High-precision measuring assembly for air speed of air outlet

Abstract

The utility model belongs to the technical field of air supply parameter measurement, and provides a high-precision measurement assembly for the air speed of an air outlet, which comprises a plurality of measurement supports distributed at intervals, the measurement supports intersect at one point, a first ventilation duct and a second ventilation duct which are mutually independent are arranged on each measurement support, the first ventilation ducts are communicated, and the second ventilation ducts are communicated; the plurality of total pressure tapping holes are formed in one side of the measuring bracket and are communicated with the first ventilating duct; the plurality of static pressure tapping holes are formed in the other side of the measuring bracket and are communicated with the second ventilating duct; one end of the mounting bracket is connected to the intersection of the measuring bracket, a first conveying channel and a second conveying channel are arranged on the mounting bracket, one end of the first conveying channel is communicated with the plurality of first ventilating channels, and the second conveying channel is communicated with the second channel. By arranging a plurality of measuring brackets and arranging a plurality of total pressure tapping holes and a plurality of static pressure tapping holes on the measuring brackets, accurate measurement of total pressure and static pressure is realized, stable pressure difference is obtained, and accurate control of air volume is further realized.

Description

Technical Field

[0001] The utility model relates to the technical field of air supply parameter measurement, in particular to a high-precision measurement component for the air outlet wind speed. Background Technique

[0002] At present, clean workshops such as pharmaceutical factories and electronic factories usually need to accurately measure the air supply volume of air outlets to ensure that the environmental indicators in the workshops can meet the normal product production requirements.

[0003] There are mainly three existing methods for measuring the air volume, namely measuring with an air volume hood at the air outlet, measuring with a pitot tube principle wind speed sensor in the air duct, and measuring with a thermal type wind speed sensor in the air duct.

[0004] For the measurement method of the wind speed sensor installed on the air duct, due to the lack of necessary installation space at the air outlet, the wind speed measured by the wind speed sensor is not the wind speed at the air outlet, but only the wind speed near the air outlet, resulting in inaccurate measurement. When measuring with an air volume hood at the air outlet, since the air volume hood can generally only be measured by hand, online measurement cannot be achieved, and the real-time performance of the measurement data is poor, and the reliability is difficult to guarantee. Content of the Utility Model

[0005] The utility model provides a high-precision measurement component for the air outlet wind speed, which solves the problems of unstable measurement data and poor data reliability in the above technical background.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A high-precision measurement component for the air outlet wind speed, comprising:

[0008] A plurality of measurement brackets distributed at intervals and converging to one point. Two independent first ventilation channels and second ventilation channels are provided on the plurality of measurement brackets. The first ventilation channels on the plurality of measurement brackets are communicated, and the second ventilation channels of the plurality of measurement brackets are communicated;

[0009] A plurality of total pressure tapping holes are arranged on one side of the measurement bracket, and the total pressure tapping holes are communicated with the first ventilation channel;

[0010] A plurality of static pressure tapping holes are arranged on the other side of the measurement bracket. The static pressure tapping holes are communicated with the second ventilation channel, and the axis of the static pressure tapping hole is parallel to the axis of the total pressure tapping hole;

[0011] An installation bracket, one end of which is connected to the intersection of the measurement brackets. A first conveying channel and a second conveying channel are provided on the installation bracket. One end of the first conveying channel is communicated with the plurality of first ventilation channels, and the second conveying channel is communicated with the plurality of second channels.

[0012] In some embodiments, it further includes a fixing member disposed at the intersection of the plurality of measuring brackets, and the measuring brackets are detachably disposed on the fixing member.

[0013] In some embodiments, the fixing member is provided with a first connection socket matching the number of the measuring brackets, a second connection socket matching the number of the mounting brackets, a first connection cavity, and a second connection cavity. The first connection cavity and the second connection cavity are independent of each other. One end of the measuring bracket is detachably inserted into the first connection socket, and one end of the mounting bracket is detachably disposed in the second connection socket. Among them, the plurality of first ventilation ducts communicate with the first conveying channel through the first connection cavity, and the plurality of second ventilation ducts communicate with the second conveying channel through the second connection cavity.

[0014] In some embodiments, the plurality of measuring brackets are disposed in the same horizontal plane, and the plurality of measuring brackets are evenly spaced.

[0015] In some embodiments, the plurality of total pressure tapping holes are evenly spaced along the length direction of the first ventilation duct.

[0016] In some embodiments, the plurality of static pressure tapping holes are evenly spaced along the length direction of the second ventilation duct, and the number of the static pressure tapping holes is the same as that of the total pressure tapping holes and the positions correspond to each other.

[0017] In some embodiments, one end of the mounting bracket away from the fixing member is provided with a damping positioning hinge, and the damping positioning hinge is used for the rotational mounting of the mounting bracket.

[0018] In some embodiments, it further includes a measuring module, which is provided with a total pressure air pipe joint and a static pressure air pipe joint. The total pressure air pipe joint communicates with the first conveying channel, and the static pressure air pipe joint communicates with the second conveying channel.

[0019] Compared with the prior art, the beneficial effects brought by the present utility model are:

[0020] In this application, by providing a plurality of measuring brackets distributed at intervals, a plurality of total pressure tapping holes and a plurality of static pressure tapping holes are provided on the measuring brackets. Two independent first ventilation ducts and second ventilation ducts are also provided on the measuring brackets. The plurality of static pressure tapping holes communicate with the second ventilation duct, and the plurality of total pressure tapping holes communicate with the first ventilation duct. By providing a plurality of total pressure tapping holes and a plurality of static pressure tapping holes, even if several local total pressure tapping holes or static pressure tapping holes are interfered, it will not affect the measured pressure value, thus improving the measurement accuracy.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned through the practice of the present application. Description of the Drawings

[0022] Figure 1 The first perspective view of a high-precision measurement component for the air outlet wind speed of the present utility model;

[0023] Figure 2 The second perspective view of a high-precision measurement component for the air outlet wind speed of the present utility model;

[0024] Figure 3 The top view of a high-precision measurement component for the air outlet wind speed of the present utility model;

[0025] Figure 4 is Figure 3 The sectional view taken along line A-A in

[0026] Figure 5 is Figure 3 The sectional view taken along line B-B in

[0027] Figure 6 The perspective view of the fixing member of a high-precision measurement component for the air outlet wind speed of the present utility model;

[0028] Figure 7 The side view of the fixing member of the present utility model;

[0029] Figure 8 is Figure 7 The sectional view taken along line C-C in Detailed Description of the Preferred Embodiment

[0030] The following further details the present application in conjunction with specific drawings. In the description of this embodiment, unless otherwise specified, the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the present application must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0031] As Figure 1 , Figure 2 , Figure 4 and Figure 5As shown in the figure, a high-precision measurement component for the air outlet wind speed provided by the present utility model mainly includes a plurality of measurement brackets 1 and a mounting bracket 3. Specifically, a plurality of measurement brackets 2 are spaced apart and converge at a point. A first ventilation duct 11 and a second ventilation duct 12 are provided on the measurement bracket 1, wherein the first ventilation duct 11 and the second ventilation duct 12 are independent of each other. The first ventilation ducts 11 on the plurality of measurement brackets 1 are connected, and the second ventilation ducts 12 on the plurality of measurement brackets 1 are connected;

[0032] A plurality of total pressure tapping holes 111 are arranged at intervals on one side of the measurement bracket 1, and the plurality of total pressure tapping holes 111 are connected to the first ventilation duct 11. During specific installation, the total pressure tapping holes 111 face the air outlet.

[0033] A plurality of static pressure tapping holes 121 are arranged at intervals on the other side of the measurement bracket 1. The static pressure tapping holes 121 are arranged facing away from the air outlet. The plurality of static pressure tapping holes 121 are connected to the second ventilation duct 12. Among them, the axis of the static pressure tapping hole 121 is parallel to the axis of the total pressure tapping hole 111, so that the static pressure tapping hole 121 is arranged relative to the total pressure tapping hole 111. In this embodiment, the total pressure tapping holes 111 are arranged on the upper end face of the measurement bracket 1, and the static pressure tapping holes 121 are arranged on the lower end face of the measurement bracket 1.

[0034] The mounting bracket 3, one end of which is connected to the intersection of the measurement brackets 1. A first conveying channel 31 and a second conveying channel 32 are provided on the mounting bracket 3. One end of the first conveying channel 31 is connected to the plurality of first ventilation ducts 11, and one end of the second conveying channel 32 is connected to the plurality of second channels 32. In this embodiment, the first conveying channel 31 and the second conveying channel 32 are independent of each other. The other end of the first conveying channel 31 is connected to a measurement module to measure the total pressure P1, and the other end of the second conveying channel 32 is also connected to the measurement module to measure the static pressure P2, so as to obtain the dynamic pressure difference P3. Among them, P1 - P2 = P3, P3 = 1 / 2 * ρ * v 2 , ρ is the air density, and the wind speed v is calculated, and then the air volume value can be known.

[0035] By setting a plurality of measurement brackets 1 distributed at intervals, the present utility model makes the capture range of the total pressure and the static pressure larger. A plurality of total pressure tapping holes 111 and static pressure tapping holes 121 distributed at intervals are arranged on the measurement bracket 1, so as to avoid that when one of the total pressure tapping holes 111 or the static pressure tapping holes 111 is blocked, it does not affect the measured total pressure P1 and static pressure P2, making the dynamic pressure difference P3 stable, thus ensuring the accuracy of the measured wind speed value, and then the accuracy of the obtained air volume value. By improving the measurement accuracy, the present utility model can more truly reflect the actual air supply volume at the air outlet, facilitating the accurate control of the air volume value to achieve the purpose of reducing the energy consumption of the fan.

[0036] As another variant of this embodiment, it is also possible to use multiple pipes for substitution, such as aluminum pipes or plastic pipes. Only by arranging the pipes in layers and making them communicate with each other in the same layer. Optionally, each layer of pipes can be integrally formed, and then the two layers of pipes can be relatively fixed.

[0037] In one embodiment, it further includes a fixing member 2, which is arranged at the intersection of multiple measuring brackets 1. The measuring brackets 1 are detachably arranged on the fixing member, so as to facilitate the assembly of this component.

[0038] Further, as Figure 6 - Figure 8 As shown, the fixing member 2 is provided with a first connection socket 23 matching the number of measuring brackets 1, a second connection socket 24 matching the number of mounting brackets 3, a first connection cavity 21 and a second connection cavity. The first connection cavity 21 and the second connection cavity are independent of each other. One end of the measuring bracket 1 is detachably inserted into the first connection socket 23, and one end of the mounting bracket 3 is detachably arranged on the second connection socket 24. Among them, multiple first ventilation ducts 11 are communicated with the first conveying channel 31 through the first connection cavity 21, and multiple second ventilation ducts 12 are communicated with the second conveying channel 32 through the second connection cavity.

[0039] Specifically, as Figure 8 shown, the first connection cavity 21 is composed of five tubular channels and converges at one place. By setting the first connection cavity 21, the first ventilation duct 11 is communicated with the first conveying channel 31, so as to realize the measurement of the total pressure P1. Optionally, the shape of the first connection cavity 21 is not limited, as long as it communicates the first conveying channel 31 and the first ventilation duct 11.

[0040] Optionally, the first ventilation duct 11 of the measuring bracket 1 can adopt a pipe structure, wherein the pipe structure is adapted to the inner diameter of the first connection cavity 21 for insertion.

[0041] Similarly, the principle of the second connection cavity is the same as that of the first connection cavity 21, and will not be elaborated here.

[0042] In one embodiment, in order to better capture the air volume at the air outlet, and at the same time make the obtained total pressure P1 and static pressure P2 more accurate, and also facilitate the installation of the measuring component, multiple measuring brackets 1 are arranged in the same horizontal plane, and the multiple measuring brackets 1 are evenly spaced. In this embodiment, the number of measuring brackets 1 is 4, and the included angle between two adjacent measuring brackets 1 is 90 degrees. Optionally, the number of measuring brackets 1 can also be 3 or 5 or 6. At this time, the included angle between two adjacent measuring brackets 1 is 120 degrees or 72 degrees or 60 degrees. It can be known that the number of measuring brackets 1 is not limited by the present invention.

[0043] In one embodiment, the plurality of full-pressure pressure holes 111 are evenly spaced and distributed along the length direction of the first ventilation channel 11. Figure 3 As shown, there are multiple full-pressure pressure-taking holes 111, and the multiple full-pressure pressure-taking holes 111 are spaced at the same distance, and the center lines of the multiple full-pressure pressure-taking holes 111 are on the same straight line.

[0044] Furthermore, the number of static pressure holes 121 matches the number of total pressure holes 111, and are correspondingly arranged on the lower end surface of the measuring bracket 1. The distribution principle of the static pressure holes 121 is the same as the distribution principle of the total pressure holes 111, and will not be elaborated here.

[0045] Furthermore, in order to facilitate the replacement of the filter at the air outlet, a damping positioning hinge is provided at one end of the mounting bracket 3, one hinge of the damping positioning hinge is fixedly connected to the mounting bracket, and the other hinge of the damping positioning hinge is fixedly connected to the box body of the air outlet, and fixed by screws. When the measuring bracket 1 is in the measuring position, the elastic force of the damping positioning hinge is used to support and fix the position of the measuring bracket 1. When the filter at the air outlet needs to be replaced, it is only necessary to move the measuring bracket 1 to drive the hinge to move, thereby completing the filter replacement. In this embodiment, the plane where the measuring bracket 1 is located is relatively parallel to the air outlet, and is spaced a certain distance from the air outlet.

[0046] In one embodiment, a measuring module is also included, which is used to measure the total pressure P1 and the static pressure P2. The measuring module is provided with a total pressure air pipe connector and a static pressure air pipe connector, wherein the total pressure air pipe connector is connected to the first delivery channel 31 through the first interface 311, and the static pressure air pipe connector is connected to the second delivery channel 32 through the second interface 321.

[0047] The above is only a preferred embodiment of the present invention. It should be noted that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A high-precision measurement component for outlet wind speed, characterized in that: include: A plurality of measuring brackets distributed at intervals intersect at one point, the plurality of measuring brackets are provided with two mutually independent first ventilation passages and second ventilation passages, the first ventilation passages on the plurality of measuring brackets are connected, and the second ventilation passages on the plurality of measuring brackets are connected; A plurality of full-pressure taking holes are arranged on one side of the measuring bracket, and the full-pressure taking holes are communicated with the first ventilation duct; A plurality of static pressure taking holes are arranged on the other side of the measuring bracket, the static pressure taking holes are connected with the second ventilation duct, and the axis of the static pressure taking holes is parallel to the axis of the total pressure taking holes; The mounting bracket has one end connected to the intersection of the measuring brackets, and the mounting bracket is provided with a first conveying channel and a second conveying channel. One end of the first conveying channel is connected to the plurality of the first ventilation ducts, and the second conveying channel is connected to the plurality of second channels.

2. A high-precision measurement assembly for outlet wind speed according to claim 1, characterized in that: It also includes a fixing piece, which is arranged at the intersection of a plurality of the measuring brackets, and the measuring bracket is detachably arranged on the fixing piece.

3. A high-precision measurement assembly for outlet wind speed according to claim 2, characterized in that: The fixing member is provided with a first connecting socket matching the number of the measuring brackets, a second connecting socket matching the number of the mounting brackets, a first connecting cavity and a second connecting cavity, the first connecting cavity and the second connecting cavity are independent of each other, one end of the measuring bracket is detachably plugged into the first connecting socket, and one end of the mounting bracket is detachably arranged in the second connecting socket, wherein a plurality of the first ventilation ducts are connected to the first conveying channel through the first connecting cavity, and a plurality of the second ventilation ducts are connected to the second conveying channel through the second connecting cavity.

4. The high-precision measurement component for outlet wind speed according to claim 1, characterized in that: The plurality of measuring brackets are arranged in the same horizontal plane, and the plurality of measuring brackets are evenly spaced and distributed.

5. The high-precision measurement component for outlet wind speed according to claim 1, characterized in that: The plurality of full-pressure taking holes are evenly distributed at intervals along the length direction of the first ventilation duct.

6. A high-precision measurement assembly for outlet wind speed according to claim 5, characterized in that: The plurality of static pressure taking holes are evenly spaced and distributed along the length direction of the second ventilation duct, wherein the static pressure taking holes are the same in number and have corresponding positions as the total pressure taking holes.

7. The high-precision measurement assembly for outlet wind speed according to claim 2, characterized in that: A damping positioning hinge is provided at one end of the mounting bracket away from the fixing member, and the damping positioning hinge is used for rotational mounting of the mounting bracket.

8. The high-precision measurement assembly for outlet wind speed according to claim 1, characterized in that: It also includes a measuring module, which is provided with a full-pressure air pipe joint and a static-pressure air pipe joint, wherein the full-pressure air pipe joint is connected to the first delivery channel, and the static-pressure air pipe joint is connected to the second delivery channel.

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