JP4850603B2 - Pipeline lining method - Google Patents

Description

  The present invention relates to a pipeline lining method, and more particularly, to a pipeline lining method for lining a pipeline to repair an aged pipeline.

  When pipes such as sewer pipes buried in the ground have deteriorated, tubular pipe lining materials impregnated with thermosetting resin are inserted into the pipes to repair them without digging them. The pipe lining method is a method of heating the pipe lining material in a state in which it is expanded by air pressure or the like and pressed against the pipe inner peripheral surface to cure the thermosetting resin impregnated in the pipe lining material, thereby lining the pipe line. Already proposed and implemented. As a method for heating and curing the pipe lining material, a method using steam (water vapor) or a method using showering of hot water is employed. In addition, a method for heating and spraying hot water or filling hot water has been proposed.

  The method of hardening by this warm water showering is known from the following Patent Document 1 and the like, and a hot water hose in which a large number of spouts for ejecting hot water are formed at predetermined intervals in the length direction is inserted into a pipe line together with a pipe lining material. Then, inflating the pipe lining material with air pressure and pressing it against the inner peripheral surface of the pipe, hot water is pressurized and supplied to the hot water hose, and hot water is spouted from each outlet of the hot water hose as a hot water shower. The pipe lining material is heated and cured by spraying on the inner peripheral surface of the pipe lining material.

Also, after the pipe lining material has hardened, the temperature of the pipe lining material is still high, so prepare cold water (room temperature) with a water truck separately and spray cold water on the pipe lining material to cool the high temperature pipe lining material. I was going.
Japanese Patent No. 2501048

  However, conventionally, in order to cool the pipe lining material after curing, a water supply vehicle that supplies cold water is required in addition to a device that supplies hot water used for heat curing. There was a problem that a car parking space had to be prepared.

  In addition, as a conventional lining material curing method, a method of filling hot water requires a large amount of water, and a method of spraying hot water in a spot manner makes it difficult to uniformly control the temperature of the entire lining material. It has been difficult to obtain stable quality, such as the occurrence of uneven curing due to high temperatures first.

  Moreover, steam is mainly used for spraying, and in the case of hot water, there is a large variation depending on the pressure and the size of the hole, and it is difficult to spray uniformly.

  Accordingly, the present invention has been made to solve such problems, and it is possible to heat and cure the tube lining material uniformly and inexpensively and to cool the tube lining material after thermosetting. It is an object of the present invention to provide a pipe lining method that can be used.

In order to solve the above problems, the present invention
A pipe lining method in which a tubular pipe lining material impregnated with a thermosetting resin is inserted into a pipe line to cure the thermosetting resin and line the pipe line,
Inflate the pipe lining material inserted into the pipe line and press it against the pipe inner peripheral surface of the pipe line,
Hot water or steam is jetted onto the pipe lining material pressed against the pipe inner peripheral surface of the pipe to cure the thermosetting resin impregnated in the pipe lining material,
Pumped hot water stored at the bottom of the pipe lining material or hot water consisting of jetted steam is pumped out and cooled to form cooling water,
The cooling water is jetted onto the hardened pipe lining material to cool the pipe lining material.

  In the present invention, the cured pipe lining material is cooled by using the cooling water obtained by pumping out the hot water or steam used for curing the thermosetting resin to the outside, and cooling it. A cooling water supply vehicle is not required, the road area occupied by the construction site is reduced, and the amount of water used in the construction can be saved. Further, since the high-temperature pipe lining material is cooled after the pipe lining material is cured, the characteristics of the cured pipe lining material can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view for explaining a pipe lining method. Reference numeral 1 denotes an old pipeline such as a sewer pipe buried in the ground. When repairing this pipeline, first, a flexible tubular pipe lining is inserted into the pipeline 1 from the manhole 2 communicating with the pipeline 1. The material 3 is inserted, and a pressure medium such as compressed air is applied to the pressure vessel 4 through the pipe 6 from the air compressor 5, so that the pipe lining material 3 is inverted and inserted into the pipe line 1 with its front and back reversed. .

  The pipe lining material 3 is made of a non-woven fabric made of fibers of polyester, vinylon, acrylic, etc., and is sewed into a tubular shape, and one surface thereof (the surface that becomes the outer surface before reverse insertion into the conduit 1) is covered with a highly airtight film. A flexible tubular resin absorber is impregnated with a thermosetting resin such as an unsaturated polyester resin, vinyl ester resin, or epoxy resin. The front end portion of the pipe lining material 3 is closed and the rear end portion is opened, and the rear end portion is airtightly coupled to an opening formed on one side of the lower end portion of the pressure vessel 4 installed in the manhole 2. The

  The water supplied from the water tank 9 is softened by the water softener 10 and then supplied to the steam tank 13. The steam tank 13 is heated by a heater (not shown), and water inside the water becomes boiling water 18 to generate steam 20. A steam pump 15 is connected to the upper part of the steam tank 13 through a pipe 14, and steam is supplied into the steam hose 16 through the steam pump 15. The steam hose 16 has a distal end portion coupled to the distal end portion of the pipe lining material 3 by a rope 17 and is inserted into the pipe line 1 as the pipe lining material 3 is inverted and inserted.

  Although not shown in FIG. 1, the tip of the cooling medium hose 30 shown in FIGS. 2 and 3 is coupled to the tip of the lining material 3 by the rope 17 in the same manner as the steam hose 16. As the pipe lining material 3 is inverted and inserted, the hose 30 is inserted into the pipe line 1 together with the steam hose 16 and, as shown in FIGS. A hose 30 is arranged.

  As shown in FIG. 2, cooling water (room temperature water) is supplied to the cooling medium hose 30 from a water tank 40 cooled by a cooling device 43 via a pump 41. As will be described later, the hot water 18 staying in the lower portion of the pipe lining material 3 and pumped out by the pump 42 is supplied to the water tank 40.

  Note that the insertion portion of the pressure vessel 4 through which the steam hose 16 and the cooling medium hose 30 are inserted has airtightness secured by a packing (not shown).

As shown in FIG. 3, the steam hose 16 is provided with a plurality of sprayers 19 as spraying means at predetermined intervals in the length direction of the hose. As shown in FIGS. 4A and 4B, the sprayer 19 has two nozzles 19a, and the steam sprayed from the nozzle holes 19c of each nozzle is diffused by the diffusion member 19b to form a steam mist 20a. Erupted. In the present invention, a mixture of steam and a large number of minute hot water droplets (mist) in the form of a mist obtained by condensing steam is referred to as steam mist.

  The cooling medium hose 30 is also provided with a sprayer 31 having the same configuration as the sprayer 19, and the cooling water is ejected from the cooling medium hose 30 through the sprayer 31 in a mist state. A plurality of sprayers 31 of the cooling medium hose 30 are arranged at the same position as the sprayer 19 in the length direction of the hose and at the same interval as the arrangement interval of the sprayers 19.

  Note that the diffusing member 19b of each sprayer 19, 31 may be omitted, and each sprayer 19, 31 may be provided on the lower side as indicated by a broken line in FIG. It may also be provided on the left and right sides.

  When the inverted and inserted tube lining material 3 is heat-cured, air pressure is applied through the air compressor 5 to expand the tube lining material 3 and press the tube lining material 3 against the pipe inner peripheral surface. In this state, the steam tank 13 is heated to generate the steam 20, and the steam pump 15 is driven to pressurize and supply the steam 20 to the steam hose 16. As shown in FIG. 2, the steam 20 is uniformly diffused in all directions around the vertical direction y <b> 1, and is ejected as steam mist 20 a from each sprayer 19 and blown to the inner peripheral surface of the pipe lining material 3. The pipe lining material 3 is heated.

  At this time, the steam mist is hot, and if it is directly sprayed onto the pipe lining material, the characteristics may deteriorate depending on the type of the pipe lining material. Reduce the temperature when spraying on the material.

  In order to effectively cool the vapor mist, cooling water is ejected from the sprayers 31 provided in the cooling medium hose 30 toward the pipe lining material 3. The injection direction y2 is inclined at an angle α with the direction y1 (vertical direction) in which the steam mist is ejected from the steam hose 16 toward the tube lining material 3, and the lines y1 and y2 substantially intersect at the inner surface of the tube lining material 3. Is set as follows. Thus, by inclining the jetting direction y2 of the cooling water from the sprayer 31 with the jetting direction y1 of the steam mist from the sprayer 19 of the steam hose 16, the steam mist is made uniform by the cooling water sprayed from the sprayer 31. Can be cooled to.

  The cooling water supplied from the cooling medium hose 30 is steam mist or cooling water for cooling the hardened pipe lining material, as will be described later. For example, the cooling water is about the outside air temperature (about 20 ° C.) or It is intended for water at room temperature below that.

  Thus, the pipe lining material 3 heated by the cooled steam mist is lined by the thermosetting resin impregnated therein being cured.

  When the hardening of the pipe lining material 3 is completed, the heating of the steam tank 13 and the driving of the pump 15 are stopped, the pumps 41 and 42 are kept driven, and the hot water 18 staying at the bottom of the pipe lining material 3 is stored in the water tank 40. Circulate through. The water tank 40 is cooled by the cooling device 43, and the hot water 18 having a temperature of about 70 ° C. to 80 ° C. becomes a normal temperature cooling water of 20 ° C. or less, and passes through the sprayer 31 of the cooling medium hose 30 to the cured pipe lining material 3. It is ejected in the mist state. Thereby, the pipe lining material 3 is cooled effectively, and the strength of the pipe lining material 3 can be improved.

  Conventionally, in order to cool the pipe lining material after curing, a water supply vehicle dedicated to cooling was necessary. However, in the present invention, since the equipment for cooling the steam mist can be used as it is, it is dedicated to cooling. Water trucks are no longer required, the road area occupied by the construction site is reduced, and the amount of water used in the construction can be saved.

  In the above-described embodiment, the hot water 18 staying at the bottom of the pipe lining material 3 may be returned to the steam tank 13 via a pump (not shown), and the hot water for steam may be circulated.

  In the first embodiment, the steam mist injected from the steam hose 16 is positively cooled. However, depending on the characteristics of the pipe lining material, it may not always be necessary to cool. When such a pipe lining material is used, one hose is used as a steam / cooling medium hose, and when the pipe lining material is cured, the vapor mist is passed through this hose and the cured pipe lining material is used. When cooling the cooling water, the cooling water may be ejected through the hose.

  This embodiment is illustrated in FIG. In this embodiment, a steam / cooling medium hose 50 is provided instead of the steam hose 16. The structure of this hose is the same structure as the steam hose 16, and the hose 50 is provided with a plurality of sprayers similar to the sprayer 19.

  When the pipe lining material 3 is to be cured, the switching valve 51 is switched to the steam side, the steam from the steam tank 13 is supplied to the hose 50, and the steam is ejected from the sprayer provided in the hose 50 as steam mist. 5 is cured by heating. In addition, after the pipe lining material 3 is cured, the switching valve 51 is switched to the cooling water side, the cooling water is supplied to the hose 50, and the cooling water is ejected in a mist state from the sprayer provided on the hose 50. The subsequent pipe lining material is cooled.

  In the second embodiment, the same effect as that of the first embodiment can be obtained.

  The tube lining material 3 can be cured not by steam but also by hot water. For example, as shown in FIG. 6, the water tank 40 is heated by a boiler 62, and hot hot water is supplied to the hot water / cooling medium hose 60 via the hot water pump 61. The hot water / cooling medium hose 60 has the same structure as the steam hose 16, the steam / cooling medium hose 50, etc., and hot water is jetted from the sprayer of the hot water / cooling medium hose 60 to the pipe lining material 3 as hot water mist, The tube lining material 3 is heated and cured.

  After the pipe lining material 3 is cured, the operation of the boiler 62 is stopped and the cooling device 43 is driven to cool the hot water 18 supplied from the pump 42. Then, the hot water that has become the cooling water is supplied to the hose 60 via the hot water pump 61, and the cooling water is ejected from the sprayer of the hose 60 as a mist state to cool the cured pipe lining material 3. In the third embodiment, the same effects as in the first and second embodiments can be obtained.

  FIGS. 7 and 8 show another embodiment of a sprayer 70 (spray system) that can uniformly spray hot water and uniformly heat and cure the entire pipe lining material. As shown in FIG. 7A, the sprayer 70 includes a nozzle body 71 and a fitting body 72 that is press-fitted to the nozzle body 71. The nozzle body 71 has a conical nozzle port 71a, a columnar portion 71b communicating with the conical nozzle port 71b, curved portions 71d and 71e extending on both sides, and a fitting portion 71c formed below the nozzle port 71a. A cylindrical fitting body 72 as shown in FIGS. 7B to 7D is press-fitted and fitted into the fitting portion 71c. In the fitting body 72, vertical grooves 72a and 72b extending in the vertical direction are formed at positions opposed to the radial direction, and these vertical grooves 72a and 72b are below the center portion of the nozzle body 71 via the horizontal grooves 72c and 72d. It communicates with a cylindrical groove 72e located on the opposite side. The bending portions 71d and 71e of the nozzle body 71 are press-fitted and fitted with fitting members 73 and 74 having spring properties, and the tips 73a and 74a are bent downward.

  Thus, the sprayer 70 in which the fitting body 72 is press-fitted to the nozzle body 71 can be used as the sprayer 19 (31) of the first, second, and third embodiments. FIG. 7A shows a state where the sprayer 70 is attached to the hot water / cooling medium hose 60 of the third embodiment, and the sprayer 70 passes through the opening 60 a of the hot water / cooling medium hose 60 through the nozzle body 71. The hot water / cooling medium hose 60 is attached to the hot water / cooling medium hose 60 by firmly holding the hot water / cooling medium hose 60 between the tips 73a, 74a of the metal fittings 73, 74 and the curved portions 71d, 71e via the ring-shaped metal fitting 75. FIG. 8 shows a top view of the sprayer 70 attached to the hot water / cooling medium hose 60.

  The nozzle body 71 and the fitting body 72 of the sprayer 70 are all made of resin, metal, ceramic, wood, or the like. In the illustrated embodiment, only two vertical grooves are provided, but more vertical grooves may be formed around the fitting body.

  With such a configuration, the spray state of the sprayer 70 will be described based on the embodiment of FIG. 6. The water tank 40 is heated by the boiler 62, and hot hot water is supplied to the hot water / cooling medium hose 60 via the hot water pump 61. Supply. As shown by the alternate long and short dash line in FIGS. 7A and 7B, the warm water vertically rises in the vertical grooves 72a and 72b of the fitting body 72 of the sprayer 70, passes through the horizontal grooves 72c and 72d, and the cylindrical groove 72e. And then sprayed upward via the nozzle opening 71a of the nozzle body 71. This spraying state is shown in FIG. 9, and the hot water is sprayed uniformly from the hot water / cooling medium hose 60 in all directions, so that the entire pipe lining material 3 is heated uniformly and the pipe lining material 3 is impregnated with thermosetting. Is cured.

  After the pipe lining material 3 is cured, the operation of the boiler 62 is stopped and the cooling device 43 is driven to cool the hot water 18 supplied from the pump 42. Then, the hot water that has become the cooling water is supplied to the hose 60 via the hot water pump 61, and the cooling water is sprayed from the sprayer 70. As with the hot water, the cooling water is sprayed evenly in all directions, whereby the entire pipe lining material 3 is uniformly cooled to room temperature.

  In such a configuration, in any of Examples 1 to 3, the tube lining material is uniformly heated and cured by the hot water sprayed evenly in a wider range, thereby causing no curing unevenness and stable. Quality can be ensured. Furthermore, the curing time can be shortened and the amount of water used can be saved by about half or less.

  In addition, the high-temperature pipe lining material is not rapidly cooled after thermosetting, but by cooling in stages, there is no risk of strength reduction, and stable quality can be ensured.

  Furthermore, by eliminating the need for cooling water trucks that were required in the past, it is possible to save the amount of water used in the construction, and by eliminating the need for cooling water trucks that were previously required, The amount of setup is eliminated and construction time can be shortened. In addition, since a cooling water supply vehicle (water supply tank) is not necessary, the road occupation area of the construction site is reduced, and traffic congestion and the like can be avoided.

It is sectional drawing for demonstrating the pipeline lining construction method of this invention. It is sectional drawing along the arrow AA in FIG. It is an enlarged top view of a steam hose and a cooling medium hose. (A) is a top view which shows the structure of a sprayer, (b) is sectional drawing along the BB line in (a). It is sectional drawing corresponding to FIG. 2 which shows the other Example of this invention. It is sectional drawing corresponding to FIG. 2 which shows other Example of this invention. (A) is explanatory drawing which shows the state which attached the sprayer to the hose, (b) is a perspective view of the fitting body of a sprayer, (c) is a top view of a fitting body, (d) is a side view of a fitting body. It is a top view when a sprayer is attached to a hose. It is explanatory drawing which showed the state by which warm water is sprayed from a hose.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe line 3 Pipe lining material 13 Steam tank 15 Steam pump 18 Hot water 19 Sprayer 20 Steam 20a Steam mist 30 Cooling medium hose 31 Sprayer 40 Water tank 43 Cooling device 50 Steam and cooling medium hose 60 Hot water and cooling medium hose 70 Sprayer 71 Nozzle body 72 mating body

Claims (8)

A pipe lining method in which a tubular pipe lining material impregnated with a thermosetting resin is inserted into a pipe line to cure the thermosetting resin and line the pipe line,
Inflate the pipe lining material inserted into the pipe line and press it against the pipe inner peripheral surface of the pipe line,
Hot water or steam is jetted onto the pipe lining material pressed against the pipe inner peripheral surface of the pipe to cure the thermosetting resin impregnated in the pipe lining material,
Pumped hot water stored at the bottom of the pipe lining material or hot water consisting of jetted steam is pumped out and cooled to form cooling water,
A pipe lining method characterized by cooling the pipe lining material by spraying the cooling water onto the hardened pipe lining material.   The pipe lining method according to claim 1, wherein the warm water or steam is jetted to the pipe lining material via the first hose and the cooling water is jetted to the pipe lining material, respectively.   The hot water or steam is jetted to the pipe lining material through a hose, and after the thermosetting resin is cured, cooling water is supplied to the hose and jetted to the cured pipe lining material instead of hot water or steam. 2. The pipeline lining method according to claim 1, wherein the pipeline lining method is used.   Hot water or steam formed by heating the water in the aquarium is ejected to the pipe lining material through the hose, the hot water stored in the bottom of the pipe lining material is returned to the aquarium, and the thermosetting resin The pipe lining method according to claim 3, wherein the hot water in the water tank is cooled and supplied to the hose after curing. The pipe lining method according to claim 2, wherein the cooling water is used for cooling the hot water or steam to be ejected.   The pipeline lining method according to any one of claims 1 to 5, wherein the hot water or steam and the cooling water are ejected in a mist state.   The pipe lining method according to any one of claims 1 to 5, wherein the hot water or steam and the cooling water are ejected as a shower.   7. A sprayer having a plurality of vertical grooves formed in the periphery and having a nozzle port is provided, and the hot water, steam, or cooling water is sprayed upward from the nozzle port through the vertical groove. The pipe lining method according to any one of the above.

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