CN210484194U - Special butterfly door for air outlet of negative pressure fan - Google Patents
Special butterfly door for air outlet of negative pressure fan Download PDFInfo
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- CN210484194U CN210484194U CN201921157631.9U CN201921157631U CN210484194U CN 210484194 U CN210484194 U CN 210484194U CN 201921157631 U CN201921157631 U CN 201921157631U CN 210484194 U CN210484194 U CN 210484194U
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Abstract
The utility model relates to a fan technical field, in particular to special butterfly door of negative-pressure air fan air outlet, including the fan shell, the fan shell is equipped with circular air outlet, an annular frame is connected to air outlet department, link firmly a central pole setting in the middle of the annular frame, central pole setting bilateral symmetry articulates there is two semicircle form butterfly door plants, each butterfly door plant middle part transverse connection extension spring. The utility model can ensure the ventilation volume of the fan to the maximum extent and improve the efficiency of the fan when the butterfly door is opened; the butterfly valve closes the state and furthest separation air backward flow, plays certain heat preservation effect winter.
Description
Technical Field
The utility model relates to a fan technical field, in particular to special butterfly door of negative-pressure air fan air outlet.
Background
The fan is a machine which can increase the gas pressure and discharge the gas by means of the input mechanical energy, and is widely used for ventilation, dust exhaust and temperature reduction of breeding houses, factories, mines, tunnels and buildings; because livestock, personnel and equipment are more in livestock and poultry houses, plants or large buildings, a plurality of fans are required to be arranged on the outer wall for indoor ventilation, shutters are generally arranged at the air inlets of the fans, and the shutters are automatically closed after the fans are closed, so that rain and snow are prevented from entering the room.
However, the air inlet of the fan is connected with the louver, and the defects that ① louvers are arranged at the position of the air inlet, the number of supporting frames is large, air flow is disturbed, wind resistance is formed, ② louver assemblies are large, the number of fit clearance gaps is large, the heat preservation effect is poor, and ③ louver assemblies have large friction with air, so that noise pollution is caused.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes not enough among the prior art provides a special butterfly door of negative-pressure air fan air outlet.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model provides a special butterfly door of negative-pressure air fan air outlet, includes the fan shell, the fan shell is equipped with circular air outlet, air outlet department connects an annular frame, link firmly a central pole setting in the middle of the annular frame, central pole setting bilateral symmetry articulates there is two semicircle form butterfly door boards, each butterfly door board middle part transverse connection extension spring.
Preferably, the butterfly door panel is made of PE material.
Compared with the prior art, the beneficial effects of the utility model are that: 1. the effect is good: the air blocking image in the air flow channel of the fan is reduced as much as possible under the condition that the special butterfly-shaped door for the fan is opened, and the efficiency of the fan is ensured to the maximum extent; 2. the quality is good: the special butterfly door for the fan is made of PE plastic, so that the special butterfly door is light in weight, excellent in quality and corrosion-resistant; 3. is very simple and convenient: the special butterfly door for the fan is easy to install, less in maintenance and convenient to operate, and does not need maintenance of professional personnel; 4. ultra-environment protection: the special butterfly door for the fan is pollution-free, low in noise, free of damage to the environment and low in carbon; 5. low noise: the special butterfly door for the fan is parallel to the flow direction of wind in the opening state, so that the wind resistance can be reduced to the minimum, and the possibility of generating noise is reduced to the minimum.
Drawings
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
fig. 1 is a schematic perspective view of the present invention;
in the figure: 1 fan shell, 2 air outlets, 3 annular frames, 4 central vertical rods, 5 butterfly-shaped door plates and 6 tension springs.
Detailed Description
The attached drawings are specific embodiments of the invention. As shown in fig. 1, a special butterfly door for an air outlet of a negative pressure fan comprises a fan shell 1, wherein the fan shell 1 is provided with a circular air outlet 2, the air outlet 2 is connected with an annular frame 3, a central upright rod 4 is fixedly connected in the middle of the annular frame 3, two semicircular butterfly door panels 5 are symmetrically hinged to the central upright rod 4 in a bilateral mode, the butterfly door panels 5 are made of PE materials, and the middle of each butterfly door panel 5 is transversely connected with a tension spring 6.
The special butterfly door for the air outlet of the negative pressure fan is matched with the negative pressure fan, the butterfly door is light and thin in material, when the fan works, the butterfly door is blown open under the action of wind force, the two butterfly door plates 5 are attached together, and only the longitudinal space at the central upright rod 4 at the air inlet is an obstacle, so that the ventilation quantity of the fan is ensured to the maximum extent, the efficiency of the fan is improved, and the waste of mechanical energy is reduced; the butterfly door is closed and is blocked the air backward flow to the utmost extent under the state, plays certain heat preservation effect winter, and when negative-pressure air fan stop operation, under the effect of extension spring 6, the butterfly door self-closing.
The utility model discloses technical characteristics that have not described can be through or adopt prior art to realize, no longer describe here, and of course, above-mentioned embodiment is not right the utility model discloses a restriction, the utility model discloses also not only be limited to above-mentioned embodiment, ordinary skilled person in this technical field is in the utility model discloses a change, modification, interpolation or replacement made in the essential scope also should fall into the utility model discloses a protection scope.
Claims (2)
1. The utility model provides a special butterfly door of negative-pressure air fan air outlet, includes fan shell (1), its characterized in that, fan shell (1) is equipped with circular air outlet (2), an annular frame (3) is located to be connected in air outlet (2), link firmly a central pole setting (4) in the middle of annular frame (3), central pole setting (4) bilateral symmetry articulates there are two semicircles form butterfly door plant (5), each butterfly door plant (5) middle part transverse connection extension spring (6).
2. The special butterfly door for the air outlet of the negative pressure fan as claimed in claim 1, wherein: the butterfly door panel (5) is made of PE material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921157631.9U CN210484194U (en) | 2019-07-23 | 2019-07-23 | Special butterfly door for air outlet of negative pressure fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921157631.9U CN210484194U (en) | 2019-07-23 | 2019-07-23 | Special butterfly door for air outlet of negative pressure fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210484194U true CN210484194U (en) | 2020-05-08 |
Family
ID=70532105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921157631.9U Active CN210484194U (en) | 2019-07-23 | 2019-07-23 | Special butterfly door for air outlet of negative pressure fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210484194U (en) |
-
2019
- 2019-07-23 CN CN201921157631.9U patent/CN210484194U/en active Active
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant |