Wind cap

Abstract

The invention belongs to the technical field of exhaust passage systems, and provides a hood which is arranged at an air outlet of an exhaust passage and comprises a base with an air inlet, a rainproof cover plate arranged above the air inlet, a wind shielding device arranged beside the rainproof cover plate and a fixing device connected with the base, the rainproof cover plate and the wind shielding device. An air outlet channel communicated with the air inlet is arranged between the rainproof cover plate and the wind shielding device, and the lower end of the rain shielding plate is hinged to the wind shielding device and / or the fixing device and / or the rainproof cover plate through a hinge piece. The opening angle of the rain baffle is automatically adjusted under the action of natural wind and / or air flow exhausted from the exhaust passage so that air in the air outlet passage can flow out conveniently. According to the air cap structure, the rain baffle is additionally arranged in the air cap structure, the rain baffle is hinged to the wind shielding device or the rainproof cover plate or the fixing device, the opening angle of the rain baffle is automatically adjusted through the effect of natural wind and / or air flow exhausted in the exhaust channel, and efficient exhaust and prevention of natural wind, rain and snow from flowing backwards are achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of exhaust duct systems, and more specifically, to a hood. Background Art

[0002] The hood used for the roof of the building exhaust duct system is used to prevent the natural wind, rain and snow from flowing back into the exhaust duct, and facilitate the exhaust of the exhaust duct. However, in the prior art, there is no structural hood that can increase the exhaust area and perfectly solve the problem of natural wind, rain and snow flowing back into the exhaust duct. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a hood, aiming to solve the technical problem in the prior art that the hood cannot simultaneously meet the requirements of a large exhaust area and no backflow of natural wind, rain or snow.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is: to provide a hood, which is arranged at the air outlet of the exhaust duct, including a base with an air inlet, a rainproof cover plate arranged above the air inlet, a windshield device arranged beside the rainproof cover plate, and a fixing device connecting the base, the rainproof cover plate and the windshield device, an air outlet channel connected to the air inlet is provided between the rainproof cover plate and the windshield device, and also includes a rain shield, the lower end of the rain shield plate is hinged to the windshield device and / or the fixing device and / or the rain shield plate by a hinge, and the rain shield plate automatically adjusts its opening angle under the action of natural wind and / or exhaust airflow in the exhaust duct to facilitate the outflow of gas from the air outlet channel.

[0005] Specifically, the rain shield is a flat plate or a curved plate or an irregularly shaped plate.

[0006] Specifically, the wind shielding device is a flat plate or a spliced ​​plate formed by splicing a plurality of flat plates or L-shaped plates or an irregularly shaped plate.

[0007] Specifically, there are multiple rain shields.

[0008] Specifically, the windshield device is provided with a first through hole connected to the air outlet channel, the rain shield is hinged at the first through hole and automatically adjusts its opening angle to open the first through hole under the action of natural wind and / or exhaust airflow in the exhaust duct.

[0009] Specifically, the wind shielding device has an inclined surface, and the first through hole is arranged on the inclined surface.

[0010] Specifically, the wind shielding device is provided with a second through hole connecting the air outlet channel with the outside, and a normally closed check plate is hinged at the second through hole.

[0011] Specifically, a control member for limiting the opening angle of the rain shield is further provided on the side of the rain shield facing away from the air outlet channel.

[0012] Specifically, the control component is arranged on the hinged component, or on the windshield device; or on the rainproof cover plate, or on the fixing device.

[0013] Specifically, the base includes a hollow base body and a fixing portion extending outward along the edge of the base body, and a guide plate extending obliquely upward is also provided on the top outer wall of the base body.

[0014] In the present application, a movable rain shield is added to the existing hood structure, and the rain shield is hinged to a windshield device or a rain cover or a fixing device. The opening angle of the rain shield is automatically adjusted through the action of natural wind and / or exhaust air flow in the exhaust duct to achieve efficient exhaust and prevent backflow of natural wind, rain and snow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying any creative work.

[0016] Figure 1 A top view of the hood provided in Example 1 of the present application;

[0017] Figure 2 for Figure 1 Longitudinal section view of the stroke cap;

[0018] Figure 3 A top view of the hood provided in Example 1 of the present application;

[0019] Figure 4 for Figure 3 Longitudinal section view of the stroke cap;

[0020] Figure 5 A longitudinal cross-sectional view of the hood provided in Embodiment 3 of the present application;

[0021] Among them, the reference numerals in the figure are:

[0022] 10-base; 11-air inlet; 111-seat body; 112-fixing part; 113-deflector; 12-rain cover; 13-wind shield; 131-vertical plate; 132-upper inclined plate; 133-lower inclined plate; 134-first through hole; 135-second through hole; 136-normally closed check plate; 14-fixing device; 141-first support rod; 142-second support rod; 143-third support rod; 15-air outlet channel; 16-rain shield; 17-hinge; 18-control member; 19-support member. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0027] Embodiment 1

[0028] Reference Figure 1 , Figure 2, a hood provided in the first embodiment of the present application is arranged at the air outlet of the exhaust duct (not shown in the figure), and is used to allow the gas in the exhaust duct to be discharged smoothly from the air outlet, while preventing external gas or rain and snow from entering the exhaust duct and causing backflow. The hood includes a base 10 with an air inlet 11, a rainproof cover 12 arranged above the air inlet 11, a windshield 13 arranged beside the rainproof cover 12, and a fixing device 14 connecting the base 10, the rainproof cover 12 and the windshield 13, and an air outlet channel 15 connected to the air inlet 11 is arranged between the rainproof cover 12 and the windshield 13. In this embodiment, the hood also includes a rainshield 16, the lower end of which is hinged to the windshield 13 through a hinge 17. The rainshield 16 automatically adjusts its opening angle a under the action of natural wind and / or exhaust airflow in the exhaust duct, so as to facilitate the outflow of gas from the air outlet channel 15, and effectively prevent the backflow of natural wind, rain and snow.

[0029] Figure 2 1 is a longitudinal cross-sectional view of the hood under normal conditions, the solid line is the normal state of the rain shield 16, and the dotted line is a schematic diagram of the open state of the rain shield 16. Of course, in actual working conditions, under the influence of different wind directions of the natural wind on the roof and the airflow of the exhaust duct, the opening angles of the rain shields 16 of the hood vary.

[0030] In this embodiment, the rain cover 12 is a flat plate, which is located directly above the air inlet 11 of the base 10 and is fixed by a fixing device 14. Specifically, the fixing device 14 includes a bent first support rod 141, the middle of the first support rod 141 is vertical, and both ends are inclined. The bottom end of the first support rod 141 is fixed to the base 10, and the top end of the first support rod 141 is fixedly connected to the rain cover 12. Of course, the rain cover 12 can also be in other shapes, for example, a guide cone can be set on or below the rain cover 12 to divert the flow.

[0031] The windshield device 13 is arranged around the base 10 and the rainproof cover 12, and the fixing device 14 also includes a second support rod 142 and a third support rod 143, wherein the second support rod 142 is connected between the top of the windshield device 13 and the rainproof cover 12, and the third support rod 143 is connected between the windshield device 13 and the base 10. In this way, the base 10, the rainproof cover 12 and the windshield device 13 are fixedly connected together through the fixing device 14.

[0032] In this embodiment, the windshield 13 is formed by splicing a plurality of flat plates. Specifically, it is formed by splicing a vertical plate 131 located in the middle, and an upper inclined plate 132 and a lower inclined plate 133 located at the top and bottom of the vertical plate 131, respectively. The upper inclined plate 131 and the lower inclined plate 132 are inclined in opposite directions, and the longitudinal cross-section of the spliced ​​windshield 13 is horizontally trumpet-shaped. Of course, the windshield 13 can also be replaced by other shapes, for example, the windshield 13 can be a flat plate, or an irregularly shaped plate, or a spliced ​​plate formed by splicing a plurality of L-shaped plates.

[0033] In this embodiment, the rain shield 16 is a flat plate, which is hinged on the upper inclined plate 132 of the windshield device 13. The upper inclined plate 132 has an inclined surface, and a first through hole 134 is provided on the inclined surface. The first through hole 134 is connected to the air outlet channel 15, and the rain shield 16 is hinged at the first through hole 134. Specifically, the lower end of the rain shield 16 is hinged at the lower end of the first through hole 134. In this way, when the horizontal natural wind or the airflow in the exhaust duct from bottom to top acts, the inclined rain shield 16 will be blown open, and its opening angle a relative to the first through hole 134 will be adjusted. The first through hole 134 is opened, and the air outlet area of ​​the air outlet channel 15 connected to the outside is increased, which is convenient for the gas in the exhaust duct to be discharged. Of course, the rain shield 16 can also be a curved plate or an irregularly shaped plate.

[0034] In this embodiment, there are multiple rain shields 16. The windshield 13 is arranged along the circumference of the base 10 and the rain cover 12. Specifically, multiple rain shields 16 can be evenly arranged along the windshield 13, so that under different natural winds, it can help to open the rain shields 16 in different directions. Moreover, in this embodiment, a rain shield 16 is arranged on the same side of the windshield 13. Of course, multiple rain shields 16 can also be arranged on the same side to cover multiple first through holes 134.

[0035] Furthermore, in order to control the opening angle of the rain shield 16 so that it can return to its original position to cover the first through hole 134 when there is no wind or no gas discharge, a control member 18 for limiting the opening angle of the rain shield 16 is also provided on the side of the rain shield 16 facing away from the air outlet channel 15. Specifically, in this embodiment, the control member 18 is provided on the hinge 17. Of course, the control member 18 can also be provided on the windshield device 13. Of course, when the rain shield 16 is provided at different positions, the control member 18 can also be provided at different positions, such as when the rain shield 16 is hinged on the fixing device 14, the control member 18 is provided on the fixing device 14, and when the rain shield 16 is provided on the rainproof cover plate 12, the control member 18 is provided on the rainproof cover plate 12. As long as the control member 18 is located on the side of the rain shield 16 facing away from the air outlet channel 15 to limit its opening angle, it is sufficient.

[0036] In this embodiment, the base 10 includes a hollow base body 111 and a fixing portion 112 extending outward along the edge of the base body 111. The air inlet 11 is provided on the base 10, and the fixing portion 112 is provided with a screw hole (not shown in the figure) for fixing the fixing portion 112 to the support surface by bolts. The top outer wall of the base body 111 is also provided with a guide plate 113 extending upward obliquely. In this way, after the natural wind enters the hood through the lower end, the guide plate 113 guides the airflow upward and discharges it in the same direction as the exhaust airflow in the exhaust duct, thereby preventing the natural wind from flowing back.

[0037] In this embodiment, the rain shield 16 is hinged to the wind shield 13. Of course, the hinge 17 can also be provided on the rain cover 12 and / or on the fixing device 14. Since the rain cover 12 has the function of shielding rain and snow, the second through hole 135 cannot be provided thereon. In this case, a mounting member (not shown in the figure) is extended from the rain cover 12, and the hinge 17 is installed on the mounting member.

[0038] Embodiment 2

[0039] Reference Figure 3 , Figure 4 , a wind cap is provided in the second embodiment, and the dotted line is a schematic diagram of the state where the rain shield 16 is opened at an angle a. The difference between the second embodiment and the first embodiment is that:

[0040] 1. The windshield device 13 and the fixing device 14 are different. In this embodiment, the windshield device 13 is a flat plate, which is relatively simple to manufacture, and the folded edge of the flat plate is equivalent to the fixing device 14, which directly connects the rain cover 12 and the base 10;

[0041] Second, the rain shield 16 is hinged to the top of the windshield 13, and the rain shield 16 is supported by a support 19 to ensure its structural stability;

[0042] 3. The windshield device 13 is provided with a second through hole 135 connected to the air outlet channel, and a normally closed check plate 136 is hinged at the second through hole 135, so that the exhaust air flow from the exhaust duct blows open the normally closed check plate 136, increasing the side air outlet area and being more conducive to exhaust gas discharge.

[0043] The other structures of this embodiment are the same as those of the first embodiment and will not be described in detail.

[0044] Embodiment 3

[0045] Reference Figure 5 , a longitudinal cross-sectional view of the hood in a working state is provided in the third embodiment.

[0046] In this embodiment, the windshield 13 is formed by splicing a vertical plate 131 and an upper inclined plate 132, and the height of the upper inclined plate 132 is higher than the rain cover 12. Two first through holes 134 and two rain shields 16 are provided on the upper inclined plate 132 on the same side.

[0047] As shown in the figure, the horizontal single arrow line indicates the direction of the natural wind, and the vertical double arrow line indicates the exhaust duct airflow. Since the rain shield 16 is arranged on the inclined surface of the wind shield device 13, the opening angle of the rain shield 16 facing away from the natural wind is zero, that is, the rain shield 16 facing away from the natural wind is in a closed state, and the opening angle of the rain shield 16 facing the natural wind is the largest. Of course, the opening angle of the rain shield 16 will change under the action of the natural wind and / or the exhaust airflow in the exhaust duct. This embodiment only illustrates one of the opening states of the rain shield 16.

[0048] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A hood, arranged at the air outlet of an exhaust duct, comprising a base with an air inlet, a rainproof cover plate arranged above the air inlet, a windshield device arranged beside the rainproof cover plate, and a fixing device connecting the base, the rainproof cover plate and the windshield device, an air outlet channel connected to the air inlet is arranged between the rainproof cover plate and the windshield device, characterized in that: It also includes a rain shield, the lower end of which is hinged to the wind shield device and / or the fixing device and / or the rain cover through a hinge. The rain shield automatically adjusts its opening angle under the action of natural wind and / or exhaust air flow in the exhaust duct to facilitate the outflow of gas from the outlet channel.

2. The hood according to claim 1, characterized in that: The rain shield is a flat plate, a curved plate or an irregularly shaped plate.

3. The hood according to claim 1, characterized in that: The wind shield device is a flat plate or a spliced ​​plate formed by splicing a plurality of flat plates or L-shaped plates or an irregularly shaped plate.

4. The hood according to claim 1, characterized in that: There are multiple rain shields.

5. The hood according to claim 1, characterized in that: The windshield device is provided with a first through hole connected to the air outlet channel, and the rain shield is hinged at the first through hole and automatically adjusts its opening angle to open the first through hole under the action of natural wind and / or exhaust airflow in the exhaust duct.

6. The hood according to claim 5, characterized in that: The wind shielding device has an inclined surface, and the first through hole is arranged on the inclined surface.

7. The hood according to claim 1, characterized in that: The wind shielding device is provided with a second through hole communicating with the air outlet passage and the outside, and a normally closed check plate is hinged at the second through hole.

8. The hood according to claim 1, characterized in that: A control member for limiting the opening angle of the rain shield is also provided on the side of the rain shield facing away from the air outlet channel.

9. The hood according to claim 8, characterized in that: The control member is arranged on the hinged member, or on the windshield device; or on the rainproof cover plate, or on the fixing device.

10. The hood according to claim 1, characterized in that: The base comprises a hollow base body and a fixing portion extending outwardly along the edge of the base body, and a guide plate extending obliquely upward is also provided on the outer wall of the top of the base body.

Images