JPH0256550B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method of replacing piping, etc. of water supply equipment, and particularly relates to a method of replacing piping, etc., which can be replaced without water outage.

``Prior art'' In general, in water supply equipment, when the underground pipes become obsolete or the cross-sectional area of the pipes becomes small due to rust, etc., it is necessary to replace the pipes with new pipes. be. and,
Conventionally, when replacing piping, gate valves on the upstream and downstream sides of the piping are closed and the piping is replaced with a new one.

"Problems to be Solved by the Invention" However, when replacing the piping as described above, there is a problem in that water is cut off downstream of the location being replaced during the replacement work.

The present invention has been made in view of the above circumstances, and its purpose is to provide water supply equipment that can prevent water outage on the downstream side of the pipe during pipe replacement work and that can provide normal water supply. Concerning how to replace piping, etc.

"Means for Solving the Problem" The present invention provides at least two or more valves with water inlets, each having a water inlet on the upstream side and the downstream side between the valve faces, installed in advance at appropriate positions in the main piping. After that, when replacing piping, etc., replace the water port on the upstream side of the first valve with water port and the downstream side of the second valve with water port installed downstream of this first valve with water port. The fluid flowing in the main pipe is guided from the first valve with a water port to the temporary pipe, and the fluid flowing in the main pipe is connected to the water port via a temporary pipe, and the fluid flowing in the main pipe is guided through the second valve with a water port to the main pipe on the downstream side. It is designed to flow into pipes.

"Embodiment" Hereinafter, one embodiment of the present invention shown in FIGS. 1 to 4 will be specifically described.

First, as shown in Figure 1, there are three main pipes MP ₁ ,
When burying MP ₂ and MP ₃ , main piping MP ₁ and MP ₂
A first valve B ₁ with a water inlet is disposed between the main pipes MP ₂ and MP 3, and a second valve B ₂ with a water inlet is disposed between the main pipes MP 2 and MP ₃ .

Here, the valves B ₁ and B ₂ with a water outlet include a valve body 1 with a water outlet, a ball type sub-valve 2, and a flange 3 with a water outlet, as shown in FIGS. 2 and 3, respectively.
It consists of a valve BA with a single water port. This valve body 1 with a water passage port has a water passage 12a.
and a valve box 12 in which a valve collection chamber 12b and the like are formed.
, the valve cover 13 attached to the valve box 12 , and the valve cover 13
a valve rod 14 provided through the valve body 1, a valve body 15 attached to the lower end of the valve rod 14, and a valve body 1
2 and a water pipe 16, which will be described later, are formed integrally with each other.

The center portion of the water passage 12a is formed into a partition chamber 12d having a larger diameter than the water passage 12a, and a valve collection chamber 12b is formed upward through the partition chamber 12d. And the partition chamber 1 of the water passage 12a
A ring-shaped valve box valve seat 12 is provided at each opening on the 2d side.
e is fitted, and a connecting flange 12f is formed at the upper end of the valve box at the upper end of the valve receiving chamber 12b. Furthermore, a connecting flange 13 is also provided at the lower end of the valve lid 13.
a is formed, and the valve lid 13 is connected to this connecting flange 13.
a to the connecting flange 12f of the valve box 12 and joined to the valve box 12, and the valve cover 1
A valve collection chamber 13b is formed inside the valve housing 3, and this valve collection chamber 13b communicates with the valve collection chamber 12b of the valve box 12. Furthermore, a valve rod 14 provided through the valve cover 13 is movable up and down along the valve cover 13. A valve body 15 is provided at the lower end of this valve rod 14.
A valve body valve seat 15a is attached to both sides of the valve body 15, and a valve body valve seat 15a of a size that can contact the entire side circumference of the valve box valve seat 12e is attached, and a valve body valve seat 15a is attached to the center of the side circumferential surface of the valve body 15. Guide protrusions 15b are formed respectively, and the valve body 15 moves the valve rod 14 up and down to guide the guide protrusions 15b along the guide grooves 12g formed on the inner wall of the valve collection chamber 12b, while moving the valve body 15 into the valve collection chamber 1.
It is designed to move up and down within 2b and 13b.
Then, when the valve body 15 is lowered to bring the valve body valve seat 15a into close contact with the valve body valve seat 12e, the water passage 12a is blocked. On the other hand, the valve box 12
Pipe connection flanges 12h are formed at both ends of the water passage 12a facing outward.

The upper part of the valve box 12 between the inside of the flange 12h of the valve box 12 and the outer body (outer circumferential wall of the valve box 12) 12i is located above the water passage 12a and is connected to the valve box valve. Water outlet 1 is located near the seat 15a.
A water pipe 16 that opens at 6e is provided in a protruding manner. This water pipe 16 has a lower part 16a that is connected to the water passage 1.
2a and the flange 12h, facing upward, and the central portion 16b of the valve collection chamber 12
The outer shell 12 is integrally connected to the outer shell 12i on the outside of b.
It extends obliquely upward away from i, and its upper part 16c is formed to face upward, and this upper part 16c
A flange (fastening means) 16d is formed at the periphery of the opening. One of the water pipes 16 (on the left side in FIG. 3) is connected to the ball type sub-valve 2 by connecting the flange 16d and the lower flange portion 4. This ball-type sub-valve 2 opens and closes its flow path using a manual lever 5, and the ball-type sub-valve 2 is connected to the water outlet flange 3 by connecting an upper flange portion 6 and a mounting flange portion 7. ing.

This flange 3 with a water outlet includes the above-mentioned mounting flange portion 7, a cap 8, and a lid 9, and is configured such that the lid 9 can be removed and a temporary pipe (flexible pipe) 10 can be connected with one touch. It is. Further, the other water pipe 16 (on the right side in FIG. 3) is connected to the above-mentioned single water port valve BA by combining a flange 16d and a pipe connecting flange 12h.

This valve BA with a single water port basically has the same structure as the valve body 1 with a water port, except that the water pipe 16 is provided only on one side (the upper side in Fig. 3). It is a point. The other configurations are the same as the valve body 1 with a water inlet, so a description thereof will be omitted. A closing plate 11 is attached to the flange 16d of the water pipe 16 of the single water port valve BA. Further, the upper pipe connection flange 12h of the single water port valve BA and the mounting flange portion 7 of the water discharge port flange 3 are coupled.

Valve B ₁ with water inlet configured as above,
B ₂ is connected between the main piping MP ₁ , MP ₂ , MP ₃ respectively, and with each ball type sub valve 2 and single water port valve BA closed, each main piping MP ₁ ,
Fluid is made to flow through MP ₂ and MP ₃ . If the main piping MP ₂ becomes obsolete or the cross-sectional area of the pipe becomes small due to rust, etc., and it becomes necessary to replace the main piping MP ₂ , or if the flow meter installed in the main piping MP ₂ When it becomes necessary to perform maintenance inspection or replacement work on the diaphragm of a valve, control valve, automatic control valve, etc., first install a valve with a water inlet.
At the same time, remove the lid 9 of the flange 3 with a water outlet on the upstream side of the valve B ₁ and connect one end of the temporary piping 10, and also remove the lid 9 of the flange 3 with a water outlet on the downstream side of the valve B ₂ with a water outlet to temporarily construct the pipe. Connect the other end of the pipe 10. In addition, the blocking plate 11 that blocks the water pipe 16 of the single water port BA of the water port valve B ₂ is removed, and the on-off valve such as a ball type sub-valve and the hose connected to this on-off valve are removed. It is connected to the water pipe 16. Next, the ball-type sub-valve 2 connected to the water pipe 16 on the upstream side of the valve B ₁ with a water port is opened, and the on-off valve is opened, and the main pipe MP ₁ is connected to the temporary pipe 10.
Supply fluid (water) to. Then, this fluid becomes
The fluid is discharged to the outside through the temporary pipe 10, the single water port valve BA of the water port valve _B2 , the water pipe 16, and the on-off valve, so that the temporary pipe 10 is filled with fluid. Air venting and cleaning of the temporary piping 10 are completed. Next, close the above-mentioned on-off valve, open the single water port valve BA on the downstream side of the water port valve B ₂ , and close the water port valve BA.
When the valve body 1 with each water inlet of B ₁ and B ₂ is closed,
The main pipe MP ₂ is shut off, and the fluid from the main pipe MP ₁ flows to the main pipe MP ₃ via the valve B ₁ with a water port, the temporary pipe 10, and the valve B ₂ with a water port. Therefore,
In this state, replace the main piping MP ₂ or replace the main piping.
If maintenance, inspection and replacement work is carried out on the electric valves etc. installed in MP ₂ , the fluid will not be cut off and will not leak. Furthermore, after the above work is completed, fluid or chlorine is injected between the flange 3 with a water outlet on the downstream side of the valve with a water outlet B ₁ and the flange 3 with a water outlet on the upstream side of the valve with a water outlet B ₂ , Disinfect and fill the newly installed main pipe MP ₂ with fluid. Next, when the ball-type sub-valve ₂ and the single-water port valve BA of the water port-equipped valves B ₁ and B ₂ are closed, and the water port-equipped valve body 1 of each water port-equipped valve B 1 and B ₂ is opened, The fluid is in a normal state flowing from the main pipe MP ₁ through the main pipe MP ₂ to the main pipe MP ₃ . Then, the temporary piping 10 that has finished its role is removed.

In addition, even if the main pipe MP ₂ is destroyed due to an unpredictable situation, it can be replaced with a new main pipe using the method described above, and the water cut-off state can be restored to its original state in a short time. Furthermore, in this embodiment, the ball-type sub-valve 2 is used on the upstream side of the valves B ₁ and B ₂ with water ports, but any valve can be used as long as it can open and close the flow path. Furthermore, a fire hydrant or the like may be used instead of the combination of the ball type sub-valve 2 and the flange 3 with a water outlet. Furthermore, the main piping
If it is only for replacing MP ₂ , a general valve may be used instead of the single water port valve BA of the water port valve _B1 . Furthermore, the valve body 1 with a water port and the valve BA with a single water port have a water flow channel 12a.
Although the explanation has been made with a configuration in which the diameter of the partition chamber 12d is larger than the diameter of the partition chamber 12d, it goes without saying that the present invention can also be applied to a so-called soft seal type valve in which both diameters are equal.

"Effects of the Invention" In summary, according to the present invention, the following excellent effects are achieved.

(1) By installing a valve with a water inlet at an appropriate position on the main piping, it is possible to replace the piping or perform maintenance, inspection, and replacement of electric valves, etc. using temporary piping without water outage.

(2) In the event that piping is damaged, a bypass circuit can be formed using temporary piping, so the water outage time can be extremely shortened and normal conditions can be restored in a short period of time.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a piping diagram, Figure 2 being a partially sectional front view of a valve with a water inlet, and Figure 3 being the same valve. FIG. 4 is a sectional view of the flange with a water discharge port. MP ₁ , MP ₂ , MP ₃ ... Main piping, B ₁ , B ₂ ... Valve with water inlet, 10... Temporary piping, 16e... Water inlet.

Claims (1)

[Claims] 1. After installing at least two or more valves with water inlets each having a water inlet on the upstream and downstream sides between the valve faces at appropriate positions on the main piping, when replacing the piping, etc., the above water inlet An upstream water inlet provided in a first water inlet valve among the water inlet valves, and a downstream water inlet in a second water inlet valve provided downstream of the first water inlet valve. are connected by a temporary pipe, and the fluid flowing in the main pipe on the upstream side of the first valve with a water port is guided from the first valve with a water port to the temporary pipe, and the second valve is connected with the temporary pipe. A method for replacing piping, etc. of water supply equipment, characterized in that the water flows to the main piping on the downstream side through a valve with a water inlet.