Positionable multi-point wind speed measuring device and measuring method

Abstract

The invention provides a positionable multi-point wind speed measuring device and method, and the device comprises a main rod which is composed of a rod body part and a measuring rod part, and the measuring rod part is provided with a central measuring hole. A first vent hole and a second vent hole are formed in the rod body part, and the first vent hole is formed in the axis of the rod body part and communicated with the center measuring hole; one second vent hole is connected with a front measuring telescopic rod; the other second vent holes are respectively connected with a rear measuring telescopic rod and an inclined measuring telescopic rod; one end of the auxiliary rod is hinged with the inclination measurement telescopic rod, and the other end is hinged with the second pin shaft; the main rod is connected with a push rod which is connected with the inclination measuring telescopic rod. According to the device, the distances from the front measuring hole, the rear measuring hole and the inclined measuring hole to the central measuring hole can be equal by pushing the push rod, so that accurate positioning of measuring points is realized. And meanwhile, the wind speed values of multiple points in the measured flue are measured, and the average wind speed on the measured section is obtained by averaging, so that the accuracy of the measurement result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind speed measurement, and particularly to a positionable multi-point wind speed measurement device and a measurement method. Background Art

[0002] At present, there are mainly two methods for calculating greenhouse gas emissions internationally, namely the nuclear method and the measurement method. The nuclear method mainly calculates the greenhouse gas emissions through the amount of combustion raw materials, while the measurement method mainly directly measures the emissions by using a flue gas online monitoring system (CEMS). The measurement method using CEMS can obtain the greenhouse gas emissions by directly measuring parameters such as flue gas flow rate, carbon dioxide concentration, and humidity, among which the flue gas flow rate is directly related to the result of carbon emission measurement. With the full implementation of the carbon trading market in China, the data actually measured by the CEMS system is expected to become an effective reference for carbon emission monitoring. Therefore, accurate measurement of the flue gas flow rate is of great significance for carbon emission monitoring, carbon emission rights trading, etc.

[0003] The test of the flue gas flow rate in the flue usually uses a pitot tube flow meter, a matrix flow meter, a thermal flow meter, an ultrasonic flow meter, etc. The pitot tube flow meter works based on Bernoulli's theorem and calculates the flow rate by measuring the pressure difference of the fluid in the pipeline. When using a pitot tube, the probe needs to be inserted into the flue, the pressure difference value is read, and then the flow rate is calculated through calculation.

[0004] The pitot tube flow meter measures the flue gas flow rate at a single point, with low accuracy, and is inconvenient to use especially in large flues or occasions with uneven flow fields. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a positionable multi-point wind speed measurement device and a measurement method, which can simultaneously measure the wind speed values at multiple points inside the flue to measure the average wind speed on the flue cross-section and improve the accuracy of the measurement result.

[0006] The present invention is implemented as follows: In the first aspect, the present invention provides a positionable multi-point wind speed measurement device, including a main rod, the main rod is composed of a rod body part and a measuring rod part connected to one end of the rod body part, and a central measuring hole is opened on the side surface of the measuring rod part; The rod body part is provided with a first ventilation hole and a plurality of second ventilation holes, and a measurement component for obtaining the flue gas flow rate is arranged in both the first ventilation hole and the second ventilation holes. The first ventilation hole is arranged at the axis of the rod body part and is communicated with the central measuring hole; The second ventilation holes surround the outside of the first ventilation hole, and one of the second ventilation holes penetrates the measuring rod part along the axial direction of the main rod and is connected to a hollow front measuring telescopic rod; the remaining second ventilation holes penetrate the rod body part along the axial direction of the main rod and are respectively connected to a hollow rear measuring telescopic rod and an inclined measuring telescopic rod; front measuring holes, rear measuring holes and inclined measuring holes are respectively arranged at the ends of the front measuring telescopic rod, the rear measuring telescopic rod and the inclined measuring telescopic rod, and the orientations of the front measuring hole, the rear measuring hole and the inclined measuring hole are the same as that of the central measuring hole; The measuring device further includes an auxiliary rod. One end of the auxiliary rod is hinged to the inclined measuring telescopic rod through a first pin shaft. A second pin shaft is arranged on the measuring rod part. The other end of the auxiliary rod is hinged to the measuring rod part through the second pin shaft, and in the vertical direction, the axis of the second pin shaft coincides with the central measuring hole; A push rod is slidably connected to the main rod, and the push rod is connected to the inclined measuring telescopic rod to change the distance between the inclined measuring hole and the central measuring hole.

[0007] Further, the measuring component is a micro pressure sensor.

[0008] Further, the inclined measuring telescopic rod includes a horizontal telescopic rod, an inclined telescopic rod and a corrugated pipe connected between the horizontal telescopic rod and the inclined telescopic rod. The horizontal telescopic rod and the inclined telescopic rod respectively expand and contract along their axial directions; One end of the horizontal telescopic rod is fixed at the second through hole. The push rod is connected to the horizontal telescopic rod. The inclined telescopic rod is hinged to the auxiliary rod. The push rod slides along the axial direction of the main rod, driving the horizontal telescopic rod to expand and contract and the inclined telescopic rod to rotate, so as to change the distance between the inclined measuring hole and the central measuring hole.

[0009] Further, the horizontal telescopic rod includes a first fixed rod fixedly connected to the rod body part. A first moving rod is slidably connected to the first fixed rod, and the first moving rod is fixedly connected to the push rod; The inclined telescopic rod includes a second fixed rod connected to the corrugated pipe. The second fixed rod is hinged to the auxiliary rod, and a second moving rod is slidably connected to the second fixed rod.

[0010] Further, a marking scale is arranged on the outer wall of the main rod.

[0011] Further, both the front measuring telescopic rod and the rear telescopic measuring rod include a third fixed rod and a third moving rod slidably connected to the inner cavity of the third fixed rod. The third fixed rod is fixed on the main rod.

[0012] In a second aspect, the present invention provides a positionable multi-point wind speed measuring method. Based on the positionable multi-point wind speed measuring device described in the first aspect, the measuring method includes the following steps: Step S1: According to the diameter D of the flue to be measured, adjust the lengths of the front measuring telescopic rod and the rear measuring telescopic rod so that the distances from the front measuring hole and the rear measuring hole to the central measuring hole are equal. Step S2: According to the diameter D of the flue to be measured, adjust the length of the tilt telescopic rod and insert the measuring device into the flue to be measured. Step S3: Push the push rod to slide, drive the horizontal telescopic rod to expand and contract and the tilt telescopic rod to rotate, and by observing the identification scale, adjust the distance between the tilt measuring hole and the central measuring hole to be equal to the distance between the front measuring hole or the rear measuring hole and the central measuring hole.

[0013] Further, in step S2, by observing the identification scale, make the central measuring hole located at the central position of the flue to be measured.

[0014] The advantages of the present invention are as follows: By pushing the push rod, the device can make the distances from the front measuring hole, the rear measuring hole and the tilt measuring hole to the central measuring hole equal, realizing the accurate positioning of the measuring points. At the same time, measure the wind speed values at multiple points in the flue to be measured and obtain the average wind speed on the measuring section by taking the average value, improving the accuracy of the measurement result. In addition, the front measuring telescopic rod, the rear measuring telescopic rod, the horizontal telescopic rod and the tilt telescopic rod are all telescopic structures, and the sliding push rod can retract the tilt measuring telescopic rod to facilitate removing the device from the flue to be measured. Description of the Drawings

[0015] The present invention will be further described below with reference to the drawings in conjunction with embodiments.

[0016] Figure 1 Structural schematic diagram of a positionable multi-point wind speed measuring device of the present invention Figure 1 .

[0017] Figure 2 Structural schematic diagram of a positionable multi-point wind speed measuring device of the present invention Figure 2 .

[0018] Figure 3 Structural schematic diagram of the wind speed measuring device adjusted according to the diameter D of the flue to be measured of the present invention.

[0019] Figure 4 is Figure 3 Simplified schematic diagram of the shown structure.

[0020] Figure 5 Structural schematic diagram of the front measuring telescopic rod or the rear measuring telescopic rod of the present invention.

[0021] Figure 6 Structural schematic diagram of the horizontal telescopic rod of the present invention.

[0022] Explanation of the reference numerals in the drawings: 1. Main rod; 11. Rod body part; 111. First ventilation hole; 112. Second ventilation hole; 12. Measuring rod part; 121. Central measuring hole; 13. Identification scale; 2. Measuring assembly; 3. Front measuring telescopic rod; 31. Front measuring hole; 4. Rear measuring telescopic rod; 41. Rear measuring hole; 5. Tilt measuring telescopic rod; 51. Horizontal telescopic rod; 511. First fixed rod; 512. First moving rod; 52. Tilt telescopic rod; 521. Second fixed rod; 522. Second moving rod; 53. Bellows; 54. Tilt measuring hole; 6. Auxiliary rod; 7. First pin shaft; 8. Second pin shaft; 9. Push rod; 20. Third fixed rod; 30. Third moving rod. Detailed implementation manner

[0023] Example 1, please refer to Figures 1 to 6 , the present invention provides a positionable multi-point wind speed measuring device, including a main rod 1, the main rod 1 is composed of a rod body part 11 and a measuring rod part 12 connected to one end of the rod body part 11, and a central measuring hole 121 is opened on the side of the measuring rod part 12; The rod body part 11 is provided with a first ventilation hole 111 and several second ventilation holes 112. Four second ventilation holes 112 are provided. The first ventilation hole 111 and the second ventilation holes 112 are both provided with a measuring assembly 2 for obtaining the smoke flow velocity. The first ventilation hole 111 is arranged at the axis of the rod body part 11 and is communicated with the central measuring hole 121; The second ventilation holes 112 are arranged around the outside of the first ventilation hole 111, and one of the second ventilation holes 112 penetrates through the measuring rod part 12 along the axial direction of the main rod 1 and is connected with a hollow front measuring telescopic rod 3; the remaining second ventilation holes 112 penetrate through the rod body part 11 along the axial direction of the main rod 1 and are respectively connected with a hollow rear measuring telescopic rod 4 and a tilt measuring telescopic rod 5; the end parts of the front measuring telescopic rod 3, the rear measuring telescopic rod 4 and the tilt measuring telescopic rod 5 are respectively provided with a front measuring hole 31, a rear measuring hole 41 and a tilt measuring hole 54, and the orientations of the front measuring hole 31, the rear measuring hole 41 and the tilt measuring hole 54 are the same as that of the central measuring hole 121.

[0024] Both the front measuring telescopic rod 3 and the rear measuring telescopic rod 4 can be telescoped along their own axial directions to adjust the distances from the front measuring hole 31 and the rear measuring hole 41 to the central measuring hole 121 according to the diameter D of the measured flue.

[0025] The measuring device further includes an auxiliary rod 6. One end of the auxiliary rod 6 is hinged to the tilt measuring telescopic rod 5 through a first pin shaft 7. The measuring rod part 12 is provided with a second pin shaft 8. The other end of the auxiliary rod 6 is hinged to the measuring rod part 12 through the second pin shaft 8, and in the vertical direction, the axis of the second pin shaft 8 coincides with the central measuring hole 121; The main rod 1 is slidably connected with a push rod 9, and the push rod 9 is connected with the tilt measurement telescopic rod 5 to change the distance between the tilt measurement hole 54 and the central measurement hole 121.

[0026] Specifically, the measurement component 2 is a micro pressure sensor.

[0027] Specifically, the tilt measurement telescopic rod 5 includes a horizontal telescopic rod 51, a tilt telescopic rod 52, and a corrugated pipe 53 connected between the horizontal telescopic rod 51 and the tilt telescopic rod 52. The horizontal telescopic rod 51 and the tilt telescopic rod 52 respectively expand and contract along their axial directions; One end of the horizontal telescopic rod 51 is fixed at the second through hole. The push rod 9 is connected with the horizontal telescopic rod 51. The tilt telescopic rod 52 is hinged with the auxiliary rod 6. The push rod 9 slides along the axial direction of the main rod 1, driving the horizontal telescopic rod 51 to expand and contract and the tilt telescopic rod 52 to rotate, so as to change the distance between the tilt measurement hole 54 and the central measurement hole 121.

[0028] The front measurement telescopic rod 3, the rear measurement telescopic rod 4, and the tilt measurement telescopic rod 5 can be telescopic, so as to adapt to any measured flue diameter D. By manually adjusting the lengths of the front measurement telescopic rod 3, the rear measurement telescopic rod 4, and the two tilt telescopic rods 52, and adjusting the angles of the two tilt telescopic rods 52 through the push rod 9, the two tilt measurement holes 54 and the central measurement hole 121 are on the same straight line and perpendicular to the axis of the main rod 1, and the distances from the front measurement hole 31, the rear measurement hole 41, and the two tilt measurement holes 54 to the central measurement hole 121 are all a fixed proportional length (such as one quarter) of the measured flue diameter D.

[0029] The following combines the attached Figure 3 and 4 to further explain the above technical solution: Figure 3 It is a schematic structural diagram of the wind speed measurement device adjusted according to the measured flue diameter D. Among them, point B is the center point of the tilt measurement hole 54, point O is the axis center of the second pin shaft 8, point A is the intersection point of the extension line passing through point B and extending along the axial direction of the tilt telescopic rod 52 and the straight line passing through point O and parallel to the axis of the main rod 1. Triangle OAB is a right triangle, and point C is the axis center of the first pin shaft 7. The length of the right side OB has been determined according to the diameter D of the measured flue. The length of OC is the length of the auxiliary rod 6, which is also a determined value. The length of the hypotenuse AB can be uniquely determined, and then the value of OA can be uniquely determined according to the hypotenuse AB, that is, the length that the push rod 9 needs to push (which can be operated according to the scale).

[0030] For example: The distances from the front measurement hole 31, the rear measurement hole 41, and the two inclined measurement holes 54 to the central measurement hole 121 are set to one - quarter of the diameter D of the flue to be measured, denoted as m (the distance from the axis of the second pin shaft 8 to the central measurement hole 121 is negligible). At this time, the distance of OB is m, the distance of OA is denoted as n, the distance of AC is denoted as b, and the length OC of the auxiliary rod 6 is denoted as a. Then: As Figure 3 and Figure 4 shown, in triangle OAC, according to the cosine theorem, we can get ; In right - angled triangle OAB, , after arranging the two formulas, we can get , where a, b, and m are all known values, and the value of n can be obtained; according to the Pythagorean theorem: The length of AB is equal to , thus obtaining the length of the inclined telescopic rod 52.

[0031] According to the above formula, it can be known that m and n are in a one - to - one correspondence relationship. Therefore, according to the diameter D of the flue to be measured, the length of the inclined telescopic rod 52 is adjusted in advance, then the distance of OA is changed by moving the push rod 9, and through the marking scale 13 for marking the distance from point O to point A, the distances from the front measurement hole 31, the rear measurement hole 41, and the two inclined measurement holes 54 to the central measurement hole 121 can be made equal.

[0032] Specifically, the horizontal telescopic rod 51 includes a first fixed rod 511 fixedly connected to the rod body part 11. The first fixed rod 511 is slidably connected with a first moving rod 512, and the first moving rod 512 is fixedly connected to the push rod 9.

[0033] The inclined telescopic rod 52 includes a second fixed rod 521 connected to the corrugated pipe 53. The second fixed rod 521 is hinged to the auxiliary rod 6, and the second fixed rod 521 is slidably connected with a second moving rod 522.

[0034] Specifically, a marking scale 13 is arranged on the outer wall of the main rod 1. The marking scale 13 is used to mark the distance from point O to point A.

[0035] Specifically, both the front measurement telescopic rod 3 and the rear measurement telescopic rod include a third fixed rod 20 and a third moving rod 30 slidably connected to the inner cavity of the third fixed rod 20. The third fixed rod 20 is fixed on the main rod 1. Among them, the third fixed rod 20 in the front measurement telescopic rod 3 is fixedly connected to the measuring rod part 12, and the third fixed rod 20 in the rear measurement telescopic rod 4 is fixedly connected to the rod body part 11.

[0036] Embodiment 2: The present invention provides a multi - point wind speed measurement method with positioning. Based on the multi - point wind speed measurement device described in Embodiment 1, the measurement method includes the following steps: Step S1. According to the diameter D of the flue to be measured, adjust the lengths of the front measuring telescopic rod 3 and the rear measuring telescopic rod 4 so that the distances from the front measuring hole 31 and the rear measuring hole 41 to the central measuring hole 121 are equal. In this embodiment, the distances from the front measuring hole 31 and the rear measuring hole 41 to the central measuring hole 121 are both one-fourth of the diameter D of the flue to be measured; Step S2. According to the diameter D of the flue to be measured, adjust the length of the inclined telescopic rod 52, that is, adjust the length of AB to be , and insert the measuring device into the flue to be measured; Step S3. Push the push rod 9 to slide, drive the horizontal telescopic rod 51 to expand and contract and the inclined telescopic rod 52 to rotate, and by observing the marking scale 13, adjust the distance between the inclined measuring hole 54 and the central measuring hole 121 to be equal to the distance between the front measuring hole 31 or the rear measuring hole 41 and the central measuring hole 121. When the marking scale 13 shows that OA is n, the distance between the inclined measuring hole 54 and the central measuring hole 121 is also one-fourth of the diameter D of the flue to be measured, that is, the value of m is equal to D / 4.

[0037] Specifically, in step S2, by observing the marking scale 13, make the central measuring hole 121 located at the central position of the flue to be measured. On the premise of knowing the diameter D of the flue to be measured, if the central measuring hole 121 deviates from the center of the flue to be measured, the inner wall of the flue to be measured will not fall on the preset marking scale 13. By making the central measuring hole 121 located at the central position of the flue to be measured, the measurement accuracy can be improved.

[0038] The advantages of the present invention are as follows: By pushing the push rod 9, the device can make the distances from the front measuring hole 31, the rear measuring hole 41 and the inclined measuring hole 54 to the central measuring hole 121 equal, realizing the accurate positioning of the measuring points. At the same time, the wind speed values at multiple points in the flue to be measured are measured and the average wind speed on the measuring section is obtained by taking the average value, improving the accuracy of the measurement result. In addition, the front measuring telescopic rod 3, the rear measuring telescopic rod 4, the horizontal telescopic rod 51 and the inclined telescopic rod 52 are all telescopic structures, and the sliding push rod 9 can retract the inclined measuring telescopic rod 5 to facilitate removing the device from the flue to be measured.

[0039] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be covered by the scope of the claims of the present invention.

Claims

1. A locatable multi-point wind speed measuring device, characterized in that: include: Main rod, auxiliary rod and push rod; The main rod comprises: a rod body and a measuring rod, and a central measuring hole is provided on the side of the measuring rod; The rod body is provided with a first vent hole and a plurality of second vent holes, and the first vent hole and the second vent hole are both provided with a measuring component for obtaining the flue gas flow rate, and the first vent hole is arranged at the axis of the rod body and is connected to the central measuring hole; The second air vents surround the outside of the first air vents, and one of the second air vents passes through the measuring rod portion along the axial direction of the main rod, and the measuring rod portion is connected to a hollow front measuring telescopic rod; the remaining second air vents pass through the rod body portion along the axial direction of the main rod, and are respectively connected to a hollow rear measuring telescopic rod and an inclination measuring telescopic rod; the ends of the front measuring telescopic rod, the rear measuring telescopic rod and the inclination measuring telescopic rod are respectively provided with a front measuring hole, a rear measuring hole and an inclination measuring hole, and the directions of the front measuring hole, the rear measuring hole and the inclination measuring hole are consistent with the central measuring hole; One end of the auxiliary rod is hinged to the tilt measuring telescopic rod through a first pin, the measuring rod portion is provided with a second pin, the other end of the auxiliary rod is hinged to the measuring rod portion through the second pin, and in the vertical direction, the axis of the second pin coincides with the central measuring hole; The main rod is slidably connected to the push rod, and the push rod is connected to the inclination measurement telescopic rod to change the distance from the inclination measurement hole to the central measurement hole.

2. A locatable multi-point wind speed measuring device as claimed in claim 1, characterized in that: The measuring component is a micro-pressure sensor.

3. The multi-point wind speed measuring device capable of being positioned as claimed in claim 1, characterized in that: The tilt measuring telescopic rod comprises a horizontal telescopic rod, a tilted telescopic rod and a bellows connected between the horizontal telescopic rod and the tilted telescopic rod, wherein the horizontal telescopic rod and the tilted telescopic rod are respectively telescopic along their axial directions; One end of the horizontal telescopic rod is fixed at the second through hole, the push rod is connected to the horizontal telescopic rod, the inclined telescopic rod is hinged to the auxiliary rod, and the push rod slides axially along the main rod to drive the horizontal telescopic rod to extend and retract and the inclined telescopic rod to rotate, so as to change the distance from the inclined measuring hole to the central measuring hole.

4. A locatable multi-point wind speed measuring device as claimed in claim 3, characterized in that: The horizontal telescopic rod comprises a first fixed rod fixedly connected to the rod body, the first fixed rod is slidably connected to a first moving rod, and the first moving rod is fixedly connected to the push rod; The tilt telescopic rod comprises a second fixing rod connected to the bellows, the second fixing rod is hinged to the auxiliary rod, and the second fixing rod is slidably connected to the second moving rod.

5. The multi-point wind speed measuring device capable of being positioned as claimed in claim 1, characterized in that: The outer wall of the main rod is provided with marking scales.

6. The multi-point wind speed measuring device capable of being positioned as claimed in claim 1, characterized in that: The front telescopic measuring rod and the rear telescopic measuring rod both include a third fixed rod and a third movable rod slidably connected to the inner cavity of the third fixed rod, and the third fixed rod is fixed on the main rod.

7. A method for measuring wind speed at multiple locations, characterized in that: Based on a locatable multi-point wind speed measuring device according to any one of claims 1 to 6, the measuring method comprises the following steps: Step S1, according to the diameter D of the flue to be measured, adjusting the length of the front measuring telescopic rod and the rear measuring telescopic rod so that the distances from the front measuring hole and the rear measuring hole to the central measuring hole are equal; Step S2, adjusting the length of the inclined telescopic rod according to the diameter D of the flue to be measured, and extending the measuring device into the flue to be measured; Step S3, push the push rod to slide, drive the horizontal telescopic rod to extend and retract, and the inclined telescopic rod to rotate, and by observing the marking scale, adjust the distance from the inclined measuring hole to the central measuring hole to be equal to the distance from the front measuring hole or the rear measuring hole to the central measuring hole.

8. A method for measuring wind speed at multiple locations according to claim 7, characterized in that: In step S2, the central measuring hole is located at the center of the flue to be measured by observing the marking scale.

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