KR101056529B1 - Injector of gas-liquid mixture - Google Patents

Abstract

The gas-liquid mixed flow injector of the present invention, which forms and injects a gas-liquid mixed flow of liquid and gas, includes an injection port for injecting pressurized liquid, a flat flow path disposed downstream of the injection port, and a pressurized liquid. The first gas suction port which forms an airflow around the pressurized liquid injection port by the negative pressure, and the second gas suction port that is disposed downstream of the first gas suction port outside the width direction of the linear jet flow formed by the pressurized liquid. A gas suction port is provided, and the gas co-flow formed by the gas supplied from the first gas suction port and the second gas suction port flows along the linear jet flow between the linear jet stream and the inner surface of the flat flow path.

Linear jet stream, flat flow path, smallest cross section, combustion material, powder

Description

Ejection apparatus for gas-liquid mixtures {EJECTION DEVICE OF EJECTING GAS-LIQUID MIXED FLOW}

1 is a longitudinal sectional view showing a first embodiment of the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a longitudinal sectional view of the nozzle body;

4 is a left side view of the nozzle body;

5 is a longitudinal sectional view of the liquid injection part;

6 is a right side view of the liquid injection part;

7 is a left side view of the liquid injection part;

(Sign description)

1: injection device, 2: nozzle body, 3: liquid injection unit

4: space part, 5: end plate, 6: liquid nozzle part

7: Throttle part, 8: Line part 9: Minimum section part

10: jet flow, 11: gas co-flow, 12: external injection

13, 14: gas inlet, 15, 16: female thread

17: supply passage of pressurized liquid, 18: injection hole

19,20: main part, 21,22: ball insertion hole

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injector for injecting a flat gas-liquid mixed stream suitable for cleaning or peeling off contamination or other deposits adhering to the surface of an object.

With respect to such an injector of gas-liquid mixed streams, it is conventionally known to form a flat gas-liquid mixed stream by passing a liquid jet stream injected from a jet port of a pressurized liquid provided in an inner space and a gas flowing from a gas inlet through a flat mixing chamber. (See Unexamined Japanese Patent Application Laid-Open No. 53-18009). However, according to this conventional technique, although a flat gas-liquid mixture can be formed, there is a technical problem that the damping caused by contact between the periphery of the gas-liquid mixture and the inner surface of the flat mixing chamber is large and the injection speed is lowered. . In addition, there is a problem that it is difficult to form a flat gas-liquid mixture at a uniform flow rate due to partial deceleration occurring at the periphery of the flat mixed flow due to a resistance action based on contact with the inner surface of the mixing chamber.

The present invention has been invented in view of the above-described conventional technical situation, and has a liquid jet stream injected from a jet port of a pressurized liquid, and a jet stream and a flow path for forming a flat gas-liquid mixture stream while mixing gas from a gas suction port. An object of the present invention is to provide an injector for a gas-liquid mixed stream obtained by eliminating the resistance action caused by contact with the inner surface and reducing the lowering of the injection speed of the jet stream.

According to an aspect of the present invention, there is provided an apparatus for injecting a gas-liquid mixture, which forms and injects a gas-liquid mixture of liquid and gas, comprising: an injection hole for injecting a pressurized liquid; A flat flow passage disposed downstream of the injection port; A first gas suction port for forming an air stream around the pressurized liquid injection port by a negative pressure generated by the pressurized liquid; A second gas suction port disposed downstream of the first gas suction port outside the width direction of the linear jet stream formed by the pressurized liquid; And a gas co-flow formed by the gas supplied from the first gas suction port and the second gas suction port flows along the linear jet flow between the linear jet flow and the inner surface of the flat flow path.

Therefore, according to the present invention, as a result of largely canceling the resistance action due to contact with each inner surface of the flow path at the periphery of the flat jet stream by the gas co-current flow, the injection speed of the gas-liquid mixture flow resulting from these contact flows. The decrease in is also greatly reduced. Moreover, since the partial fall of the injection speed in the periphery of the injection stream is eliminated, it is possible to form a uniform flat gas-liquid mixture stream by the flow velocity. The minimum cross-sectional area may be provided in the middle of the flow path, and the upstream side of the minimum cross-sectional area may be gradually reduced in the direction orthogonal to the width direction of the jetting stream, and the downstream side may be expanded in the width direction.

The flat gas-liquid mixed stream formed by the injector according to the present invention is suitable for cleaning or peeling off contaminants or other deposits adhering to an object surface, but is not limited thereto. Where possible, it can be extended. The type of liquid used as the liquid liquid is not particularly limited as long as it can be sprayed, and an appropriate liquid such as a cleaning liquid to which additives such as surfactants are added in addition to water or hot water can be employed. There is no restriction | limiting in particular about gas, too, It is also possible to mix powdery bodies, such as a combustion material. In addition, the granular material, such as a combustion material, may be comprised so that it may supply from a supply port separate from a 1st gas suction port. There is no particular restriction as to the size and specific shape of the internal space in which the injection port of the pressurized liquid and the first gas suction port are installed, and gas-liquid mixture flow can be formed smoothly from the relationship with the flow path connected to the downstream side. . If a gap through which the gas flowing in from the second gas suction port can be secured is secured, the constitution can be directly connected to the injection port of the pressurized liquid. In addition, as to the specific configuration of the injection port of the pressurized liquid, it is sufficient that a flat liquid jet can be formed, and the cross section is a slit type or an elliptical jet, or a horizontal length is flat on the tip side of the circular flow path. It is also possible to form a groove.

The number and place of installation of the second gas suction port provided on the outer side in the width direction of the linear jet stream formed on the basis of the liquid jet stream from the jet port are formed by the gas flowing from the second gas suction port. Arbitrary setting is possible as long as it can be configured such that the jet stream does not directly contact each inner surface of the flow path by the gas co-flow. As for the flow path, for example, as in the following embodiments, a throttle portion in which the direction orthogonal to the width direction is gradually reduced in size is connected to a downstream side of the throttle portion, and the linear shape is gradually expanded in the width direction. It can be constructed from a part. In this case, the width direction of the throttle portion or the thickness direction of the linear portion may be a predetermined dimension or may be in the form of a throttle. In addition, as for the position of the minimum cross-sectional area where the flow path cross section is in the shape of a throat, the width of the jet flow becomes small near the injection port of the pressurized liquid, and the suction force of the gas is weakened. In addition, with respect to the linear portion constituting the flow path, the relationship between the wide angle and the wide angle of the linear jet streams formed on the basis of the liquid jet streams from the jet port, the outer surface of both sides of the jet stream and the linear part The gap between the two inner surfaces can be set to be gradually reduced toward the parallel or downstream side. Then, when the gap between both outer surfaces of the gas-liquid mixture and both inner surfaces of the linear portion is set to be gradually reduced toward the downstream side, the gap between the rear end of the linear liquid portion and the outside of the flat gas-liquid mixture flows outward is likely to occur. Excessive expansion can be suppressed.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described using drawing. 1 is a longitudinal sectional view showing an embodiment of the present invention, Figure 2 is a cross-sectional view A-A. 3 to 7 show each component used in the present embodiment, FIG. 3 is a longitudinal sectional view of the nozzle body, FIG. 4 is a left side view thereof, and FIG. 5 is a longitudinal sectional view of the fluid injection part. 6 shows the right side view, and FIG. 7 shows the left side view, respectively. As shown in Fig. 1 and Fig. 2, the gas-liquid mixture flow injector 1 according to the present embodiment has a liquid injection portion for pressurized liquid injection at the end of the nozzle body 2 constituting the injection portion of the gas-liquid mixture flow ( It is formed by installing 3). The nozzle body 2 is divided into two from the center portion, and is formed by integrally joining the portions 2a and 2b by welding or the like. It is comprised so that the space part 4 opened to the outside may be formed in the one edge part as shown in FIG. Then, as shown in FIG. 5, the liquid nozzle part 6 provided on one side of the end plate 5 of the liquid injection part 3 is inserted into the space part 4, and the liquid is supplied through the end plate 5. The injector 1 shown in FIGS. 1 and 2 is formed to fix the injector 3 to the end of the nozzle body 2.

As shown in FIG. 3, the nozzle body 2 which comprises the injection part of gas-liquid mixture flow has the space part 4 mentioned above at one end, and the downstream side of the space part 4 is shown in FIG. It is formed in a wide flat shape, and as shown in FIGS. 1 and 3, a throttle portion 7 having a throat shape is formed in a continuous tapered shape on the inclined surface of the space portion 4. Moreover, the height is formed in the downstream of the throttle part 7, and the linear part 8 formed so that the dimension of the width direction may become large gradually as shown in FIG. 2 is formed continuously. These throttle portions 7 and the linear portion 8 constitute a flat flow path, and the connection between these throttles 7 and the linear portion 8 constitutes the smallest cross-sectional portion 9 having the smallest cross-sectional area. . The position of the minimum cross-section 9 is based on the liquid jet flow from the liquid nozzle part 6, and the jet flow formed by catching the gas flowing from the first gas suction port in the liquid jet flow and changing it into a gas-liquid mixed flow ( Formation of gas co-current 11 formed between the jetting flow 10 and the respective inner surfaces of the shipboard portion 8 by the flow state of 10) and the gas flowing from the first and second gas suction ports Focusing on the state, it is set so that the external injection stream 12 made of flat gas-liquid mixture flow having a small speed decrease can be formed stably and efficiently.

In the present embodiment, as shown in Fig. 2, the gas suction ports 13 and 14 are formed in the part of the throttle portion 7 in the width direction outside of the jet stream 10, and these second gas suction ports are provided. By supplying the gas between the jet stream 10 and the inner surface of the ship 8, the flow rate of the gas co-current 11 formed by the gas flowing from the first gas suction port is effectively increased. It is set as the structure and has the characteristics as this invention in this respect. If the second gas suction port is not provided, the gas co-current 11 formed by the gas from the first gas suction port is caught by the injection stream 11 as it moves downstream, and the gas co-current 11 As a result, the periphery of the jet stream 10 comes into contact with the inner surface of the linear portion 8 downstream. In this regard, the second gas suction port is not limited to the case in which the throttle portion 7 is positioned to be outward in the width direction of the jet stream 10 as described above. For example, one or more communication holes, such as one or a plurality of communication holes provided through the nozzle body 2 in the transverse direction so as to communicate with the outside upstream or downstream of the minimum cross-sectional part 9, may be installed. Any hole may be employed as long as it can be opened out of the flow and gas can be supplied between the jet stream 10 and the inner surface of the ship 8. In addition, a portion of the space portion 4 formed at one end of the nozzle body 2 is formed in a rectangular cross section as shown in the left side view of FIG. 4, and on both sides of the nozzle portion 2, the end plate of the liquid injection portion 3 ( Female screws 15 and 16 are screwed into the fixing balls of 5).

As shown in Fig. 5, the liquid injection part 3 is provided with a supply path 17 of pressurized liquid along the axis, and the liquid nozzle part 6 is screwed to the downstream end thereof. In the case of the liquid nozzle part 6 of this embodiment, as shown in the left side view of FIG. 6, the flat injection hole 18 of elliptical shape etc. is formed so that the linear jet stream 10 suitable for the said linear part 8 may be formed. do. In this regard, in the injection hole 18 according to the present embodiment, as shown in FIG. 2, the width angle α of the width direction of the injection stream 10 injected from the injection hole 18 is the width of the linear portion 8. Direction, that is, it is set to be slightly larger than the width angle β between the inner circumferential surfaces 8a and 8b in the width direction of the linear portion 8, whereby both side outer surfaces of the jetting flow 10 and both sides of the linear portion 8 The gap S between the inner surfaces 8a and 8b is configured to gradually contract while moving toward the downstream side. In addition, as shown in FIG. 1, the jetting stream 10 is in contact with the inner surface of the linear portion 8 also with respect to the width angle of the direction orthogonal to the width direction of the jetting stream 10 injected from the jetting port 18. It is set not to.

The external shape of the liquid nozzle part 6 is formed in a hexagonal shape for the convenience of detachment to the end of the liquid injection part 3, and the other end of the liquid injection part 3 is for connection to the supply pipe of the pressurized liquid. A female screw was formed. In addition, the end plate 5 is integrally fixed to the liquid injection portion 3 by welding or the like, and the upper and lower portions are formed with recesses 19 and 20 having a rectangular cross section as shown in the left side view of FIG. It was. Fixing bolt insertion holes 21 and 22 are formed in the end plate 5 again. The fixing bolts (not shown) are inserted through these insertion holes 21 and 22 to form the nozzle body 2 side. By screwing and fastening to the female screw holes 15 and 16, the liquid spraying portion 3 is detachably fixed to the nozzle body 2 side through the end plate 5. Therefore, it is possible to perform the attachment adjustment while replacing the liquid nozzle part 6 by separating and separating the liquid injection part 3 from the nozzle body 2. In this embodiment, in the state where the end plate 5 is fixed to the nozzle body 2 side, the cross-section rectangular shape formed on the main body 19 and the nozzle body 2 side of the cross-section rectangular shape formed on the end plate 5 and the nozzle body 2 side is formed. The part where the space part 4 overlaps was opened so that the 1st suction port may be formed.

Therefore, in FIG. 1 and FIG. 2, when the pressurized liquid is supplied through the supply path 17 formed in the liquid spray unit 3, the pressurized liquid is sprayed from the injection port 18 of the liquid nozzle unit 6, and sprayed. At the same time as the flow 10 is formed, a gas co-current flow 11 surrounding the jet flow 10 is formed. The jet stream 10 injected from the jet port 18 of the liquid nozzle part 6 is a fine jet stream of liquid only immediately after the jet, but is separated from the jet port 18 along the wide angle α as shown in FIG. While gradually widening the injection width, in this embodiment, in the present embodiment, the main portions 19, 20 and the nozzle body 2 side formed on the end plate 5 by the injection action of the injection stream 10 itself. Gas such as air sucked through the first suction port formed by overlapping with the space portion 4 formed therein is caught and mixed, gradually forming a gas-liquid mixture flow, and finally a flat gas-liquid mixture flow from the nozzle body 2. It is injected as the external injection stream 12 of which is made. In addition, in this embodiment, since the throttle portion 7 is formed so that the minimum cross-sectional area 9 is provided, the suction force of the gas from the first suction port can be enhanced to promote the mixing of the gas into the jet stream 10. It is possible to form a jet stream of a more homogeneous high-speed gas-liquid mixture flow.

Further, as a feature of the present invention, the second gas suction ports 13 and 14 are formed outside the jet stream 10, and the gas sucked from these second gas suction ports 13 and 14 is prevented. Since the flow rate of the gas co-current 11 formed between the jetting flow 10 and the inner surface of the shipboard portion 8 is effectively increased, the direct contact between the injection stream 10 and the inner surface of the shipboard portion 8 is increased. As a result, the resistance effect against the injection stream 10 can be largely solved, and the fall of the injection speed of the peripheral part of the external injection stream 12 can be greatly reduced. 2, the width angle α in the width direction of the jet stream 10 is slightly smaller than the width angle β between the inner surfaces 8a and 8b in the width direction of the linear portion 8. If it is set to be large and the gap S between both outer surfaces of the injection stream 10 and both inner surfaces 8a and 8b of the shipboard portion 8 is set to be gradually reduced toward the downstream side, the nozzle body 2 is sprayed outward. The flat flow which can suppress a large area expansion to the outer side of both side parts of the flat external injection stream 12 to become can be formed.

According to the present invention, there is provided a first gas suction port for supplying gas to the injection port of the pressurized liquid, and a second gas suction port located outside the width direction of the linear jet stream formed based on the liquid jet stream, The gas flow formed by the gas flowing in from the first and second gas suction ports separates the jet stream from each inner surface of the flow path so as not to be in direct contact with each other. The resistance action due to contact with the inner surface can be largely solved, and the speed decrease of the injection stream can be greatly reduced. Moreover, since the partial fall of the injection speed in the peripheral part of the injection stream is eliminated, it becomes possible to form a uniform flat injection stream by the speed.

The present invention is not limited to the above embodiments and descriptions thereof, and various changes and modifications can be made by those skilled in the art without departing from the description and the claims.

Claims (6)

In the gas-liquid mixture flow injector for forming and injecting a gas-liquid mixture flow of liquid and gas, An injection hole for injecting a pressurized liquid; A flat flow passage disposed downstream of the injection port; A first gas suction port for forming an air stream around the pressurized liquid injection port by a negative pressure generated by the pressurized liquid; A second gas suction port disposed downstream of the first gas suction port outside the width direction of the linear jet stream formed by the pressurized liquid; Equipped, The gas co-current flow formed by the gas supplied from the first gas suction port and the second gas suction port flows along the linear jet flow between the linear jet flow and the inner surface of the flat flow path. Device. The method of claim 1, A minimum cross-sectional area is formed in the flat flow path, and the upstream side of the minimum cross-sectional area gradually decreases in a direction perpendicular to the width direction of the linear jet flow, and the downstream side of the minimum cross-sectional area travels in the width direction of the linear jet flow. Injector of gas-liquid mixture flow, characterized in that gradually increasing. The method of claim 2, The flat flow passage includes a throat-shaped throttle portion to be tapered to the minimum cross-sectional area, and a linear portion formed downstream of the throttle portion,  An injector for gas-liquid mixture flow, wherein the height of the line portion is constant and its width direction gradually increases. The method of claim 3, wherein Injector of gas-liquid mixture flow characterized in that the second gas suction port communicates with the throttle portion. The method of claim 3, wherein The widthwise width angle of the linear liquid jet stream is set to be larger than the width angle of the linear part, thereby gradually reducing the gap between the outer surface of the linear jet stream and the inner surface of the linear jet stream toward the downstream side. Injector of mixed flow. The method of claim 3, wherein An area angle in the direction perpendicular to the width direction of the linear jet flow is set so that the linear jet flow does not contact the inner surface of the linear jet.

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