JPS5825919B2 - Water-free piping construction method for fragile pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a fluid transport pipe, particularly a fragile pipe such as an asbestos cement pipe, in which fluid control valves or branch pipes are installed at required locations in the pipe without interrupting the flow in the pipe. This relates to a construction method, and its purpose is to provide a pipe construction method that has a simple structure, is easy to construct, and has uninterrupted water supply, allowing piping to be carried out with live water inside the pipe without damaging the fragile pipe. It is.

One embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a fluid transport pipe, and this fluid transport pipe 1 connects a plurality of main pipes 1□, 1□, and 13 in series, and their connection points is mechanically and watertightly fixed by a joint 2122.

3 is an excavation trench made by excavating a part of the earth and sand where the fluid transport pipe 1 is buried, and this excavation trench 3 is connected to the main pipe 12 and the main pipe 1. The main pipe 13 and the joints 21 and 2□ that connect these, respectively, are exposed, and a concrete foundation 4 is provided at the bottom of the excavated trench 3.

5A is one auxiliary pipe, and this auxiliary pipe 5A is divided in the tube axis direction, and has an auxiliary split pipe 5A1 having a required length to cover most of the joint 2□ and the end of the main pipe 1□. 5A2, the abutment surfaces of the split pipes 5A1 and 5A2 are fixed watertightly by another method using a welding tool, and the open end located at the joint 2□ is fixed watertightly by a rubber packing 6 and a press ring 7. .

5B is the other auxiliary pipe, and this auxiliary pipe 5B is the auxiliary split pipe 5.
B1 and 5B2, and has the same structure as described above, and is watertightly fixed to the majority of the joint 220 and the end of the main pipe 1□ by a rubber packing 6 and a press ring T.

The auxiliary pipe 5 fixed to both ends of the main pipe 1□0 in this way
A and 5B are injected with a filler 9 such as concrete milk pitch or epoxy resin, which solidifies over time, through the injection port 8 provided at the top of each pipe, and into the outer wall of the main pipe 1□ and the inside of the auxiliary pipe 5. The resulting space is filled, and the space is solidified to form an integral structure.

Reference numeral 10 denotes a case body that is mounted across the corresponding ends of auxiliary tubes 5A and 5B that are integrally fixed to both ends of the main tube 1□0, respectively.This case body 10 has divided pieces 10 divided in the tube axis direction. □, 10□ So, 10 divided pieces for my husband! The contact surfaces of and 102 are fixed watertightly by welding or other methods.

Reference numeral 11 denotes protective concrete provided at the piping construction site of the transport pipe 1, and the main pipe 1° can be reliably fixed to the foundation ground 4 by this protective concrete 11.

12 is a water control valve fixed to the upper open end of the case body 10; 13 is an intermediate cylinder fixed to the upper part of the water control valve 12; 14 is a perforator fixed to the upper part of the intermediate cylinder 13; 1
40 cutters 15 are positioned within the intermediate cylinder 13.

In this way, the water control valve 12, the intermediate cylinder 13, and the perforator 14 are provided in the case body 10, and the water control valve 12 is first fully opened to operate the perforator 14, and the cutter 15 in the intermediate cylinder 13 is opened. Lower it and cut the main pipe 1□.

At this time, the live water in the transport pipe 1 fills the case body 10, but since watertightness is ensured, there is no risk of leakage to the outside.

Next, after raising the cutter 15 of the drilling machine 14, the water control valve 12 is closed and the intermediate cylinder 13 is removed from the water control valve 12 together with the drilling machine 14.

Next, the insertion machine 18 connecting the intermediate cylinder 16 and the fluid control valve 17 is attached to the water control valve 12, and then the water control valve 12 is fully opened, the insertion machine 18 is operated, and the fluid control valve 17 is lowered. , the case body 1 is inserted into the case body 10 in a watertight manner.
This fluid control valve 17 is rotatably fixed by a fixing bolt 19 provided at 0.

After the fluid control valve 17 is rotatably and watertightly fixed in the case body 10 in this way, the 18 and the intermediate cylinder 16 are connected after insertion.
! l] Remove the water valve 12 together with the watertight lid 21 and attach it to the mounting part of the fluid control valve 17 of the case body 10 via the backing 20.
to be fixed.

As mentioned above, the present invention describes a method of installing fluid control valves 17 at required locations of fluid transport pipe 1, but this can also be applied to installing branch pipes, and a method of cutting main pipes is also described. However, the present invention is not limited to this embodiment.

In the past, it was common practice to perform piping work by interrupting the supply of live water in transport pipes, and it was not possible to eliminate various problems caused by water outages.

Furthermore, if the fluid transport pipe 1 is a fragile pipe such as an asbestos-cement pipe, there is a risk that the main pipe will be damaged when the main pipe is cut, resulting in an unexpected disaster.

However, in the present invention, when performing piping work at the required locations of the fluid transport pipe, the auxiliary pipes are integrally fixed to the joints provided at both ends of the main pipe, and the case body is fixed to both of the auxiliary pipes. However, since the auxiliary pipe and the necessary parts of the case body are fixed to the foundation ground with concrete, no pressure is applied to the main pipe, and even if the main pipe is a weak pipe as mentioned above, it can be used as a transport pipe. The function of the pipe does not change, and the desired piping can be easily constructed.

The present invention is industrially effective and convenient in these respects.

[Brief explanation of the drawing]

The drawings show the uninterrupted water piping construction method of the present invention. Figure 1 is a side view of the auxiliary pipe fixed to the main pipe, Figure 2 is a side view of the case body installed, Figure 3 is its enlarged sectional view, and Figure 3 is a side view of the auxiliary pipe fixed to the main pipe. FIG. 4 is a side view of the drilling machine installed, FIG. 5 is a side view of the fluid trundle valve insertion machine installed, and FIG. 6 is a side view of the fluid control valve installed. 1...Fluid transport pipe, 2...Joint, 3...Drilling ring,
4... Foundation ground, 5... Auxiliary pipe, 6... Rubber backing, 7... Push ring, 8... Inlet, 9... Filler, 10... Case body, 11... ...Protective concrete, 12... Water control valve, 13... Intermediate cylinder, 14...
Drilling machine, 15... Cutter, 16... Intermediate cylinder, 17.
...Fluid control valve, 18...Insertion machine, 19...Fixing bolt, 20...Backing, 21...Watertight lid.

Claims (1)

[Claims] 1 A joint that is watertightly fixed to both ends of each main pipe of a fluid transport pipe consisting of a plurality of main pipes, which is installed so as to be exposed within an excavation ring that excavates a part of the earth and sand at a buried location, and A predetermined length of auxiliary pipe that covers the main pipe and the ends of the main pipe is integrated by injecting a fluid filler that solidifies over time, and both ends are integrally fixed to each end of the main pipe. Straddle the corresponding end of the auxiliary pipe and fix the case body with a fixing bolt provided at the upper open end to rotatably fix the fluid control valve in a watertight manner, and connect the necessary parts between these auxiliary pipes and the case body. A method for constructing water-resistant piping using a fragile pipe, characterized in that the pipe is fixed to the foundation ground provided at the bottom of the excavation trench.