RU1788395C - Device for increasing air draught - Google Patents

Abstract

SUMMARY OF THE INVENTION; the radial partitions fastened among themselves are fixed on an external surface of a head. Different-sized conical rings are attached above the head to the radial partitions coaxially with the pipe to deflect the wind flow upward. The diameter of the smallest radial ring is larger than the inner-tube. The rings are arranged in height in order of increasing diameter. 1 ill.

Description

The invention relates to wind engineering and can be used on the head of a vertical ventilation pipe (chimney, chimney, wind turbine, etc.).

Devices are known for improving gas traction by utilizing the energy of a stream of external air (wind). Such a device, adopted as a prototype, consists of radial partitions fastened together, mounted on the outer part of the head of the vertical ventilation pipe i.

The disadvantage of the prototype is the small efficiency of the device due to the low energy utilization of the horizontal external air flow incident on the amplifier and the inability to use upward vertical external air flows.

The purpose of the invention is to increase productivity by increasing the ejection of gases in the tube by a wind stream of air.

The goal is achieved in that the device for reinforcing the thrust of air (gases), consisting of radial baffles fastened together, mounted on the outer surface of the head of the vertical ventilation pipe, further comprises different-sized conical rings attached coaxially to the radial baffles with the possibility of deviation of the wind flow upward, while the diameter of the smallest radial ring is larger than the inner diameter of the pipe, and the compression rings are arranged in height in the order of increasing m. The radial partitions and conical rings attached to each other form confusers of various shapes and sizes along the height and circumference of the device. In order to deflect the wind flow upward, the inner edges of the rings can be pushed upward, or otherwise.

The drawing shows a vertical section of the device at the head of the vertical ventilation-lips and a view from above.

The amplifier 1 is mounted on the head of the vertical ventilation pipe 2. It consists of several concentric

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circular conical rings 3, which are fastened by radial partitions 4. In this case, confusers 5 are formed along the height and circumference of the device. The inner edges of the rings 3 can be bent upward.

The air traction amplifier operates as follows.

When running onto the device, external air enters the confusers 5, where the air accelerates. At the outlet of the confusers, the flow is directed, for example, by means of the bent edges 6 of the rings 3 at an acute angle to the vertical. Once inside the amplifier, this stream causes the ejection of gases rising through the pipe. As is known, a circular ejection slot ejector allows more than double the efficiency compared to a conventional single-jet ejector. The device according to the invention is essentially a part of a circular ejector with jet radii equal to infinity. In this case, the physical picture of the interaction of the ejection air jets of the external flow with the gases of the vertical channel of the pipe is practically the same. Therefore, the proposed traction amplifier in comparison with the prototype and close analogues will have an efficiency and productivity of at least two times. In addition to the horizontal flows of external air in the proposed device is used and

vertically rising air flows around the pipe, which will further increase the efficiency of the amplifier.

The efficiency of the thrust amplifier is independent of the direction of the horizontal wind flow incident on it. In the presence of prevailing winds, the amplifier design on the side of these winds may differ from the rest

devices, for example the number and / or shape of confusers. This makes it possible to improve the performance of the proposed amplifier, its design is quite simple. Amplifier can be made

in any enterprise on their own.

Claims (1)

SUMMARY OF THE INVENTION A device for enhancing air traction, for example, on the head of a vertical ventilation pipe, comprising radial partitions fastened together, mounted on the outer surface of the head, characterized in that the device further comprises different-sized, conical rings attached above the head to the radial partitions coaxially with the pipe with the possibility of deflecting the wind flow upward, while the dia: meter of the smallest radial ring more than the inner diameter of the pipe is made, and the rings themselves are arranged in height in order of increasing diameter.