JPH01198931A - Cleaning method for pipeline - Google Patents

Abstract

PURPOSE:To make a cross laying pipe at each floor washable in leaving a wet scrubber set up in the specified floor intact by feeding compressed air and head water pressure into the cross laying pipe by way of a vertical main pipe in a state of having one end of the cross laying pipe released. CONSTITUTION:In a building, there are provided with a vertical main pipe 2 set up over each floor and a cross laying pipe 3 connected to this main pipe and set up at each floor. When the cross laying pipe 3 at an upper floor 8 is washed, compressed air 9 driven intermittently from a compressed air driver 1 set up in a lowermost floor 7 goes up in the vertical main pipe 2 where water is filled up and flows into the cross laying pipe 3 at the upper floor 8 in the state that a terminal faucet 5 additionally installed in the pipe 3 is opened. In succession, head water pressure 10 imposed on the inside of the cross laying pipe 3 flows into the cross laying pipe 3. With this constitution, the cross laying pipe at the upper floor is easily washable in leaving a web scrubber set up in the lowermost floor intact.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a method for cleaning pipes installed in buildings using an air impact method to remove slime-like rust that is a cause of red water adhering to the inside of the pipes. Regarding construction methods.

(Prior art) Conventional pipe cleaning methods include: 1) As described in JP-A-58-156386, the inside of the pipe is sealed with water and one end of a faucet, etc. attached to a horizontal pipe is used. A method of cleaning the inside of horizontal pipes by injecting compressed air from the pipe and then opening the water faucet at the end.

2) JP-A-49-116868, JP-A-53-7
As described in Japanese Patent Publication No. 2379 and Japanese Patent Application Laid-Open No. 60-67896, a construction method in which compressed air is injected into the piping while water is being supplied thereto, and the inside of the horizontal pipe is then cleaned by opening the faucet at the end.

However, in the former construction method, a compressed air driving device must be attached to the horizontal pipes to be cleaned installed on each floor. That is, it is necessary to perform cleaning work while moving from floor to floor. In addition, even if compressed air is injected from one end of the hydrant of the side-drawn pipe without opening the end hydrant before cleaning, i.e., while the water is still sealed, the generated ultrasonic waves etc. will be attenuated within the long side-drawn pipe. This is insufficient to remove the slime-like rust that adheres to the inside of the pipe.

In the latter construction method, as with the former, it is necessary to perform cleaning work on each floor separately, and at the same time, it is necessary to separately install a water pump device, etc. When increasing the water supply speed to increase cleaning power, the diameter of the end faucet is usually 13A or 2.
Since the pressure is limited to 0A, the pressure inside the pipe increases, and when compressed air is injected here, the flow rate of the cleaning fluid decreases, and the water supply and compressed air are separated, resulting in a two-phase flow between the top and bottom, resulting in a decrease in cleaning power. There's a problem.

An object of the present invention is to provide a pipe cleaning method that can clean the inside of horizontal pipes attached to a plurality of floors without moving a cleaning device to each floor.

(Means for solving femoral head ☆) The feature of the present invention is to solve the problems of the conventional construction method. One end of the horizontal pipe is opened, and compressed air is injected from the lower part of the vertical main pipe in that state. By injecting the compressed air and the head pressure water applied to the horizontal drawing pipe into the horizontal drawing pipe, the inside of the pipe is cleaned.

(Operation) Open the end hydrant attached to the horizontal pipe on the upper floor, and in that state compressed air is injected intermittently.

The injected compressed air rises as an air mass inside the water-filled vertical pipe, reaches the upper floor, and then flows into the horizontal pipe. Subsequently, the water head pressure applied to the horizontal drawing pipe flows into the pipe. That is, the air mass and water head sequentially become a high-speed fluid that flows into the horizontal draw pipe, washes away slime-like rust, etc., and then jets out from the opened end faucet.

As mentioned above, the cleaning air mass and head water pressure are sent to the horizontal pipes on each floor via the vertical main pipe, so the compressed air injection device can be installed on the lowest floor, and the nearest The lowest hydrant can be used as the standard driving point. This makes it possible to clean the inside of the horizontal pipe on each floor without moving the cleaning device to each floor.

(Example) Embodiments of the present invention will be described below based on the drawings.

The building has an elevated water tank 6, and flood piping is installed consisting of a vertical main pipe 2 arranged across each floor, and horizontal pipes 3 connected to the vertical main pipe 2 and arranged on each floor. . The horizontal pipes 3 on each floor are each equipped with a plurality of water taps 5.

A compressed air injection device (cleaning device) 1 is installed on the lowest floor and connected to a water tap 4 closest to the vertical main pipe 2 in the horizontal pipe 3 on the lowest floor.

Next, the operation will be explained. When cleaning the horizontal pipe 3 on the upper floor 8, the water tap 5 at the end attached to this pipe is opened, and compressed air 9 is intermittently injected in this state. The injected compressed air 9 rises in the vertical main pipe 2 filled with water as an air mass, reaches the position of the horizontal draw pipe 3 on the upper floor 8, and further flows into the horizontal draw pipe 3. . Subsequently, the water head pressure water 10 having a head height h applied to the horizontal draw pipe 3 from the elevated water tank 6 flows down and flows into the horizontal draw pipe 3. That is, the compressed air 9 that has become an air mass and the head pressure water 16 sequentially become high-speed flowing water and flow into the horizontal drawing pipe 3, cleaning the slime-like rust etc. that has adhered to the inside of the pipe, and discharging the water at the opened end. Washing waste water 11 is spouted from the plug 5.

When there are a plurality of water faucets 5 attached to the horizontal draw pipe 3, the cleaning power is improved by opening only one location and not opening two locations at the same time. In addition, the water head height h within the horizontal drawing pipe 3
If the head water pressure is 0.7Kg f/c- or more, the compressed air 9 which has become an air mass and the head water pressure 10 will sequentially become a high-speed fluid and flow into the horizontal drawing pipe 3, increasing the cleaning power. Out.

When cleaning the horizontal pipes 3 on other floors, close the water taps 5 on the other floors and clean the horizontal pipes 3 on the floor to be cleaned.
Open the water tap and clean it in the same way.

The above embodiment has the following effects.

1) Since the compressed air injection device was installed on the lowest floor, that is, the lowest water tap closest to the vertical main pipe was used as the standard injection point, there was no need to set the amount of compressed air injection for each floor, and each floor Cleaning work can be carried out without moving from floor to floor.

2) Open the end hydrant attached to the horizontal pipe on the upper floor, then inject compressed air from the lowest hydrant closest to the vertical main pipe, and remove this compressed air and the water head pressure applied to the horizontal pipe. Since the water was used to flow into the horizontal pipe, the water pump device
There is no need to install a separate pipe, and the slime-like rust adhering to the inside of the pipe can be cleaned using high-speed fluid created by the falling and inflowing of compressed air and head pressure water, improving work efficiency and cleaning. Effective use of water, simplification of cleaning equipment, etc. can be achieved.

(Effects of the Invention) As described above, according to the present invention, the air mass and head pressure water for cleaning are sent into the horizontal pipes of each floor via the vertical main pipe, so the cleaning device can be installed on a specific floor. This has the effect of making it possible to easily clean the horizontal pipes on the particular floor and the floors above it without having to move the cleaning device from floor to floor while it is installed on the floor.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an embodiment of the present invention. Explanation of symbols 1...Compressed air driving device 2...Vertical main pipe 3...
Horizontal pipe on the upper floor 4... Hydrant at the bottom 5.5.
... Water tap on the upper floor 6 ... Elevated water tank 7 ... Bottom floor 8 ... Upper floor 9 ... Compressed air
10...Hydraulic head pressure water 11...Washing wastewater
h...Height of water head -1]

Claims (1)

[Claims] 1. By filling water and injecting compressed air into the piping, which consists of a vertical main pipe installed in a building and multiple systems of horizontal pipes connected to this vertical main pipe at different positions in the height direction. In the pipe cleaning method for cleaning the inside of the horizontal pipe,
By opening one end of the horizontal drawing pipe to be cleaned among the horizontal drawing pipes of the plurality of systems and injecting compressed air from the lower part of the vertical main pipe in that state, the water head pressure applied to the compressed air and the inside of the horizontal drawing pipe is reduced. A pipe cleaning method characterized by flowing water into the horizontal pipe.