RU131656U1 - FINE SPRAY LIQUID - Google Patents

Abstract

1. A finely dispersed liquid atomizer comprising a truncated cone body with an inlet port in communication with nozzles uniformly located on the side surface of the cone, characterized in that each nozzle has a cylindrical inlet channel, a conical outlet channel, the diameter of the larger base of which is smaller than the diameter of the inlet channel nozzles and an output nozzle, in the cylindrical inlet channel a swirl is installed, made in the form of a single element, the lower part of which is a disk whose diameter smaller than the diameter of the cylindrical inlet channel, the upper part is a ring whose outer diameter is equal to the diameter of the cylindrical inlet channel, and the inner is equal to the diameter of the larger base of the conical outlet channel, in the ring there are through cuts of rectangular section located in a plane perpendicular to the axis of the swirl and tangent to its circumference, forming the outlet channel of the swirler, and the inner cavity of the ring forms a twisting chamber. 2. The fine liquid sprayer according to claim 1, characterized in that the area of the passage section of the output channel of the swirl (slot) F = ab, where a is the width of the channel, b is the height of the channel, is also the length of the swirl chamber, and the length of the output channel of the swirl is L = d -d2, where d is the diameter of the input channel of the nozzle, and d is the diameter of the larger base of the conical output channel, in addition, L = (1.5-2) b.3. The fine liquid sprayer according to claim 1, characterized in that the ratio of the geometric parameters is described by the value A (the geometric characteristic of the centrifugal nozzle), R is the shoulder

Description

The invention relates to a liquid spraying technique and can be used in fire fighting equipment, for example, in a fire fighting system of ship engine rooms.

Known fine liquid spray (RF patent No. 2150336, IPC B05B 1/14, publ. 06/10/2000), containing a hollow cylindrical body, on the outer surface of which is placed at least one row of nozzles formed by a groove with conical surfaces and channels made in the housing parallel to its axis of symmetry and communicated with the internal cavity of the housing, the lateral surface of which partially intersects the conical surfaces of the groove, and the fluid supply pipe, and the conical surfaces forming the groove are made symmetrical about a transverse plane of the hull at the point of intersection, the conical surfaces intersect bore channels parallel to axis of the housing, dividing them into two equal parts. In the known device, the uniformity of surface irrigation and fine dispersion is achieved due to the collision of fluid flows in the internal grooves and the special installation of nozzles on the end surface. The disadvantages of this fine liquid spray are technological difficulties in the manufacture of the device and low irrigation intensity (0.025 kg / m ² s).

Known spray device company "Marioff", Finland (www.cleper.ru. HI-FOG - modern fire extinguishing systems, finely dispersed, 10/18/2008, www.marioff.com. Marine fire protection systems). The spray device of the Marioff company consists of a body, which is a truncated cone, an internal manifold and 6 nozzles evenly placed on the side surface of the cone. The design provides uniform spray of liquid. The disadvantage of this sprayer is that a fine spray of liquid is provided only at pressures of 8 ÷ 14 MPa, which requires strengthening the design and imposes additional conditions on the fluid supply system.

The technical result, which the proposed utility model is aimed at, is to provide a fine spray of liquid at low supply pressures (not exceeding 0.6 MPa).

The technical result is achieved in that in a finely dispersed liquid atomizer containing a housing in the form of a truncated cone with an inlet pipe in communication with nozzles uniformly located on the side surface of the cone, it is new that each nozzle has a cylindrical inlet channel, a conical outlet channel, and a diameter a larger base which is smaller than the diameter of the inlet channel of the nozzle and the outlet nozzle, in the cylindrical inlet channel there is a swirler made in the form of a single element, the lower part of which the first is a disk whose diameter is smaller than the diameter of the cylindrical inlet channel, and the upper part is a ring whose outer diameter is equal to the diameter of the cylindrical inlet channel and the inner one is equal to the diameter of the larger base of the conical outlet channel, through-hole cuts of rectangular cross section are arranged in a plane perpendicular to the axis of the swirl and tangent to its circumference, forming the outlet channel of the swirl, and the inner cavity of the ring forms a twisting chamber.

Square outlet swirler passage section (slit) F _BX = a * b, where a - width of the channel, in the - height of the channel, while a twist length of the chamber, and outlet duct swirler length L = d ₁ -d _2/2, where d ₁ - the diameter of the input channel of the nozzle, and d ₂ - the diameter of the larger base of the conical output channel, in addition, L = (1,5-2) b.

The ratio of geometric parameters is described by the value A (geometric characteristic of the centrifugal nozzle):

,

,

R is the shoulder twisting;

r _{with the} radius of the nozzle nozzle,

n is the number of input channels,

F _I - the area of one channel, F _I = a * b, while the characteristic A for is 0.6 ÷ 0.8, which corresponds to the angle of the liquid cone at the outlet of the nozzles 45 °.

The number of nozzles providing uniform spray is 8 and they are arranged evenly around the circumference on the side surface of the conical atomizer body through an angle of 45º.

Square outlet swirler passage section (slit) F _in = a * b, where a - width of the channel, in the - height of the channel, while a twist length of the chamber, and outlet duct swirler length L = d ₁ -d _2/2, where d ₁ - the diameter of the input channel of the nozzle, ad ₂ - the diameter of the larger base of the conical output channel, in addition, L = (1,5-2) b.

Figure 1 presents the proposed atomizer.

Figure 2 - nozzle with swirl

In Fig 3 - swirl.

The sprayer comprises a housing 1 in the form of a truncated cone with an inlet pipe 2 in communication with nozzles 3 uniformly located on the side surface of the cone. Each nozzle 3 has a cylindrical inlet channel 4, a swirl chamber 5, a conical output channel 6, the diameter of which is smaller than the diameter of the cylindrical inlet channel 4 of the nozzle 3 and the outlet nozzle 7. In the cylindrical inlet channel 3, a swirler 8. The output channel 9 of the swirl 8 has a rectangular section and is located in the plane perpendicular to the axis of the swirler 8 and tangent to its circumference. The swirl 8 is made in the form of a single element, the lower part of which is a disk 10, the diameter of which is less than the diameter of the cylindrical inlet channel 4, and the upper part is a ring 11, the outer diameter of which is equal to the diameter of the cylindrical inlet channel 4, and the inner one is equal to the diameter of the larger base of the conical output channel 6. In the ring 11 there are made through cuts of rectangular cross section, forming the output channel 9 of the swirler 8. The twisting chamber 5 is formed by the internal cavity of the ring 11 and the plane of the disk 10.

The flow area of the output channel 9 of the swirler 8 (slots) F _I = a * b,

where a is the channel width,

b is the height of the channel, which is simultaneously the length of the swirl chamber 5.

Output channel length swirler L = d ₁ -d _2/2,

where d ₁ is the diameter of the input channel of the nozzle, ad ₂ is the diameter of the larger base of the conical output channel, in addition, L = (1.5-2) b.

Nozzle 3 with swirl 8 is centrifugal, for which the ratio of geometric parameters is described by the value A (geometric characteristic of the centrifugal nozzle):

,

,

R is the shoulder twisting;

r _{with the} radius of the nozzle nozzle,

n is the number of input channels,

F _BX - the area of one channel, F _I = a * b.

Characteristic A for the proposed device is 0.6 ÷ 0.8, which corresponds to the angle of the liquid cone at the outlet of the nozzles 45 °. The number of nozzles providing uniform spray is 8 pieces: 45 ° * 8 = 360 °.

The proposed spray operates as follows.

The fluid through the inlet pipe 2 and the distribution manifold is supplied to the nozzles 3 and to the swirlers 8. Using swirls 8, the fluid is centrifuged and the fluid in a swirling state is supplied to the outlet nozzle 7 of the nozzle 3. In the outlet nozzle 7, the swirling liquid stream is converted into a thin film, the thickness of which depends on the thickness of the droplets. In the proposed sprayer, the film thickness at the exit of the nozzle is 100 μm. Further, this film is transformed into separate filaments due to rupture, which, in turn, are divided into droplets.

The performance of the proposed spray is confirmed in practice: water was supplied with a pressure of 0.6 MPa to the inlet of the spray. To study the particle size spectrum, the method of small-angle light scattering was used, which makes it possible to measure the particle sizes of the discrete phase in flows. Tests were conducted for the nozzle exit nozzle diameter from 1.1 mm to 1.6 mm. The droplet size did not exceed 100 μm.

Claims (4)

1. A finely dispersed liquid atomizer comprising a truncated cone body with an inlet port in communication with nozzles uniformly located on the side surface of the cone, characterized in that each nozzle has a cylindrical inlet channel, a conical outlet channel, the diameter of the larger base of which is smaller than the diameter of the inlet channel nozzles and an output nozzle, in the cylindrical inlet channel a swirl is installed, made in the form of a single element, the lower part of which is a disk whose diameter smaller than the diameter of the cylindrical inlet channel, the upper part is a ring whose outer diameter is equal to the diameter of the cylindrical inlet channel, and the inner is equal to the diameter of the larger base of the conical outlet channel, in the ring there are through cuts of rectangular section located in a plane perpendicular to the axis of the swirl and tangent to its circumference, forming the outlet channel of the swirler, and the inner cavity of the ring forms a twisting chamber. 2. The finely divided liquid sprayer according to claim 1, characterized in that the area of the passage section of the outlet channel of the swirler (slot) F _in = ab, where a is the width of the channel, b is the height of the channel, is also the length of the swirl chamber, and the length of the swirl outlet channel L = d ₁ -d _2/2, where d ₁ - the diameter of the nozzle inlet, ad ₂ - diameter of the larger base of the conical outlet, in addition, L = (1,5-2) b. 3. The finely divided liquid sprayer according to claim 1, characterized in that the ratio of the geometric parameters is described by the value A (geometric characteristic of the centrifugal nozzle) $$A=R{r}_c\pi /(n{F}_{\mathrm{at}x})$$

, R is the shoulder twisting; r _c is the radius of the nozzle of the nozzle, n is the number of input channels, F _I - the area of one channel, F _I = ab, while the characteristic A for is 0.6 ÷ 0.8, which corresponds to the angle of the liquid cone at the outlet of the nozzles 45 °. 4. The finely divided liquid sprayer according to claim 1, characterized in that the number of nozzles providing uniform spray is 8 and they are arranged uniformly around the circumference on the side surface of the conical body of the sprayer through an angle of 45 °.

Images