JPH0134797Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" This invention relates to piping structures in water supply equipment, etc., and is particularly applicable to piping structures at both ends of equipment that have flowmeters, electric valves, control valves, diaphragms of automatic control valves, etc. This invention relates to a piping structure for removing water (dead water) accumulated in bypass piping.

``Prior art'' Conventionally, as shown in FIG. 5, this type of piping structure has been used in which a bypass piping 3 is installed at a location of a main piping 1 where an electric valve 2, etc. is provided. However, if this bypass piping 3 is used as is for maintenance inspection or replacement work of the electric valve 2, etc., the water (dead water) containing rust etc. that has accumulated in the bypass piping 3 will flow into the main piping 1. This causes the water to turn red. Therefore, in order to prevent this red water from occurring, first close the downstream gate valve 4, close each gate valve 5, 6, and close the gate valve 7.
By opening the fire hydrant (or air valve, mud discharge pipe, etc.) 8 on the downstream side, water accumulated in the bypass pipe 3 was discharged and washed. However, when water is discharged in this manner, a problem arises in that water is cut off on the downstream side because the gate valve 4 is closed. Alternatively, there is a method of draining the water in the bypass piping 3 by using a drain pipe 9 installed in advance in the bypass piping 3, but in this case, the structure of the bypass piping 3 becomes complicated and construction is not easy. Moreover, there are problems in that the cost is high and it is difficult to drain all the water accumulated in the bypass pipe 3.

``Problems that the invention attempts to solve'' This invention aims to solve the problem of using bypass piping during maintenance, inspection, and replacement of flowmeters, electric valves, control valves, diaphragms, etc. in water equipment, etc. The issue is the occurrence of red water or water outages.

The present invention was developed in view of the above circumstances, and its purpose is to use water supply equipment, etc., to easily and completely drain water accumulated in bypass piping without causing a water outage downstream. The purpose is to provide piping structures.

"Means for solving the problem" The present invention provides a valve with a water inlet in the bypass piping, and has water inlets on the upstream and downstream sides of the valve with the water inlet. .

"Function" In the piping structure of the present invention, when draining water accumulated in the bypass piping and cleaning the pipe, each water inlet is opened individually while the valve with the water inlet is closed. be.

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

FIG. 1 is a schematic configuration diagram showing the overall configuration of the present invention, in which a valve 10 with a water inlet is provided in place of the gate valve 7 of the conventional example shown in FIG. 5, and a drain pipe 9 is provided.
It was designed so that it was not installed. Note that the other configurations are the same as those of the conventional example shown in FIG. 5, so the same reference numerals are given and the explanation will be omitted.

As shown in FIGS. 2 and 3, the valve 10 with a water port is composed of a valve main body 11 with a water port, a ball-type sub-valve 17, and a flange 18 with a water discharge port. This valve body 11 with a water inlet is provided through a valve box 12 in which a water channel 12a, a valve collection chamber 12b, etc. are formed, a valve cover 13 attached to the valve case 12, and a valve cover 13. a valve rod 14, a valve body 15 attached to the lower end of the valve rod 14;
It is mainly configured with a water pipe 16, which will be described later, which is integrally formed with the valve box 12.

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 seat 15a is attached to both sides of the valve body 15, and a valve seat 15a is attached to the valve body valve seat 15a, which is large enough to come in contact with the entire side circumference of the valve body valve seat 12e, and is guided to the center of the side circumferential surface of the valve body 15. Protrusions 15b are formed respectively, and the valve body 15 moves the guide protrusion 15b along the guide groove 12g formed in the inner wall of the valve chamber 12b by the vertical movement of the valve rod 14, and moves the valve body 15 into the valve 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. The water pipe 16 is connected to the ball type sub-valve 17 by connecting a flange 16d and a lower flange portion 17a. This ball-type sub-valve 17 opens and closes its flow path using a manual lever 17b, and the ball-type sub-valve 17 is connected to the water outlet flange 18 by connecting an upper flange portion 17c and a mounting flange portion 18a. ing.

This water outlet flange 18 includes the above-mentioned mounting flange portion 18a, a cap 18b, and a lid 18c, and is configured such that a hose (or flexible pipe) can be connected with a single touch by attaching the lid 18c. .

A state in which the valve 10 with a water inlet configured as described above is connected to the bypass piping 3 (see Fig. 1)
For example, when attempting to maintain, inspect, or replace the electric valve (or flowmeter, control valve, diaphragm of an automatic control valve, etc.) 2 connected to the main pipe 1, the following procedure is followed.

(1) First, while fluid is flowing through main pipe 1,
In addition, while the water inlet valve 10 is closed, rotate the manual lever 17b on the upstream side of the water inlet valve 10 to open the upstream ball type sub-valve 17.
open. Then, from main pipe 1 to bypass pipe 3
Fluid (water) enters the valve 10 through the water passage 12a on the upstream side of the valve 10 with a water passage, and the water pipe 16 on the upstream side, the ball type sub-valve 17, and the flange with a water outlet. 18 to the outside via a hose or the like. Therefore, the water (dead water) accumulated in the bypass piping 3 on the upstream side of the water inlet valve 10 is completely discharged to the outside.

(2) Next, close the ball-type sub-valve 17 on the upstream side, and open the ball-type sub-valve 17 on the downstream side by rotating the manual lever 17b on the downstream side of the valve 10 with water inlet. Then, the fluid enters the valve 10 from the main pipe 1 through the bypass pipe 3, through the water passage 12a on the downstream side of the water valve 10, and then passes through the water pipe 16 and the ball-type sub-valve 17 on the downstream side. ,
The water is discharged from the water outlet flange 18 to the outside through a hose or the like. Therefore, the valve 10 with a water inlet
The water accumulated in the bypass piping 3 on the downstream side is completely discharged to the outside. After the discharge work is completed, the ball type sub-valve 17 on the downstream side is closed.

(3) In this way, after the water accumulated in the bypass piping 3 is completely removed by the valve 10 with a water inlet, the valve 10 with a water inlet
At the same time, the gate valves 5 and 6 are closed, and the fluid that has been flowing on the electric valve 2 side is diverted to the bypass piping 3.
Let it flow through the sides. Then, maintenance, inspection, and replacement of the electric valve 2 and the like provided between the gate valves 5 and 6 may be performed.

(4) After the maintenance inspection and replacement work is completed, open the gate valves 5 and 6 and close the water inlet valve 10, reversing the operation in (3), to remove the fluid that has been flowing through the bypass piping 3 side. so that it flows through the electric valve 2 side.

Although the embodiment has been described using the ball-type sub-valve 17, any valve may be used as long as it can open and close the fluid flow path, and the ball-type sub-valve 17 and the water outlet may be used. A fire hydrant or the like may be used instead of the combination with the attached flange 18. Furthermore, although the valve body 11 with a water inlet has been described with a configuration in which the diameter of the partition chamber 12d is larger than the diameter of the water flow channel 12a, it goes without saying that it can also be applied to a so-called soft seal type valve in which both diameters are equal. . Furthermore, if a valve 10 with a water port is used instead of the gate valve 6 used in this embodiment, maintenance and inspection of the electric valve 2, etc. After the replacement work, the two parts of the electric valve (the first part of the main pipe between the gate valve 5 and the water inlet valve 10) can be easily vented, disinfected, and washed.

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

(1) Since the bypass piping is equipped with a valve with a water inlet, the fluid accumulated in the bypass piping can be easily removed without closing the main piping, and there will be no water outage.

(2) Since a water inlet is provided in the valve with a water inlet, the fluid accumulated in the bypass piping can be completely discharged. It never flows inside.

(3) Compared to the conventional method of discharging fluid in bypass piping using fire hydrants, etc. on the downstream side,
Since all operations can be performed within the valve chamber, workability is good, and a large amount of fresh water is not used to drain the fluid in the bypass piping, making it extremely economical.

(4) There is no need to install extra parts such as a T-shaped pipe in the bypass piping, the structure is simple, and turning is easy.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention, in which Figure 1 is a piping diagram showing the piping structure, Figure 2 is a front view with a part of the valve with a water inlet in cross section, and Figure 3 is a diagram showing the piping structure. The figure is a side view with a part of the valve in section.
The figure is a sectional view of a flange with a water outlet, and FIG. 5 is a piping diagram showing a conventional piping structure. 2...Electric valve, 3...Bypass piping, 10...
Valve with water inlet, 16e...Water inlet.

Claims (1)

[Scope of utility model registration request] In a piping structure in water supply equipment, etc., in which bypass piping is provided at both ends of a device having a flow meter, an electric valve, a control valve, a diaphragm of an automatic control valve, etc., the bypass piping is provided with a valve with a water inlet, A piping structure for water supply equipment, etc., characterized in that the valve with a water port is provided with at least one water port on each of the upstream side and the downstream side between the valve surfaces.