KR20160045511A - Device of generating vortex and vortex flushing apparatus comprising the same and vortex flushing method using the same - Google Patents

Abstract

Provided in the present invention is a vortex generating device equipped with: a main body having an inflow hole for introducing a fluid and a discharge hole for discharging the fluid, and having a path in which the fluid flows; and at least one wing arranged on the inner side surface of the main body for converting the fluid which flows in the path of the main body to be flowed in a vortex form. Accordingly, the device is capable of easily removing foreign substances in a pipe, by generating the vortex in the fluid flowed by a simple structure and injecting the same in the pipe of equipment.

Description

TECHNICAL FIELD The present invention relates to a vortex generating device, a vortex flushing device having the vortex generating device and a vortex flushing method using the vortex generating device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vortex generating device for generating a vortex in a flowing fluid and a vortex flushing device for cleaning pipes provided in various facilities using the vortex flow type fluid, And more particularly, to a vortex flushing method for cleaning piping provided in a facility.

Various piping are included in the hydraulic equipment, the lubrication and the oil supply device provided in the equipment itself installed at the power plant, the ironworks, the shipyard, etc., or the mechanical device manufactured by such equipment. During the first installation of these facilities, or during the reassembly after disassembly, repair and cleaning after using such facilities for a certain period of time, slag, spatter, dust, fiber, . Such foreign materials may interfere with the efficient and smooth operation of the equipment, and sometimes cause a deadly malfunction, so it is necessary to remove them.

In order to remove foreign substances in the piping, chemicals may be used to clean the piping. However, such foreign substances are not completely removed by the cleaning using such chemicals, and in particular, foreign particles in the form of large granules are difficult to completely remove even by chemical cleaning.

In consideration of the above points, the slag, spatter, and the like incorporated in the pipe during the process of installing various facilities for the first time, or after the use of such facilities for a predetermined period of time after disassembling, repairing, It is necessary to completely eliminate the foreign matter which is not removed even by dust, fiber, casting sand or other foreign matter or chemical cleaning, thereby to prevent the failure of the equipment requiring precision and abrasion resistance and to improve the efficiency.

Korean Patent Application Publication No. 10-2013-0119120 Korean Patent Application Publication No. 2001-0045080

Conventionally, in a flushing unit as disclosed in Korean Patent Application Laid-Open No. 10-2013-0119120, flushing oil is circulated in a turbulent flow in a pipe by using a circulation pump to remove foreign matter. However, in such a conventional oil flushing unit, there is a limitation in raising the friction force of the oil in the pipe due to the turbulence by circulating the oil by simply using the pump, which is sufficient to remove the foreign substance in the pipe and discharge it to the outside There is a problem that can not exert its power.

Conventionally, a flushing apparatus as disclosed in Korean Patent Publication No. 2001-0045080 injects high-pressure air into an engine oil supplied to an engine through an air injector to generate turbulence, It was supposed to be removed. However, in such a conventional oil flushing apparatus, high-pressure air is blown into the oil through the air injector to generate turbulence, which limits the oil friction in the pipe. Therefore, foreign matter is removed from the pipe, There is a problem in that it is not possible to exert a sufficient force for discharging, and a separate device such as an air injector is added, resulting in a complicated configuration as a whole.

In consideration of the problems of the conventional flushing devices, a flushing device having a simple structure and capable of increasing the frictional force of the fluid enough to remove foreign substances from the pipe and discharge the same to the outside is needed.

According to a first aspect of the present invention, there is provided a fluid ejecting apparatus comprising: a main body having an inlet through which fluid flows and an outlet through which fluid is discharged, And at least one vane arranged at the inner side of the body to convert the fluid flowing in the passageway of the body to flow in a vortex shape. By generating a vortex in the fluid flowing by the simple structure and injecting it into the piping of the facility, foreign matter in the piping can be easily removed.

In the invention according to claim 2, since the cross-sectional area of the passage of the main body according to claim 1 becomes smaller as it goes from the inlet to the outlet, the flow velocity in the vortex shape of the fluid can be greatly increased, .

In the invention according to claim 3, since the wing according to claim 2 protrudes from the inner side surface of the main body and extends in the longitudinal direction of the main body, it is possible to generate vortices large and strong along the wings extending in the longitudinal direction of the main body .

In the invention according to claim 4, since the wing according to claim 3 protrudes at an acute angle with respect to a tangent plane including a point where it meets the inner side surface of the main body, it is possible to increase the force for flowing the fluid along the wing, . ≪ / RTI >

In the invention according to claim 5, since the line connecting the wings according to claim 3 with the inner side surface of the main body extends at an acute angle with respect to a line where the plane including the central axis in the longitudinal direction of the main body meets the inner side surface of the main body, So that the vortex flow can be formed more efficiently.

In the invention according to claim 6, since the height at which the wing according to claim 3 protrudes from the inner side surface of the body becomes smaller as it goes from the inlet to the outlet, the cross-sectional area of the passage forming the vortex, So that it can be easily advanced in the longitudinal direction of the main body toward the discharge port.

The invention according to claim 7 is characterized in that the length of the main body of the wing according to claim 3 extending in the longitudinal direction is proportional to the viscosity of the fluid passing through the main body. The higher the viscosity of the fluid, the more easily the vortex can be formed by the induction by the wing, and the lower the viscosity of the fluid, the more easily the vortex can be formed even if it is induced by the wing. Can be determined.

In the invention according to claim 8, since the vanes according to claim 1 are arranged so as to be symmetrical with each other on the inner side surface of the main body, symmetrical vortices can be generated in the main body, .

According to a ninth aspect of the present invention, there is provided a vortex flushing device connected to a piping of a facility for removing foreign substances in the piping by flowing a fluid in a vortex form in the piping, the vortex flushing device comprising the vortex generating device according to any one of claims 1 to 8 To provide a vortex flushing device. This makes it possible to increase the friction between the fluid flowing in the vortex shape and the piping of the equipment and thus to easily remove the slag, spatter, dust, fiber, molding sand and other foreign matter which may exist in the piping of the facility Particularly, it is possible to easily remove foreign matter from large pellets which are not removed even by chemical cleaning, and also to easily remove foreign substances which are present in a portion where the cross-sectional area of the piping is expanded, do.

In the invention according to claim 10, since the vortex generating device according to claim 9 allows the fluid to flow in a vortex shape advancing in the longitudinal direction of the pipe while rotating around the central axis parallel to the longitudinal direction of the pipe in the pipe, It is possible to greatly improve the efficiency of foreign matter removal.

The invention described in claim 11 provides a vortex flushing method for removing foreign matter in a piping by using a vortex flushing device as set forth in claim 10 or claim 11 to flow the fluid in a vortex form in the piping of the facility. It is possible to provide a flushing method capable of easily removing foreign substances that may be present in a piping of a facility by generating a fluid flowing in a vortex shape to increase the frictional force between the fluid and the piping of the facility.

The vortex generating device, the vortex flushing device and the vortex flushing method using the vortex generating device according to the present invention can increase the friction force with the piping of the facility by allowing the fluid to flow in a vortex form, To be removed.

1 is a perspective view showing a vortex generator as an exemplary embodiment;
2 is a front view showing the vortex generator of FIG.
Fig. 3 is a perspective view showing the wing of Fig. 1;
4 is a front view showing a vortex generating device as another exemplary embodiment;
5 is a view showing an operating state of a vortex generating device according to still another exemplary embodiment.
6 is a schematic diagram illustrating a vortex flushing apparatus with a vortex generator as yet another exemplary embodiment.

Specific details for carrying out the invention are described on the basis of practical examples. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept as defined by the appended claims. The present invention is not limited to the following embodiments.

(Example 1)

The present embodiment relates to a vortex generating device 100 having a main body 110 and a vane 120, as exemplarily shown in Fig.

The vortex generator 100 is a device for generating a vortex (vortex). Here, the vortex refers to a flow in which the fluid rotates as a whole around the center line of the fluid along the main moving direction of the fluid such as oil. Therefore, the vortex generating device is a device for causing the fluid to rotate as a whole around the center line of the fluid along the main moving direction of the fluid. As long as the fluid has a whole rotating axis around the center line of the fluid along the main direction of movement of the fluid, the fluid may not make a complete revolution around the centerline, and even if the fluid does not have a partially rotating flow, Do. It is also possible to have a flow different from the flow in which the fluid rotates as a whole about the center line of the fluid along the main moving direction of the fluid.

The vortex generator 100 includes a rotational motion component in a linear motion of the fluid. The fluid includes various materials having viscosity including oil. The fluid may be liquid or vapor, but liquid is generally preferred. Fluids can be various materials with viscosity. For example, the fluid may have a viscosity of 5 Pa · s to 70 Pa · s.

The body 110 has an inlet 111 through which the fluid flows and an outlet 112 through which the fluid flows and has a passage 113 through which the fluid flows. As shown in FIG. 1, the fluid flows into the inlet 111 in the direction of the arrow, flows along the passage 113, and is discharged into the outlet 112 in the direction of the arrow. The fluid flows along the inflow direction of the fluid, for example, along the longitudinal direction of the passage 113, by the external pressure applied along the inflow direction of the fluid, for example, along the longitudinal direction of the passage 113. [ Perform a linear motion. Thereafter, the fluid has a component that rotates about the central axis of the fluid along the fluid moving direction, for example, the central axis in the longitudinal direction of the passage 113 in the process of moving along the passage 113. [ The fluid having the component that rotates in this way flows as a vortex as a whole when the fluid is discharged to the discharge port 112. In this process, the fluid may flow partially in the form of laminar flow or turbulent flow rather than in vortex form, but as a whole it flows in a vortex form. The reason why the fluid partially flows in a laminar flow or a turbulent flow can be attributed to the characteristics such as the viscosity of the fluid or the characteristics of the inner surface of the main body 110.

The cross-sectional area of the passage 113 of the main body 110 may be variously formed. For example, the passageway 113 of the body 110 may be formed to have a constant cross-sectional area from the inlet 111 to the outlet 113, or alternatively may be formed as an outlet 111 at the inlet 111, Sectional area that becomes smaller as the distance from the center of gravity to the center of gravity 113 increases. When the passage 113 of the main body 110 is formed to have a constant transverse sectional area from the inlet 111 to the outlet 113, the wings 120 formed on the inner surface of the main body 110 in the passage 113, The flow velocity and the rotation speed of the wing 120 are higher than those of the general passage without the wing 120. [ When the passageway 113 of the main body 110 is formed to have a cross sectional area reduced from the inlet 111 to the outlet 113, The flow velocity and the rotation speed of the fluid increase more greatly than the general passage without the vanes 120 due to the change in the cross sectional area of the passage 113 as well as the flow passage.

The wings 120 are arranged on the inner side of the main body 110 to convert the fluid flowing in the passages 113 of the main body 110 to flow in a vortex form. The wing 120 may have a variety of structures as long as it converts the fluid flowing along the longitudinal direction of the passage 113 to flow in the form of a vortex. For example, the wings 120 may protrude from the inner side of the body 110 and extend in the longitudinal direction of the body 110, as illustrated in FIG. 1 or FIG. Thus, the fluid can flow long along the blade 120 extending in the longitudinal direction of the main body 110, so that the vortex can be generated large and strong in the flow of the fluid.

The wings 120 may have a variety of structures. For example, the vane 120 may include a guide portion 121 for guiding the flow of the fluid in contact with the fluid and a coupling portion for coupling the vane 120 to the main body 110 122 may be provided. The guide portion 121 guides the fluid to flow while rotating about the central axis along the direction of movement of the fluid without disturbing the movement of the fluid along the direction of movement of the fluid. The height h1 of the guiding portion 121 at the front end portion 121a at which the fluid first comes into contact with the guiding portion 121 is determined by the height h1 of the guiding portion 121 at the rear end portion 121b at which the fluid is separated from the guiding portion 121 It is preferable that the height h2 of the guide portion 121 is larger than the height h2 of the guide portion 121. Further, it is more preferable that the height of the guide portion 121 decreases from the tip portion 121a to the rear end portion 121b. Particularly, when the cross-sectional area of the passageway 113 of the main body 110 is reduced from the inlet 111 to the outlet 112 as shown in FIG. 1, So that the fluid forming the main body 110 can be easily advanced in the longitudinal direction of the main body 110.

The thickness t of the guide portion 121 may be varied. For example, the thickness t of the guide portion 121 may be constant. Or the thickness t of the guide portion 121 may be set such that the fluid does not interfere with the movement of the fluid along the direction of movement of the fluid, It is preferable that the thickness of the guide portion 121 at the distal end portion 121a is made thicker than the thickness of the guide portion 121 at the rear end portion 121b in order to guide the rotation while flowing, It is more preferable that the thickness becomes thicker toward the center portion and becomes smaller from the central portion toward the rear end portion 121b.

The surface 121c of the guide portion 121 may be formed as a flat surface or a curved surface. The surface 121c of the guide 121 may be inclined with respect to the inner surface of the main body 110 so as to facilitate the formation of rotational motion of the fluid.

3, the engaging portion 122 is arranged at a position opposite to the surface 121c of the guiding portion 121 to guide the guiding portion 121 to the inner surface of the main body 110 Lt; / RTI > To this end, the coupling portion 122 is integrally or detachably coupled to the guide portion 121 at one side and is integrally or detachably coupled to the inner side surface of the main body 110 at the other side by welding, fitting or the like. A groove (not shown) may be formed on the inner surface of the main body 110 to receive the engaging portion 122 therein. The length of the coupling portion 122 may be variously formed. For example, the length of the coupling portion 122 may be equal to the length of the guide portion 121, as shown in FIG. 3, but may be smaller than the length of the guide portion 121.

The length l of the wings 120 can be varied. For example, the length l of the wing 120 may be equal to or less than the length of the body 110. Alternatively, both ends in the longitudinal direction of the wing 120 are arranged so as to coincide with both longitudinal ends of the body 110, as illustrated in FIG. 1 or 2, 110 so that the length of the vanes 120 may be slightly longer than the length of the main body 110.

The length l of the wing 120 may also vary depending on the viscosity of the fluid flowing through the passageway 113 of the body 110. For example, the length of the wings 120 extending in the longitudinal direction of the body 110 may be proportional to the viscosity of the fluid passing through the body 110. That is, the higher the viscosity of the fluid, the longer the swirl can be induced by the swirl 120, and the swirl can be easily formed even if the viscosity of the fluid is lowered by the swirl 120 The optimum blade 120 length can be determined according to the viscosity of the fluid. For example, the relationship between the viscosity of the fluid and the ratio of the length of the wing to the length of the body can be determined as shown in Table 1 below.

Viscosity of the fluid (Pa · s) 8 10 32 46 68 Ratio of blade length to body length (%) 45 to 50 50 75 ~ 85 90 ~ 95 90 ~ 95

The wings 120 may be formed to extend in various directions with respect to the longitudinal direction of the main body 110. For example, the wings 120 may be formed to extend in the same direction as the longitudinal direction of the main body 110, but may be formed at a predetermined angle with respect to the longitudinal direction of the main body 110 As shown in Fig. The line m in which the wing 120 meets the inner side surface of the main body 110 in the latter case is a line that is parallel to the line where the plane including the central axis C in the longitudinal direction of the main body 110 meets the inner side surface of the main body 110 (n). < / RTI > In this case, the fluid flowing along the wing 120 can easily receive the force in the direction of rotating about the center axis C of the main body 110, so that the vortex can be formed more efficiently.

The wings 120 may be formed to protrude in various directions with respect to the inner side surface of the main body 110. For example, the wings 120 may be formed to protrude in a direction perpendicular to the inner side surface of the main body 110, as illustrated in FIG.

The wings 120 may be arranged on the inner side of the body 110 at least one or more. For example, the wings 120 may be arranged on the inner side of the main body 110, but may be arranged in a plurality of five, for example, as shown in FIG. In the latter case, the plurality of blades 120 may be arranged so as to be symmetrical with each other on the inner side surface of the main body 110. In this case, a vortex that flows symmetrically around the center axis C in the main body 110 can be generated, so that the vortex can be maintained even to a remote place of the facility piping.

(Practical example 2)

The present embodiment is characterized in that the wings are formed so as to protrude at a predetermined angle from the direction perpendicular to the inner side surface of the main body in the first embodiment. For example, in the vortex generator 200 of the present embodiment, as shown in FIG. 4 as an example, the vanes 220 have an acute angle? With respect to a direction perpendicular to the inner side surface of the main body 210, . In this case, the wing 220 may protrude at an acute angle β with respect to a tangential plane (not shown) including a point at which the wing 220 meets the inner side surface of the main body 210. When the fluid flows along the wing toward the discharge port 212 from the inlet 211 of the main body 210 due to the inclined structure of the wing 220, the force that rotates about the center axis C 'of the main body 210 Can be made larger so that a stronger vortex can be generated.

(Example 3)

In this embodiment, a vortex flow is generated in a state where the vortex flushing apparatus equipped with the vortex generator is coupled to the piping of the facility, and the vortex is injected into the piping of the facility. 5, the vortex generator 300 is coupled to the vortex flushing device 370 at the inlet 311 of the fluid and to the vortex flushing device 370 at the outlet 312 of the vortex 330, respectively.

The vortex generator 300 forms a coupling 350 that is coupled to the vortex flushing device 370 at the inlet 311. Here, the engaging portion 350 may be formed by welding or the like. However, the joining portion 350 may be formed by various other methods other than welding. The vortex generator 300 forms an engaging portion 340 coupled to the piping 330 of the facility at the discharge port 312. Here, the coupling portion 340 may be formed by a flange or the like. However, the coupling portion 340 may be formed by various other methods other than the flange. The discharge port 312 has a cross sectional area smaller than that of the inlet port 311 so that the pressure of the fluid becomes higher so that the engaging part 340 is formed through a means such as a flange to increase the coupling force at the discharge port 312 desirable.

The fluid introduced into the inlet 311 of the vortex generator 300 along the direction of the arrow in the vortex flushing device 370 passes through the passageway 313 of the main body 310 of the vortex generator 300, Along the plurality of vanes 320 installed on the inner side surface of the passage 313, the vortex is formed by obtaining a motion component in the rotating direction about the central axis X of the passage 313 in the longitudinal direction. The vortex 360 formed by the vortex generator 300 flows along the piping 330 of the facility and generates the drag 370 on the inner side of the pipeline 330 so as to accumulate And other foreign matter floating on the passage of the pipe 330 flows along the pipe 330 along with the fluid and is discharged to the outside to remove the foreign substance such as dust, do.

The fluid flowing in the form of the vortex 360 by the vortex generator 300 rotates about the central axis X in the longitudinal direction of the piping 330 of the facility while the main flow rotates about the center of the pipe 330), the efficiency of removing and discharging foreign matter from the pipe 330 compared to a fluid, in which the main flow only moves in the longitudinal direction of the piping 330 of the installation or only partially in the turbulent flow form in a part of the fluid . In particular, the eddy currents of these fluids are effective in removing foreign matter from large pellets which are difficult to remove even by chemical cleaning. The effect of the fluid flowing in this vortex shape is not only obtained by the vortex flow formed by the vortex generator of this embodiment but also by the vortex flow formed by the vortex generator of the present invention.

(Example 4)

The present embodiment relates to a vortex flushing apparatus having a vortex generator and a vortex flushing method using the same.

The vortex flushing apparatus of the present embodiment exemplarily includes a storage tank 460 and a circulation pump 471, a vortex generation apparatus 400 and a filter 483, And wirings 410 and 420 may be provided.

The storage tank 460 is a tank for storing the fluid. In the storage tank 460, a heating unit 461 such as an electric heater is installed to facilitate the flow of the fluid by applying heat to the stored fluid. In particular, in the case of a fluid such as oil, it is necessary to adjust the viscosity in order to secure an appropriate fluidity. The viscosity of the oil can be controlled by adjusting the heating portion 461.

The circulation pump 471 is connected to the storage tank 460 to transfer the fluid stored in the storage tank 460 to the vortex generator 400. The circulation pump may be composed of one pump, but may be composed of a plurality of pumps in order to increase the efficiency.

A vacuum pump 473 may further be connected to the storage tank 460. The vacuum pump 473 may be installed to remove water present in the storage tank 460.

The fluid separated from the storage tank 460 by the circulation pump 473 is supplied to the vortex generator 400 through the wiring 410. The vortex generator 400 may be any vortex generator of the present invention including vortex generators in the above embodiments. The vortex generator 400 is connected to the piping 431 of the facility 430. The vortex generating device 400 may be a single device, but it is preferable that the vortex generating device 400 comprises a plurality of devices, one for each of a plurality of pipes 431 of the equipment 430.

The fluid discharged through the piping 431 of the facility 430 is returned to the storage tank 460 through the wiring 420. At this time, the fluid is filtered through the filter 483 before being recovered to the storage tank 460, thereby filtering the foreign matter removed from the pipe 431. The fluid having passed through the filter 483 is passed through the micro filter 481 once again, so that even a small foreign matter left in the fluid can be completely filtered even after passing through the filter 483. [

The state of the filtered fluid can be checked by providing a glass window 490 made of glass or the like on the wiring connecting the microfilter 481 and the storage tank 460.

In the vortex flushing method using the vortex flushing apparatus having the vortex generating apparatus 400 described above, first, the moisture contained in the fluid stored in the storage tank 460 is removed by operating the vacuum pump 473, 461 are operated to increase the temperature of the fluid to adjust the viscosity so as to have a predetermined fluidity. Then, the circulation pump 471 is operated to transfer the fluid to the plurality of vortex generators 400 through the wiring 410. The fluid thus transferred is converted into a fluid flowing in a vortex shape through each vortex generator 400. At this time, a predetermined vortex shape can be generated by controlling vanes (not shown) installed in the vortex generator 400. The fluid converted into the eddy current is injected into each pipe 431 of the facility 430 to remove various foreign substances present in the pipe 431, particularly foreign substances remaining after chemical cleaning, from the pipe 431, . The fluid containing the foreign matter is then discharged from the piping 431 of the facility 430 and transferred to the filter 483 through the wiring 420. The foreign matter contained in the fluid is mostly removed through the filter 483. The fluid passing through the filter 483 passes through the microfilter 481 again, whereby the foreign matter contained in the fluid not removed by the filter 483 is removed. Thus, the fluid having completely removed the foreign substance can be confirmed through the glass window 490. The fluid is then returned to the storage tank 460 and used again for subsequent cleaning. By repeating this process, it is possible to surely and efficiently remove the foreign substances present in the pipes 431 of the facility 430. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Is possible. Accordingly, the scope of protection of the present invention is defined by the technical idea of the appended claims.

The present invention relates to a vortex generating device for generating a vortex in a flowing fluid, or a vortex flushing device for cleaning pipes provided in various facilities using a fluid flowing in a vortex form, Flushing method for cleaning the piping.

100, 200, 300, 400: vortex generators
110, 210 and 310:
111, 211, 311: inlet
112, 212, 312:
113, 213, 313: passage
120, 220, 320: wing
330, 431: Piping
340: Flange
360: Vortex
370: vortex flushing device
410, 420: Wiring
430: Equipment
460: Storage tank
461:
471: circulation pump
483: Filter

Claims (11)

A body having an inlet through which the fluid flows and an outlet through which the fluid flows and has a passage through which the fluid flows; And
And at least one vane arranged on the inner side of the body for converting the fluid flowing in the passageway of the body to flow in a vortex form. The vortex generator of claim 1, wherein the cross-sectional area of the passageway of the body decreases from the inlet to the outlet. The vortex generator according to claim 2, wherein the vanes protrude from the inner side surface of the body and extend in the longitudinal direction of the body. The vortex generator of claim 3, wherein the vanes project at an acute angle to a tangent plane that includes a point of intersection with an interior side of the body. 4. The vortex generating device of claim 3, wherein the vanes extend at an acute angle with respect to a line that meets the inner side of the body, the plane including the longitudinal center axis of the body intersecting the inner side surface of the body. The vortex generator according to claim 3, wherein the height of the vanes protruding from the inner side surface of the main body is reduced from the inlet to the outlet. 4. The vortex generating device of claim 3, wherein the length of the wing body in the longitudinal direction is proportional to the viscosity of the fluid passing through the body. The vortex generator according to claim 1, wherein the vanes are arranged in a plurality of symmetrical directions on the inner side surface of the main body. A vortex flushing device connected to a piping of a facility for removing foreign matter in the piping by flowing fluid in a vortex form in the piping,
A vortex flushing device comprising the vortex generating device according to any one of claims 1 to 8. The vortex flushing device according to claim 9, wherein the vortex generating device causes the fluid to flow in the form of a vortex advancing in the longitudinal direction of the pipe while rotating around a central axis parallel to the longitudinal direction of the pipe in the pipe. A vortex flushing method for removing foreign matter in a piping by flowing a fluid in a vortex form in a piping of a facility using the vortex flushing apparatus according to claim 10 or 11.

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