JP2001090170A - Whirl flow pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a whirl flow pipe capable of preventing refuse from being clogged in the whire flow pipe and easily removing the refuse even if the refuse is clogged. SOLUTION: This whirl flow pipe 7 comprises a whirl guide plate 10 within a vertical pipe 9 to guide a fluid flowing from the upper end to the lower part with whirling. The whirl guide plate 10 is insertable and drawable to the vertical pipe 9, and a clearance of about 1-5% of the inside diameter of the vertical pipe 9 is provided between the vertical pipe 9 and the whirl guide plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swirling flow tube, and more particularly, to preventing a dust from being clogged in a swirling flow tube. The present invention relates to a swirling flow tube which can be easily removed.

[0002]

2. Description of the Related Art In order to eliminate inundation damage caused by rainwater in urban areas, a part of rainwater during heavy rain is temporarily stored in a large storage room provided underground, and when the water level of a river drops, There is a plan for a flood countermeasure where the water stored in the storage room is pumped up and discharged to the river.

[0003] In the above-mentioned inundation countermeasure facility, a structure for guiding water for 100 to 200 m between a water collecting pipe for collecting rainwater and a connecting pipe communicating with a storage room provided deep underground to drop water, Swirling flow tubes are being considered.

FIG. 9 shows an example of a swirling flow pipe. A vertical pipe 2 having an upper end connected to a liquid collecting pipe 1 for sending a fluid such as rainwater from a diversion facility (not shown) and extending downward is provided. A swirling flow pipe 4 is formed by integrally providing a swirling guide plate 3 inside the vertical pipe 2, and a lower end of the swirling flow pipe 4 is connected to a connecting pipe 6 extending in a horizontal direction and communicating with a storage chamber 5. Connected.

Conventionally, the manufacture of the above-mentioned swirling flow tube 4 is performed by using the vertical tube 2
When the diameter of the vertical pipe 2 is large, an operator enters the inside of the vertical pipe 2 and the swiveling guide plate 3 is fixed to the inner surface of the vertical pipe 2 by welding. The turning guide plate 3 is fixed to the inner surface of the vertical pipe 2 by welding within a range where a worker's hand can enter from both ends of the vertical pipe 2.

In the swirling flow tube 4, when a fluid such as rainwater flows in from the liquid collecting tube 1 at the upper end, the fluid is swirled by the swirling guide plate 3 provided inside the swirling flow tube 4, and swirling is performed. In this state, the fluid flows down to the lower end of the swirling flow pipe 4, is discharged from the lower end of the swirling flow pipe 4 to the connection pipe 6, and the fluid discharged to the connection pipe 6 is guided to the storage chamber 5 and stored.

As described above, when the fluid is swirled by the swirling flow pipe 4 and caused to flow down, the falling energy of the fluid can be reduced, and therefore the fluid discharged from the swirling flow pipe 4 to the connection pipe 6 can be reduced. The impact force at the drop landing portion can be reduced, and a large amount of fluid can flow smoothly into the storage chamber 5 via the connection pipe 6 in a short time.

[0008]

However, the conventional swirling flow tube 4 shown in FIG. 9 has an integral structure in which the swirling guide plate 3 is fixed to the inner surface of the vertical tube 2 by welding. There is a problem that dust such as vinyl and wire is easily caught in the corner between the turning guide plate 2 and the turning guide plate 3.
In particular, as in the case of the vertical pipe 2 having a small diameter,
In the configuration in which only the both ends of the swirl guide plate 3 disposed inside are fixed to the inner surface of the vertical tube 2, a portion where the vertical tube 2 and the swivel guide plate 3 are not fixed at the longitudinal middle part of the swirl flow tube 4. There is a problem that garbage is easily caught.

Further, it is easy for extraneous matter to adhere to the corners of the vertical pipe 2 and the swirl guide plate 3, and other foreign matter is further entangled with the caught dust, and is deposited in the swirl flow pipe 4. The function of the swirling flow tube 4 is degraded by obstructing the formation of the swirling flow, or the swallowing amount of the fluid of the swirling flow tube 4 is reduced. In the worst case, the swirling flow tube 4 is clogged with dust. Had the potential to

For this reason, a swirling flow tube has been developed which can reduce the problem of clogging of the swirling flow tube 4 with dust and the like, and can easily remove dust and restore normal functions even when clogging occurs. Was desired.

The present invention has been made in view of the above-mentioned circumstances, and prevents dust from being clogged in the swirling flow tube, and even if clogged with dust, the dust can be easily removed. It is an object to provide a swirling flow tube.

[0012]

SUMMARY OF THE INVENTION The present invention relates to a swirling flow tube provided with a swirling guide plate inside a vertical tube so as to swirl a fluid flowing from an upper end and guide the fluid to a lower portion. A swirling flow tube, characterized in that the swirling guide plate is provided so as to be able to be inserted and removed, and a gap of approximately 1 to 5% of the inner diameter of the vertical tube is provided between the vertical tube and the swirling guide plate. is there.

In the above embodiment, a grating material having a mesh equal to or smaller than a gap between the vertical pipe and the turning guide plate may be provided on the upper portion of the vertical pipe, and the turning guide plate may have a center pipe. The lower part of the central pipe is supported by a fixed frame provided on the lower part inside the vertical pipe, and the upper part of the central pipe is supported on the upper part of the vertical pipe by a support frame provided on the upper part of the central pipe. May be provided with a hanging piece, and further, an air vent may be provided at a lower portion of the central pipe, and the central pipe may constitute an air vent structure.

According to the above means, the following effects can be obtained.

Since a gap of about 1 to 5% with respect to the inner diameter of the vertical pipe is formed between the inner surface of the vertical pipe and the turning guide plate, vinyl, wire, or the like is formed at the corner between the vertical pipe and the turning guide plate. The problem that garbage is caught can be prevented.

Further, since it is possible to prevent the deposits from adhering to the corners between the vertical pipe and the swirl guide plate, the trapped dust and sediment hinder the formation of the swirl flow in the swirl flow pipe, The function of the swirling flow tube, such as reducing the swallowing amount of the fluid, can be prevented, and the swirling flow tube can be prevented from being clogged with dust.

Further, if a meshing material having a mesh equal to or smaller than the gap is provided at the upper part of the swirling flow tube, dust larger than the gap between the inner surface of the vertical pipe and the swirling guide plate is prevented from flowing into the swirling flow tube. Thus, the problem of clogging of the swirling flow tube with dust can be more reliably prevented.

Further, even in the event that the swirl flow tube becomes clogged with dust or the like, the swivel guide plate can be inserted into and removed from the vertical tube. The maintenance for removing dust and the like can be easily performed.

If an air vent is provided at the lower part of the central pipe and the air vent is constituted by the central pipe, the air entrapped in the fluid flowing down while rotating in the swirling flow pipe is discharged to the upper part through the central pipe. Therefore, the air mixing rate in the fluid discharged to the connection pipe is reduced, and the amount of air guided to the storage chamber is reduced, so that the amount of liquid stored in the storage chamber can be increased.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 show an embodiment of the present invention. The swirling flow pipe 7 shown in FIGS. 1 to 5 is open at the upper end and extends downward, and the lower end is connected to the connecting pipe 6. A vertical guide 9 is provided, and a turning guide plate 10 is inserted into the vertical pipe 9.

An inflow chamber 11 having a concrete structure is formed above the upper end opening 8 of the vertical pipe 9, and an introduction chamber 13 is formed at a side of the inflow chamber 11 with a weir 12 interposed therebetween.
The liquid collection pipe 1 that sends fluid such as rainwater from a water separation facility (not shown) is connected to the introduction chamber 13. 14 in the figure
Is a guide plate insertion port provided at an upper position of the vertical pipe 9 in the inflow chamber 11, 15 is a manhole provided above the introduction chamber 13, and the guide plate insertion port 14 and the manhole 15 are usually lids. It is designed to be closed. 1 and 4, the outer periphery of the vertical pipe 9 is also surrounded by concrete.

The turning guide plate 10 includes a central pipe 1 provided at the center.
The lower end of the center tube 16 is fitted to a fitting portion 18 provided at the center of a horizontal cross-shaped fixed frame 17 provided at the lower portion inside the vertical tube 9. Supported by Also, the upper part of the central tube 16 is
A support frame 20 is attached to the central pipe 16 in the cross direction by bolts 19, and the support frame 20 is fixed to a step 21 formed on the bottom surface of the inflow chamber 11 by bolts 22 so that the support frame 20 abuts on the upper end of the vertical pipe 9. We support by doing.

The upper end of the center tube 16 extends to the upper inside position of the inflow chamber 11, and the upper end of the center tube 16 has
3 are attached. Therefore, the lifting piece 23 is lifted by a crane 24 or the like as shown in FIG.
Through the vertical pipe 9.

As described above, the lower part is the fixed frame 17.
Is supported by the vertical pipe 9, and the upper part is a support frame 20.
The swivel guide plate 10 fixed to the bottom of the inflow chamber 11 thereby forms a required gap S between itself and the inner surface of the vertical pipe 9 as shown in FIG.

The gap S is preferably about 1 to 5% of the inner diameter of the vertical pipe 9, and more preferably about 3%. For example, in the case of the vertical pipe 9 having an inner diameter of 1 meter, a gap S of about 1 cm to 5 cm, preferably about 3 cm is formed between the turning guide plate 10 and the vertical pipe 9.

The center tube 16 is provided with an air vent 25 at the lower part, whereby the center tube 16 constitutes an air vent structure 26 for discharging air taken in from the air vent 25 into the inflow chamber 11 from the upper end. are doing.

At the bottom of the inflow chamber 11 above the vertical pipe 9, a grating material 27 is provided so as to penetrate the central pipe 16 so as to cover the opening 8 of the vertical pipe 9. As shown in FIG. 3, the grating material 27 has a mesh equal to or smaller than the gap S between the vertical pipe 9 and the turning guide plate 10.

Next, the operation of the above embodiment will be described.

In the configuration shown in FIGS. 1 to 5, fluid such as rainwater from a diversion facility (not shown) is supplied to the introduction chamber 13 through the collection pipe 1.
After the solid matter such as stones is separated in the introduction chamber 13, the solid matter flows into the inflow chamber 11 via the weir 12 and flows into the swirl flow pipe 7 from the inflow chamber 11.

The fluid that has flowed into the swirl pipe 7 is swirled by a swirl guide plate 10 provided inside the vertical pipe 9 and flows down the swirl pipe 7 while the swirl flow is maintained. The falling energy of the fluid is reduced and discharged from the lower end of the swirling flow pipe 7 to the connection pipe 6.

At this time, since the air vent 25 is provided in the lower part of the central pipe 16 integral with the swirl guide plate 10, the central pipe 16 constitutes the air vent structure 26. The air entrained in the fluid is transferred to the central tube 16.
Can be discharged to the inflow chamber 11 via the Accordingly, the air mixing rate in the fluid discharged to the connection pipe 6 is reduced, so that the amount of air guided to the storage chamber via the connection pipe 6 decreases, and the amount of liquid stored in the storage chamber can be increased.

A required clearance S is formed between the turning guide plate 10 and the inner surface of the vertical pipe 9 as shown in FIG.
Since the gap S is set to be approximately 1 to 5% with respect to the inner diameter of the vertical pipe 9, it is possible to prevent a problem that dust such as vinyl or wire is caught at a corner between the vertical pipe 9 and the turning guide plate 10. In addition, since it is possible to prevent the attachments from adhering to the corners between the vertical pipe 9 and the swirl guide plate 10, the formation of the swirl flow in the swirl flow pipe 7 by the caught dust and the sediment may be prevented, and the swirl may be prevented. The function of the swirling flow tube, such as reducing the amount of fluid swallowed by the flow tube, is not reduced, and the problem that the swirling flow tube 7 is clogged with dust can be prevented.

Further, at this time, since the grating material 27 having a mesh equal to or smaller than the gap S is provided at the upper end of the swirling flow tube 7 as shown in FIG. Dust larger than the gap S between the inner surface and the inner surface is prevented from flowing into the swirl flow pipe 7, whereby the problem of clogging of the swirl flow pipe 7 with dust can be more reliably prevented.

If the gap S formed between the inner surface of the vertical pipe 9 and the turning guide plate 10 is too small, clogging of dust easily occurs. If the gap S is too large, fluid leaks through the gap S to the lower part. Therefore, the formation of the swirling flow may be adversely affected.

The following test was conducted to determine the size of the gap S.

FIG. 7 shows a conventional swirling flow tube having no gap between the inner surface of the vertical tube and the swirl guide plate (inner diameter of the vertical tube:
The flow velocity in the inside in D) is measured at the radial position, the flow velocity at the center side is low, the flow velocity gradually increases toward the outside, and shows a maximum value at about 0.65 from the center. However, the flow velocity gradually decreases toward the inner surface of the vertical pipe.

When a gap S is provided between the inner surface of the vertical pipe 9 and the turning guide plate 10 as in the present invention, it is assumed that fluid leaks downward from the gap S, and the gap S is changed (S / D
= 0.00 to 0.15), the gap flow rate leaking from the gap S was measured. The result is shown in FIG.

At the time of the above flow rate test, it was visually confirmed that if the gap flow rate was about 10% or less of the total flow rate, the formation of the swirling flow had little effect.

For this reason, in FIG. 8, if the gap S is about 5% or less, which is the size of the gap when the gap flow rate / the total flow rate is approximately 10%, the gap S has an adverse effect on the formation of the swirling flow. Turned out to have no effect.

At this time, the inner surface of the vertical pipe 9 and the turning guide plate 10
The maximum value of the gap S was set to 5%, because the larger the gap S provided between them, the greater the effect of preventing clogging of dust.
Further, in order to smoothly insert and remove the turning guide plate 10 with respect to the vertical pipe 9, it is necessary to secure a gap S of about 1%, and the value of 1% is set to the minimum value. on the other hand,
In order to prevent the problem of dust clogging and at the same time reduce the influence of the gap S on the formation of the swirling flow, it has been found that the gap S of about 3% is most effective.

When the gap S is changed,
The size of the mesh of the grating material 27 is also changed according to the size of the gap S.

On the other hand, in the event that the swirling flow tube 7 becomes clogged with dust or the like, the grating member 27 is removed, the bolt 22 is removed, and the support frame 20 is released, and the bolt 19 is removed. By removing the support frame 20 from the central tube 16 and lifting the suspending piece 23 at the upper end of the central tube 16 by a crane 24 or the like as shown in FIG. The guide plate 10 is pulled out of the vertical pipe 9. Thereby, maintenance for removing dust and the like can be easily performed.

Further, as described above, since the swirl guide plate 10 integral with the center tube 16 can be inserted into and removed from the vertical tube 9, even when the swirl flow tube 7 is constructed, the vertical tube 9 can be inserted in advance.
After that, the swing guide plate 10 can be hung and installed in the vertical pipe 9. At this time, since the lower end of the center tube 16 is fitted to the fitting portion 18 of the lower fixed frame 17, the work of inserting the turning guide plate 10 can be easily performed.

The present invention is not limited to the above-described embodiment, but is not limited to the configuration of the inflow chamber and the like provided above the swirling flow tube. Concrete is in contact with the outer surface of the swirling flow tube. It can be applied to a self-supporting swirling flow pipe, and various methods can be adopted for the method of supporting the swirl guide plate and the center pipe inside the vertical pipe, and various changes can be made without departing from the gist of the present invention. Can of course be added.

[0046]

As described above, according to the swirling flow tube of the present invention, the following excellent effects can be obtained.

Since a gap of approximately 1 to 5% with respect to the inner diameter of the vertical pipe is formed between the inner surface of the vertical pipe and the turning guide plate, vinyl, wire, or the like is formed at the corner between the vertical pipe and the turning guide plate. This has the effect of preventing the problem of trash being caught.

Further, since it is possible to prevent deposits from adhering to the corners between the vertical pipe and the swirl guide plate, the trapped dust and sediment hinder the formation of the swirl flow in the swirl flow pipe, The function of the swirling flow tube such as reducing the swallowing amount of the fluid is not reduced, and the swirling flow tube can be prevented from being clogged with dust.

Further, when a meshing material having a mesh equal to or smaller than the gap is provided at the upper part of the swirling flow pipe, dust larger than the gap between the inner surface of the vertical pipe and the swirling guide plate is prevented from flowing into the swirling flow pipe. Thus, there is an effect that the problem of clogging of the swirling flow tube with dust can be more reliably prevented.

Also, in the unlikely event that the swirl flow tube becomes clogged with dust or the like, the swivel guide plate can be inserted into and removed from the vertical tube. This has the effect that maintenance for removing dust and the like can be easily performed.

When an air vent is provided at the lower part of the central pipe to form an air vent structure by the central pipe, the air entrained in the fluid flowing down while swirling in the swirling flow pipe is discharged to the upper part through the central pipe. Therefore, the air mixing rate in the fluid discharged to the connection pipe is reduced, and the amount of air guided to the storage chamber is reduced, so that the amount of liquid stored in the storage chamber can be increased.

[Brief description of the drawings]

FIG. 1 is a cut-away front view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged detailed view of the swirling flow tube of FIG. 1;

FIG. 3 is a partially enlarged plan view of the grating material of FIG. 1;

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 1;

FIG. 5 is a view in the direction of arrows VV in FIG. 1;

FIG. 6 is an operation diagram showing a state in which a turning guide plate is extracted from a vertical pipe.

FIG. 7 is a diagram showing a result of measuring a flow velocity of a fluid at a radial position in a swirling flow tube having no gap.

FIG. 8 is a diagram showing a change in gap flow rate when the size of the gap is changed.

FIG. 9 is a cut-away side view showing an example of a conventional swirling flow tube.

[Explanation of symbols]

 Reference Signs List 9 vertical pipe 10 turning guide plate 16 center pipe 17 fixing frame 20 support frame 23 hanging piece 25 air vent 26 air vent structure 27 grating material S gap

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2D063 BA20 3H025 BA25 BB02

Claims (4)

[Claims] 1. A swirling flow tube provided with a swirling guide plate inside a vertical tube for swirling a fluid flowing from an upper end and guiding the fluid to a lower portion, wherein the swirling guide plate can be inserted into and removed from the vertical tube. And a clearance between the vertical pipe and the swirl guide plate is provided between the vertical pipe and the swirl guide plate, which is about 1 to 5% of the inner diameter of the vertical pipe. 2. The swirling flow tube according to claim 1, further comprising a grating material having a mesh equal to or smaller than a gap between the vertical tube and the swirling guide plate, on an upper portion of the vertical tube. 3. The turning guide plate includes a center tube, a lower portion of the center tube is supported by a fixed frame provided on an inner lower portion of the vertical tube, and an upper portion of the center tube is supported by a support frame provided on an upper portion of the center tube. The swirling flow pipe according to claim 1 or 2, wherein the swirling flow pipe is supported on an upper part of the vertical pipe, and a suspension piece is provided at an upper end of the center pipe. 4. An air vent is provided at a lower portion of the center tube,
The swirling flow pipe according to claim 3, wherein the center pipe forms an air vent structure.