A Positionable Multi-Point Wind Speed Measuring Device and Measuring Method

Abstract

The present invention provides a positionable multi-point wind speed measuring device and a measuring method. The device includes a main rod composed of a rod body part and a measuring rod part. The measuring rod part is provided with a central measuring hole; the rod body part is provided with a first ventilation hole and 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; one of the second ventilation holes is connected with a front measuring telescopic rod; the remaining second ventilation holes are respectively connected with a rear measuring telescopic rod and an inclined measuring telescopic rod; one end of an auxiliary rod is hinged to the inclined measuring telescopic rod, and the other end of the auxiliary rod is hinged to a second pin shaft; the main rod is connected with a push rod, and the push rod is connected with the inclined measuring telescopic rod. By pushing the push rod, the device can make the distances from the front measuring hole, the rear measuring hole and the inclined measuring hole to the central measuring hole all 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.

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 them, 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 adopts 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:

[0007] In a 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 provided on the side surface of the measuring rod part;

[0008] 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;

[0009] The second ventilation holes surround the outside of the first ventilation hole, and one of the second ventilation holes penetrates through the measuring rod part along the axial direction of the main rod and is connected with a hollow front measuring telescopic rod; the remaining second ventilation holes penetrate through the rod body part along the axial direction of the main rod and are respectively connected with a hollow rear measuring telescopic rod and an inclined measuring telescopic rod; the end parts of the front measuring telescopic rod, the rear measuring telescopic rod and the inclined measuring telescopic rod are respectively provided with a front measuring hole, a rear measuring hole and an inclined measuring hole, 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;

[0010] 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. The measuring rod part is provided with a second pin shaft. 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;

[0011] A push rod is slidably connected to the main rod. The push rod is connected with the inclined measuring telescopic rod to change the distance between the inclined measuring hole and the central measuring hole.

[0012] Further, the measuring component is a micro pressure sensor.

[0013] 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;

[0014] One end of the horizontal telescopic rod is fixed at the second ventilation hole. The push rod is connected with 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.

[0015] Further, the horizontal telescopic rod includes a first fixed rod fixedly connected with the rod body part. The first fixed rod is slidably connected with a first moving rod. The first moving rod is fixedly connected with the push rod;

[0016] The inclined telescopic rod includes a second fixed rod connected with the corrugated pipe. The second fixed rod is hinged to the auxiliary rod. The second fixed rod is slidably connected with a second moving rod.

[0017] Further, a marking scale is arranged on the outer wall of the main rod.

[0018] 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.

[0019] Second aspect, the present invention provides a locatable multi-point wind speed measurement method, based on a locatable multi-point wind speed measurement device described in the first aspect. The measurement method includes the following steps:

[0020] Step S1: According to the diameter D of the flue to be measured, adjust the lengths of the front measurement telescopic rod and the rear measurement telescopic rod so that the distances from the front measurement hole and the rear measurement hole to the central measurement hole are equal.

[0021] Step S2: According to the diameter D of the flue to be measured, adjust the length of the inclined telescopic rod and insert the measurement device into the flue to be measured.

[0022] Step S3: Push the push rod to slide, drive the horizontal telescopic rod to expand and contract and the inclined telescopic rod to rotate, and by observing the marking scale, adjust the distance between the inclined measurement hole and the central measurement hole to be equal to the distance between the front measurement hole or the rear measurement hole and the central measurement hole.

[0023] Further, in step S2, by observing the marking scale, make the central measurement hole located at the central position of the flue to be measured.

[0024] The advantages of the present invention are as follows: By pushing the push rod, the device can make the distances from the front measurement hole, the rear measurement hole and the inclined measurement hole to the central measurement hole equal, realizing the accurate positioning of the measurement 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 measurement section by taking the average value, improving the accuracy of the measurement result. In addition, the front measurement telescopic rod, the rear measurement telescopic rod, the horizontal telescopic rod and the inclined telescopic rod are all telescopic structures, and the sliding push rod can retract the inclined measurement telescopic rod to facilitate removing the device from the flue to be measured. Description of the Drawings

[0025] The present invention will be further described below with reference to the drawings in conjunction with embodiments.

[0026] Figure 1 Structural schematic of a locatable multi-point wind speed measurement device of the present invention Figure 1 .

[0027] Figure 2 Structural schematic of a locatable multi-point wind speed measurement device of the present invention Figure 2 .

[0028] Figure 3 Structural schematic diagram of the wind speed measurement device adjusted according to the diameter D of the flue to be measured of the present invention.

[0029] Figure 4 is Figure 3 Simplified schematic diagram of the structure shown.

[0030] Figure 5 Structural schematic of the front measurement telescopic rod or the rear measurement telescopic rod of the present invention.

[0031] Figure 6 This is a schematic structural diagram of the horizontal telescopic rod of the present invention.

[0032] Description of the reference numerals in the figure:

[0033] 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 component; 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. Specific embodiments

[0034] In the first embodiment, 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;

[0035] The rod body part 11 is provided with a first ventilation hole 111 and a plurality of 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 component 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;

[0036] The second ventilation holes 112 are arranged around the first ventilation hole 111, and one of the second ventilation holes 112 penetrates the measuring rod part 12 along the axial direction of the main rod 1 and is connected to a hollow front measuring telescopic rod 3; the remaining second ventilation holes 112 penetrate the rod body part 11 along the axial direction of the main rod 1 and are respectively connected to 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.

[0037] 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 between the front measuring hole 31 and the rear measuring hole 41 and the central measuring hole 121 according to the diameter D of the flue to be measured.

[0038] 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. A second pin shaft 8 is provided on the measuring rod portion 12. The other end of the auxiliary rod 6 is hinged to the measuring rod portion 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.

[0039] A push rod 9 is slidably connected to the main rod 1. The push rod 9 is connected to the tilt measuring telescopic rod 5 to change the distance between the tilt measuring hole 54 and the central measuring hole 121.

[0040] Specifically, the measuring assembly 2 is a micro pressure sensor.

[0041] Specifically, the tilt measuring 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 are respectively telescoped along their axial directions.

[0042] One end of the horizontal telescopic rod 51 is fixed at the second vent hole 112. The push rod 9 is connected to the horizontal telescopic rod 51. The tilt telescopic rod 52 is hinged to 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 telescope and the tilt telescopic rod 52 to rotate, so as to change the distance between the tilt measuring hole 54 and the central measuring hole 121.

[0043] The front measuring telescopic rod 3, the rear measuring telescopic rod 4, and the tilt measuring telescopic rod 5 can be telescoped to adapt to any diameter D of the flue to be measured. By manually adjusting the lengths of the front measuring telescopic rod 3, the rear measuring 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 measuring holes 54 and the central measuring hole 121 are on the same straight line and perpendicular to the axis of the main rod 1, and the distances from the front measuring hole 31, the rear measuring hole 41, and the two tilt measuring holes 54 to the central measuring hole 121 are all a fixed proportional length (such as one-fourth) of the diameter D of the flue to be measured.

[0044] The following Figure 3 and 4 further explains the above technical solution:

[0045] Figure 3Schematic diagram of the structure of the wind speed measuring device adjusted according to the diameter D of the flue to be measured. Point B is the center point of the inclined measuring 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 inclined 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-angled side OB has been determined according to the diameter D of the flue to be measured. 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).

[0046] For example: The distances from the front measuring hole 31, the rear measuring hole 41 and the two inclined measuring holes 54 to the central measuring hole 121 are set to one-fourth of the diameter D of the flue to be measured, denoted as m (the distance from the axis center of the second pin shaft 8 to the central measuring hole 121 is ignored). 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 of the auxiliary rod 6, OC, is denoted as a. Then:

[0047] As Figure 3 and Figure 4 shown, in triangle OAC, according to the cosine theorem, we can get ;

[0048] In the right triangle OAB, , 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.

[0049] 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 pre-adjusted, and then the distance of OA is changed by moving the push rod 9. By using the marking scale 13 for marking the distance from point O to point A, the distances from the front measuring hole 31, the rear measuring hole 41 and the two inclined measuring holes 54 to the central measuring hole 121 can be made equal.

[0050] Specifically, the horizontal telescopic rod 51 includes a first fixed rod 511 fixedly connected to the rod body portion 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.

[0051] 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.

[0052] Specifically, a marking scale 13 is provided 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.

[0053] Specifically, both the front measuring telescopic rod 3 and the rear telescopic measuring rod include a third fixed rod 20 and a third moving rod 30 that is 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 measuring telescopic rod 3 is fixedly connected to the measuring rod portion 12, and the third fixed rod 20 in the rear measuring telescopic rod 4 is fixedly connected to the rod body portion 11.

[0054] Embodiment 2, the present invention provides a positionable multi-point wind speed measurement method. Based on the positionable multi-point wind speed measurement device described in Embodiment 1, the measurement method includes the following steps:

[0055] 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;

[0056] 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 and insert the measurement device into the flue to be measured;

[0057] 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.

[0058] Specifically, in step S2, by observing the marking scale 13, the central measuring hole 121 is positioned at the center 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 positioning the central measuring hole 121 at the center of the flue to be measured, the measurement accuracy can be improved.

[0059] The advantages of the present invention are as follows: By pushing the push rod 9, the distances from the front measurement hole 31, the rear measurement hole 41, and the inclined measurement hole 54 to the central measurement hole 121 can be made equal, achieving accurate positioning of the measurement 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 measurement section is obtained by taking the average, improving the accuracy of the measurement results. In addition, the front measurement telescopic rod 3, the rear measurement 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 measurement telescopic rod 5 to facilitate removing the device from the flue to be measured.

[0060] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology 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 protected by the claims of the present invention.

Claims

1. A locatable multi-point wind speed measuring device, characterized in that: Comprising: A main rod, an auxiliary rod and a push rod; The main rod includes a rod body part and a measuring rod part, and a central measuring hole is provided 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 measuring component for obtaining the smoke flow velocity 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 are arranged around the outside of the first ventilation hole, and one of the second ventilation holes axially penetrates through the measuring rod part along the main rod. The measuring rod part is connected with a hollow front measuring telescopic rod; the remaining second ventilation holes axially penetrate through the rod body part along the main rod and are respectively connected with 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 end parts 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; One end of the auxiliary rod is hinged with the inclined measuring telescopic rod through a first pin shaft, the measuring rod part is provided with a second pin shaft, and the other end of the auxiliary rod is hinged with 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; The main rod is slidably connected with the push rod, and the push rod is connected with the inclined measuring telescopic rod to change the distance between the inclined measuring hole and the central measuring hole.

2. The locatable multi-point wind speed measuring device according to claim 1, wherein: The measuring component is a micro pressure sensor.

3. The locatable multi-point wind speed measuring device according to claim 1, characterized in that: 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, and 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 ventilation hole, the push rod is connected with the horizontal telescopic rod, the inclined telescopic rod is hinged with the auxiliary rod, and the push rod slides axially along the main rod to drive 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.

4. The locatable multi-point wind speed measuring device according to claim 3, characterized in that: The horizontal telescopic rod includes a first fixed rod fixedly connected with the rod body part, and the first fixed rod is slidably connected with a first moving rod, and the first moving rod is fixedly connected with the push rod; The inclined telescopic rod includes a second fixed rod connected with the corrugated pipe, the second fixed rod is hinged with the auxiliary rod, and the second fixed rod is slidably connected with a second moving rod.

5. The locatable multi-point wind speed measuring device according to claim 1, wherein: A marking scale is arranged on the outer wall of the main rod.

6. The locatable multi-point wind speed measuring device according to claim 1, characterized in that: Both the front measuring telescopic rod and the rear telescopic measuring rod include a third fixed rod and a third moving rod slidably connected with the inner cavity of the third fixed rod, and the third fixed rod is fixed on the main rod.

7. A locatable multi-point wind speed measurement method, characterized in that: Based on the multi-point wind speed measuring device capable of positioning according to any one of claims 1-6, the measuring method includes the following steps: Step S1, according to the diameter D of the measured flue, 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 measured flue, adjust the length of the inclined telescopic rod and insert the measuring device into the measured flue. Step S3: Push the push rod to slide, drive the horizontal telescopic rod to expand and contract and the inclined telescopic rod to rotate, and by observing the identification scale, adjust the distance between the inclined measurement hole and the central measurement hole to be equal to the distance between the front measurement hole or the rear measurement hole and the central measurement hole.

8. The locatable multi-point wind speed measurement method according to claim 7, characterized in that: In the said step S2, by observing the identification scale, make the central measurement hole located at the central position of the flue to be measured.

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