JP2004116708A - Flexible tube repairing method and flexible tube joint mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a mechanism capable of stopping leakage in the state of a tube joint part continuing the operation thereof as a pipeline and under the condition that flexible action is maintained without cutting off the circulation of fluid in a tube or closing the tube when the leakage occurs from a tube joint part used in an existing pipeline by a life limit due to deterioration with time. <P>SOLUTION: In this flexible tube repairing method, the repair part of the joint part in an existing pipeline member 10 is covered with a repair housing 1, the joint part 6 to which a seal material 5 is fitted is formed between the repair housing 1 and the existing pipeline 10, and a connection and repair relation between the existing pipeline 10 and the repair housing 1 is formed under the condition of sealing by the sealing material 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
The present invention relates to a method for repairing a telescopic flexible pipe and a telescopic flexible pipe joint mechanism, and in a case where a pipe joint part or the like used in an existing pipeline leaks due to a life limit due to aging, etc. An object of the present invention is to provide a method and a mechanism capable of preventing a leak while maintaining the operation as a pipeline without interrupting or blocking the flow, and performing repair under the condition of maintaining the expansion and contraction flexible action.
[0002]
[Prior art]
In the joint mechanism adopted in the existing pipeline, securing flexibility is essential to cope with crustal movements such as uplift and depression, and to allow temperature changes in other places such as underground. Further, it is generally known that such existing pipes cause leakage due to the limitation of the life of the joints and the like.
[0003]
When leakage occurs in the existing pipeline as described above, it is general to repair by stopping and blocking the flow of fluid in the pipeline. That is, by interrupting the flow of the fluid in the pipeline, it is possible to closely examine the state of occurrence of leakage or the like in the existing pipeline in general, and to carefully repair such a leakage state.
[0004]
[Problems to be solved by the invention]
However, even if the above-described prior art can perform careful and accurate repair, the number of steps is increased, and time and cost are required. In other words, fluids such as water and gas are usually transported over a considerable long distance by their transport lines, and it takes a considerable amount of man-hour and time to closely inspect the entire distribution system and check the state of occurrence of leakage. Obviously, you need
[0005]
It is to be noted that the supply of the liquid or the gas as described above is generally performed by using a pipe today, and the supply of the liquid or the gas by such a pipe is controlled by a joint portion or by ensuring expansion and contraction flexibility. It is obvious that it is preferable to use a sealing material in order to secure an effective sealing or control relationship, but it is difficult to satisfy both the operability and the sealing performance of the pipeline with the conventional sealing material. It is.
[0006]
Further, even if it is considered that the leakage occurrence state in which the flow of the fluid is interrupted can be examined in detail, the actual leakage state examination is disadvantageously difficult to obtain effectively and appropriately. That is, the leakage occurrence state can be visually or acoustically perceived as a small leakage by confirming the state of ejection, but it is necessary to visually or acoustically confirm the leakage under the condition of interruption of distribution. Can not. In particular, foaming liquid is applied as a means for confirming relatively minute leakage, but such a method cannot be adopted. Therefore, in any case, careful examination cannot be performed.
[0007]
[Means for Solving the Problems]
The present invention was conceived in view of the above-described circumstances, and was devised in view of the above-mentioned circumstances, and under conditions where a pipe joint portion employed in an existing pipeline has leaked due to a limit of service life or the like. The present invention has succeeded in effectively and appropriately adopting a telescopic flexible conduit without interrupting the fluid in the conduit while maintaining the operating state of the conduit as follows.
[0008]
(1) A repair housing is covered with a repair part such as a joint part in the existing pipeline body, and a joint part having a seal material interposed between the repair housing and the existing pipeline is formed; A method for repairing a telescopic flexible tube, wherein a connection repair relationship between an existing pipeline and a repair housing is formed under a sealing condition by the seal material.
[0009]
(2) The method for repairing a telescopic flexible tube according to the above (1), wherein a repair housing individually manufactured at a construction site or the like is employed.
[0010]
(3) The repair housing has a repair housing adapted to the cross-sectional shape of the joint part in the existing pipeline, and has a connecting means between a tightening seat formed at an end of the repair housing and the pipeline. A telescopic flexible pipe joint mechanism for repair, characterized in that a flange body is attached to both ends in the axial direction and an elastic ring is disposed between the flange body and the repair housing.
[0011]
(4) The telescopic flexible pipe joint mechanism for repair according to the above (3), wherein parallel end plates are provided at both ends of the repair housing.
[0012]
(5) The telescopic flexible pipe joint mechanism for repair according to the above (3), wherein crossed end plates are provided at both ends of the repair housing.
[0013]
(6) The cross section of the elastic ring interposed between the flange portion body and the repair housing has a joining projection for a seal portion to be joined to the sealing material, and a section between the existing pipe outer surface and the split repair housing outer surface. The telescopic flexible pipe joint mechanism for repair according to any one of the above (3) to (5), wherein an intermediate projecting portion facing the corner portion is formed.
[0014]
[Action]
A joint housing having a covering sleeve and a seal material provided therein by covering the repair housing with respect to the repair portion of the pipeline and providing a joint portion having a seal material provided between the repair housing and the pipeline. Is used as a repair part of a telescopic flexible tube.
[0015]
By adopting a separately manufactured repair housing at the construction site etc., the repair housing corresponding to the form in each repair part is adopted, and repair is performed simply and accurately under the continuous condition of fluid flow in the pipeline, Therefore, it is possible to perform the repair under the condition in which the specific leakage state is confirmed, and to perform the accurate repair.
[0016]
By forming the connection connection between the existing pipe and the covering sleeve under the sealing condition by the sealing material, the connection connection between the existing pipe and those members can be easily and accurately formed, and the repair purpose can be quickly and accurately performed. Achieve it.
[0017]
A repair housing corresponding to the cross-sectional shape of the joint part in the existing pipeline is provided, and a connecting means is provided between a tightening seat formed at an end of the repair housing and the pipeline, so that the repair housing is interposed. In this way, the integrated repair pipe joint can be easily and accurately formed in response to the existing joint part.
[0018]
A simple and proper mounting state is formed by mounting a flange body at both axial ends of the repair housing and disposing an elastic ring between the flange body and the repair housing.
[0019]
By providing parallel end plates at both ends of the repair housing, it is possible to achieve a substantially accurate and stable setting under conditions where the deformation of the intended pipe section is relatively small, and perform appropriate repair. .
[0020]
Even if the intended repair pipeline is deformed and bent as a result of the provision of the crossed end plates at both ends of the repair housing, the setting is made in response to the condition of such repair pipeline, Appropriate repair according to the invention Effective repair can be easily achieved without significantly deforming the pipeline.
[0021]
The seal material is provided with a seal material to be joined to the existing pipe outer surface and the outer surface of the split repair housing and a seal material to be joined to the existing pipe outer surface and the split repair housing outer surface. The formation of the intermediate projections facing the corners with the outer surface of the split repair housing enables the parts to be accurately assembled, and the proper operation to be performed by a compact configuration.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
A specific embodiment of the present invention as described above will be described. One example of the existing pipeline 10 has a plurality of pipes 11, 11 at their joints 12, 12, as shown in FIGS. The connection bolt 13 is inserted into the flange portions 14 and connected to each other as in the conventional manner.
[0023]
A specific example of another existing joint or sleeve portion related to the existing pipelines 10 and 11 having different axial directions is as shown in FIG. 3, and a flange of the existing pipeline sections 10 and 10 is provided by a joint bolt 13. The connection of the parts 14 is the same as that shown in FIG. 1, but the flange parts 14, 14 provided at both ends of the housing 1 are angled, and the ends at both ends of the repair housing 1 are provided. The plates 15 are provided at both ends of the housing 1 at a required angle. In addition, it is general that the flange portion 14 constituting the connecting portion of the existing pipeline members 10 is appropriately formed by field welding.
[0024]
In the existing pipe section body 10 or 11 having the above-described configuration, partial corrosion and breakage often occur due to the limit of the life of the joint portion and the like, and the leakage often occurs. It is inevitable to shut off the pipes, and it is essential to stop the operation of the pipeline and stop the leakage. Such an operation stop of the pipeline stops at least water supply to the entire downstream area by the pipeline, that is, water supply or supply stop is an essential prerequisite for repair.
[0025]
According to the present invention, as shown in FIG. 1, FIG. 2 or FIG. 3, in contrast to such a conventional one, a portion connected by a joint portion 6 or 6a having a flange portion 14 and a bolt 13 is used. A repair housing part 1 for accommodating the housing 6 or 6a is prepared, and at the time of the above-described leakage, the location of the leak near the joints 6, 6a is determined by the repair housing part 1 together with FIG. As shown in FIG. 3, the cover is hermetically sealed, and after such a hermetic seal is repaired, a leakage portion or the like is performed. In other words, the existing pipe section 10 and its joint 14 are in conformity with the standard dimensions in any case, so that a sealing material is appropriately used between the housing section 1 and the pipe 11 or the like. By doing so, it is easy to set in a sealed state, and it is usual that an accurate sealing relationship can be formed simply by mounting the housing portion 1. In addition, even after setting, it is normal to be an expansion / contraction flexible joint as it is. Of course, it is also possible to appropriately use an auxiliary sealing material together, and in any case, it is possible to obtain setting and use without waste. Can be.
[0026]
That is, the flange portion 14 is set on the end surface of the housing body 1 with the joint bolt 13 or the like, so that an accurate mounting relationship can be formed. The relationship can also be appropriately adjusted by adjusting the nut 3 or the like, and can be formed stably and accurately.
[0027]
In the housing body 1 as shown in FIGS. 2 and 3, the sealing member 5 is pressed against the gap 20 between the flange portion 14 and the pipe body 11 or 10 by adjusting the nut 20 screwed to the tightening rod 19. It is practically essential to deform and seal the gap with the housing body 1. That is, even with an elastic sealing material having a circular or polygonal cross section, a substantially appropriate sealing state can be formed by the tension applied by the nut 20.
[0028]
However, the present inventors have shown in FIG. 4 as a sealing material 5 for ensuring an effective sealing relationship with a gap between the planar housing member 1 and the surface of the flange portion 14 as shown. It has been experimentally confirmed that a material having a sectional shape can form and secure a preferable stable sealing relationship. That is, one half of the sealing material 5 forms a substantially arc-shaped surface portion 15 as shown in FIG. 4, while the other half forms a boss-shaped projection 16 at the center thereof. Are provided with concave portions 17 on both sides.
[0029]
That is, as shown in FIG. 3 and FIG. 4, the present inventors have examined the installation conditions of the sealing material 5 as described above, and as shown in FIG. In general, corner-type intermediate portions 18 and 18 are provided opposite to each other, and a square-shaped inlet portion 19 is positioned on the front side of the rectangular recess 8. In order to stably and accurately fit the sealing material 5 as an elastic material to the corner-shaped intermediate portions 18, 18, the sealing material 5 is fitted to the square concave portions 8 or the corner-shaped intermediate portions 18, 18 as shown in FIG. 3. It has been confirmed that the corner-shaped projections 19 and 19a, 19a can be set smoothly and stably.
[0030]
That is, by adopting the sealing material 5 having the cross-sectional structure as shown in FIG. 4, accurate fitting setting can be smoothly achieved in the fitting portion 7 with one touch, and once set, the fitting is stable as it is. It was confirmed that an appropriate working seal relationship could be maintained.
[0031]
【The invention's effect】
According to the present invention as described above, the pipe joint used in the existing pipeline does not block or block the flow of fluid in the pipe in a case where leakage occurs due to a life limit due to aging and the like. That is, while the operation or work as a pipeline is continued, the leakage is appropriately prevented, and the repair is carried out smoothly and accurately under the condition of maintaining the expansion and contraction flexible action. Repair work that visually and acoustically confirms the state of leakage, and can be used as it is as an expansion joint, and its seal setting state is also stable. This is an invention with a large effect.
[Brief description of the drawings]
FIG. 1 is an end view showing an example of an expansion joint mechanism according to the present invention in a partially cutaway state.
FIG. 2 is a partially cut-away side view of the one shown in FIG. 1;
FIG. 3 is a partially cutaway side view of another embodiment according to the present invention in which a repair housing adapted to the form of an existing joint is employed.
FIG. 4 is a cross-sectional view showing one preferred embodiment of an elastic ring material according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Repair housing part 5 Seal material 6 Joint part 6a Joint part 7 Fitting part 8 Square recess 9 Elastic ring material 10 Existing pipe part 11 Existing pipe 13 Existing pipe joint bolt 14 Existing pipe flange part 15 Housing end plate 16 Boss-shaped projection 17 Recessed part 18 Corner-shaped intermediate part 19 Corner-shaped projection 19a Corner-shaped projection

Claims (6)

A repair housing is covered with a repair part such as a joint part in the existing pipe line body, and a joint part having a seal material interposed between the repair housing and the existing pipeline is formed. A method for repairing a telescopic flexible tube, comprising forming a connection repair relationship between an existing pipeline and a repair housing under the sealing condition according to (1). The method for repairing a telescopic flexible tube according to claim 1, wherein a repair housing separately manufactured at a construction site or the like is employed. A repair housing corresponding to the cross-sectional shape of the joint in the existing pipeline; and a connecting means between a tightening seat formed at an end of the repair housing and the pipeline, and an axial direction of the repair housing. A telescopic flexible pipe joint mechanism for repair, wherein a flange body is attached to both ends and an elastic ring is disposed between the flange body and the repair housing. 4. The telescopic flexible pipe joint mechanism for repair according to claim 3, wherein parallel end plates are provided at both ends of the repair housing. 4. The repairable telescopic flexible pipe joint mechanism according to claim 3, wherein crossed end plates are disposed at both ends of the repair housing. The cross section of the elastic ring interposed between the flange body and the repair housing has a joint protruding part for the seal part to be joined to the sealant, and at the corner between the existing pipe outer surface and the split repair housing outer surface. The telescopic flexible pipe joint mechanism for repair according to any one of claims 3 to 5, wherein an exposed intermediate projection is formed.

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