JP2008232217A - Repair method of flange piping connection part and tool for repair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely fill a sealing material in a clearance of a mechanical connection part in a flange piping connection part as a countermeasure against aging of the flange piping connection part. <P>SOLUTION: The tool for repairing the flange piping connection part is provided with a tightly connected part B tightly connected with the sealing member between them and the mechanical connection part A. The tool for repair is provided with a ring-like member 1 attached to outside of all over outer circumferential surface of the flange F. The ring-like member 1 forms a cleaning space 1A for communicating with the clearance S formed at the mechanical connection part A at its inside and is provided with a plurality of opening parts 1B for communicating with the cleaning space 1A. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a flange pipe connection repair method and a repair jig, and in particular, a repair method and repair treatment for the purpose of preventing leakage of a flange pipe connection, repairing after leakage, and reinforcing connection strength. It relates to ingredients.

  The flange pipe connection part is used for pipe connection parts such as city gas pipes, water and sewage pipes, and various industrial fluid (including liquid, gas, and steam) pipes. This flange pipe connection part is a mechanical part that connects a pair of flanges with bolts and nuts formed on the outer periphery of this part (referred to as a tight connection part) sandwiched between seal members called gaskets or packing. This mechanical connection portion is standardized so that a slight gap is formed between a pair of flange surfaces or bolt insertion holes. There is something.

  In such a flange pipe connection portion, the airtightness of the seal member may be impaired due to aging after pipe laying. For this, after removing the connection bolt and releasing the connection, the seal member may be replaced with a new one. However, in order to perform the work, it is necessary to cut off the fluid flowing through the pipe on the upstream side of the connection part. There is a problem that the fluid supply to the downstream side of the connection portion is temporarily interrupted.

  In order to cope with this problem, in order to cope with the aging of the connecting portion while maintaining the fluid supply to the downstream side of the connecting portion, the gap between the flange pipe connecting portions is filled with a sealing material made of a resin material. Various methods for forming an airtight layer of a sealing material made of a resin material around an aging sealing member have been proposed.

  In the following Patent Document 1, as shown in FIG. 1, in the flange joint for connecting the pipes P1 and P2, the outer peripheral surfaces Fa and Fa of the flanges F and F mechanically connected by bolts B and nuts N A method of filling the gap S between the flange surfaces with the sealing resin material by attaching the surrounding member R having the injection hole I facing the gap S between the flange faces and injecting the seal resin material from the injection hole I. Is described.

Further, in Patent Document 2 below, a wire is wound around the outer peripheral portion between the flange surfaces, the bolt that mechanically connects the flange is replaced with a grooved bolt, and the wire is wound through the groove of the grooved bolt. A method for injecting resin into the inner gap of the wire is described.
JP-A-11-230441 JP 2004-17236 A

  According to the above-described conventional technology, it is possible to perform repair corresponding to the aging of the connection portion while maintaining the connection state of the flange pipe connection portion. In order to reliably perform such a conventional construction method, it is necessary that the gap of the mechanical connection part described above in the flange pipe connection part is an open space suitable for filling with the resin material. is there.

  However, when the flange pipe connection part is laid underground or outdoors, the gap of the mechanical connection part described above is blocked by mud, rust, etc., and this gap is completely made of resin material. There is a problem that it cannot be filled.

  In order to solve this problem, it is necessary to perform cleaning for opening the gap between the mechanical connection portions described above prior to the resin material injection step, but the flange pipe connection portion is narrow. Since it is often installed in the pit, manual cleaning work may be extremely difficult, and the lower part of the flange pipe connection part is often close to the ground or the laying base surface. There is a problem that the entire flange including it cannot be reliably cleaned.

  Furthermore, since the sealing member of the flange pipe connection part may contain harmful substances such as asbestos, there is a problem that the safety of the work cannot be ensured by manual cleaning work. In addition, there is a problem in that the repair work cannot be smoothly performed when the work is performed with a dust-proof means such as a mask in order to prevent harmful substances from entering the body.

  In particular, if mud or rust in the gap is blown away with an air gun or the like, the asbestos contained in the sealing material will be scattered, which is very undesirable for the human body.

  This invention makes it an example of a subject to cope with such a problem. In other words, as a countermeasure against the aging of the flange pipe connection part, the gap between the mechanical connection parts in the flange pipe connection part can be reliably filled with a sealing material, and the flange pipe connection part is in a place with poor workability such as in a narrow pit. Even when installed, it is possible to reliably clean the gaps described above, to be able to reliably clean the entire flange piping connection, and to ensure smooth work while ensuring work safety. That is possible is an object of the present invention.

  In order to achieve such an object, the flange pipe connection repair method and repair jig according to the present invention have at least the following features.

  For example, a flange pipe connection portion having a tight connection portion that is tightly connected across a seal member and a mechanical connection portion that is formed on the outer periphery of the tight connection portion and mechanically connects a pair of flanges. A repairing method, the step of forming a cleaning space communicating with the gap formed in the mechanical connection portion outside the entire outer circumference of the flange; and by introducing a cleaning material into the cleaning space And a filling step of filling the gap with a sealing material through the cleaning space.

  In addition, a flange pipe connection portion having a tight connection portion that is tightly connected across a seal member and a mechanical connection portion that is formed on the outer periphery of the tight connection portion and mechanically connects a pair of flanges. And a ring-shaped member mounted on the outer periphery of the outer peripheral surface of the flange. The ring-shaped member communicates with a gap formed in the mechanical connection portion on the inner side. A cleaning space is formed, and a plurality of openings communicating with the cleaning space are provided.

  According to such a feature, the cleaning material is put into the cleaning space formed outside the entire outer periphery of the flange, and the gap formed in the mechanical connection portion of the flange pipe connection portion is cleaned. Thus, the gap can be reliably cleaned. As a result, the entire cleaned gap can be reliably filled with the sealing material.

  Moreover, since the cleaning material is put into the cleaning space and the gap is cleaned, the cleaning work can be performed in a state where the cleaning material and the cleaning processing product are confined in the cleaning space, and the cleaning processing product is not contaminated. The influence on the human body can be eliminated and the work can be performed smoothly and safely.

  Further, since the cleaning space is formed around the entire outer peripheral surface of the flange, the gap can be easily cleaned over the entire flange even in a place with poor workability such as in a narrow pit.

  Furthermore, since the gap is filled with the sealing material through the cleaning space, the sealing material filling process can be performed continuously from the cleaning process, and the work from the cleaning to the filling of the sealing material can be performed smoothly and continuously. Can be done quickly.

  Such a cleaning space is formed by the ring-shaped member of the repair jig having the above-described characteristics, and the ring-shaped member includes a plurality of openings that communicate with the cleaning space. According to this, after mounting the ring-shaped member on the outer periphery of the flange, the cleaning material is put into the cleaning space through one opening, and the cleaning process product is discharged from the other opening. Moreover, after completion | finish of cleaning, it fills with the sealing material in the clearance gap cleaned through the cleaning space in the state which mounted | wore with the ring-shaped member. As a result, the cleaning work can be performed without touching the cleaning object, and the gap is filled with the sealing material through the cleaning space. It is possible to smoothly perform from cleaning to filling of the sealing material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a schematic flow diagram illustrating a repair method for a flange pipe connection part according to an embodiment of the present invention. According to the flange pipe connection repairing method according to the embodiment of the present invention, the cleaning space forming step S1 is performed from the start of the operation, then the cleaning step S2 is performed, and then the filling step S3 is performed. The work is finished.

  The cleaning space forming step S1 is a step of forming a cleaning space communicating with a gap formed in the mechanical connection portion of the flange pipe connection portion outside the entire outer periphery of the flange. In this cleaning space forming step S1, a repair jig is used.

  3 (a) is a partial cross-sectional view of the outer peripheral portion of the flange, FIG. 3 (b) is an XX cross-sectional view of the entire flange pipe connection, and FIG. 4 is a flange pipe connection portion according to an embodiment of the present invention. It is explanatory drawing explaining the cleaning space formation process in the repair method of this, and the jig | tool for repair of a flange piping connection part.

  In the figure, a region indicated by A is a mechanical connection portion in the flange pipe connection portion, and is a portion in which a pair of flanges F are connected by mechanical connection means M (for example, bolts and nuts). In the mechanical connection portion A, a gap S is formed between the opposing flange surfaces and in the insertion hole of the mechanical connection means M. Moreover, the area | region shown by B is the close_contact | adherence connection part which carries out close contact connection on both sides of the sealing member F1. The pipes P1 and P2 are connected by the flange pipe connection portion.

  The repair jig for the flange pipe connection portion includes a ring-shaped member 1 that is attached to the outside of the entire outer periphery of the flange F. This ring-shaped member 1 forms a cleaning space 1A communicating with a gap S formed in the mechanical connection portion A on the inside thereof, and includes a plurality of openings 1B communicating with the cleaning space 1A.

  Moreover, the ring-shaped member 1 consists of a some division body, and is mounted | worn with the outer peripheral surface of the flange F by connecting a division body. As shown in FIG. 3, it may be divided into two parts by divided bodies 1x and 1y, or may be divided into three parts by divided bodies 1x, 1y and 1z as shown in FIG. . Further, it may be divided into four or more (in the example shown in FIG. 4, a jaw Fs is formed in the lower part of the flange F, and the divided body is formed so as to correspond to the jaw Fs. The convex part 1ys is formed in 1y). Further, as shown in the figure, the divided members may be connected by bolts and nuts 3 or by other fixing means.

  The cleaning space 1 </ b> A is formed between a pair of ring-shaped seal members 2 formed on the inner surface of the ring-shaped member 1.

  In the cleaning space forming step S1, a ring-shaped member 1 made of a divided body (1x, 1y or 1x, 1y, 1z) is prepared in advance according to the size of the flange F to be repaired. Attach to the outer peripheral surface. Thereby, the mounting operation of the ring-shaped member 1 can be performed while the flange pipe connection portion is maintained in the connected state.

  As shown in FIG. 4, when the ring-shaped member 1 is divided into three parts, the tightening force by the ring-shaped member 1 can be obtained uniformly over the entire circumference of the flange F, so that the airtightness of the cleaning space 1A is improved. It becomes possible to raise more.

  Next, the cleaning step S2 in the flange pipe connection repairing method according to the embodiment of the present invention is a step of cleaning the gap S of the mechanical connection portion A by introducing a cleaning material into the cleaning space 1A.

  5 to 8 (FIG. 5 is the first embodiment, FIG. 6 is the second embodiment, FIG. 7 is the third embodiment, FIG. 8 is the fourth embodiment, and parts common to the description in FIG. Is a description of the cleaning process and the function of the flange pipe connection portion repair jig in the flange pipe connection repair method according to an embodiment of the present invention. FIG. In these embodiments, the opening 1B of the ring-shaped member 1 is formed with a connecting portion 1C for connecting a cleaning material input means 4 for supplying a cleaning material for cleaning the gap S to the cleaning space 1A.

  In the embodiment shown in FIG. 5, the cleaning material charging means 4 includes a cleaning material tank 4A, a charging valve 4B, a connecting hose 4C, and a connector 4D, and is connected to the connecting portion 1C by the connector 4D. In addition, the opening 1B of the ring-shaped member 1 is formed with a connecting portion 1D for connecting a suction means 5 for sucking and discharging the cleaning object. The suction means (suction pump) 5 includes a suction hose 5A and a connector 5B, and is connected to the connection portion 1D by the connector 5B. The other opening 1 </ b> B of the ring-shaped member 1 is sealed with a sealing plug 6.

  In the cleaning step S2 according to the embodiment shown in FIG. 5, the suction means 5 is operated, the input valve 4B is opened to supply the cleaning material, and the cleaning material is drawn into the cleaning space 1A from the cleaning material tank 4A. The cleaning material introduced into the cleaning space 1A cleans the gap S while circulating in the cleaning space 1A by the suction force of the suction pump 5A, and includes a cleaning material and a foreign substance clogged in the gap S. An object is recovered in the recovery container 5C via the suction hose 5A.

  In the embodiment shown in FIG. 6, the cleaning material charging means 7 includes a cleaning material tank 7A, a charging valve 7B, a compression means (compression pump) 7C, a connecting hose 7D, and a connector 7E, and is connected to the connecting portion 1C by the connector 7E. ing. In addition, the opening 1B of the ring-shaped member 1 is formed with a connecting portion 1D that connects the discharging means 8 that discharges the cleaning object. The discharge means 8 includes a discharge hose 8A, a connector 8B, and a discharge container 8C, and is connected to the connection portion 1D by the connector 8B. The other opening 1 </ b> B of the ring-shaped member 1 is sealed with a sealing plug 6.

  In the cleaning step S <b> 2 according to the embodiment shown in FIG. 6, the cleaning material is press-fitted from the cleaning material charging means 7 connected to the opening 1 </ b> B formed in the ring-shaped member 1, and the other opening 1 </ b> B of the ring-shaped member 1. Drain the cleaning product from That is, the compression means 7C is operated and the closing valve 7B is opened to press-fit the cleaning material from the cleaning material tank 7A into the cleaning space 1A. The cleaning material press-fitted into the cleaning space 1A cleans the gap S while circulating in the cleaning space 1A, and the cleaning material and foreign substances clogged in the gap S are discharged via the discharge hose 8A. It is recovered in the recovery container 8C.

  According to the embodiment shown in FIG. 5 and FIG. 6, the cleaning material is spread to every corner of the gap S by suction or compression, and the foreign matter in the gap S can be reliably removed. Further, since the cleaning material and the cleaning processed product are collected from the closed cleaning space 1A into the collection container 5C or 8C via the suction hose 5A or the discharge hose 8A, the periphery of the flange pipe connection portion where the work is performed is performed. Do not get dirty with cleaning materials or cleaning products. Moreover, even if harmful substances such as asbestos are present in the cleaning process product, the work can be performed safely without coming into contact therewith.

  In the embodiment shown in FIG. 7, the cleaning material charging means 9 includes a cleaning material tank 9A, a charging valve 9B, a compression means (compression pump) 9C, a connecting hose 9D, and a connector 9E, and is connected to the connecting portion 1C by the connector 9E. ing. Further, the opening 1 </ b> B of the ring-shaped member 1 is directed to the collection container 10. The other opening 1 </ b> B of the ring-shaped member 1 is sealed with a sealing plug 6.

  And in this embodiment, the opening 1B provided with the connection part 1C is formed so that the charging direction of the cleaning material may be directed to the tangential direction of the flange F, whereby the cleaning material swivels along the cleaning space 1A. A flow is formed.

  According to such an embodiment, in addition to the operation of the above-described embodiment, the foreign matter in the gap S can be more reliably removed by the swirling flow of the cleaning material. Moreover, since the cleaning effect can be enhanced by the swirling flow of the cleaning material, it is possible to shorten the working time of the cleaning process.

  In the embodiment shown in FIG. 8, the cleaning material charging means 11 includes a cleaning material tank 11A, a charging valve 11B, a connecting hose 11C, and a connector 11D, and is connected to the connecting portion 1C by the connector 11D. Further, the discharging means 12 is connected to another connecting portion 1D formed in the opening 1B of the ring-shaped member 1. The discharge means 12 includes a discharge hose 12A, a connector 12B, a discharge container 12C, and a suction pump 12D, and is connected to the connection portion 1D by the connector 12B. Further, in the discharge container 12C, a filter 12E that separates the cleaning object sucked into the discharge container 12C and the suction air is provided. The discharge container 12C becomes a sealed container, and is downstream of the filter 12E. The side is connected to the suction pump 12D. The other opening 1 </ b> B of the ring-shaped member 1 is sealed with a sealing plug 6.

  In this embodiment, the openings 1B and 1B in the connecting portion 1C and the connecting portion 1D are formed in two systems so as to be substantially orthogonal, and the charging direction of the cleaning material and the discharging direction of the cleaning processed product are tangential directions of the flange F, respectively. Thus, a swirling flow of the cleaning material along the cleaning space 1A is formed.

  According to such an embodiment, the foreign matter in the gap S can be more reliably removed by the swirling flow of the cleaning material as in the above-described embodiment. Moreover, since the cleaning effect can be enhanced by the swirling flow of the cleaning material, it is possible to shorten the working time of the cleaning process. Further, since the cleaning processed material is collected in the discharge container 12C by suction, efficient collection of mud, rust, etc. is possible.

  FIG. 9 is an explanatory view showing one specific form in the above-described cleaning step S2. In this embodiment, the cleaning step S2 includes a polishing step S2A and a cleaning step S2B. Therefore, for example, at least the particulate abrasive used in the polishing step S2A and, for example, water or a liquid cleaning agent used in the cleaning step S2B are used as the cleaning material described above.

  According to this, for example, as a first stage, according to the embodiment shown in any of FIGS. 5 to 8, the particulate abrasive is put into the cleaning space 1 </ b> A, and the suction force of the suction pump or the compression force of the compression pump By forming a swirling flow of the particulate abrasive material, mud and rust clogged in the gap S are removed. Further, as a second stage, water or a liquid cleaning agent is introduced into the cleaning space 1A again by any of the embodiments shown in FIGS. 5 to 8, and the suction force of the suction pump or the compression force of the compression pump is used. The gap S is cleaned by forming a swirling flow of water or liquid cleaning agent.

  In this way, the cleaning process S2 is made into two stages of the polishing process S2A and the cleaning process S2B, so that the inside of the gap S can be reliably cleaned, and the subsequent filling process S3 can be performed more smoothly and with high accuracy. It will be possible.

  As embodiment of cleaning process S2, it is not restricted to this, For example, the method of using aqueous | water-based emulsion resin as a cleaning material is also effective. The aqueous emulsion resin is not particularly limited in composition, and an aqueous acrylic resin, aqueous urethane resin, aqueous epoxy ester resin, vinyl acetate emulsion resin, or the like can be used.

  When the aqueous emulsion resin is introduced into the cleaning space 1A, the viscosity is preferably in the range of 10 mPa · s to 1000 mPa · s. By performing within that range, the cleaning space 1A can be effectively circulated. When this emulsion resin cleaning process S2 is executed, mud and rust in the gap S are removed, and then a thin film is formed on the inner surface of the gap S, so that the subsequent filling process can be performed more smoothly. The solid content of the aqueous emulsion resin is preferably 30 to 50%, and the minimum film forming temperature is preferably 10 ° C. or lower.

  In the cleaning step S2 using the aqueous emulsion resin, the mud and rust present in the gap S, and further the harmful substances such as asbestos contained in the seal member F1, the resin of the cleaning process solidifies. It is possible to prevent harmful substances from being scattered and to proceed more safely.

  Next, the filling step S3 in the flange pipe connection repairing method according to the embodiment of the present invention is a step of filling the gap S with the sealing material via the cleaning space 1A.

  FIG. 10 is an explanatory view illustrating the filling process in the flange pipe connection repairing method according to the embodiment of the present invention and the function of the repair jig for the flange pipe connection (FIG. 10 (a) shows the filling process). The first stage and FIG. 5B show the second stage of the filling process; the same parts as those in FIG.

  In the opening 1B of the ring-shaped member 1, a connecting portion 1E of the sealing material filling means 11 for filling the gap S with the sealing material is formed. The connecting portion 1E formed in the opening 1B may also serve as the connecting portion 1C of the cleaning material charging means, or the connecting portion 1E and the connecting portion 1C may be provided separately.

  The sealing material filling means 11 includes a tank portion 11A in which the sealing material is stored, a pump mechanism 11B that pushes out the sealing material from the tank portion 11A, and an injection nozzle portion 11C that is connected to the connection portion 1E. Various resin materials can be used as the sealing material. In addition, an air bleeding member 12 is attached to the opening 1B at a position facing the connecting portion 1E, and the other opening 1B not attached with the sealing material filling means 11 and the air bleeding member 12 is sealed. It is sealed with a stopper 6.

  In the filling step S3, as shown in FIG. 10 (a), one or more openings of the ring-shaped member 1 with the ring-shaped member 1 mounted on the outer periphery of the flange F after the cleaning step S2. The injection nozzle portion 11C of the sealing material filling means 11 is connected to 1B (directly or via a hose or the like), and the pump mechanism 11B is operated. At this time, it is preferable to temporarily loosen the connecting means M so that the seal material is sufficiently filled in the gap between the holes in which the connecting means M such as bolts and nuts are inserted.

  At this time, the connecting portion 1E to which the injection nozzle portion 11C of the sealing material filling means 11 is connected adopts the one located on the lower side of the flange F, filled with resin from below and located on the upper side of the flange F. Air is vented from the air vent member 12 connected to the connecting portion 1F.

  Then, as shown in FIG. 10B, the sealing material injected from the injection nozzle portion 11C of the sealing material filling means 11 into the cleaning space 1A formed inside the ring-shaped member 1 passes through the cleaning space 1A. Thus, the gap S of the mechanical connection portion A is filled. Then, it is confirmed that the sealing material is filled in the entire gap S due to overflow of the sealing material from the air bleeding member 12. Since the air bleeding member 12 is positioned on the upper side of the flange F, it is possible to reliably fill the sealing material without causing air accumulation in the cleaning space 1A and the gap S.

  By connecting the sealing material filling means 11 to the different openings 1B, it is possible to uniformly fill the entire gap S with the sealing material. For example, as shown in FIG. 10 (b), the sealing material is first filled from the connecting portion 1F located directly below the flange F, and thereafter, a slightly lateral position (45 ° shown in the drawing (2)). By filling the sealing material in the same way from the shifted position), and also filling the sealing material in the same way from the slightly lateral position on the opposite side (the position shifted by 45 ° in the opposite direction shown in the figure (3)) The sealing material can be uniformly filled in the entire gap S.

  When the filling of the sealing material is completed, the loosened connecting means M such as bolts and nuts are retightened, the gap S is brought into an airtight state, and then the sealing material is pressurized and filled again. The filling pressure at this time is increased by 20 to 30% of the maximum working pressure of the fluid to be communicated, and the fine gap remaining in the gap S is filled with the sealing material by refilling the sealing material.

  Thereafter, the sealing material filling means 11 is removed from the opening 1B of the ring-shaped member 1, and the sealing material is cured while the ring-shaped member 1 is still attached to the flange F. When the sealing material is cured, the flange pipe connection portion is managed in a state where the ring-shaped member 1 is still mounted on the flange F.

  The sealing material used in the filling step S3 may be any material as long as the fluidity of entering the gap S without any problem and the high sealing performance after solidification are obtained. A preferred example is a liquid reactive silicone rubber. The reaction type may be one-pack type or two-pack type, but in consideration of workability, one-pack type reactive silicone rubber is preferable.

  The one-component reactive silicone rubber includes a deoxime type, a dealcohol type, a deacetone type, and a deacetic acid type, any of which can be used. However, the more usable type is the dealcoholized type. The one-component reactive silicone rubber may contain calcium carbonate, amorphous silica or the like as a filler.

  The sealing material can be used from a viscous liquid to a paste, and preferably from 100 Pa · s to a paste. The tack free time (23 ° C.) is 5 to 120 minutes, and the elongation is 50 to 600%.

  According to the flange pipe connection repairing method or the repair jig according to the embodiment of the present invention, the repair work can be performed in a state in which the fluid flow in the flange pipe connection part to be repaired is maintained. And since the gap S in the mechanical connection portion A of the aging flange pipe connection portion is filled with the seal material and the seal material is hardened, it becomes possible to increase the connection strength of the flange pipe connection portion. It is possible to improve the airtightness of the flanged pipe connecting portion.

  In addition, for repair work in a narrow pit, the ring-shaped member 1 is simply mounted on the outer periphery of the flange F, and the cleaning of the gap S and the filling of the seal material into the gap S are completed in a series of work. Therefore, workability is good and work can be performed in a short construction time.

  Furthermore, even when the existing sealing member in the flange pipe connection portion contains harmful substances such as asbestos, the clearance S can be cleaned and the sealing material can be filled without touching the harmful substances. Work safely and cleanly.

It is explanatory drawing of a prior art. It is a schematic flowchart explaining the repair construction method of the flange piping connection part which concerns on embodiment of this invention. It is explanatory drawing explaining the cleaning space formation process in embodiment of this invention, and the jig | tool for repair of a flange piping connection part. It is explanatory drawing explaining the cleaning space formation process in embodiment of this invention, and the jig | tool for repair of a flange piping connection part. It is explanatory drawing explaining the function of the cleaning process in the embodiment of this invention, and the jig | tool for repair of a flange piping connection part. It is explanatory drawing explaining the function of the cleaning process in the embodiment of this invention, and the jig | tool for repair of a flange piping connection part. It is explanatory drawing explaining the function of the cleaning process in the embodiment of this invention, and the jig | tool for repair of a flange piping connection part. It is explanatory drawing explaining the function of the cleaning process in the embodiment of this invention, and the jig | tool for repair of a flange piping connection part. It is explanatory drawing explaining the cleaning process in embodiment of this invention. It is explanatory drawing explaining the function of the filling process in the embodiment of this invention, and the jig | tool for repair of a flange piping connection part.

Explanation of symbols

1 ring-shaped member, 1A cleaning space, 1B opening,
1x, 1y divided body, 2 ring-shaped seal member, P1, P2 piping,
F flange, S clearance, 3 bolts and nuts A mechanical connection part, B tight connection part

Claims (15)

A method of repairing a flange pipe connection portion comprising a tightly connected portion that is tightly connected across a seal member and a mechanically connected portion that is formed on the outer periphery of the tightly connected portion and mechanically connects a pair of flanges. ,
Forming a cleaning space communicating with a gap formed in the mechanical connection portion outside the entire outer peripheral surface of the flange; and
A cleaning step of cleaning the gap by introducing a cleaning material into the cleaning space;
A filling step of filling the gap with a sealing material through the cleaning space;
A method for repairing a flange pipe connection portion, characterized by comprising:   Forming the cleaning space inside a ring-shaped member mounted on the outer peripheral surface of the flange, pouring the cleaning material from an opening formed in the ring-shaped member, and then injecting the sealing material The repair method of the flange piping connection part described in Claim 1 characterized by these.   The method for repairing a flange pipe connecting portion according to claim 2, wherein the mounting of the ring-shaped member is performed by connecting divided bodies of the ring-shaped member.   The flange pipe connection repairing method according to claim 2, wherein the cleaning space is formed between a pair of ring-shaped seal members formed on an inner surface of the ring-shaped member.   In the cleaning step, the cleaning material is input from the cleaning material input means connected to the opening of the ring-shaped member, and the cleaning material is drawn by the suction means connected to the other opening formed in the ring-shaped member. The flange pipe connection repairing method according to any one of claims 2 to 4, wherein the cleaning pipe is drawn into the cleaning space and the cleaning process product is sucked and discharged.   The cleaning step is characterized in that a cleaning material is press-fitted from a cleaning material input means connected to an opening formed in the ring-shaped member, and a cleaning process product is discharged from the other opening of the ring-shaped member. The repair method of the flange piping connection part described in any one of Claims 2-4.   In the said cleaning process, the swirling flow of the cleaning material along the said cleaning space is formed, The repair method of the flange piping connection part described in Claim 5 or 6 characterized by the above-mentioned. The cleaning material is at least a particulate abrasive and water or liquid cleaning material,
The flange pipe connection portion according to claim 1, wherein the cleaning step includes a polishing step using the particulate abrasive and a cleaning step using the water or liquid cleaning material. Repair method.   The said cleaning material consists of water-based emulsion resin, The repair method of the flange piping connection part described in any one of Claims 1-7 characterized by the above-mentioned. A jig for repairing a flange pipe connection portion comprising a tightly connected portion that is tightly connected across a seal member and a mechanically connected portion that is formed on the outer periphery of the tightly connected portion and mechanically connects a pair of flanges. There,
Comprising a ring-shaped member mounted on the outer periphery of the outer peripheral surface of the flange;
The ring-shaped member is formed with a cleaning space that communicates with a gap formed in the mechanical connection portion on the inside thereof, and includes a plurality of openings that communicate with the cleaning space. Repair jig.   The said ring-shaped member consists of a some division body, and is attached to the outer peripheral surface of the said flange by connecting this division body, The repair treatment of the flange piping connection part described in Claim 10 characterized by the above-mentioned. Ingredients.   12. The flange pipe connection part repair according to claim 10, wherein a connection part for connecting a cleaning material input means for supplying a cleaning material to the cleaning space is formed in the opening. jig.   The jig for repairing a flange pipe connection part according to claim 12, wherein a connection part for connecting a suction means for sucking and discharging the cleaning object is formed in the opening part.   14. The jig for repairing a flange pipe connection part according to claim 12, wherein a connection part of a sealing material filling means for filling the gap with a sealing material is formed in the opening.   The flange pipe connection repairing repair device according to claim 14, wherein the connection portion formed in the opening serves also as a connection portion of the cleaning material charging means and a connection portion of the sealing material filling means. Ingredients.

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