JP2003074092A - Removing method of enclosure in pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of efficiently discharging an enclosure by a small quantity of waste water. SOLUTION: Air is pressed in a main pipe 1 for flowing service water from a compressor C connected to an upstream side branch pipe 2 to reduce the water feeding cross-sectional area in the main pipe 1, and transfer force of the enclosure S is enhanced by increasing a flow speed according to this reduction, and the enclosure S is discharged from a downstream side branch pipe 3 together with the service water and the air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing impurities mixed in a pipe line through which a liquid such as water supply flows.

[0002]

2. Description of the Related Art For example, in a water pipe buried underground,
Contaminants such as earth and sand and rust may be mixed in, and these contaminants can be pushed out together with tap water by opening the fire hydrant connected to the branch pipe rising from the upper part of the main pipe of the water pipe or from near the bottom of the main pipe. It is removed by flowing it along with tap water through a sludge pipe laid up to the waterway.

[0003]

However, in the above method, when the drainage amount is limited depending on the situation of the drainage destination,
In some cases, the flow velocity in the pipe does not become so high that impurities cannot be sufficiently discharged.

Therefore, the present invention aims to provide a method capable of efficiently discharging impurities with a small amount of drainage.

[0005]

In order to solve the above-mentioned problems, the present invention reduces the cross-sectional area of a liquid flow path by increasing the flow velocity by injecting gas into a pipe through which liquid flows. It was decided to enhance the transfer power of the contaminants and to discharge the contaminants together with the liquid and air.

At this time, the pressure of the gas fed into the pipe is
If the control is performed according to the conditions inside the pipe and on the downstream side, the liquid discharged together with the contaminants will not overflow at the discharge destination.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

In this embodiment, as shown in FIG. 1, in a main pipe 1 of a water pipe buried in the ground, a branch pipe 2 of a fire hydrant located upstream thereof and a branch of a fire hydrant located downstream thereof. Use the tube 3 and.

These branch pipes 2 and 3 are connected to the fire hydrant box 4,
T-tubes with flanges, which are buried below 5, respectively
The main pipe 1 is branched by 7 and each branch pipe 2 and 3 is provided with a repair valve 8.

At the time of removing foreign matters, the compressor C is connected to the repair valve 8 on the upstream side through the air supply pipe 9, and the discharge pipe 10 is connected to the fire hydrant H on the downstream side.

Next, with each repair valve 8 open, the fire hydrant H on the downstream side is opened to start draining, and the compressor C is driven to pressurize air from the branch pipe 2 into the main pipe 1. The compressor C is provided with an air purifier to remove foreign matter in the atmosphere and send the air.

When the air is press-fitted into the main pipe 1 in this way, as shown in FIG. 2, the liquid surface of the tap water flowing through the main pipe 1 is pressed by the air to be lowered and the water passage cross-sectional area is reduced. So
The flow velocity in the pipe increases.

Therefore, the transfer force of the contaminants S is increased, and as shown in FIG. 1, the contaminants S are efficiently transferred to the downstream side, pass through the branch pipe 3 through the fire hydrant H on the downstream side, and are discharged. 1
After 0, it is discharged together with tap water and air.

At this time, if the pressure of the air sent into the main pipe 1 is controlled according to the conditions inside the pipe and on the downstream side, the tap water discharged together with the contaminants S may overflow in the water channel of the discharge destination. Absent.

This pressure control may be performed while checking the amount of air in the main pipe 1 with the endoscope 11 inserted from the branch pipe 2 into the main pipe 1. Also, instead of the endoscope 11,
A flow meter or the like may be used.

When the sluice valve 12 provided on the downstream side of the main pipe 1 is closed during the washing operation, the sluice valve 12 is closed.
The discharge efficiency of the contaminant S can be improved by blocking the flow of tap water and air to the downstream side.

Further, as the T-shaped pipe 7, the one in which the switching valve 13 is incorporated in the branch portion of the branch pipe 3 is used, and when the main pipe 1 is closed by the switching valve 13, the branch portion to the gate valve 12 are reached. Since the foreign matter S does not flow into the section of, the discharge efficiency of the foreign matter S is further improved.

By the way, it is desirable to fix the discharge pipe 10 with the fixing tool 14 because water and air may flow at the same time and violently pulsate. This fixture 14 is
It may be like a strut bar that is passed between the inner walls of 5.

As shown in FIG. 3, if the T-shaped pipe 7 is a spiral type having a communication passage 15 communicating with the branch pipe 3 from the bottom of the main pipe 1 to the outer circumference, Tube 1
Contaminants S can be efficiently sent from the bottom of the branch pipe 3 to the branch pipe 3.

When the waterway of a river or the like is close, instead of the branch pipe 3, as shown in FIG. 4, a T-shaped pipe 7 in which a sludge discharge pipe 16 branches from the bottom of the main pipe 1 is used. By using it, the contaminant S can be discharged more efficiently.

[0021]

As described above, in the method according to the present invention, the gas is forced into the pipe to increase the flow velocity of the liquid and enhance the transporting power of the contaminants. However, it is possible to efficiently discharge impurities with a small amount of drainage, and to prevent flooding in the drainage canal or the like.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a sectional view of the above water pipe.

FIG. 3 is a sectional view of a spiral wound T-shaped tube.

FIG. 4 is a cross-sectional view of a sludge pipe branching T-shaped pipe.

[Explanation of symbols]

1 main 2,3 branch pipe 4,5 fire hydrant 6,7 T-shaped tube 8 repair valve 9 Air pipe 10 discharge pipe 11 endoscope 12 gate valve 13 Switching valve 14 Fixture C compressor H fire hydrant S foreign matters

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Naoki Tomita             1-12-19 Kitahori, Nishi-ku, Osaka City Stock Association             Kurimoto Ironworks (72) Inventor Masazumi Konaka             1-12-19 Kitahori, Nishi-ku, Osaka City Stock Association             Kurimoto Ironworks F term (reference) 3B116 AA12 AB51 BB22 BB90                 3B201 AA12 AB51 BB22 BB90 BB92                       BB98

Claims (2)

[Claims] 1. A method for removing impurities in a pipe, which discharges impurities mixed in the pipe together with a flowing liquid, to reduce a cross-sectional area of a liquid flow path by pressurizing a gas into the pipe,
Along with this, a method for removing impurities in a pipe, which is characterized in that the flow velocity in the pipe is increased to enhance the transfer power of impurities. 2. The method for removing impurities in a pipe according to claim 1, wherein the pressure of the gas fed into the pipe is controlled according to the conditions inside the pipe and on the downstream side.