Positionable multi-point wind speed measuring device

Abstract

The utility model provides a positionable multi-point wind speed measuring device, a main rod 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 hollow front measuring telescopic rod; the other second vent holes are respectively connected with a hollow 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 utility model relates to wind speed measurement technical field especially relates to a kind of positionable multipoint wind speed measuring device. BACKGROUND

[0002] Currently, there are two main methods for calculating greenhouse gas emissions internationally, namely accounting method and measurement method. The accounting method mainly calculates the amount of greenhouse gas emissions by the amount of fuel burned, while the measurement method mainly measures the emissions directly by using the flue gas online monitoring system (CEMS). The measurement method using CEMS can obtain the amount of greenhouse gas emissions by directly measuring parameters such as flue gas flow rate, CO2 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 China's carbon trading market, the data actually measured by the CEMS system is expected to become an effective reference for carbon emission monitoring. Therefore, accurate measurement of flue gas flow rate is of great significance for carbon emission monitoring, carbon emission rights trading, etc.

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

[0004] The Pitot tube flowmeter is a single-point measurement for flue gas flow rate, with low accuracy, especially not convenient to use in large flues or uneven flow fields. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to provide a positionable multipoint wind speed measuring device that can measure the wind speed values at multiple points inside the flue simultaneously to measure the average wind speed on the cross section of the flue and improve the accuracy of the measurement results.

[0006] The utility model is implemented as follows:

[0007] In the first aspect, the utility model provides a positionable multipoint wind speed measuring device, which comprises 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 formed in the side surface of the measuring rod part;

[0008] The rod body part is provided with a first air hole and a plurality of second air holes, and a measuring assembly for obtaining flue gas flow rate is arranged in the first air hole and the second air holes, the first air hole is arranged at the axis of the rod body part and communicates with the central measuring hole;

[0009] The second venting hole surrounds the first venting hole, and one of the second venting holes penetrates the rod body along the axial direction of the main rod and is connected with a hollow front measuring telescopic rod; the rest of the second venting holes penetrate the rod body 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 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 consistent with that of the central measuring hole;

[0010] The measuring device further comprises an auxiliary rod, one end of the auxiliary rod is hinged to the inclined measuring telescopic rod through a first pin shaft, the rod body is provided with a second pin shaft, the other end of the auxiliary rod is hinged to the rod body through the second pin shaft, and in the vertical direction, the axis of the second pin shaft coincides with the central measuring hole;

[0011] The main rod is slidingly connected with a push 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 assembly is a micro pressure sensor.

[0013] Further, the inclined measuring telescopic rod comprises a horizontal telescopic rod, an inclined telescopic rod and a bellows connected between the horizontal telescopic rod and the inclined telescopic rod, the horizontal telescopic rod and the inclined telescopic rod are respectively telescopic along the axial direction thereof;

[0014] One end of the horizontal telescopic rod is fixed at the second through 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, drives the horizontal telescopic rod to telescope 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 comprises a first fixed rod fixedly connected with the rod body, the first fixed rod is slidingly connected with a first moving rod, and the first moving rod is fixedly connected with the push rod;

[0016] The inclined telescopic rod comprises a second fixed rod connected with the bellows, the second fixed rod is hinged to the auxiliary rod, and the second fixed rod is slidingly connected with a second moving rod.

[0017] Further, the outer wall of the main rod is provided with a mark scale.

[0018] Further, the front measuring telescopic rod and the rear telescopic measuring rod each comprise a third fixed rod and a third moving rod slidingly connected with the inner cavity of the third fixed rod, and the third fixed rod is fixed on the main rod.

[0019] Secondly, this utility model provides a locationable multi-point wind speed measurement method, based on the locationable multi-point wind speed measurement device described in the first aspect, the measurement method comprising the following steps:

[0020] Step S1: Based on the diameter D of the flue being measured, adjust the lengths of the front and rear measuring telescopic rods so that the distances from the front and rear measuring holes to the center measuring hole are equal.

[0021] Step S2: Adjust the length of the tilting telescopic rod according to the diameter D of the flue to be measured, and extend the measuring device into the flue to be measured;

[0022] Step S3: Push the push rod to slide, causing the horizontal telescopic rod to extend and the inclined telescopic rod to rotate. By observing the marked scale, adjust the distance from the inclined measuring hole to the center measuring hole to be equal to the distance from the front measuring hole or the rear measuring hole to the center measuring hole.

[0023] Furthermore, in step S2, the center measuring hole is positioned at the center of the flue being measured by observing the marked scale.

[0024] The advantages of this invention are as follows: By pushing the push rod, the distances from the front measuring hole, rear measuring hole, and inclined measuring hole to the center measuring hole are all equal, achieving accurate positioning of the measuring point. Simultaneously, it measures the wind speed at multiple points within the flue being measured and obtains the average wind speed across the measuring section by averaging, thus improving the accuracy of the measurement results. Furthermore, the front measuring telescopic rod, rear measuring telescopic rod, horizontal telescopic rod, and inclined telescopic rod are all telescopic structures; the sliding push rod can retract the inclined measuring telescopic rod, facilitating the removal of the device from the flue being measured. Attached Figure Description

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

[0026] Figure 1 This is a schematic diagram of the structure of a positionable multi-point wind speed measuring device according to the present invention. Figure 1 .

[0027] Figure 2 This is a schematic diagram of the structure of a positionable multi-point wind speed measuring device according to the present invention. Figure 2 .

[0028] Figure 3 This is a schematic diagram of the wind speed measuring device of this utility model after adjustment according to the diameter D of the flue being measured.

[0029] Figure 4 for Figure 3 The diagram shows a simplified version of the structure.

[0030] Figure 5This is a schematic diagram of the front or rear measuring telescopic rod structure of this utility model.

[0031] Figure 6 This is a schematic diagram of the horizontal telescopic rod structure of this utility model.

[0032] Explanation of the labels in the diagram:

[0033] 1. Main rod; 11. Rod body; 111. First vent; 112. Second vent; 12. Measuring rod; 121. Central measuring hole; 13. Marking scale; 2. Measuring assembly; 3. Front measuring telescopic rod; 31. Front measuring hole; 4. Rear measuring telescopic rod; 41. Rear measuring hole; 5. Inclined measuring telescopic rod; 51. Horizontal telescopic rod; 511. First fixed rod; 512. First moving rod; 52. Inclined telescopic rod; 521. Second fixed rod; 522. Second moving rod; 53. Bellows; 54. Inclined measuring hole; 6. Auxiliary rod; 7. First pin; 8. Second pin; 9. Push rod; 20. Third fixed rod; 30. Third moving rod. Detailed Implementation

[0034] Example 1, please refer to Figures 1 to 6 This utility model provides a positioning multi-point wind speed measuring device, including a main rod 1, which is composed of a rod body 11 and a measuring rod 12 connected to one end of the rod body 11. A central measuring hole 121 is provided on the side of the measuring rod 12.

[0035] The rod body 11 is provided with a first ventilation hole 111 and several second ventilation holes 112. Four second ventilation holes 112 are provided. A measuring component 2 for obtaining the flue gas velocity is provided in both the first ventilation hole 111 and the second ventilation hole 112. The first ventilation hole 111 is located at the axis of the rod body 11 and is connected to the central measuring hole 121.

[0036] The second vent 112 surrounds the outside of the first vent 111, and one of the second vents 112 passes through the measuring rod portion 12 along the axial direction of the main rod 1 and is connected to a hollow front measuring telescopic rod 3; the remaining second vents 112 pass through the rod body portion 11 along the axial direction of the main rod 1 and are respectively connected to a hollow rear measuring telescopic rod 4 and an inclined measuring telescopic rod 5; the ends of the front measuring telescopic rod 3, the rear measuring telescopic rod 4 and the inclined measuring telescopic rod 5 are respectively provided with a front measuring hole 31, a rear measuring hole 41 and an inclined measuring hole 54, and the orientation of the front measuring hole 31, the rear measuring hole 41 and the inclined measuring hole 54 is consistent with that of the central measuring hole 121.

[0037] Both the front measuring telescopic rod 3 and the rear measuring telescopic rod 4 can extend and retract along their own axial direction to adjust the distance between the front measuring hole 31 and the rear measuring hole 41 and the center measuring hole 121 according to the diameter D of the flue being measured.

[0038] The measuring device also includes an auxiliary rod 6. One end of the auxiliary rod 6 is hinged to the inclined measuring telescopic rod 5 via a first pin 7. The measuring rod part 12 is provided with a second pin 8. The other end of the auxiliary rod 6 is hinged to the measuring rod part 12 via the second pin 8. In the vertical direction, the axis of the second pin 8 coincides with the central measuring hole 121.

[0039] The main rod 1 is slidably connected to a push rod 9, which is connected to the tilt measuring telescopic rod 5 to change the distance from the tilt measuring hole 54 to the center measuring hole 121.

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

[0041] Specifically, the tilt measuring telescopic rod 5 includes a horizontal telescopic rod 51, an inclined telescopic rod 52, and a corrugated pipe 53 connecting the horizontal telescopic rod 51 and the inclined telescopic rod 52. The horizontal telescopic rod 51 and the inclined telescopic rod 52 extend and retract along their respective axes.

[0042] One end of the horizontal telescopic rod 51 is fixed at the second through hole. The push rod 9 is connected to the horizontal telescopic rod 51. The inclined telescopic rod 52 is hinged to the auxiliary rod 6. The push rod 9 slides along the axial direction of the main rod 1, causing the horizontal telescopic rod 51 to extend and the inclined telescopic rod 52 to rotate, so as to change the distance from the inclined measuring hole 54 to the central measuring hole 121.

[0043] The telescopic design of the front measuring rod 3, the rear measuring rod 4, and the inclined measuring rod 5 allows for adaptation to any measured flue diameter D. By manually adjusting the lengths of the front measuring rod 3, the rear measuring rod 4, and the two inclined measuring rods 52, and by adjusting the angle of the two inclined measuring rods 52 using the push rod 9, the two inclined measuring holes 54 are aligned with the central measuring hole 121 and perpendicular to the axis of the main rod 1. Furthermore, 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 all fixed proportional lengths (e.g., one-quarter) of the measured flue diameter D.

[0044] The following is in conjunction with the appendix Figure 3 and 4 The above technical solution will be further explained and illustrated as follows:

[0045] Figure 3This is a schematic diagram of the wind speed measuring device after adjustment according to the diameter D of the flue being measured. Point B is the center point of the inclined measuring hole 54, point O is the axis of the second pin 8, point A is the intersection 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 of the first pin 7. The length of the right-angled side OB is determined according to the diameter D of the flue being measured, the length of OC is the length of the auxiliary rod 6, which is also a fixed value, and the length of the hypotenuse AB can be uniquely determined. Then, based on the hypotenuse AB, the value of OA can be uniquely determined, that is, the length that the push rod 9 needs to be pushed (which can be operated according to the scale).

[0046] For example: the distance from the front measuring hole 31, the rear measuring hole 41, and the two inclined measuring holes 54 to the central measuring hole 121 is set to one-quarter of the diameter D of the flue being measured, denoted as m (the distance from the center of the second pin 8 to the central measuring hole 121 is negligible). Then, the distance OB is m, the distance OA is n, the distance AC is b, and the length OC of the auxiliary rod 6 is a. Therefore:

[0047] like Figure 3 and Figure 4 As shown, in triangle OAC, according to the Law of Cosines, we can obtain a 2 =b 2 +n 2 -2nbcos(θ), in right triangle OAB, tan(θ)=m / n, rearranging the two formulas, we get

[0048] In the formula, a, b, and m are all known values ​​from which the value of n can be obtained; according to the Pythagorean theorem, the length of AB is equal to Thus, the length of the inclined telescopic rod 52 can be obtained.

[0049] According to the above formula, m and n have a one-to-one correspondence. Therefore, based on the diameter D of the flue being measured, the length of the inclined telescopic rod 52 is adjusted in advance, and the spacing of OA is changed by moving the push rod 9. By using the marking scale 13 used to mark the distance from point O to point A, the spacing between the front measuring hole 31, the rear measuring hole 41, and the two inclined measuring holes 54 to the center 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 11, and a first movable rod 512 slidably connected to the first fixed rod 511. The first movable 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 bellows 53. The second fixed rod 521 is hinged to the auxiliary rod 6. The second fixed rod 521 is slidably connected to a second movable rod 522.

[0052] Specifically, the outer wall of the main rod 1 is provided with marking scale 13. Marking scale 13 is used to mark the distance from point O to point A.

[0053] Specifically, both the front telescopic measuring rod 3 and the rear telescopic measuring rod include a third fixed rod 20 and a third movable rod 30 slidably connected to the inner cavity of the third fixed rod 20. The third fixed rod 20 is fixed to the main rod 1. Specifically, the third fixed rod 20 in the front telescopic measuring rod 3 is fixedly connected to the measuring rod part 12, and the third fixed rod 20 in the rear telescopic measuring rod 4 is fixedly connected to the rod body part 11.

[0054] Example 2: This utility model provides a locationable multi-point wind speed measurement method, based on the locationable multi-point wind speed measurement device described in Example 1. The measurement method includes the following steps:

[0055] Step S1: Adjust the lengths of the front measuring telescopic rod 3 and the rear measuring telescopic rod 4 according to the diameter D of the flue being measured, so that the distances from the front measuring hole 31 and the rear measuring hole 41 to the center measuring hole 121 are equal. In this embodiment, the distances from the front measuring hole 31 and the rear measuring hole 41 to the center measuring hole 121 are both one-quarter of the diameter D of the flue being measured.

[0056] Step S2: Adjust the length of the tilting telescopic rod 52 according to the diameter D of the flue being measured, that is, adjust the length of AB to... And the measuring device is inserted into the flue being measured;

[0057] Step S3: Push the push rod 9 to slide, causing the horizontal telescopic rod 51 to extend and the inclined telescopic rod 52 to rotate. By observing the scale marking 13, adjust the distance from the inclined measuring hole 54 to the center measuring hole 121 to be equal to the distance from the front measuring hole 31 or the rear measuring hole 41 to the center measuring hole 121. When the scale marking 13 shows OA as n, the distance from the inclined measuring hole 54 to the center measuring hole 121 is also one-quarter of the diameter D of the flue being measured, that is, the value of m is equal to D / 4.

[0058] Specifically, in step S2, the central measuring hole 121 is positioned at the center of the flue being measured by observing the marked scale 13. Given the known diameter D of the flue being measured, if the central measuring hole 121 deviates from the center of the flue, the inner wall of the flue will not fall on the preset marked scale 13. By positioning the central measuring hole 121 at the center of the flue, the accuracy of the measurement can be improved.

[0059] The advantages of this invention are as follows: By pushing the push rod 9, 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 are all equal, achieving accurate positioning of the measuring points. Simultaneously, it measures the wind speed at multiple points within the flue being measured and obtains the average wind speed across the measuring section by averaging, thus improving the accuracy of the measurement results. Furthermore, 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. The sliding push rod 9 can retract the inclined measuring telescopic rod 5, facilitating the removal of the device from the flue being measured.

[0060] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A positionable multi-point wind speed measuring device, characterized in that: It includes a main rod, which is composed of a rod body and a measuring rod connected to one end of the rod body. A central measuring hole is provided on the side of the measuring rod. The rod body is provided with a first ventilation hole and several second ventilation holes. Each of the first and second ventilation holes is provided with a measuring component for obtaining the flue gas velocity. The first ventilation hole is located at the axis of the rod body and is connected to the central measuring hole. One of the second vent 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 other second vent 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; the ends 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 orientation of the front measuring hole, the rear measuring hole and the inclined measuring hole is consistent with the central measuring hole; The measuring device also includes an auxiliary rod, one end of which is hinged to the inclined measuring telescopic rod via a first pin, the measuring rod part is provided with a second pin, the other end of the auxiliary rod is hinged to the measuring rod part via 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 a push rod, which is connected to an inclined measuring telescopic rod to change the distance from the inclined measuring hole to the central measuring hole.

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

3. The multi-point wind speed measuring device with positioning capability as described in claim 1, characterized in that: The tilt measuring telescopic rod includes a horizontal telescopic rod, an inclined telescopic rod, and a corrugated pipe connecting the horizontal telescopic rod and the inclined telescopic rod. The horizontal telescopic rod and the inclined telescopic rod extend and retract along their respective 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, and the inclined telescopic rod is hinged to the auxiliary rod. The push rod slides along the axial direction of the main rod, causing 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 center measuring hole.

4. The positionable multi-point wind speed measuring device as described in claim 3, characterized in that: The horizontal telescopic rod includes a first fixed rod that is fixedly connected to the rod body, a first movable rod that is slidably connected to the first fixed rod, and the first movable rod that is fixedly connected to the push rod. The inclined telescopic rod includes a second fixed rod connected to the bellows, the second fixed rod is hinged to the auxiliary rod, and the second fixed rod is slidably connected to a second movable rod.

5. The positionable multi-point wind speed measuring device as described in claim 1, characterized in that: The outer wall of the main rod is marked with scale markings.

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

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