CN219910837U - Tunnel wind speed control device suitable for model test - Google Patents
Tunnel wind speed control device suitable for model test Download PDFInfo
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- CN219910837U CN219910837U CN202321128866.1U CN202321128866U CN219910837U CN 219910837 U CN219910837 U CN 219910837U CN 202321128866 U CN202321128866 U CN 202321128866U CN 219910837 U CN219910837 U CN 219910837U
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- 239000002131 composite material Substances 0.000 claims abstract description 21
- 238000009423 ventilation Methods 0.000 abstract description 7
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004379 similarity theory Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The utility model relates to a tunnel wind speed control device suitable for model test. The tunnel model test ventilation requirement problem that current fan is difficult to satisfy multiple scale proportion, multiple test operating mode is solved. The technical scheme adopted by the utility model comprises an air flow collecting cylinder, a variable cross-section accelerating channel and a compound decelerating air outlet cylinder which are spliced into a whole in sequence; the wind flow collecting cylinder is connected with the fan, and the variable cross section accelerating channel is arranged at the tail part of the wind flow collecting cylinder and is connected with the front end of the composite deceleration wind outlet cylinder; the composite deceleration air outlet cylinder comprises a first air outlet cylinder, a second air outlet cylinder and a third air outlet cylinder which are sequentially connected and have the same diameter, the first air outlet cylinder and the second air outlet cylinder are connected through an exhaust net, and a detachable wind shielding net is arranged between the second air outlet cylinder and the third air outlet cylinder; holes matched with two circles of holes of an exhaust net are respectively arranged at the tail part of the first air outlet cylinder and the front end of the second air outlet cylinder, and the shrinkage and coincidence of the holes are realized by rotating the exhaust net.
Description
Technical field:
the utility model belongs to the technical field of tunnel model tests, and particularly relates to a tunnel wind speed control device suitable for a model test.
The background technology is as follows:
in the model test procedure involving tunnel ventilation, the dimensions of the tunnel model are reduced compared to the dimensions of the tunnel prototype, the so-called scale test. The scale ratio selected by the scale model is also different due to the influence of various factors such as different sizes of tunnel prototypes, different test key study objects, large laboratory condition difference and the like. Considering that wind flow is affected by gravity and buoyancy, the Froude number Fr (ratio of inertial force to gravity) is often used as the basis of a design model in a tunnel model test related to ventilation, and wind speed in the model test is required to be reduced according to a geometric similarity coefficient according to a similarity theory. However, the existing fans have fewer gears and limited power adjustment range, so that the requirements of tunnel ventilation model tests with various scale ratios and various test conditions are difficult to meet, and the requirements of tests with lower wind speed and smaller change range are especially difficult to meet.
Therefore, in the model test process related to tunnel ventilation, the wind speed provided by the fan needs to be further adjusted according to different scale ratios and test working conditions so as to meet test requirements, and no effective measures are available at present for reducing and controlling the tunnel wind speed in the model test.
The utility model comprises the following steps:
in view of the above, the utility model provides a tunnel wind speed control device suitable for model test in order to solve the problem that the conventional fan is difficult to meet the ventilation requirements of tunnel model test with various scale ratios and various test conditions.
In order to solve the problems, the utility model adopts the following technical scheme: the tunnel wind speed control device suitable for the model test is characterized by comprising a wind flow collecting cylinder, a variable cross-section accelerating channel and a composite deceleration wind outlet cylinder which are spliced into a whole in sequence;
the wind flow collecting cylinder is connected with the fan through a groove, and the variable cross section accelerating channel is arranged at the tail part of the wind flow collecting cylinder and is connected with the front end of the composite deceleration wind outlet cylinder;
the composite deceleration air outlet cylinder comprises a first air outlet cylinder, a second air outlet cylinder and a third air outlet cylinder which are sequentially connected and have the same diameter, the first air outlet cylinder and the second air outlet cylinder are connected through an exhaust net, and a detachable wind shielding net is arranged between the second air outlet cylinder and the third air outlet cylinder; the structure of the exhaust net is in a ring shape, a circle of connecting lugs are integrally arranged in the center of the circumference of the ring shape, and a circle of holes are uniformly distributed on the rings on two sides of the connecting lugs;
holes matched with two circles of holes of an exhaust net are respectively formed in the tail part circle of the first air outlet barrel and the front end circle of the second air outlet barrel, and the holes are reduced and overlapped by rotating the exhaust net.
Further, the detachable wind screen consists of two identical first wind screen pieces and second wind screen pieces, and a plurality of small round holes are respectively formed in the detachable wind screen pieces.
Further, the tail diameter of the wind flow collecting cylinder is the same as the front end diameter of the variable-section accelerating channel, and the tail diameter of the variable-section accelerating channel is the same as the diameter of the composite deceleration wind outlet cylinder.
Further, the wind current collecting cylinder is a T-shaped cylinder.
Further, the variable cross-section accelerating channel is a tapered cylinder.
Compared with the prior art, the utility model has the following advantages:
1) The utility model can flexibly adjust the wind speed of the air outlet, is not influenced by the power of the fan and the adjustment amplitude of gears, can effectively reduce the wind speed in the device, meets the tunnel ventilation requirements of various scale ratios and various test conditions, and is particularly suitable for multi-condition model tests requiring small changes of the wind speed.
2) The structure of the utility model is provided with the variable cross-section accelerating channel which is convenient to detach, and the wind flow can be accelerated through the variable cross-section accelerating channel in advance before the wind speed is reduced, if the composite deceleration wind outlet barrel is detached, the function of increasing the wind speed of the wind outlet can be realized, the wind speed is controllable, the purpose of flexibly controlling the wind speed is achieved, and the utility model has rich application scenes.
3) The utility model is formed by assembling a plurality of components, the sizes of the component components can be flexibly adjusted according to the requirements, the utility model can be suitable for fans and tunnel models with various sizes, specifications and powers, and the utility model is easy to check and replace when damage occurs.
4) The utility model is not affected by indoor and outdoor humid environment, repeated change of air temperature and the like, has good adaptability, and can be detached at any time and reused.
5) The utility model has simple structure, low processing and using cost and easy popularization.
Drawings
FIG. 1 is an overall assembly schematic diagram of a tunnel wind speed control device;
FIG. 2 is a schematic view of a wind flow collector;
FIG. 3 is a schematic view of a compound deceleration air outlet duct;
FIG. 4 is a schematic view of an exhaust network;
fig. 5 is a schematic view of a removable wind screen.
Marking: 1-an air flow collecting cylinder, 2-a variable cross section accelerating channel, 3-a composite deceleration air outlet cylinder, 4-an air exhaust net, 5-a detachable wind shielding net and 6-grooves;
3-1-first air outlet cylinder, 3-2-second air outlet cylinder and 3-3-third air outlet cylinder;
4-1-holes and 4-2-connecting lugs;
5-1-first wind shielding net piece and 5-2-second wind shielding net piece.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The embodiment provides a tunnel wind speed control device suitable for model test, which comprises a wind flow collection cylinder 1, a variable cross-section accelerating channel 2 and a composite deceleration wind outlet cylinder 3 which are spliced into a whole in sequence; the tail diameter of the wind flow collecting cylinder 1 is the same as the front end diameter of the variable-section accelerating channel 2, and the tail diameter of the variable-section accelerating channel 2 is the same as the diameter of the composite deceleration wind outlet cylinder 3; the wind flow collecting cylinder 1 is tightly connected with the fan through a groove 6 and can guide wind flow into the variable cross section accelerating channel 2, and the variable cross section accelerating channel 2 is arranged at the tail part of the wind flow collecting cylinder 1 and is connected with the front end of the composite deceleration wind outlet cylinder 3; as shown in fig. 1, a tunnel wind speed control device is connected to the fan and the tunnel model port.
The composite deceleration air outlet cylinder 3 comprises a first air outlet cylinder 3-1, a second air outlet cylinder 3-2 and a third air outlet cylinder 3-3 which are sequentially connected and have the same diameter, wherein the first air outlet cylinder 3-1 and the second air outlet cylinder 3-2 are connected through an exhaust net 4, and a detachable wind shielding net 5 is arranged between the second air outlet cylinder 3-2 and the third air outlet cylinder 3-3; the structure of the exhaust net 4 is in a ring shape, a circle of connecting lugs 4-2 are integrally arranged in the center of the circumference of the ring shape, and a circle of holes 4-1 are uniformly distributed on the rings on two sides of the connecting lugs 4-2; holes matched with two circles of holes 4-1 of the exhaust net 4 are respectively formed in the tail part circle of the first air outlet barrel 3-1 and the front end circle of the second air outlet barrel 3-2, as shown in fig. 4, the positions of the exhaust net 4 are rotated through the connecting lugs 4-2, the size of an air outlet is changed, the air outlet quantity of the air outlet is adjusted, and the air flow rate blown to the air outlet is changed. The detachable wind shielding net 5 consists of two identical first wind shielding net pieces 5-1 and second wind shielding net pieces 5-2, and a plurality of small round holes are respectively formed in the two wind shielding net pieces, as shown in fig. 5, the positions of holes in the two wind shielding net pieces can be adjusted through rotation, the positions of the holes in the two wind shielding net pieces can be adjusted through rotation, the sizes of the holes in the wind shielding net pieces can be further adjusted, and the wind flow and the wind speed blown to the wind outlet can be adjusted.
The wind current collecting cylinder 1 is a T-shaped cylinder.
The variable cross-section accelerating channel 2 is a conical cylinder, and larger wind speed can be introduced into the composite deceleration wind outlet barrel 3 by changing the size of the cross section of the pipeline, and when wind flow enters the variable cross-section accelerating channel, the initial wind speed of the wind outlet can be increased due to the fact that the cross section of the wind outlet is reduced.
The composite deceleration wind outlet cylinder 3 is formed by splicing an exhaust net, a detachable wind shielding net and a 3-section wind outlet cylinder, and can realize the function of reducing wind speeds in different degrees, and finally, the required wind speed is introduced into a tunnel model.
The wind speed control device flexibly adjusts the wind speed of the air outlet according to the wind speed of the air inlet by utilizing the variable-section accelerating channel and the composite decelerating air outlet cylinder, so that the wind speed in the tunnel model meets the requirements of the wind speed of various scale model tests.
The specific implementation process comprises the following steps:
1) According to the tunnel model and the size of the fan, the wind flow collecting cylinder 1 and the third wind outlet cylinder 3-3 are processed, and the processed materials can be selected from iron sheets, concrete, plastics, stainless steel and the like, and are processed into corresponding shapes and connected to the ports of the fan and the tunnel model.
2) According to the size of the third air outlet barrel 3-3, the first air outlet barrel 3-1 with holes and the second air outlet barrel 3-2 are manufactured and spliced into the compound deceleration air outlet barrel 3 shown in figure 3.
3) According to the determined sizes of the wind flow collecting cylinder 1 and the composite deceleration wind outlet cylinder 3, a variable-section accelerating channel 2 for connecting the wind flow collecting cylinder 1 and the composite deceleration wind outlet cylinder is manufactured, and the length of the variable-section accelerating channel 2 is as short as possible in consideration of the side wall friction resistance of different materials.
4) And manufacturing an exhaust net 4 and a detachable wind shielding net 5 according to the sizes and the hole positions of the first air outlet cylinder 3-1 and the second air outlet cylinder 3-2 with holes.
5) All the components are spliced to form the tunnel wind speed control device shown in fig. 1 and are connected to a fan.
6) And selecting a similar fan gear according to the wind speed required by the test, and measuring the wind speed of the air outlet under the conditions of closing the air exhaust net and not placing the wind shielding net after the fan is started.
7) The welding connection lug 4-2 in the middle of the rotary exhaust net 4 is used for adjusting the position of the hole 4-1 on the exhaust net, changing the size of the exhaust outlet, further adjusting the air outlet quantity of the exhaust outlet and changing the air flow and the air speed of the air blown to the air outlet.
8) If the wind speed is still too high in the case of implementing the above-mentioned implementing process 7), the first wind shielding net piece 5-1 and the second wind shielding net piece 5-2 are added under the condition that the wind speed requirement required by the test cannot be met, the positions of holes in the two wind shielding net pieces are adjusted in a rotating mode, then the sizes of holes in the wind shielding net pieces are adjusted, and the wind flow and the wind speed blown to the air outlet are further adjusted.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model.
Claims (5)
1. The tunnel wind speed control device suitable for the model test is characterized by comprising a wind flow collection cylinder (1), a variable-section accelerating channel (2) and a composite deceleration wind outlet cylinder (3) which are spliced into a whole in sequence;
the wind flow collecting cylinder (1) is connected with the fan through a groove (6), and the variable cross section accelerating channel (2) is arranged at the tail part of the wind flow collecting cylinder (1) and is connected with the front end of the composite deceleration wind outlet cylinder (3);
the composite deceleration air outlet cylinder (3) comprises a first air outlet cylinder (3-1), a second air outlet cylinder (3-2) and a third air outlet cylinder (3-3) which are sequentially connected and have the same diameter, wherein the first air outlet cylinder (3-1) and the second air outlet cylinder (3-2) are connected through an exhaust net (4), and a detachable wind shielding net (5) is arranged between the second air outlet cylinder (3-2) and the third air outlet cylinder (3-3); the structure of the exhaust net (4) is in a ring shape, a circle of connecting lugs (4-2) are integrally arranged in the center of the circumference of the ring shape, and a circle of holes (4-1) are uniformly distributed on the rings on two sides of the connecting lugs (4-2);
holes matched with two circles of holes (4-1) of an exhaust net (4) are respectively formed in one circle of the tail part of the first air outlet barrel (3-1) and one circle of the front end of the second air outlet barrel (3-2), and the shrinkage and superposition of the holes are realized by rotating the exhaust net (4).
2. The tunnel wind speed control device suitable for model test according to claim 1, wherein the detachable wind shielding net (5) is composed of two identical first wind shielding net pieces (5-1) and second wind shielding net pieces (5-2), and a plurality of small round holes are respectively arranged on the two identical first wind shielding net pieces and the second wind shielding net pieces.
3. The tunnel wind speed control device suitable for model test according to claim 1 or 2, wherein the tail diameter of the wind flow collecting cylinder (1) is the same as the front end diameter of the variable-section accelerating channel (2), and the tail diameter of the variable-section accelerating channel (2) is the same as the diameter of the composite deceleration wind outlet cylinder (3).
4. A tunnel wind speed control device suitable for model test according to claim 3, characterized in that the wind flow collecting cylinder (1) is a T-shaped cylinder.
5. The tunnel wind speed control device suitable for model test according to claim 4, wherein the variable cross-section accelerating channel (2) is a conical cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321128866.1U CN219910837U (en) | 2023-05-11 | 2023-05-11 | Tunnel wind speed control device suitable for model test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321128866.1U CN219910837U (en) | 2023-05-11 | 2023-05-11 | Tunnel wind speed control device suitable for model test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219910837U true CN219910837U (en) | 2023-10-27 |
Family
ID=88432949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321128866.1U Active CN219910837U (en) | 2023-05-11 | 2023-05-11 | Tunnel wind speed control device suitable for model test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219910837U (en) |
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2023
- 2023-05-11 CN CN202321128866.1U patent/CN219910837U/en active Active
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