Rotary hood

Abstract

The utility model relates to the technical field of smoke exhaust equipment, in particular to a rotating hood which comprises a hollow base, at least three supporting rods, a top cover, a hood rotating disc and a rotating limiting ring, the supporting rods are perpendicularly connected between the periphery of the hollow base and the periphery of the top cover, any three supporting rods are located at the vertex angles of a triangle, and the rotating limiting ring is arranged on the top cover. The air cap rotating disc is of a cylindrical cover-shaped structure and covers the top cover and all the supporting rods, the center of the top cover and the center of the top of the air cap rotating disc are rotationally assembled, the rotating axis of the air cap rotating disc is located on the central axis of the rotating air cap, the rotating limiting ring is fixed to the peripheral side of the hollow base, and the supporting rods are perpendicular to the rotating limiting ring. And the rotary limiting ring is positioned in the bottom opening of the hood turntable. According to the rotating hood, a rotating shaft in a common hood structure is omitted, airflow can enter and exit from the hollow base, the structure is simple, the cost is low, and the smoke exhaust and ventilation effects are improved.

Description

Technical Field

[0001] The present application relates to the technical field of smoke exhaust equipment, and in particular to a rotary hood. Background Art

[0002] The existing hood includes a base and an annular fan unit. The annular fan unit is arranged on the base and can rotate relative to the base. The annular fan unit includes a plurality of blades. There is a smoke exhaust channel between adjacent blades. The smoke exhaust channel has a smoke inlet and a smoke outlet. The gas medium in the hood (the gas medium includes but is not limited to kitchen fumes and toilet odors) first enters the smoke exhaust channel from the smoke inlet, and then the gas medium in the smoke exhaust channel is discharged to the outside of the hood through the smoke outlet.

[0003] After searching, the Chinese patent application number: 202210104396.9 discloses a hood installed on the top of the flue of a building, including a base, a top cover and an annular fan unit, wherein the top cover is located above the base, the annular fan unit is located between the top cover and the base, and the annular fan unit can rotate relative to the base. The annular fan unit includes at least two blades, and there is a smoke exhaust channel between adjacent blades. The smoke exhaust channel has a smoke inlet and a smoke outlet located outside the smoke inlet. The projection of the smoke inlet on the horizontal plane does not correspond to the projection of the smoke outlet on the horizontal plane, and the projection of the smoke outlet in the vertical direction is located on at least one blade. Among them, the annular fan unit also includes a rotating shaft, the upper end of the rotating shaft passes through the avoidance hole on the wind guide cover and is fixedly connected to the top cover, and the lower end of the rotating shaft is rotatably connected to the base.

[0004] Regarding the above-mentioned related technologies, the inventors believe that there are the following technical defects that need to be improved:

[0005] Common hood structures basically contain a rotating shaft arranged at the central axis. Since the lower end of the rotating shaft needs to be rotatably connected to the base, and the base is an important inlet of the airflow channel, setting a structure for the rotatable installation of the lower end of the rotating shaft on the base will inevitably have a great impact on the airflow in and out. Not only is the structure complex and the cost high, but the smoke exhaust and ventilation effect is also poor. Utility Model Content

[0006] This application provides a rotating hood to improve the following technical problems:

[0007] Common hood structures basically contain a rotating shaft arranged at the central axis. Since the lower end of the rotating shaft needs to be rotatably connected to the base, and the base is an important inlet of the airflow channel, setting a structure for the rotatable installation of the lower end of the rotating shaft on the base will inevitably have a great impact on the airflow in and out. Not only is the structure complex and the cost high, but the smoke exhaust and ventilation effect is also poor.

[0008] This application provides a rotating hood, which adopts the following technical solution:

[0009] A rotating hood comprises a hollow base, at least three support rods, a top cover, a hood turntable and a rotation limit ring, wherein the support rods are vertically connected between the periphery of the hollow base and the periphery of the top cover, wherein any three of the support rods are located at the top angles of a triangle, the hood turntable is a cylindrical cover-like structure, the hood turntable covers the top cover and all the support rods, the center of the top cover is rotatably assembled with the top center of the hood turntable, the rotation axis of the hood turntable is located on the central axis of the rotating hood, the rotation limit ring is fixed to the outer peripheral side of the hollow base, and the support rods are arranged vertically to the rotation limit ring, and the rotation limit ring is located in the bottom opening of the hood turntable.

[0010] In a feasible technical solution of the present application, the hood turntable includes a bottom ring, multiple blades and a top plate, the blades are vertically connected between the bottom of the top plate and the upper surface of the bottom ring, and there are gaps between adjacent blades for airflow in and out.

[0011] In a feasible technical solution of the present application, the blade is a bent metal plate formed by stamping as one piece, and the blade includes a first piece, a second piece and a connecting piece, and the connecting piece is arranged between the first piece and the second piece. The angle between the first piece and one side of the connecting piece is between 115-135 degrees, and the angle between the second piece and the other side of the connecting piece is between 115-135 degrees.

[0012] In a feasible technical solution of the present application, the blade also includes a top flange and a bottom flange, the top flange is vertically connected to the top of the first piece and the second piece, and the top flange is fixed to the top plate by bolts, and the bottom flange is vertically connected to the bottom of the first piece and the second piece, and the bottom flange is fixed to the bottom ring by bolts.

[0013] In a feasible technical solution of the present application, a rotation hole is provided at the center of the top plate, a rotation bearing is provided at the center of the upper surface of the top cover, and the rotation bearing is rotatably assembled in the rotation hole.

[0014] In a feasible technical solution of the present application, a plurality of groups of evenly spaced ball pulleys are provided on the circumference of the upper surface of the top cover, and the freely rotating balls on the ball pulleys abut against the lower surface of the top plate.

[0015] In a feasible technical solution of the present application, the number of the support rods is between 3 and 7, and the plurality of support rods are symmetrically arranged along the central axis of the rotating hood.

[0016] In a feasible technical solution of the present application, the hollow base includes a square frame plate and a polygonal frustum tube frame, the cross-sectional area of ​​the polygonal frustum tube frame gradually increases from top to bottom, a center hole is provided in the middle of the square frame plate, the bottom of the polygonal frustum tube frame is connected to the center hole, and the inner side of the rotation limit ring is fixedly connected to the edge of the polygonal frustum tube frame.

[0017] In a feasible technical solution of the present application, the polygonal frustum tube frame includes multiple side panels and multiple corner panels, the corner panels are used to form the edges of the polygonal frustum tube frame, the side panels are isosceles trapezoidal in shape, and the two sides of the side panels are fixed to the adjacent corner panels by bolts.

[0018] In a feasible technical solution of the present application, the polygonal frustum tube frame further includes a plurality of fixing plates, the fixing plates are fixed to the tops of the angle plates, and the bottoms of the support rods are vertically connected to the fixing plates.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] Because the center of the top cover is rotatably assembled with the top center of the hood turntable, and the hood turntable has high rotational stability during rotation due to the presence of a rotation limit ring, the rotating shaft in common hood structures is eliminated. Consequently, there is no need for a rotating structure matching the rotating shaft on the hollow base, which facilitates airflow in and out of the hollow base. The structure is simple and cost-effective, and the smoke exhaust and ventilation effect is improved. Multiple sets of ball pulleys are evenly spaced around the upper surface of the top cover, further improving the stability of the hood turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 It is a structural schematic diagram of the rotary hood of an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the exploded structure of the rotating hood in the embodiment of the present application.

[0024] Figure 3 It is a schematic diagram of the structure of the blade in the embodiment of the present application.

[0025] Description of reference numerals:

[0026] 1. Hollow base; 11. Square frame; 12. Polygonal pyramid frame; 121. Side panel; 122. Corner panel; 123. Fixed plate;

[0027] 2. Support rod;

[0028] 3. Top cover; 31. Rotating bearing; 32. Ball pulley;

[0029] 4. Hood turntable; 41. Bottom ring; 42. Blades; 421. First blade; 422. Second blade; 423. Connecting piece; 424. Top flange; 425. Bottom flange; 43. Top plate; 431. Rotation hole;

[0030] 5. Turn the limit ring. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0035] The following is combined with Figure 1-3 This application is described in further detail.

[0036] The embodiment of the present application discloses a rotating hood. Figure 1-3The rotating hood includes a hollow base 1, at least three support rods 2, a top cover 3, a hood turntable 4 and a rotation limit ring 5. The support rods 2 are vertically connected between the periphery of the hollow base 1 and the periphery of the top cover 3, wherein any three support rods 2 are located at the top angles of a triangle. The hood turntable 4 is a cylindrical cover-like structure. The hood turntable 4 covers the top cover 3 and all the support rods 2. The center of the top cover 3 is rotatably assembled with the top center of the hood turntable 4. The rotation axis of the hood turntable 4 is located on the central axis of the rotating hood. The rotation limit ring 5 is fixed to the outer peripheral side of the hollow base 1, and the support rods 2 are arranged vertically to the rotation limit ring 5. The rotation limit ring 5 is located in the bottom opening of the hood turntable 4.

[0037] The hood turntable 4 includes a bottom ring 41, multiple blades 42 and a top plate 43. The blades 42 are vertically connected between the bottom of the top plate 43 and the upper surface of the bottom ring 41. There are gaps between adjacent blades 42 for air flow in and out, and the blades 42 are bent metal plates formed by stamping. The blades 42 include a first piece 421, a second piece 422 and a connecting piece 423. The connecting piece 423 is arranged between the first piece 421 and the second piece 422. The angle between the first piece 421 and one side of the connecting piece 423 is between 115-135 degrees, and the angle between the second piece 422 and the other side of the connecting piece 423 is between 115-135 degrees.

[0038] The hood turntable 4 of the above-mentioned design has a simple and stable structure, high airflow efficiency, and relatively stable rotation, which is conducive to smoke exhaust and ventilation.

[0039] In order to facilitate the assembly, fixation and subsequent maintenance of the blade 42, the blade 42 also includes a top flange 424 and a bottom flange 425. The top flange 424 is vertically connected to the top of the first piece 421 and the second piece 422, and the top flange 424 and the top plate 43 are fixed by bolts. The bottom flange 425 is vertically connected to the bottom of the first piece 421 and the second piece 422, and the bottom flange 425 and the bottom ring 41 are fixed by bolts.

[0040] In order to achieve stable and smooth rotation between the top cover 3 and the hood turntable 4, a rotation hole 431 is provided at the center of the top plate 43, and a rotation bearing 31 is provided at the center of the upper surface of the top cover 3, and the rotation bearing 31 is rotatably assembled in the rotation hole 431.

[0041] Furthermore, in order to ensure that the hood turntable 4 can rotate stably relative to the top cover 3 and reduce the sliding friction resistance between the hood turntable 4 and the top cover 3, a plurality of groups of evenly spaced ball pulleys 32 are provided on the circumferential side of the upper surface of the top cover 3, and the freely rotating balls on the ball pulleys 32 abut against the lower surface of the top plate 43.

[0042] In order to simplify the structure and control the total production cost while ensuring high structural stability, the number of support rods 2 is between 3 and 7, and the multiple support rods 2 are symmetrically spaced along the central axis of the rotating hood.

[0043] Specifically, the hollow base 1 includes a square frame plate 11 and a polygonal frustum tube frame 12. The cross-sectional area of ​​the polygonal frustum tube frame 12 gradually increases from top to bottom. A center hole is provided in the middle of the square frame plate 11. The bottom of the polygonal frustum tube frame 12 is connected to the center hole, and the inner side of the rotating limit ring 5 is fixedly connected to the edge of the polygonal frustum tube frame 12.

[0044] The polygonal frustum barrel frame 12 includes multiple side panels 121 and multiple corner panels 122. The corner panels 122 are used to form the edges of the polygonal frustum barrel frame 12. The side panels 121 are isosceles trapezoidal in shape, and the two sides of the side panels 121 are fixed to the adjacent corner panels 122 by bolts.

[0045] The hollow base 1 designed above has a simple and stable structure, is easy to install and fix, and has low resistance to airflow in and out, which is conducive to efficient smoke exhaust and ventilation.

[0046] In order to make the connection between the support rod 2 and the hollow base 1 more secure, the polygonal frustum tube frame 12 also includes multiple fixing plates 123. The fixing plates 123 are fixed to the top of the angle plates 122, and the bottom of the support rod 2 is vertically connected to the fixing plates 123.

[0047] The beneficial technical effects of the rotating hood of the embodiment of the present application are roughly as follows:

[0048] Since the center of the top cover 3 is rotatably assembled with the top center of the hood turntable 4, and the hood turntable 4 has the characteristic of high rotation stability during rotation due to the presence of the rotation limit ring 5, the rotating shaft in the common hood structure is eliminated, and thus there is no need to add a rotating structure matching the rotating shaft on the hollow base 1, which is conducive to the airflow in and out of the hollow base 1, has a simple structure and low cost, and improves the smoke exhaust and ventilation effect.

[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the scope of protection of the present application.

Claims

1. A rotary hood, characterized in that: The utility model comprises a hollow base (1), at least three support rods (2), a top cover (3), a hood turntable (4) and a rotation limit ring (5), wherein the support rods (2) are vertically connected between the periphery of the hollow base (1) and the periphery of the top cover (3), wherein any three of the support rods (2) are arranged at the top angles of a triangle, the hood turntable (4) is a cylindrical cover-like structure, the hood turntable (4) covers the top cover (3) and all the support rods (2), the center of the top cover (3) is rotatably assembled with the top center of the hood turntable (4), the rotation axis of the hood turntable (4) is located on the central axis of the rotating hood, the rotation limit ring (5) is fixed to the outer peripheral side of the hollow base (1), and the support rods (2) are arranged vertically with the rotation limit ring (5), and the rotation limit ring (5) is located in the bottom opening of the hood turntable (4).

2. The rotary hood according to claim 1, characterized in that: The hood turntable (4) comprises a bottom ring (41), a plurality of blades (42) and a top plate (43); the blades (42) are vertically connected between the bottom of the top plate (43) and the upper surface of the bottom ring (41); and gaps for airflow in and out are provided between adjacent blades (42).

3. The rotary hood according to claim 2, characterized in that: The blade (42) is a bent metal plate formed by stamping. The blade (42) includes a first piece (421), a second piece (422) and a connecting piece (423). The connecting piece (423) is arranged between the first piece (421) and the second piece (422). The angle between the first piece (421) and one side of the connecting piece (423) is between 115 and 135 degrees, and the angle between the second piece (422) and the other side of the connecting piece (423) is between 115 and 135 degrees.

4. The rotary hood according to claim 3, characterized in that: The blade (42) further includes a top flange (424) and a bottom flange (425), wherein the top flange (424) is vertically connected to the top of the first piece (421) and the second piece (422), and the top flange (424) is fixed to the top plate (43) by bolts, and the bottom flange (425) is vertically connected to the bottom of the first piece (421) and the second piece (422), and the bottom flange (425) is fixed to the bottom ring (41) by bolts.

5. The rotary hood according to claim 2, characterized in that: A rotation hole (431) is provided at the center of the top plate (43), a rotation bearing (31) is provided at the center of the upper surface of the top cover (3), and the rotation bearing (31) is rotatably assembled in the rotation hole (431).

6. The rotary hood according to claim 5, characterized in that: A plurality of groups of evenly spaced ball pulleys (32) are provided on the circumference of the upper surface of the top cover (3), and the freely rotating balls on the ball pulleys (32) abut against the lower surface of the top plate (43).

7. The rotary hood according to claim 1, characterized in that: The number of the support rods (2) is between 3 and 7, and the plurality of support rods (2) are symmetrically spaced along the central axis of the rotating hood.

8. The rotary hood according to claim 1, characterized in that: The hollow base (1) comprises a square frame plate (11) and a polygonal frustum tube frame (12). The cross-sectional area of ​​the polygonal frustum tube frame (12) gradually increases from top to bottom. A central hole is provided in the middle of the square frame plate (11). The bottom of the polygonal frustum tube frame (12) is connected to the central hole. The inner side of the rotation limiting ring (5) is fixedly connected to the edge of the polygonal frustum tube frame (12).

9. The rotary hood according to claim 8, characterized in that: The polygonal frustum barrel frame (12) comprises a plurality of side panels (121) and a plurality of angle panels (122), wherein the angle panels (122) are used to form edges of the polygonal frustum barrel frame (12), the side panels (121) are in the shape of an isosceles trapezoid, and the two sides of the side panels (121) are fixed to the adjacent angle panels (122) by bolt connection.

10. The rotary hood according to claim 9, characterized in that: The multi-sided pyramidal barrel frame (12) further comprises a plurality of fixing plates (123), wherein the fixing plates (123) are fixed to the tops of the angle plates (122), and the bottoms of the support rods (2) are vertically connected to the fixing plates (123).

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