CN220017406U - Rainproof hood - Google Patents

Abstract

The utility model provides a rainproof hood which is used for preventing rainwater from flowing backward into an exhaust chimney and comprises a connecting joint, a first exhaust pipe and a second exhaust pipe, wherein the top of the connecting joint is sealed, the first exhaust pipe is respectively communicated with the exhaust chimney and the bottom of the connecting joint along the vertical direction, and the second exhaust pipe is obliquely communicated with the side wall of the connecting joint and forms an included angle of 45-75 degrees with the axial direction of the first exhaust pipe along the axial direction. Because the second exhaust pipe has inclined certain angle along vertical direction downwardly for outside rainwater is difficult to get into exhaust chimney through the second exhaust pipe, even if there is a small amount of rainwater to be blown into the second exhaust pipe in, also can receive self gravity to influence outflow second exhaust pipe, has effectively prevented that exhaust chimney from appearing the condition that the rainwater flows backward.

Description

Rainproof hood

Technical Field

The utility model belongs to the technical field of building ventilation, and particularly relates to a rainproof hood.

Background

At present, the exhaust chimney of the tail gas treatment system of the laboratory can be provided with a rainproof hood as shown in fig. 1 or 2 at the outdoor end, so that rainwater is blocked from flowing backward into the exhaust chimney during rainfall, but the existing rainproof hood is relatively simple in structure, so that the rainproof function is limited, and in particular, under the condition of heavy wind accompanying the rainfall, the rainwater still easily flows backward into the exhaust chimney through the air outlet 10, so that laboratory equipment faults, even short circuit burnout, are caused, and normal use of the laboratory is affected.

Disclosure of Invention

The utility model aims to provide a rain-proof hood, which aims to solve the problems that the existing rain-proof hood is limited in rain-proof function and easy to cause rainwater to flow backwards under the condition of heavy wind during rainfall.

In order to achieve the above purpose, the utility model adopts the technical scheme that the rain-proof hood is provided and used for preventing rainwater from flowing backward into an exhaust chimney, and comprises a connecting joint, a first exhaust pipe and a second exhaust pipe, wherein the top of the connecting joint is sealed, the first exhaust pipe is respectively communicated with the exhaust chimney and the bottom of the connecting joint along the vertical direction, and the second exhaust pipe is obliquely communicated on the side wall of the connecting joint and forms an included angle of 45-75 degrees with the axial direction of the first exhaust pipe along the axial direction.

In one embodiment, the rain-proof hood comprises a plurality of second exhaust pipes, and each second exhaust pipe is obliquely communicated with the side wall of the connecting joint at equal intervals along the circumferential direction of the first exhaust pipe.

In one embodiment, the rain-proof hood comprises two second exhaust pipes which are opposite to each other and are obliquely communicated with the connecting joint.

In one embodiment, an insect-proof filter screen is arranged in each second exhaust pipe.

In one embodiment, the inner wall of the top of the connecting joint is provided with a guide inclined surface or a guide cambered surface which extends towards each second exhaust pipe.

In one embodiment, the outer wall of the top of the connecting joint is provided with a diversion inclined plane or a diversion cambered surface respectively.

In one embodiment, an end of the second exhaust pipe far away from the connecting joint is coaxially provided with an arc-shaped baffle plate.

In one embodiment, the connection joint, the first exhaust pipe, the second exhaust pipe and the arc-shaped baffle are all made of polypropylene.

In one embodiment, the axial direction of the first exhaust pipe and the axial direction of the second exhaust pipe form an included angle of 60 degrees.

The rain-proof hood provided by the utility model has the beneficial effects that the first exhaust pipe is respectively communicated with the exhaust chimney and the connecting joint along the vertical direction, and the second exhaust pipe is obliquely communicated with the connecting joint and forms an included angle of 45-75 degrees with the first exhaust pipe, so that tail gas exhausted by the exhaust chimney can be exhausted by the second exhaust pipe after passing through the first exhaust pipe and the connecting joint, and because the second exhaust pipe is downwards inclined at a certain angle along the vertical direction, external rainwater is difficult to enter the exhaust chimney through the second exhaust pipe, even if a small amount of rainwater is blown into the second exhaust pipe, the rainwater flows out of the second exhaust pipe under the influence of self gravity, and the condition that the rainwater flows backward in the exhaust chimney is effectively prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a rain cap according to the prior art;

FIG. 2 is a schematic view of another rain cap according to the prior art;

fig. 3 is a schematic view of a rain cap according to an embodiment of the present utility model.

In the figure: 10. an air outlet; 20. a rain-proof hood; 100. a connection joint; 200. a first exhaust duct; 300. a second exhaust duct; 310. insect prevention filter screen; 400. an arc baffle.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model 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 for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be 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 be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 3, a description will now be given of a rain cap 20 according to an embodiment of the present utility model, where the rain cap 20 is used to prevent rainwater from flowing backward into an exhaust chimney of a laboratory during rainfall, and the rain cap 20 specifically includes: the connection joint 100, the first exhaust pipe 200 and the second exhaust pipe 300 take the view angle in fig. 3 as an example, the top of the connection joint 100 is sealed, the first exhaust pipe 200 is arranged along the vertical direction, one end of the first exhaust pipe 200 is communicated with the bottom of the connection joint 100, the other end of the first exhaust pipe is communicated with the air outlet of the exhaust chimney, the second exhaust pipe 300 is obliquely communicated with the side wall of the connection joint 100 along the horizontal direction, and an included angle alpha between the axial direction of the second exhaust pipe 300 and the axial direction of the first exhaust pipe 200 is 45-75 degrees.

The rain cap 20 has the following advantages: the top of the connecting joint 100 is sealed, the bottom of the connecting joint is communicated with the first exhaust pipe 200, the second exhaust pipe 300 is obliquely communicated with the connecting joint 100, and an included angle alpha of 45-75 degrees is formed between the second exhaust pipe 300 and the first exhaust pipe 200 along the axial direction, so that when exhaust gas exhausted from an exhaust chimney is exhausted through the first exhaust pipe 200 and the second exhaust pipe 300, the exhaust efficiency of the exhaust chimney is not affected by larger resistance, meanwhile, external rainwater is difficult to enter the second exhaust pipe 300, even if a small amount of rainwater is blown into the second exhaust pipe 300 under the condition of strong wind, the inclined angle of the second exhaust pipe 300 is limited, and finally the exhaust chimney flows out of the second exhaust pipe 300 due to the influence of gravity of the second exhaust pipe 300, thereby solving the problem that the exhaust chimney is easy to flow backward due to the rainwater in the rainy period and the condition of the strong wind.

It should be noted that, the dimensions of the connection joint 100, the first exhaust duct 200 and the second exhaust duct 300 generally adapt to the sizes of the corresponding exhaust stacks, and in the practical application process, the connection joint 100, the first exhaust duct 200 and the second exhaust duct 300 can be customized according to the sizes of the exhaust stacks.

Further, in this embodiment, the rain cap 20 includes a plurality of second exhaust pipes 300, and each second exhaust pipe 300 is obliquely connected to the side wall of the connection joint 100 at equal intervals along the circumferential direction of the first exhaust pipe 200, so as to avoid the influence of the rain cap 20 on the exhaust performance of the exhaust chimney from being greatly influenced; specifically, in this embodiment, the rain cap 20 includes two second exhaust pipes 300 disposed opposite to each other at intervals and respectively connected to the connection joint 100 in an inclined manner, and an included angle α between the axial direction of each second exhaust pipe 300 and the axial direction of the first exhaust pipe 200 is 60 °, so that the rain cap 20 achieves a better balance between the air exhaust effect and the rain protection effect.

Further, in the present embodiment, the inner wall of the top of the connector 100 has guiding inclined planes extending toward each second exhaust duct 300, so as to reduce the resistance of the exhaust gas during the process of entering the second exhaust duct 300 from the first exhaust duct 200, and prevent the exhaust effect of the exhaust chimney from being affected; in other embodiments, the guiding ramp may be replaced with a guiding ramp.

Further, in the present embodiment, the outer wall of the top of the connection joint 100 has a diversion slope inclined downward in the vertical direction, so as to avoid rainwater from accumulating on the top of the connection joint 100; in other embodiments, the above-described diversion ramp may be replaced with a diversion cambered surface.

Further, in the present embodiment, the insect-proof filter screen 310 is disposed in each of the second exhaust pipes 300, and the end of each of the second exhaust pipes 300 far from the connection joint 100 is coaxially provided with the arc-shaped baffle 400, so that the external air flow can be prevented from blowing into the second exhaust pipe 300 while the rainwater is prevented from blowing into the second exhaust pipe 300, and the exhaust effect of the exhaust chimney is prevented from being affected.

Specifically, in the present embodiment, the connection joint 100, the first exhaust duct 200, and the second exhaust duct 300 are integrally formed, and the connection joint 100, the first exhaust duct 200, the second exhaust duct 300, and the arc-shaped baffle 400 are all made of polypropylene, so that the rain-proof hood 20 is prevented from being corroded by acid rain in a long-term use process.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (9)

1. The utility model provides a rain-proof hood for prevent that rainwater from flowing backward and getting into in the chimney of airing exhaust, its characterized in that includes attach fitting, first exhaust pipe and second exhaust pipe, attach fitting's top seals the setting, first exhaust pipe along vertical direction respectively with the chimney of airing exhaust reaches attach fitting's bottom intercommunication, the second exhaust pipe slope communicate in on attach fitting's the lateral wall, and with first exhaust pipe forms 45-75 contained angle.

2. The rain cap of claim 1, wherein the rain cap comprises a plurality of the second exhaust ducts, each of the second exhaust ducts being connected to the side wall of the connection terminal at regular intervals in the circumferential direction of the first exhaust duct.

3. The rain cap of claim 2, wherein said rain cap comprises two of said second exhaust ducts facing each other and in oblique communication with said connector.

4. The rain cap of claim 2, wherein an insect screen is disposed within each of the second exhaust ducts.

5. A rain cap according to claim 2, wherein the inner wall of the top of the connection joint is provided with a guiding inclined surface or a guiding cambered surface extending towards each of the second exhaust ducts.

6. The rain cap according to claim 5, wherein the top outer wall of the connecting joint is provided with a diversion slope or a diversion cambered surface.

7. The rain cap according to any one of claims 1-6, wherein an end of the second exhaust duct remote from the connection joint is coaxially provided with an arc-shaped baffle.

8. The rain cap of claim 7, wherein the connector, the first exhaust duct, the second exhaust duct, and the arcuate baffle are all polypropylene.

9. The storm hood of any of claims 1-6 wherein an axial direction of said first exhaust duct is at an angle of 60 ° to an axial direction of said second exhaust duct.