JP6139998B2 - Lining material and lining method using the same - Google Patents

Description

  The present invention relates to a lining material that is reversely inserted into a pipe such as a water supply / drainage pipe, and a lining method using the lining material.

  Conventionally, a plurality of elastic tubes each formed in a cylindrical shape are configured as a multiple cylindrical shape, and a cylindrical resin absorbent material that is provided inside and can be impregnated with an adhesive resin. A lining material that covers the inner peripheral surface of a pipe by reversing insertion with fluid pressure from one end so that the resin absorbent impregnated with the adhesive resin is on the outside and the multiple elastic tubes are on the inside is known. . In the lining material inserted into the tube by inversion, the resin absorbent material impregnated with the adhesive resin is brought into close contact with the inner peripheral surface of the tube by the elastic tube expanded by the fluid pressure. In this state, the adhesive resin is hardened, so that the inner peripheral surface of the pipe is lined with a hardened resin with the resin absorbent as a core (see Patent Document 1).

JP 2002-160295 A

  When this type of lining material is inverted and inserted into a tube, the elastic tube does not expand uniformly due to fluid pressure, and the elastic tube expands from a weak part in terms of thickness and shape. A line (striate) extending in the axial direction may occur. If the elastic tube partially expands at the location of the generated muscle, the elastic tube will expand as a whole, and as a result, the elastic tube may burst (puncture) from the muscle portion. Become. In this regard, in the conventional lining material provided with multiple elastic tubes, the muscles generated on the surface of the elastic tube are dispersed to some extent as compared with a single elastic tube, so each elastic tube is partially However, it is difficult to completely prevent the elastic tube from bursting.

  An object of this invention is to provide the lining material which can prevent effectively the burst of the elastic tube which expand | swells at the time of inversion insertion in a pipe | tube, and the lining construction method using the same.

The lining material of the present invention includes a multiple tube in which a plurality of elastic tubes each formed in a cylindrical shape are formed into multiple cylinders, and a cylindrical resin absorption that is provided inside the multiple tubes and can be impregnated with an adhesive resin. A lining that covers the inner peripheral surface of the pipe by being reversely inserted by fluid pressure from one end of the pipe so that the resin absorbent material impregnated with the adhesive resin is on the outside and the multiple tube is on the inside. The multiple tube is characterized in that at least one of the contact surfaces of the elastic tubes that are in contact with each other inside and outside is formed on a frosted glass-like uneven surface having fine unevenness .

According to this configuration, the contact surfaces of the elastic tubes that are in contact with each other have a friction reducing structure that reduces the friction between them, so that the lining material is inverted and inserted by fluid pressure from one end of the tube, and each elastic tube When the tube expands, the elastic tubes constituting the contact surface (friction reducing structure) do not attract each other, and the interlayer slip is smoothly performed between the elastic tubes, and the elastic tubes expand while being slightly displaced from each other in the circumferential direction. Therefore, each elastic tube can take an expansion form equivalent to the expansion in the free state. For this reason, even if a streak is generated in the elastic tube, only a narrow streak is generated in a distributed manner in the circumferential direction, so that the elastic tube does not expand in a biased manner as a whole. Therefore, it is possible to effectively prevent the burst of the elastic tube that expands during the reverse insertion into the tube.
In addition, by forming at least one of the contact surfaces of the elastic tubes that are in contact with each other inside and outside on a rubbed glass-like uneven surface, the contact area between the elastic tubes is reduced, and a friction reducing structure can be configured.
In addition, as for an uneven surface, it is preferable that arithmetic surface roughness Ra is 10 micrometers-60 micrometers.

The lining method of the present invention includes a multiple tube in which a plurality of elastic tubes each formed in a cylindrical shape are formed into a multiple tube shape, and a cylindrical resin absorption that is provided inside the multiple tube and can be impregnated with an adhesive resin. A lining that covers the inner peripheral surface of the pipe by being reversely inserted by fluid pressure from one end of the pipe so that the resin absorbent material impregnated with the adhesive resin is on the outside and the multiple tube is on the inside. A lining method using a material, an impregnation step of impregnating the resin absorbent material with an adhesive resin, and from one end of the tube, the resin absorbent material impregnated with the adhesive resin is on the outside and the multiple tube is on the inside As shown in FIG. 2, after the insertion of the lining material is reversed, the coating process of covering the inner peripheral surface of the pipe with the lining material and the adhesive resin of the lining material coated on the inner peripheral surface of the pipe are cured, Resin up to the end An insertion step of inserting a tensile string into the gap between the collecting material and the multiple tube, and a ring member connected to one end of the inserted tensile string is formed between the resin absorbent material and the multiple tube from one end of the lining material to the other end. It is characterized by comprising a drawing step of pulling the tensile string from the lining material so as to pass through, and a drawing step of drawing out the multiple tube from the inside of the pipe after the drawing step .

According to this structure, construction can be performed without any work trouble by using the lining material that can effectively prevent the burst of the elastic tube that expands during reversal insertion into the tube.
After curing the adhesive resin, it is not always necessary to remove the multiple tube from the inside of the tube. However, if the multiple tube is left inside the tube, the multiple tube will peel off over time and cause clogging of the tube. After the resin is cured, the multiple tube is preferably removed.
Here, the tensile string connected to the ring member is pulled out from the lining material, and the ring member is passed between the resin absorbent material and the multiple tube from one end of the lining material to the other end, thereby absorbing the resin by the ring member. The multiple tube can be peeled off from the resin absorbent material by pushing the material outward and the multiple tube inward. For this reason, compared to the case where one end of the multiple tube is gripped and peeled off while being reversed, the resin absorbent is not pulled inward and prevents the resin absorbent from floating (peeling) from the inner peripheral surface of the tube. can do.

  In this case, it is preferable that the insertion step is performed by inserting a cable-like endoscope having one end of the tension string connected through the gap between the resin absorbent material and the multiple tube from end to end of the lining material.

  According to this configuration, after the coating process, in order to confirm whether or not the lining material is properly coated on the inner peripheral surface of the pipe, the endoscope inserted through the gap between the resin absorbent material and the multiple tube is provided. Since the tensile string can be inserted through the gap between the resin absorbent and the multiple tube, the total number of work steps can be reduced.

Another lining method of the present invention includes a multiple tube in which a plurality of elastic tubes each formed in a cylindrical shape are configured in a multiple cylindrical shape, and a cylindrical shape that is provided inside the multiple tube and can be impregnated with an adhesive resin. The outermost elastic tube is made of a transparent material, and from one end of the tube, the resin absorbent material impregnated with the adhesive resin is on the outside and the multiple tube is on the inside A lining method using a lining material that is inverted and inserted by fluid pressure to cover the inner peripheral surface of the pipe, and an impregnation step for impregnating the resin absorbent material with an adhesive resin, and from one end of the pipe Prior to the coating step, the resin absorbent material impregnated with the resin is inverted and inserted by fluid pressure so that the multiple tube is inside and the inner peripheral surface of the tube is coated with the lining material , Lining material Immersed in the body, the lining material taken out from the liquid was visually observed, and an inspection step of inspecting not empty or pinholes on the outermost side of the elastic tube, comprising the.

If there is a pinhole in the outermost elastic tube, air may enter from the pinhole during the coating process and cause the elastic tube to burst. Is preferred.
Here, by immersing the lining material in the liquid prior to the coating step, if there is a pinhole in the outermost elastic tube, the liquid enters the pinhole, and the lining material is removed from the liquid. Even after removal, since the intruded liquid remains between the outermost elastic tube and the inner elastic tube, the presence or absence of the intruded liquid can be visually recognized through the transparent outermost elastic tube. This makes it possible to reliably confirm whether or not a pinhole is open in the outermost elastic tube.
Even if pinholes are vacant in the innermost elastic tube, it can cause bursting of the elastic tube and floating (peeling) of the resin absorbent from the inner peripheral surface of the tube. It is preferable to confirm the presence / absence of a pinhole in the innermost peripheral elastic tube together with the presence / absence of a pinhole in the outermost elastic tube. In this case, if there is a pinhole in the innermost elastic tube, the adhesive resin penetrates between the innermost elastic tube and the outer elastic tube from the pinhole. The presence or absence of the adhesive resin can be visually recognized through the transparent elastic tube on the outermost peripheral side, and thereby, it can be confirmed whether or not a pinhole is vacant in the elastic tube on the innermost peripheral side.

  In this case, the inspection step is preferably performed after the impregnation step, and the temperature of the liquid is preferably 10 ° C. or lower.

  According to this configuration, when the adhesive resin impregnated in the resin absorbing material in the impregnation step is a two-component curing type composed of the main agent and the curing agent, the lining material is immersed in a liquid of 10 ° C. or lower. Thus, the progress of the curing reaction of the adhesive resin can be delayed. For this reason, even when an adhesive resin having a relatively short curing time is used, the coating process can be appropriately started without proceeding before the coating process, and therefore the adhesive resin having a relatively short curing time. Can be used, and the entire construction time can be shortened.

  In this case, the covering step is performed while adjusting the reverse insertion speed of the lining material by feeding out the string-like body having one end connected to the reverse insertion terminal portion of the lining material at a predetermined speed. It is preferable that a lubricant is applied.

  In this case, the lubricant is preferably composed of silicone oil.

  In the covering step, it is preferable to adjust the reversal insertion speed by placing a reversal speed adjustment rope with one end fixed in order to reversely insert the lining material while appropriately inflating the elastic tube, On the inner peripheral surface of the curved pipe (joint) inside the curve, the elastic tube is located on the feed path of the reversing speed adjusting rope, so the reversing speed adjusting rope in a stretched state is fed while rubbing the elastic tube. However, since the lubricant is applied to the surface of the reversing speed adjusting rope, the reversing speed adjusting rope does not rub the elastic tube strongly at its contact part, and prevents the elastic tube from being pierced by wear. can do.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the lining material which concerns on one Embodiment of this invention, Comprising: (a) is a perspective view of a lining material, (b) is sectional drawing of a lining material, (c) is a miscellaneous drainage pipe, and reverse insertion in this (D) is a cross-sectional view of a drainage vertical pipe and a lining material from which a double tube has been removed by being inverted and inserted into this, and (e) is surrounded by an alternate long and short dash line in FIG. It is an enlarged view of a part. It is a figure which shows the drainage system of the miscellaneous waste water used as the repair object of the lining construction method which concerns on one Embodiment of this invention. It is a figure which shows the lining material which the pinhole vacated in the elastic tube. (A) is a figure which shows the process which reversely inserts a lining material in a miscellaneous drainage standpipe, (b) is an enlarged view of the part enclosed with the dashed-dotted line in FIG. (A). (A) is a figure which shows the line | wire which arose in the elastic tube when the lining material which concerns on this embodiment is reversely inserted, (b) is an elastic tube when the lining material which concerns on a prior art is reversely inserted. It is a figure which shows the produced | generated line | wire. (A) is the figure which has inserted the tension string into the gap between the resin absorbent and the double tube together with the endoscope after the adhesive resin is cured, and (b) ties a ring member to one end of the tension string. It is the figure which inserted the one end part of the double tube in the ring member, (c) is the figure which pulled out the tension cord, (d) is the figure which pulled out the double tube.

  Hereinafter, a lining material and a lining method using the same according to an embodiment of the present invention will be described with reference to the accompanying drawings. The lining material and the lining method according to the present embodiment relate to a technique for rehabilitating a drainage pipe that has deteriorated in an existing multi-story apartment house. In other words, miscellaneous drainage pipes (generally steel pipes) in multi-storey apartment buildings are subject to slime adhesion due to oil and fat contained in miscellaneous drainage, and are subject to corrosion. Therefore, it is necessary to repair miscellaneous drainage pipes. In this lining method, the resin absorbent material impregnated with adhesive resin is inscribed on the inner peripheral surface of the miscellaneous drainage pipe, and a new resin coating (lining layer) is formed to regenerate the miscellaneous drainage pipe. To do.

  As shown in FIG. 1, the lining material 10 is configured in a triple cylindrical shape having a length and a diameter corresponding to the miscellaneous drainage pipe 21 to be rehabilitated, and an outer double tube 11 and a double tube. 11 is provided with a resin absorbent 12 provided inside. The lining material 10 is reversely inserted by air pressure so that the resin absorbent material 12 impregnated with the adhesive resin is on the outer side and the double tube 11 is on the inner side from the upper end of the sewage drainage pipe 21 to be rehabilitated. The inner peripheral surface of the vertical pipe 21 is covered (see FIG. 1 (c)), and after the adhesive resin is cured, only the double tube 11 is pulled out from the miscellaneous drainage vertical pipe 21 (see FIG. 1 (d)). . That is, the resin absorbent 12 that has absorbed the adhesive resin functions as a lining main material that forms a lining layer on the inner peripheral surface of the miscellaneous drainage pipe 21, and the double tube 11 is expanded by air pressure to expand the resin absorbent. It functions as a lining auxiliary material for bringing 12 into close contact with the inner peripheral surface of the drainage vertical pipe 21. Instead of the air pressure, the lining material 10 may be reversely inserted with the pressure or fluid pressure of another gas (for example, inert gas).

  The double tube 11 expands with the introduced air pressure and presses the resin absorbent 12 against the inner peripheral surface of the miscellaneous drainage pipe 21. The double tube 11 is a double tube in which the outer elastic tube 11 a and the inner elastic tube 11 b are stacked inside and outside. It has a cylindrical shape. The outer elastic tube 11a and the inner elastic tube 11b have the same configuration, and are elastic bodies such as synthetic resin and rubber, preferably made of a transparent and hardly adhesive material, and a polyethylene laminate tube can be suitably used. In this embodiment, the elastic tube is doubled, but the elastic tube may be triple or more.

  The powder lubricant 13 is uniformly dispersed in the contact surface between the outer elastic tube 11a and the inner elastic tube 11b, that is, the gap between the inner peripheral surface of the outer elastic tube 11a and the outer peripheral surface of the inner elastic tube 11b. (See FIG. 1 (e)). The antifriction agent 13 is blown from one end of the double tube 11 on the gap between the outer elastic tube 11a and the inner elastic tube 11b. Due to the lubricant 13, the contact surface between the outer elastic tube 11a and the inner elastic tube 11b has a friction reducing structure.

  Instead of the powder lubricant 13, by applying a liquid lubricant 13 such as silicone oil to at least one of the inner peripheral surface of the outer elastic tube 11a and the outer peripheral surface of the inner elastic tube 11b, A friction reducing structure may be configured.

  Furthermore, you may comprise a friction reduction structure by forming at least one of the inner peripheral surface of the outer side elastic tube 11a, and the outer peripheral surface of the inner side elastic tube 11b in the frosted glass-like uneven surface which has a fine unevenness | corrugation. This uneven surface can be formed, for example, by rapidly cooling the outer elastic tube 11a and the inner elastic tube 11b during molding. In addition, as for an uneven surface, it is preferable that arithmetic surface roughness Ra is 10 micrometers-60 micrometers.

  The resin absorbent material 12 is used for lining the inner peripheral surface of the miscellaneous drainage pipe 21 as the impregnated adhesive resin is cured. The resin absorbent material 12 is made of a woven fabric or a non-woven fabric, and more specifically, a polyester fiber knitted fabric (polyester fiber tube) can be used. Since this polyester fiber cylinder has a good impregnation property with an adhesive resin and is highly stretchable in the circumferential direction, it can be suitably used for the lining method according to this embodiment involving reverse insertion.

  Next, a lining method using the lining material 10 will be described. FIG. 2 is an example of a drainage system for miscellaneous drainage in a multi-storey apartment house to be refurbished. The miscellaneous drainage pipe 21 piped through the slabs of each floor and various sanitary appliances installed in each dwelling unit Connected to the drainage horizontal pipe 22 for leading miscellaneous drainage from the kitchen sink, bathroom, basin, washing machine, etc. to the drainage vertical pipe 21 and the lower end of the drainage vertical pipe 21, And a miscellaneous drainage horizontal main pipe 23 for removing the miscellaneous drainage to the outdoor drainage basin 24. Further, the drainage vertical pipe 25 is installed at the upper end of the miscellaneous drainage pipe 21 and is provided with a vent cap 26 at the upper end passing through the roof slab, and the miscellaneous drainage pipe 21, with one end at the miscellaneous drainage pipe. 21 is provided with a vent stand 27 which is taken out from the base 21 and opened at the other end to the atmosphere via the extended vent pipe 25. The miscellaneous drainage vertical pipes 21 connected to each other in the vertical direction, and the miscellaneous drainage vertical pipe 21 and the miscellaneous drainage horizontal branch pipe 22 are connected to each other via a vertical pipe joint 28 (TY joint). The miscellaneous drainage vertical pipe 21 and the miscellaneous drainage horizontal main pipe 23 are connected via a bent pipe joint 29 (elbow joint).

  In the lining method of the present embodiment, first, as a preparatory work, the miscellaneous drainage pipe 21 is cut at the uppermost floor (near the extended vent pipe 25) and under the lowermost slab (near the miscellaneous drainage horizontal main pipe 23). Or remove it from the joint. This pipe end part becomes the insertion start point (insertion end part 31) and the insertion end part (terminal part 32) of the lining material 10. In the case of a high-rise apartment house, the miscellaneous drainage pipe 21 is cut even on the middle floor as necessary so that the length of the pipe can be constructed. Subsequently, an interior material (a part of the floor, wall, or ceiling material) adjacent to the connection portion between the drainage vertical pipe 21 and the drainage horizontal branch pipe 22 is incised to expose the drainage horizontal branch pipe 22 and Prepare for cutting. In addition, the water in the miscellaneous drainage pipe 21 is scattered and removed by the compressed air of the air compressor, and warm air is introduced into the miscellaneous drainage pipe 21 to be sufficiently dried.

  Next, in order to remove deposits and rust adhering to the inner peripheral surface of the miscellaneous drainage pipe 21, the inside of the miscellaneous drainage pipe 21 is cleaned and polished using a high-pressure washer. Then, the connection part (the downstream end of the misdrain drainage side branch pipe 22) of the misdrain drainage pipe 21 and the misdrain drainage side branch pipe 22 is cut | disconnected. Then, warm air is sent from the side branch pipe cutting portion 33 and the end portion 32 of the miscellaneous drainage pipe 21 of each floor into the miscellaneous drainage pipe 21 by a warm air blower 34 (futon dryer). Dry.

  Next, in order to impregnate the lining material 10 with the adhesive resin, first, the lining material 10 is extended on the work mat. The lining material 10 has a flat cross-sectional shape (see FIG. 1A) and is placed on the work mat. The length of the lining material 10 to be used is the sum of the length of the miscellaneous drainage vertical pipe 21 plus the length of the inlet guide hose 46 described later, the length of the reversing port 44 and the extra length. Subsequently, an adhesive resin main component (for example, epoxy resin) and a curing agent (for example, amine-based) that have been preliminarily kept at a temperature of about 25 ° C. to lower the viscosity are mixed and sufficiently stirred. After stirring, an adhesive resin is injected into the resin absorbent material 12 from one end of the lining material 10. Sequentially squeeze with a roller from the resin injection end to the other end to uniformly impregnate the entire upper half of the resin absorbent material 12 with the adhesive resin (at the same time, air bubbles are removed). At this time, it is confirmed that the resin absorbent material 12 which is white is dyed in the color of the adhesive resin (for example, blue).

  When the surplus portion is sufficiently squeezed, the top and bottom of the resin absorbent material 12 are turned back to the resin injection end, and the remaining half is squeezed again with a roller. Also at this time, it is confirmed that the resin absorbent material 12 that was white is dyed in the color of the adhesive resin. After the impregnation step, the reversal speed adjustment rope 35 (string-like body) is firmly tied to the resin injection end of the lining material 10 (see FIG. 4A). The reverse speed adjusting rope 35 is made of a soft rope (for example, made of polypropylene) coated with silicone oil.

  Next, the lining material 10 is folded in the length direction, and is cooled by being immersed in cooling water (preferably ice water) of 10 ° C. or lower for a predetermined time. Thereby, the progress (rise) of the curing reaction of the adhesive resin can be delayed. For this reason, even when an adhesive resin having a relatively short curing time is used, the coating process can be appropriately performed without proceeding before the coating process to be described later. Resin can be used, and the entire construction time (water stoppage time) can be shortened.

  While removing the cooling-cured lining material 10 from the cooling water, the surface moisture is wiped off with a cloth. At this time, it is confirmed that the double tube 11 is not damaged. That is, as shown in FIG. 3, when the pinhole 36 is vacant in the outer elastic tube 11a, the cooling water enters from the pinhole 36 when immersed in the cooling water, and the lining material 10 is removed from the cooling water. Even after the removal, since the intruding cooling water (intrusion water 37) remains between the outer elastic tube 11a and the inner elastic tube 11b, the presence or absence of the intrusion water 37 is visually recognized through the transparent outer elastic tube 11a. Thereby, it can be confirmed reliably whether the pinhole 36 is vacant in the outer side elastic tube 11a. If the pinhole 36 is vacant in the outer elastic tube 11a, air may enter from the pinhole 36 in the covering step and cause the outer elastic tube 11a to burst. It is important to keep

  Further, if the pinhole 36 is vacant in the inner elastic tube 11b, the adhesive resin penetrates between the inner peripheral elastic tube and the outer elastic tube 11a from the pinhole 36 in the impregnation step. The presence / absence of (intrusion resin 38) can be visually recognized through the transparent outer elastic tube 11a, whereby it can be confirmed whether or not the pinhole 36 is vacant in the outermost elastic tube. Even when the pinhole 36 is vacant in the inner elastic tube 11b, the pinhole 36 may cause the burst of the outer elastic tube 11a and the floating (peeling) of the resin absorbent material 12 from the inner peripheral surface of the miscellaneous drainage pipe 21. It is important to confirm the presence or absence of this in advance.

  After confirming that the double tube 11 is not damaged, the lining material 10 is loaded into the reversing machine 40 as shown in FIG. The reversing machine 40 includes a sealed casing 41, a winding drum 42 that winds the lining material 10, a drum handle 43 that controls the rotation of the winding drum 42, and a reversal in which the insertion tip of the lining material 10 is fixed. A port 44, a connection port 45 connected to an air compressor (not shown), and a pressure gauge (not shown) for measuring internal pressure are provided. First, the other end of the reversing speed adjusting rope 35 having one end tied to the lining material 10 is tied to the winding drum 42 through the reversing port 44, and the drum handle 43 is turned to wind the lining material 10 around the winding drum 42. Subsequently, the insertion tip portion of the lining material 10 drawn out from the winding drum 42 is inserted into the reversing port 44 and fixed so as not to cause air leakage by flange joining.

  After the lining material 10 is inserted into the reversing machine 40, the reversing port 44 and the insertion end 31 of the miscellaneous drainage pipe 21 are communicated with each other by an inlet guide hose 46 (flexible hose). In addition, an outlet guide hose 47 is connected to the end portion 32 of the miscellaneous drainage pipe 21.

  Then, the reversing machine 40 is connected to an air compressor, the internal pressure is increased to a predetermined pressure, and the lining material 10 is reversely inserted into the miscellaneous drainage pipe 21 via the inlet guide hose 46. At this time, by operating the drum handle 43 and controlling the reverse insertion speed (feeding speed of the lining material 10) to a predetermined range, the outer elastic tube 11a and the inner elastic tube 11b are appropriately expanded while the lining material 10 is being expanded. Can be inverted. The reversely inserted lining material 10 is in the order of the resin absorbent material 12, the inner elastic tube 11b, and the outer elastic tube 11a from the outside. The resin absorbent material 12 is formed by the outer elastic tube 11a and the inner elastic tube 11b that are expanded by air pressure. The inner peripheral surface of the miscellaneous drainage pipe 21 is directly covered so as to be pressed against the inner peripheral surface of the miscellaneous drainage pipe 21 (see FIG. 4B).

  Here, as described above, the lining material 10 has a friction reducing structure at the contact surface between the outer elastic tube 11a and the inner elastic tube 11b by the lubricant 13 (see FIG. 1E). When the lining material 10 is inverted and inserted pneumatically from the insertion end 31 of the miscellaneous drainage vertical pipe 21 and the outer elastic tube 11a and the inner elastic tube 11b are expanded, the outer elastic tube 11a and the inner elastic tube 11b are pulled together during expansion. Without matching, they expand while slightly shifting in the circumferential direction. That is, the outer elastic tube 11a and the inner elastic tube 11b can take an expansion form equivalent to the expansion in a free state. For this reason, as shown in FIG. 5 (a), even when the streaks 49 are generated in the outer elastic tube 11a and the inner elastic tube 11b, the narrow streaks 49 are only generated in the circumferential direction. The outer elastic tube 11a and the inner elastic tube 11b do not expand unevenly as a whole. Therefore, it is possible to effectively prevent bursts of the outer elastic tube 11a and the inner elastic tube 11b that are expanded during reverse insertion into the tube.

  FIG. 5B relates to the prior art, and is a lining material without the lubricant 13 on the contact surface between the outer elastic tube 11a and the inner elastic tube 11b. In this case, wide streaks 49 are generated in the outer elastic tube 11a and the inner elastic tube 11b, and the outer elastic tube 11a and the inner elastic tube 11b expand as a whole and cause a burst.

  When the reverse insertion of the lining material 10 proceeds more than half, the reverse insertion end (winding start end) of the lining material 10 is fed out from the winding drum 42, and the reverse speed adjusting rope 35 is fed out. The reversal speed adjustment rope 35 having one end fixed to the drum 42 is stretched (tensioned) and sent toward the end of the miscellaneous drainage pipe 21, and the reversal insertion speed of the lining material 10 is adjusted. (See FIG. 4A). At this time, since the reversal speed adjusting rope 35 passes through the inside of the lining material 10 (outer elastic tube 11a) that is reversely coated on the inner peripheral surface of the miscellaneous drainage pipe 21, there is a curved portion particularly in the piping path. In some cases, since the outer elastic tube 11a is positioned on the feed path of the reversal speed adjustment rope 35 on the inner peripheral surface inside the curve, the tensioned reversal speed adjustment rope 35 is fed while rubbing the outer elastic tube 11a. However, as described above, since the reversal speed adjusting rope 35 is coated with silicone oil, the reversing speed adjusting rope 35 does not rub the outer elastic tube 11a strongly at the contact portion (friction). Can be prevented from being drilled due to wear of the outer elastic tube 11a.

  When the reverse insertion of the lining material 10 to the end portion 32 of the miscellaneous drainage pipe 21 is completed, the outlet guide hose 47 is closed with a closing plug 48. Then, the internal pressure of the reversing machine 40 is maintained at a predetermined pressure (lower pressure than during reverse insertion) until the adhesive resin has a predetermined hardness. In addition, in order to accelerate | stimulate hardening of the resin for adhesion | attachment, it is preferable to heat the inside of the miscellaneous drainage vertical pipe 21 using the hot air blower 34 of each place mentioned above. When the adhesive resin is cured to a predetermined hardness, the internal pressure of the reversing machine 40 is gradually decreased, and then the insertion end portion 31 and the end portion 32 of the miscellaneous drainage pipe 21 are cut off.

  FIG. 6 is a view showing an operation of extracting the double tube 11 from the inside of the miscellaneous drainage pipe 21 after curing curing (in FIG. 6, the inside of the miscellaneous drainage pipe 21 is shown larger than the others). . First, after hardening and curing, in order to confirm whether or not the inner peripheral surface of the miscellaneous drainage pipe 21 is properly covered with the inner peripheral surface of the pipe, the insertion end of the miscellaneous drainage pipe 21 is checked. An operator A near 31 has a resin-absorbing material 12 and a double tube 11 (inner elastic tube) with a cable-shaped endoscope 51 directed from the upper end to the lower end of the lining material 10 covered with the miscellaneous drainage pipe 21. 11b) (see FIG. 6A). Since the endoscope 51 has an appropriate rigidity, it can be easily fed downward. At this time, the resin absorbent material 12 and the inner elastic tube 11b are partially adhered at a portion where the temperature is lower than the others during curing and the adhesive resin is not cured to a predetermined hardness (up to a predetermined hardness). If cured, the resin absorbent 12 and the inner elastic tube 11b will not stick to each other due to the material). One end of a tension string 52 is connected to the endoscope 51, and the operator A feeds the endoscope 51 downward while grasping the other end of the tension string 52, whereby the tension string 52. Can be inserted into the gap between the resin absorbent material 12 and the double tube 11 from the upper end to the lower end of the lining material 10.

  When the tension string 52 is inserted to the lower end of the lining material 10, the operator B near the terminal end 32 of the miscellaneous drainage pipe 21 removes the tension string 52 from the endoscope 51 and attaches one end of the tension string 52 to the ring member. The lower end portion of the double tube 11 is inserted into the ring member 53 (see FIG. 6B). The outer diameter of the ring member 53 substantially matches the inner diameter of the resin absorbent material 12 bonded to the lining material 10. The operator 51 pulls up the endoscope 51 from which the tension string 52 has been removed.

  Then, in a state where the operator B holds the lower end portion of the double tube 11, the operator A moves the ring member 53 between the resin absorbent material 12 and the double tube 11 from the lower end of the lining material 10 toward the upper end. The tension string 52 is pulled upward so as to pass between them (see FIG. 6C). By doing in this way, the double member 11 can be peeled off from the resin absorbent material 12 by the ring member 53 so as to spread the resin absorbent member 12 outward and the double tube 11 inward. . For this reason, compared with the case where one end of the double tube 11 is gripped and peeled while being reversed, the resin absorbent material 12 is not applied with an inward pulling force, and the inner periphery of the miscellaneous drainage pipe 21 of the resin absorbent material 12. Floating (peeling) from the surface can be prevented. After pulling out the tension string 52, the worker B pulls out the peeled double tube 11 from the miscellaneous drainage pipe 21 (see FIG. 6D).

  After the double tube 11 is pulled out, an opening is formed in the resin absorbent material 12 at the connecting portion (vertical joint 28) between the miscellaneous drainage vertical pipe 21 and the random drainage horizontal branch pipe 22, and the inside of the vertical pipe joint 28 is bonded to the adhesive resin. After the coating, the repaired portion of each pipe is restored, such as by connecting the updated drainage horizontal branch pipe 22, and the repair work is completed after performing various inspections such as a water flow inspection.

  As described above, according to the lining method of the present embodiment, the lining material 10 that can effectively prevent bursting of the outer elastic tube 11a and the inner elastic tube 11b that expands during reverse insertion into the pipe is used. Therefore, construction can be performed without work trouble. In this embodiment, the drainage pipe 21 is taken as an example of the repair, but is not limited to this, and other drainage pipes such as a drainage horizontal main pipe and a drainage horizontal branch pipe, as well as a sewage pipe. The lining method can also be applied to equipment piping such as gas pipes and water supply pipes. In addition, the lining method may be applied not only to rehabilitation of existing pipes but also to new pipes (including renewal). In this case, the new pipes can be lined later, which increases the durability of the new pipes. Can be increased.

  Furthermore, in the present embodiment, a method of checking the presence or absence of the pinhole 36 in the outer elastic tube 11a or the inner elastic tube 11b by immersing in cooling water, a method of applying silicone oil to the reversing speed adjusting rope 35, Regarding the method of peeling the double tube 11 using the tension string 52 and the ring member 53, not only the lining material 10 having a friction reducing structure at the contact surface between the outer elastic tube 11a and the inner elastic tube 11b, but also the conventional method. The present invention is also applicable when a lining material made of double or more elastic tubes is used.

  DESCRIPTION OF SYMBOLS 10: Lining material 11: Double tube 11a: Outer elastic tube 11b: Inner elastic tube 12: Resin absorber 13: Lubricant 21: Miscellaneous drainage pipe 35: Inversion speed adjustment rope 51: Endoscope 52: Tensile string 53: Ring member

Claims (7)

A plurality of elastic tubes each formed in a cylindrical shape, a multiplex tube configured in a multiplex tube shape, and a cylindrical resin absorbent material provided inside the multiplex tube and impregnated with an adhesive resin; A lining material that is reversely inserted by fluid pressure so that the resin absorbent material impregnated with the adhesive resin is on the outside and the multiple tube is on the inside from one end of the tube, and covers the inner peripheral surface of the tube There,
The lining material is characterized in that at least one of the contact surfaces of the elastic tubes which are in contact with each other inside and outside of the multiple tube is formed on a frosted glass-like uneven surface having fine unevenness . A plurality of elastic tubes each formed in a cylindrical shape, a multiplex tube configured in a multiplex tube shape, and a cylindrical resin absorbent material provided inside the multiplex tube and impregnated with an adhesive resin; A lining material is inserted from one end of the pipe so that the resin absorbent material impregnated with the adhesive resin is on the outside and the multiple tube is on the inside by fluid pressure so as to cover the inner peripheral surface of the pipe. The lining method used,
An impregnation step of impregnating the resin absorbent with the adhesive resin;
From one end of the tube, the resin absorbent material impregnated with the adhesive resin is placed outside and the multiple tube is placed inside by inversion with a fluid pressure, and the inner peripheral surface of the tube with the lining material A coating process for coating
After the adhesive resin of the lining material coated on the inner peripheral surface of the tube is cured, an insertion for inserting a tensile string through the gap between the resin absorbent material and the multiple tube from end to end of the lining material Process,
The tensile string is connected to the lining material so that a ring member connected to one end of the inserted tensile string passes between the resin absorbent material and the multiple tube from one end to the other end of the lining material. Withdrawing process from
After the drawing step, a drawing step for drawing out the multiple tube from the inside of the tube;
A lining method characterized by comprising The insertion step is performed by inserting a cable-like endoscope connected with one end of the tension string through the gap between the resin absorbent material and the multiple tube from end to end of the lining material. The lining method according to claim 2 , wherein A plurality of elastic tubes each formed in a cylindrical shape, a multiplex tube configured in a multiplex tube shape, and a cylindrical resin absorbent material provided inside the multiplex tube and impregnated with an adhesive resin; The elastic tube on the outermost peripheral side is made of a transparent material. From one end of the tube, the resin absorbent material impregnated with the adhesive resin is on the outside, and the multiple tube is on the inside. It is a lining method using a lining material that is reversely inserted by pressure and covers the inner peripheral surface of the pipe ,
An impregnation step of impregnating the resin absorbent with the adhesive resin;
From one end of the tube, the resin absorbent material impregnated with the adhesive resin is placed outside and the multiple tube is placed inside by inversion with a fluid pressure, and the inner peripheral surface of the tube with the lining material A coating process for coating
Prior to the coating step, the lining material is immersed in a liquid, and the lining material taken out of the liquid is visually observed to inspect whether the outermost elastic tube has a pinhole. When,
A lining method characterized by comprising The inspection step is performed after the impregnation step,
The lining method according to claim 4 , wherein the temperature of the liquid is 10 ° C. or less. The covering step is performed while adjusting the reverse insertion speed of the lining material by feeding out a string-like body whose one end is connected to the reverse insertion terminal portion of the lining material at a predetermined speed,
The lining method according to any one of claims 2 to 5 , wherein a lubricant is applied to the string-like body. The lining method according to claim 6 , wherein the lubricant is made of silicone oil.

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