RU141663U1 - Liquid spray - Google Patents

Liquid spray Download PDF

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Publication number
RU141663U1
RU141663U1 RU2014103563/05U RU2014103563U RU141663U1 RU 141663 U1 RU141663 U1 RU 141663U1 RU 2014103563/05 U RU2014103563/05 U RU 2014103563/05U RU 2014103563 U RU2014103563 U RU 2014103563U RU 141663 U1 RU141663 U1 RU 141663U1
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RU
Russia
Prior art keywords
nozzles
housing
supply pipe
fluid supply
width
Prior art date
Application number
RU2014103563/05U
Other languages
Russian (ru)
Inventor
Андрей Леонидович Душкин
Николай Николаевич Рязанцев
Сергей Евгеньевич Ловчинский
Original Assignee
Открытое акционерное общество "Федеральная сетевая компания Единой энергетической системы"
Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский авиационный институт (национальный исследовательский университет)"
Общество с ограниченной ответственностью "Темперо"
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Application filed by Открытое акционерное общество "Федеральная сетевая компания Единой энергетической системы", Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский авиационный институт (национальный исследовательский университет)", Общество с ограниченной ответственностью "Темперо" filed Critical Открытое акционерное общество "Федеральная сетевая компания Единой энергетической системы"
Priority to RU2014103563/05U priority Critical patent/RU141663U1/en
Application granted granted Critical
Publication of RU141663U1 publication Critical patent/RU141663U1/en

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Abstract

1. A liquid atomizer containing a hollow body in the form of a cylinder, equipped with a fluid supply pipe and a pair of nozzles formed on one housing generatrix in axial channels made in its wall and communicated with its internal cavity, the distance between the nozzles being 8 ÷ 40 times exceeds the width of the axial channel, the fluid supply pipe is located between the nozzles on the side surface of the housing from the opposite side. 2. The sprayer according to claim 1, characterized in that the axial channels are in communication with the annular cavity of the housing by annular grooves whose width is 0.5 ÷ 1.5 of the axial channel width. 3. A sprayer according to claim 1, characterized in that the housing is provided with an additional pair of nozzles formed on its generatrix shifted by an angle of not more than 30 °. 4. The sprayer according to claim 1, characterized in that the fluid supply pipe is placed symmetrically with respect to the nozzles.

Description

Technical field
The utility model relates to fire fighting equipment and is designed to extinguish fires using finely dispersed water at transformer substations and other facilities where people and valuable equipment are located, as well as in agriculture for irrigation and field treatment with liquid compounds, in chemical technology and heat power devices.
State of the art
A device for spraying liquid (patent RU 2111033) is known, which comprises a hollow cylindrical body, on the outer surface of which at least two rows of nozzles are formed, formed by a groove with conical surfaces and channels made in the body parallel to the axis of symmetry of the cylinder of the body and communicated with the inner the body cavity with annular cylindrical collectors, the lateral surface of which partially intersects the conical surfaces of the groove, and the fluid supply pipe. The described device creates a finely dispersed stream of droplets with a diameter of 60-150 microns. The disadvantage of this device is the small area irrigated by the sprayer up to 20 m 2 (in the shape of a circle), and therefore, to protect objects of large geometric sizes and complex shapes (for example, a power oil-filled transformer), a larger number of such sprayers are required. As a result, the flow rate of the sprayed liquid is unjustifiably increased to achieve the necessary irrigation intensity over the entire area of the facility.
Closest to the claimed utility model in technical essence and the achieved result is a sprayer containing a hollow body in the form of a cylinder, equipped with a fluid supply pipe and nozzles formed in axial channels made in the wall of the body and communicated with its internal cavity (patent RU 2150336). This sprayer is selected as a prototype.
In the prototype, the fluid supply pipe is located in one end of the cylindrical body, and the nozzles are staggered on the side surface of the body and, in addition, on its other end.
The use of a prototype atomizer makes it possible to obtain a uniform finely dispersed stream of droplets with a droplet diameter of 30 to 150 μm at a water supply pressure of not more than 1 MPa over a relatively small area, with an increase in which the size of the most distant (long-range) droplets increases and the fluid flow increases. This forces the use of more energy and metal-intensive devices for supplying fluid to the device nozzle.
Utility Model Essence
The technical result of the claimed utility model is an increase in irrigation area without increasing fluid flow. This allows you to protect objects of large geometric dimensions and complex shapes (for example, power oil-filled transformer) with a lower consumption of sprayed liquid.
The subject of a utility model is a liquid atomizer containing a hollow body in the form of a cylinder, equipped with a fluid supply pipe and a pair of nozzles formed in axial channels made in the wall of the body and communicated with its internal cavity, while, unlike the prototype, the nozzles are formed on one forming a cylindrical body, the distance between the nozzles is 8 ÷ 40 times the width of the axial channel, and the fluid supply pipe is placed between the nozzles on the side surface of the housing with the opposite side.
This allows you to get the above technical result.
The utility model has developments aimed at further increasing the irrigated spray area without increasing the flow rate of the liquid, which consists in the fact that:
- axial channels are in communication with the inner cavity of the housing by annular grooves whose width is 0.5 ÷ 4.5 of the axial channel width;
- the housing is equipped with an additional pair of nozzles formed on its generatrix shifted by an angle of not more than 30 °;
- the fluid supply pipe is placed symmetrically with respect to the nozzles.
Implementation of a utility model, taking into account its developments
The implementation of the utility model is illustrated in the drawing, which shows the atomizer in longitudinal section. The figure shows a hollow cylindrical housing 1, two nozzles 2 formed in the axial channels 3 by grooving the wall of the housing 1. Channels 3 are made in the wall of the housing 1 and communicated with the inner cavity of the housing 1 by annular grooves 4. A pipe 5 for supplying liquid is placed between the nozzles 2 on the side surface of the housing 1 with a diametrically opposite with respect to the nozzles 2 of the side.
The nozzles 2 are formed by one generatrix of the cylindrical body 1 so that the distance between the nozzles 2 is 8 ÷ 40 times greater than the width of the channel 3. The width of the annular grooves 4 is 0.5 ÷ 4.5 the width of the channel 3.
On another generatrix of the cylindrical body, shifted by an angle of not more than 30 ° relative to the generatrix of the cylinder on which the nozzles 2 are located, an additional pair of nozzles (not shown in the figure) can be formed.
The sprayer operates as follows.
The working fluid, such as water, is fed into the cavity of the housing 1 through the nozzle 5 under a pressure of 0.3 ÷ 4.0 MPa.
Through the annular grooves 4 in the channels 3 and to the outlet openings of the nozzles 2, oncoming flows of fluid rush. After the collision of these flows in the channels 3, they flow out of the atomizer through the nozzles 2. This results in the formation of a fan-shaped gas-liquid stream in the form of swaddles from different nozzles 2.
When interacting with the surrounding atmosphere, the liquid flowing out of each nozzle 2 is crushed into small drops.
Due to the fact that the distance L between the nozzles 2 lies within 8 ÷ 40 of the diameters of the channel 3, the surrounding air is sucked into the gap between the flows generated by the nozzles 2 located on opposite sides of the nozzle 5. In this case, paired counter-directed eddies of the ejected gas are formed, which enhance the intensity of the interaction of flows due to their turbulization and collisions, causing secondary crushing of the droplets. As a result, a finely dispersed uniformly distributed stream of droplets is formed, irrigating a large area without increasing the flow rate of the liquid.
Reducing the distance L less than 8 diameters of the channels 3 leads to coagulation and enlargement of the sprayed droplets by reducing the amount of ambient air sucked out by the flowing jets of liquid. This unnecessarily increases the flow rate of the sprayed liquid.
An increase in the distance L over 40 diameters of channels 3 leads to a decrease in the interaction of droplet flows generated by separate nozzles 2, to the absence of paired vortices of air ejected by liquid flows and secondary crushing of droplets upon their collision in a gas-liquid flow, and, as a result, to the appearance of non-irrigated areas on the protected area.
The placement of the pipe 5 of the fluid supply between the nozzles 2 provides the same conditions for supplying fluid to the nozzles and, thus, contributes to the uniformity of irrigation of the protected object, necessary to minimize fluid flow. The symmetrical location of the pipe 5 between the nozzles 2, is optimal in this sense.
The best conditions for supplying the working fluid to the channels 3 of the atomizer are achieved when the width of the annular grooves 4 is equal to 0.5 ÷ 1.5 of the width of the channel 3. With a smaller width of the grooves 4, the liquid will enter the channels 3 with high hydraulic resistance, and therefore with large energy losses, which will lead to a decrease in the flow rate at the outlet of the nozzles 2, and, as a result, to a smaller range. When the width of the grooves 4 exceeds the width of the channel 3 by more than 1.5 times, the geometric dimensions of the atomizer, its weight and the amount of materials for its manufacture are unjustifiably increased.
With a similar formation of an additional pair of nozzles (with their channels 3) on another generatrix of the cylindrical body 1, shifted by an angle of not more than 30 ° relative to the first, the irrigated area will additionally increase (at a given liquid flow rate) due to collision and secondary crushing of droplets escaping from the nozzles 2 and from the shifted additional pair of nozzles. With a shift of more than 30 °, the interaction of the flows is weakened and does not provide secondary crushing of the colliding drops of liquid.
Comparative tests were carried out of liquid atomizers manufactured according to patent RU 2150336 and according to this utility model. On a protected area of 27.3 m 2 in the form of a circle, both test sprayers provided an irrigation intensity of 0.025 dm 3 / m 2 s. During the tests, the required irrigation intensity was set to 0.06 dm 3 / m 2 s and the protected area in the form of a rectangle with dimensions of 6 m × 8 m = 48 m 2 .
To provide such protection with a complete overlap of the protected surface, it turned out to be necessary to use 8 sprayers according to patent RU 150336 or only one sprayer of the claimed type (made taking into account the developments of this utility model).
The test results are shown in the table. As can be seen from the table, in the case of using a sprayer according to the present utility model, the water consumption decreased by more than two times due to the provision of uniform irrigation of the entire area with a given intensity without the formation of areas of excessive intensity, inevitable when using sprayers made according to the prototype design.
Table
No. Atomizer type The required number of nozzles Feed pressure, MPa Total water consumption dm 3 / m 2 s Maximum irrigation intensity with dm 3 / m 2 s The diameter of the droplets, microns
one according to patent RU 2150336 C1 8 0.8 6.55 0.135 50-100
2 According to this utility model one 0.8 3.05 0.06 50-100

Claims (4)

1. A liquid atomizer containing a hollow body in the form of a cylinder, equipped with a fluid supply pipe and a pair of nozzles formed on one housing generatrix in axial channels made in its wall and communicated with its internal cavity, the distance between the nozzles being 8 ÷ 40 times exceeds the width of the axial channel, the fluid supply pipe is placed between the nozzles on the side surface of the housing from the opposite side.
2. The atomizer according to claim 1, characterized in that the axial channels are in communication with the annular cavity of the housing by annular grooves whose width is 0.5 ÷ 1.5 of the axial channel width.
3. The sprayer according to claim 1, characterized in that the housing is equipped with an additional pair of nozzles formed on its generatrix shifted by an angle of not more than 30 °.
4. The sprayer according to claim 1, characterized in that the fluid supply pipe is placed symmetrically with respect to the nozzles.
Figure 00000001
RU2014103563/05U 2014-02-04 2014-02-04 Liquid spray RU141663U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2014103563/05U RU141663U1 (en) 2014-02-04 2014-02-04 Liquid spray

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2014103563/05U RU141663U1 (en) 2014-02-04 2014-02-04 Liquid spray

Publications (1)

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RU141663U1 true RU141663U1 (en) 2014-06-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2561107C1 (en) * 2014-10-08 2015-08-20 Николай Васильевич Барсуков Jet-vortex atomiser with ejecting flame
RU2678871C2 (en) * 2014-07-11 2019-02-04 Мариофф Корпорейшн Ой Device for fire extinguishing with sprayed water and method for production thereof
RU202165U1 (en) * 2020-11-02 2021-02-05 Андрей Леонидович Душкин Spray

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2678871C2 (en) * 2014-07-11 2019-02-04 Мариофф Корпорейшн Ой Device for fire extinguishing with sprayed water and method for production thereof
RU2561107C1 (en) * 2014-10-08 2015-08-20 Николай Васильевич Барсуков Jet-vortex atomiser with ejecting flame
RU202165U1 (en) * 2020-11-02 2021-02-05 Андрей Леонидович Душкин Spray

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