JPS60109688A - Method and device for installing ceaseless water of expansion flexible joint pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an installation apparatus for cutting an existing pipe and inserting and installing a joint pipe into the cut portion while maintaining water supply.

In general, pipes buried underground can withstand a certain amount of ground subsidence and seismic motion at the joints, but if the joints are subjected to further ground subsidence or earthquakes, the joints may separate or break, or in some cases The pipe opening may be damaged. In order to deal with this, in recent years, flexible structures have been developed in which pipelines are constructed using slide joints and flexible pipes, so that they can flexibly handle large ground subsidence and seismic motion. The idea of conduits is being adopted. For this reason, structures that allow large displacements in the joints have been developed.

However, in the case of conventional flexible structure construction, it is necessary to cut off the water flowing through the pipe at the upstream and downstream ends of the construction section.
The method used was to cut off the water supply and then insert a flexible joint, which caused great inconvenience to users of the water supply section.

For this reason, the present applicant previously disclosed Japanese Patent Application No. 55-125360 (Japanese Unexamined Patent Publication No. 57-51090, hereinafter referred to as prior art).

) proposed an uninterrupted water installation method for expandable flexible joint pipes and the joint pipes. That is, the method of the prior art includes: (1) installing a flexible elastic joint divided into upper and lower cases into a part of the existing pipe in a watertight manner (a water control valve and an internal The process of installing a cutting machine with a cutter in a watertight manner in order: ■ Opening the water control valve, cutting the existing pipe by rotating the cutter, and then pulling the cutting pipe together with the cutter above the water control valve; The process of closing the water valve and attaching an inner cover insertion device having an inner cover that tightly contacts the inner wall of the main cylinder of the joint on top of the water valve; 5) Opening the water control valve;
After inserting the inner cover into the main cylinder and fixing it with the bolt below the bolt, the process of removing the inner cover insertion device and leprosy I water valve while leaving the inner cover, and engaging the outer cover with the inner cover. The flexible joint pipe can be installed in the existing pipe without water interruption.

However, depending on the prior art, since the case for performing continuous water perforation is made into a part of the joint pipe as it is,
The case has a large diameter, which increases the resistance to water flow at the joint.

In view of the above-mentioned circumstances, the present invention provides an improved water-tight installation method of a flexible flexible joint pipe and an apparatus therefor, and has been made by focusing on the elastic characteristics of a flexible flexible joint. be.

In other words, the uninterrupted water installation method of the expandable flexible joint pipe invented by Wood is: 1. A step in which two attached pipes having flanges are placed on an existing pipe with the flanges facing each other; 2. A casing is installed across the two flanges. The process of installing the pipe watertightly, ■ The process of cutting the existing pipe without water interruption through the working water control valve attached to the top of the casing, ■ The process of cutting the existing pipe while keeping the water supply shut off while making it expandable and contractible and having flanges at both ends. The process of inserting the work water control valve into the cut part, the operation rod inserted into the casing through the flange of the attached pipe is engaged with the flange of the joint pipe. Attraction,
A step of temporarily fixing both after colliding with the flange, ■
It consists of the process of permanently fixing the flange of the attached pipe and the flange of the joint pipe, and then removing the remaining members.

Further, the water-tight installation device for an expandable flexible joint pipe of the present invention is used in the above installation method, and includes: (1) a body, a flange stretched outwardly from one end of the body; It consists of two attached pipes that are attached to the existing pipe with their flanges facing each other, and two attached pipes that are fixedly installed in the body of the attached pipe and that are connected by a screw feeding mechanism. a pulling tool that moves an operating rod having a threaded portion at its tip to advance and retreat through the flanges of the attached pipes in a watertight manner; (1) a casing that is watertightly mounted across the flanges of the two attached pipes; Consisting of

Note that the method of the present invention is not limited to the use of the above-mentioned apparatus as a means for carrying out the method.

Hereinafter, embodiments of a method for installing an expandable flexible joint pipe without water interruption and an installation apparatus thereof will be described.

Figures 1 to 7 show details of each member used on the nut male side.

Here, P is an existing fluid pipe, and Q is a hole cut into the fluid pipe P by a drilling machine.

Reference numeral 1 denotes an attached pipe, which is constructed into two halves IA and IB, and their abutting portions are joined by welding and assembled integrally.

Two pieces of the same shape are prepared as the attached pipes 1 and attached and fixed to the existing pipe P.

The attached pipe 1 includes a body 11, a flange 12 extending outward from one end of the body 11, and a joint port 13 provided at the other end of the body 11. The inner diameter of the body 11 is the existing pipe P.
The diameter is slightly larger than the outer diameter of the cylinder, allowing some rotation. Moreover, four parts 11a are formed on the outer circumferential surface thereof, on which a fixing base of a pulling tool to be described later is installed. An appropriate number of port through holes 12a are bored in the flange 12 in the circumferential direction. The joint port 13 includes a socket part 13a, and a rubber ring 13b placed inside the socket part 13a (separated from one piece and joined after installation).
, a push ring (split into two) 13C1 that presses the rubber ring 13b, and a fastener 13d made of a port, and serves to make the end of the attached pipe l watertight.

Reference numeral 2 denotes a pulling tool, which is attached to the attached pipe 1 and performs a pulling operation of the telescopic flexible joint pipe, which will be described later.

The puller jL,2 is composed of a fixing base 21, a female threaded cylinder 22, and an operating rod 23. The fixed base 21 is divided into two parts, and a front flange 211 and a rear flange 212 are provided at the front and rear parts, respectively, and a through hole 2 is provided in each.
11a and 212a are drilled. Also, a side flange 213 is stretched between the two halves of the fixing base 21 and the opposing ends thereof, and the side flanges 213 are tightened by the ports 24 to fix the fixing base 21 to the attached pipe 1. .

The female threaded tube 22 is made slightly shorter than the distance between the front and rear flanges of the fixing base 21, and as it moves in the tube axis direction, one of its both end surfaces collides with one of the front and rear flanges 211 and 212. A female threaded hole 2-2a is screwed into the inner periphery of the female threaded cylinder 22.

The operating threaded rod 23 is made of a long rod-like body, and has a tip threaded portion 23a at the front end, a non-threaded portion 23b from the tip threaded portion 23a to the vicinity of the center, and a threaded portion from the center to the rear end. 23c, and a spanner hook portion 23d is formed at the rear end portion. Note that the operating rod 23 is one mode of the operating rod, and the present installation method is not limited to this mode.

The female threaded hole 22a of the female threaded cylinder 22 and the threaded portion 23c of the operating threaded rod 23 are in a threaded engagement, and Configure the screw feeding mechanism. Then, the operating threaded rod 2 is rotated in the forward and reverse directions of the female threaded tube 22.
Perform the forward and backward operations in step 3.

Reference numeral 3 denotes a watertight lid, which maintains the operating threaded rod 23 inserted into the through hole 3a in a watertight manner with a backing 31. The watertight lid 3 is connected to the port 3 through a gasket 32.
A faces the bolt through hole 12a of the flange 12 and is temporarily fixed.

A plug 41 is attached to the bolt through hole 12a of the flange 12 through which the operating threaded rod 23 is not inserted, and seals the bolt through hole 12a watertight.

The plug 41 is temporarily fixed in the bolt through hole 12a by abutting the tip of the plug push port 42 screwed into the screw hole of the front flange 211 of the fixing base 21.

Reference numeral 5 designates a casing, in which an upper casing 51 that is open up and down and a lower casing 52 with a bottom are assembled together with flanges 511 and 521 by abutting each other with a pole 5A. 512 is a partial casing 51
At the upper flange of the casing 5, a working valve or a blind cover, which will be described later, is attached to the upper part of the casing 5 through a bolt through hole 512a formed in the flange.

Reference numeral 53 is a mounting port formed in a protruding manner on both sides of the casing 5, and the mounting hole 53a is provided on the inner circumference of the port 53.
is formed, and a backing 54 is attached to the flange 12 of the attached pipe l.
are fitted watertight through the

The above attached pipe 1, puller 2 and casing 5 (including the watertight lid 3, plug 41, and push port 42 for the plug) allow the uninterrupted water installation device for the flexible joint pipe of the present invention to be installed. Configure.

Reference numeral 6 denotes a flexible joint, which includes a sleeve 61 having flanges 611 stretched inward at both ends thereof, and a stopper 62 inserted concentrically into both ends of the sleeve 61.
1. two inlet tubes 62 with outward flanges 622;
and a sealing member 63 fitted into the gap between the sleeve 61 and the insertion tube 62. 64 is a gasket fixed to the flange 622 surface of the inlet tube 62.

The sealing member 63 is constructed by assembling a receiving ring 631 with a T-shaped cross section and a push ring 632 through a port 633 that is screwed into the push ring 632 from the outside, and is formed into two stages, an inner and an outer part. Inner and outer backing 6
34.635 is installed.

Note that this telescopic flexible joint half-tube 6 has already been proposed by the present applicant in Utility Model Application No. 55-162151 (Utility Model Application No. 57-85687) and Utility Model Application No. 57-73518. Its detailed structure and mechanism will be omitted.

The telescoping flexible half-tube used in the present invention is not limited to the structure shown, and does not preclude the use of standard telescoping flexible half-tubes. In short, it is sufficient that the joint half-tube used has flanges at both ends, or has flanges attached thereto.

7 is a hanging device, which is a sleeve 6 of the expandable flexible joint half pipe 6;
The joint half-tube 6 is suspended using the port h6A of 1.

Reference numeral 8 denotes a temporary support stand, which holds the joint half pipe 6 in the casing 5 in alignment with the pipe axis of the existing pipe P.

Reference numeral 9 denotes a bolt for main fixing that is screwed across the bolt through hole 12a of the flange 12 of the attached pipe 1 and the threaded hole 622a of the flange 622 of the expandable flexible joint half pipe 6.

The water-interruption installation method of the present invention is carried out using the above-mentioned apparatus according to the following procedure.

(1) Ground H at the location where the expandable flexible joint half-pipe is planned to be installed
excavate to secure a working space (■), and install a concrete base J on the ground below the existing fluid pipe P. Thereafter, the attached pipes 1 are fitted onto the existing pipes P at desired positions with their flanges 12 facing each other, and their abutting portions are welded watertightly (see FIG. 8).

(2) The lower casing 52 is installed on the concrete base J via the pedestal K, and the upper casing 51
The flanges are joined to each other on the lower casing 52, and the mounting is done in a watertight manner (see FIG. 9). At this time, when installing the casing 5, the opening 53 is fitted into the flange 12 of the attached pipe 1 without water damage.

(3) A rubber ring 13b and a push ring 1 are attached to the socket 13a of the attached pipe 1.
3c and the fastener 13d are installed to make the attached pipe 1 watertight, and the pulling tool 2 is externally installed on the attached pipe l via the fixing base 21. At this time, the tip of the operating threaded rod 23 is inserted into the bolt through hole 12a of the flange 12 of the attached pipe 1, and is sealed with the watertight lid 3. The other bolt through holes 12a are sealed with the plug 41 and the plug push port 42. Next, a blind lid is attached to the casing 5, and after a water pressure test is performed to confirm watertightness, the blind ML is removed.

(4) A working gate valve V is installed on the casing 5, and a perforator R is installed on the working gate valve V via an intermediate cylinder M (see FIG. 10).

(5) Open the work gate valve V, rotate the cutter S of the punching machine R, and punch and cut the existing pipe P. Next, the cutter S holding the cut piece is raised above the gate valve V, and after closing the gate valve V, the punch R and the intermediate cylinder M are removed.

(8) Install the insertion machine T on the gate valve V via the intermediate cylinder N in which the telescopic flexible joint half-tube 6 is contracted and accommodated (see Fig. 11). After that, the gate valve V is opened and the insertion machine T is operated to lower the joint half pipe 6 to a predetermined position (that is, the position where the flange 12 of the attached pipe I and the flange 622 of the joint half pipe 6 face each other). let

At this time, the joint half-tube 6 is temporarily placed on the stand 8.

The joint half-pipe 6, the existing pipe P, and the attached pipe 1 can be easily aligned.

(7) In the above state, rotate the female threaded cylinder 22 of the pulling tool 2 in the forward direction to push the operating threaded rod 23 into the casing 5 (see FIG. 4). When the tip of the operating screw forest 23 reaches the screw hole 622a of the flange 622 of the joint half pipe 6, a spanner (not shown) is engaged and rotated to the spanner hook 23d at the rear end of the operating screw rod 23, and the operating screw is tightened. Thread the tip threaded portion 23a of the rod 23 into the threaded hole 622a of the flange 622,
The operating threaded rod 23 and the flange 622 of the joint half pipe 6 are connected.

(8) Next, reversely rotate the female threaded cylinder 22 of the pulling tool 2 to pull the insertion tube 62 of the connecting rod tube 6, and connect the flange 622 of the insertion tube and the flange 12 of the attached tube 1 with the gasket 6.
4 (see Figure 5). In this state, the attached pipe 1 and the connecting rod pipe 6 are temporarily fixed in a watertight manner, and the water on the outside is in a static pressure state.

(9) After draining the water in the intermediate tube N and casing 5 to the outside and disconnecting the insertion machine T from the connecting rod tube 6, it is attached to the bolt through hole 12a of the flange 12 of the attached tube 1. Remove the attached plug 41, and then screw the port 9 into the bolt hole 622a of the connecting rod tube 6 through the bolt through hole 12a to permanently fix the attached tube 1 and the connecting rod tube 6. (See Figure 6). Also, hole inserter T and intermediate cylinder N.

The attachment of the connecting rod pipe 6 to the existing vP is completed by removing the gate valve V, then removing the upper casing 51, the support stand K, the lower casing 52, and the pulling tool 2 (see Fig. 7). ).

After that, after each tightening section is tightened again, the work gate valve in the ground H is backfilled.

The method for installing an expandable and flexible jointed rod pipe without water interruption and the installation device thereof according to the present invention have the above-described configuration, but are not limited to the configuration of the above embodiment, and depart from the basic technical idea of the present invention. Various design changes are possible within the range. That is, the following aspects belong to the technical scope of the present invention.

(2) In this embodiment, the attached pipe and the fixing base 2 are divided into two parts, but as the pipe diameter becomes larger, they can be divided into three or more parts.

(2) The recess 11a in the body of the attached pipe can be omitted as appropriate.

(2) The joint port 13 of the attached pipe is not limited to a mechanical joint, but may take other forms as long as it has a water-sealing effect.

■ The forward/backward drive of the operating rod 23 is not limited to screw drive.
For example, it can be driven by hydraulic pressure. Further, the engagement means for the tip end of the operating rod is not limited to the screw 23a, but may be any other appropriate means (for example, pin connection).

The present invention has the above configuration and has the following effects.

(2) According to this installation method, the expandable and flexible joint rod pipe used can have a diameter that matches the diameter of the existing pipe if possible, and the resistance to water flow at the joint can be made as small as possible.

- In this installation method, the only member left at the joint is the attached pipe, and other members of the water-tight installation device can be reused, leading to savings in materials.

■ According to this installation method, a standard expandable and flexible joint rod pipe is used, so the joint part has excellent expandable and flexible performance, allowing for high-quality construction.

■ According to this installation device, it has multiple functions such as moving in and out the operating threaded rod of the attached pipe, fitting it with the casing, and joining with the connecting rod pipe, which helps simplify the device as a whole. .

[Brief explanation of drawings]

This figure shows an example of an uninterrupted water installation method and device for a pipe with continuous water supply. Figure 2 is a cross-sectional plan view taken along the X-X line in Figure 1, Figure 3 is a cross-sectional view taken along the Y-Y line in Figure 2, and Figures 4 to 6 show the relationship between the attached pipe and the pulling tool. FIG. 7 is a partial sectional view after the installation of the telescopic flexible joint rod tube is completed, and FIGS. 8 to 11 are process explanatory views. P...Existing fluid pipe Q...Drilling 1.
... Attachment pipe 11 ... Body part 12 ...
...Flange 13...Joint opening 2...
... Pulling tool 21 ... Fixing stand 22 ...
・Female threaded tube 23 ・・Operating threaded rod 23a・
...Tip threaded part 23c...Threaded part 3
...Watertight lid 5 ...Casing 53
......Installation 1 piece 6...Telescopic flexible joint pipe V...Work gate valve R...Drilling machine S...Cutter T... Insertion machine patent applicant Cosmoe Machine Co., Ltd. agent Patent attorney Ike 1) Hitoshi

Claims (1)

[Claims] '1. A method for installing an expandable flexible joint pipe without water interruption, which comprises the following steps (1) or a few steps. (T' The process of attaching two attached pipes with flanges to the existing pipe with the flanges facing each other. ・■ The process of installing the casing watertightly across the two flanges. ■ The process of attaching the casing to the top of the casing. The process of cutting the existing pipe without stopping the water supply through the water control valve. (Φ The process of inserting a flexible joint pipe with flanges on both ends into the cut part through the working water control valve while reducing the size of the joint pipe.) (6) The operating rod inserted into the casing through the flange of the attached pipe is engaged with the flange of the joint pipe, drawn to the flange of the attached pipe, and collided with the flange to temporarily fix the two. Process. ・6) After the flange of the attached pipe and the flange of the joint pipe are permanently fixed, the remaining members are removed. flange,
and a joint port provided at the other end of the body, and two attached pipes attached to the existing pipe with the flanges facing each other, and fixedly installed on the body of the attached pipe. , a puller for moving an operating threaded rod having a threaded portion at its tip forward and backward through the flange of the attached pipe in a watertight manner using a screw feed mechanism; An uninterrupted water supply installation device for a telescopic flexible joint pipe, consisting of a casing that is made of water, and a flexible joint pipe.