CN219638318U

CN219638318U - Rainproof hood

Info

Publication number: CN219638318U
Application number: CN202321334403.0U
Authority: CN
Inventors: 蔡鹏娟; 伍琛; 白洪海; 万峰
Original assignee: Centre Testing International Group Co ltd
Current assignee: Centre Testing International Group Co ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-09-05
Anticipated expiration: 2033-05-29

Abstract

The utility model provides a rain-proof hood, which comprises a connecting pipe body, an exhaust pipe body and a rain-proof hood body, wherein the connecting pipe body comprises a column body and a cone body, the direction of the column body facing the cone body is a first direction, the pipe diameter of the cone body is gradually reduced along the first direction, the column body is communicated with an exhaust chimney, one end of the column body adjacent to the cone body and the cone body extend into a cavity, a first guide part and a second guide part which are tapered are sequentially formed in the cavity along the first direction, the inner diameter of the first guide part is gradually reduced along the first direction, the inner diameter of the second guide part is gradually enlarged, the first guide part is arranged at intervals around the cone body, a gap is formed between the first guide part and the outer wall of the cone body, an air inlet gap communicated with the gap is formed on the outer wall of the rain-proof hood body, one side of the exhaust pipe body far away from the first guide part is communicated with the cavity, and an included angle between the exhaust pipe body and the column body is 45-75 degrees, so that the rain-proof capability and the exhaust capability of the rain-proof hood body are improved.

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 in the laboratory can be provided with a rain-proof hood which is communicated with the outside, so that the treated tail gas can be discharged outside the laboratory through the rain-proof hood, and external rainwater can be prevented from flowing backwards into the exhaust chimney, so that laboratory equipment is failed, and even short circuit is burnt.

Most of the rain-proof hoods on the market are relatively simple in structure, so that the rain-proof function is limited, particularly during the period of rainfall accompanied by strong wind, rainwater can still enter the rain-proof hood under the influence of wind power, and then flows backward into an exhaust chimney, so that the normal use of a laboratory is influenced.

Disclosure of Invention

The utility model aims to provide a rainproof hood, and aims to solve the problem that the existing rainproof hood can reduce exhaust efficiency while improving rainproof effect.

In order to achieve the above object, the present utility model provides a rain-proof hood for preventing rainwater from flowing backward into an exhaust chimney, including a connection pipe body, an exhaust pipe body, and a rain-proof hood body having a cavity, where the connection pipe body includes a cylindrical body portion and a cone portion coaxially connected to one end of the cylindrical body portion, the direction of the cylindrical body portion toward the cone portion is taken as a first direction, the diameter of the cone portion is gradually reduced along the first direction, one end of the cylindrical body portion far away from the cone portion is communicated with the exhaust chimney, one end of the cylindrical body portion adjacent to the cone portion and the cone portion extend into a cavity of the rain-proof hood body, the cavity is sequentially formed with a first guide portion and a second guide portion which are tapered along the first direction, the inner diameter of the first guide portion is gradually reduced, the inner diameter of the second guide portion is gradually enlarged, the first guide portion is arranged around the cone portion at intervals, and forms a gap with an outer wall of the cone portion, the outer wall of the rain-proof hood body is provided with a plurality of air inlet notches communicated with the gap, and the outer wall of the cone portion covers the gaps along the cylindrical body portion, the radial direction, one end of the cylindrical body portion adjacent to the cone portion extends into the cavity of the rain-proof hood body, the cavity is arranged on the first guide portion, and the inner diameter of the air inlet cap is axially opposite to one side of the air inlet cap is arranged on the second guide portion, and is axially opposite to one side of the air inlet cap 45, and is far away from the first guide portion, and 45, and is opposite to one side of the air inlet air gap, and is arranged

In one embodiment, the air inlet notches are equally spaced circumferentially about the cylindrical portion.

In one embodiment, the taper of the cone portion is the same as the taper of the first guide portion.

In one embodiment, the rain-proof hood further comprises an insect-proof filter screen detachably mounted in one end of the cone portion away from the column portion, and one end of the column portion adjacent to the cone portion is detachably connected with the inner wall of the cavity.

In one embodiment, the insect-proof filter screen comprises a filter screen main body and an annular frame which is arranged around the periphery of the filter screen main body, wherein the annular frame is provided with a plurality of first guide grooves which extend along the axial direction of the column part, the first guide grooves are distributed at equal intervals along the circumferential direction of the column part, the inner wall of the cone part is provided with a ring table which extends along the circumferential direction of the column part and is used for supporting the annular frame, and the ring table is provided with a plurality of guide plates which are used for penetrating through the first guide grooves one by one;

the outer wall of the cylinder part is provided with a plurality of second guide grooves extending along the axial direction of the cylinder part, and locking grooves which are respectively communicated with one end of each second guide groove far away from the cone part and extend along the axial direction of the cylinder part, the first guide grooves and the locking grooves are uniformly distributed at intervals along the circumferential direction of the cylinder part, and the inner wall of the cavity is provided with a plurality of locking pieces which are used for penetrating through the second guide grooves and the corresponding locking grooves.

In one embodiment, the rain-proof hood comprises a plurality of exhaust pipe bodies, and the exhaust pipe bodies are arranged on the rain-proof hood body at equal intervals along the circumferential direction of the column part.

In one embodiment, the cavity is further provided with a third guide part along the axial direction of the column body and opposite to the inner wall of the cone body, and the third guide parts are arc-shaped and extend in directions towards the exhaust pipe bodies respectively.

In one embodiment, the included angle between the axial direction of the exhaust pipe body and the axial direction of the cylinder part is 60 DEG

The rain-proof hood has the beneficial effects that in the rain-proof hood, the exhaust pipe body is communicated with the connecting column body through the rain-proof hood body, the included angle between the axial direction of the exhaust pipe body and the axial direction of the connecting column body is set to be 45-75 degrees, the column body in the connecting column body is communicated with the exhaust chimney, and the exhaust gas exhausted from the exhaust chimney can be exhausted outside a laboratory through the connecting column body and the rain-proof hood body and then is exhausted from the exhaust pipe body, but external rainwater is difficult to flow back into the exhaust pipe body and then flows back into the exhaust chimney, so that the rain-proof capability of the rain-proof hood is effectively improved, in addition, the caliber of the cone body in the connecting column body is gradually reduced along the first direction, the caliber of the second guide part in the cavity is gradually enlarged along the first direction, so that the flow rate of the exhaust gas in the rain-proof hood is further improved in the process of the cone body through the cone body and the second guide part, and the exhaust gas can flow out of the rain-proof hood along with the same direction, and the rain-proof hood can be further improved.

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 semi-sectional structure of a rain cap according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an insect-proof filter screen in the rain cap shown in FIG. 1;

FIG. 3 is a schematic view of a platform structure in the rain cap shown in FIG. 1;

FIG. 4 is a schematic diagram of a connection structure between an insect-proof filter screen and a ring table in the rain-proof hood shown in FIG. 1;

fig. 5 is a schematic view of a part of the structure of the rain cap shown in fig. 1 when the rain cap body is separated from the connecting pipe body.

In the figure: 10. a rain-proof hood; 100. a connection pipe body; 110. a column portion; 111. a second guide groove; 112. a locking groove; 120. a vertebral body; 122. a ring table; 124. a guide plate; 200. a rain-proof cap body; 201. a cavity; 202. a first guide part; 203. a second guide part; 204. a third guide part; 205. a slit; 206. an air inlet notch; 210. a locking member; 300. an exhaust pipe body; 400. insect prevention filter screen; 410. a filter screen body; 420. an annular frame; 425. a first guide groove.

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. 1, a rain cap 10 according to an embodiment of the present utility model will be described, where the rain cap 10 is disposed on an outdoor end of an exhaust chimney and is used to prevent outdoor rainwater from flowing backward into the exhaust chimney, and the rain cap 10 specifically includes: the connecting pipe body 100, the waterproof cap body 200 and the exhaust pipe body 300, wherein the connecting pipe body 100 comprises a column body 110 and a cone body 120 coaxially connected to one end of the column body 110, the direction of the column body 110 towards the cone body 120 in the axial direction is taken as a first direction M, the pipe diameter of the cone body 120 is gradually reduced along the first direction M, one end of the column body 110 far away from the cone body 120 is communicated with an exhaust chimney, one end of the column body 110 adjacent to the cone body 120 and the cone body 120 extend into a cavity 201 formed in the waterproof cap body 200, the cavity 201 is sequentially provided with a first guide part 202 and a second guide part 203 which are tapered along the first direction M, the inner diameter of the first guide part 202 is gradually reduced along the first direction M, the inner diameter of the second guide part 203 is gradually enlarged along the first direction M, the first guide part 202 is circumferentially arranged on the periphery of the cone body 120 at intervals, and form gap 205 with the outer wall of cone 120, the outer wall of rain-proof cap body 200 has still offered a plurality of air inlet gap 206 with gap 205 intercommunication, and cone 120 radially covers each air inlet gap 206 along cylinder 110, thereby prevent outside rainwater to enter into cone 120 through air inlet gap 206, exhaust pipe 300 sets up on rain-proof cap body 200 and in second guide 203 one side that keeps away from first guide 202 with cavity 201 intercommunication, so, make the exhaust gas that gets into gap 205 from cone 120 and the outside air current that gets into by air inlet gap 206 can be discharged from exhaust pipe 300 again after passing through second guide 203 together, and the contained angle between the axial of exhaust pipe 300 and the axial of cylinder 110 is 45-75, thereby prevent outside rainwater to get into exhaust pipe 300, finally, flow backward and get into exhaust chimney.

The rain-proof hood 10 has the beneficial effects that: the connecting pipe body 100 is communicated with the exhaust chimney along the vertical direction, the exhaust pipe body 300 is communicated with one end of the connecting pipe body 100 far away from the exhaust chimney through the rain cap body 200, and the included angle between the axial direction of the exhaust pipe body 300 and the axial direction of the connecting pipe body 100 is set to be 45 degrees to 75 degrees, so that the tail gas exhausted by the exhaust chimney is exhausted outdoors through the exhaust pipe body 300, and external rainwater is difficult to enter the exhaust pipe body 300 and then flows back into the exhaust chimney, namely the integral rain-proof capacity of the rain-proof cap 10 is effectively improved, besides, the cone 120 in the connecting pipe body 100 is gradually reduced in caliber along the first direction M, the first guide part 202 and the second guide part 203 which are distributed along the first direction M are arranged in the cavity 201 of the rain cap body 200, the first guide part 202 is gradually reduced along the inner diameter along the first direction M and is circumferentially arranged on the cone 120 to form a gap 205, the exhaust duct 300 is communicated with the cavity 201 at one side of the second guiding portion 203 far from the first guiding portion 202, so that the exhaust gas discharged from the cone portion 120 can be discharged from the exhaust duct 300 after passing through at least the second guiding portion 203, and as the caliber of the second guiding portion 203 along the first aspect M is gradually enlarged, a negative pressure environment is formed in the process of the exhaust gas passing through the cone portion 120 and the second guiding portion 203 and finally being discharged from the exhaust duct 300 from the column portion 110, so as to further increase the flow velocity of the exhaust gas, accelerate the exhaust gas to be discharged from the rain hat 10, and the external air flow can also enter the gap 205 from the air inlet notch 206 formed on the rain hat body 200 and finally be discharged from the exhaust duct 300 together with the exhaust gas, thereby increasing the air flow in the rain hat body 200, further improving the exhaust effect of the rain hat 10, so that when the rain-proof capability of the rain hat 10 can be re-improved, and the exhaust effect can be better considered.

Preferably, in a specific embodiment, the angle between the axial direction of the exhaust pipe 300 and the axial direction of the cylinder 110 is 60 °, so that external rainwater is difficult to enter the exhaust pipe 300, and the influence of the arrangement of the acute angle between the exhaust pipe 300 and the cylinder 110 on the exhaust effect of the rain cap 10 is reduced.

Further, in this embodiment, the taper of the cone 120 is the same as that of the first guiding portion 202, and the air inlet notches 206 are equally spaced along the circumference of the cylinder 110, so that the external air flow can uniformly enter the slit 205 through the air inlet notches 206 and further enter the second guiding portion 203.

Further, in the present embodiment, the rain hat 10 includes a plurality of exhaust pipes 300, each of which is arranged on the rain hat body 200 at equal intervals along the circumferential direction of the column portion 110, and is connected to the cavity 201 at a side of the second guiding portion 203 away from the first guiding portion 202, so as to improve the exhaust efficiency of the rain hat body 200. In this embodiment, the rain cap 10 includes two exhaust pipes 300 disposed at equal intervals along the circumference of the pillar 110.

Further, in the present embodiment, the cavity 201 is further provided with a third guiding portion 204 along the axial direction of the cylindrical portion 110 and opposite to the inner wall of the cone portion 120, and the third guiding portion 204 is arc-shaped and extends along the axial direction toward each exhaust pipe 300, so as to smoothly guide the exhaust gas passing through the second guiding portion 203 into each exhaust pipe 300 for being discharged.

Further, the rain-proof hood 10 further includes a protection filter 400, the protection filter 400 is detachably mounted in the end of the cone 120 away from the column 110, for preventing external mosquitoes or large particles of dust from entering the exhaust chimney, and the end of the column 110 adjacent to the cone 120 is detachably connected with the inner wall of the cavity 201, so that the rain-proof hood 200 can be detached from the connecting pipe 100 during long-term use of the rain-proof hood 10, so that the protection filter 400 can be conveniently cleaned or replaced, and the protection filter 400 is prevented from being blocked.

Specifically, referring to fig. 2-5, in this embodiment, the insect-proof filter 400 includes a filter main body 410 and an annular frame 420 surrounding the outer periphery of the filter main body 410, wherein the annular frame 420 is provided with a plurality of first guide grooves 425 extending along the axial direction of the column portion 110, the first guide grooves 425 are equally spaced along the circumferential direction of the column portion 110, the inner wall of the cone portion 120 is correspondingly provided with a ring table 122 extending along the circumferential direction of the column portion 110 and used for supporting the annular frame 420, and the ring table 122 is provided with a plurality of guide plates 124 penetrating through the first guide grooves 425 one by one along the axial direction of the column portion 110, so that the annular frame 420 can be axially mounted on the ring table 122 along the column portion 110 or axially detached from the ring table 122 along the column portion 110.

Further, the outer wall of the column 110 is provided with a plurality of second guiding grooves 111 extending along the axial direction thereof and a plurality of locking grooves 112 which are communicated with one another one by one at one, far from one end of the second guiding grooves 111 from the cone 120, and extend along the circumferential direction of the column 110, each second guiding groove 111 and each locking groove 112 are arranged at equal intervals along the circumferential direction of the column 110, the inner wall of the cavity 201 is correspondingly provided with a plurality of locking pieces 210 which are used for penetrating one by one through the second guiding grooves 111 and the corresponding locking grooves 112, so that the rain cap 200 can be pushed along the axial direction of the column 110, each locking piece 210 on the inner wall of the cavity 201 moves to the end, far from the cone 120, of each second guiding groove 111 along the axial direction of the column 110, and then the rain cap 200 is positively rotated, so that the locking pieces 210 enter the corresponding locking grooves 112, thereby realizing the fixation between the rain cap 200 and the connecting pipe 100.

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

1. The utility model provides a rain-proof hood for prevent that rainwater from flowing backward from getting into in the chimney of airing exhaust, its characterized in that includes connecting pipe body, blast pipe body and has the rain-proof hood body of cavity, connecting pipe body include cylinder portion and coaxial coupling in the cone portion of cylinder portion one end, with the cylinder portion orientation in the direction of cone portion is first direction, the pipe diameter of cone portion is followed the first direction reduces gradually, just the cylinder portion keep away from in the one end of cone portion with the chimney intercommunication of airing exhaust, the cylinder portion be adjacent in the one end of cone portion with cone portion stretches into together in the cavity of rain-proof hood body, the cavity is followed first direction is formed with first guiding portion and the second guiding portion that all is the toper in proper order, and follows the first direction, the internal diameter of first guiding portion reduces gradually, the internal diameter of second guiding portion enlarges gradually, first guiding portion interval is located cone portion, and form the gap between the outer wall of cone portion, the cylinder portion be adjacent to the cone portion with cone portion one end stretches into together with the cavity is located in the axial direction of blast pipe 75 with the outer wall of cone portion is located in the radial gap is kept away from in between the blast pipe body and the radial gap is located in the radial gap is located between the upper side of the blast pipe body and the air inlet.

2. The rain cap of claim 1, wherein each of the air inlet notches is equally spaced circumferentially about the post.

3. The storm cap of claim 1 wherein said taper of said cone portion is the same as said taper of said first guide portion.

4. The rain cap of claim 1, further comprising an insect screen removably mounted in an end of the cone portion remote from the cylinder portion, and wherein an end of the cylinder portion adjacent to the cone portion is removably connected to an inner wall of the cavity.

5. The rain-proof hood according to claim 4, wherein the insect-proof filter screen comprises a filter screen main body and an annular frame surrounding the periphery of the filter screen main body, the annular frame is provided with a plurality of first guide grooves extending along the axial direction of the column part, the first guide grooves are distributed at equal intervals along the circumferential direction of the column part, the inner wall of the cone part is provided with a ring table extending along the circumferential direction of the column part and used for supporting the annular frame, and the ring table is provided with a plurality of guide plates penetrating through the first guide grooves one by one;

the outer wall of the cylinder part is provided with a plurality of second guide grooves extending along the axial direction of the cylinder part, and locking grooves which are respectively communicated with one end of each second guide groove far away from the cone part and extend along the axial circumference of the cylinder part, the first guide grooves and the locking grooves are uniformly distributed along the circumferential direction of the cylinder part at equal intervals, and the inner wall of the cavity is provided with a plurality of locking pieces which are used for penetrating through the second guide grooves and the corresponding locking grooves.

6. The rain cap according to claim 1, wherein the rain cap comprises a plurality of the exhaust pipe bodies, each of the exhaust pipe bodies being disposed on the rain cap body at equal intervals along the circumferential direction of the column portion.

7. The rain cap according to claim 6, wherein the cavity is further provided with a third guide portion axially opposite to the inner wall of the cone portion along the column portion, and the third guide portion is arc-shaped and extends in a direction toward each of the exhaust pipe bodies, respectively.

8. Rain cap according to any of claims 1-7, wherein the angle between the axial direction of the exhaust pipe body and the axial direction of the cylindrical portion is 60 °.