JP2005201374A - Pipe line covering method and complete materials set for covering tubular body used for repair or the like of existing pipe line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To repair a pipe line without cutting or replacing an existing tubular body. <P>SOLUTION: Cylindrical body segments 20 are connected with each other at an outer peripheral side of the tubular body 9 as an outer cylindrical body in order to solve the problem by partially covering an existing pipe. A sealing ring body 30 is inserted along the whole circumference against a circular gap between the both. After a sealing function of the circular gap is generated by operating a one-sided fastening means, a locking member 40 is mounted on an outer bracket 24 arranged on each end edge rectangular to an axial direction of the outer cylindrical body for each cylindrical body segment 20. When the outer cylindrical bodies are assembled, an outer bracket 26 arranged on each end edge parallel to an axial direction of the outer cylindrical body for each cylindrical body segment 20 is temporarily measured and stopped, and then, each end edge parallel to an axial direction of the outer cylindrical body for each cylindrical body segment 20 is welded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a pipe covering method suitable for repairing existing pipes and the like, and a set material (kit) for covering a tubular body used therefor, in particular, without laying down pipes or replacing members, Further, the present invention relates to a pipe covering method and a set of materials for covering a tubular body used in the pipe covering method, which can be applied without stopping the flow.
In addition, the term “tubular body” in the present application indicates not only a tube body but also various hollow materials constituting a flow path of a pipe line including a pipe joint and the like.

  Pipes that send fluids such as water over long distances are constructed by connecting tubular bodies such as steel pipes, resin pipes, and fume pipes. For example, they are buried in the soil, or the road surface is turned over, sometimes over the air. Installed. As a connection method between the tubular bodies, a flange method and a pipe joint utilization method excellent in fluid sealing performance and workability are provided. In the former flange method (see, for example, Patent Document 1), when the flanges at the ends of the tubular body are opposed to each other and fastened, a ring plate-shaped rubber packing is usually arranged as a seal member between the flange surfaces. . In the latter pipe joint (see, for example, Patent Document 2), an outer cylinder is loosely fitted in a connecting portion between tubular bodies, a rubber packing is inserted and arranged in both annular gaps, and further compressed in the axial direction. Thus, the radial pressing is caused to seal the tubular body connecting portion.

Any method can be used for the new installation of pipes, but when repairing a part of existing pipes, the former requires time to align the dimensions for proper fitting of the flanges. Since it can be applied even if the end portions are somewhat apart from each other, it is often used for repairing existing pipelines.
In this case, for example, first, a short axial section including a damaged portion is cut out from the tubular body to be repaired, and instead, a replacement tubular body slightly shorter than the section is arranged. Alternatively, two sets of pipe joints are loosely fitted to the tubular body left in the existing pipeline, and then the rubber packing is compressed after the two sets of pipe joints are aligned with the two main connection portions. This completes the repair by making a sealed connection.

JP-A-63-149491 JP-A-8-42767

However, in such a conventional pipe covering method, since the existing pipe is cut, it is necessary to temporarily stop the transportation of the fluid. Further, a large amount of fluid flows out from the cut portion, or a foreign substance is mixed into the flow path. Careful repair work must be performed to prevent problems such as damage. For this reason, the work burden is large. The same applies to the case where a branch pipe is added to the existing pipe in addition to the pipe repair.
Therefore, in order to be able to perform construction without cutting or replacing an existing tubular body, specifically, a pipe covering method in which pipe repairing is completed by partially covering an existing pipe. Proposing is a technical challenge. It is also a technical problem to provide a set material for covering a tubular body suitable for such a pipe covering method.

  The pipe covering method according to the present invention (initial claim 1) was devised to solve such a problem, and the pipe covering method for covering a short section of an existing pipe pipe in a sealed state. A covering segment is formed by assembling a cylindrical segment having a form obtained by vertically dividing a cylindrical body having a size that can be loosely fitted into the tubular body constituting the pipe line by mutual joining at an outer periphery of the tubular body. On the other hand, a pair knitting to form a packing belt made of an elastomer provided with a group of bolt insertion holes and this packing belt rounded into a ring shape in the axial direction of the ring shape A packing clamping material provided with one-side fastening means capable of bolt fastening by operation from one direction to each of the pair-knitted ring plate segments having a configuration in which the ring plate is divided in the circumferential direction, the outer cylinder forming position of Next, the two sealing ring bodies are formed by sandwiching and assembling the whole circular body that surrounds the tubular body, and then the outer cylindrical body is positioned in the covering target section of the existing pipeline. And the packing member in the sealing plug ring body by operating the one-side fastening means after the sealing plug ring body is integrally positioned at both ends in the axial direction in the annular gap formed between the tubular body and the tubular body. By pinching the belt in the axial direction of the ring body, the radial dimension of the ring body of the packing belt is increased to produce a sealing function, and further, the outer cylinder body is dispersed at a plurality of locations in the circumferential direction at both ends. A locking member for preventing deviation of the sealing plug ring body from the annular gap is attached.

In the present application, “one-side fastening means” means that a fastening bolt is incorporated, and a fastening bolt or a nut that is screwed to the fastening bolt to actuate the packing clamping material disposed on both sides of the packing belt. This means a fastening means that can perform a bolt fastening function only by operating from one side.
The “packing belt” can be used as long as it conforms to the outer peripheral surface of the tubular body. However, it is desirable that the “packing belt” is previously curved with a curvature corresponding to the diameter of the tubular body.

  The set of materials for covering a tubular body of the present invention (initial claim 2) is a set of materials for covering a tubular body for covering a short section in the axial direction of the tubular body constituting the pipe line in a sealed state, One set of metal cylinder segments having a form in which the outer cylinder is vertically divided to form an outer cylinder that is loosely fitted as a covering housing on the outer peripheral side of the covering target section of the tubular body. And an elastomer made with a bolt insertion hole group for forming a ring member for a sealing plug that is inserted and distributed over the entire circumference in an annular gap generated between the tubular body and the outer cylinder body loosely fitted thereto. Pair knitted ring plate segment having a configuration in which a pair knitted ring plate is divided in the circumferential direction for mounting, which serves as a means for pinching the packing belt rolled into a ring shape in the axial direction of the ring shape. One way to each Characterized in that it comprises the two sets in the sealed ring member and a packing squeezing materials which bolting is deployed one-sided fastening means that allows the operation.

Furthermore, the set of materials for covering a tubular body according to the present invention (initial claim 3) is the set of materials for covering a tubular body according to the above-mentioned initial claim 2, and further, the tubular segment is formed into a branched tubular body. It has the form which can form the outer cylinder body which can be loosely fitted.
Moreover, the tubular body covering set material (initial claim 4) of the present invention is the tubular body covering set material according to the above-mentioned initial claim 2, and the tubular segment is a curved tubular body. It has the form which can form the outer cylinder body which can be loosely fitted.
The set of materials for covering a tubular body according to the present invention (initial claim 5) is the set of materials for covering a tubular body according to the above-described initial claims 2 to 4, and is further integrated at least with the tubular segment. A branch pipe is attached.

Moreover, the tubular body covering set material (initial claim 6) of the present invention is the tubular body covering set material according to any one of the initial claims 2 to 5, further comprising the tubular body. Each end edge orthogonal to the axial direction of the outer cylinder of each segment is provided with a locking member foot for attaching a locking member for preventing the sealing ring from deviating from the annular gap. It is characterized by.
Moreover, the tubular body covering set material according to the present invention (initial claim 7) is the tubular body covering set material according to any one of the initial claims 2 to 6, further comprising the packing belt. Is an elastomer having water-swelling expansibility.

Further, the pipe covering method according to the present invention (initial claim 8) is the pipe covering method according to the above-mentioned initial claim 1, and further connects the cylindrical segments on the outer peripheral side of the tubular body. When the outer cylindrical body is formed, an outer bracket is provided at each end of the cylindrical segment parallel to the axial direction of the outer cylindrical body, and the cylindrical segments are aligned and temporarily fastened using this. Then, the cylindrical segments are welded to each other at respective end edges parallel to the axial direction of the outer cylindrical body.
Moreover, the tubular body covering set material of the present invention (initial claim 9) is the tubular body covering set material according to any one of the initial claims 2 to 7, further comprising the tubular body. At each edge parallel to the axial direction of the outer cylinder of each segment, there is a weld groove for welding connection with the other cylinder segment, and an outer part for temporarily fitting with other cylinder segments for welding connection. A bracket is provided.

The pipe covering method according to the present invention (initial claim 10) is the pipe covering method according to the initial claim 1 or claim 8, further comprising an injection port in the outer cylinder. After providing the packing belt with the sealing function of the annular gap, or after attaching the locking members to both ends of the outer cylinder, the filler is introduced into the annular gap from the inlet. It is characterized by injecting.
The tubular body covering set material according to the present invention (initial claim 11) is the tubular body covering set material according to any one of the above-described initial claims 2 to 7 or claim 9. In addition, an injection port for injecting a filler into the annular gap is provided at least integrally with the cylindrical segment.

In such a pipe covering method (initial claim 1) and a set material for covering a tubular body (initial claims 2 to 6) of the present invention, the tubular body is divided by dividing the outer tubular body. Are connected to the outer peripheral side of the tube, and a ring member for sealing plugs is inserted and placed in the annular gap between the two, and further sealed by attaching a locking member to stop the existing tubular body, etc. The short section containing is permanently sealed.
As described above, since the pipes can be repaired by partially covering the existing pipes, the necessary construction can be completed without cutting or replacing the existing pipes.

  Further, in the tubular body covering set material of the present invention (initial claim 7), the packing belt is provided with water absorption, so that the fluid in the pipe leaks into the annular gap with the use of the pipe line after repair. When it comes out, it absorbs the moisture of the fluid and the packing belt expands, which is convenient for maintaining the sealing function of the packing belt.

  Moreover, in the pipe line covering method (initial claim 8) and the tubular body covering set material (initial claim 9) of the present invention, the outer brackets are temporarily attached to each other after temporarily fitting the outer brackets together. By welding each end edge parallel to the cylindrical body axial direction, a strong and airtight outer cylindrical body of the connecting portion can be quickly and reliably built on site.

  Further, in the pipe covering method (initial claim 10) and the tubular body covering set material (initial claim 11) according to the present invention, in addition to preventing the fluid from entering and leaving the damaged portion, repair is performed. There is no stagnation of fluid in the section, and more preferable flow is possible. The filler also serves as a backup means for the sealing function of the packing belt.

  About one embodiment of the set material for tubular body covering and the pipe line covering method of the present invention, the configuration of the set material for tubular body covering 10 will be described with reference to the drawings. FIG. 1 shows the overall structure of a tubular body covering set material 10, (a) is a perspective view of a developed state before mounting, and (b) is a perspective view after mounting. Moreover, FIG. 2 shows the structure of the cylinder segment 20, (a) is a side view, (b) is a front view. 3 shows the structure of the sealing plug ring body 30. (a) is a left side view, (b) is a front view, (c) is a right side view, and (d) is a front view in a rounded state. (E) is an enlarged side view of the basic unit portion in the packing clamping material. 4 shows the structure of the ring plate segment 32, where (a) is a side view and (b) is a front view.

This set of tubular body covering materials 10 (see FIG. 1) includes two (or three) pieces (or three) in order to cover the axial short section including the damaged portion 9a formed in the tubular body 9 constituting the pipe line in a sealed state. Body segment) and two end packing belts 31 and two ends × front and back portions × two ends = 8 for forming two end sealing ring bodies 30 disposed at both ends thereof. A body ring plate segment 32 (see FIG. 3).
The illustrated existing tubular body 9 (see FIG. 1 (a)) is a straight cylindrical steel pipe for water supply, and a small broken portion 9a is formed in the middle portion of the tube, which has been used for many years. It has come to leak.

  The cylindrical body segment 20 (see FIGS. 1 and 2) is formed by welding the two bodies together to form an outer cylindrical body that is loosely arranged as a covering housing on the outer peripheral side of the covering target section of the tubular body 9. For this purpose, a pair of segment main bodies 21 made by splitting a weldable steel pipe or the like whose inner diameter is larger than the outer diameter of the tubular body 9 in the axial direction, and for suspension attached thereto by welding or the like A projecting piece 22, an outer bracket 24, and an outer bracket 26 are provided. The segment main body 21 has a shape in which the outer cylinder is vertically divided and can be welded, and may be obtained by cutting a flange-like member such as a vertically divided cylinder into an appropriate length and bending a flat plate. It may be a thing, and the segment of the form vertically divided into three or more bodies may be connected.

The hanging protrusions 22 are for hanging hooks or ropes in the holes and suspending the tubular segment 20 by a crane or manually, and are usually welded to the central portion of the tubular segment 20.
The outer bracket 24 is a locking member foot for attaching the locking member 40 to the axis orthogonal end edges 23 (ends orthogonal to the outer cylinder axis direction) existing in two places in the segment body 21. Bolts for insertion of bolts are formed, and a large number of them are planted by welding or the like in a radially dispersed arrangement with respect to the outer peripheral surface of the axis orthogonal end edge 23 of the segment body 21.

The outer bracket 26 has two axial parallel edges 25 (edges parallel to the axial direction of the outer cylindrical body) existing on the segment main body 21 before butting the axial parallel edge 25 of the other segment main body 21 with each other. Bolt insertion holes are also formed for each of them, and a plurality of them are welded in a dispersed state with respect to the outer surface of the axis parallel edge 25 of the segment body 21. Have been planted.
A welding groove for welding connection with the other cylindrical segment 20 is provided on the axial parallel edge 25 of the segment body 21. Although the specific illustration of the welding groove is omitted, a normal shape such as a V shape, a Y shape, an I shape, or an X shape may be used.

  The sealing plug ring body 30 (see FIGS. 1 and 3) has an annular gap (referred to as “11” in FIG. 6) formed between the tubular body 9 and the outer cylindrical body of the tubular segment 20 loosely fitted thereto. Packing belt 31 for insertion and distribution over the entire circumference of the packing belt 31 and the ring-shaped axial direction of the packing belt 31 (this is the same direction as the axial direction of the tubular body 9 described above). The packing clamping materials 32 to 35 are combined, and the packing belt 31 is clamped in the axial direction by the packing clamping materials 32 to 35, thereby increasing the cross-sectional area, ie, the thickness in the warp direction, on the plane orthogonal to the axis. It is made to produce a sealing plug function.

  The packing belt 31 is formed of a highly elastic elastomer in a string-like body with a curvature suitable for the usage form, and is in the form of an incomplete annular body having a cut for opening when worn. If the cut end 31a protruding and the cut end 31b retracted are brought into contact with each other, the ring shape returns. The radial thickness of the packing belt 31 when it is made annular is formed slightly smaller than the distance in the same direction of the annular gap 11, and a large number of tightening bolt insertion holes (in FIG. None of these fastening bolt insertion holes are formed so that the axial direction of the fastening bolt is the same as the axial direction of the tubular body 9 when the packing belt 31 is mounted in the annular gap 11 to form an annular shape. It is formed in the direction.

  The packing clamping materials 32 to 35 are knitted by the split-derived two bodies × the clamping front and back pair knitting = four ring plate segments 32 and a number of one-side fastening means 33 to 35, and the one-side fastening means 33 to 35. Reference numeral 35 denotes a nut 33, a fastening bolt 34, and a bolt stopper 35. The ring plate segment 32 (see FIG. 4) is manufactured, for example, by subjecting a steel plate to a corrosion-resistant plating on a stamped plate, and, like the packing belt 31, a number of tightening bolt insertion holes are perforated.

  Such a packing clamping material 32 to 35 is coupled to the packing belt 31 to complete the sealing plug ring body 30. Specifically (see FIG. 3 (e)), the paired ring plate segments 32 are arranged on the front and back of the packing belt 31 so that the bolt insertion holes overlap, and the tightening bolts 34 are inserted into the insertion holes, Further, a nut 33 is attached to one end (see FIGS. 3A and 3C).

  When such a sealing plug ring body 30 is mounted in the annular gap 11 around the tubular body 9, the sealing plug ring body 30 can be opened at the cut ends 31 a and 31 b of the packing belt 31 to create a mounting frontage. In addition, when the sealing plug ring body 30 is closed in an annular shape, the ring plate segments 32 become like ring plates on the front and back sides of the packing belt 31 (FIG. 3 (d)). )reference).

  Of the one-side fastening means 33 to 35, the nut 33 and the fastening bolt 34 may be selected and used from commercially available general bolts and nuts as appropriate, or may be manufactured by forging or tapping. The bolt stopper 35 is attached to the head of the tightening bolt 34. The bolt stopper 35 is made of, for example, a short metal rod, and is fixed to the head of the tightening bolt 34 by welding or the like, and enters the annular gap 11 if it is substantially parallel to the packing belt 31. When the direction changes due to rotation or the like, the axial rotation of the tightening bolt 34 is stopped by hitting the outer peripheral surface of the tubular body 9 or the inner peripheral surface of the cylindrical segment 20.

  The locking member 40 (see FIG. 1) is, for example, a strip-shaped piece attached to both ends of the cylindrical segment 20 so that the sealing plug ring body 30 does not deviate from the annular gap 11, and is formed by punching a steel plate with a press, for example. Manufactured with anti-corrosion plating. The same number of locking members 40 as the outer brackets 24 of the cylindrical body segment 20 are used, and one locking member 40 is attached to each of the outer brackets 24.

  A pipe line covering method performed using the tubular body covering set material 10 of this embodiment will be described with reference to the drawings. 5 and 6 show the steps of the pipe covering method, FIG. 5A is a side view of the tubular body 9 to be repaired, and FIG. 5B is a side view immediately before the outer cylinder body 20 is mounted. 5 (c) and 5 (d) are a side view and a front view, respectively, when the outer cylinder 20 is temporarily fixed, and FIGS. 5 (e) and 5 (f) are a side view and a front view, respectively, after the outer cylinder 20 is welded. 6 (a) and 6 (b) are a side view and a front view, respectively, immediately before the sealing plug ring body 30 is mounted, and FIGS. 6 (c) and 6 (d) are a side view and a front view, respectively, when the sealing plug ring body 30 is mounted. 6 (e) is an enlarged side view of one unit of packing clamping pressure material 32 to 35 before tightening, FIG. 6 (f) is an enlarged side view of one unit of packing clamping pressure material 32 to 35 after tightening, FIG. g) and (h) are a side view and a front view, respectively, after the locking member 40 is mounted.

  Here, since the damaged portion 9a is generated in the tubular body 9 and water leaks therefrom, in order to prevent water leakage, the axially short section of the tubular body 9 including the damaged portion 9a is set for tubular body covering. The material 10 is covered in a sealed state. In addition to preparing the above-described set material 10 for covering the tubular body (see FIG. 1 (a)), in order to secure a work space prior to the construction, if the tubular body 9 is installed in the air, the surroundings are cleaned up. When the tubular body 9 is buried in the soil or placed on the ground, the surrounding area is dug out. In any case, the working space to be secured may be narrower than before. Moreover, as long as water leaks out or drops, it is not necessary to stop the flow. If the water leakage is severe, the flow will be stopped.

  When the damaged portion 9a of the tubular body 9 is exposed and work can be performed around it (see FIG. 5 (a)), one tubular segment 20 is moved below the tubular body 9 and another tubular body is moved. The segment 20 is moved onto the tubular body 9 so as to approach from above and below (see FIG. 5B). Then, both axial parallel end edges 25 are brought into contact with each other, and both outer brackets 26 are aligned and overlapped, and then the outer brackets 26 are fastened together with appropriate bolts or the like, so that the upper and lower cylindrical segments 20 are joined together. Is temporarily secured (see FIGS. 5C and 5D). Then, the axial parallel end edges 25 are firmly welded until the weld mark 27 becomes airtight (see FIGS. 5E and 5F). After welding, the outer bracket 26 that is no longer needed is struck down with a hammer or the like. In this way, the pair of cylindrical segments are connected to each other on the outer peripheral side of the tubular body 9, so that a short cylindrical outer cylindrical body is completed and is placed loosely on the outer peripheral side of the tubular body 9.

  When the outer cylinder is formed, the sealing ring 30 is attached to each of both ends (see FIGS. 6A to 6F). Specifically, the sealing plug ring body 30 is opened at the cut ends 31a and 31b (cuts), hung on the outer peripheral surface of the tubular body 9, and then closed annularly, and the packing belt 31 is bonded to the cuts with adhesive. The ring body is prepared as a sealed plug functional body by making it into a full circle (see FIGS. 6 (a) and 6 (b)), and this ring body is made up of the tubular body 9 and the outer cylindrical body (20). It inserts in the cyclic | annular space | gap 11 produced in between (refer FIG.6 (c), (d)).

  Then, the nut 33 is turned to bring the ring plate segment 32 at the opposite position closer (see FIGS. 6E and 6F). When the nut 33 is turned, the tightening bolt 34 begins to rotate along with it, and the bolt stopper 35 moves along with the annular gap 11, but the bolt stopper 35 is immediately moved to the inner peripheral surface of the segment body 21 or the tubular body 9. It interferes with the outer peripheral surface and stops moving. Therefore, the axial rotation of the tightening bolt 34 is also stopped. Thereafter, when the nut 33 is turned, the distance between the opposing ring plate segments 32 is narrowed, whereby the packing belt 31 is pressed in the axial direction, and accordingly the packing belt 31 is packed. Since the cross-sectional area of the packing belt 31 related to the ring-shaped axis orthogonal surface of the belt 31 is increased, the packing belt 31 is pressed against the outer peripheral surface of the tubular body 9 and the inner peripheral surface of the segment body 21. The gap 11 is sealed by the packing belt 31.

  When the packing belt 31 becomes a sealing plug for the annular gap 11, a locking member 40 is mounted on the outside thereof so as to surely prevent it from coming out of the annular gap 11 due to the internal pressure of water leakage. Specifically (see FIGS. 6G and 6H), a total of 16 locking members 40 are prepared and attached to the outer brackets 24 at both ends of the cylindrical segment 20 one by one with appropriate bolts or the like. .

As a result, the damaged portion 9a of the tubular body 9 is covered with the tubular body covering set material 10 in an airtight manner (see FIG. 1 (b)), and water leakage is stopped. Restore.
Thus, in the pipe line covering method using the set material 10 for covering a tubular body, the existing tubular body 9 is not cut or replaced, and the damaged portion 9a can be repaired easily. it can.

  Other embodiments of the tubular body covering set material and the pipe covering method of the present invention will be described with reference to the drawings. FIG. 7 is a longitudinal side view showing the structure of the set material 70 for covering a tubular body and a pipe covering method using the same.

The tubular body covering set material 70 is different from the tubular body covering set material 10 described above in that the upper tubular segment 20 is partially remodeled into a tubular segment 71.
The cylindrical segment 71 is formed by additionally processing the cylindrical segment 20 to form an inlet 72 and a vent 73. The injection port 72 is for injecting the liquid filler 74 into the annular space 11, and the vent 73 can be omitted in the case of non-pressure injection that is simply poured.

In this case, after the tubular body covering set material 70 is mounted on the tubular body 9 in the same manner as the tubular body covering set material 10, the filling material 74 is pressurized and injected from the inlet 72 into the annular gap 11 with the filling tool 75. When the annular gap 11 is filled with the filler 74, the inlet 72 and the vent 73 are sealed at an appropriate time set in relation to curing or cooling solidification. The attachment of the locking member 40 may be performed after the filling material 74 is injected.
The filler 74 is intended to quickly stop fluid leakage and strengthen the sealing function. For example, a reaction-curable urethane resin or thermoplastic EVA (ethylene-vinyl acetate polymer; melted by weak heating and injected). ) Etc. are suitable.

Still another embodiment of the set material for covering a tubular body and the pipe covering method of the present invention will be described with reference to the drawings. FIG. 8 is a perspective view showing a structure of the tubular body covering set material 80 and a pipe covering method using the same.
The tubular body covering set material 80 is different from the above-described tubular body covering set material 10 in order to cover the portion of the T-shaped branch pipe 9b connecting the three tubular bodies 9. Instead of the cylindrical segment 20 mainly composed of the segment main body 21 obtained by vertically dividing the cylinder, a cylindrical segment 81 mainly including a segment main body 82 in a form in which a T-shaped outer cylindrical body is vertically divided is used. This is the point.

The size of the segment main body 82 is determined so that an outer cylindrical body that is slightly larger than the branch pipe 9b is formed by combining the pair of segment main bodies 82 from above and below. Since the segment body 82 has three axially orthogonal end edges 23, the outer bracket 24 is attached to each of the segment body 82. Further, outer brackets 26 are attached to the five axial parallel end edges 25. Thus, the segment main body 82 becomes the cylindrical segment 81.
In this case, in response to the presence of three axially orthogonal end edges 23 in the cylindrical segment 81, three sealing plug ring bodies 30 are used and 24 locking members 40 are used. Construction can be performed in the same manner as described above.
Although the above embodiment relates to a T-shaped branch, it is needless to say that it can be similarly applied to a Y-shaped, cross-shaped, and X-shaped branch.

  Still another embodiment of the set material for covering a tubular body and the pipe covering method of the present invention will be described with reference to the drawings. FIG. 9A is a perspective view of a curved tubular body to be repaired, and FIG. 9B is a perspective view of an outer cylinder temporarily attached thereto.

The tubular body covering set material 90 is different from the above-described tubular body covering set material 10 and 70 in correspondence with the fact that the tubular body 9 is curved (the illustrated example is a so-called shrimp bent tube). ), The cylindrical segment 91 is curved (similarly, it may be a shrimp bent shape).
Specifically, the curvature of the cylindrical segment 91 is determined so that the axis of the cylindrical segment 91 and the axial line of the tubular body 9 substantially overlap not only in the straight portion but also in the curved portion, and the weld mark 27, that is, the axis parallel edge Becomes almost parallel to these axes. Therefore, even if the tubular body 9 is curved, the outer tubular body formed by welding the tubular segments 91 is loosely fitted in a short section including the curved portion, and the sealing plug ring body 30 is further inserted. Therefore, the sealing covering of the section is suitable.

  Still another embodiment of the set material for covering a tubular body and the pipe covering method of the present invention will be described with reference to the drawings. FIGS. 10A and 10B show a place where a set material for covering a tubular body is attached to a straight pipe portion for repair of branch formation instead of repair, wherein FIG. 10A is an external perspective view, and FIG. 10B is a longitudinal side view.

The tubular body covering set material 100 is different from the above-described tubular body covering set material 10 and 70 in that the upper one of the tubular segments that vertically form the outer tubular body is the tubular body segment 101. It is a point. The lower side may remain the cylindrical segment 20.
One end of the branch pipe 102 is welded to the cylindrical segment 101 in advance, and a flange 103 for connecting an extension pipe or the like is provided at the other end of the branch pipe 102.

Such a set material 100 for covering a tubular body is used, for example, when a branch is added to an existing pipeline where there is no branch. Therefore, prior to attachment to the tubular body 9 forming the pipeline, the tubular body 9 is provided. A branch port 9c is perforated at a place where it is desired to branch, and then the tubular segment 101 is attached with the branch tube 102 positioned on the outer peripheral side of the branch port 9c.
The other attachment method is the same as that of the set material 10 for covering the tubular body described above, but in the case where the filler 74 is injected into the annular gap 11 like the set material 70 for covering the tubular body in order to prevent stagnation of the fluid. In order to prevent the added branch flow path from being blocked, it is preferable to use a permanent relay pipe or a temporary rod-shaped mold material extending through the hollow of the branch pipe body 102 and the branch port 9c.

In the case of dividing or joining fluids, another tubular body is connected to the flange 103, and the diameter of the tubular body or the branch port 9c is increased corresponding to the required flow rate. For example, when a meter or the like that does not require a flow is provided, the branch port 9c and the branch pipe body 102 are thin and sufficient, and the flange 103 may be a screw-in type connecting means smaller than that.
In addition, although what is illustrated is a one-branch type upward, it may be branched in another direction, and may be branched into multiple branches or multiple branches.

[Others]
In the above embodiment, the tubular body 9 is a water supply steel pipe. However, the tubular body 9 is not limited thereto, and may be used for an air supply pipe or the like, or may be made of a material other than a steel material such as a resin pipe or a fume pipe. Well, the typical diameter is 200 mm to 1000 mm, but may be other than that, and the typical thickness is 5 mm to 10 mm, but may be other than that.
In the above embodiment, the outer cylindrical body is a steel pipe thicker than the tubular body 9, but the outer cylindrical body is not limited thereto, and other materials (for example, alloy steel such as stainless steel, Hastelloy, etc.) according to the material of the pipe line are used. It may be made of a nickel alloy, a titanium-based metal, or a copper-based metal. The typical difference (diameter) between the inner diameter of the outer cylinder and the outer diameter of the tubular body 9 is 50 mm to 100 mm, but it may be other than that, and the typical thickness of the outer cylinder is 5 mm to 10 mm. The typical length is 300 mm to 800 mm, but other lengths may be used.

In the above embodiment, the division number for dividing the outer cylinder vertically into the cylinder segments 20, 71, 81 is “2”, but the division number may be larger. The number of the hanging protrusions 22 attached to the cylindrical segments 20, 71, 81, the outer bracket 24, and the outer bracket 26 may be larger or smaller. The number and pitch of the tightening bolts 34 in the sealing plug ring body 30 are arbitrary as long as the pinching function can be exhibited.
Examples of the elastomer constituting the packing belt 31 include SBR rubber, CR rubber, EPDM rubber, NBR rubber, urethane rubber, fluororubber, and silicon rubber. And water-absorbing elastomers of the system.

  In the above embodiment, the outer bracket 24 is cited as the locking member footrest, but this is an example, and the locking member footrest may be other than that as long as the locking member can be attached, For example, a locking member mounting hole provided in the cylindrical segment may be used. Further, the shape of the locking member is not limited to a strip shape.

1 shows a structure of a set material for covering a tubular body and a pipe covering method using the same according to an embodiment of the present invention, in which (a) and (b) are perspective views, and (a) is a deployment before mounting. The state, (b) is the state after mounting. The structure of a cylindrical segment is shown, (a) is a side view, (b) is a front view. The structure of the sealing plug ring body is shown, (a) is a left side view, (b) is a front view, (c) is a right side view, (d) is a rolled front view, and (e) is for packing clamping pressure. It is an enlarged side view of the basic unit part in material. The structure of a ring board segment is shown, (a) is a side view, (b) is a front view. About the pipe line covering method using the set material for tubular body covering of the above embodiment, the first half part is shown in the process, (a) is a side view of the tubular body to be repaired, and (b) is immediately before mounting the outer cylinder body. Side view. (C) And (d) is the side view and front view at the time of temporary fixing of an outer cylinder body, respectively, (e) And (f) is the side view and front view after outer cylinder body welding, respectively. The latter half of the above process is shown, wherein (a) and (b) are a side view and a front view, respectively, just before mounting the sealing plug ring body, and (c) and (d) are a side view and a front view when mounting the sealing plug ring body, respectively. Figure, (e) is an enlarged side view of one unit for packing pinching material before tightening, (f) is an enlarged side view of one unit for packing pinching material after tightening, (g) and (h) are respectively related It is the side view and front view after a stop plate mounting | wearing. It is a vertical side view which shows the structure of the set material for tubular body covering, and the pipe line covering method using the same about other embodiment of this invention. It is a perspective view which shows the structure of the set material for tubular body covering, and the pipe line covering method using the same about other embodiment of this invention. The structure of the set material for tubular body covering and the pipe line covering method using the same according to another embodiment of the present invention are shown, (a) is a perspective view of the curved tubular body, and (b) is the outer cylinder body. FIG. About other embodiment of this invention, the structure of the set material for tubular body covering and the pipe line covering method using the same are shown, (a) is a perspective view, (b) is a vertical side view.

Explanation of symbols

9: Tubular body (existing pipe),
9a ... Damaged part (covering target part), 9b ... Branch pipe (covering target part),
10 ... A set of materials for covering the tubular body, 11 ... Annular gap,
20 ... Cylinder segment, 21 ... Segment body,
22 ... projecting piece for suspension, 23 ... edge perpendicular to axis, 24 ... outer bracket,
25 ... Axis parallel edge, 26 ... Outer bracket, 27 ... Welding mark,
30 ... Ring body for sealing plug,
31 ... Packing belt (water-absorbing elastomer),
31a ... protruding cut end (cut), 31b ... retracted cut end (cut),
32 ... Ring plate segment (packing clamping material),
33 ... Nut (one-side bolt fastening member, clamping material),
34: Tightening bolt (one-side bolt fastening member, clamping material),
35 ... Bolt stopper (one-side bolt fastening member, clamping material),
40 ... locking member,
70: A set of materials for covering a tubular body, 71: A tubular segment,
72 ... inlet, 73 ... vent, 74 ... filler, 75 ... filling tool,
80 ... A set of materials for covering the tubular body,
81 ... Cylinder segment, 82 ... Segment body,
90 ... A set of materials for covering a tubular body, 91 ... A tubular segment,
100: A set of materials for covering a tubular body,
101 ... Cylinder segment, 102 ... Branch tube, 103 ... Flange

Claims (11)

  A pipe covering method for covering a short section of an existing pipe line in a sealed state, wherein a tube segment having a vertically divided form of a cylinder body that can be loosely fitted to the tubular body constituting the pipe line is provided. An outer cylindrical body that is assembled into a tubular shape by mutual joining at the outer periphery of the tubular body to form a housing for covering is formed, and on the other hand, an elastomer packing belt provided with a group of bolt insertion holes, and a ring shape. One side that can be bolted to each of the paired ring plate segments having a form in which the paired ring plates are divided in the circumferential direction for clamping the packing belt in the axial direction of the ring shape. Two sealing ring bodies are formed by sandwiching and assembling a packing clamping material provided with fastening means into a full circle sandwiching the tubular body in the vicinity of the outer cylinder forming position. Next, the outer cylindrical body is positioned in the covering target section of the existing pipe line, and the sealing plug ring bodies are integrally positioned at both ends in the axial direction in the annular gap generated between the outer cylindrical body and the tubular body. After that, by operating the one-side fastening means to pinch the packing belt in the sealing plug ring body in the ring body axial direction, the ring body radial dimension of the packing belt is increased to produce a sealing function, Further, a pipe line characterized in that locking members for preventing deviation from the annular gap of the ring member for sealing plugs are attached to both ends of the outer cylinder body in a plurality of locations in the circumferential direction. Covering method.   A set of materials for covering a tubular body for covering a short axial section of the tubular body constituting the pipe line in a sealed state, and loosely arranged as a covering housing on the outer peripheral side of the covering target section of the tubular body Between one set of metal cylinder segments having a configuration in which the outer cylinder is vertically divided, and the tubular body and the outer cylinder loosely fitted thereto. An elastomeric packing belt provided with a bolt insertion hole group for forming a sealing plug ring body to be inserted and distributed over the entire circumference in the generated annular gap, and the ring-shaped axis line of the packing belt rounded into a ring shape One-side fastening means that enables bolt fastening by operation from one direction is provided for each pair of ring plate segments that have a configuration in which the paired ring plates are divided in the circumferential direction for mounting, as a means for clamping in the direction. Shi Tubular body covering worn set of materials, characterized in that the packing squeezing material in the sealed ring member comprises two sets.   The tubular body covering set material according to claim 2, wherein the tubular segment has a form capable of forming an outer tubular body that can be loosely fitted to a branched tubular body.   The tubular body covering set material according to claim 2, wherein the tubular segment has a form capable of forming an outer tubular body that can be loosely fitted to a curved tubular body.   The set-up material for covering a tubular body according to any one of claims 2 to 4, wherein a branch pipe is attached to at least one of the tubular segments.   A locking member foot for attaching a locking member for preventing deviation of the sealing plug ring body from the annular gap is provided at each end of the cylindrical segment perpendicular to the axial direction of the outer cylindrical body. The set material for tubular body covering according to any one of claims 2 to 5, wherein the set material is for covering a tubular body.   The set material for covering a tubular body according to any one of claims 2 to 6, wherein the elastomer constituting the packing belt is an elastomer having water absorbability.   When the cylindrical segments are connected to each other on the outer peripheral side of the tubular body to form an outer cylindrical body, an outer bracket is provided at each edge parallel to the axial direction of the outer cylindrical body of each cylindrical segment, 2. The tube according to claim 1, wherein the cylindrical segments are temporarily bonded to each other, and then the cylindrical segments are welded to each other at respective end edges parallel to the axial direction of the outer cylindrical body. Road covering method.   At each edge parallel to the axial direction of the outer cylindrical body of each of the cylindrical segments, a welding groove for welding connection with the other cylindrical segment and provisional fixing with other cylindrical segment for welding connection are temporarily fixed. An outer bracket is provided for the tubular body covering set material according to any one of claims 2 to 7.   After the injection hole is provided in the outer cylinder and the sealing belt function of the annular gap is generated in the packing belt, or after the locking members are attached to both ends of the outer cylinder, The pipe covering method according to claim 1 or 8, wherein a filler is injected into the annular gap.   The injection port for injecting a filler into the annular gap is provided at least integrally with the cylindrical segment, or any one of claims 2 to 7 or claim 9. The set material for tubular body covering described in 1.

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