JPH023797A - No-water interruption mounting control valve, sealed cutter device and no-water interruption mounting method for control valve - Google Patents

Abstract

PURPOSE:To enable a control valve to be easily further adequately mounted to a pipe duct with water not interrupted by providing an auxiliary pipe of diameter equal to the pipe duct respectively in right and left pipe ends of a valve casing and slidably fitting a connecting pipe to this auxiliary pipe previously over the total length. CONSTITUTION:A no-water interruption mounting control valve provides in its valve casing 2 a valve unit opening and closing a fluid passage, and an auxiliary pipe 3 is respectively connected to right and left pipe ends of the valve casing 2, while a connecting pipe 4 is fitted to the periphery of the auxiliary pipe 3 slidably in its axial direction over the total length. The connecting pipe 4 is moved along the auxiliary pipe 3, and the pipe 4 is provided astride between the auxiliary pipe 3 and a pipe duct 5, liquid-tightly connecting the auxiliary pipe 3 to the pipe duct 5.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a method for controlling the supply of liquid or gas without stopping the supply of liquid or gas (hereinafter referred to as
control valves that can be installed in pipelines (referred to as uninterrupted water);
The present invention also relates to a sealing disconnection device for use in installing a control valve in a pipeline without water interruption, and a method for installing a control valve without water interruption in the pipeline.

[Conventional technology]

Conventionally, as a method for installing a control valve on a W path without water interruption,
To install the control valve, a pair of connecting pipes with a bifurcated structure are slidably fitted into the piping portions corresponding to both sides of the location, and then the above control valve including these connecting pipes is installed by sealing the location with a sealed casing. The control valve is surrounded by a liquid-tight casing, and a cutter is attached to the place where the control valve can be installed within the sealed casing. Then, the two separate connecting pipes located on both sides are pushed in from both sides toward the control valve by external operation, and are inserted between the connecting flange of the control valve and the pipe end of the cut section. It is known to connect them by fitting them over each other (Japanese Patent Publication No. 59-42193).

[Problem to be solved by the invention]

However, the conventional water-interruption installation method described above has the following problems.

(1) Since the connecting pipe is directly attached to the pipeline, it is necessary to have a separate structure, which not only complicates the structure, but also takes time to attach to the pipeline, and it is difficult to obtain good liquid tightness. .

(2) Since the control valve is installed by attaching a cutting machine to the location and cutting out the part, the cutting machine must be removed from the location where the control valve is installed after the pipe line has been cut. ,
This method is time-consuming and labor-intensive, and it is extremely difficult to accurately cut the pipe.

(3) In addition, as mentioned above, the cutting machine is moved within the sealed casing to the position where the pipe is cut, and after the pipe is cut, it is evacuated to another part, which makes the overall structure of the device complicated. , operation becomes difficult and costs increase.

An object of the present invention is to provide a control valve that can be easily and accurately attached to a pipeline without water interruption. It is an object of the present invention to provide a sealed disconnection device capable of providing a water-tight connection, and also to provide a method for water-tight installation of a control valve, which allows the control valve to be conveniently installed in a pipeline without water cut-off.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a control valve with an uninterrupted water supply system, in which a valve body for opening and closing a fluid passage is provided in a valve box, and pipes are connected to the left and right pipe ends of the valve box. An auxiliary pipe with the same diameter as the channel is provided, and on the outer periphery of the auxiliary pipe,
A connecting pipe that is moved in the axial direction of the auxiliary pipe along the auxiliary pipe, is placed astride between the auxiliary pipe and the pipe line, and connects the auxiliary pipe and the pipe line in a liquid-tight manner is fitted over the entire length.

In addition, in the sealed cutting device of the present invention, the pipe line is inserted into the through hole, and the control valve is attached to the pipe line through the insertion hole portion inside the sealed casing that liquid-tightly covers the part. A pair of left and right cutting machines were used to cut the pipe line, and a gap was provided between them for attaching a control valve to the pipe line.

Furthermore, in the method for installing the control valve without water interruption in the present invention, the pipe line is inserted into the insertion hole provided in the sealed casing, and the control valve installation part of the pipe line is covered liquid-tightly, and a cutting machine is used inside the sealed casing. At the same time, cut out the pipe line with The connecting tube was moved along the auxiliary tube in the axial direction of the auxiliary tube to straddle the auxiliary tube and the conduit in a liquid-tight manner.

[Effect]

To install the control valve without water interruption, fit the connecting pipe in advance to the outer periphery of the auxiliary pipe with the same diameter as the pipe line, which is installed at the left and right ends of the valve box, so that it can slide freely in the axial direction of the auxiliary pipe. The pipe is formed into a sealed casing and installed at the cut point of the pipe line cut by a cutting machine. Then, the connecting tube is moved along the auxiliary tube to straddle the auxiliary tube and the conduit, thereby connecting the auxiliary tube and the conduit in a liquid-tight manner. Since the connecting pipe is configured to fit into the hIi auxiliary pipe in advance and then move toward the conduit and fit into the conduit, the connecting pipe does not necessarily have to have a split structure. In addition, the connecting pipe can be quickly and conveniently fitted to the auxiliary pipe of the control valve in a well-equipped factory, etc., and the predetermined M degree is maintained, so the connecting pipe cannot be moved. It is also easy to connect the auxiliary pipe and the conduit ml in a liquid-tight manner by straddling the auxiliary pipe and the conduit ml.

The sealed cutting device inserts the conduit into the insertion hole, and also
To install the control valve, cover the part in a liquid-tight manner and attach a sealed casing to the pipeline. Once the sealed casing is attached to the pipeline in this way, the control valve is installed by leaving a gap and operating a pair of left and right cutting machines installed inside the sealed casing to cut the pipeline inserted into the insertion hole. . After that, the control valve is attached to the above-mentioned cut point of the pipe, but as mentioned above, the control valve is installed between the pair of left and right cutting machines at the front, so the control valve for the pipe is There is no need to evacuate the entire cutting machine from the cutting site when installing the cutting machine. Further, since the cutting machine is fixedly provided in the insertion hole inside the sealed casing, the pipe can be cut accurately and quickly.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 is a control valve that is permanently installed, and the valve box 2
A valve body (not shown) for opening and closing a fluid passage is provided therein as is well known, and an auxiliary pipe 3 is connected to the left and right pipe ends of the valve box 2, respectively, and is connected to the outer periphery of the auxiliary pipe 3. tube 4
is fitted over the entire length of the auxiliary tube 3 so as to be slidable in the axial direction (in the left-right direction in FIGS. 3 and 7). The auxiliary pipe 3 connects the fitting flange 3a to the joining flange 2a of the valve box 2 with bolts 1.
1 (FIG. 7) and is integrally connected to the valve box 2, and its outer diameter is the same as the outer diameter of the conduit 5 to which the control valve 1 is attached. The connecting pipe 4 is moved along the auxiliary pipe 3 and is provided across the auxiliary pipe 3 and the conduit 5, and connects the auxiliary pipe 3 and the conduit 5 in a liquid-tight (air-tight) manner. The end of the hole is a tapered hole 4ah, and a moving flange 4b is provided at the end on the side of the valve box 2, and a seal ring 6 is provided on each of the two left and right inner periphery WITs 4c. Above 7+1? The joint flange 3a of the auxiliary pipe 3 has
A plurality (six in the figure) of the same threaded pipes 8 having the same sprocket wheel 7 are pivotally supported at predetermined intervals in the circumferential direction of the joint flange 3a, and are attached to the moving flange 4b of the connecting pipe 4. , the same number of threaded rods 9 as the threaded pipes 8 are screwed into each threaded pipe 8 and fixed thereto.

Therefore, in this configuration, each sprocket wheel 7
When rotated by an endless chain 10 (Fig. 1) wrapped around their outer circumferences, each threaded pipe 8
rotates and moves the threaded rod 9 in the axial direction, so the connecting tube 4 slides along the auxiliary tube 3 in the axial direction of the auxiliary tube 3.

Reference numeral 13 is a sealed casing. This sealed casing 13 includes a lower body 14 and a lower body 1 on top of this lower body 14.
Intermediate body 1 which is liquid-tightly attached by joining joint flange 15a to joint flange 14a of No. 4 with bolts (not shown).
5, an upper body 16 which is fluid-tightly attached by bolting the joint flange 16a to the joint flange 15b of the intermediate body I5 on the intermediate body 15, and the joint flange of the upper body 16 on the upper body 16. 16b and a lid body 17 which is fluid-tightly attached by joining a joint flange 17a with bolts. The control valve l is inserted into the pipe line 5 and attached to the pipe line 5 so as to cover the part A in a fluid-tight manner. The insertion hole S is formed by a half-split cap 18 attached to the lower body 14 and the intermediate body 15, respectively.
A half-shaped presser 20 is attached with bolts (not shown) to make the space between the two parts liquid-tight.

A pair of left and right cutting machines 21 are provided inside the insertion hole S of the sealed casing 13.

The cutting machine 21 is for cutting the pipe line 5, and has a base 18 on the inner surface of the lower body 14 of the sealed casing 13 and the intermediate body 15.
A cylindrical support member 22 fixed with a bolt 24 (fourth) around the center line of , and a guide i1 of this cylindrical support member 22.
The cylindrical support member 22 is assembled by fitting the protrusion 23a into 422a.
A rotating member 23 rotatably attached to the rotary member 23, a summer boulder 25 fixed to the inner side of the rotating member 23 at predetermined intervals in the circumferential direction of the rotating member 23, and a feeder pivotally supported on the boulder 25. A screw 26, a feed piece 27 screwed onto the feed screw 26, a cutting blade 29 attached to the feed piece 27 with a bolt 28, a sprocket wheel 30 attached to the rotating member 23, and this sprocket wheel. 30 relative to the simple support member 22 via the chain 3I (FIG. 3) and the sprocket wheel 32, and a hydraulic motor or electric motor that rotates the cutting blade 29 together with the rotating member 23 to cut the pipe 5. Cutting drive device 3 such as
3 is the main focus.

The cylindrical support member 22, the rotating member 23, and the sprocket wheel 30 are made of half-split structure, and the feed screw 2
6, during the rotation operation of the rotating member 23, the feed claw 34 protrudingly provided on the inner surface of the intermediate body 15 engages in an rRnfi manner;
Turn the feed screw 26 to remove the cutting blade 29 together with the feed piece 27.
A gear 35 is attached to move the tube toward the center of the conduit 5.

Further, the feed screw 36 is arranged so that the tips of the five pipe lines are placed inside,
In other words, a control valve! A gear 35 is also mounted on the side, with the cut head disposed on the mouthpiece 18 side and pivotally supported by the holder 25 in an inclined state, so that the cutting blade 29 is moved diagonally forward and backward together with the feed piece 27. has been done.

G (FIG. 3) is a gap formed between a pair of cutting machines 21, in which the control valve 1 is attached.

A pair of rails 37 are laid at the inner bottom of the lower body 14 of the sealed casing 13, extending at right angles below the conduit 5 inserted into the insertion hole S, and on the rails 37, a cart 38 is mounted. It is mounted so that it can be moved freely. The trolley 38 is the conduit for the control valve I! It is intended to be inserted into the resection area of
The screw shaft 40 is pushed by a female screw member (not shown) of a transfer device 39 provided outside the sealed casing 13 to approach the conduit 5.

The sealed casing I3 also includes a moving drive device 41 (
(Fig. 2) is provided. This drive device 4! Ha, Mi
The connecting tube 4 is moved along the auxiliary tube 3 by rotating the screw vibrator 8 which is pivotally supported on the auxiliary tube 3 joint flange 3a, and the rotation of the rotation shaft 42 is controlled by the sprocket attached to the auxiliary tube 3. The configuration is such that the signal is transmitted via a wheel 43, an endless chain 44, and a sprocket wheel 45 to one threaded pipe 8 to which the sprocket wheel 45 is attached. An arm 46 is swingably attached to the rotating shaft 42, and a sprocket wheel 47 for tensioning the chain 44 is attached to the arm 46 so as to be adjustable.

Furthermore, a removal drive device 49 is attached to the lid 17 of the sealed casing 13.

This removal drive device 49 removes the pipe piece 5a cut by the Moeki cutting machine 21 upward from the cut point by raising a lifting member 50 made of a screw structure, and is controlled by the trolley 38. The installation of valve 1 makes it possible to transport it to location A. Reference numeral 51 denotes a half-split coupling fitting that connects the conduit piece 5a to the lower end of the suspension 1III50, and has supporting legs 52.

Note that the cutting drive device 33, the transfer device 39, the movement drive device 41, and the removal drive device 49 are attached to the sealed casing 13 in a liquid-tight manner.

Next, a method of attaching the control valve 1 constructed as described above to the pipe line 5 using the sealed casing 13, the cutting machine 21, etc. will be explained.

If the pipe 5 is buried underground, excavate the area around the pipe 5 where the control valve is planned to be installed and expose that area.Then, the sealed casing 13 is assembled and the pipe 5 is buried. To install the control valve 1, surround the location Δ in a fluid-tight manner.At this time, insert the insertion hole S1. and the conduit 5 to be liquid-tight.Furthermore, as the assembly of the sealed casing 13 progresses, the following preparation work is performed as needed.

(1) Assemble the cutting machine 21 so that the pipe line 5 can be cut.

(2) Place the cart 38 on the rail 37.

(3) Assemble the control valve 1 at a factory, etc. When assembling the control valve 1, connect the connecting pipe 4 over its entire length as shown in FIG. i17 assistant w3, and the chain 10 is wrapped around the outer periphery of each sprocket wheel 7.

(4) Control valve! is placed on the trolley 38.

(5) attaching the moving device 39 to the sealed casing 13;
To enable a truck 38 to move along a rail 37 without moving.

(6) When the moving drive device 41 is attached to the sealed casing 13, the chain 44 is wound around the sprocket wheels 43, 45HJ, so that the threaded pipe 8 can be rotated by the operation of the moving drive device 41. . At this time, care must be taken to ensure that the chain 44 is appropriately tensioned when the control valve 1 has been inserted into the mounting location A.

(7) Attach the coupling fitting 51 to the inside of the cut point of the pipe line 5 and support it with support #52.

(8) The removal drive device 49 is attached to the sealed casing 13, and the lifting shaft 50 is connected to the coupling fitting 51, so that the removal drive device 49 can remove the conduit piece 5a upward.

Note that the order of the above preparation work is not limited to the above and may be different.

After completing the preparation work and completely sealing the installation location A of the control valve I with the sealed casing 13, the rotary fR material 23 is rotated relative to the cylindrical support member 22 without activating the cutting drive device 33. The rotation of the rotating member 23 causes the gear 35 to move to the feed pawl 34.
When passing through the portion, it engages with the feed pawl 34 and rotates in the circumferential direction. For this reason, the feed screw 26 is connected to the gear 35! The cutting blade 29 moves toward the center of the conduit 5 together with the feed piece 27, bites into the conduit 5, and cuts it.

After the pipe line 5 has been cut in this way, the cutting drive device 33 rotates the rotary member 33 in the opposite direction.
9 is retreated toward the head of the feed screw 26. Note that when the pipe line 5 is cut by the cutting blade 29, fluid such as water flowing through the pipe line 5 flows out from the cut, but since the entire body is liquid-tightly covered by the sealed casing 13, it does not leak to the outside. There isn't.

Next, the removal drive device 49 is activated to raise the lifting shaft 50, and the pipe piece 5a connected to the lifting shaft 50 by the coupling fitting 5I is removed upward from the cutting position as shown by the two-dot chain line in FIG. do.

Next, the transfer device 39 is operated to move the cart 38 along the rail 37 using the screw M4.
The control valve 1 mounted on the valve 8 is inserted into the installation point A of the pipe line 5. Since there is a gap G between the pair of left and right cutting machines 21.21 for installing the control valve I, the control valve! There is no need to remove or move the cutting machine 21 when loading it into the location A. The same applies to the installation and removal of the pipe piece 5a from the location A.

After the control valve I has been inserted into the installation location A, the moving drive device 4I is activated. By the operation of the moving drive device 4I, all the screw vibrators 8 rotate in the same direction and at the same speed, and the screw rods 9 are moved outward (to the left in FIG. 7) in synchronization with each other. Therefore, the connecting pipe A slides along the auxiliary pipe 3,
The outer half is fitted into the conduit 5, and the auxiliary pipe 3 of the control valve 1 is connected to the conduit 5 in a liquid-tight manner. The tapered hole 4a that precedes the movement of the connecting tube 4 absorbs misalignment of the connecting tube 4 with respect to the conduit 5.

After the control valve 1 is connected to the conduit 5 in this manner, the sealed casing 13 is disassembled and the attachment is removed from the location A, and the cutting machine 21, moving drive device 41, etc. are removed from the sealed casing 13.

After that, connecting pipe 4? Koyoru Fl! I Wl valve 1? +
l? If it is necessary to connect the auxiliary pipe 3 and the pipe line 5 by M1, for example, as shown in FIG.
A is packed with a packing 53, and a presser 54 is attached to the flanges 4d and 4b of the connecting pipe 4 with bolts 55 to compress the packing 53. Note that the flange 4d is the third
As shown in the figure, the connecting pipe 4 may be configured as described above.

Other embodiments and technical matters other than those described above will be described below.

(r> In the above, the pipe line piece 5 cut by the cutting machine 2I
Although the control valve 1 is lifted upward by a lifting member 50 and removed from a certain location, the control valve 1 can also be removed laterally using a cart or the like, as shown in FIG. Note that in the drawings from FIG. 9 onwards, the same members are given the same reference numerals and their explanations will be omitted.

(H) Fig. 10 shows yet another example. In this case, when the pipe piece 5a is removed downward, the control valve 1 is lowered by a suitable lifting device and the installation is done at point A/here. Enter.

(nl) FIG. 11 shows another example. In this example, the pipe piece 5a is raised and horizontally divided by υF, and the control valve I is
Lower it in the same way as 6 in the figure and install it at point A.

(CVV) FIG. 12 shows yet another example, in which a turning member 56 is provided in the sealed casing I3, and the control valve 1 placed next to the pipe line 5 and the pipe piece 5a are connected by the turning member 56. At the same time, they are hoisted up and turned 180 degrees, and then lowered and the control valve 1 is inserted into the installation location A.

In addition, in FIGS. 9 to 12, the sealed casing 13, the charging mechanism of the control valve l, or the pipe piece 5a
It goes without saying that the exclusion mechanism and the like may be modified to achieve the purpose.

As can be understood from the above, the structure of the sealed casing 1, the direction of removal of the pipe line piece 5a, the removal mechanism IW, or the charging mechanism of the control valve (2) are arbitrary.

(V) Although the cutting 12+ of the embodiment shown in the figure is configured to cut the pipe line 5 by rotating the cutting blade 29, other types of cutting machines such as gas cutting machines and plasma cutting machines may be used. Alternatively, a cutting machine that cuts the material by jetting fluid at an ultra-high pressure from a nozzle can be used.

(■) As the control valve 1, a butterfly valve is usually used, but it is not limited to this.

(■) Although the auxiliary pipe 3 in the figure is flange-connected to the valve box 2, it may be formed integrally with the valve box.

(■) The connecting pipe 4 is normally a seamless one with a circular cross section, but a one of 2'lJ #lv construction can also be used.

(IX) As in Japanese Patent Publication No. 59-42193, a gate valve auxiliary case is detachably provided in the sealed casing 13, and necessary items such as the control valve 1 can be inserted into the sealed casing 13 as the work progresses, and It is also possible to take out the pieces 5a and the like.

(X) The removal drive device 49 and the transfer device 39 are not limited to a screw type, and may be, for example, a hydraulic cylinder type.

(XI) The present invention can also be applied when replacing an existing valve without water interruption.

〔Effect of the invention〕

Since the present invention is made by JR as described above, it has the following effects.

In the control valve for uninterrupted water installation according to claim 1, auxiliary pipes having the same diameter as the conduit are provided at the left and right pipe ends of the valve box, and a connecting pipe is slid onto the auxiliary pipe in the axial direction of the auxiliary pipe. Since it is pre-fitted over the entire length so that it can move freely,
There is no need to attach a half-split connecting pipe to a pipeline in a work site with extremely poor working conditions, and the control valve can be assembled in a well-equipped factory by accurately fitting the connecting pipe to the auxiliary pipe of the valve box. The control valve can be quickly installed by transporting it to the site. In addition, as mentioned above, in the past, the connecting pipe had to have a half-m1 structure, and the sealing material had to be wrapped in a ring shape, but in the present invention, There is no such restriction at all, and liquid tightness can be significantly improved by using a seamless connecting pipe with a circular cross section or a sealing material formed into an annular shape.

In the sealing device according to claim 2, the sealing device has a structure in which a pair of left and right cutting machines are provided in the insertion hole inside the sealing casing to cut the pipe line pushed through the insertion hole. Therefore, the pipe can be cut quickly and accurately without moving the cutting machine inside the sealed casing when cutting the pipe. Additionally, since there is a gap between the left and right pair of cutting machines before installing the control valve to the pipeline, it is necessary to evacuate the entire cutting machine when installing the control valve at the location. In addition, the cutting machine does not need to be evacuated even when removing the pipe segment cut by the cutting machine, so the work can be carried out efficiently in this respect as well.

Further, in the method for installing the control valve without water interruption according to claim 3, the control valve is installed in the sealed casing by inserting the pipe line into the insertion hole provided in the sealed casing, covering the part of the control valve in a liquid-tight manner, and installing the control valve in the sealed casing. The pipe is cut off using a cutter, and a control valve is inserted into the center of the pipe, where the connecting pipe is fitted over the entire length to the outer periphery of the auxiliary pipe provided at the pipe end of the valve box. The tubes are loaded with their centers aligned, and moved in the axial direction of the h17 auxiliary tube along the connecting tube to straddle the NU auxiliary tube and the pipeline in a liquid-tight manner, so the work environment can be maintained. There is no need to install a connecting pipe with a split structure, which makes it difficult to obtain good liquid tightness, on the surface of a pipe where rust has formed, and the control valve can be installed quickly.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, and FIG. 1 is a sectional view showing the relationship between the pipe line and the control valve etc. before the pipe line is cut;
Figure 2 (A) is a cross-sectional view showing how the pipe is cut by the cutting machine, Figure 2 (B) is a cross-sectional view showing the preparation state for moving the connecting pipe across, and the left half of Figure 3 shows the installation location. Figure 4 is a cross-sectional view of the cutting machine; The figure is a cross-sectional view of the (V-V) part in Figure 4.
FIG. 6 is a front view of the cutting machine, FIG. 7 is a sectional view showing the relationship between the auxiliary pipe and the connecting pipe, and FIG. 8 is a sectional view showing an example of reinforcing the connection of the connecting pipe to the duct and the auxiliary pipe. FIGS. 9 to 12 are explanatory diagrams of four other examples of the present invention. Pipe, 5... Conduit, 13... Sealed casing, 21.
...Cutting machine, A...Installation is in place, G...Installation is in gap, S...Through hole.

Claims (3)

[Claims] (1) In a control valve in which a valve body for opening and closing a fluid passage is provided in a valve box, an auxiliary pipe having the same diameter as the pipe line is provided at the left and right pipe ends of the valve box, and the outer periphery of the auxiliary pipe is , characterized in that a connecting pipe that is moved along the auxiliary pipe in the axial direction of the auxiliary pipe and is installed across the auxiliary pipe and the pipe line to connect the auxiliary pipe and the pipe line in a liquid-tight manner is fitted over the entire length. Control valve for uninterrupted water installation. (2) Cut the pipe line inserted into the insertion hole into the insertion hole part inside the sealed casing, which liquid-tightly covers the attachment point of the control valve for the pipe line by inserting the pipe line into the insertion hole. 1. A sealed cutting device for non-water-interruption installation of a control valve, characterized in that a pair of cutting machines are provided with a gap between them for installation of the control valve to a pipeline. (3) Insert the pipe line into the insertion hole provided in the sealed casing, cover the control valve installation part of the pipe line in a liquid-tight manner, cut off the pipe line with a cutting machine inside the sealed casing, and cut the pipe line at the cut point. , insert a control valve in which a connecting pipe is fitted over its entire length around the outer periphery of an auxiliary pipe provided at the pipe end of the valve box, with the center of the auxiliary pipe aligned with the center of the pipe line, and the connecting pipe is auxiliary. A method for installing a control valve without water interruption, characterized by moving the control valve in the axial direction of the auxiliary pipe along the pipe and installing the control valve in a liquid-tight manner between the auxiliary pipe and the conduit.