JP6619988B2 - Method for reversing pipe lining material and pipe lining material - Google Patents

Description

  The present invention relates to a method for reversing a pipe liner and a pipe liner. In particular, when repairing an aged existing pipe, at least a reinforcing cylindrical body is provided inside the airtight cylindrical body, and the airtight cylindrical body and the reinforcing cylindrical body have different elongation in the cylinder length direction. The present invention is characterized in that it is possible to easily and appropriately mount the pipe lining material inside the existing pipe by inverting the inner and outer surfaces of the pipe lining material made of the material.

  Conventionally, as a method of repairing existing pipes such as aging water and sewage pipes and agricultural water pipes, in Patent Documents 1 and 2, glass fiber is placed inside an airtight cylindrical body covered with a resin film. One end of a pipe lining material in which one or more reinforcing cylindrical bodies made of nonwoven fabric are provided and the reinforcing cylindrical body is provided inside the airtight cylindrical body in this way. In this state, fluid pressure is applied to the pressure vessel, and the pipe lining material is passed through the base to which the end of the pipe lining material is fixed. The inside of the pressure vessel is sent out while reversing the inner and outer surfaces, and the pipe lining material thus sent out is attached to the inner peripheral surface of the existing pipe, and the existing pipe is repaired with this pipe lining material. Things are shown.

  And in what is shown by patent documents 1 and 2, an airtight cylindrical body and a reinforcement cylindrical body are put together and opened to the mouthpiece of a pressure vessel in one end part of the above-mentioned liner material for pipes. In this state, fluid pressure is applied to the pressure vessel, and the end of the pipe lining material is passed through the base, and the pipe lining material is sealed with an airtight cylindrical body and a reinforcing cylindrical body. Together, the pipe lining material is fed out while being reversed.

  Here, when the inner and outer surfaces of the pipe lining material are reversed and attached to the inner peripheral surface of the existing pipe as described above, the diameter of the reinforcing cylindrical body provided inside the airtight cylindrical body is set to the airtight cylinder. It is necessary to make the diameter larger than the diameter of the cylindrical body, and the reinforcing cylindrical body made of glass fiber or non-woven fabric generally has a large thickness and a small elongation.

  Then, as described above, the airtight cylindrical body and the reinforcing cylindrical body are joined together, and the end of the pipe lining material is fixed to the base of the pressure vessel, and the airtight cylindrical body and the reinforcing cylindrical body are When the pipe lining material is fed from the inside of the pressure vessel through the base while inverting the inner and outer surfaces, the airtight cylindrical body and the reinforcing cylindrical body are led into the base while being reversed. The thickness of the entire pipe lining material passing through the inside of the base became thick, and it was very difficult to feed the pipe lining material through the base while inverting the inner and outer surfaces of the pipe lining material.

  For this reason, in order to send out while reversing the inner and outer surfaces of the pipe lining material as described above, it is necessary to greatly increase the fluid pressure acting in the pressure vessel, which increases the size of the device and reduces the equipment cost. There were problems such as high prices.

JP 2012-86386 A JP 2014-113732 A

  This invention makes it a subject to solve the above problems in the case of repairing an aged existing pipeline.

  That is, in the present invention, when repairing an aged existing pipe, at least a reinforcing cylindrical body is provided inside the airtight cylindrical body, and the airtight cylindrical body and the reinforcing cylindrical body have a cylinder length. An object of the present invention is to easily and appropriately perform an operation of inverting the inner and outer surfaces of a pipe lining material made of materials having different directions of elongation and mounting the pipe lining material in an existing pipe.

  In the method of reversing a pipe lining material according to the present invention, in order to solve the above-described problems, at least a reinforcing cylindrical body is provided inside the airtight cylindrical body, and the airtight cylindrical body and the reinforcement are provided. In the tube lining material reversing method for inverting the inner and outer surfaces of the pipe lining material, which is made of a material whose elongation in the cylinder length direction is different from that of the tubular body for pressure, one end of the airtight cylindrical body is pressurized While fixing it in the state opened to the mouthpiece of the container, one end portion of the reinforcing cylindrical body protrudes from the distal end portion of the opened airtight cylindrical body in the reverse feeding direction and is fixed. In this state, fluid pressure was applied to the pressure vessel, and the inside and outside surfaces of the pipe lining material were fed out from the pressure vessel through the base.

  In this way, one end of the airtight cylindrical body is fixed in a state where the end of the airtight cylindrical body is opened to the base of the pressure vessel, while one end of the reinforcing cylindrical body positioned inside the airtight cylindrical body. Is fixed by projecting in the reverse feed direction from the tip of the opened airtight cylindrical body, and in this state, fluid pressure is applied to the pressure vessel and the tube is passed through the base from the pressure vessel. When the lining material is sent out, since the end of the reinforcing cylindrical body is in a state of passing through the base, only the airtight cylindrical body is sent out while being reversed at the base part, and in the base part The overall thickness of the pipe lining material that is sent out after being inverted becomes thinner than in the prior art.

  Here, in the method of reversing a pipe lining material according to the present invention, after one end of the airtight cylindrical body is opened and fixed to a base of a pressure vessel, a fluid pressure is put into the pressure vessel. The airtight cylindrical body is fed out for a predetermined length while reversing the airtight cylindrical body from the base having the end fixed, and one end of the reinforcing cylindrical body is fed out. It can be made to protrude from the front-end | tip part of a body, and it can be made to fix so that the edge part of the reinforcement cylindrical body protruded from the front-end | tip part of an airtight cylindrical body may be reversed.

  Further, when the end portion of the reinforcing cylindrical body protruding from the tip portion of the airtight cylindrical body is fixed so as to be reversed as described above, the reinforcement protruded from the front end portion of the airtight cylindrical body. Incisions can be provided along at least two locations along the protruding direction of the end portion of the cylindrical body for use, and the end portions of the reinforcing cylindrical body can be fixed so as to be reversed at the cut portions.

  Further, in providing the cut along the protruding direction at the end of the reinforcing cylindrical body protruding from the tip of the airtight cylindrical body in this way, the above-mentioned cut is reversed and sent out by the airtight cylinder It is preferable to provide it on both sides of the reinforcing cylindrical body that is pressed and flattened by the cylindrical body.

  Further, in the pipe lining material according to the present invention, as the pipe lining material used in the above-described method for reversing the pipe lining material, at least a reinforcing cylindrical body is provided inside the airtight cylindrical body, and the above airtightness The cylindrical body and the reinforcing cylindrical body are made of materials having different elongations in the cylinder length direction.

Further, the above examples of the tube for the lining material, at least two places of the end portion of the reinforcing tubular member that protrudes from the dispensing direction leading end portion of the airtight cylindrical body, provided in advance incisions along the projecting direction It was was to use a thing.

  In the method for reversing a pipe lining material according to the present invention, as described above, one end of the airtight cylindrical body is fixed in a state of being opened to the base of the pressure vessel, while the inside of the airtight cylindrical body is fixed. One end portion of the reinforcing cylindrical body located at the end is fixed by projecting in the reverse feed direction from the distal end portion of the opened airtight cylindrical body, and in this state, the fluid is introduced into the pressure vessel. Since the pressure is applied and the pipe lining material is sent out from the inside of the pressure vessel through the base, only the airtight cylindrical body is sent out while being inverted at the base part, and is sent out after being reversed at the base part. The total thickness of the pipe lining material is significantly thinner than before, and when the pipe lining material is fed from the inside of the pressure vessel through the base and the pipe lining material is reversed, the fluid pressure is applied to the pressure vessel. Without increased as in the prior art, it is possible to feed properly by inverting the tube for the lining material.

  In addition, in the inner portion of the base, as shown by the arrow in FIG. 8, conventionally, the space through which the pipe lining material before inversion passes is narrow, but in the present invention, the space can be expanded by the thickness of the reinforcing lining material. Therefore, the frictional resistance generated between the fixed lining material and the passing lining material, that is, the force for braking the reversal, is greatly reduced, and the fluid pressure can be made lower than before in the whole reversing operation. Therefore, since it is not necessary to apply excessive force to the pressure vessel, the thickness of the pressure vessel can be suppressed, equipment costs can be greatly reduced, and the reversing operation can be performed smoothly. It becomes.

  As a result, in the method for reversing a pipe lining material according to the present invention, when repairing an aged existing pipe, at least a reinforcing cylindrical body is provided inside the airtight cylindrical body, and the airtight cylindrical body and It is possible to easily and appropriately perform the work of inverting the inner and outer surfaces of the pipe lining material made of a material having a different length in the cylinder length direction from the reinforcing cylindrical body and mounting the pipe lining material in the existing pipe. .

It is the schematic explanatory drawing which showed the structure of the lining material for pipes used in the inversion method of the lining material for pipes in embodiment of this invention. In the method for reversing a tube lining material according to the above embodiment, the tube lining material impregnated with a thermosetting resin liquid is accommodated in a pressure vessel in a state of being wound around a reel, and airtightness at one end side of the tube lining material is performed. It is a schematic sectional explanatory drawing which showed the state which fixed and opened the edge part of the property cylindrical body to the nozzle | cap | die of a pressure vessel. In the reversing method of the pipe lining material in the above-described embodiment, a predetermined length is obtained while reversing the inner and outer surfaces of the airtight cylindrical body in the pipe lining material from the base of the pressure vessel to which the end of the airtight cylindrical body is fixed. FIG. 5 is a partially enlarged cross-sectional explanatory view showing a state in which the distal end portion of the reinforcing cylindrical body is protruded by a predetermined length from the distal end portion of the airtight cylindrical body. In the reversing method of the pipe lining material in the above embodiment, a state is shown in which two cuts are provided along the protruding direction at the distal end portion of the reinforcing cylindrical body protruding from the distal end portion of the airtight cylindrical body. A) is a partially enlarged sectional explanatory view on the side surface side, and (B) is a schematic explanatory view on the front side. In the reversing method of the pipe lining material in the above-described embodiment, the tip portions of the reinforcing tubular bodies divided by the two cuts are reversed so as to be folded back toward the outside of the airtight tubular body, and pressure is applied. It is a partial expanded sectional explanatory view which showed the state fixed to each holding member provided in the radial direction outward from the nozzle | cap | die of the container. In the method for reversing a pipe lining material in the above embodiment, a partial enlargement showing a state in which a pipe lining material is fed out while reversing the inner and outer surfaces of the pipe lining material by feeding the pipe lining material from the pressure vessel through a base. FIG. FIG. 5 is a schematic cross-sectional explanatory diagram showing a state in which the pipe lining material that has been reversed and sent out is introduced into an existing pipe in the pipe lining material reversal method according to the embodiment. Partial enlargement showing a state in which the inner and outer surfaces of the pipe lining material are reversed from the base of the pressure vessel in which the ends of the airtight cylindrical body and the strong cylindrical body are fixed in the conventional method of inverting the pipe lining material. FIG.

  Hereinafter, a pipe lining material reversal method and a pipe lining material according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The pipe lining material reversal method and pipe lining material according to the present invention are not limited to those shown in the following embodiments, and can be implemented with appropriate modifications within the scope not changing the gist of the invention.

  In this embodiment, as shown in FIG. 1, a reinforcing tubular body 12 is provided inside the airtight tubular body 11 as the pipe lining material 10, and the airtight tubular body 11 and the reinforcing tubular body are provided. The shape body 12 is made of a material having a different elongation in the cylinder length direction.

  Here, as the airtight cylindrical body 11, in this embodiment, a thermoplastic resin such as polyethylene, polypropylene, nylon, or polyester is formed on the outer surface of the cylindrical woven fabric 11 a woven with general-purpose fibers such as polyester fibers. What is provided with an airtight cylindrical coating 11b made of is used.

  Further, as the reinforcing cylindrical body 12, in this embodiment, a glass mat in which a roving cloth made of glass fiber and a nonwoven fabric are laminated on the outer surface of a cylindrical woven cloth 12a woven with polyester fiber or the like is used as a cylinder. The sheet is provided with a cylindrical reinforcing sheet 12b that is bent so as to be shaped and overlaps both ends. In the cylindrical reinforcing sheet 12b, both end portions of the glass mat folded and overlapped so as to have a cylindrical shape are joined with a hot melt adhesive or the like along the cylindrical length direction of the cylindrical reinforcing sheet 12b. It can be made to adhere. Further, as the reinforcing cylindrical body 12, a structure in which a plurality of layers of the cylindrical woven fabric 12a and the cylindrical reinforcing sheet 12b are alternately provided can be used. As the reinforcing member of the cylindrical reinforcing sheet 12b, so-called super fibers such as glass fibers, aramid fibers, and carbon fibers are suitable, and those processed into a cloth or a mat are used. Moreover, as a use aspect, you may use the cylindrical reinforcement sheet | seat 12b which overlaps the both ends of the above-mentioned sheet | seat, and is a cylindrical body whose width direction is seamless from the beginning. .

  Here, in this embodiment, the inner and outer surfaces of the pipe lining material 10 are sent out while being inverted, and the inverted pipe lining material 10 is introduced into an existing pipe P such as a water and sewage pipe or an agricultural water pipe, and then inverted. When the existing pipe P is repaired by the pipe lining material 10, the above-mentioned pipe lining material 10 is reversed in consideration of the distance between the existing pipe P and the pressure vessel 20 installed in the field, the depth of the shaft / manhole, and the like. The pipe lining material 10 is impregnated with a thermosetting resin liquid so as to remove the portion of the required length from one end side to be started. In addition, when impregnating the thermosetting resin liquid into the pipe lining material 10 in this way, the thermosetting resin liquid is injected into the pipe lining material 10 and the thermosetting resin liquid is injected as described above. The formed pipe lining material 10 can be squeezed by a nip roller (not shown).

  Then, the pipe lining material 10 impregnated with the thermosetting resin liquid as described above is accommodated in the pressure vessel 20 while being wound around the reel 21 as shown in FIG. A state in which the airtight cylindrical body 11 on one end side of the pipe lining material 10 not impregnated with gas is opened, and an end of the airtight cylindrical body 11 is annularly opened in the base 22 of the pressure vessel 20. The end portion of the reinforcing cylindrical body 12 is exposed through the end portion of the airtight cylindrical body 11 thus opened.

  Next, with the end of the airtight cylindrical body 11 opened and fixed to the base 22 of the pressure vessel 20, the compressed air introduction port 23 provided in the pressure vessel 20 enters the pressure vessel 20. Compressed air is introduced, and the pipe lining material 10 is made to invert the inner and outer surfaces of the airtight cylindrical body 11 in the pipe lining material 10 through the base 22 by the fluid pressure by the compressed air as shown in FIG. A predetermined length is sent out from the base 22. In this way, the reinforcing cylindrical body 12 inside the airtight cylindrical body 11 is sent out from the base 22 without being inverted, and this reinforcement is made more than the tip of the airtight cylindrical body 11 sent out while being inverted. The tubular body 12 is almost twice as long as the base 22, and the reinforcing tubular body 12 protrudes from the distal end of the airtight tubular body 11.

  Then, at the distal end portion of the reinforcing cylindrical body 12 protruding from the distal end portion of the airtight cylindrical body 11 as shown in FIGS. After the notches 12c are provided along the protruding direction on both sides of the reinforcing tubular body 12 that is pressed and flattened by the elastic tubular body 11, they are divided by the two notches 12c on the both sides. Each tip portion of the reinforcing cylindrical body 12 is inverted so as to be folded back toward the outside of the airtight cylindrical body 11, and each tip portion of the reinforcing cylindrical body 12 thus inverted is shown in FIG. As shown in FIG. 4, the holding members 24 are fixed to the holding members 24 provided radially outward from the cap 22 of the pressure vessel 20. In this embodiment, the notches 12c are provided on both side portions of the reinforcing cylindrical body 12 that is pressed and flattened by the airtight cylindrical body 11 that has been reversed and sent out as described above. However, the number and position of the notches 12c provided at the distal end portion of the reinforcing tubular body 12 protruding from the distal end portion of the airtight tubular body 11 are not particularly limited.

  Next, in the state where the tip end portion of the reinforcing cylindrical body 12 inverted as described above is fixed to each holding member 24 provided radially outward from the base 22 of the pressure vessel 20, the compressed air is used. Compressed air is introduced into the pressure vessel 20 from the introduction port 23, and the pipe lining material 10 is sent out from the pressure vessel 20 through the base 22 as shown in FIG. In the portion 22, the airtight tubular body 11 is reversed and the reinforcing tubular body 12 fixed by the holding member 24 is reversed, so that the inner and outer surfaces of the pipe lining material 10 are reversed. The pipe lining material 10 is fed out while reversing.

  Here, in this embodiment, the incisions 12c are provided on both sides of the reinforcing cylindrical body 12 that is pressed and flattened by the airtight cylindrical body 11 that has been reversed and sent out as described above. Therefore, as described above, the load applied when the pipe liner 10 is sent out from the pressure vessel 20 through the base 22 and the airtight cylindrical body 11 is reversed at the base 22 is reduced. As described above, the pipe lining material 10 can be easily sent out while the inner and outer surfaces of the pipe lining material 10 are reversed.

Further, the airtight cylindrical body 11 and the reinforcing cylindrical body 12 are made of materials having different elongations in the cylinder length direction.
In this embodiment, since the general-purpose fiber is used for the airtight cylindrical body 11 and the super fiber is used for the reinforcing cylindrical body 12, the extension in the cylinder length direction is usually the airtight cylindrical body. 11 is large, and the reinforcing cylindrical body 12 is small.

Then, at the tip end of the reversal, the lengthening action due to the difference in the elongation of the constituent fibers, that is, the reinforcing cylindrical body 12 having a small elongation serves to suppress excessive elongation of the airtight cylindrical body 11 having a large elongation. . In other words, when excessive talmi is generated in the reinforcing cylindrical body 12, the airtight cylindrical body 11 functions to push and stretch the talmi from the inside.
As a specific event, the pipe lining material 10 wound around the reel 21 may be bent due to the difference between the inner and outer circumferences of the winding shaft. This crease becomes prominent in the reinforcing tubular body 12 having a small elongation in the cylinder length direction. However, such crease can be easily released by the lengthening action, and the inner surface of the lining material after repairing The finish is smooth.
Also from the example of this event, it is desirable that a cylindrical body with a small extension in the cylinder length direction is disposed on the inner surface side of the pipe lining material 10 before inversion. Even if it is arranged on the inner surface side, the effect is produced.
Further, when the difference in elongation in the cylinder length direction is 5% or more, the effect becomes more remarkable.

  Then, as shown in FIG. 7, the pipe lining material 10 that is reversed and sent out as described above is introduced into the existing pipe P, and the reinforcing tubular body 12 in the pipe lining material 10 is introduced into the existing pipe P. The airtight cylindrical body 11 in the pipe lining material 10 is positioned on the inner peripheral side.

  Next, after the pipe lining material 10 is installed in the existing pipe P over the entire length, the thermosetting resin liquid impregnated in the pipe lining material 10 is cured in the existing pipe P, and thus the thermosetting resin liquid is cured. The existing pipe P is repaired by the pipe lining material 10 thus made. As a curing means, a heating method using steam or a normal temperature method for maintaining a pressure holding state is adopted.

  In this embodiment, each tip of the inverted reinforcing cylindrical body 12 is fixed to each holding member 24 provided radially outward from the base 22 of the pressure vessel 20. Alternatively, only the cylindrical reinforcing sheet 12b of the reinforcing cylindrical body 12 may be fixed to each holding member 24, and the cylindrical woven fabric 12a may be fixed on the outer surface of the cylindrical reinforcing sheet 12b by taping or the like.

  In addition, the protrusion 12c is provided at the tip of the reinforcing cylindrical body 12 after the tip of the reinforcing cylindrical body 12 protrudes from the tip of the airtight cylindrical body 11 by a predetermined length. As the tube lining material 10, a tube in which a cut 12 c is provided in advance at the end of the reinforcing cylindrical body 12 can be used. By doing so, it is possible to eliminate the risk of damaging the airtight cylindrical body 11 due to a human error during a cutting operation using a cutter or the like. This is particularly effective when super fibers such as glass fibers and aramid fibers that are difficult to cut are used.

  In addition, since the tubular woven fabric 12a of the reinforcing tubular body 12 is used for protecting the tubular reinforcing sheet 12b that is a strength layer, the necessity of use of the tubular woven fabric 12a of the existing tubular P to be repaired is determined. It may be determined appropriately from the situation.

10: Pipe lining material 11: Airtight tubular body, 11a: Tubular woven fabric, 11b: Tubular coating 12: Reinforcing tubular body, 12a: Tubular woven fabric, 12b: Tubular reinforcing sheet, 12c: Cut 20: Pressure vessel 21: Reel 22: Base 23: Compressed air inlet 24: Holding member P: Existing pipe

Claims (5)

  A tube lining material comprising at least a reinforcing cylindrical body inside an airtight cylindrical body, wherein the airtight cylindrical body and the reinforcing cylindrical body are made of materials having different elongation in the cylinder length direction. In the reversing method of the tube lining material for reversing the inner and outer surfaces, one end of the airtight cylindrical body is fixed in a state of being opened to a base in the pressure vessel, and one of the reinforcing cylindrical bodies is fixed. The end portion of the gas-tight cylindrical body is fixed by projecting in the reverse feed direction from the tip end portion of the opened airtight cylindrical body, and in this state, fluid pressure is applied to the pressure vessel. A method for reversing a pipe lining material, wherein the inner and outer surfaces of the pipe lining material are sent out while being reversed through the base.   2. The method of reversing a pipe lining material according to claim 1, wherein after one end of the airtight cylindrical body is opened and fixed to a base in a pressure vessel, a fluid pressure is applied to the pressure vessel. The airtight cylindrical body is fed out by a predetermined length while acting to reverse the airtight cylindrical body from the base with the end fixed, and the one end of the reinforcing cylindrical body is fed out. A method for reversing a tube lining material, wherein the tube lining material is fixed so as to be reversed by projecting from the distal end portion of the airtight tubular body and inverting the end portion of the reinforcing tubular body projecting from the distal end portion of the airtight tubular body.   3. The method for reversing a pipe lining material according to claim 2, wherein incisions are provided along at least two locations along the protruding direction at the end of the reinforcing cylindrical body protruding from the tip of the fed airtight cylindrical body. A method for reversing a pipe lining material, wherein the end of the reinforcing cylindrical body is fixed so as to be reversed at the cut portion.   In the reversing method of a pipe lining material according to claim 3, in providing a cut along the protruding direction at the end of the reinforcing cylindrical body protruding from the tip of the fed airtight cylindrical body, A method for reversing a pipe lining material, characterized in that the incisions are provided on both sides of a reinforcing tubular body that is flattened by being pressed by an airtight tubular body that has been fed in reverse. A pipe lining material used in the method for reversing a pipe lining material according to claim 1, wherein at least a reinforcing cylindrical body is provided inside the airtight cylindrical body, and the airtight cylindrical body and the reinforcing material are provided. tubular body and is formed is of a different material elongation of the tube length direction Rutotomoni, cut in at least two places of the end portion of the reinforcing tubular member that protrudes from the dispensing direction leading end portion of the airtight cylindrical body A lining material for a pipe, characterized by being provided along a protruding direction .

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