JPH03265797A - Method of installing fluid control valve, etc. without cutting water and its sealed connection device - Google Patents

Abstract

PURPOSE:To prevent rust generation from a cut face by arranging the constitution such that a packing is pressed against the cut face of a fluid pipe on the side of a fixed connection ring by the shifting of a first receiving ring and that a packing is pressed against the cut face of the fluid pipe on the side of a movable connection ring by the shifting of a second receiving ring. CONSTITUTION:The sealed connection device is mainly composed of fixed and movable connection rings 1 and 2, which are arranged at the right and left on the P side of a fluid pipe with a fluid valve V between, a first receiving ring 3, which is arranged on the side of the fluid control valve V so that it may correspond to the fixed connection ring 1, and a second receiving ring 6, which is arranged to correspond to the movable connection ring 2 and consists of an outer ring 4 and an inner ring 5. In the installation of the fluid valve V into the cut part, the shifting in the axial direction is guided by the sliding actions between the sliding guide 8 provided at the bottom of the sealed case S for work and each flange 12, 18, 32, and 49 of a regular sealed connection device, the installation work is performed smoothly and easily. Moreover, the cut faces Q of the cut parts are sealed by sealing members 20 and 52, and the rust generation from these cut faces Q can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION A.Objective of the Invention [Industrial Application Field] This invention provides a method for controlling existing fluid pipes, such as water pipes, to maintain an uninterrupted state (pre-installed control of the flow of water in the existing pipes). Regarding the so-called uninterrupted fluid control valve installation method, which involves installing a fluid control valve in a state where the water is flowing without stopping it with a water valve, in more detail, the pipe line is cut orthogonally in a sealed enclosure. The present invention also relates to a method for installing the fluid control valve in the cut portion, and a device for installing the same.

[Prior Art] As this type of technology, the one disclosed in Japanese Patent Publication No. 51-42193 is known.

That is, according to the known technique, a pair of split joint rings are made slidable on the pipe peripheral surface corresponding to both sides of the installation location of the fluid control valve, and then the fluid control valve is installed including these split joint rings. After enclosing the part with a sealed casing, cutting out the installation part of the fluid control valve in the casing with a cutter, and installing the fluid control valve in the cut part in a state that restricts movement in the pipe axis direction. After it is installed, the split rings located on both sides are pushed from both sides toward the fluid control valve from the outside so that they straddle the connection flange part of the fluid control valve and the pipe end of the cutout part. Therefore, after the two pipes are connected by fitting, the fluid control valve is installed in the middle of the pipe by removing the outer casing.

However, according to publicly known technology, the cut end face of the cut fluid pipe is exposed and constantly in contact with the fluid inside the fluid pipe, and depending on the corrosive fluid, corrosion may start from the cut end face and cause early deterioration. There is a problem with progress.

[Problem to be solved by the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose (technical problem) is to provide a new method of installing this type of fluid control valve without water interruption, in which rust does not occur at the cut part. do.

Configuration of the Invention [Means for Solving the Problems] The method for installing a fluid control valve without water interruption of the present invention is distantly related to the above object, and thus adopts a configuration (technical means) consisting of the following steps. In other words, in a method for installing a fluid control valve without water cutoff, in which a fluid pipe is cut into a straight pipe shape using a cutting machine in a sealed case, and then a fluid control valve is inserted and installed into the cut section, both sides of the installation location of the fluid control valve are cut in advance. A process of slidably attaching a fixed connection ring on one side and a movable connection ring on the other side to the circumferential surface of the pipe corresponding to the above, after cutting the fluid pipe with a cutting machine, attaching the fixed connection ring on one side to the cut part. A first joint ring that holds a sealing material that comes into contact with the cut end surface of the ring side is attached, and an expandable second joint ring that holds a sealing material that comes into contact with the cut end surface of the movable connecting ring side is attached to the other side. Step of inserting the fluid control valve equipped with the second joint ring, pressing the movable connecting ring along with the fluid control valve in the pipe axis direction to engage the fixed connecting ring and the first joint ring in a watertight manner. and then retracting the movable connecting ring via the second joint ring.

In addition, the close connection device implements a water-interruption installation method for fluid control valves in the process, and is a fixed connection that is installed in a watertight manner on the pipe circumferential surface on one side of the insertion installation location of the fluid control valve. a movable connecting ring that is slidably and watertightly attached to the pipe circumferential surface on the other side of the insertion location of the fluid control valve;
A first joint ring is mounted on one side of the fluid control valve to be inserted and installed in correspondence with the fixed connection ring, and a first joint ring is attached to the movable connection ring on the other side of the fluid control valve to be inserted and installed. It is characterized by comprising a second joint ring which is attached correspondingly and is expandable and retractable in the tube axis direction.

[Effect]

When the first joint ring moves, the backing presses into contact with the cut surface of the fluid pipe on the side of the fluid ring of the fixed connection ring example, and as the second joint ring moves, the backing comes into contact with the cut surface of the fluid ring of the movable connection ring example. are pressed into contact.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a method for installing a fluid control valve without water interruption and a sealing connection device thereof according to the present invention will be described with reference to the drawings.

(Example device) Figures 1 and 2 show an intermediate step in the method of the present invention (a state immediately after the fluid valve is inserted), and the entire sealing connection device of one example is shown. .

In the figure, P is a fluid pipe such as a main water distribution pipe, Q is a cut portion thereof, S is a closed case for working, and ■ is a fluid control valve to be inserted.

(sealed case for work) First, the sealed work case S will be explained.

The work sealed case S includes an upper case 100 and a lower case 10.
It is formed into two halves in a plane including the tube axis with 1, and the flanges 102 and 103 are brought into contact with each other, and the bolts 104 are used to tighten them and assemble them integrally. An insertion hole 106 through which the fluid pipe P is inserted is formed at both ends in the tube axis direction, and a stopper 107 is fixed on the inner surface of the sealed case S facing the insertion hole 106. A backing 10B is attached to the gap between the fluid pipe P and the fluid pipe P.

Reference numeral 109 denotes a press ring that presses the backing 108, and the press ring 109 is screwed into the main sealed case S and is advanced with a bolt 110.

Further, a detachment prevention device 111 is attached to the push ring 109 to prevent the bolt from biting into the fluid pipe P and detaching from the push ring 109.

This sealed case S has a substantially horizontally cylindrical shape, but has a rectangular opening 113 at the top, and a flange 114 on the top end surface for connecting other devices to be described later. A guide rail 115 is provided at the opening 113 on the inner surface of the sealed case S.
It is installed vertically facing the city.

116 is a working window that can be opened and closed.

A drain pipe 118 is arranged at the lower bottom of the sealed case S, and support legs 11 that support the entire case S are provided at the bottom.
9 is provided.

(Sealing Connection Device) Therefore, the sealing connection device of this embodiment is installed in the working sealed case S at the connection part attached to the fluid pipe P side and to the inserted fluid control valve V side. It consists of a connecting part.

That is, this sealing connection device includes fixed and movable connection rings 1.2 arranged on the left and right sides of the fluid pipe P side with the fluid valve V in between, and fixed and movable connection rings 1.2 arranged corresponding to the fixed connection rings 1 on the fluid control valve V side. and a second joint ring 6 arranged corresponding to the movable connecting ring 2 and consisting of an outer ring 4 and an inner ring 5.
The main components include:

The present sealed connection device also includes an intervening ring 7 as an auxiliary structure. A sliding guide tool 8 and a pusher tool 9 are included, and are used for the mounting operation of this sealing connection device.

The detailed structure of each part of this sealed connection device will be explained below.

In the following description, the front and rear parts are defined as the side facing the fluid valve V as the front part, and the side facing away from the fluid valve as the rear part.

FIG. 3 shows the present sealed connection device taken out.

In the figure, the fixed connection ring 1 is made of a two-piece body, and is watertightly attached around the pipe P with a backing 10, and has an annular horizontal collar 11 projecting in the horizontal direction at the front and a horizontal collar 11 projecting outward in the pipe radial direction. It has a flange portion] 2. Further, at the rear part, a flange part 13 protruding outward is formed with a rubber ring accommodating recess 14 inwardly, and a rubber ring accommodating recess 14 is formed inwardly.
A rubber ring]5 is housed inside, and a flange part]3
It is pressed by a press ring 16 which is held together via a bolt.

The first joint ring 3 is a one-piece tubular body and is installed in correspondence with the fixed connection ring 1. That is, at the rear part of the first joint ring 3, there is a flange part 18 that abuts against the flange part 12 so as to fit into the shape of the front part of the fixed connection ring 1.
Further, a right-angled recess 19 is formed, which is bent at a right angle to receive the horizontal collar 11.

The flange portions 12.18 are inserted into bolt insertion holes opened at corresponding positions and are tightened together by bolts. Therefore, the vertical wall surface 1 of this right-angled recess 19
9a extends until its inner diameter end at least meets the inner diameter of the fluid pipe P. That is, the right-angled recess 19 may protrude into the inner surface of the fluid pipe P, but this increases fluid resistance, which is disadvantageous. A sealing material 20 is fixedly attached to this vertical wall surface 19a. The sealing material 20 forms an annular plate with a predetermined thickness. Further, an annular groove is formed in the circumferential wall surface 19b of the right-angled recess 19, into which the backing 21 is fitted.

The backing 21 abuts against the horizontal collar 11 of the fixed connection ring 1 to provide a watertight effect.

A flange 23 is stretched outward on the front part of the first joint ring 3, and the flange 23 is fixed to the valve box of the fluid valve V with bolts 24 at multiple locations in the circumferential direction. Ru.

The movable □ connecting ring 2 is made of a two-piece body, and has substantially the same structure as the fixed connecting ring 1, except that it has a movable function. That is, the rear part includes a packing 26, a flange portion 27, a rubber ring housing recess 28, a rubber ring 29, and a press ring 30.
are respectively formed, which corresponds to the configuration of the rear part of the fixed connecting ring 1. At the front part, a flange part 32 protruding outward is provided, and a right-angled recess part 33 is provided inwardly.
is formed.

The second joint ring 6 has a telescopic function due to the combination of the outer ring 4 and the inner ring 5, which are integral tubular bodies, and is installed corresponding to the movable connecting ring 2. More specifically, the front part of the outer ring 4 has a flange part 36 extending outward, and is fixed to the fluid valve V with bolts 37.

A flange portion 39 is also extended outward at the rear part of the outer ring 4,
Horizontal tapped holes 40 are opened in the flange portion 39 at predetermined intervals in the circumferential direction parallel to the tube axis, and vertical tapped holes 41 are opened between the horizontal screw holes 40 in the direction of the center of the tube axis. There is.

An extrusion screw 43 is screwed into the horizontal threaded hole 40, and a tightening screw 44 is screwed into the vertical screw hole 41.

The inner ring 5 is disposed overlappingly within the inner diameter of the main body of the outer ring 4, and a backing groove is formed in the outer circumferential surface of the front end of the inner ring 5. It comes into contact with the surrounding surface to create a watertight effect.

Further, the rear part of the inner ring 5 has a shape corresponding to the front part of the movable connecting ring 2. That is, a flange portion 49 is formed that projects outward from the rear end surface by a circumferential surface 48 of a predetermined length, and the flange portion 49 abuts against the flange portion 32 of the movable connecting ring 2 . The flange portions 32 and 49 are inserted into bolt insertion holes opened at corresponding positions and are tightened together by bolts 11 2 . The flange portion 49 also serves as an abutting body for an extrusion screw 43 threaded onto the flange portion 39 of the outer ring 4 . The circumferential surface 48 from the rear end surface to the flange portion 49 is fitted into the right angle recess 33 of the movable connecting ring 2, and the circumferential surface 48
A backing 50 is attached to the backing groove formed in the backing groove, and forms a watertight connection with the movable connecting ring 2. A circumferential recess 51 is formed inward on the rear end surface, and a sealing material 52 is fixedly attached to this recess 51. The fourth part 51 has at least an outer diameter greater than or equal to the outer diameter of the fluid pipe P, and an inner diameter of the fluid pipe P.
The inner diameter of the Like the sealing material 20, the sealing material 52 forms an annular plate with a predetermined thickness.

In the sealed connection device of this embodiment having the above configuration,
Due to the relationship with the sliding guide 8 to be described later, the flange portion 12
．． 18, 32, and 49 have the same diameter.

Returning again to FIG. 1 and FIG. 2, the intervening ring 7, sliding guide 8, pushing tool 9, and other members will be explained.

(Intervening ring) The intervening ring 7 is made up of at least two parts, and the closed case S
The contact plate 107 is interposed in contact with the flange portion 13 of the fixed connection ring 1 of the present sealed connection device, so that the front end of the fixed connection ring 1, that is, the front end of the horizontal collar 11 faces the cutting portion. .

(Sliding guide tool 8) The sliding guide tool 8 has the function of supporting the sealing connection device including the fluid valve V below and guiding the sealing connection device when it moves in the tube axis direction.

More specifically, a guide box 60 is disposed at the center of the bottom of the sealed case S, while a base 62 is located at the center of the bottom of the sealed case S.
It consists of a base column 63 fitted so as to be vertically movable along the inner wall thereof, and a flat plate 64 on the base column 63. Information box 60 and base pillar 63
A key groove is provided vertically on the side surface of the base column 63, and a key 67 fixed to the sealed case S side is fitted into the key groove, whereby the screw rod is When the base column 66 rotates, the base column 63 moves up and down without rotating together. Guide vibros 9 are arranged side by side on a flat plate 64 of a base 62. Thus, the outer end surfaces of the lower parts of the flange parts 12, 32 of the connecting rings 1, 2, which connect the sealing connection device to the tank bottom, and the flange parts 18° 49 of the joint rings 3, 6 are brought into contact with this guiding vibro 9. be done.

(Pushing tool 9) The pushing tool 9 is provided on the axial side surface of the sealed case S at least on the side where the movable connecting ring 2 is arranged, and has the function of pushing the movable connecting ring 2 forward by operation from outside the sealed case S. .

More specifically, a circular hole 75 is formed in the side surface of the sealed case S, a guide cylinder 77 is fixedly installed outside the case S facing the circular hole 75, and a moving shaft 79 is installed inside the guide cylinder 77.
It extends into the interior of the building. The guide tube 77 and the moving shaft 79 are interlocked by a threaded rod 81, and the moving shaft 79 is prevented from rotating together with the threaded rod 81 by a key 82, and the moving shaft 79 is moved back and forth by the rotation of the threaded rod 81. Moving. A retainer 84 is attached to the tip of the moving shaft 79, and its front end surface 84a is connected to the flange 2 of the moving connecting ring 2.
7.

Note that this push-out tool 9 may be placed on both end faces of the sealed case S, and in this case, the movable connection ring 2 of the sealed connection device may be placed on either side, increasing the degree of freedom in mounting. do.

(Fluid Valve V) The fluid valve V of this embodiment is a so-called spiral valve, and a valve body 130 housed in a valve box performs opening and closing operations by rotation of a valve stem 132. The figure shows the open state.

The coupling rings 3, 6 of this sealing connection device are fixed directly to the valve body of this fluid valve.

The valve stem 132 is connected via a flange 133 at its upper end to a connecting body 136 attached to the lower end of a lifting shaft 135 of an insertion device, which will be described later.

That is, the connecting body 136 includes a cross-beam member 137 fixed to a lifting shaft 135 and a slider 1 having a rectangular cross section that is inserted into a groove 138 of the cross-beam member 137 and engaged through a pin 139.
It consists of 40. Both ends of the cross beam member 137 are slidably engaged with the guide rails 115 of the sealed case S described above.

The pin 139 is inserted into the bottle hole 142 provided in the cross beam member 137.
and the slide 5 6 is attached to the bottle hole 143 provided in the mover 140,
These pin holes 142 and 143 both have a long groove shape,
The bottle hole 142 allows axial movement of the fluid valve (1).

(Example Method) A method for installing a fluid control valve without water interruption using the sealing connection device of the present example described above will be described based on the drawings from FIG. 4 onwards. Note that FIGS. 1 and 2 show the construction in progress, and FIG. 3 shows the completed state.

(1) First, as shown in FIG. 4, a work space F is secured by excavating the ground E where the fluid control valve of the fluid pipe P is installed.

At this time, it is preferable that the ground at the bottom of the excavated hole be treated so that it has sufficient bearing capacity.

After the cutting machine H is attached to the water distribution main pipe P at the fluid control valve installation position, the fixed connection ring 1 and the movable connection ring 2 of the present sealed connection device are attached to the outside thereof. The rear backing 15, 29 and push ring 16.30 of the coupling ring 1.2 have been removed.

In the figure, 200 is the drive shaft of the cutting machine H, and 202
is the joint at its upper end.

(2) Attach the lower case 101 to the leg 119 of the sealed work case S.
Attach it around the fluid pipe 2 via the (see Fig. 5). Further, the interposed ring 7 is installed between the stopper 107 of the sealed case S and the rear end of the fixed connection ring l, and the sliding guide 8 is also installed by adjusting the level of its guide vibro 9.

Next, cover the upper case 102 of the sealed work case S,
Assemble the sealed work case S integrally. At this time, the openings 106 at both ends of the sealed case S are watertightly closed by the backing 108 and push ring 109, and the detachment prevention fitting 111 is not effective. After that, cover with the blind lid I and perform a water pressure test in this state (see Figure 6).

(3) If it is confirmed that the watertight condition is maintained,
Remove the blind cover ■ and place its flange 114 on the work case S.
The working water control valve J and furthermore the connecting pipe K are attached watertightly through the . The connecting tube K is provided with a working window. At this time, the working water control valve J is in an open state (see FIG. 7).

(4) After cutting, attach the drive device of the cutting machine H to the top of the connecting tube (see Fig. 8).

Figure 9 shows the drive shaft 204 of the drive device inside the sealed case S.
2 shows a connection state between the drive shaft 200 of the cutting machine H and the drive shaft 200 of the cutting machine H. As can be seen from the figure, the connection between the two is made near the bottom of the working water control valve J through the working window in the connecting tube.

In this state, the cutting machine H is driven to cut the fluid pipe P. The cutting mechanism of this cutting machine H is a known one, in which the rotation of the drive shaft 200 is divided into two directions by a bevel gear mechanism, and the cutting tool is applied to the outer peripheral surface of the fluid pipe P via a gear mechanism and a chain mechanism. They are brought into contact with each other and rotated around the fluid pipe 1 to cut the fluid pipe P into a straight pipe shape.

As a result of this cutting, the fluid in the fluid pipe P fills the working sealed case S, the working water control valve J, and the connecting cylinder, but the work is performed without overflowing to the outside without water interruption. Further, the chips are discharged from the drain pipe 118 at the bottom of the sealed case S along with running water.

(5) When the cutting work of the fluid pipe P is completed, pull up the cutting machine H while holding the cut piece.

Then, when the cutting machine H passes the working water control valve J, the working water control valve J is closed, and then the cutting machine H and its driving bag WL are removed (see FIG. 10).

(6) Next, the fluid valve insertion device M equipped with the fluid valve ■
Attach the top to the connecting tube in a watertight manner (Fig. 11). At this time, the joint rings 3 and 6 are attached to the fluid valve V, and the joint ring 6 is fixed in a contracted state.

Further, the elevating shaft 135 is in a contracted state. The fluid valve (1) is housed in the connecting tube in a watertight manner.

Thereafter, the working water control valve J is opened, the insertion device M is driven, the elevating shaft 135 is extended, and the fluid valve (2) is pushed into the working sealed case S.

At this time, the fluid valve V is lowered along the guide rail 115 inside the working sealed case S, so that it can be easily inserted into the cutting section.

The flange portion 18 of the joint ring 3, 6 attached to the fluid valve V.
When the vibrator 49 is seated 9 0 on the vibro 9 of the sliding guide 8, its descent is stopped.

FIGS. 1 and 2 show this state.

(7) Operate the pusher 9 to move the movable connecting ring 2 to the fluid valve V
Push it out in the direction of.

FIG. 12 shows its initial state.

That is, the end surface 84a of the engagement member 84 of the pusher 9 is brought into contact with the flange portion 27 of the movable connection ring 2.

In this state, the threaded rod 81 of the pusher 9 is rotated to move the moving shaft 79 forward. At this time, the tightening screw 44 of the second joint ring 6 is in a locked state.

FIG. 13 shows a state in which pressing forward movement has been completed.

As shown in the figure, the first joint ring 3 is fitted into the fixed connection ring 1, and the sealing material 20 attached to the joint ring 3 has a cut surface Q.
is pressed against. Moreover, the movable connecting ring 2 protrudes forward and closes the gap at the cut portion.

As a result, the water flowing in the fluid pipe P is completely stopped.

(8) The drain pipe 118 drains the running water inside the sealed work case S.
As shown in FIG. Push it back until it touches the cut surface Q.

After that, the working sealing case S, the working water control valve J, the connecting tube, etc. are removed, and the connecting ring 1 is removed from the sealing connection device.
．． A backing 5, 29 and push rings 16, 30 are attached to the rear of 2 to maintain watertightness.

In addition, in this step, if the running water in the sealed working case S is drained, the sealed working case S may be immediately removed.

(9) As shown in Fig. 15, the opening/closing device K is attached to the fluid valve ■.
N, and if necessary, install a base 0 at the bottom of the fluid valve V.

After that, a predetermined valve chamber treatment is performed and the ground E is backfilled.

As described above, according to the method of this embodiment, when inserting and installing the fluid valve V into the cutting part, the sliding guide 8 provided at the bottom of the working sealing case S and each flange 12 of the sealing connection device.
The sliding movement with 1B and 32.49 guides the movement in the axial direction, making the insertion and installation work smooth and easy.

Further, the cut surface Q of the cut portion is hermetically sealed with the sealing material 20.52, and rusting from the cut surface Q is prevented.

The present invention is not limited to the first embodiment, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included within the technical scope of the present invention.

■In the sealed connection device, sealing material 20 is applied to the joint rings 3 and 6.
．． 50 and that the joint ring 6 is expandable and retractable, other configurations are not limited to the configurations of the embodiments and may be modified as appropriate.

That is, the connecting ring 1.2 may be 30% or more,
Further, the rear part thereof may be made watertight by welding with a fluid pipe. The front portions of the joint rings 3 and 6 may be fixed to the fluid valve V by appropriate means such as welding. Further, the sealing material 52 may be attached directly to the end of the inner ring 5 without providing it in the recess 51. The connection rings 1, 2 and the joint ring 3.6 are sealed by a flange part 121 outside the backing 21.50.
8 and the flange portion 32.49 may also be a gasket or a backing.

FIG. 16 shows another manner in which the fixed connection ring 1 and the joint ring 3 are fitted together.

As shown in the figure, the horizontal collar is omitted in the fixed connection ring 1, and four parts 90 are formed in its place, and the joint ring 3 is provided with a horizontal collar 9I that projects rearward from the flange part 18. The flange portion 18 of the joint ring 3 is connected to the fixed connection ring 1
When the horizontal collar 9I collides with the flange portion 12 of the recess 9
0 and maintains watertightness by its banking 92, and furthermore, the sealing material 20 installed in the right angle recess 19 of the joint ring 3 connects the fluid pipe P with the cut surface Q1. This abuts to seal the cut surface Q.

■The method and device of the present invention are not only applicable to the installation of fluid control valves, but can also be applied to other uses, such as the installation of flowmeters, and in short, the method and device of the present invention can be applied to the installation of a flow meter, and the key is to attach the joint ring 3 4 3.6 to the object. It's enough.

C1 Effects of the Invention According to the present invention, the cut surface of the fluid pipe cut into a straight pipe is hermetically sealed by the sealing member held by the present sealing connection device, thereby reliably preventing rust from forming on the cut surface. can do.

[Brief explanation of drawings]

The drawings show an embodiment of the method for installing a fluid control valve, etc. without water interruption according to the present invention and its sealing connection device, and FIG. )
, FIG. 2 is a partially sectional side view thereof, FIG. 3 (8) is an enlarged view of the main part of the device of the present invention, and FIG. 3(b) is an enlarged view of part A in FIG.
(c) Figure is an enlarged view of part B in Figure (a), Figure 4 is an initial process diagram, Figure 5 is a process diagram following Figure 4, Figure 6 is a process diagram following Figure 5, Figure 7 is a process diagram following Figure 6, Figure 8 is a diagram showing the cutting process, Figure 9 is the inside of the cutting state, Figure 10 is a diagram of the cutting machine and the process of pulling up the cut piece, and Figure 11 is a diagram of the fluid valve. The insertion process diagram, Figure 12 is the initial T process diagram of the fluid valve connection operation,
Fig. 13 is an intermediate process diagram of the fluid valve connection operation, Fig. 14 is a completed process diagram of the fluid valve connection operation, Fig. 15 is a diagram of the completion of fluid valve installation, and Fig. 16 is a diagram of the connection ring and joint ring. FIG. 7 is a diagram of another connection mode. P...Fluid pipe, Q...Cut surface, S...Work seal case, ■...Fluid valve, 1...Fixed connection ring, 2...
Movable connection ring, 3... first joint ring, 6... second joint ring, 20.52... seal member

Claims (1)

[Scope of Claims] 1) A method for installing a fluid control valve without water interruption, in which a fluid pipe is cut into a straight pipe by a cutting machine in a sealed case, and then a fluid control valve is inserted and installed in the cut portion, comprising: A process of slidably attaching a fixed connecting ring to one side and a movable connecting ring to the other side of the pipe circumferential surface corresponding to both sides of the valve installation point.After cutting the fluid pipe with a cutting machine, , a first joint ring holding a sealing material that comes into contact with the cut end surface of the fixed connection ring side is mounted on one side, and a first joint ring holding a sealing material that comes into contact with the cut end surface of the movable connection ring side on the other side. a step of inserting a fluid control valve equipped with an expandable second joint ring held by the user; pressing the movable connection ring together with the fluid control valve in the pipe axis direction to connect the fixed connection ring and the first joint ring; A method for installing a fluid control valve without water interruption, comprising the steps of: engaging the movable connecting ring in a watertight manner; and then retracting the movable connecting ring via the second joint ring. 2) The method of installing without water interruption according to claim 1, in which a flow meter is installed in place of the fluid control valve. 3) A fixed connection ring that is installed in a watertight manner on the pipe circumferential surface on one side of the fluid control valve insertion location, and is slidable on the pipe circumferential surface on the other side of the fluid control valve insertion location. a movable connection ring that is installed in a water-tight manner on one side; a first joint ring that is installed in correspondence with the fixed connection ring on one side of the inserted fluid control valve; and a first joint ring that is installed in correspondence with the fixed connection ring; A sealing connection device comprising: a second joint ring attached to the other side of the control valve in correspondence with the movable connection ring and expandable and retractable in the pipe axis direction.