JPH0375798B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water distribution pipeline system for waterworks and the like.

[Conventional technology]

New water distribution pipe systems, such as water supply pipes, that are constructed due to urban planning or housing land development, etc., are designed to accommodate the expected future population increase in the area where they are constructed, as shown in Figure 8, for example. , branch pipes 2 and branch point water control valves 3 are installed in advance at locations in the water distribution main pipe 1 of the water distribution pipe system where branch points of pipes are predicted to be required in the future when the water distribution pipe system is laid. Or, as shown in Figure 9, the water distribution main 1 of the pipeline system should be pre-installed with a length of 500 m (l ₁ ) to 1000 m.
It is common practice to install multiple water control valves 4 at (l ₂ ) intervals, and when branching becomes necessary due to population growth, to add branch piping and branch point water control valves. Ta.

[Problems to be Solved by the Invention] For this reason, in the case of the water distribution pipe system shown in Figure 8, the construction cost required at the time of initial laying of the water distribution pipe system increases, and the branch point system installed at the time of initial laying increases. water valve 3
If the valve is left unused for a long period of time, its function as a water control valve deteriorates, and branch connection work such as water supply pipes, etc.
Issues such as valve opening/closing problems or seal failures occur when performing repair work for bursting accidents, water leaks, etc., or when water is cut off for maintenance and management purposes.
Furthermore, if there were any changes in city planning, there was a risk that a portion of the pipeline system that had been constructed in advance due to the installation of expensive valve devices would be wasted.

In addition, in the case of the water distribution pipeline system shown in Figure 9, the construction cost required at the time of laying is low, but because the intervals between the water control valves are wide, the water cut-off area when carrying out various construction works is wide-ranging. Drainage work and cleaning and drainage work in the water control valve operating pipes take a long time and a large amount of water is wasted, and when branch pipes are added,
The area around the buried water distribution main 1 was excavated again, a branch water control valve and a valve chamber to house the branch water control valve were installed, and the branch pipes were connected, making the construction work large-scale and requiring excavation work. In addition to increasing the total cost due to double labor, water outage time becomes longer and traffic control for construction work is also required for a long time. Issues such as being restricted to a limited time slot arose.

The present invention has solved these problems, and the construction cost is low, the water cutoff time for various construction works is short, and the water cutoff can be carried out in a narrow area.Furthermore, it can easily cope with future population growth, and can be used for urban planning. The purpose is to provide a water distribution pipeline system that can effectively cope with changes.

[Means to solve the problem]

In a water distribution pipeline system such as a water supply system in which a plurality of water control valves are installed, the present invention provides an appropriate number of water control valves that are provided with openings that can be sealed by lids in the pipelines between the water control valves of the water distribution pipeline system. This irregularly shaped tube has a storage part that stores equipment such as a valve or strainer that is inserted through an insertion port that is liquid-tightly closed by a lid, and a storage part that is provided on both sides of the storage part and which stores the above-mentioned equipment. A connecting portion for connecting to a water pipe.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

Figure 1 shows the water distribution pipeline system at the time of initial installation.The distribution pipeline system includes important underground pipes that require water control valves, pipes before and after bridges and track crossing points, and muddy pipes. In addition to the connections between water distribution pipes of different systems, there are connections between 500 m (l ₁ ) and
Water control valves 11 are installed at intervals of 1000 m (l ₂ ). In the position where it is necessary to install a branch pipe in the future between the water control valves 11 and 11, a deformed pipe 1 for the branch point is installed.
2a in advance, and a deformed pipe 1 for a branch point.
When the distance from the installation position of water control valve 2a to water control valve 11 is long, irregularly shaped pipes 12b for water control valves are appropriately interposed near the upstream and downstream sides of irregularly shaped pipe 12a.

When water is cut off for construction work such as adding branch piping or repairing water leaks, use the irregularly shaped pipe 12a or irregularly shaped pipe 12 closest to the upstream side of the construction site.
A gate valve or the like (not shown) is installed in the pipe b to shut off the pipe line, thereby minimizing the water cutoff area.

In addition, when branch piping becomes necessary due to an increase in population, etc., as shown in Fig. 2, the irregularly shaped pipe 12a
In addition to adding a branch pipe 13 to the branch pipe 13, water control valves 14, 14 are installed on the downstream side of the branch pipe 13, and a detachable water control valve 15 is attached to the irregularly shaped pipe 12b. Develop into a water pipe shape.

Furthermore, if the branch point of the branch pipe is changed due to changes in city planning, etc., the irregularly shaped pipe for the water control valve 1
2b is diverted to the branch point, and the irregularly shaped pipe 12 is diverted to the branch point.
The configuration is such that this can be handled by reusing a as a water control valve.

FIGS. 3 and 4 show an embodiment of a multi-purpose irregularly shaped pipe 12 used as an irregularly shaped pipe 12a for a water control valve and an irregularly shaped pipe 12b for a branch point in the water distribution pipeline system of this embodiment. be.

The irregularly shaped pipe 12 is provided with a storage section 16 inside which stores devices such as a gate valve, a butterfly valve, a strainer, etc. at right angles to the water distribution pipe. Storage section 16
The bottom portion 16a has a semicircular arc groove shape with a diameter slightly larger than the inner diameter of the water distribution main pipe 10, and the side groove portions 16b, 16 extend tangentially upward from both ends of the bottom portion 16a.
The bottom portion 16a has a U-shaped cross section consisting of
A tapered continuous groove is formed in which the groove width is narrower on the side and wider on the opening 16c side at the upper end of the side groove portions 16b, 16b. At approximately the center of both sides of this continuous groove, a flow hole 16d having a diameter slightly smaller than the inner diameter of the water distribution main pipe 10,
16d is open, and the flanges 10a, 10 of the water distribution main pipe 10 are attached to the tips of both the flow holes 16d, 16d.
Cylindrical connecting pipes 16f, 16f are provided with flange portions 16e, 16e, which are connected to the pipe a by bolts (not shown), respectively. Annular rubber sealing members 17, 17 are attached to the opening edges of both the communication holes 16d, 16d, respectively.

The opening 16c of the storage portion 16 is liquid-tightly closed by fixing the lid 18 with a bolt (not shown). The lid body 18 has an air vent hole 18a that is closed with a bolt plug 19. Eye bolts 20, 20 for hooking lifting wires during transportation or installation of the irregularly shaped tube 12 are provided on the upper surfaces of both wings of the lid body 18, using bolt holes for fixing the lid body.

The inner surfaces of each of the storage section 16, the connecting pipe section 16f, and the lid body 18 are entirely coated with a rust-preventing film 21 formed by powder coating. Note that 22, 22 are legs for stabilizing the irregularly shaped pipe 12 when it is installed at the bottom of the valve chamber.

Next, work on the water distribution pipeline system configured as described above will be explained.

Water distribution main pipe 10 of the laid water distribution pipeline system shown in Figure 1
In the event of water leakage, install a removable gate valve or the like in the storage part 16 of the irregularly shaped pipe 12 located closest to the upstream side of the water leakage point to shut off the flow within the water distribution pipe. By cutting off the water supply, the water outage area will be kept to a minimum extent and repair work will be carried out at the leakage point.

An example of a removable gate valve used for this flow cut-off will be explained based on FIGS. 5 and 6. The gate valve 23 inserted from the opening 16c of the storage portion 16
These include a valve body part 23a that is fitted into a tapered continuous groove formed in the storage part 16 of the irregularly shaped pipe 12, and a fixing part 23b that extends from the top of the valve body part 23a and is bolted to the lower surface of the lid body 18. and the valve body part 2
3a is thicker on the upper side of the fixing part 23b,
It has a disk shape with a thinner bottom. The valve body part 23a and the shielding part 23c reinforced with a lattice-shaped rib that presses the peripheral edge against the sealing material 17 of the storage part 16 to close the flow hole 16d liquid-tightly are placed on the upstream side (Fig. 6) when inserted. A hollow portion 23d is formed on the side that is the right side in FIG.

After fitting the gate valve 23 into the storage part 16 through the opening 16c at the top of the irregularly shaped pipe 12, the opening 16c is liquid-tightly closed with the lid 18, and the lid 18 is fixed from the top with bolts. Then, the gate valve 23 is attached to the irregularly shaped pipe 12 to cut off the water, and
To end the water cutoff, water flow is restarted by removing the gate valve 23 from the irregularly shaped pipe 12.

In addition, when adding branch pipes 13 to the water distribution main pipe 10 in the form of a water distribution pipe due to the population increase in Figure 2,
Deformed pipe 12a and deformed pipe 12 interposed at the branch point
Deformed tube 12 shown in FIGS. 3 and 4 as b
, remove the lid 18 of the irregularly shaped pipe 12a that will be the branching point, attach the branch pipe connecting lid (not shown) that forms the branch pipe connecting part in its place, and then close the connecting part of the branch pipe connecting lid. The branch pipe 13 is connected, and a water control valve 14 is interposed on the downstream side of the branch pipe 13 near the branch point.

Deformed pipe 12b for branch point water control valve of water distribution main 10
is provided with a detachable water control valve 15. An example of this detachable water control valve will be explained based on FIG. A master valve box 27 in which a master valve body 26 with a slave valve box 25 removably attached to the center thereof can be opened and closed.
A cylindrical pipe whose lower end is fixed to the upper part of the master valve body 26 and whose upper end is attached to the valve operating part 28 liquid-tightly penetrates the externally provided valve operating part 28 and the dedicated lid body 29. The parent valve actuating valve rod 30 is inserted into the hollow portion of the parent valve actuating valve rod 30, and the lower end is inserted into the child valve body 24.
The child valve element drive shaft 31 is detachably connected to the end of the valve stem 24a and has its upper end engaged with the valve operating section 28.

The master valve box 27 has a wedge-shaped annular body that is thicker on the upper side and thinner on the lower side. A deceleration mechanism (not shown) is used to open the main valve body 26, which is fitted to the cap part 28a for driving the master valve body, and to drive the slave valve body 24 by the cap part 28b for driving the slave valve body. Each valve is configured to be operated independently. Note that 32 is a valve chamber unit that surrounds the valve operating portion 28 to form a valve chamber.

In addition, the irregularly shaped pipe 12b to which the water control valve 15 of the parent-child butterfly valve type configured as described above is attached,
An insertion part 32 into which a lower valve stem bearing part protruding from the lower part of the main valve box 27 is inserted is added to the inner bottom of the storage part 16 of the irregularly shaped pipe 12 shown in FIGS. 3 and 4.

〔Effect of the invention〕

As explained above, the water distribution pipeline system according to the present invention,
An appropriate number of irregularly shaped pipes with openings that can be sealed with lids are interposed between water control valves in water supply pipeline systems such as waterworks where multiple water control valves are installed, and these irregularly shaped pipes are fitted with lids. a storage section that stores equipment such as a valve or strainer that is inserted through an insertion port that is fluid-tightly closed by the body;
Since the storage part is equipped with connection parts that connect to the water distribution pipes on both sides, and the number of expensive water control valves used is reduced, the construction cost required when laying the water distribution pipe system is reduced, and the future In addition, when carrying out various construction work on the water distribution pipeline system, it is possible to create a water distribution pipeline system that can appropriately cope with the population increase of By doing so, the water cutoff area can be minimized. In addition, repair work or branch pipe expansion work can be completed in a short time, and water outage time can also be shortened, which has the effect of reducing restrictions on work hours.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the water distribution pipeline system according to the present invention; Figure 1 is a pipeline diagram showing the main parts of the water distribution pipeline system at the time of initial installation; 1 is a pipe diagram showing a state in which a branch pipe is added to the water distribution pipe system in Fig. 1, and Figs. 3 and 4 show an example of irregularly shaped pipes installed in the water distribution pipe system. 3 is a front view of the judgment surface, FIG. 4 is a cross-sectional view of FIG. 3, and FIGS. The figure is a half-sectional front view when the gate valve is installed, Figure 6 is a - sectional view of Figure 5, Figure 7 is a half-sectional front view when the parent-child butterfly valve type water control valve is installed, and Figure 8 is a half-sectional front view when the gate valve is installed. and FIG. 9 are pipe diagrams each showing a conventional water distribution pipe system. 10...Water main, 11...Water control valve, 12,1
2a, 12b... Irregular pipe, 13... Branch pipe, 14
...Water control valve, 15...Releasable water control valve, 16...
Storage part, 16c...opening part, 16d of irregularly shaped pipe 12
...Flow hole, 17...Sealing material, 18...Lid body,
21...Anti-rust film, 23...Releasable gate valve, 2
4... Child valve body, 25... Child valve box, 26... Main valve body, 27... Main valve box, 28... Valve operating section, 29...
... Lid body, 30 ... Valve rod for operating the master valve body, 31 ... Child valve body drive shaft.

Claims (1)

[Claims] 1. In a water distribution pipeline system such as a water supply system in which a plurality of water control valves are installed, an appropriate number of odd-shaped pipes equipped with openings that can be sealed with lids are installed in the pipeline between the water control valves in the water distribution pipeline system. This irregularly shaped pipe has a storage part that stores equipment such as a valve or strainer that is inserted through an insertion port that is liquid-tightly closed by a lid, and a storage part that is provided on both sides of the storage part and connects to the water distribution pipe. A water distribution pipe system characterized by comprising a connecting part to be connected.