CN220649979U - Wind tunnel device for detecting wind-shielding performance of hood - Google Patents
Wind tunnel device for detecting wind-shielding performance of hood Download PDFInfo
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- CN220649979U CN220649979U CN202322048960.2U CN202322048960U CN220649979U CN 220649979 U CN220649979 U CN 220649979U CN 202322048960 U CN202322048960 U CN 202322048960U CN 220649979 U CN220649979 U CN 220649979U
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- 230000003068 static effect Effects 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 description 9
- 239000012080 ambient air Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model discloses a wind tunnel device for detecting wind shielding performance of a wind cap, which comprises a wind tunnel, a test section and a test bench arranged on the test section, wherein the test section is a part of the wind tunnel with a wind field with set wind speed, the test bench is a buffer container with a first opening with a set shape, the first opening is used for being matched and connected with an air inlet of the wind cap when the wind cap is detected, so that the wind cap is positioned in the wind field, an internal wind channel of the wind cap is in fluid communication with the buffer container, and a pressure measuring device for measuring the static pressure of gas in the buffer container is arranged on the buffer container. The utility model can conveniently, comprehensively and accurately measure the wind-shielding performance of the hood.
Description
Technical Field
The utility model relates to the field of wind-shielding performance detection, in particular to a wind tunnel device for detecting the wind-shielding performance of a hood.
Background
In a house or a commercial building, an exhaust passage for exhausting indoor smoke or foul air to the outside is generally provided. The hood arranged at the outlet of the exhaust passage should be capable of effectively preventing strong wind, rain and snow and the like from flowing back from the exhaust passage into the room, i.e. should have good wind-shielding performance. However, there is still a lack of devices in the prior art that can accurately detect or evaluate the wind-shielding performance of a hood.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a wind tunnel device for detecting the wind shielding performance of a hood. Specifically, the present utility model provides the following technical solutions.
In one aspect, the utility model provides a wind tunnel device for detecting wind shielding performance of a wind cap, which comprises a wind tunnel, a test section and a test bench arranged on the test section, wherein the test section is a part of the wind tunnel with a wind field with set wind speed, the test bench is a buffer container with a first opening with a set shape, the first opening is used for being matched and connected with an air inlet of the wind cap when the wind cap is detected, so that the wind cap is positioned in the wind field, an internal air channel of the wind cap is in fluid communication with the buffer container, and a pressure measuring device for measuring the static pressure of air in the buffer container is arranged on the buffer container.
Further, the side wall of the wind tunnel at the test section is open or closed.
Further, at least one side wall of the wind tunnel at the test section is provided with an openable window sash so that the wind tunnel at the test section can be switched between an open state and a closed state.
Further, at the test section, the wind tunnel is provided with a rectangular cross section, the test bench is arranged on the lower side wall of the wind tunnel, and the window sashes are arranged on the left side wall and the right side wall of the wind tunnel.
Further, the wind tunnel is a positive pressure wind tunnel with adjustable wind speed, and the pressure of the wind field is greater than the ambient pressure outside the wind tunnel.
Further, the wind tunnel is provided with a wind volume detection device or a wind speed detection device for measuring the wind volume or the wind speed in the wind tunnel.
Further, in the wind tunnel, a rectifier for stabilizing the wind field at the test section is provided upstream and/or downstream of the test section.
Further, at the test section, a second opening is provided on a side wall of the wind tunnel, and the test bench rotatably penetrates through and is connected to the second opening so that the wind cap is in the wind field and at least part of the buffer container is outside the wind tunnel when the wind cap is detected.
Further, the second opening is a circular opening, a guide ring surrounding the second opening is arranged on the inner side of the side wall of the wind tunnel, a rotary table surrounding the first opening is arranged at the first opening of the test bench, when the hood is detected, the hood is fixed on the rotary table, and the rotary table is rotatably matched with the guide ring.
Further, a pointer is arranged on one of the surface of the rotary table and the inner side surface of the side wall of the wind tunnel adjacent to the rotary table, and scales matched with the pointer are arranged on the other surface of the rotary table and are used for indicating the position of the rotary table where the wind cap is located after the rotary table rotates when the wind cap is detected.
According to the wind tunnel device for detecting the wind-shielding performance of the wind cap, wind speeds of various wind levels can be conveniently simulated by using the wind tunnel, different environments where the wind cap is located can be simulated by opening and closing window sashes of a test section, and wind of different wind directions experienced by the wind cap can be simulated by rotating a test bench, so that the wind-shielding performance of the wind cap can be conveniently, comprehensively and accurately measured.
In the description of the present utility model, "substantially" does not exclude the meaning of "complete". Such as a component "substantially free" of Y, or may be completely free of Y. "substantially" may be eliminated from the definition of the utility model, if desired. "comprising" includes both the mentioned factors and allows for the inclusion of additional, uncertain factors. "about", "about" and "about" in the case of the concentration system of each component are +/-5%, +/-4%, +/-3%, +/-2%, +/-1%, +/-0.5% of the index value. "and/or" means that the plurality of terms connected thereby may each be used alone or in any combination with one another.
In the present utility model, examples are generally illustrated by a certain range, but are merely for conciseness and clarity of explanation and are not limiting. The described ranges include subranges as well as all individual values within the range. For example, a range of 1 to 6 includes subranges such as 1 to 3, 1 to 4, 1 to 5, 2 to 4, 2 to 6, 3 to 6, and the like, as well as individual values within the range such as 1, 2, 3, 4, 5, 6.
In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
Drawings
FIG. 1 is a schematic perspective view of a wind tunnel device for detecting wind shielding performance of a hood according to an embodiment of the present utility model, wherein a window sash is in an open state;
FIG. 2 is a schematic structural view of the wind tunnel device shown in FIG. 1 when detecting a hood;
FIG. 3 is a schematic perspective view of a test section of the wind tunnel device of FIG. 1, wherein the test stand is not installed and the window sash is in an open state;
FIG. 4 is a schematic perspective view of a test section of the wind tunnel device of FIG. 1, wherein the test stand is installed and the window sash is in an open state;
FIG. 5 is a schematic perspective view of a test bench of the wind tunnel device shown in FIG. 1;
FIG. 6 is a schematic perspective view of another test bench of the wind tunnel device shown in FIG. 1;
in the figure: 11-an air inlet; 12-a fan; 2-wind tunnel; 21-an upstream rectifying section; 22-a downstream rectifying section; 3-a test section; 31-window sashes; 32-a second opening; 33-guide ring; 34-pointer; 4-a test bench; 41-a buffer container; 42-first test well; 43-a turntable; 44-scale; 45-a first opening; 5-a bracket; 51-adjusting buttons; 61-a second test well; 62-third test well; 7-hood.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-6, an aspect of the present utility model provides a wind tunnel device for detecting wind-shielding performance of a wind cap, comprising a wind tunnel 2, a test section 3 and a test bench 4 provided on the test section 3, wherein the test section 3 is a part of the wind tunnel 2 having a wind field with a set wind speed, the test bench 4 is a buffer container 41 having a first opening 45 with a set shape, the first opening 45 is used for matching and connecting with an air inlet of the wind cap 7 when detecting the wind cap 7, so that the wind cap 7 is in the wind field and an internal wind channel of the wind cap 7 is in fluid communication with the buffer container 41, and a pressure measuring device 42 for measuring a gas static pressure in the buffer container 41 is provided on the buffer container 41. Preferably, the wind turbine 12 is a wind turbine driven by a variable frequency motor to vary the wind turbine speed, and thus the wind speed, at the wind farm by frequency conversion. The wind speed at the wind field can be the wind speed corresponding to each wind level specified by the national standard of wind power grade.
In some cases, the side walls of the wind tunnel at the test section 3 are open or closed. For example, at least one side wall of the wind tunnel at the test section 3 is provided with an openable window 31 so that the wind tunnel at the test section can be switched between an open state and a closed state. In some cases, at the test section 3, the wind tunnel has a rectangular cross section, the test stand 4 is provided at the lower side wall of the wind tunnel, and the window sashes 31 are provided on both the left and right side walls of the wind tunnel.
In some cases, the wind tunnel 4 is a positive pressure wind tunnel with adjustable wind speed, and the pressure of the wind field is greater than the ambient pressure outside the wind tunnel. In this case the fan 12 introduces ambient air into the wind tunnel 2 to form the wind field.
In some cases, the wind tunnel 2 is provided with a wind volume detection device or a wind speed detection device for measuring the wind volume or the wind speed in the wind tunnel. For example, the wind speed or the wind volume may be measured by installing the wind volume detecting device or the wind speed detecting device through the first test hole 61 at the upstream of the blower 12 or the second test hole 62 between the blower 12 and the test section 3. The wind volume detection device can be a device for determining the wind volume or the wind speed by measuring the static pressure difference between a wind field and the outside, and the wind speed detection device can be a device capable of directly measuring the wind speed, such as an anemometer, in the prior art. Preferably, there may be a plurality of each of the first test holes 61 and the second test holes 62, so that the corresponding air volume or air velocity may be an average value of the multi-point test data. Preferably, the wind speed can be calculated by the cross-sectional area of the wind volume and the corresponding wind passing through.
In some cases, in the wind tunnel, rectifiers for stabilizing the wind field at the test section may be provided upstream and downstream of the test section 3, respectively, such as an upstream rectifying section 21 and a downstream rectifying section 22, each of which may be any suitable rectifier known in the art, such as a honeycomb rectifier.
In some cases, at the test section 3, a second opening 32 is provided in the side wall of the wind tunnel, the test bench 4 being rotatably passed through and connected to the second opening 32 such that the wind cap 7 is in the wind field and at least part of the buffer container 41 is outside the wind tunnel 2 when the wind cap 7 is detected. For example, the second opening 32 may be a circular opening and a guide ring 33 surrounding the second opening 32 is provided on the inner side of the side wall of the wind tunnel, a turntable 43 surrounding the first opening 45 is provided at the first opening 45 of the test stand 4, the wind cap 7 may be fixed on the turntable 43 when the wind cap 7 is detected, and the turntable 43 is rotatably engaged with the guide ring 33.
In some cases, the surface of the turntable 43 is provided with scales 44, and the inner side surface of the side wall of the wind tunnel adjacent to the turntable 43 is provided with a pointer 34 for indicating the position of the hood 7 after the turntable 44 rotates when detecting the hood 7.
When the wind-shielding performance of the hood 7 is detected, the corresponding test bench 4 can be selected according to the shape and the size of the inlet of the air inlet channel of the hood 7. For example, for a hood 7 having a circular inlet shape and a set diameter, a test bench 4 having a circular first opening 45 and the same diameter as shown in fig. 6 may be selected; for the hood 7 having a rectangular inlet shape and a set size, the test bench 4 having a rectangular first opening 45 as shown in fig. 5 and the same size may be selected. The hood 7 is fastened to the turntable 43 of the test stand 4, wherein gaps between the hood 7 and the turntable 43 that allow ventilation are to be avoided. The test bench 4 is then placed in the second opening 32 of the test section 3 such that the turntable 43 cooperates with the guide ring 33 and, if necessary, the turntable 43 is turned in the guide ring 33, the hood 7 being adjusted to the set position according to the graduations 44 corresponding to the pointer 34. The fan 12 is then turned on and adjusted to control the wind field at the test section 3 at the set wind speed. The relative static pressure of the buffer container 41 in fluid communication with the hood 7 with respect to the ambient atmospheric pressure is measured through the first test hole 42 on the buffer container 41, and the wind-shielding performance of the hood 7 is evaluated based on the measured relative static pressure. In general, the higher the measured relative static pressure, the poorer the wind-shielding performance of the hood. If the hood can measure lower relative static pressure at higher wind speed, the hood has better wind-shielding performance. When the measured relative static pressure is negative, the hood may be referred to as a negative pressure hood, which has excellent wind-shielding performance.
According to the wind tunnel device for detecting the wind-shielding performance of the wind cap, wind speeds of various wind levels can be conveniently simulated by using the wind tunnel, different environments where the wind cap is located can be simulated by opening and closing the window sashes of the test section 3, and wind of different wind directions experienced by the wind cap can be simulated by rotating the test bench, so that the wind-shielding performance of the wind cap can be conveniently, comprehensively and accurately measured.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a wind tunnel device for detecting hood wind-shielding performance, its characterized in that includes wind tunnel, test section and locates the testboard of test section, the test section is the part of the wind field that has the settlement wind speed in the wind tunnel, the testboard is the buffer vessel that has the first open-ended of settlement shape, first opening is used for when detecting the hood matches and is connected with the air intake of hood so that the hood is in the wind field and the inside wind channel and the buffer vessel fluid communication of hood, be equipped with the pressure measuring device that is used for measuring the interior gas static pressure of buffer vessel on the buffer vessel.
2. Wind tunnel device according to claim 1, wherein the side walls of the wind tunnel at the test section are open or closed.
3. Wind tunnel device according to claim 2, wherein at least one side wall of the wind tunnel at the test section is provided with openable and closable window sashes enabling the wind tunnel at the test section to be switched between an open state and a closed state.
4. A wind tunnel device according to claim 3, wherein at the test section the wind tunnel has a rectangular cross section, the test bench is provided at a lower side wall of the wind tunnel, and the window sashes are provided on both left and right side walls of the wind tunnel.
5. The wind tunnel device of claim 1, wherein the wind tunnel is a positive pressure wind tunnel with adjustable wind speed.
6. Wind tunnel device according to claim 1, characterized in that the wind tunnel is provided with a wind volume detection device or a wind speed detection device for measuring the wind volume or the wind speed in the wind tunnel.
7. Wind tunnel device according to claim 1, wherein a rectifier for stabilizing the wind field at the test section is provided in the wind tunnel upstream and/or downstream of the test section.
8. Wind tunnel device according to any of claims 1-7, wherein at the test section a second opening is provided in the side wall of the wind tunnel, the test bench being rotatably passed through and connected to the second opening such that the wind cap is in the wind field and at least part of the buffer container is outside the wind tunnel when the wind cap is tested.
9. The wind tunnel device according to claim 8, wherein the second opening is a circular opening and a guide ring surrounding the second opening is arranged on the inner side of the side wall of the wind tunnel, a rotary disk surrounding the first opening is arranged at the first opening of the test bench, the wind cap is fixed on the rotary disk during wind cap detection, and the rotary disk is rotatably matched with the guide ring.
10. The wind tunnel device according to claim 9, wherein one of the surface of the turntable and the inner side surface of the side wall of the wind tunnel adjacent to the turntable is provided with a pointer, and the other is provided with a scale matched with the pointer for indicating the position of the hood after the turntable rotates when the hood is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322048960.2U CN220649979U (en) | 2023-08-01 | 2023-08-01 | Wind tunnel device for detecting wind-shielding performance of hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322048960.2U CN220649979U (en) | 2023-08-01 | 2023-08-01 | Wind tunnel device for detecting wind-shielding performance of hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220649979U true CN220649979U (en) | 2024-03-22 |
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ID=90265995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322048960.2U Active CN220649979U (en) | 2023-08-01 | 2023-08-01 | Wind tunnel device for detecting wind-shielding performance of hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220649979U (en) |
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2023
- 2023-08-01 CN CN202322048960.2U patent/CN220649979U/en active Active
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