pressure measuring pipe 11, and the other end is communicated with compressed air; one end of the static pressure blowback pipe 19 is welded and fixed with the static pressure measuring pipe 12 and communicated with the static pressure measuring pipe, and the other end of the static pressure blowback pipe is communicated with compressed air; the valve A110 is arranged on the total pressure measuring pipe 11; the valve B120 is arranged on the static pressure measuring pipe 12; the valve C130 is arranged on the total pressure blowback pipe 18; the valve D140 is mounted on the static pressure blowback pipe 19.
As an optional embodiment, the total pressure blowback pipe 18 and the static pressure blowback pipe 19 are made of stainless steel;
as an alternative embodiment, the valve a110, the valve B120, the valve C130 and the valve D140 are ball valves;
as an alternative embodiment, the compressed air is self-contained compressed air of a power plant.
The back flushing method of the above embodiment includes the following steps:
suspending the measuring device;
close valve a110 and valve B120 and ensure that valve C130 and valve D140 are closed;
connecting a total pressure blowback pipe 18 and a static pressure blowback pipe 19 to the compressed air;
opening a valve C130 and a valve D140, and performing back flushing on the double flute-shaped speed measuring pipe 1 for a period of time;
closing the valve C130 and the valve D140, and opening the valve a110 and the valve B120;
and opening the measuring device, and carrying out data measurement and other operations.
The utility model discloses a portable wind speed measurement device once developed. The utility model adopts the arrangement of the double flute-shaped pipes and the arrangement of the optimized total/static pressure measuring holes to realize the quick and accurate measurement of the primary wind speed, thereby improving the measurement efficiency and precision and enhancing the measurement stability; the measuring device is suitable for primary air pipes with different inner diameters by adopting the design of sliding cursors and the like, and is suitable for primary air pipe measuring holes with different inner diameters by adopting the design of pipe seat guide rails, sliding bases, sealing elements and the like, so that the application range, the portability and the sealing property of the measuring device are improved; by introducing the micro-pressure meter and the computer, the on-line measurement of the wind speed is realized, and the measurement accuracy is improved.
The above embodiments are merely preferred embodiments of the present application, and the present invention is not limited to the above embodiments. Various modifications, additions and substitutions within the spirit and scope of the application may be made by those skilled in the art without departing from the spirit and scope of the application.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above steps do not mean the execution sequence, and the execution sequence of the steps should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed system and apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a separate product, may be recorded in a computer-readable recording medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is recorded in a recording medium, and includes instructions for causing a computer (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned recording medium includes: a U-disk, a portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of recording program codes.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. The utility model provides a wind speed measuring device in portable coal fired power plant's primary air pipe which characterized in that includes:
the device comprises a double flute-shaped speed measuring tube, a tube seat guide rail, a sliding base, a sealing piece, a connecting tube, a micro-manometer and a computer;
the tube seat guide rail is welded and fixed at the tail part of the double flute-shaped speed measuring tube;
the sliding base is connected with the tube seat guide rail through threads;
the sealing element is fixed on the sliding base;
the micro-manometer is connected with the double-flute-shaped speed measuring tube through a connecting tube;
the micro-pressure meter is connected with the computer through a data line.
2. The apparatus of claim 1, wherein the socket guide rail and the slide base are threadedly engaged, the socket guide rail having external threads disposed on a surface thereof and the slide base having corresponding internal threads disposed therein, thereby allowing the slide base to freely move and seal against the socket guide rail.
3. The device of claim 1, wherein the sliding base and the sealing element are designed into boss structures so as to match primary air pipe measuring holes with different inner diameters and realize sealing.
4. The device of claim 1, wherein the sealing element is made of hard silica gel, so that the measuring device is in interference fit with the measuring hole in the surface of the primary air pipe.
5. The device of claim 1, wherein the communication interface between the micro-pressure gauge and the computer is a USB or ethernet interface.
6. The device of claim 1, wherein the double flute-shaped speed measuring tubes comprise a total pressure measuring tube, a static pressure measuring tube, a total pressure measuring hole, a static pressure measuring hole, a vernier fixing seat, a fastening screw and a sliding vernier;
the total pressure measuring pipe and the static pressure measuring pipe are welded and fixed side by side;
the tail part of the total pressure measuring pipe is a bent pipe, and a plurality of total pressure measuring holes are uniformly distributed on the surface of the total pressure measuring pipe opposite to the incoming flow along the length direction;
the opening direction of the total pressure measuring hole is opposite to the incoming flow direction and forms an included angle of 0 degree with the incoming flow;
the tail part of the static pressure measuring pipe is a straight pipe, and static pressure measuring holes twice the total pressure measuring holes are uniformly distributed on two sides of the surface of the static pressure measuring pipe along the length direction;
the opening direction of the static pressure measuring hole is opposite to the incoming flow direction, and an included angle of 70-90 degrees is formed between the opening direction of the static pressure measuring hole and the incoming flow;
the vernier fixing seat is welded and fixed on the total pressure measuring pipe and the static pressure measuring pipe;
the vernier fixing seat is connected with the fastening screw through threads;
the vernier is movably arranged at the head of the double flute-shaped speed measuring tube, and the sliding vernier is positioned between the total pressure measuring tube, the static pressure measuring tube and the two vernier fixing seats and is fixed through fastening screws.
7. The device of claim 6, wherein the total pressure measuring pipe is provided with 9 total pressure measuring holes, and each total pressure measuring hole is designed into a spherical groove around the circumference.
8. The device of claim 6, wherein the sliding cursor surface is graduated.
9. The apparatus of claim 7, wherein the length of the double flute velocity tubes extending into the primary air duct is adjusted by the distance the sliding cursor extends out of the head of the sum/static pressure tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920813067.5U CN209911397U (en) | 2019-05-31 | 2019-05-31 | Portable device for measuring wind speed in primary air pipe of coal-fired power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920813067.5U CN209911397U (en) | 2019-05-31 | 2019-05-31 | Portable device for measuring wind speed in primary air pipe of coal-fired power plant |
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| Publication Number | Publication Date |
|---|---|
| CN209911397U true CN209911397U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920813067.5U Withdrawn - After Issue CN209911397U (en) | 2019-05-31 | 2019-05-31 | Portable device for measuring wind speed in primary air pipe of coal-fired power plant |
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| CN (1) | CN209911397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082560A (en) * | 2019-05-31 | 2019-08-02 | 润电能源科学技术有限公司 | Wind speed measuring device and method in a kind of portable coal-burning power plant's primary air piping |
-
2019
- 2019-05-31 CN CN201920813067.5U patent/CN209911397U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082560A (en) * | 2019-05-31 | 2019-08-02 | 润电能源科学技术有限公司 | Wind speed measuring device and method in a kind of portable coal-burning power plant's primary air piping |
| CN110082560B (en) * | 2019-05-31 | 2024-09-10 | 润电能源科学技术有限公司 | Portable device and method for measuring wind speed in primary air pipe of coal-fired power plant |
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