JP6209487B2 - Pressure tube repair tool and pressure tube repair method - Google Patents

Description

  In the present invention, when repairing a damaged portion in a pipe for feeding a pressurized body pressurized to a high pressure in a laid pipe, the pressure body existing in the pipe is extracted prior to the repair work. The present invention relates to a pressure tube repair tool and a pressure tube repair method.

  Conventionally, in order to repair damaged parts in pipes such as tap water, sewage or can water that has been subjected to high pressure, or industrial exhaust pipes, repair tools for extracting water in pipes that are subject to high pressure in advance Repair methods have been proposed, and various repair tools and repair methods have been used at individual construction sites.

  And the same applicant invented the damaged part sealing band in a pipe | tube in Unexamined-Japanese-Patent No. 2014-589995 as one proposal, and disclosed the content concretely.

JP 2014-58995 A

  That is, after covering the inner surface of the drainage pipe or the like of the part having the damaged part, to form the screw hole in each of the three damaged part sealing bands and the driving wedge to be surely fixed to the inner surface of the drainage pipe or the like, By attaching an anchor bolt to this screw hole and tightening, it is difficult to cause a positional shift and is firmly fixed.

  On the other hand, prior to such repair work, the high pressure member and the like must be removed. In an apparatus related to extraction of a high-pressure member that has been conventionally used, such a preliminary measure is taken against what is assumed in advance. However, in many cases, such extraction equipment is not set for large pipes or the like for which repair and inspection are not frequently required.

  For such a device or a feeding pipe, an extraction method such as depressurization of a pressurizing body such as a liquid is required in order to deal with the situation at that time, and the present invention is thus In response to various demands, we propose a pressure tube repair tool and a pressure tube repair method that are as versatile as possible.

  That is, using the manhole in the repair section in advance, after closing the upstream side and the downstream side in the pipe containing the manhole, by removing the pressurized body to which the high pressure in this section is applied, in that section It is an object of the present invention to provide a pressure tube repair tool and a pressure tube repair method capable of performing repair work safely and efficiently.

In order to achieve the above object, according to the first aspect of the present invention, in the pressure tube repair tool for drilling the substrate fixed to the pressure tube, the pressure tube is extended and attached outward from the pressure tube. A hollow extension tube having a flange portion; an open / close ball valve attached to the flange portion to form a concentric hollow portion; and a second extension attached to an outer flange portion of the open / close ball valve to form a concentric hollow portion. A pipe, a mounting base on which the second extension pipe is installed in a fixed portion, and abutting against the substrate while being guided by a hollow portion of the extension pipe that is attached by extending outward from the pressure pipe a cylindrical tube having a perforated metal bit along the circumferential surface of the tip is a cylindrical tube for extension to be connected to the cylindrical tube while being guided by said hollow portion of the second extension tube, contact at the top A motor that drives the cylindrical tube, a guide post that holds the motor movably in the vertical direction and is fixed to the mounting base, a shaft that is integrally attached to the substrate in the cylindrical tube, and the shaft Is supported in the cylindrical tube and is supported in the cylindrical tube, a universal joint formed in a part of the shaft, and supported by the upper end of the shaft and interposed between the bearings and the shaft. And a spring for applying an extension force to the cylinder, and the cylinder tube is rotated by driving the motor to cut the substrate by the perforated metal bit, and a part of the cut substrate is pulled upward by the spring. Thus, it is possible to provide a pressure tube repair tool characterized by being configured as described above.

  According to a second aspect of the present invention, in the pressurization tube repair tool for punching the substrate fixed to the pressurization tube, the hollow portion is attached to the substrate by extending outward from the pressurization tube. An extension pipe, a discharge pipe connected to the extension pipe, a cylindrical pipe having a perforated metal bit along the circumferential surface of the tip, which is arranged in contact with the substrate while being guided by a hollow portion of the extension pipe A motor for driving the cylindrical tube, and the cylindrical tube is rotated by driving the motor to cut and cut the substrate with the perforated metal bit so as to discharge the pressurized body in the pressurized tube. It is possible to provide a pressurizing tube repairing device characterized in that it is configured as described above.

  Furthermore, according to the invention described in claim 3, in the pressurizing pipe repairing method using the pressurizing pipe repairing tool for punching the substrate fixed to the pressurizing pipe, it is attached by extending outward from the pressurizing pipe. A hollow extension tube and an open / close ball valve formed with a concentric hollow portion and a second extension tube formed with a concentric hollow portion are attached to a mounting base installed on the fixed portion, along the guide post attached to the fixed portion. The cylindrical tube arranged so as to contact the substrate while being guided by the hollow portion of the extension tube is operated by the drive motor that moves, and the substrate is formed by the perforated metal bit configured along the circumferential surface of the tip. The shaft that is integrally attached to the substrate in the cylindrical tube is cut by the compression spring interposed between the bearing supported in the cylindrical tube and the upper end of the shaft. A pressurizing pipe repairing tool configured to pull up a part of the cylindrical pipe, and after cutting the substrate with the perforated metal bit, the cylindrical pipe is pulled up halfway and the cylindrical pipe is closed with the open / close ball valve closed. Pulling upward, connecting the discharge pipe to the upper extension pipe, and then opening the open / close ball valve to discharge the pressurization body in the pressurization pipe so that the pressure pipe can be repaired. Can provide a method.

  Furthermore, according to the invention described in claim 4, in the pressurization pipe repair method using the pressurization pipe repair tool for drilling the base plate fixed to the pressurization pipe, the base plate is extended outward from the pressurization pipe. An extension pipe having a hollow part, a discharge pipe connected to the extension pipe, and being arranged in contact with the substrate while being guided by the hollow part of the extension pipe, and being perforated along the circumferential surface of the tip A cylindrical pipe having a metal bit; and a motor for driving the cylindrical pipe. The cylindrical pipe is rotated by driving the motor, and the substrate is cut and cut by the drilled metal bit. A pressurizing pipe repairing method using a pressurizing pipe repairing tool configured to discharge the pressurizing body can be provided.

  According to the first aspect of the present invention, in the pressurizing tube repair tool for drilling the substrate fixed to the pressurizing tube, each cylindrical tube is rotated by driving a motor, and the substrate is cut by the drilling metal bit. It is possible to provide a pressurizing tube repairing tool characterized in that a part of the substrate is pulled upward by a spring.

  With such a configuration, when repairing a pipe that supplies pressurized fluid or the like, the pressurized fluid or the like in the pipe can be extracted prior to the repair work and the damaged part in the pipe can be safely repaired. Can provide repair tools.

  Further, according to the invention described in claim 2, since the cylindrical tube is rotated by driving the motor, the substrate is cut and cut by the perforated metal bit, and the pressurizing body in the pressurizing tube is discharged. It is possible to provide a pressure tube repair tool that can achieve the intended purpose with an extremely simple configuration.

  According to a third aspect of the present invention, in the pressurization pipe repair method using the pressurization pipe repair tool for drilling the substrate fixed to the pressurization pipe, the cylindrical tube is cut after the substrate is cut with a perforated metal bit. After pulling up halfway, with the open / close ball valve closed, pull out the cylindrical tube upward, connect the discharge tube to the upper extension tube, and then open the open / close ball valve to discharge the pressurized body in the pressure tube, It is possible to provide a pressure tube repairing method that enables repair in the pressure tube.

  Further, according to the invention described in claim 4, since the cylindrical tube is rotated by driving the motor, the substrate is cut and cut by the perforated metal bit, and the pressurizing body in the pressurizing tube is discharged. It is possible to provide a pressurizing pipe repairing method that can achieve the intended purpose using a pressurizing pipe repairing tool having an extremely simple configuration.

It is sectional drawing which shows the whole structure by one Embodiment of this invention. It is an expanded sectional view which shows the principal part of this invention in FIG. It is a perspective view from the downward direction of the motor mounting base of this invention in FIG. It is a perspective view from the upper direction of the motor mounting base of this invention in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a manhole H is generally provided in a distribution pipe such as tap water, sewage or can water subjected to high pressure, or an industrial drain pipe P. In order to measure the normal pressure of the high-pressure body, a small internal pressure measuring valve 2 is attached to the manhole H by a normal means such as a bolt and a nut. Yes. These are ordinary facilities, and the internal pressure measuring valve 2 is normally closed. If necessary, a known pressure measuring device is attached and then opened, and the pressure in the drain pipe P is measured.

  In the present invention, the extension pipe 3 is attached to the substrate 1 by welding or the like. Further, when the pressurizing body in the pipe P is repaired in the pipe damaged portion, the mounting portion is pressurized before being repaired. Since it is for extracting the pressurized body, it is attached so as to maintain airtightness. In addition, the substrate 1 may be a single body or may be a laminate of a plurality of sheets.

  A flange portion 3a is provided above the extension pipe 3, and an open / close ball valve 6 is attached thereto. The open / close ball valve 6 controls the discharge of the pressurized body from the drain pipe P discharged through the extension pipe 3. Further, a second extension pipe 7 is connected to the upper flange portion of the open / close ball valve 6 following the intermediate extension pipe. Similarly, a third extension pipe is attached if necessary. In addition, a pressure valve drain valve or the like is attached to the intermediate extension pipe as necessary. Further, the uppermost extension tube is fixed to a mounting base 10 for mounting a motor M described later.

  Cylindrical tubes 13 are fitted into hollow portions such as the extension tube 3, the open / close ball valve 6 and the second extension tube 7, and are divided into a plurality of parts as appropriate. A perforated metal bit 13 a is attached to the foremost end of the front end cylindrical tube, and the uppermost cylindrical tube is connected to the motor M. The foremost perforated metal bit 13a cuts a part of the substrate 1 so that the pressurized body can be discharged from the drain pipe P to the outside.

  A shaft 8 is fixed to the internal pressure measuring valve 2. The shaft 8 has a configuration in which the universal joint 4 is connected to an intermediate portion and is lifted upward by a spring 9 attached to the uppermost portion while being appropriately supported by a bearing 5 attached in the cylindrical tube 13. That is, the lower end of the spring 9 is abutted against the bearing 5 fixed to the uppermost portion, and the upper end of the spring 9 is held by the tightening screw 9 a attached to the shaft 8.

  Here, while the shaft 8 is attached to the internal pressure measuring valve 2, the bearing 5 is fixed in the cylindrical tube 13, so that strong friction is generated between the lower end of the spring 9 and the bearing 5 during operation. Power will act. For this purpose, a thrust bearing is loaded between the lower end of the spring 9 and the bearing 5. In addition, since the universal joint 4 is connected to the shaft 8, the possibility of breakage even if a load due to the drilled metal bit 13 a is applied to the shaft 8 is reduced.

  The extension tube 3, the open / close ball valve 6, the second extension tube 7 and the like are assembled while being sequentially stacked, and in the process, the cylindrical tube 13 is fitted into the hollow portion and appropriately divided into a plurality of parts. The bearings 5 are assembled in parallel and fixed in the cylindrical tube 13. As shown in FIG. 3, when the uppermost cylindrical tube 13 is finally attached to the mounting base 10, the flange portion of the second extension pipe 7 is fixed to the mounting base 10 with screws with the seal packing 7a interposed therebetween. .

  Further, as shown in FIG. 4, on the upper side of the mounting base 10, a water stop flange 16 is composed of two upper and lower donut-shaped plates 16a and 16b, and is assembled with an O-ring 16c interposed therebetween. Yes. The donut-shaped plates 16a and 16b of the water stop flange 16 are tightened in the vertical direction by bolts and nuts, and the O-ring 16c is sandwiched between them. The cylindrical tube 13 fitted to the O-ring 16c is configured to maintain a sealed state.

  The uppermost cylindrical tube 13 sandwiched between the O-rings 16 c is connected to the motor M by a connection handle 15. Although not described in detail, the connection handle 15 is provided with an inlet for injecting cooling water and a lubricant for the perforated metal bit 13a. The motor M is attached to the guide post 14 and is held so as to be slidable in the vertical direction along the guide post 14. The guide post 14 is fixed to a post base 12 fixed to the mounting base 10.

  Hereinafter, an operation method of the repair tool when repairing the pressurization pipe using the pressurization pipe repair tool configured as described above will be described. The method of attaching the extension tube 3 to the substrate 1 and attaching the shaft 8 to the measuring valve 2 has already been described. Further, the open / close ball valve 6 has a structure that is normally opened when the cylindrical tube 13 is inserted, which is common to this type of product.

  Therefore, since the motor M is fixed at the illustrated position of the guide post 12, when the motor M is started and the motor M is lowered by the operation of the handle Ma, the cylindrical tube 13 turns and the perforated metal bit 13a at the foremost end is turned on. Cuts a part of the substrate 1. At this time, since the shaft 8 is fixed to the measuring valve 2, the bearing 5 is held therein because it rotates together with the cylindrical tube 13. When a part of the substrate 1 is cut and cut out by the perforated metal bit 13a, the part of the cut out substrate 1 is pulled upward together with the shaft 8 by the spring 9.

  In this case, the pressurized body in the pipe P fills the cylindrical pipe 13 upward due to the substrate 1 being cut out, but the O-ring 16c of the water stop flange 16 maintains airtightness as described above. Therefore, it will not come out any further. Thereafter, the motor M is further pulled upward along the guide post 14, and when the drilled metal bit 13 a at the tip exceeds the open / close ball valve 6, the open / close ball valve 6 closes the pipe passage. It does not flow upward.

  Subsequently, the cylindrical pipe 13 is pulled out, and a separate discharge pipe is attached to discharge the pressurized body in the pipe P in place of the water stop flange 16, and this pipe is connected to a necessary position and installed. The work is complete. Then, after the open / close ball valve 6 is opened and the pressurized body in the pipe P is extracted, the repair work in that section, which is the original purpose, is performed. Prior to the repair work, the substrate 1 in the manhole is removed so that the worker can enter and exit the pipe. The repair work is performed on the damaged portion of the pipe P by the method described in Japanese Patent Application Laid-Open No. 2014-58995, which is a patent application filed by the same applicant.

  When the above-described operation is completed, the cylindrical tube 13 is sequentially disassembled, the shaft 8 and the bearing 5 are removed, and the cylindrical tube 13 is reused.

  In this way, the manhole in the repair section is used in advance to close inflow water, etc., in the upstream and downstream sides of the pipe including the manhole with the inner lid, and the high pressure in this section is applied. By removing the pressure body, it is possible to provide a pressure tube repair tool that can perform the repair work in the section safely and efficiently. In addition, if the delivery of the pressurizing body thereafter is stopped by stopping the delivery pump on the upstream side in the pipe, the upstream side is not necessarily closed. When the repair work is completed, the manhole is covered and a new substrate 1 is installed.

  Furthermore, the pressurization pipe repair method of this invention can provide the pressurization pipe repair method for performing repair work in a section using the said pressurization pipe repair tool.

  In the above embodiment, the bearing 5 is preferably fixed in the cylindrical tube 13 by welding or the like. However, the bearing 5 only needs to be able to regulate the position in the cylindrical direction, and can be swung freely by a notch or the like provided in the cylindrical tube 13. A supporting structure may be used.

  In the above-described embodiment, the open / close ball valve 6 is not an essential constituent element. Instead of the open / close ball valve 6, a branch discharge pipe is installed above the manhole, and the branch discharge pipe is connected in advance along a predetermined path. In this case, when a part of the substrate 1 is cut and cut out by the perforated metal bit 13a, the pressurized body in the pipe is discharged from the branch discharge pipe. In this case, a horizontal hole is appropriately formed in the cylindrical pipe 13 to form a discharge port in advance, or when the cylindrical pipe 13 is pulled up to the position of the water stop flange 16, the pressurizing body in the pipe is connected to the branch discharge pipe. The intended purpose is achieved by allowing the water to be discharged from the branch discharge pipe.

  Further, in the above embodiment, the shaft 8 is not an indispensable constituent element. If the part of the substrate 1 is cut and cut out by the perforated metal bit 13a and allowed to fall into the pipe, the shaft 8 and The bearing 5 and the spring 9 are also unnecessary.

  In addition, this invention is not limited to the said embodiment, Embodiment can be changed suitably and implemented within the range of the technical idea of this invention.

DESCRIPTION OF SYMBOLS 1 ... Board | substrate 2 ... Measurement valve 3 ... Extension pipe 4 ... Universal joint 5 ... Bearing 6 ... Opening / closing ball valve 7 ... Second extension pipe 8 ... Shaft DESCRIPTION OF SYMBOLS 9 ... Spring 10 ... Mounting stand 11 ... Short pipe flange 12 ... Post stand 13 ... Cylindrical pipe 14 ... Guide post 15 ... Connection handle 16 ... Water stop flange

Claims (4)

In a pressure tube repair tool that drills a substrate fixed to a pressure tube,
A hollow extension pipe that is attached to the pressurizing pipe by extending outward and has a flange portion,
An open / close ball valve which is attached to the flange portion and forms a concentric hollow portion,
A second extension tube attached to the outer flange portion of the opening and closing ball valve to form a concentric hollow portion;
A mounting base for installing the second extension pipe on the fixed portion;
A cylindrical tube having a perforated metal bit along the circumferential surface of the tip, which is arranged in contact with the substrate while being guided by the hollow portion of the extension tube attached to extend outward from the pressure tube;
An extension cylindrical tube connected to the cylindrical tube while being guided by the hollow portion of the second extension tube ;
A motor that drives a cylindrical tube connected to the top;
A guide post that holds the motor movably in the vertical direction and is fixed to the mounting base;
A shaft integrally attached to the substrate in the cylindrical tube;
A bearing that supports the shaft so as to be vertically movable and is supported in the cylindrical tube;
A universal joint formed on a part of the shaft;
A spring fixed to the upper end of the shaft and provided with an extension force interposed between the bearings,
Each of the cylindrical tubes is rotated by driving the motor, the substrate is cut by the perforated metal bit, and a part of the substrate cut by the spring is lifted upward. Pressure tube repair tool. In a pressure tube repair tool that drills a substrate fixed to a pressure tube,
An extension tube extending outward from the pressure tube and attached to the substrate, and having a hollow portion;
A discharge pipe connected to the extension pipe;
A cylindrical tube having a perforated metal bit along the circumferential surface of the tip that is disposed in contact with the substrate while being guided by the hollow portion of the extension tube;
A motor for driving the cylindrical tube,
The cylindrical tube is rotated by driving the motor, the substrate is cut and cut by the perforated metal bit, and the pressurizing body in the pressurizing tube is discharged by the discharge tube. Pressure tube repair tool. In a pressure tube repair method using a pressure tube repair tool for drilling a substrate fixed to a pressure tube,
Installation in which a hollow extension pipe extending outward from the pressurizing pipe, an open / close ball valve formed with a concentric hollow part, and a second extension pipe formed with a concentric hollow part are installed in a fixed part A cylindrical motor arranged to contact the substrate while being guided by the hollow portion of the extension tube is operated by a drive motor that is attached to the base and moves along a guide post attached to the fixed portion. The substrate is cut by a perforated metal bit configured along a peripheral surface, and a shaft integrally attached to the substrate in the cylindrical tube is interposed between a bearing supported in the cylindrical tube and an upper end of the shaft. A pressure tube repair tool configured to pull up a part of the cut substrate by a compression spring,
After cutting the substrate with the perforated metal bit, the cylindrical tube is pulled up halfway, the cylindrical tube is pulled upward with the open / close ball valve closed, the discharge tube is connected to the upper extension tube, and then the open / close ball valve A pressurizing pipe repairing method using a pressurizing pipe repairing tool, wherein the pressurizing pipe is repaired by opening and releasing the pressurizing body in the pressurizing pipe. In a pressure tube repair method using a pressure tube repair tool for drilling a substrate fixed to a pressure tube,
An extension tube extending outward from the pressure tube and attached to the substrate, and having a hollow portion;
A discharge pipe connected to the extension pipe;
A cylindrical tube having a perforated metal bit along the circumferential surface of the tip that is disposed in contact with the substrate while being guided by the hollow portion of the extension tube;
A motor for driving the cylindrical tube,
A pressurizing tube repairing tool configured to rotate the cylindrical tube by driving the motor, cut and cut the substrate with the perforated metal bit, and discharge the pressurizing body in the pressurizing tube with the discharge tube. There was a pressure tube repair method.

Images