CN215062649U - Anti-backflow wind cap - Google Patents
Anti-backflow wind cap Download PDFInfo
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- CN215062649U CN215062649U CN202120810206.6U CN202120810206U CN215062649U CN 215062649 U CN215062649 U CN 215062649U CN 202120810206 U CN202120810206 U CN 202120810206U CN 215062649 U CN215062649 U CN 215062649U
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- drainage cover
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- smoke
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Abstract
The utility model relates to a backflow-preventing hood, which comprises a base, a lower drainage cover plate, an upper drainage cover plate and a wind shield; the lower drainage cover plate is arranged right above the base, the orthographic projection from top to bottom covers the smoke outlet, the middle part of the lower drainage cover plate is hollow to form a smoke passing hole, and the bottom end surface of the lower drainage cover plate is higher than the top end surface of the base by a first preset height; the upper drainage cover plate is arranged right above the lower drainage cover plate, and the smoke hole is covered by the orthographic projection from top to bottom, so that rain and snow are prevented from directly falling into the smoke hole. The bottom end surface of the upper drainage cover plate is higher than the top end surface of the lower drainage cover plate by a second preset height; the lower drainage cover plate and the upper drainage cover plate form a two-layer tower type smoke exhaust structure above the base so that smoke can be divided up and down, and the height of the single-layer smoke exhaust structure in the vertical direction is effectively reduced relative to the single-layer smoke exhaust structure, so that the possibility that wind enters the base and the exhaust pipe is reduced. The wind shield covers the outer part of the two layers of smoke exhaust structures, and the wind shield reduces the possibility that rain, snow and wind enter the base and the exhaust pipe, so that the smoke exhaust efficiency is obviously improved.
Description
Technical Field
The utility model relates to an exhaust device technical field especially relates to a prevent flowing backward hood.
Background
The anti-backflow wind cap is a device for circulating indoor and outdoor air, is usually fixed at one end of the exhaust pipe extending to the outdoor, can effectively prevent rain and snow from flowing into the exhaust pipe, and ensures the smoothness of the exhaust pipe.
However, when the traditional anti-backflow hood is used for smoke exhaust, the smoke exhaust efficiency is low.
SUMMERY OF THE UTILITY MODEL
When being used for discharging fume for solving traditional anti-backflow hood, the lower problem of smoke extraction efficiency, the utility model provides an anti-backflow hood.
The utility model provides a downdraught prevention cap, which comprises a base, a lower drainage cover plate, an upper drainage cover plate and a wind shield;
the base is hollow, the bottom opening is a smoke inlet, and the top opening is a smoke outlet;
the lower drainage cover plate is arranged right above the base, the orthographic projection from top to bottom covers the smoke outlet, the middle part of the lower drainage cover plate is hollow to form a smoke passing hole, and the bottom end surface of the lower drainage cover plate is higher than the top end surface of the base by a first preset height;
the upper drainage cover plate is arranged right above the lower drainage cover plate, the smoke passing hole is covered by the orthographic projection from top to bottom, and the bottom end surface of the upper drainage cover plate is higher than the top end surface of the lower drainage cover plate by a second preset height;
the windshield cover is hollow, the top end and the bottom end of the windshield cover are of opening structures, the windshield cover is arranged outside the top ends of the lower drainage cover plate, the upper drainage cover plate and the base, the top end face of the windshield cover is higher than the third preset height of the top end face of the upper drainage cover plate, and the bottom end face of the windshield cover is lower than the fourth preset height of the top end face of the base.
In one embodiment, the windshield includes a side panel;
the side plates are multiple and are sequentially connected end to form a cylindrical structure; the plane of each side plate and the vertical direction form a preset included angle, the top end face is higher than the third preset height of the top end face of the upper drainage cover plate, and the bottom end face is lower than the fourth preset height of the top end face of the base.
In one embodiment, the predetermined included angle is 0 to 45 degrees.
In one embodiment, the middle of the bottom end face of the upper drainage cover plate is provided with a lower convex part which is convex towards the smoke passing hole.
In one embodiment, the middle part of the top end surface of the upper drainage cover plate is provided with an upper convex part which is convex back to the smoke passing hole.
In one embodiment, the base, the lower drainage cover plate, the upper drainage cover plate and the wind shield are of square structures;
the device also comprises a lower connecting block;
the four lower connecting blocks are respectively arranged at four corners of the top end of the base; each lower connecting block is integrally of an L-shaped structure and comprises a supporting part and a fixing part;
one end of the fixing part is fixedly connected with one side of the bottom end of the supporting part, and the other end of the fixing part extends back to the supporting part;
the bottom ends of the supporting parts of the four lower connecting blocks are respectively fixed at four corners of the top end of the base, and the top ends of the supporting parts of the four lower connecting blocks are respectively fixed at four corners of the bottom end of the lower drainage cover plate;
one ends of the fixing parts of the four lower connecting blocks, which are far away from the supporting part, are fixedly connected with four corners of the bottom end of the windshield respectively.
In one specific embodiment, the device further comprises an upper connecting rod;
the four upper connecting rods are respectively fixed at the four corners of the top end of the lower drainage cover plate at the bottom ends of the four upper connecting rods, and the four corners of the bottom end of the upper drainage cover plate at the top ends of the four upper connecting rods are respectively fixed at the four corners of the bottom end of the lower drainage cover plate at the top ends of the four upper connecting rods.
In one embodiment, the base, the lower drainage cover plate, the upper drainage cover plate, the wind shield and the lower connecting block are made of concrete;
the upper connecting rod is made of iron.
In one embodiment, the four corners of the top end of the base are respectively provided with a first installation notch, and the first installation notches are matched with the bottom ends of the supporting parts;
the four corners department of the bottom of windshield all is equipped with a second installation breach, and the supporting part was kept away from to second installation breach and fixed part one end looks adaptation.
In one embodiment, the size of the base is 200mm × 200-;
the size of the lower drainage cover plate is 200-800mm multiplied by 200-800 mm;
the size of the upper drainage cover plate is 200-800mm multiplied by 200-800 mm;
the size of the smoke outlet is 400-;
the size of the smoke inlet is 300-1100mm multiplied by 300-1100 mm;
the size of the smoke passing hole is 50-600mm multiplied by 50-600 mm;
the first preset height is 50-150 mm;
the second preset height is 30-200 mm;
the third preset height is 40-180 mm;
the fourth preset height is 50-200 mm.
The utility model has the advantages that: the utility model discloses a prevent flowing backward hood is through setting up drainage apron down, go up drainage apron and windshield, the bottom face of drainage apron is higher than the first height of predetermineeing of the top face of base down, the bottom face of going up the drainage apron is higher than the top face second of drainage apron down and predetermines the height, thus, drainage apron and last drainage apron constitute two-layer tower smoke exhaust structure in the top of base down, four sides of every layer of smoke exhaust structure are open structure, can follow four sides of every layer of smoke exhaust structure and flow out from the flue gas of the two-layer smoke exhaust structure of outlet flue flow direction, and shunt from top to bottom, smoke exhaust area has been enlarged effectively. Compared with a single-layer smoke exhaust structure, the single-layer smoke exhaust structure effectively reduces the height of the single-layer smoke exhaust structure in the vertical direction on the premise of ensuring the effective smoke exhaust area of the smoke exhaust structure, thereby reducing the possibility that rain, snow and wind enter the base and the exhaust pipe, and further improving the smoke exhaust efficiency. And a wind shield is covered outside the two layers of smoke exhaust structures, the top end surface of the wind shield is higher than the third preset height of the top end surface of the upper drainage cover plate, and the bottom end surface of the wind shield is lower than the fourth preset height of the top end surface of the base. Therefore, the wind shield can prevent wind outside the wind shield from flowing to the double-layer smoke exhaust structure, the possibility that rain, snow and wind enter the base and the exhaust pipe is further reduced, and the smoke exhaust efficiency is remarkably improved.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a downdraft prevention cap of the present invention;
fig. 2 is a schematic structural view of another embodiment of the anti-backflow hood of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axis", "circumferential" and the like refer to the orientation or positional relationship shown in the drawings, which are only for convenience of description of the present invention or simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1 and 2, the anti-backflow cap includes a base 110, a lower drainage cover plate 120, an upper drainage cover plate 130, and a windshield 140. The base 110 is hollow, with a bottom opening being a smoke inlet and a top opening being a smoke outlet. The lower drainage cover plate 120 is arranged right above the base 110, the orthographic projection from top to bottom covers the smoke outlet, the middle part of the lower drainage cover plate is hollow to form a smoke passing hole, and the bottom end surface of the lower drainage cover plate is higher than the first preset height of the top end surface of the base 110. The upper drainage cover plate 130 is arranged right above the lower drainage cover plate 120, the smoke hole is covered by the orthographic projection from top to bottom, and the bottom end surface is higher than the second preset height of the top end surface of the lower drainage cover plate 120. The windshield 140 is hollow, has an open top and a open bottom, and is covered outside the top ends of the lower drainage cover plate 120, the upper drainage cover plate 130 and the base 110, the top end surface of the windshield is higher than the third preset height of the top end surface of the upper drainage cover plate 130, and the bottom end surface of the windshield is lower than the fourth preset height of the top end surface of the base 110.
In this embodiment, the top end of the exhaust pipe extends to the outside of the room. The bottom end of the base 110 is fixedly connected to and communicates with the top end of the exhaust pipe. The smoke in the exhaust pipe flows into the base 110 through the smoke inlet, and the smoke in the base 110 flows out from the smoke outlet. Wherein, the lower drainage cover plate 120 is arranged right above the base 110, the orthographic projection from the top to the bottom completely covers the smoke outlet, and the middle part is hollow to form a smoke passing hole. Thus, a part of the smoke flowing from the smoke outlet to the downward flow guiding cover plate 120 enters into the smoke passing hole, and the other part of the smoke flows downward around the downward flow guiding cover plate 120 under the guiding of the downward flow guiding cover plate 120 and flows out from the top opening and the bottom opening of the wind shield 140. The upper drainage cover plate 130 is arranged right above the lower drainage cover plate 120, and the orthographic projection from top to bottom completely covers the smoke hole, so that rain and snow can be prevented from directly falling into the smoke hole. Thus, the smoke flowing from the smoke passing hole to the upper flow guiding cover plate 130 flows around the upper flow guiding cover plate 130 under the guiding of the upper flow guiding cover plate 130, and then is split vertically and flows out from the top opening and the bottom opening of the wind shield 140. Wherein, the bottom surface of drainage apron 120 is higher than the first height of predetermineeing of the top surface of base 110 down, the bottom surface of drainage apron 130 is higher than the second height of predetermineeing of the top surface of drainage apron 120 down, drainage apron 120 and drainage apron 130 constitute two-layer tower smoke exhaust structure in the top of base 110 down, four sides of every layer of smoke exhaust structure are open structure, the flue gas that flows to two-layer smoke exhaust structure from the outlet flue can flow from four sides of every layer of smoke exhaust structure, smoke exhaust area has been increased effectively. Compared with a single-layer smoke exhaust structure, the height of the single-layer smoke exhaust structure in the vertical direction is effectively reduced on the premise of ensuring the effective smoke exhaust area of the smoke exhaust structure, so that the possibility of rain, snow and wind entering the base 110 and the exhaust pipe is reduced, and the smoke exhaust efficiency is improved. The two-layer smoke exhausting structure is covered with a wind shield 140, and the top end surface of the wind shield 140 is higher than the third preset height of the top end surface of the upper drainage cover plate 130, and the bottom end surface is lower than the fourth preset height of the top end surface of the base 110. Thus, the wind shield 140 can prevent the wind outside the wind shield 140 from flowing to the double-layer smoke discharging structure, and further reduces the possibility that rain, snow and wind are poured into the base 110 and the exhaust pipe, thereby significantly improving the smoke discharging efficiency.
In an embodiment of the present invention, the wind shield 140 includes four side plates, which are connected to form a square tube-shaped structure. The plane of each side plate is a preset included angle with the vertical direction, the top end face is higher than the third preset height of the top end face of the upper drainage cover plate 130, and the bottom end face is lower than the fourth preset height of the top end face of the base 110. The side plates on each side are spaced from the edge of the corresponding side of the lower drainage cap plate 120 by a distance less than the edge of the corresponding side of the upper drainage cap plate 130. And the included angle between the plane of each side plate and the vertical direction is less than 45 degrees. Therefore, the wind outside the windshield 140 can be prevented from flowing into the inner side of the windshield 140, the possibility that the wind obliquely flows into the double-layer smoke exhaust structure from the top end of the windshield 140 is reduced, the possibility that rain, snow and wind enter the base 110 and the exhaust pipe is greatly reduced, and the smoke exhaust efficiency is improved. In a whole, the upper drainage cover plate 130 and the lower drainage cover plate 120 are matched with the wind shield 140, so that the possibility that rain, snow and wind enter the base 110 and the exhaust pipe can be effectively reduced, the smoothness of exhaust is guaranteed, and the exhaust efficiency is improved.
In an embodiment of the present invention, the middle of the bottom end surface of the upper drainage cover plate 130 is provided with a lower protrusion 131 protruding toward the smoke passing hole. So for the horizontal wind channel that forms between upper drainage apron 130 and the lower drainage apron 120, its middle part is narrower, and is wider all around, and the flue gas can be followed the middle part and spread all around. When the smoke flows through the middle area, the middle part of the horizontal air duct is narrower, the flow velocity is faster, and negative pressure is formed to prevent the wind from flowing backwards. The middle part of the top end face of the upper drainage cover plate 130 is provided with an upper protruding part 132 which is back to the smoke passing hole, so that the rain and snow water can slide down from the top end of the upper drainage cover plate 130, the rainwater can be prevented from being detained, and the possibility that the rain and snow water enters the base 110 and the exhaust pipe can be reduced.
In one embodiment of the present invention, the base 110, the lower drain cover 120, the upper drain cover 130 and the windshield 140 are square. The anti-backflow wind cap further includes a lower connection block 150 and an upper connection rod 160.
The number of the lower connecting blocks 150 is four, and the four lower connecting blocks are respectively arranged at four corners of the top end of the base 110. Specifically, each lower connection block 150 has an overall "L" shaped structure including a support portion 151 and a fixing portion 152. The supporting portion 151 can effectively support and fix the lower drain cover 120, and the fixing portion 152 can effectively support and fix the windshield 140. Specifically, one end of the fixing portion 152 of each lower connection block 150 is fixedly connected to one side of the bottom end of the supporting portion 151, and the other end extends away from the supporting portion 151. The bottom ends of the supporting portions 151 of the four lower connecting blocks 150 are respectively fixed at four corners of the top end of the base 110, and the top ends are respectively fixed at four corners of the bottom end of the lower drainage cover plate 120. One ends of the fixing portions 152 of the four lower connecting blocks 150, which are far away from the supporting portions 151, are fixedly connected with four corners of the bottom end of the windshield 140, respectively. Correspondingly, a first installation notch is arranged at each of the four corners of the top end of the base 110, and the first installation notches are matched with the bottom ends of the supporting parts 151. The four corners of the bottom end of the windshield 140 are respectively provided with a second installation notch, and the second installation notch is matched with one end of the fixing portion 152 far away from the supporting portion 151. First installation breach and second installation breach are favorable to the location installation, improve the installation effectiveness to the steadiness of connecting after having ensured the installation.
The number of the upper connecting rods 160 is four, the bottom ends of the four upper connecting rods 160 are respectively fixed at four corners of the top end of the lower drainage cover plate 120, and the top ends of the four upper connecting rods 160 are respectively fixed at four corners of the bottom end of the upper drainage cover plate 130. The upper connecting rods 160 can effectively support the fixed upper drainage cover plate 130.
In an embodiment of the present invention, the base 110, the lower drainage cover plate 120, the upper drainage cover plate 130, the windshield 140 and the lower connecting block 150 are made of concrete. The upper connecting rod 160 is made of iron, and the bottom end of the upper connecting rod 160 can be embedded in the top end of the lower drainage cover plate 120. So for prevent flowing backward hood overall structure intensity is great, non-deformable and collapse, reduced the cost of later maintenance. Moreover, the anti-backflow wind cap is large in overall weight, good in pulling resistance and high in position stability, and the anti-backflow effect is guaranteed. In one embodiment of the present invention, the first and second,
in a specific embodiment of the present invention, the size of the base is 200mm × 200-. On the whole, the possibility that rain, snow and wind are poured into the base 110 and the exhaust pipe can be effectively reduced, the smoothness of exhaust is guaranteed, and the exhaust efficiency is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," "one specific embodiment," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only the specific implementation manner of the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the utility model within the scope of the present invention.
Claims (10)
1. The utility model provides a prevent flowing backward hood which characterized in that includes:
the device comprises a base, a lower drainage cover plate, an upper drainage cover plate and a wind shield;
the base is hollow, the bottom opening is a smoke inlet, and the top opening is a smoke outlet;
the lower drainage cover plate is arranged right above the base, the orthographic projection from top to bottom covers the smoke outlet, the middle part of the lower drainage cover plate is hollow to form a smoke passing hole, and the bottom end surface of the lower drainage cover plate is higher than the top end surface of the base by a first preset height;
the upper drainage cover plate is arranged right above the lower drainage cover plate, the smoke passing hole is covered by the orthographic projection from top to bottom, and the bottom end surface of the upper drainage cover plate is higher than the top end surface of the lower drainage cover plate by a second preset height;
the windshield cover is hollow, the top end and the bottom end of the windshield cover are of opening structures, the windshield cover covers the lower drainage cover plate, the upper drainage cover plate and the outer portion of the top end of the base, the top end face of the windshield cover is higher than a third preset height of the top end face of the upper drainage cover plate, and the bottom end face of the windshield cover is lower than a fourth preset height of the top end face of the base.
2. The anti-backflow hood according to claim 1, wherein the windshield includes side panels;
the side plates are multiple and are sequentially connected end to form a cylindrical structure; each side plate is located on a plane which forms a preset included angle with the vertical direction, the top end face of each side plate is higher than the top end face of the upper drainage cover plate by a third preset height, and the bottom end face of each side plate is lower than the top end face of the base by a fourth preset height.
3. The anti-backflow hood according to claim 2, wherein the preset included angle is 0-45 degrees.
4. The anti-backflow cap according to any one of claims 1 to 3, wherein the middle of the bottom end face of the upper drainage cover plate is provided with a lower convex portion which is convex towards the smoke passing hole.
5. The anti-backflow cap according to any one of claims 1 to 3, wherein the middle of the top end surface of the upper drainage cover plate is provided with an upper convex part which is convex away from the smoke passing hole.
6. The anti-backflow hood according to any one of claims 1 to 3, wherein the base, the lower drainage cover plate, the upper drainage cover plate and the windshield are of a square structure;
the device also comprises a lower connecting block;
the four lower connecting blocks are respectively arranged at four corners of the top end of the base; each lower connecting block is integrally of an L-shaped structure and comprises a supporting part and a fixing part;
one end of the fixing part is fixedly connected with one side of the bottom end of the supporting part, and the other end of the fixing part extends back to the supporting part;
the bottom ends of the supporting parts of the four lower connecting blocks are respectively fixed at four corners of the top end of the base, and the top ends of the supporting parts of the four lower connecting blocks are respectively fixed at four corners of the bottom end of the lower drainage cover plate;
one ends, far away from the supporting parts, of the fixing parts of the four lower connecting blocks are fixedly connected with four corners of the bottom end of the windshield respectively.
7. The anti-backflow hood according to claim 6, further comprising an upper connecting rod;
the upper connecting rods are four, the bottom ends of the upper connecting rods are respectively fixed at four corners of the top end of the lower drainage cover plate, and the top ends of the upper connecting rods are respectively fixed at four corners of the bottom end of the upper drainage cover plate.
8. The anti-backflow hood according to claim 7, wherein the base, the lower drainage cover plate, the upper drainage cover plate, the windshield and the lower connecting block are made of concrete;
the upper connecting rod is made of iron.
9. The anti-backflow hood according to claim 6, wherein the four corners of the top end of the base are provided with a first installation notch, and the first installation notches are matched with the bottom ends of the supporting parts;
and the four corners of the bottom end of the windshield are respectively provided with a second installation notch, and the second installation notches are matched with one ends, far away from the supporting parts, of the fixing parts.
10. The anti-backflow hood as claimed in any one of claims 1 to 3, wherein the size of the base is 200mm x 200 x 700mm x 100 x 500 mm;
the size of the lower drainage cover plate is 200-800mm and 200-800 mm;
the size of the upper drainage cover plate is 200-800mm and 200-800 mm;
the size of the smoke outlet is 400-1200mm multiplied by 400-1200 mm;
the size of the smoke inlet is 300-1100mm multiplied by 300-1100 mm;
the size of the smoke passing hole is 50-600mm multiplied by 50-600 mm;
the first preset height is 50-150 mm;
the second preset height is 30-200 mm;
the third preset height is 40-180 mm;
the fourth preset height is 50-200 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120810206.6U CN215062649U (en) | 2021-04-20 | 2021-04-20 | Anti-backflow wind cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120810206.6U CN215062649U (en) | 2021-04-20 | 2021-04-20 | Anti-backflow wind cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215062649U true CN215062649U (en) | 2021-12-07 |
Family
ID=79106926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120810206.6U Active CN215062649U (en) | 2021-04-20 | 2021-04-20 | Anti-backflow wind cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215062649U (en) |
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2021
- 2021-04-20 CN CN202120810206.6U patent/CN215062649U/en active Active
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