JP2007138998A - Fluid equipment and branch pipe renewing method for fluid piping system and branch pipe and fluid equipment withdrawing method as well as branch pipe portion shut-off method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow efficient, reliable and easy renewing work for fluid equipment or a branch pipe connected to a branch pipe portion with no water leakage even under circumstances that an on-off valve is not mounted between the branch pipe portion and the fluid equipment. <P>SOLUTION: A working pipe portion 6 opposed to a base end opening 2a of the branch pipe portion 2 is protruded on the pipe wall of a fluid pipe 1, a drilling device is connected to a first on-off valve 7 connected to the working pipe portion 6, and an insertion port 8 is drilled in the pipe wall of the fluid pipe 1 opposed to the base end opening 2a of the branch pipe portion 2. After the drilling device is withdrawn in the state of closing the first on-off valve 7, a closing means C for a closing device B connected to the first on-off valve 7 is delivered into the branch pipe portion 2 to close a flow path W. Furthermore, after the fluid equipment 3 for the branch pipe portion 2 or the branch pipe is withdrawn, a new fluid equipment or branch pipe is connected thereto via a second on-off valve and the closing device is withdrawn in the state of closing the first on-off valve. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fluid device such as an air valve or a fire hydrant connected to a branch pipe portion of a fluid pipe such as a water pipe or a fluid equipment of a fluid piping system that renews a branch pipe while maintaining fluid transportation in the fluid pipe. Branch pipe renewal method, branch pipe / fluid equipment removal method of fluid piping system for removing the branch pipe or fluid equipment connected to the branch pipe portion of the fluid pipe while maintaining fluid transportation in the fluid pipe, and fluid The present invention relates to a branch pipe section blocking method for blocking a flow path of a branch pipe section of a pipe while maintaining fluid transportation in a fluid pipe.

  This type of fluid piping system, for example, as shown in FIG. 1, a connecting flange portion of a branch pipe portion formed in the middle of a water pipe that is an example of a fluid pipe, a lower end of an air valve that is an example of a fluid device, In water pipe systems in which the formed connecting flange part is detachably fastened with fasteners such as bolts and nuts, an air valve that has reached the end of its service life or has leaked or has failed is newly selected. It is necessary to replace the specified on-off valve (repair valve, etc.) and air valve.

  At this time, when the on-off valve is connected between the connecting flange portion of the branch pipe portion and the connecting flange portion of the air valve, the upper pipe connecting flange portion of the on-off valve from which the air valve has been removed is connected to the branch pipe. A flow path closing device having a closing means for blocking the flow path in the section is connected, and the closing means of this flow path closing apparatus is sent to a flow path blocking position in the branch pipe section through an on-off valve to close the flow path. Thus, the air valve can be replaced with a new air valve.

  However, when an on-off valve is not provided between the branch pipe part and the air valve, or the on-off valve provided between the branch pipe part and the air valve becomes inoperable while being opened. When the flow path closing device for blocking the flow path in the branch pipe portion cannot be used, and the on-off valve provided between the branch pipe portion and the air valve is a butterfly valve In this butterfly valve, since there is a valve body and both valve rods for rotatably supporting the valve body, in this state, the closing means of the flow path closing device is sent to the flow path blocking position in the branch pipe section. Cannot be used.

  Then, using the technique shown in Patent Document 1, after attaching a freezing device to the branch pipe part of the water pipe, freezing the clean water (fluid) in this branch pipe part and blocking the flow of clean water, A method of removing an air valve or an on-off valve (such as a repair valve or a butterfly valve) from the connecting flange portion of the branch pipe portion and connecting a new on-off valve and air valve designated to the connecting flange portion of the branch pipe portion is conceivable. .

  Further, when the on-off valve is a butterfly valve, using the technique shown in Patent Document 2, before the flow path closing step by the flow path closing device, the upper connecting flange portion of the butterfly valve from which the air valve has been removed, A drilling device is connected via a work on / off valve, and both the valve stem and valve body of the butterfly valve are cut and removed by the tip drilling tool (hole saw) of this drilling device, and then the work on / off valve is closed. The apparatus is removed, and a flow path closing device provided with a closing means for blocking the flow path in the branch pipe portion is connected to the upper connection flange portion of the work on / off valve after the removal, and water is passed through the work on / off valve. A method is conceivable in which the flow path in the branch pipe part is closed by a closing means inserted into the branch pipe part of the pipe.

  In this latter method, after the flow path is closed by the closing means of the flow path closing device, the butterfly valve and the work are connected from the connecting flange portion of the branch pipe portion while at least the closing means of the flow path closing device remains in the flow path closed state. Remove the open / close valve for the pipe, and connect the case that can store the specified new open / close valve and the remaining component of the flow-path blocking device to the connection flange of the branch pipe section to block the flow path. Pull the remaining component of the device into the case. In this state, the on-off valve is closed to remove the remaining structural member and the case, and a new air valve is connected to the on-off valve after the removal.

Japanese Patent No. 3636800 JP 2004-239409 A

  In the former method, since the fresh water in the branch pipe section is frozen while maintaining the flow of fresh water in the water pipe, the frozen state cannot be confirmed from the outside, and more time is required for freezing. However, the reliability of the freeze-blocking performance is low, and a large amount of water may be ejected at the moment when the on-off valve or air valve is removed from the branch pipe section or at the moment of removing the air valve from the on-off valve.

In the latter replacement method, it is necessary to cut and remove both valve stems and the valve body of the butterfly valve with the tip punching tool of the drilling device, which increases the construction cost and the number of work processes, and increases the construction cost. There is an inconvenience that causes an increase in the construction period.
In particular, when the butterfly valve is malfunctioning in the open state, a large amount of clean water is ejected from the butterfly valve at the moment when the air valve is removed from the butterfly valve, so this method cannot be employed.
Also, when the branch pipe or fluid device connected to the branch pipe portion of the water pipe is removed while maintaining the water supply (fluid) transport in the water pipe, the same problem as described above has occurred.

  The present invention has been made in view of the above circumstances, and the first main problem is, for example, even in a situation where no on-off valve is interposed between the branch pipe portion and the fluid device, or Even under the condition that the branch pipe part of the fluid pipe is bent or curved, the renewal work of the fluid device or branch pipe connected to the branch pipe part can be performed efficiently and reliably without leakage. The second main problem is to efficiently remove the fluid equipment connected to the branch pipe section or the branch pipe without leaking water. It is to provide a method for removing a branch pipe / fluid device of a fluid piping system that can be surely and easily performed. Further, the third main problem is to improve the efficiency of shutting off the flow path of the branch pipe section without leaking water. A branch pipe blocking method that can be performed reliably and easily. It lies in the fact to provide.

The first characteristic configuration according to the present invention is a fluid device or branch pipe update of a fluid piping system that updates a fluid device or a branch tube connected to a branch pipe portion of a fluid pipe while maintaining fluid transportation in the fluid pipe. The method includes the following steps 1) to 3).
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) Pull the distal end punching tool of the perforating device downstream from the first on-off valve, and after removing the perforating device in a state where the first on-off valve is closed, A closing device having closing means capable of closing the flow path is connected, and the closing means of the closing device is connected to the flow closing position in the branch pipe portion through the first opening / closing valve, the working tube portion and the insertion port of the tube wall. Feed in to close the flow path.
3) After removing the old fluid device or branch pipe connected to the branch pipe portion, a new fluid device or branch pipe is connected to the branch pipe portion, and the closing means of the closing device is first opened and closed. After drawing out downstream from the valve, the closing device is removed with the first on-off valve closed.

  According to the above characteristic configuration, when it becomes necessary to replace a fluid device or a branch pipe in a fluid piping system that has reached the end of life or where water leakage or a failure has occurred with a new designated fluid device or branch pipe, the fluid Even under the condition where the branch pipe section of the pipe and the fluid device or branch pipe to be replaced are directly connected, the fluid pipe facing the base end opening of the branch pipe section in a concentric or substantially concentric state By forming a working tube portion on the tube wall and forming an insertion port with a punching device connected to the working tube portion via a first on-off valve, the proximal end of the branch tube portion is passed through this insertion port. The flow path of the branch pipe portion can be reliably closed (blocked) by the closing means of the closing device inserted from the opening side.

Therefore, the old fluid device or branch pipe connected to the branch pipe portion of the fluid pipe can be reliably and easily replaced with a designated new fluid device or branch pipe without leakage, and the branch pipe of the fluid pipe Even under the condition that the portion is bent or curved, it can be reliably and easily blocked on the base end opening side of the flow path of the branch pipe portion.
Furthermore, even if the fluid equipment to be replaced is a butterfly valve and an air valve, it is not necessary to cut and remove both butterfly valve stems and valve bodies using the tip drilling tool of the drilling device as in the past. The scale can be reduced, and even when an old on-off valve provided between the branch pipe portion and the air valve is broken in the open state, it can be reliably and easily implemented without water leakage.

  Therefore, even in a situation where no on-off valve is interposed between the branch pipe part and the fluid device, or even under a condition where the branch pipe part of the fluid pipe is bent or curved, The renewal operation of the connected fluid device or branch pipe can be performed efficiently and reliably without leakage, and can be advantageously carried out in terms of construction cost.

A second characteristic configuration according to the present invention is a fluid equipment of a fluid piping system that renews a fluid equipment or a branch pipe connected to a straight branch pipe portion of the fluid pipe while maintaining fluid transportation in the fluid pipe. This is a branch pipe update method, and includes the following steps 1) to 5).
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) Pull the distal end punching tool of the punching device downstream from the first on-off valve, remove the punching device with the first on-off valve closed, and then connect the flow of the branch pipe section to the first on-off valve. A closing device having a closing means capable of closing the passage is connected, and the closing means of this closing device is sent to the flow path closing position in the branch pipe portion through the first opening / closing valve, the working tube portion and the insertion port of the tube wall. Close the flow path with.
3) After removing the old fluid device or branch pipe connected to the branch pipe section, a second on-off valve is connected to the branch pipe section, and the closing means of the closing device is made to be more than the first on-off valve. After drawing out to the downstream side, the closing device is removed with the first on-off valve closed.
4) A closing device is connected to the opening / closing valve on the branch pipe portion side, and the closing means of the closing device is connected to the flow passage closing position in the working pipe portion through the second opening / closing valve, the branch pipe portion and the insertion port of the tube wall. After feeding in and closing the flow path, the first on-off valve is removed from the working tube.
5) Next, a lid for sealing the end opening of the working pipe is connected to the working pipe, and the closing means of the closing device is drawn downstream from the second opening / closing valve to open and close the branch pipe. While the valve is closed, the closing device is removed, and a new fluid device or branch pipe is connected to the second on-off valve.

  According to the above characteristic configuration, when it becomes necessary to replace a fluid device or a branch pipe in a fluid piping system that has reached the end of life or where water leakage or a failure has occurred with a new designated fluid device or branch pipe, the fluid Even under the condition where the branch pipe section of the pipe and the fluid device or branch pipe to be replaced are directly connected, the fluid pipe facing the base end opening of the branch pipe section in a concentric or substantially concentric state By forming a working tube portion on the tube wall and forming an insertion port with a punching device connected to the working tube portion via a first on-off valve, the proximal end of the branch tube portion is passed through this insertion port. The flow path of the branch pipe portion can be reliably closed (blocked) by the closing means of the closing device inserted from the opening side.

  Therefore, the old fluid device or branch pipe connected to the branch pipe portion of the fluid pipe can be reliably and easily replaced with a designated new fluid device or branch pipe without leakage, and the fluid equipment to be replaced Even if a butterfly valve and an air valve are used, it is not necessary to cut and remove both valve stems and valve bodies of the butterfly valve using a hole saw of a punching device as in the prior art, and the construction scale can be reduced accordingly. In addition, it is possible to carry out surely and easily even when the gate valve or the like is broken in the open state.

  In addition, after the old fluid device or branch pipe is removed from the branch pipe section in a state where the flow path of the branch pipe section is shut off, a new second on-off valve and fluid equipment are not immediately attached to the branch pipe section. The second on-off valve is used as a work on-off valve, and the closing means of the closing device connected to the second on-off valve is connected to the inside of the work pipe through the second on-off valve, the branch pipe part and the insertion port of the pipe wall. The first on-off valve can be recovered from the working pipe section by sending it to the passage closing position and closing the passage, and the lid is less expensive than the first on-off valve and has a small amount of outward projection. The end opening of the working tube portion can be reliably sealed using the body.

  Therefore, for example, even when no on-off valve is interposed between the branch pipe section and the fluid equipment, the updating operation of the fluid equipment or branch pipe connected to the branch pipe section can be performed efficiently without leakage. Since it can be performed reliably and easily, and the first on-off valve can be recovered by using the newly installed second on-off valve and closing device, reduction in construction cost can be promoted.

  A third characteristic configuration according to the present invention is that a contact plate portion fixed to the outer peripheral surface of the fluid tube is connected to the working tube portion.

  According to the above-described characteristic configuration, the contact plate portion of the working tube portion is welded or the like to the outer peripheral surface of the tube wall of the fluid tube that is concentric or substantially concentric with the proximal end opening of the branch tube portion. It is only necessary to fix them, and it is possible to promote the efficiency of the renewal work of the fluid device or the branch pipe and the reduction of the construction cost.

  According to a fourth characteristic configuration of the present invention, an arcuate mounting plate that is applied from one side in the radial direction to the pipe wall outer peripheral surface of the fluid pipe is connected to the working pipe portion, and the arcuate shape is provided. A fastening means for fastening and fixing the mounting plate to the outer peripheral surface of the pipe wall of the fluid pipe is provided.

  According to the above characteristic configuration, the outer peripheral surface of the pipe wall of the fluid pipe that is concentrically or substantially concentrically opposed to the proximal end opening of the branch pipe part is connected to the arcuate mounting plate provided continuously to the working pipe part. The arc-shaped mounting plate is simply fastened and fixed to the outer peripheral surface of the pipe wall of the fluid pipe by the fastening means, so that the efficiency of renewal work of the fluid equipment or the branch pipe and the reduction of the construction cost can be promoted. it can.

According to a fifth feature of the present invention, the branch pipe or fluid device is removed from the fluid piping system in which the branch pipe or fluid device connected to the branch pipe portion of the fluid pipe is removed while maintaining fluid transportation in the fluid pipe. This method is characterized by comprising the following steps 1) to 3).
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) After removing the piercing device with the first on-off valve closed, the first on-off valve is connected to a closing device having a closing means capable of closing the flow path of the branch pipe portion. The closing means is sent through the first on-off valve, the working pipe section and the insertion opening of the pipe wall to the flow path closing position in the branch pipe section to close the flow path.
3) After removing the branch pipe or the fluid device connected to the branch pipe part, the lid for sealing the end opening of the branch pipe part is connected to the branch pipe part, and the closing means of the closing device is the first. After drawing out to the downstream side of the on-off valve, the closing device is removed with the first on-off valve closed.
In the point.

  According to the above characteristic configuration, when it becomes necessary to remove the branch pipe or fluid device in the fluid piping system that has reached the end of its service life or in which water leakage or failure has occurred, the branch pipe or fluid is added to the branch pipe portion of the fluid pipe. Even under the condition that the equipment is directly connected, the working pipe is projected on the pipe wall of the fluid pipe facing the base end opening of the branch pipe in a concentric or substantially concentric state. The insertion port is formed by a perforating device connected to the working tube portion via the first on-off valve, and branched by the closing means of the closing device inserted from the proximal end opening side of the branch tube portion through this insertion port. The flow path of the pipe part can be reliably closed (blocked).

  Therefore, even in a situation where no on-off valve is interposed between the branch pipe part and the branch pipe or the fluid device, or even under a condition where the branch pipe part of the fluid pipe is bent or curved, The old branch pipe or fluid device connected to the branch pipe section of the pipe can be reliably and easily removed without water leakage, and can be advantageously implemented in terms of construction cost.

A sixth characteristic configuration according to the present invention is a branch pipe section blocking method for a fluid piping system that blocks a flow path of a branch pipe section of a fluid pipe while maintaining fluid transportation in the fluid pipe. And 2).
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) Pull out the tip piercing tool of the piercing device downstream from the first on-off valve, remove the piercing device with the first on-off valve closed, and then connect the first on-off valve to the flow of the branch pipe section. A closing device having a closing means capable of closing the passage is connected, and the closing means of this closing device is sent to the flow path closing position in the branch pipe portion through the first opening / closing valve, the working tube portion and the insertion port of the tube wall. Close the flow path with.
In the point.

  According to the above characteristic configuration, when it becomes necessary to replace a fluid device or a branch pipe in a fluid piping system that has reached the end of life or where water leakage or a failure has occurred, with a new designated fluid device or branch pipe, or When it is necessary to repair the water leakage generated in the branch pipe portion of the fluid pipe, the working pipe is disposed on the wall of the fluid pipe facing the base end opening of the branch pipe portion in a concentric or substantially concentric state. The insertion port is formed by a perforating device that protrudes from the working pipe and is connected to the working pipe via the first on-off valve, and is inserted from the proximal end opening side of the branch pipe through the insertion. The flow path of the branch pipe portion can be reliably closed (blocked) on the proximal opening side by the closing means of the closing device.

  Therefore, even if the on-off valve is not interposed between the branch pipe part and the fluid device, or under the condition that the branch pipe part of the fluid pipe is bent or curved, The flow path blocking operation can be performed efficiently and surely and easily without water leakage, and can be advantageously performed in terms of construction cost.

[First Embodiment]
1 to 9 show a connecting flange portion of a straight branch pipe portion 2 that is integrally formed to project radially outward in the middle of a water pipe 1 which is an example of a fluid pipe constituting a fluid piping system. (An example of a connecting portion) 2A is a connecting flange portion (an example of a connecting portion) formed at an upstream end (lower end) of an air valve 3 that is an example of a fluid device. In a branch connection structure that is detachably connected in a watertight state (sealed state) via a bolt 4 and a nut 5, the flow of clean water (tap water, which is an example of fluid) in the water pipe 1 is maintained. The air valve 3 is replaced with a new second on-off valve 32 and a new air valve 3 selected as shown in FIG. Fluid equipment renewal method for renewal and branch pipe section blocking method used in the method I, and a following step [1] - [7].

  [1] As shown in FIG. 2, of the outer peripheral surface of the pipe wall of the water pipe 1, relative to the proximal end opening 2 a of the branch pipe portion 2 in the radial direction with the pipe axis X of the water pipe 1 sandwiched therebetween. A straight working tube portion 6 having the same inner diameter as that of the branch tube portion 2 is protruded radially outwardly in a concentric or substantially concentric state with the branch tube portion 2.

  A base plate portion of the working pipe portion 6 is integrally provided with a contact plate portion 6A that is curved and formed with the same curvature as the outer peripheral surface of the pipe wall of the water pipe 1. The work pipe part 6 with respect to the pipe wall of the water pipe 1 is secured to the outer peripheral surface of the pipe wall 1 by welding the entire outer peripheral edge of the backing plate part 6A applied along the outer side in the radial direction. Are attached in a watertight state (sealed state), and a connecting flange portion (an example of a connecting portion) 6B having the same shape as the connecting flange portion 2A of the branch pipe portion 2 is integrally formed at the distal end portion of the working tube portion 6. ing.

  [2] As shown in FIG. 3, the connection flange portion 6 </ b> A of the work pipe portion 6 is provided with a connection flange portion 7 </ b> A on the upstream side of a new first on-off valve (repair valve) 7, which is an example of a fluid device, It is fixedly connected in a watertight state (sealed state) via bolts 4 and nuts 5 as an example of a fastener, and the first on-off valve 7 and the work are connected to the connecting flange portion 7B on the downstream side of the first on-off valve 7. The connecting flange portion 13A of the punching device A provided with the tip punching tool 9 capable of punching the insertion port 8 through the pipe wall 6 of the water pipe 1 through each inside of the pipe portion 6 is a bolt 4 and nut 5 as an example of a fastener. And fixedly connected in a watertight state (sealed state).

  The punching apparatus A is assembled with a drive rotating means having a known structure for applying a driving rotational force to the drive rotating shaft 10 provided with the tip punching tool 9 and a feeding means having a known structure for applying a feeding force to the driving rotating shaft 10. The downstream connection flange portion 13B of the connection case 13 provided with the storage space 12 for the distal end punch 9 is connected to the connection flange portion 11A of the drilling main body case 11 via a bolt 4 and a nut 5 which are examples of fasteners. While being fixedly connected in a watertight state (sealed state), the upstream side connection flange portion 13A of the connection case 13 is connected to the downstream side connection flange portion 7B of the first on-off valve 7 via bolts 4 and nuts 5. It is fixedly connected in a state (sealed state).

  The tip punch 9 includes a bottomed cylindrical hole saw 9A provided with a cutting tip at the tip, and a center drill 9B provided in a state of protruding forward from the cutting tip from the rotation center position of the bottom. It is composed of

  [3] As shown in FIG. 4, after operating the operating lever 7D of the first on-off valve 7 to open the ball valve body 7C, the driving rotary shaft 10 of the punching device A is rotated while driving. 1 By passing the tip punch 9 through the inside of the on-off valve 7 and the work pipe 6 to the pipe wall side of the water pipe 1, the pipe wall of the water pipe 1 corresponding to the proximal end opening of the work pipe 6 The insertion port 8 is pierced in a concentric or substantially concentric state with the proximal end opening 2a of the branch pipe portion 2.

  When the punching process by the punching device A is completed, the tip punching tool 9 of the punching device A is pulled out into the storage space 12 of the connection case 13, and then the first on-off valve 7 is closed, and the first on-off valve 7 removes the drilling device A.

  [4] As shown in FIG. 5, the downstream connecting flange portion 7 </ b> B of the first on-off valve 7 from which the punching device A has been removed is provided with a closing means C that can close the flow path W of the branch pipe portion 2. The connecting flange portion 15A of the device B is fixedly connected in a watertight state (sealed state) via a bolt 4 and a nut 5 which are examples of fasteners.

  As shown in FIGS. 4 to 8, the closing device B includes a connecting flange portion 15 </ b> A that is detachably fixedly connected to the downstream connecting flange portion 7 </ b> B of the first on-off valve 7 with bolts 4 and nuts 5. A cylindrical first operating shaft 16 that penetrates the central portion of the bottom wall portion 15B in a watertight state and slidably in the axial direction is formed in the bottom wall portion 15B of the closed bottomed cylindrical closure case 15; A second operating shaft 17 that slidably passes through the first operating shaft 16 in the axial direction is provided, and the inner ends of the first operating shaft 16 and the second operating shaft 17 are provided in the branch pipe section 2. A closing means C for blocking the flow path W is provided, and an operating means D for operating the closing means C from the outside via both operating shafts 16 and 17 is provided.

  As shown in FIG. 5, a first pressing plate 18 having an annular pressing surface 18a is externally fitted and fixed to the inner end of the first operating shaft 16, as shown in FIG. A second pressing plate 19 having an annular pressing surface 19a facing the pressing surface 18a of the first pressing plate 18 in the axial direction is externally fitted on the inner end side of the shaft 17, and the both Between the pressing surfaces 18 a and 19 a of the pressing plates 18 and 19, the inner peripheral wall surface is elastically deformed into a diameter-expanded state in close contact with the inner peripheral wall surface of the branch pipe portion 2 by the clamping force from the axial direction. A rubber diameter-expanding elastic body 20 that closes between the outer peripheral portions of the pressing plates 18 and 19, that is, blocks the flow path W, is externally provided.

  The operation means D includes an operation screw member 22 that can abut on an outer end portion of the first operation shaft 16 via a thrust bearing 21 on a screw shaft portion formed on the outer end side of the second operation shaft 17. It is configured by screwing.

  When the operation screw member 22 is screwed to the tightening side, as shown in FIG. 6, the first operation shaft 16 is pushed and slid to the inner end side with respect to the second operation shaft 17, and the second pressing plate The diameter-expanding elastic body 20 in an uncompressed state is in close contact with the inner peripheral wall surface of the branch pipe portion 2 due to the clamping action accompanying the proximity movement of the pressing surface 18a of the first pressing plate 18 with respect to the 19 pressing surface 19a. The flow path W in the branch pipe part 2 can be interrupted in a watertight (sealed) state by being elastically deformed to a state.

  Further, as shown in FIG. 5, a first presser operating bar 24 is detachably fitted and held on the outer end of the first operating shaft 16, and the first presser operating bar 24 has a second operation. The second presser operating rod 25 that is detachably fitted to the outer end of the shaft 17 can be engaged and disengaged. In the engaged state, the second operating shaft 17 with respect to the first operating shaft 16 resists water pressure. The first locking ring 26 that prevents sliding toward the outer end side and the pair of L-shaped locking pieces 27 fixed to the bottom wall portion 15B of the closing case 15 can be engaged and disengaged freely. In the combined state, a second locking ring 28 is provided that prevents sliding of the first operating shaft 16 to the outer end side with respect to the closing case 15 against water pressure.

  Further, the positional relationship between the operating shafts 16 and 17 in the axial direction is regulated by the first locking ring 26, and in this state, the opposing distance between the pressing plates 18 and 19 is the elastic body 20 for expanding the diameter. Is not compressed or is set at an interval close thereto, the diameter-enlarging elastic body 20 is maintained in a reduced diameter state.

  The drain pipe 29 connected to the peripheral wall biased toward the bottom wall portion 15B of the closing case 15 determines whether or not the flow path W in the branch pipe portion 2 is completely blocked by the closing means C depending on whether water is discharged or not. A faucet 30 having an opening / closing operation lever 30A for confirmation is provided.

  [5] As shown in FIG. 6, the first opening / closing valve 7 is operated to open the closing means C housed in the closing case 15 of the closing device B. Through the internal flow path of the working pipe section 6 and the insertion hole 8 formed in the pipe wall, the pipe is sent to the flow path closing position in the branch pipe section 2, and in this state, the operation screw member 22 is screwed to the tightening side, Due to the clamping action accompanying the proximity movement of the pressing surface 18a of the first pressing plate 18 to the pressing surface 19a of the second pressing plate 19, the diameter-expanding elastic body 20 in an uncompressed state is applied to the inner peripheral wall surface of the branch pipe portion 2. It is elastically deformed into an expanded diameter state in close contact, and the flow path W in the branch pipe portion 2 is blocked in a watertight (sealed) state.

  [6] As shown in FIGS. 7 and 8, after removing the old air valve 3 connected to the connecting flange portion 2A of the branch pipe portion 2, the connecting flange portion 2A of the branch pipe portion 2 In an example of a new fluid device, a connection flange portion 32A on the upstream side of the second on-off valve 32 that opens and closes the ball valve body 32D by operating the operation lever 32C is connected to a bolt 4 and a nut 5 that are examples of fasteners. In addition, the coupling flange portion 33A of the air valve 33, which is an example of a new fluid device, is connected to the coupling flange portion 32B on the downstream side of the second on-off valve 32 with a fastener in a watertight state (sealed state). Are fixedly connected in a watertight state (sealed state) via bolts 4 and nuts 5 as an example.

  [7] As shown in FIG. 9, the operating screw member 22 of the closing device B is screwed to the loose side, so that the pressing surface 18 a of the first pressing plate 18 moves away from the pressing surface 19 a of the second pressing plate 19. Due to the clamping pressure release action that accompanies the above, the elastic body 20 for expanding the diameter in the compressed state is elastically returned to the reduced diameter side to the non-compressed state or a state close thereto, and the blocking of the flow path W in the branch pipe portion 2 is released .

  Next, the closing means C of the closing device B at the flow path closing position in the branch pipe section 2 is connected to the insertion hole 8 of the pipe wall, the internal flow path of the working pipe section 6, and the internal flow of the first on-off valve 7. After drawing out into the closing case 15 through the passage, the closing device B is removed while the first opening / closing valve 7 is closed, and the connecting flange portion on the downstream side of the first opening / closing valve 7 from which the closing device B has been removed A lid 34 for sealing the downstream opening of the first on-off valve 7 is fixedly connected to 7B in a watertight state (sealed state) via a bolt 4 and a nut 5 which are examples of fasteners.

  In the above-described first embodiment, the fluid device renewal method has been mainly described. However, the branch pipe section blocking method includes the steps [1] to [5] described above, and in particular, this branch pipe. In the part shutoff method, when it becomes necessary to replace the fluid equipment or branch pipe in the fluid piping system that has reached the end of life or where water leakage or failure has occurred with a new designated fluid equipment or branch pipe, or This can be suitably carried out when it is necessary to repair water leakage that has occurred in the branch pipe portion 2 of the water pipe 1.

  And the working pipe part 6 is projectedly provided on the pipe wall of the water pipe 1 which is concentrically or substantially concentrically opposed to the proximal end opening 2a of the branch pipe part 2, and the working pipe part 6 By forming the insertion port 8 with the piercing device A connected via the first on-off valve 7, the closing means C of the closing device B inserted through the insertion port 8 from the proximal end opening 2 a side. Thus, the flow path W of the branch pipe portion 2 can be reliably closed (blocked) on the base end opening 2a side.

  Therefore, for example, even in a situation where no on-off valve is interposed between the branch pipe portion 2 and the fluid device, or even under a condition where the branch pipe portion 2 of the water pipe 1 is bent or curved, The flow path blocking operation of the pipe part 2 can be performed efficiently, reliably and easily in a state without water leakage, and can be advantageously performed in terms of construction cost.

  In the first embodiment described above, the method for updating the fluid device such as the air valve and the on-off valve has been described. As shown in FIG. 24, the branch pipe connected to the branch pipe portion 2 of the water pipe 1 is used. 40 can be suitably implemented also in the method of updating the water supply state (fluid transport) in the water pipe 1 while maintaining the undisturbed water state.

[Second Embodiment]
In the first embodiment of the fluid device renewal method and the branch pipe section blocking method described above, the renewal operation is completed while the first on-off valve 7 is fixedly connected to the branch pipe section 2 of the water pipe 1. 8 and subsequent steps may be changed to the steps shown in FIGS. 10 to 14, and the first on-off valve 7 may be removed from the work pipe portion 6 of the water pipe 1.

[8] As shown in FIG. 10, after removing the old air valve 3 connected to the connecting flange portion 2A of the branch pipe portion 2, a new fluid is added to the connecting flange portion 2A of the branch pipe portion 2. After the connection flange portion 32A on the upstream side of the second on-off valve 32 which is in the closed state in an example of the device is fixedly connected in a watertight state (sealed state) via the bolt 4 and the nut 5 which are examples of fasteners, The operating screw member 22 of the closing device B is screwed to the loose side, and the compressed state is caused by the clamping pressure release action accompanying the separation movement of the pressing surface 18a of the first pressing plate 18 with respect to the pressing surface 19a of the second pressing plate 19. The elastic body 20 for expanding the diameter is elastically returned to the reduced diameter side until it is in an uncompressed state or a state close thereto, and the blocking of the flow path W in the branch pipe portion 2 is released.
Next, the closing means C of the closing device B at the flow path closing position in the branch pipe section 2 is connected to the insertion hole 8 of the pipe wall, the internal flow path of the working pipe section 6, and the internal flow of the first on-off valve 7. After pulling out into the closing case 15 through the path, the closing device B is removed with the first on-off valve 7 being closed.

  [9] As shown in FIG. 11, the connection flange portion 15 </ b> A of the closing device B removed from the connection flange portion 32 </ b> B on the downstream side of the second on-off valve 32 is replaced with a bolt 4 and a nut 5, which are an example of a fastener. And fixedly connected in a watertight state (sealed state).

  [10] As shown in FIG. 12, after operating the operation lever 32C of the second on-off valve 32 to open the ball valve body 32D, the occlusion stored in the occlusion case 15 of the occlusion device B The means C is sent to the flow path closing position in the working pipe section 6 through the internal flow path W of the branch pipe section 2 and the insertion hole 8 formed in the pipe wall, and in this state, the operation screw member 22 is screwed to the tightening side. By operating the joint, the diameter expansion elastic body 20 in the non-compressed state is moved to the working tube portion 6 by the clamping action accompanying the proximity movement of the pressing surface 18a of the first pressing plate 18 to the pressing surface 19a of the second pressing plate 19. It is elastically deformed into a diameter-expanded state in close contact with the inner peripheral wall surface, and the flow path in the working tube portion 6 is shielded in a watertight (sealed) state.

  [11] As shown in FIG. 13, after removing the first on-off valve 7 connected to the connecting flange portion 6B of the working tube portion 6, the connecting flange portion 6B of the working tube portion 6 A lid 35 for sealing the downstream opening of the working pipe portion 6 is fixedly connected in a watertight state (sealed state) via a bolt 4 and a nut 5 which are examples of fasteners.

[12] As shown in FIGS. 13 and 14, the operating screw member 22 of the closing device B is screwed to the loose side, and the elastic body 20 for expanding the diameter in the compressed state is brought into an uncompressed state or a state close thereto. Until it is elastically restored to the reduced diameter side, and the shielding of the flow path in the working tube portion 6 is released.
Next, the closing means C of the closing device B at the position where the flow path is closed in the working pipe section 6 is connected to the insertion hole 8 of the pipe wall, the internal flow path W of the branch pipe section 2, and the inside of the second on-off valve 32. After being drawn into the closing case 15 through the flow path, the closing device B is removed with the second opening / closing valve 32 closed, and a new fluid is added to the downstream connecting flange portion 32B of the second opening / closing valve 32. The connecting flange portion 33A of the air valve 33, which is an example of a device, is fixedly connected in a watertight state (sealed state) via a bolt 4 and a nut 5 which are examples of fasteners.

In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
In the second embodiment described above, the method for updating the fluid device such as the air valve or the on-off valve has been described. However, as shown in FIG. 24, the branch pipe 40 connected to the branch pipe portion 2 of the water pipe 1. Can be suitably implemented in a method of renewing the water in a continuous water state in which water supply (fluid transport) is maintained in the water pipe 1.

[Third Embodiment]
In the first embodiment and the second embodiment described above, the base plate portion of the working pipe portion 6 is integrally provided with the contact plate portion 6A that is curved with the same curvature as the outer peripheral surface of the pipe wall of the water pipe 1. The outer peripheral area of the backing plate 6A applied from the radially outer side along the pipe wall outer peripheral surface of the water pipe 1 is configured to be fixed to the pipe wall outer peripheral surface of the water pipe 1 by welding. As shown in FIGS. 15 to 19, an elastic sealing material is interposed at the base end portion of the working pipe portion 6 from the lower side which is one side in the radial direction with respect to the outer peripheral surface of the pipe wall of the water pipe 1. An arcuate mounting plate 38 that is applied in a state of being attached may be provided continuously, and fastening means 39 may be provided to fasten and fix the arcuate mounting plate 38 to the outer peripheral surface of the pipe wall in a watertight state.

  The fastening means 39 has a pair of U-shaped bolts 39A applied from the upper side which is the other side in the radial direction with respect to the outer peripheral surface of the pipe wall of the water pipe 1, and both ends of each U-shaped bolt 39A. Of the formed screw shaft portion 39a, a fastening nut 39B that is screwed into a screw shaft portion that is inserted into a mounting hole formed in a connecting flange portion 38A at both ends in the circumferential direction of the arc-shaped mounting plate 38. Has been.

  The fluid device updating method and the branch pipe section blocking method used in the third embodiment will be briefly described below. The following steps [13] to [16] are included.

  [13] As shown in FIGS. 15 and 16, an arcuate mounting plate 38 connected to the outer peripheral surface of the pipe wall 1 of the water pipe 1 and connected to the base end of the working pipe 6 is elastically sealed to the inner surface thereof. The pipe core X of the water pipe 1 is applied to the proximal end opening 2a of the branch pipe portion 2 by the U-shaped bolt 39A and the fastening nut 39B constituting the fastening means 39 while being applied with the material interposed. The arc-shaped mounting plate 38 is connected to the water pipe in a state where the working pipe portion 6 projects radially outward in a concentric or substantially concentric state with the branch pipe portion 2 at a portion opposed to each other in the radial direction across the wall. 1 is fastened and fixed to the outer peripheral surface of the tube wall in a watertight state (sealed state).

  [14] As shown in FIG. 17, the connecting flange portion 6B of the working pipe portion 6 is connected to a connecting flange portion 7A on the upstream side of a new first on-off valve (repair valve) 7 which is an example of a fluid device. A water pipe is fixedly connected via a bolt 4 and a nut 5, and a water pipe is connected to a connecting flange portion 7 B on the downstream side of the first on-off valve 7 through the inside of the first on-off valve 7 and the work pipe portion 6. A connecting flange portion 13A of a drilling apparatus A provided with a tip punching tool 9 capable of drilling an insertion port 8 in one tube wall is fixedly connected in a watertight state via bolts 4 and nuts 5.

  Next, after operating the operation lever 7D of the first on-off valve 7 to open the ball valve body 7C, the first on-off valve 7 and the work are operated while the driving rotary shaft 10 of the punching device A is driven to rotate. By feeding the distal end punch 9 through the inside of the pipe part 6 to the pipe wall side of the water pipe 1, the branch pipe part 2 and the pipe wall of the water pipe 1 corresponding to the proximal end opening of the work pipe part 6 The insertion port 8 is drilled in a concentric or substantially concentric state.

  When the drilling operation by the punching device A is completed, the tip punching tool 9 of the punching device A is pulled into the storage space 12 of the connection case 13, and then the first on-off valve 7 is closed and the first on-off valve is closed. 7 removes the drilling device A.

  [15] As shown in FIG. 18, the downstream connecting flange portion 7B of the first on-off valve 7 from which the punching device A has been removed is provided with a closing means C that can close the flow path W in the branch pipe portion 2. The connecting flange portion 15A of the closing device B is fixedly connected in a watertight state via the bolt 4 and the nut 5.

  By opening the first on-off valve 7, the closing means C housed in the closing case 15 of the closing device B is changed into an internal flow path of the first on-off valve 7, an internal flow path of the working pipe section 6, Through the insertion hole 8 formed in the tube wall, the air is sent to the flow path blocking position in the branch pipe portion 2 to shield the flow path W in the branch pipe portion 2 in a watertight state.

  [16] As shown in FIG. 19, after removing the old air valve 3 connected to the connecting flange portion 2A of the branch pipe portion 2, a new fluid is added to the connecting flange portion 2A of the branch pipe portion 2. A second on-off valve 32 and an air valve 33, which are examples of equipment, are fixedly connected in a watertight state via bolts 4 and nuts 5, respectively.

  Next, the elastic body 20 for expanding the diameter of the closing device B is elastically returned to the reduced diameter side to an uncompressed state or a state close thereto, and after the shielding of the flow path W in the branch pipe portion 2 is released, the branching is performed. The closing means C of the closing device B at the flow path closing position in the pipe part 2 is passed through the insertion hole 8 of the pipe wall, the internal flow path of the working pipe part 6, and the internal flow path of the first on-off valve 7. After being pulled out, the closing device B is removed while the first opening / closing valve 7 is closed, and the connecting flange portion 7B on the downstream side of the first opening / closing valve 7 from which the closing device B has been removed includes A lid 34 for sealing the downstream opening of the 1 on-off valve 7 is fixedly connected in a watertight state via bolts 4 and nuts 5.

In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
Moreover, in the above-mentioned 3rd Embodiment, although the update work was complete | finished with the 1st on-off valve 7 being fixedly connected with the branch pipe part 2 of the said water pipe 1, FIG. 10-FIG. 14 demonstrated in 2nd Embodiment. In addition, the first on-off valve 7 may be removed from the work pipe portion 6 of the water pipe 1 by adding the process shown in FIG.
Furthermore, in the above-described third embodiment, the method for renewing a fluid device such as an air valve or an on-off valve has been described. As shown in FIG. 24, a branch pipe connected to the branch pipe portion 2 of the water pipe 1 is used. 40 can also be suitably implemented in a method of renewing while maintaining fluid transportation in the water pipe 1.

[Fourth Embodiment]
In each above-mentioned embodiment, although the branch pipe part 2 of the said water pipe 1 protruded in the straight line shape toward radial direction outward, as shown to FIGS. 20-23, the branch pipe part of the said water pipe 1 is provided. 2 can be applied to the fluid device renewal method and the branch pipe portion blocking method of the present invention even in a branch connection structure that is curved in an L shape protruding along the tangential direction of the water pipe 1. it can.
That is, the fluid device updating method and the branch pipe section blocking method include the following steps [17] to [20].

  [17] As shown in FIG. 20, the outer peripheral surface of the pipe wall of the water pipe 1 is opposed to the proximal end opening 2 a of the branch pipe portion 2 in a substantially tangential direction (horizontal direction) of the water pipe 1. A linear working tube portion 6 having the same inner diameter as that of the branch tube portion 2 is provided at a site so as to project radially outward in a concentric or substantially concentric state with the branch tube portion 2.

  A base plate portion of the working pipe portion 6 is integrally provided with a contact plate portion 6A that is curved and formed with the same curvature as the outer peripheral surface of the pipe wall of the water pipe 1. The work pipe part 6 with respect to the pipe wall of the water pipe 1 is secured to the outer peripheral surface of the pipe wall 1 by welding the entire outer peripheral edge of the backing plate part 6A applied along the outer side in the radial direction. Is installed in a watertight state.

  [18] As shown in FIG. 21, a connecting flange portion 7A upstream of a new first on-off valve (repair valve) 7, which is an example of a fluid device, is connected to the connecting flange portion 6B of the working pipe portion 6. A water pipe is fixedly connected via a bolt 4 and a nut 5, and a water pipe is connected to a connecting flange portion 7 B on the downstream side of the first on-off valve 7 through the inside of the first on-off valve 7 and the work pipe portion 6. A connecting flange portion 13A of a drilling apparatus A provided with a tip punching tool 9 capable of drilling an insertion port 8 in one tube wall is fixedly connected in a watertight state via bolts 4 and nuts 5.

  Next, after operating the operation lever 7D of the first on-off valve 7 to open the ball valve body 7C, the first on-off valve 7 and the work are operated while the driving rotary shaft 10 of the punching device A is driven to rotate. By feeding the distal end punch 9 through the inside of the pipe part 6 to the pipe wall side of the water pipe 1, the branch pipe part 2 and the pipe wall of the water pipe 1 corresponding to the proximal end opening of the work pipe part 6 The insertion port 8 is drilled from a substantially tangential direction in a concentric or substantially concentric state.

  When the drilling operation by the punching device A is completed, the tip punching tool 9 of the punching device A is pulled into the storage space 12 of the connection case 13, and then the first on-off valve 7 is closed and the first on-off valve is closed. 7 removes the drilling device A.

  [19] As shown in FIG. 22, a closing device provided with closing means C capable of closing the flow path of the branch pipe portion 2 at the downstream connection flange portion 7B of the first on-off valve 7 from which the punching device A has been removed. The connecting flange portion 15A of B is fixedly connected in a watertight state via the bolt 4 and the nut 5.

  By opening the first on-off valve 7, the closing means C housed in the closing case 15 of the closing device B is changed into an internal flow path of the first on-off valve 7, an internal flow path of the working pipe section 6, Through the insertion hole 8 formed in the tube wall, the air is sent to the flow path blocking position in the branch pipe portion 2 to shield the flow path W in the branch pipe portion 2 in a watertight state.

  [20] As shown in FIG. 23, after the old air valve 3 connected to the connecting flange portion 2A of the branch pipe portion 2 is removed, a new fluid is added to the connecting flange portion 2A of the branch pipe portion 2. A second on-off valve 32 and an air valve 33, which are examples of equipment, are fixedly connected in a watertight state via bolts 4 and nuts 5, respectively.

Next, the elastic body 20 for expanding the diameter of the closing device B is elastically returned to the reduced diameter side to an uncompressed state or a state close thereto, and after the shielding of the flow path W in the branch pipe portion 2 is released, the branching is performed. The closing means C of the closing device B at the flow path closing position in the pipe part 2 is passed through the insertion hole 8 of the pipe wall, the internal flow path of the working pipe part 6, and the internal flow path of the first on-off valve 7. After being pulled out, the closing device B is removed while the first opening / closing valve 7 is closed, and the connecting flange portion 7B on the downstream side of the first opening / closing valve 7 from which the closing device B has been removed includes A lid 34 for sealing the downstream opening of the 1 on-off valve 7 is fixedly connected in a watertight state via bolts 4 and nuts 5.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

  Moreover, although the above-mentioned 4th Embodiment demonstrated the update method of fluid apparatuses, such as an air valve and an on-off valve, the branch pipe connected to the branch pipe part 2 of the said water pipe 1 is replaced with the water pipe 1. It can also be suitably implemented in a method of renewing while maintaining fluid transportation.

[Fifth Embodiment]
As shown in FIG. 24, a connecting flange portion of a linear branch pipe portion 2 integrally formed projecting radially outward in the middle of a water pipe 1 which is an example of a fluid pipe constituting a fluid piping system. (Example of connecting part) A connecting flange part (an example of connecting part) 40A formed on the upstream end (lower end side end) of the branch pipe 40 in 2A is an example of a fastener. In the branch connection structure that is detachably connected in a sealed state through a detachable, the above-mentioned reasons for the durable years and the change of the fluid piping system, etc. while maintaining the flow of clean water in the water pipe 1 A branch pipe removing method for removing the branch pipe 40 and a branch pipe section blocking method used in the method, which include the following steps [21] to [24].

  [21] As shown in FIG. 25, relative to the outer peripheral surface of the pipe wall of the water pipe 1 with respect to the proximal end opening 2 a of the branch pipe portion 2 in the radial direction with the pipe axis X of the water pipe 1 sandwiched therebetween. A straight working tube portion 6 having the same inner diameter as that of the branch tube portion 2 is protruded radially outwardly in a concentric or substantially concentric state with the branch tube portion 2.

  A base plate portion of the working pipe portion 6 is integrally provided with a contact plate portion 6A that is curved and formed with the same curvature as the outer peripheral surface of the pipe wall of the water pipe 1. The work pipe part 6 with respect to the pipe wall of the water pipe 1 is secured to the outer peripheral surface of the pipe wall 1 by welding the entire outer peripheral edge of the backing plate part 6A applied along the outer side in the radial direction. Is installed in a watertight state.

  The connection flange portion 6B of the work pipe portion 6 is connected to a connection flange portion 7A on the upstream side of a new first on-off valve (repair valve) 7 which is an example of a fluid device through a bolt 4 and a nut 5 in a watertight manner. Connect in a fixed state.

  [22] As shown in FIG. 26, the connecting flange portion 7B on the downstream side of the first on-off valve 7 is inserted into the pipe wall of the water pipe 1 through the inside of the first on-off valve 7 and the working pipe portion 6. The connecting flange portion 13A of the punching device A provided with the tip punching tool 9 capable of punching the opening 8 is fixedly connected in a watertight state via the bolt 4 and the nut 5.

  Next, after operating the operation lever 7D of the first on-off valve 7 to open the ball valve body 7C, the first on-off valve 7 and the work are operated while the driving rotary shaft 10 of the punching device A is driven to rotate. By feeding the distal end punch 9 through the inside of the pipe part 6 to the pipe wall side of the water pipe 1, the branch pipe part 2 and the pipe wall of the water pipe 1 corresponding to the proximal end opening of the work pipe part 6 The insertion port 8 is pierced from the radial direction in a concentric or substantially concentric state.

  When the drilling operation by the punching device A is completed, the tip punching tool 9 of the punching device A is pulled into the storage space 12 of the connection case 13, and then the first on-off valve 7 is closed and the first on-off valve is closed. 7 removes the drilling device A.

  [23] As shown in FIGS. 27 and 28, the downstream connecting flange portion 7B of the first on-off valve 7 from which the punching device A has been removed is provided with a closing means C that can close the flow path of the branch pipe portion 2. The connecting flange portion 15A of the closing device B is fixedly connected in a watertight state via the bolt 4 and the nut 5.

  By opening the first on-off valve 7, the closing means C housed in the closing case 15 of the closing device B is changed into an internal flow path of the first on-off valve 7, an internal flow path of the working pipe section 6, Through the insertion hole 8 formed in the pipe wall, the pipe is sent to the flow path closing position in the branch pipe part 2, the flow path W in the branch pipe part 2 is shielded in a watertight state, and is connected to the connecting flange part 2 A of the branch pipe part 2. The connected branch pipe 40 is removed.

  [24] As shown in FIGS. 29 and 30, a lid 34 for sealing the downstream opening of the branch pipe part 2 is attached to the connecting flange part 2 </ b> A of the branch pipe part 2 via bolts 4 and nuts 5. After the fixed connection in a watertight state, the diameter-enlarging elastic body 20 of the closing device B is elastically returned to the reduced diameter side to the non-compressed state or a state close thereto, and the flow path W in the branch pipe portion 2 is shielded. After the release, the closing means C of the closing device B at the flow path closing position in the branch pipe part 2 is changed to the insertion hole 8 of the pipe wall, the internal flow path of the working pipe part 6, the inside of the first on-off valve 7. After drawing out into the closing case 15 through the flow path, the closing device B is removed while the first opening / closing valve 7 is closed, and the connecting flange on the downstream side of the first opening / closing valve 7 from which the closing device B has been removed. The part 7B is provided with a lid 34 for sealing the downstream opening of the first on-off valve 7 with the bolt 4 Fixedly connected in a watertight state via the nut 5.

In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
In the fifth embodiment described above, the branch pipe 40 connected to the branch pipe portion 2 of the water pipe 1 is removed in an undisturbed water state in which water supply transportation (fluid transportation) is maintained in the water pipe 1. However, the present invention can also be suitably implemented in a method of removing fluid devices such as air valves and on-off valves while maintaining water supply (fluid transport) in the water pipe 1 in an undisturbed water state.

[Sixth Embodiment]
In the fifth embodiment described above, the base plate portion of the working pipe portion 6 is integrally provided with the contact plate portion 6A that is curved and formed with the same curvature as the outer peripheral surface of the pipe wall of the water pipe 1. The entire outer peripheral edge of the backing plate 6A applied from the outside in the radial direction along the outer peripheral surface of the pipe wall is fixed to the outer peripheral surface of the pipe wall of the water pipe 1 by welding. As shown in FIG. 2, the elastic pipe is applied to the base end of the working pipe 6 with an elastic sealing material interposed from the lower side, which is one side in the radial direction, with respect to the outer peripheral surface of the pipe wall 1. The arcuate mounting plate 38 may be provided continuously, and fastening means 39 may be provided to fasten and fix the arcuate mounting plate 38 to the outer peripheral surface of the pipe wall 1 in a watertight state.

The fastening means 39 has a pair of U-shaped bolts 39A applied from the upper side which is the other side in the radial direction with respect to the outer peripheral surface of the pipe wall of the water pipe 1, and both ends of each U-shaped bolt 39A. Of the formed screw shaft portion 39a, a fastening nut 39B that is screwed into a screw shaft portion that is inserted into a mounting hole formed in a connecting flange portion 38A at both ends in the circumferential direction of the arc-shaped mounting plate 38. Has been.
In addition, since the other structure is the same as the structure demonstrated in 5th Embodiment, the same number is attached to the same component location as 5th Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In the first embodiment described above, the fluid piping system in which the branch pipe portion 2 is integrally formed in the middle of the fluid pipe 1 such as a water pipe has been described, but the fluid pipe 1 is provided along the circumferential direction thereof. And a branch pipe portion 2 that protrudes from the pipe radial direction with respect to a through-hole formed in the fluid pipe 1 in one split joint body. The method of the present invention can also be applied to a branch connection structure in which a certain pipe joint is mounted.

The partially cutaway side view which shows 1st Embodiment of the fluid apparatus update method and branch pipe part interruption | blocking method of this invention Partially cutaway side view when working pipes are connected continuously Partially cutaway side view when the first on-off valve and the punching device are connected to the working pipe. Partial cutaway side view when drilling with a drilling device Sectional side view when the closing device is connected to the first on-off valve Cross-sectional side view when the flow path of the branch pipe is closed with a closing device Cross-sectional side view when the old air valve is removed from the branch pipe Sectional side view when a new second on-off valve and air valve are connected Side view after renewal Sectional side view when 2nd Embodiment of the fluid apparatus renewal method and branch pipe part interruption | blocking method of this invention are shown, and the 2nd on-off valve is connected to the branch pipe part Sectional side view when the closing device is connected to the second on-off valve Cross-sectional side view when the flow path of the working tube is closed Cross-sectional side view when the first on-off valve is removed Cross-sectional side view when the occlusion device is removed and a new air valve is connected The side view when showing the 3rd embodiment of the fluid equipment renewal method of the present invention, and the branch pipe part interception method, and has arranged the work pipe part continuously Sectional front view when working pipes are connected Sectional side view when the closing device is connected to the first on-off valve Cross-sectional side view when the flow path of the branch pipe is closed with a closing device Cross-sectional side view when the closure device is removed and a new second on-off valve and air valve are connected Sectional front view when 4th embodiment of the fluid apparatus renewal method and branch pipe part interruption | blocking method of this invention are shown, and the work pipe part is arranged continuously Partial cutaway side view when drilling with a drilling device Cross-sectional side view when the flow path of the branch pipe is closed with a closing device Cross-sectional front view when the old air valve is removed from the branch pipe and a new second on-off valve and air valve are connected The 5th Embodiment of the branch pipe removal method and branch pipe part interruption | blocking method of this invention are shown, and the side view before construction Partially cutaway side view when the first on-off valve is connected to the working pipe Partial cutaway side view when drilling with a drilling device Cross-sectional side view when the flow path of the branch pipe is closed with a closing device Cross-sectional side view when the branch pipe is removed Cross-sectional side view when the lid is connected to the branch pipe Side view when the closure device is removed and the lid is connected to the first on-off valve The side view when the branch pipe removal method and the branch pipe section blocking method of the present invention are shown in the sixth embodiment and the working pipe sections are connected. Side view after removal of branch pipe

Explanation of symbols

A punching device B closing device C closing means 1 fluid pipe (water pipe)
2 Branch pipe part 2a Base end opening 3 Fluid equipment (air valve)
6 Working pipe portion 6A Batter plate portion 7 First on-off valve 8 Insertion port 9 Tip punch 32 Second on-off valve 33 Fluid device (air valve)
34 Lid 35 Lid 38 Arc-shaped mounting plate 39 Fastening means 40 Branch pipe

Claims (6)

A fluid equipment / branch pipe updating method for a fluid piping system in which a fluid device or a branch pipe connected to a branch pipe portion of a fluid pipe is updated while maintaining fluid transportation in the fluid pipe. The step 3) is provided.
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) Pull the distal end punching tool of the perforating device downstream from the first on-off valve, and after removing the perforating device in a state where the first on-off valve is closed, A closing device having closing means capable of closing the flow path is connected, and the closing means of the closing device is connected to the flow closing position in the branch pipe portion through the first opening / closing valve, the working tube portion and the insertion port of the tube wall. Feed in to close the flow path.
3) After removing the old fluid device or branch pipe connected to the branch pipe portion, a new fluid device or branch pipe is connected to the branch pipe portion, and the closing means of the closing device is first opened and closed. After drawing out downstream from the valve, the closing device is removed with the first on-off valve closed. A fluid equipment / branch pipe renewal method of a fluid piping system for renewing a fluid equipment or a branch pipe connected to a straight branch pipe portion of a fluid pipe while maintaining fluid transportation in the fluid pipe. It comprises the steps 1) to 5).
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) Pull the distal end punching tool of the punching device downstream from the first on-off valve, remove the punching device with the first on-off valve closed, and then connect the flow of the branch pipe section to the first on-off valve. A closing device having a closing means capable of closing the passage is connected, and the closing means of this closing device is sent to the flow path closing position in the branch pipe portion through the first opening / closing valve, the working tube portion and the insertion port of the tube wall. Close the flow path with.
3) After removing the old fluid device or branch pipe connected to the branch pipe section, a second on-off valve is connected to the branch pipe section, and the closing means of the closing device is made to be more than the first on-off valve. After drawing out to the downstream side, the closing device is removed with the first on-off valve closed.
4) A closing device is connected to the opening / closing valve on the branch pipe portion side, and the closing means of the closing device is connected to the flow passage closing position in the working pipe portion through the second opening / closing valve, the branch pipe portion and the insertion port of the tube wall. After feeding in and closing the flow path, the first on-off valve is removed from the working tube.
5) Next, a lid for sealing the end opening of the working pipe is connected to the working pipe, and the closing means of the closing device is drawn downstream from the second opening / closing valve to open and close the branch pipe. While the valve is closed, the closing device is removed, and a new fluid device or branch pipe is connected to the second on-off valve.   The fluid pipe / fluid pipe renewal method for a fluid piping system according to claim 1, wherein a contact plate portion fixed to the outer peripheral surface of the fluid pipe is connected to the working pipe portion.   An arcuate mounting plate that is applied from one side in the radial direction to the pipe wall outer peripheral surface of the fluid pipe is connected to the working pipe portion, and the arcuate mounting plate is connected to the pipe wall outer periphery of the fluid pipe. The fluid piping / branch pipe updating method for a fluid piping system according to any one of claims 1 to 3, wherein fastening means for fastening and fixing to a surface is provided. A branch pipe / fluid device removal method for a fluid piping system in which a branch pipe or a fluid device connected to a branch pipe portion of a fluid pipe is removed while maintaining fluid transportation in the fluid pipe. The step 3) is provided.
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) After removing the piercing device with the first on-off valve closed, the first on-off valve is connected to a closing device having a closing means capable of closing the flow path of the branch pipe portion. The closing means is sent through the first on-off valve, the working pipe section and the insertion opening of the pipe wall to the flow path closing position in the branch pipe section to close the flow path.
3) After removing the branch pipe or the fluid device connected to the branch pipe part, the lid for sealing the end opening of the branch pipe part is connected to the branch pipe part, and the closing means of the closing device is the first. After drawing out to the downstream side of the on-off valve, the closing device is removed with the first on-off valve closed. A branch pipe section blocking method for a fluid piping system that blocks a flow path of a branch pipe section of a fluid pipe while maintaining fluid transportation in the fluid pipe, and includes the following steps 1) and 2): It is characterized by.
1) A working tube portion that is concentrically or substantially concentrically opposed to the proximal end opening of the branch tube portion is provided on the tube wall of the fluid tube so as to be connected to the working tube portion. A pipe wall of a fluid pipe facing the base end opening of the branch pipe part by connecting a perforating apparatus to the one on-off valve and feeding the tip punching tool of the perforating apparatus through the first on-off valve and the working pipe part Perforate the insertion opening.
2) Pull out the tip piercing tool of the piercing device downstream from the first on-off valve, remove the piercing device with the first on-off valve closed, and then connect the first on-off valve to the flow of the branch pipe section. A closing device having a closing means capable of closing the passage is connected, and the closing means of this closing device is sent to the flow path closing position in the branch pipe portion through the first opening / closing valve, the working tube portion and the insertion port of the tube wall. Close the flow path with.

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