Flow measuring device
The novel support structure with crossbeams and interconnected pressure tubes addresses measurement inaccuracies in large boilers by minimizing stress and leakage, ensuring accurate airflow measurement.
Patent Information
- Application Number
- CN202422372136.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The increase in size of boiler smoke and air ducts leads to increased stress on measurement elements, causing deformation and leakage of pressure measurement tubes, resulting in measurement inaccuracies.
A novel design comprising a support structure with multiple columns and crossbeams that separate the airflow channel into sub-channels, with measurement elements fixed to the crossbeams, and a network of pressure tubes connecting to a central pipe, minimizing stress on the measurement components and ensuring equal path lengths for accurate measurement.
This design maintains measurement accuracy by reducing deformation and leakage of pressure tubes, allowing for precise airflow measurement without increasing the size or weight of the measurement elements.
Smart Images
Figure CN223106997U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of flue and air duct flow measurement, and specifically, to a flow measurement device. Background Art
[0002] In order to further increase the boiler efficiency, thermal power plants have increased the capacity of boilers. While the boilers are enlarged, the sizes of their flues and air ducts have also increased significantly, and the sizes of the measuring elements in the flues and air ducts have also increased with the increase in the sizes of the flues and air ducts. However, in the flues and air ducts, since most traditional measuring elements directly use pressure transmission pipes as support components to support the measuring elements, this will inevitably lead to an increase in the force on the pressure transmission pipes, and then the pressure transmission pipes are prone to deformation after long-term use, and then leakage occurs, resulting in errors in the measurement accuracy of the measuring elements. Summary of the Utility Model
[0003] The purpose of the present disclosure is to provide a flow measurement device that can solve the related problems existing in the prior art.
[0004] To achieve the above purpose, the present disclosure provides a flow measurement device, including a support assembly and a measurement assembly; the support assembly includes multiple columns and multiple cross beams, both ends of the columns are adapted to be fixed on the upper cavity wall and the lower cavity wall of the air flow channel, and the multiple columns are used to divide the air flow channel into multiple sub-channels. Along the length direction of the columns, the same number of cross beams are arranged at intervals on each column, and the middle of the cross beam is fixed to the column. The first end and the second end of each cross beam are respectively located in adjacent two sub-air flows; the measurement assembly includes a pressure transmission pipe network and multiple measuring elements. The first end and the second end of the cross beam are both fixed with the vertically arranged measuring elements. The pressure transmission pipe network includes a first pressure transmission pipe, a second pressure transmission pipe, a connection pipe network, and a pressure transmission main pipe. One end of the first pressure transmission pipe is connected to the measuring element at the first end of the cross beam, and one end of the second pressure transmission pipe is connected to the pressure transmission pipe at the second end of the cross beam. The other ends of the first pressure transmission pipe and the second pressure transmission pipe connected to the measuring elements on the same cross beam are connected and form a set of pressure collecting points. Multiple sets of pressure collecting points are connected to the first end of the pressure transmission main pipe through the connection pipe network, and the second end of the pressure transmission main pipe is used to penetrate out of the air flow channel.
[0005] Optionally, the length of the first pressure transmission pipe is equal to the length of the second pressure transmission pipe, and the shortest path for any pressure collecting point to connect to the first end of the pressure transmission main pipe through the connection pipe network is equal.
[0006] Optionally, the connecting pipe network includes a first connecting pipe, a second connecting pipe, and a third connecting pipe; horizontally, adjacent two pressure collecting points are connected by the first connecting pipe; vertically, the middle parts of adjacent two first connecting pipes are connected by the second connecting pipe; the middle parts of adjacent two second connecting pipes are connected by the third connecting pipe, and the first end of the pressure transmission main pipe is connected to the middle part of the third connecting pipe.
[0007] Optionally, vertically, adjacent two pressure collecting points are connected to the same first connecting pipe.
[0008] Optionally, there are two sets of the measuring components, and the two sets of measuring components are arranged corresponding to the flowing direction of the gas in the air flow channel. The measuring elements in the two sets of measuring components are attached to and fixed on the cross beam, so that the measuring element of one of the two sets of measuring components constitutes a dynamic pressure measuring element, and the other constitutes a static pressure measuring element.
[0009] Optionally, the cross beam includes a first support beam and a second support beam. A first arc-shaped member is arranged at one end of the first support beam close to the second support beam. The other end of the first support beam constitutes the first end of the cross beam. A second arc-shaped member is arranged at one end of the second support beam close to the first support beam. The other end of the second support beam constitutes the second end of the cross beam. The two ends of the first arc-shaped member are detachably connected to the two ends of the second arc-shaped member respectively and are pressed on the column; an installation ear is detachably connected to the cross beam, and the measuring elements are all fixed on the installation ear.
[0010] Optionally, an extension pipe is arranged in the measuring element. One end of the extension pipe is connected to the pressure transmission pipe network, and the other end of the extension pipe faces vertically downward.
[0011] Optionally, a first dust cleaning component is arranged in the measuring element. The first dust cleaning component is located above the extension pipe and includes a first fixing member and a first disturbing rod swingably connected to the first fixing member. The first fixing member is fixed on the pipe wall of the measuring element.
[0012] Optionally, a second dust cleaning component is arranged in the measuring element. The second dust cleaning component is located below the extension pipe and includes a second fixing member and a second disturbing rod swingably connected to the second fixing member. The second fixing member is fixed on the pipe wall of the measuring element.
[0013] Optionally, a third dust cleaning component is arranged in the extension pipe. The third dust cleaning component includes a third fixing member and a third disturbing member swingably connected to the third fixing member. The third fixing member is fixed to the inner wall of the extension pipe. The third disturbing member includes a first disturbing portion, a second disturbing portion and a third disturbing portion. The first disturbing portion is swingably connected to the third fixing member. The second disturbing portion and the third disturbing portion are located outside the extension pipe. One end of the second disturbing portion and one end of the third disturbing portion are both fixed to the first disturbing portion. The other ends of the second disturbing portion and the second disturbing portion are both located in the gap between the extension pipe and the measuring element.
[0014] Through the above technical solutions, (describe the beneficial effects of the present invention in combination with technical solutions, working principles, etc.).
[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:
[0017] Figure 1 is a schematic structural diagram of a flow measurement device provided by an exemplary embodiment of the present disclosure installed in an air flow channel;
[0018] Figure 2 is Figure 1 a partial enlarged view of part A in
[0019] Figure 3 is Figure 2 a partial enlarged view of part B in
[0020] Figure 4 is Figure 1 a partial enlarged view of part C in
[0021] Figure 5 is a schematic structural diagram of a part of the flow measurement device, wherein the measuring element is in a sectional structure;
[0022] Figure 6 is Figure 5 a partial enlarged view of part D in
[0023] Figure 7 is Figure 5 a partial enlarged view of part E in
[0024] Figure 8 is Figure 5 a partial enlarged view of part F in
[0025] Description of Reference Numerals
[0026] 10-air flow channel; 20-support component; 30-measurement component; 40-pressure point;
[0027] 100-column;
[0028] 200-crossbeam; 210-first supporting beam; 211-first arc-shaped member; 220-second supporting beam; 221-second arc-shaped member; 230-mounting ear;
[0029] 300- measuring element; 310- dynamic pressure measuring element; 320- static pressure measuring element;
[0030] 400-pressure transmission pipe network; 410-first pressure transmission pipe; 420-second pressure transmission pipe; 430-connecting pipe network; 431-first connecting pipe; 432-second connecting pipe; 433-third connecting pipe; 440-pressure transmission main pipe;
[0031] 500-Extension tube;
[0032] 600-first dust cleaning assembly; 610-first fixing member; 620-first disturbance rod;
[0033] 700 - second dust cleaning assembly; 710 - second fixing member; 720 - second disturbance rod;
[0034] 800 - third cleaning assembly; 810 - third fixing member; 820 - third disturbance rod; 830 - fourth disturbance rod; 840 - fifth disturbance rod. DETAILED DESCRIPTION
[0035] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0036] In the description of the present disclosure, it should be understood that the terms "upper", "lower" and the like indicate positions or location relationships based on the accompanying drawings (such as Figure 1 ) is defined only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "inside" and "outside" refer to the inside and outside of the corresponding structural contour. In addition, the terms "first", "second", etc. are only used to distinguish one element from another, and do not have order and importance.
[0037] In the description of the present disclosure, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "connected", "linked", and "installed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.
[0038] As Figures 1 to 8 shown, the present disclosure provides a flow measurement device, including a support assembly 20 and a measurement assembly 30; the support assembly 20 includes a plurality of columns 100 and a plurality of cross beams 200. Both ends of the column 100 are adapted to be fixed on the upper cavity wall and the lower cavity wall of the air flow channel 10. The plurality of columns 100 are used to divide the air flow channel 10 into a plurality of sub-channels. Along the length direction of the column 100, each column 100 is provided with cross beams 200 having the same number at intervals, and the middle part of the cross beam 200 is fixed on the column 100. The first end and the second end of each cross beam 200 are respectively located in two adjacent sub-channels; the measurement assembly 30 includes a pressure transmission pipe network 400 and a plurality of measurement elements 300. The first end and the second end of the cross beam 200 are both fixed with vertically arranged measurement elements 300. The pressure transmission pipe network 400 includes a first pressure transmission pipe 410, a second pressure transmission pipe 420, a connection pipe network 430, and a pressure transmission main pipe 440. One end of the first pressure transmission pipe 410 is connected to the measurement element 300 at the first end of the cross beam 200, and one end of the second pressure transmission pipe 420 is connected to the pressure transmission pipe at the second end of the cross beam 200. The other ends of the first pressure transmission pipe 410 and the second pressure transmission pipe 420 connected to the measurement elements 300 on the same cross beam 200 are connected and form a set of pressure collecting points 40. A plurality of sets of pressure collecting points 40 are connected to the first end of the pressure transmission main pipe 440 through the connection pipe network 430, and the second end of the pressure transmission main pipe 440 is used to penetrate out of the air flow channel 10.
[0039] Through the above technical solution, the support assembly 20 is arranged in the air flow channel 10. On the one hand, the column 100 can divide the air flow channel 10 into a plurality of sub-channels, and cooperate with the measurement elements 300 arranged at both ends of the cross beam 200, so that each sub-air duct is provided with a measurement element 300 for sampling. Thus, when the size of the air flow channel 10 increases, it is not necessary to increase the volume and weight of the measurement element 300, and the air flow obtained by the measurement elements 300 is aggregated through the connection pipe network 430 and the pressure transmission main pipe 440, and the flow data of the entire air flow channel 10 is obtained after the pressure transmission main pipe 440 is connected to an external device.
[0040] On the other hand, since the measuring element 300 is fixed on the cross beam 200 and the cross beam 200 bears the weight of the measuring element 300, therefore, the first pressure transmission pipe 410, the second pressure transmission pipe 420, the connecting pipe network 430 and the main pressure transmission pipe 440 will not be affected by the weight of the measuring element 300, so that the leakage caused by the deformation of the first pressure transmission pipe 410, the second pressure transmission pipe 420, the connecting pipe network 430 and the main pressure transmission pipe 440 due to stress can be reduced.
[0041] Furthermore, by connecting the first pressure transmission pipe 410 and the second pressure transmission pipe 420 to form a set of pressure collecting points 40, and connecting multiple sets of pressure collecting points 40 to the main pressure transmission pipe 440 through the connecting pipe network, the layout and installation of the pressure transmission pipes between the measuring element 300 and the main pressure transmission pipe 440 can be more conveniently carried out.
[0042] It should be noted that the measuring element 300 is a pipe body with open ends at both ends, and the axis of the measuring element 300 is vertically arranged. The air flow in the flue or wind tunnel can enter the pipe body through the openings at both ends of the pipe body, and is transmitted to the measuring equipment outside the air duct through the first pressure transmission pipe 410, the connecting pipe network 430 and the main pressure transmission pipe 440 for measurement, or is transmitted to the measuring equipment outside the air duct through the second pressure transmission pipe 420, the connecting pipe network 430 and the main pressure transmission pipe 440 for measurement. The measuring equipment here can be a differential pressure transmitter. The air flow channel 10 can be a flue or an air duct.
[0043] In some optional embodiments, the length of the first pressure transmission pipe 410 is equal to the length of the second pressure transmission pipe 420, and the shortest paths of any pressure collecting point 40 connecting to the first end of the main pressure transmission pipe 440 through the connecting pipe network 430 are equal. With this setting, the shortest paths between each measuring element 300 and the main pressure transmission pipe 440 can be made equal, so as to reduce the measurement error caused by different paths between different measuring elements 300.
[0044] As Figure 2 and Figure 4 shown, for the specific structure of the connecting pipe network 430, in some optional embodiments, the connecting pipe network 430 includes a first connecting pipe 431, a second connecting pipe 432 and a third connecting pipe 433; along the horizontal direction, adjacent pressure collecting points 40 are connected by the first connecting pipe 431; along the vertical direction, the middle parts of adjacent first connecting pipes 431 are connected by the second connecting pipe 432; the middle parts of adjacent second connecting pipes 432 are connected by the third connecting pipe 433, and the first end of the main pressure transmission pipe 440 is connected to the middle part of the third connecting pipe 433.
[0045] By setting the first connecting pipe 431, the second connecting pipe 432 and the third connecting pipe 433, the shortest paths between each measuring element 300 and the main pressure transmission pipe 440 can be made equal. Specifically, as Figure 1. Figure 2 and Figure 4 As shown, at each pressure collecting point 40, the first end of the pressure transmission main pipe 440 is connected to the first end of the pressure transmission main pipe 440 through the first connecting pipe 431, the second connecting pipe 432 with a length of 1 / 2, and the third connecting pipe 433 with a length of 1 / 2. Moreover, the lengths of the first pressure transmission pipe 410 and the second pressure transmission pipe 420 connected to each pressure collecting point 40 are equal. Therefore, the shortest path between each measuring element 300 and the pressure transmission main pipe 440 is equal.
[0046] As Figure 1 and Figure 2 As shown, in some optional embodiments, along the vertical direction, two pressure collecting points 40 form a pressure collecting point group, and the two pressure collecting points 40 within each pressure collecting point group are connected to the same first connecting pipe 431. Such a setting can reduce the number of the first connecting pipes 431, which is beneficial to simplifying the connecting pipe network 430.
[0047] In order to improve the accuracy of the measurement result, in some optional embodiments, there are two groups of measurement assemblies 30. The two groups of measurement assemblies 30 are arranged corresponding to the flow direction of the internal gas in the air flow channel 10. The measuring elements 300 in the two groups of measurement assemblies 30 are attached to and fixed on the cross beam 200, so that the one located upstream in the two groups of measurement assemblies 30 constitutes a dynamic pressure measuring element 310, and the one located downstream constitutes a static pressure measuring element 320.
[0048] The measuring elements 300 in the two groups of measurement assemblies 30 respectively constitute a dynamic pressure measuring element 310 and a static pressure measuring element 320. Among them, the dynamic pressure measuring element 310 is on the windward side of the air flow channel 10, and the static pressure measuring element 320 is on the leeward side of the air flow channel 10. The dynamic pressure measuring element 310 is located upstream of the static pressure measuring element 320. Through the dynamic pressure measuring element 310 and the static pressure measuring element 320, a more accurate measurement result can be obtained. The dynamic pressure measuring element 310 and the static pressure measuring element 320 are attached, so that the dynamic pressure measuring element 310 can play a role in blocking wind for the static pressure measuring element 320.
[0049] As Figure 2 and Figure 3As shown, in order to facilitate the fixing of the cross beam 200 to the column 100, in some alternative embodiments, the cross beam 200 includes a first beam 210 and a second beam 220. At one end of the first beam 210 close to the second beam 220, a first arc-shaped member 211 is provided. The other end of the first beam 210 forms the first end of the cross beam 200. At one end of the second beam 220 close to the first beam 210, a second arc-shaped member 221 is provided. The other end of the second beam 220 forms the second end of the cross beam 200. The two ends of the first arc-shaped member 211 are respectively detachably connected to the two ends of the second arc-shaped member 221 and are crimped onto the column 100. An installation ear 230 is detachably connected to the cross beam 200, and the measuring elements 300 are all fixed to the installation ear 230.
[0050] By connecting the two ends of the first arc-shaped member 211 of the first beam 210 and the two ends of the second arc-shaped member 221 of the second beam 220 respectively, the first arc-shaped member 211 and the second arc-shaped member 221 can be crimped and fixed to the circular column 100, realizing the fixed connection between the cross beam 200 and the column 100. At the same time, during the process of fixing the cross beam 200 to the column 100, the height of the cross beam 200 can be adjusted to adapt to air flow channels 10 of different sizes.
[0051] It should be noted that the first arc-shaped member 211 and the second arc-shaped member 221 can be connected and fixed by bolts and nuts as shown in Figure 3 or can be fixed by a snap structure.
[0052] Of course, in other embodiments, threaded holes can also be opened on the column 100, through holes can be provided on the cross beam 200, and bolts can be used to pass through the through holes and then be screwed into the threaded holes to directly fix the cross beam 200 to the column 100.
[0053] In order to improve the connection stability of the cross beam 200 on the column 100, in some alternative embodiments, flexible pads can also be provided on the first arc-shaped member 211 and the second arc-shaped member 221, so that the flexible members can be crimped between the first arc-shaped member 211 and the column 100 and between the second arc-shaped member 221 and the column 100. The elastic force generated after the flexible members are compressed is used to improve the connection stability between the cross beam 200 and the column 100. The flexible pads can be rubber, plastic, etc.
[0054] Such as Figure 5 and Figure 8As shown, in order to reduce the entry of debris in the air flow channel 10 into the first pressure transmission pipe 410 and the second pressure transmission pipe 420 and affect the flow rates of the first pressure transmission pipe 410 and the second pressure transmission pipe 420, in some alternative embodiments, an extension pipe 500 is provided inside the measuring element 300. One end of the extension pipe 500 is connected to the corresponding first pressure transmission pipe 410 or second pressure transmission pipe 420, and the other end of the extension pipe 500 faces vertically downward.
[0055] Since the vertically downward end of the extension pipe 500 is an open end, when debris enters the first pressure transmission pipe 410 or the second pressure transmission pipe 420, it needs to move upward, while the debris will move downward under the action of gravity. Therefore, the probability of debris entering the first pressure transmission pipe 410 or the second pressure transmission pipe 420 can be reduced.
[0056] It should be noted that the connection of one end of the extension pipe 500 to the corresponding first pressure transmission pipe 410 or second pressure transmission pipe 420 means that when the measuring element 300 is connected to the first pressure transmission pipe 410, the extension pipe 500 inside the measuring element 300 is connected to the first pressure transmission pipe 410 corresponding to the measuring element 300. When the measuring element 300 is connected to the second pressure transmission pipe 420, the extension pipe 500 inside the measuring element 300 is connected to the second pressure transmission pipe 420 corresponding to the measuring element 300.
[0057] As Figure 6 shown, in order to reduce the dust accumulation inside the measuring element 300, in some alternative embodiments, a first dust cleaning assembly 600 is provided inside the measuring element 300. The first dust cleaning assembly 600 is located above the extension pipe 500 and includes a first fixing member 610 and a first disturbing rod 620 swingably connected to the first fixing member 610. The first fixing member 610 is fixed to the pipe wall of the measuring element 300. When the air flow enters the measuring element 300 from the upper end opening of the measuring element 300 and passes through the first dust cleaning assembly 600, the air flow will drive the first disturbing rod 620 to swing relative to the first fixing member 610. During the swinging process of the first disturbing rod 620, it will collide with the part of the measuring element 300 located above the extension pipe 500, shaking off the dust attached to the part of the measuring element 300 located above the extension pipe 500, and preventing the dust from affecting the flow rate when connected to the measuring element 300.
[0058] As Figure 7As shown, in some alternative embodiments, a second dust cleaning assembly 700 is provided within the measuring element 300. The second dust cleaning assembly 700 is located below the extension pipe 500 and includes a second fixing member 710 and a second disturbing rod 720 swingably connected to the second fixing member 710. The second fixing member 710 is fixed to the pipe wall of the measuring element 300. When the air flow enters the measuring element 300 through the lower end opening of the measuring element 300 and passes through the first dust cleaning assembly 600, the air flow will drive the second disturbing rod 720 to swing relative to the second fixing member 710. During the swinging process of the second disturbing rod 720, it will collide with the part of the measuring element 300 located below the extension pipe 500, shaking off the dust adhering to the part of the measuring element 300 located below the extension pipe 500, and preventing the dust from affecting the flow rate when connected to the measuring element 300.
[0059] As Figure 8 shown, in some alternative embodiments, a third dust cleaning assembly 800 is provided within the extension pipe 500. The third dust cleaning assembly 800 includes a third fixing member 810 and a third disturbing rod 820 swingably connected to the third fixing member 810. The third fixing member 810 is fixed to the inner wall of the extension pipe 500. Fourth disturbing rods 830 and fifth disturbing rods 840 are provided on the opposite side walls of the third disturbing rod 820. The fourth disturbing rods 830 and the fifth disturbing rods 840 are located outside the extension pipe 500, and the free ends of the fourth disturbing rods 830 and the free ends of the fifth disturbing rods 840 are both located in the gap between the extension pipe 500 and the measuring element 300.
[0060] During the process of the air flow entering the extension pipe 500, it will drive the third disturbing rod 820 to swing relative to the third fixing member 810 to shake off the dust adhering to the extension pipe 500. At the same time, the fourth disturbing rods 830 and the fifth disturbing rods 840 swing synchronously under the swinging action of the third disturbing rod 820 to shake off the dust at the corresponding parts of the extension pipe 500 and the measuring element 300.
[0061] Since the above-mentioned cross beam 100 and the column are detachably connected, and the measuring assembly 20 and the support assembly 30 are also detachably connected, the number of columns 100, the number of cross beams 200, the number of measuring elements 0300, and the number of pressure transmission pipe networks 400 inside the flow measurement device can be adjusted accordingly according to the size of different air flow channels 10.
[0062] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0063] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not further explain various possible combinations.
[0064] In addition, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.
Claims
1. A flow measurement device, characterized in that, It includes a support component and a measurement component; The support component includes multiple vertical columns and multiple cross beams. Both ends of the vertical columns are adapted to be fixed on the upper cavity wall and the lower cavity wall of the air flow channel. The multiple vertical columns are used to divide the air flow channel into multiple sub-channels. Along the length direction of the vertical columns, each vertical column is provided with cross beams having the same number at intervals, and the middle part of the cross beam is fixed on the vertical column. The first end and the second end of each cross beam are respectively located in two adjacent sub-channels; The measurement component includes a pressure transmission pipe network and multiple measurement elements. The first end and the second end of the cross beam are both fixed with the vertically arranged measurement elements. The pressure transmission pipe network includes a first pressure transmission pipe, a second pressure transmission pipe, a connection pipe network, and a pressure transmission main pipe. One end of the first pressure transmission pipe is connected to the measurement element at the first end of the cross beam. One end of the second pressure transmission pipe is connected to the pressure transmission pipe at the second end of the cross beam. The other ends of the first pressure transmission pipe and the second pressure transmission pipe connected to the measurement elements on the same cross beam are connected to form a set of pressure collecting points. Multiple sets of the pressure collecting points are connected to the first end of the pressure transmission main pipe through the connection pipe network. The second end of the pressure transmission main pipe is used to penetrate out of the air flow channel.
2. The flow measurement device according to claim 1, characterized in that, The length of the first pressure transmission pipe is equal to the length of the second pressure transmission pipe, and the shortest paths for any of the pressure collecting points to be connected to the first end of the pressure transmission main pipe through the connection pipe network are all equal.
3. The flow measurement device according to claim 2, characterized in that, The connection pipe network includes a first connection pipe, a second connection pipe, and a third connection pipe; Along the horizontal direction, adjacent two of the pressure collecting points are connected through the first connection pipe; Along the vertical direction, the middle parts of adjacent two of the first connection pipes are connected through the second connection pipe; The middle parts of adjacent two of the second connection pipes are connected through the third connection pipe, and the first end of the pressure transmission main pipe is connected to the middle part of the third connection pipe.
4. The flow measurement device according to claim 3, wherein Along the vertical direction, two pressure collecting points form a pressure collecting point group. The two pressure collecting points in each pressure collecting point group are connected to the same first connection pipe.
5. The flow measurement device according to any one of claims 1-4, wherein There are two sets of the measurement components. The two sets of the measurement components are arranged corresponding to the flow direction of the gas in the air flow channel. The measurement elements in the two sets of the measurement components are attached to and fixed on the cross beam, so that the one located upstream in the two sets of the measurement components constitutes a dynamic pressure measurement element, and the one located downstream constitutes a static pressure measurement element.
6. The flow measurement device according to claim 1, characterized in that, The cross beam includes a first support beam and a second support beam. A first arc-shaped member is arranged at one end of the first support beam close to the second support beam. The other end of the first support beam constitutes the first end of the cross beam. A second arc-shaped member is arranged at one end of the second support beam close to the first support beam. The other end of the second support beam constitutes the second end of the cross beam. The two ends of the first arc-shaped member are respectively detachably connected to the two ends of the second arc-shaped member and are pressed on the vertical column; an installation ear is detachably connected to the cross beam, and the measurement elements are all fixed on the installation ear.
7. The flow measurement device according to claim 1, characterized in that An extension pipe is provided inside the measuring element. One end of the extension pipe is connected to the corresponding first pressure transmission pipe or second pressure transmission pipe, and the other end of the extension pipe faces vertically downward.
8. The flow measurement device according to claim 7, characterized in that, A first dust cleaning assembly is provided inside the measuring element. The first dust cleaning assembly is located above the extension pipe and includes a first fixing member and a first disturbing rod swingably connected to the first fixing member. The first fixing member is fixed to the pipe wall of the measuring element.
9. The flow measurement device according to claim 7, characterized in that, A second dust cleaning assembly is provided inside the measuring element. The second dust cleaning assembly is located below the extension pipe and includes a second fixing member and a second disturbing rod swingably connected to the second fixing member. The second fixing member is fixed to the pipe wall of the measuring element.
10. The flow measurement device according to claim 7, characterized in that, A third dust cleaning assembly is provided inside the extension pipe. The third dust cleaning assembly includes a third fixing member and a third disturbing rod swingably connected to the third fixing member. The third fixing member is fixed to the inner wall of the extension pipe. Fourth and fifth disturbing rods are provided on the opposite side walls of the third disturbing rod. The fourth disturbing rod and the fifth disturbing rod are located outside the extension pipe, and the free ends of the fourth disturbing rod and the fifth disturbing rod are both located in the gap between the extension pipe and the measuring element.