JPH0821409A - Swirling flow generator in pipeline - Google Patents

Abstract

(57) [Abstract] [Purpose] By reducing the loss resistance of the fluid, a swirl flow is generated without significantly impairing the energy of the fluid to improve the foreign matter separation and removal function.
It eliminates the need for a separate power source and reduces the initial cost and running cost of the device. [Arrangement] An impeller receiver 3 is installed along a central axis C of the casing 2 in a casing 2 having a tubular shape with both ends open which is interposed in the passage 1. The passage is provided upstream of the impeller receiver 3 An upstream side impeller 4 that swirls with the fluid flowing in the inside 1 to convert the fluid into a swirling flow R1 toward the downstream side and discharges it is attached, and is discharged from the upstream side impeller 4 to the downstream side of the impeller receiver 3. A downstream side impeller 5 that discharges a swirling flow R2 that swirls with the swirling fluid R1 toward the downstream side is attached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swirl flow generating device in a pipeline.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a strainer accommodating chamber 52 having a strainer 51 therein is provided in a pipeline 50 for supplying seawater as cooling water to a heat exchange device. A valve 54 is provided in another flow passage 53 communicating with the downstream side of the pipe 54. A swirl flow is generated in the pipe 50 with the valve 54 opened to remove foreign matter in the seawater captured by the strainer 51. As a swirling flow generating device for separating and removing from the strainer 51 and taking it out to another flow path 53, there is, for example, a fluid swirling valve disclosed in Japanese Utility Model Publication No. 1-38377.

A fluid swirling valve of this type is shown in FIGS.
As shown in FIG. 5, the inner peripheral surface of the valve box 55 is formed so that the cross-sectional shape is substantially a true circle, and the plate-shaped valve bodies 56, 57 are formed in a pair of substantially half-ellipsoidal shapes. 11 is set to be larger than the inner diameter D of the valve box 55, and the short diameter 12 is set to be substantially equal to the inner diameter D. Then, the plate-shaped valve bodies 56 and 57 are
Two valve rods 58 and 59 are pierced through the valve box 55 so that they can be independently operated by different operating mechanisms 60 and 61, respectively, with a rotation axis C2 that is substantially orthogonal to the central axis C1 of the valve box 55. The plate-shaped valve bodies 56 and 57 are separately attached to the valve rods 58 and 59, and the plate-shaped valve bodies 56 and 57 are mounted so that the direction of the short diameter 12 is substantially coincident with the direction of the rotation axis C2.
The state where both are fully open along the central axis C1 and the state where both elliptical outer peripheral surfaces are inscribed in the inner surface of the valve box 55 over the entire circumference by inclining by 60 degrees on the opposite sides with respect to the central axis C1 It can be switched to and.

However, in the conventional swirling flow generating device including such a fluid swirling valve, the loss resistance of the fluid due to the plate-like valve bodies 56 and 57 is relatively large, the energy of the fluid is small, and the strainer is also small. The swirling flow necessary for separating and removing the foreign matter in the seawater captured by 51 cannot be obtained, and turbulent flow occurs. Therefore, it has a drawback that it is inferior in the function of removing and removing foreign matter. In addition, the operating mechanism 60, 6
Since a power source for operating 1 to operate the plate-shaped valve bodies 56, 57 is separately required, there is a drawback that the initial cost and the running cost increase.

[0005]

The problem to be solved is that the loss resistance of the fluid is relatively large, the energy of the fluid is small, and the foreign matter in the seawater captured by the strainer is removed. Since the swirling flow required to achieve this is not obtained, it is inferior in the function of separating and removing foreign matter, and
Since a separate power source is required, the initial cost and running cost are high.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an impeller receiver is installed along a central axis of the casing in a cylindrical casing having openings at both ends provided in a flow passage. Is attached to the upstream side impeller, which swirls with the fluid flowing in the flow path to convert the fluid into a swirling flow toward the downstream side and discharges the fluid, and is discharged from the upstream side impeller to the downstream side of the impeller receiver. The downstream impeller that swirls with the swirling fluid to discharge into a swirling flow toward the downstream side is attached, and the loss resistance of the fluid is reduced, and the energy possessed by the fluid is greatly impaired. In this way, a powerful swirl flow is generated to improve the function of removing and removing foreign matter, and the purpose of reducing the initial cost and running cost by eliminating the need for a separate power source is achieved.

[0007]

According to the present invention, when the fluid passes through the tubular casing, the upstream impeller is rotated by its own flowing energy and converted into a swirling flow that is biased toward the inner peripheral surface side of the tubular casing. And is discharged downstream. This swirl flow rotates the downstream impeller, increases swirl energy, and is discharged as a strong swirl flow biased toward the outer peripheral side of the flow path connected to the downstream side of the tubular casing.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention,
In this drawing, a swirling flow generation device 10 has an impeller receiver 3 installed along a central axis C of the casing 2 in a casing 2 having a tubular shape with openings at both ends provided in the flow path 1.
That is, the impeller receiver 3 is provided via the plurality of arms 3A, 3A.
Are mounted in the casing 2. This impeller receiver 3
An upstream side impeller 4 that swirls with the fluid flowing in the flow path 1 on the upstream side of the blade and converts the fluid into a swirling flow R1 toward the downstream side and discharges it is rotatably attached, and is downstream of the impeller receiver 3. The downstream side impeller 5 that swirls by the swirling flow R1 discharged from the upstream side impeller 4 and discharges into the swirling flow R2 toward the downstream side is attached to the side.

Next, an example of a usage state of the swirl flow generator 10 will be described. As shown in FIG. 2, a strainer accommodating chamber 7 in which a strainer 6 is installed is provided in the flow path 1 for supplying seawater as cooling water to a heat exchange device (not shown), and the strainer accommodating chamber 7 communicates with the downstream side of the strainer accommodating chamber 7. A valve 9 is provided in the other flow passage 8 and a swirl flow generation device 10 is provided in the flow passage 1 upstream of the strainer accommodating chamber 7. A valve 11 is provided immediately upstream of the swirl flow generation device 10, a bypass flow passage 12 is formed by bypassing the valve 11 and the swirl flow generation device 10, and a valve 13 is provided in the bypass flow passage 12. By constructing the flow path system having the above structure, the foreign matter in the seawater captured by the strainer 6 is separated and removed from the strainer 6 and the other flow path 8 is formed.
I am going to take it out.

That is, normally, the valves 9 and 11 are closed and the valve 13 is opened. As a result, the fluid flows into the strainer accommodating chamber 7 through the bypass passage 12 as indicated by the broken line arrow, and the strainer 6 traps foreign matter in the seawater and then supplies the heat exchanger.

On the other hand, when foreign matter in seawater captured by the strainer 6 is peeled off from the strainer 6 and taken out to another flow path 8, the valve 13 is closed and the valves 9 and 11 are opened. As a result, the fluid passes through the swirl flow generating device 10 and the strainer accommodating chamber 7 as shown by the solid line arrow to separate the flow path 8
Run down to.

When the fluid passes through the cylindrical casing 2 of the swirl flow generator 10, the downstream side impeller 4 is rotated by the flow-down energy, and the inner peripheral surface side of the cylindrical casing 2, that is, the outer periphery of the passage cross section. Swirling flow R1 biased to the side (Fig. 1
Reference) and is discharged to the downstream side. This swirling flow R
1, the downstream side impeller 5 is rotated, the swirling energy is increased, and the swirling flow R2 is biased toward the outer peripheral side of the flow path 1 connected to the downstream side of the cylindrical casing 2 and is swirled. The flow R2 flows into the strainer accommodating chamber 7, and the foreign matter in the seawater captured by the strainer 6 is removed from the strainer 6 and removed to another flow path 8.

As described above, since the upstream impeller 4 and the downstream impeller 5 are rotated by the energy of the fluid flowing down, the loss resistance of the fluid is lower than that of the conventional fluid swirling valve. Get smaller. Therefore, the powerful swirling flow R can be achieved without significantly impairing the energy of the fluid.
1, R2 can be generated. Moreover, the swirling flow R
1 flows into the strainer accommodating chamber 7 while being biased toward the outer peripheral side of the passage cross section in the tubular casing 2, and the swirling flow R2 is biased toward the outer peripheral side of the flow path 1 while flowing into the strainer housing chamber 7.
The foreign matter in seawater captured in 1 can be efficiently peeled and removed from the strainer 51, and the foreign matter peeling and removing function can be improved. Further, since a power source for turning the upstream side impeller 4 and the downstream side impeller 5 is not required, the initial cost and running cost of the device can be reduced.

[0014]

As described above, according to the present invention, when the fluid passes through the cylindrical casing, the upstream impeller is rotated by its own flowing energy so that the fluid flows to the inner peripheral surface side of the cylindrical casing. It is converted into an unbalanced swirling flow and discharged downstream, and this swirling flow rotates the downstream impeller and increases swirling energy to the outer peripheral side of the flow path connected to the downstream side of the tubular casing. Since the fluid is discharged as an unbalanced swirling flow, the loss resistance of the fluid becomes smaller than that of the conventional fluid swirling valve. Therefore, a strong swirling flow can be generated without significantly impairing the energy of the fluid. Moreover, since the swirling flow is biased toward the outer peripheral side of the passage cross section in the tubular casing, and the swirling flow is biased toward the outer peripheral side in the flow passage while flowing into the strainer housing chamber, it is trapped by the strainer. Foreign matter in seawater can be efficiently peeled and removed from the strainer, and the foreign matter peeling and removing function can be improved. Further, since there is no need for a power source for turning the upstream side impeller and the downstream side impeller, there is an effect that the initial cost and running cost of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a system diagram showing an example of a usage state of the present invention.

FIG. 3 is a system diagram showing a usage state of a conventional swirl flow generator.

FIG. 4 is a plan view of a conventional example.

FIG. 5 is a front view of FIG. 4;

[Explanation of symbols]

 1 flow path 2 casing 3 impeller receiver 4 upstream impeller 5 downstream impeller C central axis of casing R1 swirl flow R2 swirl flow

Claims (1)

[Claims] 1. An impeller bearing is installed along a central axis of the casing in a tubular casing having openings at both ends provided in the flow passage, and a fluid flowing in the flow passage upstream of the impeller bearing. An upstream impeller that swirls to convert the fluid into a swirling flow toward the downstream side and discharges the swirl flow is attached, and swirls by the swirling fluid discharged from the upstream impeller to the downstream side of the impeller receiver to downstream. A swirling flow generation device in a pipe line, characterized in that a downstream side impeller that discharges a swirling flow toward the side is attached.