JP7321527B2 - Removal jig for fluid equipment - Google Patents

Description

The present invention provides a plurality of bolt fasteners that can be detachably attached to an existing fluid device having a split structure that seals and surrounds a branch opening formed in the pipe wall of the device installation region in the device installation region on the outer peripheral surface of the fluid pipe. In a fluid piping structure fixed with , it relates to a technique for removing the existing fluid equipment in an uninterrupted state.

As the above-mentioned existing fluid device, for example, there is a saddle-type faucet shown in Patent Document 1 and the like. This branch cock includes a saddle portion and a band portion that can be attached to a water pipe, which is a fluid pipe, from both sides in the pipe radial direction, and a branch cock body that incorporates an on-off valve. A branch plug main body is connected to the upper portion of the saddle portion. The flanges at both ends of the saddle portion in the pipe circumferential direction and the flanges at both ends of the band portion in the pipe circumferential direction are fastened with bolts and nuts of a plurality of bolt fasteners.

If water leakage occurs due to aged deterioration of the faucet, it is necessary to remove the existing faucet without interruption and replace it with a new faucet. Conventionally, when removing an existing water distribution valve, a plurality of bolt fasteners that fasten the flange of the saddle portion and the flange of the band portion are loosened, and the saddle portion and the band portion are separated from each other at the branch port of the water pipe. A removal method is adopted in which it is moved to one side in the direction of the pipe axis from the area where the faucet corresponding to is attached. (Unable to present appropriate patent documents.)

JP 2014-177973 A

In the conventional removal method, it is necessary to loosen multiple bolt fasteners that fasten the flange of the saddle and the flange of the band. There is a problem that a large amount of tap water flows out from the Moreover, even if a problem occurs during the loosening operation of the bolt fastener and the sealing operation is performed again, it cannot be dealt with quickly, and there is a problem that a large amount of tap water flows out during that time.
In particular, when a part of the anticorrosive core attached to the branch of the water pipe protrudes outward from the outer surface of the fluid pipe, the bolt and nut of the bolt fastener must be attached to the anticorrosive core. Since it is necessary to perform the loosening operation with a stroke that is equal to or greater than the projecting allowance of , the loosening operation takes time, and if the screwing allowance of the bolt and nut is small, there is a possibility that the screwing will be released unexpectedly.

In view of this situation, the main object of the present invention is to quickly and easily remove an existing fluid device that has problems such as leakage while suppressing the outflow of pressure fluid when removing it in an uninterrupted state. It is to provide a removal jig for a fluid device that can be removed.

In a first characteristic configuration of the present invention, an existing fluid device having a split structure sealingly surrounding a branch opening formed in the pipe wall of the device installation region can be detachably attached to the device installation region on the outer peripheral surface of the fluid pipe. In a fluid piping structure fixed with a plurality of bolt fasteners, a removal jig for fluid equipment for removing the existing fluid equipment in a non-interrupted state,
Among a plurality of existing divided housings constituting the existing fluidic device, an existing divided housing in a branch port side mounting area for sealing the branch port is attached to a jig body that can be attached to the existing fluidic device. The number of fasteners that can be tightened and fixed in a pressed state to the outer peripheral surface of the and is smaller than the number of bolt fasteners installed, and another existing divided housing located outside the branch port side mounting area or the outer surface of the fluid pipe and a reaction force receiving portion that abuts against and receives the tightening reaction force of the fastener.

According to the above configuration, when removing an existing fluid device with a problem such as leakage in an uninterrupted state, the reaction force receiving portion of the jig body is placed outside the branch port side installation area. It is brought into contact with the housing or the outer surface of the fluid tube. While the reaction force receiving portion receives the tightening reaction force of the fastener, the fastener is tightened. As a result, the existing divided housing in the branch-port-side attachment region that seals the branch port is press-fixed to the outer peripheral surface of the fluid pipe. In this pressed and fixed state, the bolt fasteners that fasten the plurality of existing split housings that constitute the existing fluid device are removed. After that, the tightening member of the jig body is loosened to the extent that the plurality of existing split housings constituting the existing fluid device can be moved along the outer peripheral surface of the fluid pipe. At this time, since the number of fasteners on the jig body is smaller than the number of bolt fasteners that fasten the plurality of existing divided housings that constitute the existing fluid equipment, the loosening operation can be performed quickly, and the fluid can be easily loosened. It is possible to reduce the outflow from the pipe branch. Moreover, even if a problem occurs during the loosening operation and the sealing operation is to be performed again, it can be quickly handled with a small number of fasteners.
Therefore, when removing an existing fluid device in which trouble such as leakage has occurred, it is possible to remove it quickly and easily while suppressing the outflow of the pressurized fluid.

A second characteristic configuration of the present invention is that only one clamping tool is provided in the central portion of the jig body.

According to the above configuration, only one tightening tool provided in the central part of the jig body in the pipe circumferential direction is operated, so the loosening operation time can be shortened and troubles can be dealt with during the loosening operation. Time can be shortened.

A third characteristic configuration of the present invention is configured such that a screwing stroke from the tightened state of the fastener to the unlocked side is larger than a screwing stroke from the tightened state of the bolt fastener to the unlocked side. at the point.

According to the above configuration, even if a part of the antirust core attached to the branch port of the water pipe protrudes outward from the outer surface of the fluid pipe, the fastener of the jig body can be prevented from The loosening operation can be performed reliably with a stroke longer than the protrusion of the rust core.

In a fourth characteristic configuration of the present invention, the reaction force receiving portion of the jig main body is fixedly connected to both flanges of the existing divided housing in the branch side mounting area by the bolt fastener. It abuts on the outer surfaces of the two flanges of the existing split housing, and each of the reaction force receiving portions is formed with an extraction port for the bolt of the bolt fastener.

According to the above configuration, since the reaction force receiving portion of the jig body is brought into contact with each of the outer surfaces of both flanges of the other existing divided housing located outside the branch port side mounting area, the tightening reaction force of the fastener is reduced. can be stably and reliably received. Moreover, after pressing and fixing the existing divided housing in the mounting area on the branch port side to the outer peripheral surface of the fluid pipe with the tightening tool of the jig body, the bolts that fasten the plurality of existing divided housings that constitute the existing fluid device. When removing the fastener, the unscrewed bolt can be easily pulled out through the pull-out opening formed in each of the reaction force receiving portions.

A fifth characteristic configuration of the present invention resides in that the distance between the two reaction force receiving portions of the jig body facing each other is larger than the outer diameter of the fluid pipe.

According to the above configuration, the jig body can be easily attached to and detached from the fluid pipe through the space between the opposite reaction force receiving portions of the jig body.

Front view (a) and side view (b) of fluid device removal jig Side view of fluid piping structure with existing branch cock Cross-sectional view when the removal jig is attached to the existing branch cock IV-IV line sectional view in FIG. Cross-sectional view when the tightening tool of the removal jig is tightened VI-VI line sectional view in FIG. Cross-sectional view when removing the bolt fastener of the existing branch stop Cross-sectional view when the tightening tool of the removal jig is loosened Side view when the existing branch stop and removal jig are moved Cross-sectional view when the new leak repair fitting and equipment mounting jig are installed Side view when the newly installed leakage repair fittings and equipment mounting jigs are installed Plan view (a), side view (b), front view (c) of equipment mounting jig

An embodiment of the present invention will be described based on the drawings.
[First Embodiment]
FIG. 2 shows an existing divided structure that surrounds a branch port 2 formed in the pipe wall of the device installation area 1A in a sealed state (watertight state) in the device installation area 1A on the outer surface of a fluid pipe 1 such as a water pipe. 1 shows a fluid piping structure to which a saddle-type existing branch cock 3, which is an example of fluid equipment, is attached. In this fluid piping structure, one of a plurality of types of existing saddle-type branch cocks 3 is used.

As shown in FIG. 2, the saddle-type existing branch cock 3 used in this embodiment includes a saddle portion 31 and a band portion 32 that can be attached to the fluid pipe 1 in a sandwiched state from above and below, and a ball valve (not shown). and a branch plug main body 33 containing the . The saddle part 31 is an example of one of the existing divided housings that constitute the existing branch cock 3 having a two-part structure, and is arranged in the branch port side mounting area of the upper part of the pipe wall of the fluid pipe 1 . The band part 32 is an example of the other existing divided housing that constitutes the existing branch cock 3 having a two-part structure, and is arranged outside the branch port side attachment area of the lower part of the pipe wall of the fluid pipe 1 . A branch plug main body 33 is connected to the upper portion of the saddle portion 31 .
The saddle portion 31 and the band portion 32 attached to the fluid pipe 1 are tightly fastened to the upper flanges 31A at both ends of the saddle portion 31 in the pipe circumferential direction and to the lower flanges 32A at both ends of the band portion 32 in the pipe circumferential direction. A bolt insertion hole 34 for the fastening bolt 4A of the bolt fastener 4 is formed for this purpose. Both upper flanges 31A of the saddle portion 31 and both lower flanges 32A of the band portion 32 are attached to the fluid pipe 1 by the fastening operation of the fastening bolts 4A and nuts 4B of the bolt fastener 4 .

As shown in FIG. 3, the branch plug main body 33 includes a valve operating shaft 33A for opening and closing the ball valve, a branch connection port 33B communicating with the ball valve from the opposite side of the valve operating shaft 33A, and a and a lid portion 33C that seals and closes an opening of a passage for work (not shown) that communicates from above.

The branch port 2 of the fluid pipe 1 is fitted with a cylindrical antirust core 6 having excellent corrosion resistance and rust resistance for suppressing corrosion and rusting of the inner peripheral surface of the fluid pipe 1 . A radially outer end portion of the rust-preventing core 6 protrudes radially outwardly in an internal space formed between the outer surface of the fluid pipe 1 and the inner surface of the existing branch plug 3 . .

Next, the removal jig 5 for removing the existing branch plug 3 to be replaced with water leakage in the above-described fluid piping structure in a non-disrupted state and a method for removing the existing branch plug 3 using the same will be described.
As shown in FIGS. 1, 3, and 4, the removal jig 5 is a substantially gate-shaped metal jig body that can be detachably attached to the existing branch cock 3 of the fluid pipe 1. 51. The jig main body 51 includes a pair of legs 52 arranged at a distance slightly larger than the pipe radial width between the tips of the upper flanges 31A of the saddle 31, and the upper ends of the legs 52 integrally. and a connecting portion 53 connected to the .
Each of the two legs 52 consists of a pair of vertical side plates 52A arranged in the pipe axis direction at a distance slightly larger than the head diameter of the fastening bolt 4A of the bolt fastener 4, and two places above and below the both vertical side plates 52A. and a lateral side plate 52B that is fixed in a lateral posture.
The connecting portion 53 includes a substantially U-shaped central top plate 53A forming a downwardly opening concave portion 54 into which the lid portion 33C of the existing branch cock 3 can be inserted, and both lower end portions and both legs of the central top plate 53A. It is composed of a substantially "L"-shaped side ceiling member 53B that is integrally connected to the upper end portion of the portion 52, and a reinforcing plate 53C that is fixed to the center position in the width direction of each side ceiling member 53B. there is

The connecting portion 53 of the jig main body 51 is located in the branch port side attachment region for sealing the branch port 2 between the saddle portion 31 and the band portion 32 on the side of the branch plug main body 33 that divides the existing branch plug 3. A fastener 55 is provided that can tighten and fix the saddle portion 31 to the outer peripheral surface of the fluid pipe 1 in a sealed state. The number of fasteners 55 is set to be less (one in this embodiment) than the number of bolt fasteners 4 (two in this embodiment) installed in the existing branch cock 3 .
The fastener 55 is screwed from above to a nut member 55A fixed to a center position of the central ceiling member 53A of the joint portion 53 in the tube circumferential direction and the tube axial direction. and a tightening bolt 55B that presses the cover portion 33C of the corporation stop main body 33 from above.
The screwing stroke from the fastening state of the tightening bolt 55B of the fastening tool 55 to the fastening release side is configured to be larger than the screwing stroke from the fastening state of the fastening bolt 4A of the bolt fastening tool 4 to the fastening release side.

Both legs 52 of the jig main body 51 are provided with reaction force receiving portions 56 that contact the outer surfaces of both lower flanges 32A of the band portion 32 located outside the mounting area on the branch port side to receive the tightening reaction force of the fastener 55. is provided. Each reaction force receiving portion 56 has a reaction force receiving plate 56A that can contact the lower surface of both lower flanges 32A of the band portion 32 from below on each of the lower end portions of both vertical side plates 52A that constitute each leg portion 52. It is integrally formed.
Of the reaction force receiving plates 56A of the reaction force receiving portion 56, the tube axis facing interval W1 between both reaction force receiving plates 56A that are adjacent in the tube axis direction is slightly larger than the head diameter of the fastening bolt 4A of the bolt fastener 4. formed at large intervals. A space between the two reaction force receiving plates 56A facing each other in the direction of the tube axis is configured as an extraction port 57 for the fastening bolt 4A of the bolt fastener 4. As shown in FIG.
Further, as shown in FIGS. 1B and 4, of the reaction force receiving plates 56A of the reaction force receiving portion 56, the pipe diameter facing interval W2 between the two reaction force receiving plates 56A that face each other in the pipe radial direction is It is configured to be larger than the outer diameter of the fluid tube 1 .

Next, a method for removing the existing branch plug 3 using the removal jig 5 described above will be described.
[1] Mounting process of removal jig 5 As shown in FIGS. After mounting, the jig main body 51 is moved in the axial direction of the pipe and mounted on the existing branch plug 3 . At this time, of the reaction force receiving plates 56A of the reaction force receiving portion 56 provided on both legs 52 of the jig body 51, the pipe diameter facing interval W2 between the two reaction force receiving plates 56A that face each other in the pipe radial direction is Since the outer diameter of the jig main body 51 is larger than that of the fluid pipe 1 , the jig main body 51 can be easily attached to the fluid pipe 1 .
In a state where the jig body 51 is mounted on the existing branch plug 3 at a predetermined position, as shown in FIG. It is arranged above the center line of the lid portion 33</b>C of the plug body 33 . Both reaction force receiving plates 56A of each leg portion 52 of the jig body 51 are positioned on both sides of the bolt fastener 4 of the existing branch plug 3 in the axial direction of the pipe, and both lower flanges 32A of the band portion 32 is arranged at a lower position where it can come into contact with the lower surface of the

[2] Tightening process of the tightening tool 55 of the removal jig 5 As shown in FIGS. Tighten it while it is closed. As a result, the jig main body 51 rises, and the reaction force receiving plates 56A of the leg portions 52 of the jig main body 51 come into contact with the lower surfaces of the lower flanges 32A of the band portion 32 . Further, the tightening bolt 55B is tightened while the reaction force receiving plate 56A receives the tightening reaction force, and the saddle portion 31 is fixed to the outer peripheral surface of the fluid pipe 1 in a pressed state. As a result, the first rubber ring 35 for water stop provided on the inner surface of the saddle portion 31 on the side of the branch plug main body 33 and in a state of sealing the periphery of the branch port 2 and the rust-preventive core 6 can 1 in a hermetically sealed state.

[3] Removal process of bolt fastener 4 As shown in FIG. Remove from flange 32A. At this time, the unscrewed fastening bolt 4A can be easily pulled out through the extraction port 57 formed between the opposing reaction force receiving plates 56A.

[4] Moving process of existing corporation stop 3 and removal jig 5 As shown in FIG. The tightening bolt 55B of 55 is loosened. As a result, the distance between the upper flanges 31A of the saddle portion 31 and the lower flanges 32A of the band portion 32 is increased. The loosening operation amount of the tightening bolt 55B is set to such a degree that the existing branch plug 3 and the removing jig 5 can be pressed and moved along the outer surface of the fluid pipe 1 in the axial direction of the pipe by artificial force.
In the present embodiment, the radial dimension of the gap between the outer surface of the fluid pipe 1 and the inner surface of the saddle portion 31 and at least in the portion corresponding to the antirust core 6 in the axial direction of the tube (removal movement direction) is The tightening bolt 55B is loosened until it becomes larger than the antirust core 6 projecting dimension.

By loosening the tightening bolt 55B, the saddle portion 31 of the existing branch plug 3 is lifted by the pressurized fluid (water pressure) ejected from the branch port 2 of the fluid pipe 1, and the inner surface of the saddle portion 31 and the outer surface of the fluid pipe 1 are separated. , a gap larger than the projecting dimension of the antirust core 6 is formed. In this state, as shown in FIG. 9, the existing branch plug 3 and the removal jig 5 in the equipment installation area 1A of the fluid pipe 1 are moved in the same direction along the pipe axis direction with respect to the fluid pipe 1. Then, it passes through the antirust core 6 and is moved to the equipment removal work area 1B adjacent to the equipment installation area 1A. At this time, the existing branch plug 3 can pass through the projecting tip of the antirust core 6 in a non-contact state and can be smoothly moved to the equipment removal work area 1B.

As described above, the number of fasteners 55 of the jig body 51 is greater than the number of bolt fasteners 4 that fasten the saddle portion 31 and the band portion 32 of the existing branch plug 3 (two locations in this embodiment). Since it is set to a small number (one place in this embodiment), the loosening operation can be performed quickly, and the flow rate of the pressure fluid from the branch port 2 of the fluid pipe 1 can be reduced. Moreover, even if a problem occurs during the loosening operation and the sealing operation is to be performed again, it can be dealt with quickly by operating one tightening bolt 55B.

[5] Removal process of bolt fastener 4 and installation process of new fluid equipment When the existing branch plug 3 and the removal jig 5 are moved to the equipment removal work area 1B, the fluid pipe 1 is branched in an example of the new fluid equipment. A new saddle-type leakage repair fitting 7 (see FIGS. 10 and 11) surrounding the port 2 in a sealed closed state is attached.
As shown in FIGS. 10 and 11, the saddle-type new leakage repair fittings 7 used in this fluid device replacement method are a pair of semi-cylindrical newly installed and split fittings that can be attached to the fluid pipe 1 in a sandwiched state from above and below. It is provided with housings 71 and 72 and regular bolt fasteners (not shown) for fastening and fixing both newly installed and divided housings 71 and 72 to the fluid pipe 1 . In this embodiment, there are four bolt fastening operation locations for the regular bolt fastener.
10 and 11, in order to bolt-connect the newly installed leakage repair fitting 7 and the equipment mounting jig 8, the second bolt having a second fastening bolt 73A longer than the bolt length of the regular bolt fastener is used. A fastener 73 is used.

A recess 71b into which the protruding portion of the anticorrosive core 6 attached to the branch port 2 of the fluid pipe 1 can enter is provided in the central portion of the upper newly installed split housing 71 arranged to face the branch port 2 of the fluid pipe 1. is formed. A second water stop rubber ring 74 for sealing the surroundings of the branch port 2 and the antirust core 6 is attached to the outer peripheral portion of the recessed portion 71 b on the inner surface of the upper newly installed split housing 71 .
Second flanges 71A and 72A projecting outward in the diametrical direction are integrally formed at both circumferential ends of the newly installed split housings 71 and 72 . As shown in FIG. 11, second bolt insertion holes 75 are formed in the second flanges 71A and 72A of both newly installed split housings 71 and 72, respectively.
Both the second flanges 71A of the upper newly-split housing 71 and both the second flanges 72A of the lower newly-split housing 72 are connected to each other by a regular bolt fastener (or the second bolt fastener 73). Attached to tube 1 .

Before the tightening bolts 55B of the removal jig 5 are loosened, both the newly installed and divided housings 71 and 72 of the newly installed leakage repair fitting 7 are placed in the temporary installation area 1C (equipment removal work) adjacent to the equipment installation area 1A of the fluid pipe 1. side opposite to region 1B). A regular bolt fastener for fastening both the second flanges 71A of the upper newly-split housing 71 and both the second flanges 72A of the lower newly-split housing 72 is to attach the newly installed leakage repair fitting 7 to the outer surface of the fluid pipe 1. The connection is made loose enough to be pushed and moved in the direction of the tube axis by artificial force (or mechanical force). At this time, the radial dimension of the gap between the outer surface of the fluid pipe 1 and the inner surface of the upper newly-split housing 71 and at least in the portion corresponding to the rust preventive core 6 in the pipe axial direction is equal to the rust preventive core Adjust so that it is larger than the projection size of 6.

Next, the new leakage repair fitting 7, the existing branch plug 3, and the removal jig 5 are integrally moved in the same direction with respect to the fluid pipe 1 along the direction of the pipe axis. Then, the existing branch plug 3 and removal jig 5 in the equipment installation area 1A of the fluid pipe 1 are moved to the equipment removal work area 1B, and the new leakage repair fitting 7 in the temporary installation area 1C of the fluid pipe 1 is removed from the equipment installation area. Move to 1A. After that, the regular bolt fasteners of the new leakage repair fitting 7 are tightened to attach the new leakage repair fitting 7 to the equipment installation area 1A of the fluid pipe 1 in a sealed state.
After that, the tightening bolt 55B of the tightening tool 55 of the removing jig 5 is loosened until the tip of the bolt 55B is separated from the upper surface of the lid portion 33C of the branch plug main body 33. In this state, the saddle portion 31 and the band portion 32 on the side of the branch plug main body 33 are pulled out from the jig main body 51 in the axial direction of the tube, or the saddle portion 31 and the band portion 32 on the side of the branch plug main body 33 are pulled out. Then, the jig main body 51 is pulled out in the direction of the tube axis and removed.

[Second embodiment]
10 and 11 show a removal jig 5, a metal device mounting jig 8 for manipulating the newly installed leakage repair fitting 7 along the outer surface of the fluid pipe 1 in the direction of the pipe axis, A fluid device replacement method using a stopper portion 20 provided at a position apart from the existing branch plug 3 in the fluid pipe 1 by the set movement distance L of the existing branch plug 3 and the newly installed leakage repair fitting 7 is shown.
As shown in FIGS. 10 to 12, the device mounting jig 8 includes a mounting jig main body 81 that can be externally fixed integrally with the newly installed leakage repair fitting 7 in the temporary installation region 1C of the fluid pipe 1. FIG. The mounting jig main body 81 includes a temporary fixing portion 82 for temporarily fixing the newly installed and divided housing 71 on the upper side of the newly installed leakage repair fitting 7 against the fluid pipe 1 by pressing the newly installed and divided housing 71 in a sealed state. , 72 to the second flanges 71A and 72A of the second bolt fastener 73 by the second fastening bolt 73A and the pressing nut 83, and the first pressing force pressing the existing branch plug 3 from the pipe axis direction. A portion 85 and a second pressing portion 86 that presses the newly installed leakage repair fitting 7 from the pipe axis direction are provided.

As shown in FIGS. 10 to 12, the temporary fixing portion 82 of the mounting jig main body 81 is an example of a temporary fixing operation body, and the center of a screw provided in the center of a horizontal rectangular connecting plate 81A extends vertically. and a second tightening bolt 82B screwed onto the second nut member 82A from above.
The temporary fixation operation location of the temporary fixing portion 82 is set to one location, which is fewer than the permanent fixation operation locations (four locations) of the second fastener of the newly installed leakage repair fitting 7 .
As shown in FIG. 12, the first pressing portion 85 of the mounting jig main body 81 is composed of a first pressing plate 85A fixed to one end portion of the connecting plate 81A in the tube axis direction. The first pressing plate 85A is formed with a semi-elliptical first mounting recess 85B that can be attached to the fluid tube 1 from above. The first pressing plate 85A is arranged between the existing branch plug 3 and the newly installed leak repair fitting 7, and is in surface contact with the opposing end surface of the existing branch plug 3 and the opposing end surface of the newly installed leak repair fitting 7. As shown in FIG.

As shown in FIGS. 10 to 12, the second pressing portion 86 of the mounting jig main body 81 is composed of a second pressing plate 86A fixed to the other end of the connecting plate 81A in the tube axis direction. The second pressing plate 86A is formed with a semi-elliptical second mounting recess (not shown) that can be attached to the fluid tube 1 from above. One side surface of the second pressing plate 86A comes into surface contact with the other end surface of the newly installed leakage repair fitting 7, as shown in FIG. The other side surface of the second pressing plate 86A is configured as a pressing operation surface for pressing the newly installed leakage repair fitting 7 along the outer surface of the fluid pipe 1 in the axial direction of the pipe by artificial force.

As shown in FIG. 12, the connection portion 84 of the mounting jig main body 81 has a first pressure plate 85A and a second pressure plate 85A and a second pressure plate at each of both ends in the tube axis direction on both sides of the long side of the connection plate 81A. It has a substantially "L"-shaped connecting piece 84A that is fixed integrally with 86A. Each connecting piece 84A is formed with a bolt insertion recess 84B through which the second fastening bolt 73A is inserted.

On one side of the first pressing plate 85A facing the existing branch plug 3 and on both left and right side edges of the first mounting recess 85B formed in the first pressing plate 85A, the saddle portion of the existing branch plug 3 is provided. A pair of right and left metal handles 88 projecting to the outside on the lower side in the pressing movement direction through between the facing surfaces of both upper flanges 31A of band 31 and both lower flanges 32A of band portion 32 are provided. The upper side surface 88a of each handle 88 is configured to be able to contact the lower surface of each upper flange 31A of the saddle portion 31. As shown in FIG. At the tip of each handle 88, a protrusion 88b is formed which can be engaged with one side surface of each upper flange 31A of the saddle portion 31 in the tube axis direction.

The stopper part 20 is externally fixed at a position apart from the existing branch plug 3 in the fluid pipe 1 by the set movement distance L of the existing branch plug 3 and the newly installed leakage repair fitting 7 before executing the equipment moving step. This set movement distance L is, as shown in FIG. 2 center).

As shown in FIG. 10, the fastener that constitutes the stopper portion 20 has a substantially U-shaped metallic stopper body 21 that can be attached to the fluid tube 1 from above. The stopper body 21 is formed with a mounting recess (not shown) having a length that allows the fluid pipe 1 to be mounted over a range of 180 degrees or more. When the mounting recess of the stopper body 21 is fitted to the fluid pipe 1, the center portion of the stopper body 21 in the pipe circumferential direction is positioned at the top of the outer surface of the fluid pipe 1, and both ends of the stopper body 21 in the pipe circumferential direction are Located on the lower half side of the outer surface of the fluid pipe 1 .
A cylindrical female screw portion 22 having a thread center directed toward the pipe axis of the fluid pipe 1 is formed in each of the pipe circumferential direction center portion and the pipe circumferential direction both end portions of the stopper body 21 . A fixing bolt 23 for fastening and fixing a stopper portion 20 fitted to the fluid pipe 1 is screwed into each female screw portion 22 .

A central stopper surface 22a is formed on the female threaded portion 22 at the central portion in the pipe circumferential direction of the stopper body 21 so as to come into contact with the circumferentially central portion of the other end surface of the saddle portion 31 of the existing branch plug 3 from the direction of the pipe axis. there is Further, the female threaded portions 22 at both ends of the stopper body 21 in the pipe circumferential direction have end stopper surfaces 22b that abut against the other end surfaces of both lower flanges 32A of the band portion 32 of the existing branch plug 3 from the pipe axis direction. formed.

Next, a fluid equipment replacement method for replacing the existing branch cock 3 with a new leakage repair fitting 7 in an uninterrupted flow state using a fluid equipment replacement device having a removal jig 5, an equipment mounting jig 8, and a stopper portion 20. will be described while omitting the steps described in the first embodiment as much as possible.
[6] Step of Mounting New Leak Repair Metal Fitting 7 The step of mounting the new leak repair metal fitting 7 is executed at an appropriate stage before the equipment moving process of the first embodiment.
As shown in FIGS. 10 and 11 , an upper newly installed split housing 71 and a lower newly installed split housing 72 constituting the newly installed leakage repair fitting 7 are mounted on the temporary installation area 1C of the fluid pipe 1 . The second flange 71A of the newly installed and split housing 71 on the upper side and the second flange 72A of the newly installed and split housing 72 on the lower side are connected to each other by the second bolt fastener 73 longer than the bolt length of the regular bolt fastener. It connects with the 2nd fastening bolt 73A and the 2nd nut 73B.
The coupling of both newly installed and divided housings 71 and 72 by the second bolt fastener 73 is performed by pushing and moving the newly installed leakage repair fitting 7 along the outer surface of the fluid pipe 1 in the direction of the tube axis by artificial force (or mechanical force). Connect as loosely as possible. In this new leak repair fitting installation process, in this embodiment, as shown in FIG. Both newly installed separate housings 71 and 72 constituting the newly installed leakage repair fitting 7 are temporarily attached to the fluid pipe 1 in a state in which the radial dimension of the gap in the corresponding part in the direction is larger than the projecting dimension of the antirust core 6 . A step of externally connecting to the installation area 1C is included.
In FIG. 11 , since the newly installed leak repair fitting 7 is in a state of being lowered by its own weight with respect to the fluid pipe 1 , the gap generated by the loose connection of the second bolt fastener 73 is It appears between the inner surface of the split housing 72 .

[7] Mounting process of device mounting jig 8 and stopper portion 20 As shown in FIGS. 83 is screwed to fix the device mounting jig 8 fitted to the fluid pipe 1 to the newly installed leakage repair fitting 7 .
Further, in the state where the equipment mounting jig 8 is attached to the newly installed leak repair fitting 7, there is at least A gap larger than the projecting dimension of the rust-preventing core 6 is formed at a portion corresponding to the rust-preventing core 6 in the axial direction of the tube.
The stopper main body 21 of the stopper portion 20 is mounted on the outside of the fluid pipe 1 at a position separated from the existing branch plug 3 by the set movement distance L of the existing branch plug 3 and the newly installed leakage repair fitting 7 . The stopper body 21 is fixed to the fluid pipe 1 by tightening the fixing bolts 23 provided at the central portion in the pipe circumferential direction and both ends in the pipe circumferential direction of the stopper body 21 .

[8] Moving process of existing corporation stop 3, removal jig 5, newly installed leakage repair fitting 7, and equipment mounting jig 8 The tightening bolt 55B of one tightening tool 55 press-fixed to the outer peripheral surface of the is loosened. The loosening operation amount of the tightening bolt 55B is set to such a degree that the existing branch plug 3 and the removing jig 5 can be pressed and moved along the outer surface of the fluid pipe 1 in the axial direction of the pipe by artificial force.
In the present embodiment, the radial dimension of the gap between the outer surface of the fluid pipe 1 and the inner surface of the saddle portion 31 and at least in the portion corresponding to the antirust core 6 in the axial direction of the tube (removal movement direction) is The tightening bolt 55B is loosened until it becomes larger than the antirust core 6 projecting dimension.

In this moving process, when the handle 88 of the device mounting jig 8 is lifted, the tightening bolt 55B of the tightening tool 55 is loosened, and the saddle portion 31 of the existing branch cock 3 and the second bolt fastener 73 are loosened. The newly installed split housing 71 on the upper side of the newly installed leakage repair fitting 7 is lifted in an inclined posture. At this time, since the pressure fluid ejected from the branch port 2 of the fluid pipe 1 exerts a lifting force on the existing branch plug 3, the lifting operation force of the handle 88 can be reduced accordingly.
As a result, the saddle portion 31 of the existing branch cock 3 and the newly installed split housing 71 on the upper side of the newly installed leakage repair fitting 7 can be easily lifted with a small force, and the existing branch cock 3 and the newly installed leakage repair fitting 7 can be easily lifted. can be performed more efficiently and easily.

When the fluid device moving process is executed, the existing branch plug 3 and the removing jig 5 are separated until the other end surfaces of the saddle portion 31 and the band portion 32 of the existing branch plug 3 come into contact with the stopper surfaces 22 a and 22 b of the stopper portion 20 . The newly installed leakage repair fitting 7 and the device mounting jig 8 are moved in the same direction along the axial direction of the fluid pipe 1 . As a result, the existing branch plug 3 and removal jig 5 in the equipment installation area 1A of the fluid pipe 1 pass through the antirust core 6 and are moved to the equipment removal work area 1B. The newly installed leakage repair fitting 7 and the equipment mounting jig 8 in the temporary installation area 1C of the fluid pipe 1 are moved over the antirust core 6 to the equipment installation area 1A.
In this equipment moving process, when the second pressing plate 86A of the equipment mounting jig 8 is pressed by an artificial force from the axial direction of the tube, the pressing operation force is applied to both the newly installed and divided housings 71 and 72 of the newly installed leakage repair fitting 7. transmitted. At the same time, the pressing operation force is transmitted to the existing branch cock 3 via the first pressing plate 85A of the equipment mounting jig 8 . As a result, the existing branch plug 3 and the new leakage repair fitting 7 can be reliably moved along the pipe axis direction.

[9] Fastening and Fixing Step of New Leakage Repair Metal Fitting 7 A fastening and fixing step of fastening and fixing the new leak repair metal fitting 7 to the equipment installation region 1A of the fluid pipe 1 is executed. This fastening and fixing step includes a temporary fixing step of temporarily fixing the upper newly installed split housing 71 of the newly installed leak repair fitting 7 to the fluid pipe 1 in a sealed state, and a temporary fixing step of temporarily fixing the newly installed leak repair fitting 7 to the fluid. and a final fixing step of fastening and fixing to the pipe 1 in a sealed state.
In the temporary fixing step, the second tightening bolt 82B constituting the temporary fixing portion 82 of the device mounting jig 8 is screwed to the tightening side, and attached to the outer peripheral portion of the recess 71b on the inner surface of the upper newly divided housing 71. A second rubber ring 74 is crimped onto the outer surface of the fluid tube 1 to seal it. At this time, the tip of the protruding portion of the antirust core 6 attached to the branch port 2 of the fluid pipe 1 enters into the concave portion 71b of the protruding protruding portion 71B formed in the upper newly divided housing 71. As shown in FIG.

In the main fixing process, first, of the four bolt connection portions that connect the newly installed leakage repair fitting 7 and the device mounting jig 8, the second bolt fastener 73 that constitutes one bolt connection portion is 2. The fastening bolt 73A, the second nut 73B and the holding nut 83 are removed, replaced with regular bolts and nuts (not shown) used for the newly installed leakage repair fitting 7, and fastened and fixed. Then, in this procedure, all the bolts and nuts are replaced with regular bolts and nuts in order and fastened and fixed.

[10] Device Removal Step A removal step is performed to remove the device mounting jig 8, the existing branch plug 3, the removal jig 5, and the stopper portion 20 from the fluid pipe 1. FIG.
In the process of removing the device mounting jig 8, as described above, the second fastening bolt 73A and the second nut of the second bolt fastener 73 constituting the bolt connection portion between the newly installed leakage repair metal fitting 7 and the device mounting jig 8 are removed. The equipment mounting jig 8 is removed by removing the 73B and the retaining nut 83 and replacing them with regular bolts and nuts used for the newly installed leak repair fitting 7 .
The removing jig 5 loosens the tightening bolt 55B of the tightening tool 55 until the tip of the bolt 55B is separated from the upper surface of the lid portion 33C of the corporation stop main body 33 . After that, the saddle portion 31 and the band portion 32 on the side of the branch plug main body 33 are pulled out from the jig main body 51 in the axial direction of the tube, or the saddle portion 31 and the band portion 32 on the side of the branch plug main body 33 are fixed. The tool main body 51 is pulled out in the axial direction of the tube and removed.
The stopper part 20 is removed by loosening each fixing bolt 23 and extracting the stopper body 21 upward from the fluid pipe 1 .

[Other embodiments]
(1) In the above-described second embodiment, the removal jig 5 and the device mounting jig 8 are configured separately, but the removal jig 5 and the device mounting jig 8 may be configured integrally. .

(2) In each of the above-described embodiments, the saddle-type existing branch cock 3 is taken as an example of the existing fluid device having a split structure that seals and surrounds the branch port 2 formed in the pipe wall of the device installation area 1A. However, it may be an existing gate valve, an existing T-shaped pipe, or the like.

(3) In each of the above-described embodiments, as a new fluid device, the saddle-type new leakage repair fitting 7 that surrounds the branch port 2 of the fluid pipe 1 in a sealed closed state was described as an example. A newly installed sluice valve, a newly installed T-shaped pipe, or the like may be used.

(4) In each of the above-described embodiments, one end of the antirust core 6 attached to the branch port 2 of the fluid pipe 1 is positioned between the outer surface of the fluid pipe 1 and the inner surface of the existing branch cock (existing fluid equipment) 3. Although the fluid piping structure protruding into the internal space formed therebetween has been described as an example, it is not limited to this fluid piping structure. For example, the present invention may be applied to a fluid pipe structure in which the antirust core 6 is attached to the branch port 2 in such a state that one end of the antirust core 6 on the outer side in the pipe radial direction and the outer surface of the fluid pipe 1 are flush or substantially flush with each other. technique may be applied. Furthermore, the technology of the present invention may be applied to a fluid piping structure in which the anticorrosive core 6 is not attached to the branch port 2 .

(5) In each of the above-described embodiments, the jig body 51 of the removal jig 5 is provided with the reaction force receiving portions 56 that abut on the outer surfaces of the lower flanges 32A of the band portion 32 located outside the mounting area on the branch port side. provided, but is not limited to this configuration. For example, the jig main body 51 of the removal jig 5 may be provided with a reaction force receiving portion 56 that abuts against the outer surface of the fluid tube 1 and receives the tightening reaction force of the fastener 55 .

1 fluid pipe 1A equipment installation area 2 branch port 3 existing fluid equipment (existing branch cock)
4 bolt fastener 31 divided housing (saddle part)
31A flange (upper flange)
32 divided housing (band part)
32A flange (lower flange)
51 Jig main body 55 Clamping tool 56 Reaction receiving part 57 Extraction port

Claims (5)

An existing fluid device with a split structure that seals and surrounds a branch opening formed in the pipe wall of the device installation region is detachably fixed to the device installation region on the outer peripheral surface of the fluid pipe with a plurality of bolt fasteners. In a fluid piping structure in which a
Among a plurality of existing divided housings constituting the existing fluidic device, an existing divided housing in a branch port side mounting area for sealing the branch port is attached to a jig body that can be attached to the existing fluidic device. The number of fasteners that can be tightened and fixed in a pressed state to the outer peripheral surface of the and is smaller than the number of bolt fasteners installed, and another existing divided housing located outside the branch port side mounting area or the outer surface of the fluid pipe and a reaction force receiving portion that abuts against and receives the tightening reaction force of the fastener. 2. A removal jig for a fluid device according to claim 1, wherein only one fastener is provided in the central portion of said jig body. 3. The fluid device according to claim 1 or 2, wherein a screwing stroke from the tightened state of the fastener to the unlocked side is larger than a screwing stroke from the tightened state of the bolt fastener to the unlocked side. removal jig. The reaction force receiving portion of the jig body is provided on both sides of the existing split housing outside the branch opening side mounting area fixedly connected to both flanges of the existing split housing in the branch opening side mounting area by the bolt fasteners. The fluid device according to any one of claims 1 to 3, wherein each of the reaction force receiving portions abuts on the outer surface of the flange, and each of the reaction force receiving portions is formed with an extraction port for the bolt of the bolt fastener. Removal jig. 5. A removal jig for a fluid device according to claim 4, wherein the distance between said reaction force receiving portions of said jig body is larger than the outer diameter of said fluid pipe.

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