CN219177934U - Upward air exhaust wind pipe rainwater inlet preventing device - Google Patents

Abstract

The utility model provides a rainwater inlet preventing device for an upward exhaust air pipe. The upper cover is positioned at the top end of the exhaust air pipe and comprises two cover plates which are opened in opposite directions, each cover plate is provided with a balancing weight, and the upper cover can be blown open by airflow to be in a nearly vertical direction when exhausting smoke and exhausting air, so that the exhaust of the air and the smoke is facilitated; when the smoke discharging and the wind discharging are stopped, the cover plate is closed by self weight, and rainwater is prevented from entering the wind discharging pipe. When raining and exhausting, the rainwater is blown to the inner wall of the exhaust air pipe under the action of the exhaust air flow, flows downwards along the inner wall of the exhaust air pipe, flows into the annular drainage groove formed by the water baffle and the inner wall of the exhaust air pipe, and flows out of the exhaust air pipe through the water discharge hole. Can prevent rainwater from flowing into the exhaust air pipe along the inner wall of the exhaust air pipe, and can be prevented from flowing backwards into the fan to damage the motor. The hood at the top of the existing exhaust air pipe is omitted, the exhaust resistance of the exhaust air pipe can be reduced, and the energy consumption of an exhaust system is reduced.

Description

Upward air exhaust wind pipe rainwater inlet preventing device

Technical Field

The utility model relates to the technical field of exhaust air and smoke, in particular to a rainwater inlet prevention device for an upward exhaust air pipe.

Background

As is well known, the upward exhaust of the exhaust air pipe is more beneficial to timely diffusing and circulating the air and smoke in the air, and a mode of additionally arranging a rainproof hood at the upper end of the exhaust air pipe is generally adopted to prevent rainwater from entering. However, the wind cap increases the resistance of the exhaust wind, increases the energy consumption, and also generates vibration noise due to continuous impact of the airflow, thereby increasing the noise of the exhaust environment. The air exhaust pipe is directly utilized to exhaust air upwards, rainwater enters the air exhaust pipe, flows back into the fan along the inner wall of the air exhaust pipe, and can cause the problem of water inlet damage of the fan.

Disclosure of Invention

The first object of the present utility model is to provide a rainwater inlet prevention device for an upward exhaust air duct, which can prevent rainwater from entering an exhaust air duct, thereby causing the problem of damage to water inlet of a fan.

The utility model provides a rainwater inlet preventing device for an upward exhaust air pipe, which comprises an upper cover, a water baffle and a water drain hole;

the upper cover comprises two cover plates which are arranged in a split mode and are positioned at the top end of the exhaust air pipe, the lower end of the cover plate is hinged with the exhaust air pipe, and the cover plate is provided with a balancing weight.

The water baffle and the water drain hole are arranged at the bottom of a section of exhaust air pipe at the top end of the exhaust air pipe;

the water baffle is circumferentially arranged on the inner side of the air exhaust air pipe, and an annular drainage groove with an opening at the top end is formed between the water baffle and the air exhaust air pipe;

the water draining hole is arranged on the air exhausting air pipe and is communicated with the annular water tank.

Preferably, the water baffle inclines towards the inner side of the air exhaust air pipe along the air exhaust air flow direction, and the lower side of the water baffle is connected with the bottom of one section of air exhaust air pipe at the top end of the air exhaust air pipe.

Preferably, the water baffle and the inner wall of the exhaust air pipe are sealed by sealant.

Preferably, a plurality of water discharge holes are uniformly distributed along the circumference of the pipe wall of the exhaust air pipe.

Preferably, the arrangement position of the water drain hole is higher than the height of the joint of the water baffle and the air exhaust pipe.

Preferably, the top of the exhaust air pipe is provided with a flange, the two cover plates are symmetrically arranged, and the lower ends of the cover plates are connected with the flange through hinges.

Preferably, a stop block is arranged at the position of the flange corresponding to the cover plate.

Preferably, the lower end of the cover plate is provided with a counterweight rod;

the counterweight rod is arranged on the counterweight rod, and the position of the counterweight relative to the counterweight rod is adjustable.

Preferably, the counterweight rod is provided with threads, and the counterweight is in threaded connection with the counterweight rod.

The beneficial effects are that:

the cover plate can be blown open by airflow during smoke exhaust and air exhaust, so that the smoke and the air can be conveniently exhausted; when the smoke and wind discharge is stopped, the cover plate is closed by self weight, so that rainwater is blocked from entering the wind discharge pipe, namely, when the rain falls and the wind discharge pipe stops discharging smoke and wind, the upper cover is closed, and the rainwater cannot enter the wind discharge pipe. When rainfall and the exhaust air pipe discharges smoke and discharges air, the rainwater entering the exhaust air pipe from the upper end is blown to the inner wall of the exhaust air pipe under the action of exhaust air flow, collected and flows down along the inner wall to enter the annular water tank, and then is discharged to the outside of the exhaust air pipe through the water discharge hole. Prevent rainwater from entering the lower exhaust air pipe and the fan, and cause the damage of the fan. In addition, the hood at the top of the existing exhaust air pipe is omitted, so that the exhaust resistance of the exhaust air pipe can be reduced, and the energy consumption of an exhaust system is reduced.

Drawings

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

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a cross-sectional view of A-A of FIG. 1 in accordance with the present utility model;

FIG. 4 is a cross-sectional view of B-B of FIG. 2 in accordance with the present utility model;

fig. 5 is a cross-sectional view of C-C of fig. 2 in accordance with the present utility model.

Reference numerals illustrate:

1: a water baffle; 2: a water discharge hole; 3: a cover plate; 4: a weight bar; 5: balancing weight; 6: a flange; 7: an exhaust air pipe; 8: a stop block; 9: a hinge; 10: a lock nut; alpha: the baffle forms an included angle with the inner wall of the exhaust air pipe.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present 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 of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The present utility model will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the utility model provides a rainwater inlet prevention device for an upward exhaust air pipe, which comprises an upper cover, a water baffle plate 1 and a water drain hole 2.

The upper cover is located the tuber pipe of airing exhaust top, and it includes two apron 3 that are folio, and the lower extreme of apron 3 is articulated with the tuber pipe of airing exhaust, and apron 3 is provided with balancing weight 5.

The water baffle 1 and the water drain hole 2 are arranged at the bottom of a section of air exhaust air pipe at the top end of the air exhaust air pipe. The breakwater 1 is circumferentially arranged on the inner side of the exhaust air pipe, an annular drainage groove with an open top is formed between the breakwater 1 and the exhaust air pipe, the water discharge hole 2 is formed in the exhaust air pipe, and the drainage hole 2 is communicated with the annular water groove.

When the smoke is discharged and the air is exhausted, the cover plate 3 can be blown away by airflow, so that the smoke is conveniently discharged; when the smoke and wind discharge is stopped, the cover plate 3 is closed by self weight, so that rainwater is blocked from entering the wind discharge pipe, namely, when the rain falls and the wind discharge pipe stops the smoke and wind discharge, the upper cover is closed, and the rainwater cannot enter the wind discharge pipe. When rainfall and the exhaust air pipe discharges smoke and discharges air, the rainwater entering the exhaust air pipe from the upper end is blown to the inner wall of the exhaust air pipe under the action of exhaust air flow, collected and flows down along the inner wall to enter the annular water tank, and then is discharged to the outside of the exhaust air pipe through the water discharge hole. Prevent rainwater from entering the lower exhaust air pipe and the fan, and cause the damage of the fan. In addition, the hood at the top of the existing exhaust air pipe is omitted, so that the exhaust resistance of the exhaust air pipe can be reduced, and the energy consumption of an exhaust system is reduced.

The top of the exhaust air pipe 7 is provided with a flange 6, the two cover plates 3 are symmetrically arranged, and the lower ends of the cover plates 3 are connected with the flange 6 through hinges. The flange 6 is provided with a stop block 8 at a position corresponding to the cover plate. The stop block 8 is arranged at the flange 6 to prevent the cover plate 3 from turning outwards, so that the opening angle of the cover plate 3 can be controlled.

The cover plate 3 is welded with symmetrical circular counterweight rods 4, and the threaded ends of the counterweight rods 4 are in threaded connection with the circular counterweight blocks 5, so that the counterweight can be conveniently adjusted. To prevent loosening, a lock nut 10 is mounted on each end of the weight.

The cover plate 3 is hinged with the flange 6 by a hinge 9. When the fan works, the cover plate 3 is blown open by air flow, and the counterweight is adjusted before, so that the cover plate 3 can be easily blown open and can be easily closed by self weight, and the opening degree of the cover plate 3 is determined by the stop block 8 welded on the flange 6. When the fan does not work, the cover plate 3 is closed by self weight, and rainwater is blocked outside the exhaust air pipe.

When the rain falls and the fan works, as the cover plate 3 which is opened under the action of wind force loses the water retaining effect, the rain can enter the air exhaust air pipe 7, is blown to the inner wall of the air exhaust air pipe 7 under the action of air exhaust air flow, is converged and flows down along the inner wall, falls into the annular drainage groove formed by the water retaining plate 1 and the air exhaust air pipe 7, and is discharged to the outside of the air exhaust air pipe through the water discharge hole 2.

Specifically, the water baffle 1 and the water drain hole 2 are arranged at the bottom of a section of air exhaust air pipe at the top end of the air exhaust air pipe. The water baffle and the inner wall of the upward exhaust metal air pipe are sealed by sealant so as to prevent rainwater from entering the next section of upward exhaust metal air pipe.

Specifically, the length of the water baffle 1 is not less than 80mm, the downwind air flow direction is inclined towards the inner side of the air exhaust pipe, an angle of 30 degrees is formed between the downwind air baffle and the inner wall of the air exhaust pipe, the downwind water baffle is distributed annularly along the inner wall of the air exhaust pipe, and an annular drainage groove is formed between the downwind water baffle and the inner wall of the air exhaust pipe; the inner walls of the water baffle plate 1 and the air exhaust air pipe 7 are sealed by sealant so as to prevent rainwater from entering the next section of air exhaust air pipe.

Specifically, the water discharge hole 2 is positioned at the upper position of the joint of the air exhaust pipe 7 and the water baffle 1; the diameter of the water discharge holes 2 is 12mm, the number of the water discharge holes required is calculated according to the size of the air exhaust air pipe, and the water discharge holes are uniformly distributed along the perimeter of the air exhaust air pipe wall; the ratio of the total area of the water discharge holes 2 to the cross section area of the air exhaust pipe is not less than 0.2 percent.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (9)

1. The rainwater inlet preventing device for the upward air exhaust air pipe is characterized by comprising an upper cover, a water baffle and a water discharge hole;

the upper cover comprises two cover plates which are split, the two cover plates are positioned at the top end of the air exhaust air pipe, the lower end of each cover plate is hinged with the air exhaust air pipe, and the cover plates are provided with balancing weights;

the water baffle and the water drain hole are arranged at the bottom of a section of exhaust air pipe at the top end of the exhaust air pipe;

the water baffle is circumferentially arranged on the inner side of the air exhaust air pipe, and an annular drainage groove with an opening at the top end is formed between the water baffle and the air exhaust air pipe;

the water draining hole is arranged on the air exhausting air pipe and is communicated with the annular water tank.

2. The rainwater inlet preventing device for an upward exhaust air duct according to claim 1, wherein the water baffle is inclined to the inner side of the exhaust air duct along the exhaust air flow direction, and the lower side of the water baffle is connected with the bottom of a section of exhaust air duct at the top end of the exhaust air duct.

3. The upward-exhaust air duct rainwater-inlet-preventing device according to claim 2, wherein the water baffle and the inner wall of the exhaust air duct are sealed by sealant.

4. The upward-exhaust-air-duct rainwater-inlet-preventing device according to claim 1, wherein a plurality of water discharge holes are uniformly distributed along the circumference of the wall of the exhaust-air duct.

5. The upward-exhaust air duct rainwater inlet preventing device according to claim 1, wherein the water discharge hole is arranged at a position higher than the height of the joint of the water baffle and the exhaust air duct.

6. The rainwater inlet preventing device for the upward exhaust air duct according to claim 1, wherein the flange is arranged at the top of the exhaust air duct, the two cover plates are symmetrically arranged, and the lower ends of the cover plates are connected with the flange through hinges.

7. The upward-exhausting-air-duct rainwater-entering-preventing device according to claim 6, wherein a stop block is arranged at a position of the flange corresponding to the cover plate.

8. The upward-exhaust air duct rainwater inlet preventing device according to claim 1, wherein a counterweight rod is arranged at the lower end of the cover plate;

the counterweight rod is arranged on the counterweight rod, and the position of the counterweight relative to the counterweight rod is adjustable.

9. The upward-exhausting air duct rainwater-entering-preventing device according to claim 8, wherein threads are arranged on the counterweight rod, and the counterweight is in threaded connection with the counterweight rod.

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