KR20110131032A - Internal mixing typed atomizing nozzle - Google Patents

Abstract

PURPOSE: An internal mixing spraying nozzle is provided to improve spray volume by spraying in a vortex state with the same direction as a gas. CONSTITUTION: A liquid supply tube(100) includes a liquid supply passage(110). A gas supply manifold(200) is formed in the direction of an outer circumference, which is separated from the liquid supply tube, at a constant interval. The gas supply manifold includes a plurality of gas supply passages(210) which supplies a high pressure gas. A nozzle body(400) comprises an expansion chamber, a bumping pin, and a spray orifice. A gas guide(300) sprays the gas into the expansion chamber.

Description

INTERNAL MIXING TYPED ATOMIZING NOZZLE}

The present invention relates to a nozzle for pumping liquid and spraying it in the form of a mist, and more particularly, to a nozzle in which the liquid is misted by compressed air or compressed steam mixed with the liquid inside the nozzle.

The nozzles for mixing and spraying liquid and gas may be divided into internally mixed spray nozzles that mix them inside the nozzles and externally mixed spray nozzles that mix outside the nozzles. Among these, internally mixed spray nozzles are not independent of liquid and gas flow, and the change of gas flow affects the liquid flow.

These internally mixed spray nozzles are used to cool and clean hot gases containing a large amount of dust, such as plants that require a large number of spray nozzles, such as converter plants in steel mills. It must be designed to operate a larger number of spray nozzles from a source of air or compressed steam.

As an example of such a nozzle, the nozzle described in Korean Patent Publication No. 10-0562727 (name of the invention: a mist-spraying spray nozzle of internal mixed air) includes a main body 11, a collision pin 21, an air supply unit 14, and an air guide. It consists of a portion 30, an expansion chamber 23 and a spaced orifice 18.

Specifically, with reference to FIG. 1, the body 11 has a liquid passage 19 terminating in a single discharge orifice 20. The impingement pin 21 has an approximately flat end 22 spaced apart from the orifice 20 and a compressed liquid jet discharged through the orifice 20 impinges on the end 22 and breaks up into a dispersed liquid flow. do. The air supply 14 discharges air around the discharge orifice 20, and the discharged compressed air forms an annular curtain of air around the liquid jet. An air guide 30 is disposed between the air supply 14 and the impingement pin 21 to contract the air curtain and increase its speed at the same time, whereby the air curtain impinges on the scattered liquid flow and mists it. It is further fogged with the oxidized particles and has an outlet 33 through which the jet and curtain pass before the liquid jet collides with the impact pin 21. The expansion chamber 23 is disposed downstream of the discharge port 33 and communicates with the discharge port 33, extends around the end 22 of the impact pin 21 and extends out of the discharge port 33 and the impact pin 21. It has a significantly larger cross-sectional area than the cross-sectional area, whereby the liquid discharged through the discharge orifice 20 expands inside the expansion chamber 23, limiting the misted particles from mixing with each other to form larger particles again. . The spacing orifices 18 are spaced at an angle around the impact pin 21 and directly communicate between the expansion chamber 23 and the atmosphere, releasing particles from the expansion chamber 23 and performing further misting of the particles. .

However, according to the conventional spray nozzles as described above, when the pressure of the supplied compressed air is low, the mist does not proceed sufficiently, and some of the misted liquid particles emitted to the outside are combined with other particles, which eventually increases the size of the particles. There was a problem.

In addition, as the spraying distance of the particles emitted from each of the spaced orifices 18 is short, the spraying region is difficult to control, and as the velocity of the liquid particles sprayed to the outer portion is lowered as compared to the center portion of the spraying region, the particles recombine to proceed. There was a problem that the size of the.

In order to solve the above-mentioned problems of the background art, the present invention provides an internal mixed spray nozzle which forms a vortex with respect to the gas injected into the expansion chamber, and sprays the mist of liquid particles to the outside while forming a vortex in the same direction. The purpose is to provide.

It is also an object of the present invention to provide an internally mixed spray nozzle for spraying a part of the gas supplied to the outside of the spray zone of the misted liquid particles sprayed to the outside.

The internal mixed spray nozzle of the present invention for solving the above problems is a liquid supply tube formed with a liquid supply passage for supplying a liquid along an axis; A gas supply manifold formed at intervals in an outer circumferential direction spaced from the liquid supply tube and having a plurality of gas supply passages for supplying a high pressure gas; An expansion chamber coupled to an outer circumference of the gas supply manifold, the expansion chamber formed below the liquid supply passage, a collision pin protruding upward along an axis below the expansion chamber, and spaced apart in a circumferential direction on an inclined surface around the collision pin; A nozzle body having a plurality of spraying orifices formed on the substrate; And a gas guide inserted between the nozzle body and the gas supply manifold to guide the high pressure gas passing through the gas supply passage to the annular gas passage around the liquid supply tube to inject gas into the expansion chamber. And forming a processing surface such that the center line of each of the gas supply passages is inclined at an angle with respect to a line parallel to the axis line to form a vortex in the gas supplied into the expansion chamber.

In addition, the internal mixed spray nozzle according to another embodiment of the present invention is formed at intervals around the upper end of the gas guide to form a plurality of gas branch grooves for branching the gas supplied by the gas supply passage,

A plurality of gas connection passages formed on the nozzle body at intervals in an outer circumferential direction of the axis and connected to the gas branch grooves; A gas guide passage coupled to an outer circumference of the nozzle body and connected to the gas connecting passage between the outer circumferential surfaces of the nozzle body; And an annular gas injection slit for injecting gas to the outside of the entire spray orifice at the bottom of the gas guide passage; It further includes an outer cap provided.

Preferably, the center line of the gas supply passage is formed to be inclined 25 ° to 35 ° with respect to the line parallel to the axis.

Preferably, each of the spray orifices forms a processing surface to be inclined in the same direction as the gas supply passage to form a vortex in the misted liquid sprayed to the outside.

Preferably, the gas connecting passage forms a processing surface inclined in the same direction as the gas supply passage to form a vortex in the gas injected to the outside through the gas injection slit.

Preferably, the center line of the gas connection passage is formed to be inclined 15 ° to 25 ° with respect to the line parallel to the axis.

According to the present invention described above, since the vortex is formed in the gas injected into the expansion chamber, the liquid particles are further misted, and the particles sprayed through the spray orifice can also improve the spray amount as the vortex is formed.

In addition, by spraying a portion of the gas supplied to the outer portion of the spray zone, the spraying distance of the liquid particles is improved while controlling the spray zone is easy, and the sprayed gas forms a vortex in the same direction as the liquid particles sprayed through the spray orifice. The spray amount can be further improved.

1 is a cross-sectional view of a conventional internally mixed spray nozzle.
2 is a perspective view of a nozzle according to the present invention;
Figure 3 is a perspective view showing the assembled state of the components constituting the present invention.
4 is a plan view of a gas supply manifold constituting the present invention.
5 is a bottom perspective view of the nozzle body constituting the present invention;
6 is a longitudinal sectional view of the nozzle according to the present invention;
7 to 9 are cross-sectional views of AA, BB and CC of FIG. 6, respectively.
10 is a state diagram showing the fluid flow of the spray nozzle according to the present invention.

Hereinafter, an internal mixing spray nozzle of the present invention will be described with reference to the accompanying drawings.

The spray nozzle of the present invention is composed of a liquid supply tube 100, a gas supply manifold 200, a gas guide 300, a nozzle body 400 and an outer cap 500 are assembled as shown in FIG.

The liquid supply tube 100 has a liquid supply passage 110 through which liquid is supplied along an axis therein, and a lower outer peripheral surface thereof is inclined toward the axis. Here, the axis is a dashed-dotted line indicating a center line in the assembling direction in FIG. 3, which will be described below with reference to the axis for convenience of description.

Gas supply manifold 200 is coupled to the liquid supply tube 100 in the hollow portion in the center through which the axis passes through, and spaced apart from the liquid supply tube 100 as shown in Figure 4 at a constant interval in the circumferential direction A plurality of gas supply passage 210 is formed. High-pressure gas (air or steam) is supplied at a uniform pressure through the gas supply passage 210. At this time, the inner peripheral surface of each gas supply passage 210 has a processing surface 211 inclined at an angle with respect to a line parallel to the axis line as shown in FIGS. Done. According to the drawing is formed to be inclined at a predetermined angle in the counterclockwise direction with respect to the axis. At this time, the center line of the gas supply passage 210 is preferably formed to be inclined 25 ° to 35 ° with respect to the line parallel to the axis, when the inclination angle is small, the formation of the vortex is small and conversely if the inclination angle is too large, the gas supply is smooth It is not done.

The air guide 300 is inserted between the gas supply manifold 200 in a state seated on the nozzle body 400. The inner surface of the air guide 300 is formed to be inclined toward the axis to form an annular gas passage 320 between the outer peripheral surface of the lower end of the liquid supply tube (100). Therefore, the high pressure gas supplied from the gas supply passage 210 passes through the annular gas passage 320.

The nozzle body 400 is coupled to the thread of the lower outer circumferential surface of the gas supply manifold 200 by the thread formed on the upper inner circumferential surface. The liquid supplied from the liquid supply passage 110 and the gas supplied from the gas supply passage 210 are mixed in the inner space corresponding to the lower portion of the liquid supply tube 100 inserted into the gas supply manifold 200. An expansion chamber 420 having a space that can be expanded is provided.

In addition, the lower portion of the expansion chamber 420 is provided with a collision pin 430 having a collision surface 431 protruding upward along the axis line and the top is flat, the liquid supplied into the expansion chamber 420 is the collision surface ( The liquid particles are divided into fine liquid particles while colliding with 431, and the liquid particles are misted into finer particles by the high pressure gas supplied through the annular gas passage 320 around the lower end of the liquid supply tube 100.

The finely misted liquid particles are formed on the surface inclined in the axial direction around the impingement pins 430 with a plurality of spray orifices 440 at regular intervals in the circumferential direction of the axis. At this time, the inner circumferential surface of each spray orifice 440 is sprayed to the outside while rotating in the same direction as the flow direction of the liquid particles inside the expansion chamber 420 in which the vortex is formed by the gas supply passage 210 as shown in FIGS. It is preferable to form the processing surface 441 inclined at an angle with respect to the line whose center line is parallel to an axis line.

On the other hand, the above description has been injected all the gas passing through the gas supply passage 210 into the expansion chamber 420 through the annular gas passage 320, as another embodiment of the present invention (claim 2), The outer cap 500 may be further provided to form a gas injection slit 520 for branching a part of the gas passing through the gas supply passage 210 and spraying it to the outside of the spray orifice 440.

To this end, the gas branch groove 310 is formed at a predetermined interval around the upper end of the gas guide 300 to branch a part of the gas supplied from the gas supply passage 210 to the outside. In addition, a gas connection passage 410 connected to the gas branch groove 310 at a predetermined interval in the circumferential direction of the axis in the upper portion of the nozzle body 400 is provided as shown in FIGS. 5 and 8.

The thread formed on the upper inner circumferential surface of the outer cap 500 is combined with the thread formed on the outer circumferential surface of the nozzle body 400, and an annular gas guide passage 510 is formed between the outer circumferential surface of the nozzle body 400 and the outer cap 500. At the lower end of the gas guide passage 510, an annular gas injection slit 520 having a narrow passage is formed outside the entire spray orifice 440. Therefore, the misted liquid particles sprayed through the spray orifice 440 is limited to the spray area by the gas sprayed from the gas spray slit 520 therein, and the spray distance is improved.

At this time, in order to form a vortex in the gas passing through each of the gas connection passage 410 formed in the nozzle body 400, the machining surface 411 the centerline of the gas connection passage 410 is inclined at an angle with respect to the line parallel to the axis It is preferable to form a, and it is more preferable that the inclination angle is 15 degrees to 25 degrees. At this time, if the inclination angle is too small, the effect of the vortex does not occur, if too large because the pressure of the gas is lowered.

 Hereinafter, a line in which each centerline is parallel to the axis to form a vortex in the fluid passing through each of the gas supply passage 210, the gas connection passage 410, and the spray orifice 440 among the spray nozzles configured as described above. The fluid flow of the spray nozzle in which the processing surfaces 211, 411, 441 are formed to be inclined at an angle will be described with reference to FIG. 10.

First, when the liquid supply tube 100 and the gas supply manifold 200 are coupled to the adapter 500 for supplying liquid and gas from the outside, the liquid is supplied through the liquid supply passage 110, and the gas is supplied to the plurality of gases. It is supplied through the supply passage 210.

The liquid supplied through the liquid supply passage 110 expands in the process of passing through the expansion chamber 420, which is an expanded space, and collides with the collision surface 431 of the collision pin 430 to separate the liquid into small particles. At this time, the compressed gas discharged in the vortex form while passing through the plurality of gas supply passages 210 is supplied in the vortex state into the expansion chamber 420 via the annular gas passage 320. Therefore, the small particles of the liquid split by the impingement pin 430 become finer in the chamber by the high pressure vortex gas and at the same time serve to uniformly mix the fine liquid particles in the chamber. As such, the fine liquid particles formed inside the expansion chamber 420 are sprayed to the outside while passing through the spray orifice 440 to form a secondary vortex, wherein the pressure is relatively low compared to the expansion chamber 420 having a high pressure. As they are released, the fine liquid particles become finer.

On the other hand, some of the gas branched by the gas branch groove 310 of the gas guide 300 of the gas supplied through the gas supply passage 210 through the gas connection passage 410, respectively, of the annular form in the form of vortex The gas guide passage 510 and the flow path are injected through the narrow gas injection slit 520. At this time, the gas is sprayed to the outside of the entire spray orifice 440 to define the outside of the spray area of the liquid particles, and at the same time to collide with the fine liquid particles present in the outside of the spray rate is lower than the inside of the spray area to further accelerate the refinement of the particles Of course, it is possible to prevent recombination between the fine liquid particles to keep the final sprayed liquid particles more finely.

In addition, the gas branched by the gas branch groove 310 when assuming that the compressed gas of the same pressure as the conventional spray nozzle is supplied by employing the gas supply passage 210 to form a vortex unlike the conventional spray nozzle Only a portion of the expansion chamber 420 can be sufficiently fine mist of the liquid, and by spraying a portion of the remaining branched gas outside the spray orifice 440 to improve the spray distance as well as to control the spray area In addition, the final sprayed liquid particles can be made finer and the spray amount can be further increased.

In the above description, the specific embodiments of the present invention have been described, but the scope of the present invention is not limited to the individual configurations described in the embodiments, and the modifications and the equivalents of the present invention will be described based on the technical spirit of the present invention. will be.

100: liquid supply tube 110: liquid supply passage
200: gas supply manifold 210: gas supply passage
211: machining surface 300: gas guide
310: gas branch groove 320: annular gas passage
400: nozzle body 410: gas connection passage
420: expansion chamber 430: collision pin
431: collision surface 440: spray orifice
441 machining surface 500 outer cap
510: gas guide passage 520: gas injection slit

Claims (6)

A liquid supply tube having a liquid supply passage for supplying liquid along an axis;
A gas supply manifold formed at intervals in an outer circumferential direction spaced from the liquid supply tube and having a plurality of gas supply passages for supplying a high pressure gas;
A nozzle having an expansion chamber formed below the liquid supply passage, a collision pin protruding upward along an axis line below the expansion chamber, and a plurality of spray orifices formed at intervals in the circumferential direction on an inclined surface around the collision pin; main body; And
A gas guide for injecting gas into the expansion chamber by guiding the high pressure gas passing through the gas supply passage to the annular gas passage around the liquid supply tube; And
And forming a processing surface such that the center line of each of the gas supply passages is inclined at an angle with respect to a line parallel to the axis to form a vortex in the gas supplied into the expansion chamber. The method of claim 1,
Is formed at intervals around the upper end of the gas guide to form a plurality of gas branch grooves for branching the gas supplied by the gas supply passage,
Forming a plurality of gas connection passages connected to the gas branch grooves at intervals in the outer circumferential direction of the axis on the nozzle body;
A plurality of gas connection passages formed on the nozzle body at intervals in an outer circumferential direction of the axis and connected to the gas branch grooves; A gas guide passage coupled to an outer circumference of the nozzle body and connected to the gas connecting passage between the outer circumferential surfaces of the nozzle body; And an annular gas injection slit for injecting gas to the outside of the entire spray orifice at the bottom of the gas guide passage; Internally mixed spray nozzles further comprising an outer cap having a. The method according to claim 1 or 2,
And a center line of the gas supply passage is formed to be inclined at 25 ° to 35 ° with respect to a line parallel to the axis. The method according to claim 1 or 2,
And the spray orifices each form a processing surface to be inclined in the same direction as the gas supply passage to form a vortex in the misted liquid sprayed to the outside. The method of claim 2,
And the gas connection passage forms a processing surface that is inclined in the same direction as the gas supply passage to form a vortex in the gas injected to the outside through the gas injection slit. The method of claim 5,
The center line of the gas connection passage is internally mixed spray nozzle, characterized in that formed to be inclined 15 ° to 25 ° with respect to the line parallel to the axis.

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