JP2649426B2 - Non-stop water installation method such as fluid control valve and hermetic connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Industrial application field] The present invention relates to an existing fluid pipe, for example, a water pipe, in a state of uninterrupted water supply (in a flowing state without stopping the flow of flowing water in the existing pipe by a previously installed water control valve). In particular, the present invention relates to a method of installing a fluid control valve in which a fluid control valve is installed in a sealed housing. The present invention relates to a method for installing a valve and a construction device therefor.

[Conventional technology]

Japanese Patent Publication No. Sho 59-42193 discloses a technique of this type.

That is, according to the known technique, a pair of split wheels are slidable on a pipe circumferential 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 wheels. After enclosing the location in a sealed housing and cutting the installation location of the fluid control valve in the housing with a cutting machine, attach the fluid control valve to the cut portion in a state that restricts movement in the pipe axis direction. Then, split split wheels located on both sides thereof are pushed in from both sides toward the fluid control valve from the outside, and the fluid control valve is straddled between the connection flange portion and the pipe end of the cutout portion. After connecting these two pipes, the fluid control valve is attached in the middle of the pipe by removing the outer casing.

However, according to the known technique, the cut end face of the cut fluid pipe is exposed, and is constantly in contact with the fluid in the fluid pipe. There is a problem with progress.

[Problems to be solved by the invention]

The present invention has been made in view of the above-mentioned circumstances, and an object (technical problem) of the present invention is to provide a novel construction method in which rust does not occur on a cut portion in a non-water-proof installation method of this type of fluid control valve. I do.

B. Configuration of the Invention [Means for Solving the Problems] In order to achieve the above object, the method for installing uninterrupted water in a fluid control valve of the present invention employs a configuration (technical means) comprising the following steps. That is, in the sealed case, in the method of cutting off the fluid pipe into a straight tube by a cutting machine, and then inserting the fluid control valve into the cut portion, the fluid control valve is installed continuously without water.
A step of previously mounting fixed connection rings on pipe peripheral surfaces corresponding to both sides of the installation location of the fluid control valve, and after cutting the fluid pipe with a cutting machine, apply a cut end to the cut end face on the fixed connection ring side. A step of inserting a fluid control valve in which an expandable and contractible joint ring holding a sealing material to be in contact with is attached in a contracted state, and extending the movable joint ring in a ring axis direction to watertightly engage the fixed connection ring. A non-stop water installation method for the fluid control valve.

Further, the sealed connection device implements the above-described method of setting up the fluid control valve without interruption, and a fixed connection ring that is fixedly attached to the pipe peripheral surface on both sides of the insertion installation location of the fluid control valve, In the fluid control valve to be inserted and installed, a telescopic joint ring that is mounted corresponding to the fixed connection ring and that can expand and contract in the pipe axis direction, holding a seal material that is in contact with a cut portion of the fluid pipe,
A hermetically-sealed connection device comprising:

[Action]

In the movement of the telescopic joint ring in the axial direction, the packing is pressed against the cut surface of the fluid pipe, and the fixed connecting ring and the telescopic joint ring are engaged with each other in a watertight manner, whereby the outflow of the fluid in the fluid pipe is prevented. Sealed.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method for installing uninterrupted water of a fluid control valve and a hermetically-sealed connection device of the present invention will be described with reference to the drawings.

(Embodiment) FIGS. 1 and 2 show an intermediate step (a state immediately after insertion of a fluid valve) of the method of the present invention, and the whole of a hermetic connection apparatus of the embodiment is shown. .

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

(Working Sealed Case) First, the working sealed case S will be described.

The working closed case S is formed in two parts in a plane including the tube axis of the upper case 100 and the lower case 101, and their flanges 102 and 103 are brought into contact with each other to be integrally assembled with the fastening bolts 104. At both ends in the tube axis direction,
An insertion hole 106 through which the fluid pipe P is inserted is opened, a metal plate 107 is fixed to the inner surface of the main sealed case S facing the insertion hole 106, and a packing is provided in a gap between the insertion hole 106 and the fluid pipe P. 108 is installed. Reference numeral 109 denotes a pressing ring for pressing the packing 108. The pressing ring 109 is advanced by a tightening bolt 110 screwed into the main sealed case S.

Further, the push ring 109 is provided with a detachment prevention device 111 for preventing the detachment of the bolt by cutting into the fluid pipe P.

Although the closed case S has a substantially horizontal cylindrical shape, the upper portion forms a rectangular opening 113, and a flange 114 on the upper end surface is used to connect other devices described later. A guide rail 115 is provided vertically on the inner surface of the closed case S so as to face the opening 113. 116 is a work window that can be opened and closed.

A drain pipe 118 is disposed on the lower bottom of the closed case S, and a pointing leg 119 supporting the entire case S is provided on the bottom.
Is provided.

(Sealed Connection Device) The sealed connection device of the present embodiment is mounted on the fluid pipe P side and the inserted fluid control valve V side in the working sealed case S. Connection part.

That is, the sealed connection device includes a fixed connection ring 1 disposed on the left and right sides of the fluid pipe P with the fluid valve V interposed therebetween, and an outer ring disposed corresponding to the fixed connection ring 1 on the fluid control valve V side. It includes a movable joint ring 2 composed of an inner ring 3 and an inner ring 4 as a main configuration.

The sealing connection device includes an auxiliary ring 6, a sliding guide 7 and a pulling device 8 as auxiliary components, and is used for mounting operation of the sealing connection device.

Hereinafter, the detailed structure of each part of the sealed connection device will be described.

In the following description, the front part and the rear part are fluid valves V
Is defined as a front portion, and a side away from the fluid valve is defined as a rear portion.

FIG. 4 shows the sealed connection device taken out.

The fixed connecting ring 1 is made of a split body, is mounted in a watertight manner with a packing 10 around the pipe P, and has an annular horizontal flange 11 protruding in the horizontal direction at the front part and a flange part protruding outward in the pipe radial direction. With 12. In the rear part, an outwardly protruding flange portion 13 is provided, and inwardly, a rubber ring housing recess 14 is provided.
The rubber ring 15 is accommodated in the rubber ring accommodating recess 14 and is pressed by the pressing ring 17 which engages with the flange portion 13 via the tightening bolt 16.

The telescopic joint ring 2 has a telescopic function by a combination of an outer ring 3 and an inner ring 4 which are one-piece tubular bodies.

More specifically, a fixed connecting ring 1 is provided at the rear of the outer ring 3.
A flange portion 19 abutting against the flange portion 12 and a right-angle recess 20 bent at a right angle so as to receive the horizontal collar 11 are formed so as to correspond to the front shape of FIG.

The flange portions 12 and 19 are fastened to each other by a fastening bolt 21 inserted into a bolt insertion hole opened at a corresponding position. Thus, the vertical wall surface 20a of the right-angled recess 20
Is extended until its inner end reaches at least the inner diameter of the fluid pipe P. That is, the right-angled recess 20 may protrude from the inner surface of the fluid pipe P, but disadvantageously increases the fluid resistance. Then, the sealing material 22 is fixedly mounted on the vertical wall surface 20a.
The sealing material 22 forms an annular plate having a predetermined thickness. Also, right angle recess
An annular groove is formed in the circumferential wall 20b of the
3 is fitted. The packing 23 comes into contact with the horizontal flange 11 of the fixed connecting ring 1 and performs a watertight action.

At the front of the outer ring 3, a flange 25 is stretched outward.
Horizontal screw holes 26 are formed in the flange portion 25 at predetermined intervals in the cylindrical direction in parallel with the pipe axis. The horizontal screw hole 26
, An extrusion screw 27 is screwed.

An annular protruding body 29 having a required width protrudes from the inside of the front end of the outer ring 3, and a packing groove is formed in the inner peripheral surface thereof. A packing 30 is mounted in the packing groove.

The inner ring 4 is overlapped and arranged within the inner diameter of the body of the outer ring 3, and a screw hole is formed at a rear end thereof at a predetermined interval in a circumferential direction, and a lock screw 32 screwed into the screw hole is formed on the outside. It abuts against the ring 29 of the ring 3 and prevents the inner and outer rings 3, 4 from coming off from each other.

At the front of the inner ring 4, a flange portion 34 is stretched outward,
It is fixed to the fluid valve V with the mounting bolt 35. The flange 34 also serves as an abutment for an extrusion screw 27 screwed into the flange 25 of the outer ring 3.

In the sealed connection device of the present embodiment having the above configuration, a flange portion is provided because of the connection with the slide guide 7 described later.
12, 19 have the same diameter.

Returning to FIGS. 1 and 2 again, the interposition ring 6, the slide guide 7, the pulling tool 8, and other members will be described.

(Intermediate ring 6) The intermediate ring 6 is at least divided into two parts, and is abutted and interposed between the backing plate 107 of the closed case S and the flange portion 13 of the fixed connection ring 1 of the fully-sealed connection device. The front end of the fixed connection ring 1, that is, the front end of the horizontal flange 11 faces the cutting portion.

(Sliding Guide 7) The sliding guide 7 has a function of supporting the sealed connection device including the fluid valve V below, and guiding the sealed connection device when it moves in the pipe axis direction.

More specifically, a guide box 40 is disposed at the center of the bottom of the sealed case S, while a base 41 is provided with a base 42 that is vertically movably fitted along the inner wall of the guide box 40. It consists of a flat plate 43 on the base 42. The guide box 40 and the base 42 are linked by a screw rod 45, and a key groove is vertically provided on a side surface of the base 42, and a key 46 fixed to the sealed case S side is fitted into the key groove. Thus, the base 42 moves up and down without rotating together with the rotation of the screw rod 45. The guide pipes 48 are arranged side by side on the flat plate 43 of the base 41. Thus, the outer end surfaces of the lower portions of the flange portions 12 and 19 of the fixed connection ring 1 and the movable joint ring 2 constituting the sealed connection device are brought into contact with the guide pipe 48.

(Drawing Tool 8) The drawing tool 8 is provided on both axial side surfaces of the sealed case S, and has a function of drawing the movable joint ring 2 by an operation from outside the sealed case S.

More specifically, a circular hole 50 is opened on the side surface of the sealed case S, and a guide cylinder 52 is fixed to the outside of the case S so as to face the circular hole 50, and a moving shaft 53 of the case S is provided in the guide cylinder 52. It extends to the inside and is arranged. The guide cylinder 52 and the moving shaft 53 are interlocked by a screw rod 54, and the moving shaft 53 moves back and forth by the rotation of the screw rod 54. An engaging element 55 is attached to the distal end of the moving shaft 53, and the rear end face 55a is engaged with the flange 19 of the telescopic connecting ring 2.

A U-shaped groove 57 is formed in the guide cylinder 52, and an operation lever 58 having a base fixed to the moving shaft 53 is inserted into the groove 57 in a protruding manner. The groove 57 is composed of portions 57a, 57b, 57c, for example, when the operating lever 58 is in the portion 57a, the engaging element 55 is in the non-engaging element state, is inverted at the part 57b, and is engaged at the part 57c. (See FIG. 3).

(Fluid Valve V) The fluid valve V of this embodiment is a so-called butterfly valve, and the valve element 130 housed in the valve box opens and closes by rotating the valve rod 132. The figure shows the open state.

The expansion joint ring 2 of the present sealing connection device is directly fixed to the valve box of the fluid valve.

The valve stem 132 is connected via a flange 133 at the upper end thereof via a connecting body 136 attached to the lower end of an elevating shaft 135 of a charging device described later.

Further, a horizontal beam member 138 is stretched from the side of the fluid valve V,
Both ends of the cross beam member 138 are slidably engaged with the guide rail 115 of the closed case S described above.

(Method of Embodiment) A method of installing a fluid control valve without interruption using the above-described sealed connection device of the present embodiment will be described with reference to FIGS. FIG. 1 and FIG. 2 show the construction in progress, and FIG. 4 shows the finished state.

(1) First, as shown in FIG. 5, the ground E at the position where the fluid control valve of the fluid pipe P is disposed is excavated to secure a work space F.
At this time, it is preferable that the ground at the bottom of the excavation hole is ground-treated so as to have a sufficient ground strength.

After the cutting machine H is attached to the water distribution main pipe P at the position where the fluid control valve is installed, the fixed connection rings 1 of the main sealing connection device are attached to the outside thereof.

In the figure, reference numeral 200 denotes a drive shaft of the cutting machine H, and reference numeral 202 denotes a joint at the upper end thereof.

(2) Attach the lower case 101 around the fluid pipe P via the legs 119 (see FIG. 6). In addition, the interposition ring 6 is installed between the backing 107 of the case S and the rear end of the fixed connection ring 1, and the slide guide 7 is also installed by adjusting the level of the guide pipe 48.

Next, cover the upper case 102 of the working closed case S,
The closed working case S is assembled integrally. At this time, the openings at both ends of the sealed case S are
To make the detachment prevention fitting 111 effective in a watertight manner. Thereafter, the blind lid I is put on, and a water pressure test is performed in this state (see FIG. 7).

(3) If it can be confirmed that the watertight state is maintained,
The blind lid I is removed, and the working water control valve J and the connecting cylinder K are mounted on the working case S through the flange 114 in a watertight manner. The connecting tube K is provided with a working window. In addition,
At this time, the working water control valve J is in the open state (the eighth water control valve).
See figure).

(4) Thereafter, the driving device L of the cutting machine H is attached (see FIG. 9).

FIG. 10 shows a driving shaft 204 of the driving device L in the closed case S.
And a connection state between 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 lower part of the working water control valve J via the working window of the connecting cylinder K.

The pulling tool 8 has the operation lever 58 in the guide groove 57a and is in a non-engaged state.

In this state, the cutting machine H is driven to cut the fluid pipe P. The cutting mechanism of the cutting machine H is a known one, and the rotation of the drive shaft 200 is distributed in two directions by a bevel gear mechanism, and further, a cutting tool is attached to the outer peripheral surface of the fluid pipe P via a gear mechanism and a chain mechanism. The fluid pipe P is rotated around the fluid pipe P so that the fluid pipe P is cut into a straight pipe.

With this cutting, the fluid in the fluid pipe P fills the working closed case S, the working water control valve J, and the connection tube K, but works without interruption without overflowing to the outside. In addition, the chips are discharged together with the discharge from the drain pipe 118 at the lower bottom of the closed case S.

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

Then, when the cutting machine H passes through the working water control valve J, the working water control valve J is closed, and then the cutting machine H and its driving device L are removed (see FIG. 11).

(6) Next, the fluid valve insertion device M equipped with the fluid valve V
Is mounted on the connecting tube K (FIG. 12). At this time, the joint ring 2 is attached to the fluid valve V in a contracted state, the extrusion screw 27 is not attached, and the elevating shaft 135 is in a contracted state. The fluid valve V is housed in the connection tube K in a watertight manner.

Thereafter, the working water control valve J is opened, and the charging device M is driven to push the fluid valve V into the working sealed case S.

At this time, the fluid valve V is lowered along the guide rail 115 in the working sealed case S, so that the fluid valve V can be easily inserted into the cut portion.

(7) By operating the pulling tool 8, the expansion joint ring 2 is connected to the connecting ring 1.
In the direction of.

 FIG. 13 shows the initial state.

After the pulling tool 8 is moved forward and then turned over,
The engaging element 55 is engaged with the flange 19 of the expansion joint ring 2.

In this state, the screw rod 55 of the pulling tool 8 is further rotated,
The moving shaft 53 is pulled back.

 FIG. 14 shows a state in which the drawing has been completed.

As shown in the figure, the outer ring 3 of the expansion joint ring 2 is fitted over the cut portion in a watertight manner to the fixed connection ring 1, and the sealing material 22 attached to the outer ring 3 is pressed against the cut surface Q. Have been. As a result, the flowing water in the fluid pipe P is completely stopped.

(8) The running water in the working closed case S is drained through the drain pipe 118, and as shown in FIG.
The outer screw 3 of the expandable joint ring 2 is further pushed by rotating the extrusion screw 27 in the inside, and the sealing material 22 is strongly pressed against the cut surface Q.

Thereafter, the working sealing case S, the working water control valve J, the connecting tube K, and the like are removed, and in the sealed connecting device, the packing 15 and the pressing ring 17 are attached to the rear portion of the fixed connecting ring 1 to maintain water tightness. .

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

(9) As shown in FIG.
And a base O is provided below the fluid valve V as necessary.

Thereafter, predetermined valve room processing is performed, and the ground E is backfilled.

As described above, according to the method of the present embodiment, when the fluid valve V is inserted into the cut portion, the sliding guide 7 provided at the bottom of the working sealed case S and the flanges 12, 1 of the sealed connection device are provided.
The sliding action with the shaft 9 guides the movement in the axial direction, and the insertion and installation work is performed smoothly and easily.

Further, the cut surface Q of the cut portion is hermetically sealed by the sealing material 22, and rusting from the cut surface Q is prevented.

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

In the hermetically-sealed connection device, it is essential that the expansion and contraction joint ring 2 is freely expandable and contractable, and the sealing member 22 is held. The other configuration is not limited to the configuration of the embodiment and can be changed as appropriate.

That is, the fixed connection ring 1 may be 30% or more, and the watertightness of the rear portion thereof may be achieved by welding with a fluid pipe. The fixing of the expansion joint ring 2 to the fluid valve V at the front part can be performed by appropriate means such as welding. The seal between the fixed connection ring 1 and the expansion joint ring 2 is provided outside the packing 23 by the flange portion 12.
The gasket or packing interposed between the flange portion 19 and the gasket can be used.

FIG. 17 shows another fitting mode of the fixed connection ring 1 and the expansion joint ring 2.

As shown, the horizontal flange is omitted in the fixed connection ring 1, a concave portion 70 is formed instead, and the horizontal flange 71 projecting rearward from the flange portion 19 in the telescopic joint ring 2.
Is provided. The flange 19 of the joint ring 2 is the fixed connection ring 1
When abutting against the flange portion 12, the horizontal flange 71 enters the concave portion 70 to maintain watertightness by the packing 72, and further,
The sealing material 22 attached to the right-angled concave portion 20 of the joint ring 3 abuts on the cut surface Q of the fluid pipe P to seal the cut surface Q.

The method / apparatus of the present invention is not limited to the installation of the fluid control valve, but can be applied to other uses, for example, the installation of a flow meter. In short, it is sufficient to mount the telescopic joint ring 2 on the object.

C. Effects of the Invention According to the present invention, the following specific effects are obtained.

The cut surface of the fluid pipe cut into a straight tube is hermetically sealed by a seal member gripped by the present hermetic connection device, so that rust from the cut surface can be reliably prevented.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a method for installing uninterrupted water, such as a fluid control valve, of the present invention and a hermetically-sealed connecting device thereof. FIG. Partial sectional side view, FIG. 3 (a) is an X-ray view of FIG. 1, (b)
4 (a) is an enlarged view of a main part of the apparatus of the present invention, FIG. 4 (b) is an enlarged view of a portion A in FIG. 4 (a), and FIG. FIG. 6 is a process diagram following FIG. 6, FIG. 6 is a process diagram following FIG. 6, FIG. 8 is a process diagram following FIG. 7, and FIG. FIG. 10 is an internal part in a cut state, FIG. 11 is a drawing diagram of a cutting machine and a pulling-up process of a cut piece, FIG. 12 is a drawing diagram of an insertion process of a fluid valve, FIG. FIG. 14 is an intermediate process diagram of the connection operation of the fluid valve, FIG. 15 is a completion process diagram of the connection operation of the fluid valve, FIG.
FIG. 16 is a view showing the completion of the installation of the fluid valve, and FIG. 17 is a view showing another state of contact between the connecting ring and the joint ring. P: fluid pipe, Q: cut face, S: working sealed case, V: fluid valve, 1 ... fixed connection ring, 2 ... telescopic joint ring, 22 ... sealing member

Claims (3)

(57) [Claims] In a method for installing a fluid control valve in a closed case, a fluid pipe is cut into a straight tube by a cutting machine and then a fluid control valve is inserted into the cut portion. A step of mounting a fixed connection ring on each of the pipe peripheral surfaces corresponding to both sides of the location.After cutting the fluid pipe with a cutting machine, a sealing material to be brought into contact with the cut end face of the fixed connection ring on the cut portion thereof. A step of inserting a fluid control valve in which a telescopic joint ring held in a contracted state is held, and a step of extending the movable joint ring in a pipe axis direction to engage with the fixed connection ring in a watertight manner. How to install the fluid control valve without interruption. 2. The method of claim 1, wherein a flow meter is installed instead of the fluid control valve. 3. A fixed connection ring which is fixedly mounted on the peripheral surface of the pipe on both sides of a place where the fluid control valve is inserted, and a fluid control valve which is inserted and installed, corresponding to the fixed connection ring, A sealing connection device, comprising: an expansion / contraction joint ring that can expand and contract in the axial direction of the tube, holding a sealing material that is in contact with a cut portion of the fluid tube.