CN217582384U

CN217582384U - Hood of manhole cover

Info

Publication number: CN217582384U
Application number: CN202222050064.5U
Authority: CN
Inventors: 解志禹; 邹杰
Original assignee: Jiangsu Beifu New Material Technology Co ltd
Current assignee: Jiangsu Beifu New Material Technology Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-10-14
Anticipated expiration: 2032-08-05

Abstract

The utility model discloses a hood of a manhole cover, which comprises a ventilation screen, a waterproof component and a base flange; the ventilation net cover is of a hollow columnar structure with a closed top end and an outward turned bottom end and is provided with a plurality of rows of ventilation holes; the waterproof assembly is positioned inside the ventilation mesh enclosure and comprises a ventilation pipe and a water baffle surrounding the ventilation pipe. Air in the manhole cover enters the ventilation pipe, bypasses the water baffle, flows downwards along a gap between the ventilation net cover and the ventilation pipe, is discharged outside through the ventilation hole, takes away heat in the equipment and plays a role in heat dissipation; because the height of the vent hole is lower than that of the water baffle, rainwater cannot bypass the water baffle to enter the ventilation pipe, and therefore the purpose of rain prevention is achieved. The utility model discloses realized ventilation and rain-proof function with simpler structure and technology, not only further reduced manufacturing cost, overcome the difficult discharged problem of bad weather intaking and ponding moreover.

Description

Hood of manhole cover

Technical Field

The utility model belongs to the technical field of wind power generation technique and specifically relates to a hood of aerogenerator manhole cover is related to.

Background

In order to facilitate maintenance, a manhole through which maintenance personnel can come in and go out is often provided in wind power generation equipment installed outdoors. When maintenance personnel perform maintenance work inside the manhole, the manhole cover is usually covered. In order to maintain ventilation and heat dissipation inside the manhole, a hood with a vent hole is generally provided on the manhole cover. However, since it often rains in an outdoor environment, the hood must have a rain-proof function as well as a ventilation function.

A rain-proof hood (CN 210717945U) discloses a rain-proof hood, which uses an umbrella-shaped structure to block rain water, but the whole structure is not simple enough, and the manufacturing process and the cost are high; in severe weather such as heavy rain, rainwater still splashes into the waterproof baffle, so that a water inlet phenomenon occurs; moreover, rainwater is not easy to be discharged after splashing into the interior of the waterproof baffle, so that great potential safety hazards are caused to the interior of the equipment.

SUMMERY OF THE UTILITY MODEL

The above-mentioned problem to prior art exists, the utility model provides a hood of manhole cover realizes ventilating and rain-proof function with simpler structure and technology, has not only further reduced manufacturing cost, has overcome the difficult discharged problem of bad weather intaking and ponding moreover.

The technical scheme of the utility model as follows:

a blast cap of a manhole cover comprises a ventilation mesh enclosure, a waterproof assembly and a base flange;

the ventilation net cover is of a hollow columnar structure with a sealed top end and an outward turned bottom end, and sequentially comprises a top cover, a hollow columnar side wall and an inverted pi-shaped flange edge formed by the side wall from top to bottom;

the upper edge of the side wall surrounds the top cover for a circle; a plurality of rows of vent holes are formed in the side wall;

the flange edge is an annular plate, and the inner ring of the flange edge is connected with the lower edge of the side wall;

the base flange is an annular plate positioned at the bottom of the flange edge, and the base flange is connected with the flange edge through bolts;

the waterproof assembly is positioned in the ventilation mesh enclosure 1 and comprises a ventilation pipe and a water baffle plate surrounding the ventilation pipe for one circle;

the ventilation pipe is of a hollow columnar structure, the lower edge of the ventilation pipe is positioned on the base flange, the height of the ventilation pipe is less than that of the side wall, the radius of the ventilation pipe is less than that of the side wall, and the ventilation pipe is not connected with the top cover and the side wall;

the water baffle is of an annular plate structure, is positioned at the position close to the upper part of the outer wall of the ventilating pipe, has an outer radius smaller than that of the side wall, and is not connected with the side wall.

Preferably, the outward angle of the opening formed by the connection of the side wall and the flange edge is an obtuse angle.

Preferably, the lower edge of the ventilation pipe of the waterproof assembly is connected to the base flange through welding, and the central axes of the ventilation pipe and the central axis of the base flange are coincident.

Preferably, the plane where the base flange is located is the lowest point, and the setting height of the vent hole is lower than the height of the water baffle.

Preferably, the top cover and the side wall are in transitional connection through an arc-shaped plate.

More preferably, a gap for draining water is reserved between the flange edge and the base flange.

The utility model discloses profitable technological effect lies in:

(1) The outside of the blast cap is improved to be only provided with the vent holes and the shape inclination is increased, namely, the angle between the side wall and the flange edge is slightly larger than 90 degrees, and the side wall is of a circular truncated cone structure with slightly smaller upper radius and slightly larger bottom radius. The inclination structure can better connect the internal and external air flows of the equipment, enlarge the heat dissipation area and facilitate the volatilization of heat in the manhole.

(2) The water baffle is additionally arranged in the ventilation net cover, so that even if rainwater splashes into the interior of the hood, the rainwater can be blocked by the water baffle.

(3) Under bad weather such as torrential rain, the ventilation hole can play the drainage function, the condition that waterproof baffle is submerged by water can not appear.

(4) In the comparison document, rainwater cannot be discharged after splashing into the water baffle to form accumulated water, so that great hidden danger is caused to an air cap and other equipment; the utility model discloses with the breakwater setting in the inside in ventilation hole, thoroughly eliminated this hidden danger.

(5) Two curved surface parts in the comparison file are changed into cylindrical parts with simpler structures, the structures are simpler, the process is simpler, and the cost is reduced by about 30 percent.

Drawings

FIG. 1 is a block diagram of a ventilation hood;

FIG. 2 is a block diagram of a waterproof assembly;

fig. 3 is a cross-sectional view of the present invention;

in the drawings, the corresponding relationship between the component names and the reference numbers is as follows: 1. a ventilation net cover; 2. a waterproof assembly; 3. a base flange; 4. a top cover; 5. a side wall; 6. a flange edge; 7. a water baffle; 8. a vent pipe; 9. a vent hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The manhole cover hood of the embodiment is composed of a ventilation mesh enclosure 1, a waterproof assembly 2 and a base flange 3, and the structure is shown in fig. 1-3.

As shown in figure 1, the ventilation net cover 1 is a Chinese character transverse folding structure

The structure formed by rotating around the central shaft is encircled into a hollow column shape with a sealed top end and an outward turned bottom end and is divided into a top cover 4, a side wall 5 and a flange edge 6;

wherein the top cover 4 is a plane thin plate circular structure and is vertical to the central shaft;

the side wall 5 is of a thin-wall circular truncated cone structure, the circular truncated cone is hollow, and the radius of the upper bottom surface of the circular truncated cone is larger than that of the lower bottom surface; the side wall 5 is provided with 3 rows of vent holes 9;

the flange edge 6 is of a circular thin plate structure and is perpendicular to the central shaft; the flange edge 6 is provided with a plurality of mounting holes which are respectively in one-to-one correspondence with the mounting holes on the base flange 3;

the top cover 4 and the side wall 5 are in transitional connection by using a section of circular arc; the side wall 5 and the flange edge 6 are in transition connection by using a round angle. The side wall 5 and the flange 6 form an inverted pi-shape.

Further, because the radius of the upper bottom surface of the truncated cone of the side wall 5 is greater than that of the lower bottom surface, the outward-opening angle of the lower end of the side wall 5 is an obtuse angle slightly greater than 90 degrees after the lower end of the side wall 5 is connected with the flange edge 6. This obtuse angle is formed by the effect of the stretching of the boss during the preparation of the circular truncated cone.

As shown in fig. 2 and 3, the waterproof module 2 is composed of a ventilation pipe 8 and a water guard plate 7. The ventilation pipe 8 is of a thin-wall cylindrical structure, the central axis of the ventilation pipe is superposed with the central axis of the ventilation net cover 1, the height of the ventilation pipe is less than that of the side wall 5 of the ventilation net cover 1, and the radius of the ventilation pipe is less than that of the side wall 5 of the ventilation net cover 1; namely, the ventilation pipe 8 is not connected with the top cover 4 and the side wall 5;

the water baffle 7 is of a circular thin plate structure, is perpendicular to the central axis of the ventilation pipe 8, and the radius of the outer ring of the water baffle 7 is smaller than that of the side wall 5 of the ventilation net cover 1, namely the water baffle 7 is not connected with the side wall 5; the ventilating pipe 8 is nested inside the water baffle 7, or the water baffle 7 is positioned on the upper part of the outer wall of the ventilating pipe 8, and the ventilating pipe 8 and the water baffle are connected through welding. The height of the highest one of the three rows of ventilation holes 9 is lower than that of the water baffle 7, so that rainwater can be blocked.

As shown in fig. 3, the waterproof assembly 2 is connected to the base flange 3 by welding, and the central axes of the two are coincident; the ventilation hood 1 is connected to the base flange 3 by means of a connecting element, preferably with a gap for drainage between the two.

The working principle of the embodiment is as follows:

air inside the manhole cover enters the ventilation pipe 8, bypasses the water baffle 7, flows downwards along a gap between the ventilation mesh enclosure 1 and the ventilation pipe 8, is discharged outside through the ventilation hole 9, and accordingly takes away heat inside the device and plays a role in heat dissipation.

Meanwhile, the external air can also flow into the ventilation mesh enclosure 1 through the ventilation holes 9, flow upwards along the gap between the ventilation mesh enclosure 1 and the ventilation pipe 8, bypass the water baffle 7, flow into the ventilation pipe 8 and the side wall 5, and play a role in ventilation.

Because the height of the vent hole 9 is lower than that of the water baffle 7, rainwater can splash into the ventilation mesh enclosure 1 from the vent hole 9, but cannot bypass the water baffle 7 to enter the ventilation pipe 8, so that the rainproof purpose is achieved; if too much rain water is splashed in bad weather, the rain water is directly discharged from the ventilation holes 9.

Although the embodiments of the present invention have been disclosed in the foregoing description, it should be understood that the invention is not limited to the details of construction and arrangements of the embodiments, but is capable of numerous changes, modifications, substitutions and alterations by one of ordinary skill in the art without departing from the principles and spirit of the invention.

Claims

1. A hood of a manhole cover is characterized in that: comprises a ventilation net cover (1), a waterproof component (2) and a base flange (3);

the ventilation net cover (1) is of a hollow columnar structure with a closed top end and an outward turned bottom end, and sequentially comprises a top cover (4), a hollow columnar side wall (5) and an inverted pi-shaped flange edge (6) formed by the side wall (5) from top to bottom;

the upper edge of the side wall (5) surrounds the top cover (4) for a circle; a plurality of rows of vent holes (9) are formed in the side wall (5);

the flange edge (6) is an annular plate, and the inner ring of the flange edge is connected with the lower edge of the side wall (5);

the base flange (3) is an annular plate positioned at the bottom of the flange edge (6), and the base flange (3) is connected with the flange edge (6) through bolts;

the waterproof assembly (2) is positioned in the ventilation mesh enclosure (1) and comprises a ventilation pipe (8) and a water baffle (7) surrounding the ventilation pipe in a circle;

the ventilation pipe (8) is of a hollow columnar structure, the lower edge of the ventilation pipe is positioned on the base flange (3), the height of the ventilation pipe is less than that of the side wall (5), the radius of the ventilation pipe is less than that of the side wall (5), and the ventilation pipe is not connected with the top cover (4) and the side wall (5);

the water baffle (7) is of an annular plate structure, is positioned at the position close to the upper part of the outer wall of the ventilation pipe (8), has an outer radius smaller than that of the side wall (5), and is not connected with the side wall (5).

2. A hood for a manhole cover according to claim 1, wherein: the outward angle of the opening formed by connecting the side wall (5) and the flange edge (6) is an obtuse angle.

3. The blast cap of a manhole cover according to claim 1, wherein: the lower edge of a ventilation pipe (8) of the waterproof assembly (2) is connected to the base flange (3) through welding, and the central axes of the ventilation pipe and the base flange coincide.

4. The blast cap of a manhole cover according to claim 1, wherein: the arrangement height of the ventilation holes (9) is lower than that of the water baffle (7).

5. The blast cap of a manhole cover according to claim 1, wherein: the top cover (4) and the side wall (5) are in transitional connection through an arc-shaped plate.