JP5054642B2 - Pipe line repair system - Google Patents

Description

  The present invention relates to a pipe line repair system that repairs a pipe line by lining a repair liner in an existing pipe line.

  Conventionally, as a pipeline repair system for lining a repair liner in an existing pipeline, a repair liner made of a tube impregnated with a thermosetting resin is placed in the existing pipeline, and then mixed steam is injected into the repair liner. The one that supplies and thermally cures the repair liner is known (see, for example, Patent Document 1).

In the conventional pipe line repair system, the mixed steam after heating the repair liner is discharged to the atmosphere.
JP-A-9-155978

  However, in the conventional pipe line repair system, since the mixed steam after heating the resin layer is discharged to the atmosphere, the waste heat energy of the discharged mixed steam is wasted. was there.

  The present invention has been made paying attention to the above problem, and an object of the present invention is to provide a pipeline repair system capable of improving energy efficiency while appropriately lining a repair liner.

In order to achieve the above object, in the present invention, a mixed steam supply means for supplying a mixed steam obtained by mixing compressed air and high-temperature steam, a plug means attached to a repair liner end, the mixed steam supply means, and the plug A pipeline repair system for lining the repair liner in an existing pipeline with mixed steam, comprising a mixed steam supply passage connecting the means;
The mixed steam supply means has a boiler that generates high-temperature steam by heating water in a water supply tank,
The plug means is connected to a mixed steam discharge passage provided with a pressure adjusting means in the middle position,
The mixed steam discharge passage has a primary side pipe located upstream of the pressure adjusting means and a secondary side pipe located downstream of the pressure adjusting means and provided with a heat recovery means at the downstream end. The pressure adjusting means adjusts the pressure of the mixed steam in the primary side pipe to a required value for lining the repair liner, and the heat recovery means is configured to exhaust heat of the mixed steam in the secondary side pipe. Is collected into the water in the water supply tank.

Therefore, in the pipeline repair system of the present invention, in the pressure adjusting means, the mixed steam pressure in the primary side pipe of the mixed steam discharge path is adjusted to a required value for lining the repair liner, and in the heat recovery means The mixed steam exhaust heat in the secondary side pipe of the mixed steam discharge path is recovered into the water in the water supply tank.
That is, since the mixed steam pressure of the primary side pipe is adjusted to a state suitable for the lining of the repair liner, the repair liner can be cured while being securely pressed into the existing pipe line. In addition, since the mixed steam exhaust heat from the secondary side pipe is recovered in the water in the water supply tank, the water in the water supply tank is heated without wasting the energy of the mixed steam after being used to heat the repair liner. Can be used for that.
As a result, it is possible to improve energy efficiency while appropriately lining the repair liner.

  Hereinafter, the best mode for realizing the pipeline repair system of the present invention will be described based on Example 1 shown in the drawings.

First, the configuration will be described.
FIG. 1 is a configuration diagram illustrating the overall configuration of the pipeline repair system according to the first embodiment. FIG. 2 is a block diagram showing a detailed configuration around the boiler of the pipeline repair system shown in FIG. FIG. 3 is a block diagram showing a detailed configuration around the compressor of the pipeline repair system shown in FIG. FIG. 4 is a block diagram showing a detailed configuration around the water supply tank of the pipeline repair system shown in FIG. 2 to 4, the portions indicated by two continuous squares are detachable couplers.

  The pipeline repair system in the first embodiment is a system for repairing the pipeline 1 by lining the repair liner 2 in the existing pipeline 1 with the mixed steam.

  The mixed steam is generated by mixing high-temperature steam generated by heating the water W1 stored in the water supply tank 21 from a water source W such as a water supply by the boiler 22 and compressed air generated by pressurizing by the compressor 23. . The existing pipeline 1 is a so-called buried pipe buried underground such as a sewer pipe. The repair liner 2 is made of a flexible tube impregnated with a thermosetting resin, and is drawn into the pipe line 1 through a manhole 3 opened to the ground.

  A plug device (plug means) 10 is attached to one end 2 a of the repair liner 2. On the other hand, a mixed steam supply mechanism (mixed steam supply means) 20 for supplying mixed steam is installed on the ground near the manhole 3. The mixed steam supply mechanism 20 and the air inlet 11 of the plug device 10 are connected via a mixed steam supply path 30. Further, the plug device 10 has an exhaust port 12, and the exhaust port 12 is provided with a pressure adjusting valve (pressure adjusting unit) 50 at a midway position, and a heat recovery unit (heat recovery unit) 60 at the downstream end. Is connected to the mixed steam discharge path 40.

  The plug device 10 includes a support leg 13 provided in an upper opening of the manhole 3, a connecting jig (common plug portion) 14 supported by the support leg 13, and an insertion hose (insertion member) inserted into the repair liner 2. 15).

  Here, the connecting jig 14 has an air supply port 11 and an exhaust port 12, and is mounted so as to close one end 2 a of the repair liner 2. The insertion hose 15 is composed of a hose having one end bound together with the other end 2b of the repair liner 2 and sealed, and having an opening 15a in the vicinity of the binding end. Is inserted into the repair liner 2. As a result, the opening 15 a of the insertion hose 15 is positioned in the vicinity of the other end 2 b of the repair liner 2.

  The mixed steam supply mechanism 20 includes a boiler 22 that heats the water W1 in the water supply tank 21 to generate high-temperature steam, a compressor 23 that pressurizes the intake air to generate compressed air, and the boiler 22 and the mixed steam supply path. 30, and a high-temperature steam supply path 31 connecting the compressor 30 and a compressed air supply path 32 connecting the compressor 23 and the mixed steam supply path 30.

  Here, the boiler 22 has an economizer 22a. The economizer 22 a heats the water W <b> 1 in the water supply tank 21 with the exhaust gas from the boiler 22. The boiler 22 preheats the water W1 by the economizer 22a and then performs final heating. The boiler 22 and the water supply tank 21 are connected via a water supply pipe 24. In the middle of the water supply pipe 24, a normally open manual valve B, a feed pump 25, and a normally open manual valve B are provided in this order (see FIGS. 2 and 4).

  The high temperature steam supply path 31 is connected to the boiler 22 at the upstream end portion, and is provided with a mixed steam temperature automatic adjustment valve (high temperature steam adjustment means) 26 at an intermediate position. And between the boiler 22 and the mixed steam temperature automatic adjustment valve 26, as shown in FIG. 2, the separator 28a, the normally open manual valve B, the flexible hose F1, the normally open manual valve B, the steam pressure reduction, in order from the upstream side. A valve 28b, a first vapor pressure indicator 28c, a vapor pressure automatic adjustment valve 28d, a vapor pressure sensor 28e, a vapor flow meter 28f, a second vapor pressure indicator 28g, a normally open manual valve B, and a flexible hose F2 are provided. . Further, as shown in FIG. 3, a normally-open manual valve B and a check valve 28h are provided on the downstream side of the mixed steam temperature automatic adjustment valve 26 in order from the upstream side.

  Here, the separator 28 a is a steam separator that separates water droplets contained in the high-temperature steam generated by the boiler 22. The first vapor pressure indicator 28c is a pressure gauge that displays the pressure of the high-temperature steam decompressed by the steam decompression valve 28b. The vapor pressure automatic adjustment valve 28d is an electric automatic valve that automatically adjusts the vapor pressure in accordance with the downstream (secondary side) pressure detected by the vapor pressure sensor 28e. The second vapor pressure indicator 28g is a pressure gauge that displays the pressure of the high-temperature steam regulated by the vapor pressure automatic adjustment valve 28d. The flexible hoses F1 and F2 are attached and detached as necessary.

  The mixed steam temperature automatic adjustment valve 26 is an electric automatic valve that automatically adjusts at least one of the flow rate and pressure of the high-temperature steam according to the required temperature of the mixed steam in the mixed steam supply path 30. The required temperature of the mixed steam is a temperature required for properly lining the repair liner 2 and is arbitrarily set. The high-temperature steam is automatically adjusted based on the detection value of the mixed steam supply side temperature sensor 33 a provided in the mixed steam supply path 30.

  The compressed air supply path 32 is connected to the compressor 23 at the upstream end, and is provided with a compressed air adjusting valve (compressed air adjusting means) 27 at an intermediate position. As shown in FIG. 3, a flexible hose F3, a blow valve 29a, an air pressure reducing valve 29b, an air flow meter 29c, and an air pressure indicator 29d are arranged between the compressor 23 and the compressed air adjustment valve 27 in order from the upstream side. Is provided. A normally open manual valve B is provided downstream of the compressed air adjustment valve 27.

  Here, the blow valve 29a is a normally closed manual valve that is opened to the atmosphere at an arbitrary timing. The air pressure indicator 29d is a pressure gauge that displays the pressure of the compressed air decompressed by the air decompression valve 29b. The flexible hose F3 is attached / detached as necessary.

  The compressed air adjusting valve 27 is a manual valve that adjusts the compressed air flow rate and the compressed air pressure according to the required flow rate and required pressure of the mixed steam in the mixed steam supply path 30. The required flow rate of the mixed steam is a flow rate required for properly lining the repair liner 2, and the required pressure of the mixed steam is a pressure required for properly lining the repair liner 2, and each is arbitrarily set To do. The compressed air flow rate is manually adjusted based on the detected value of the air flow meter 29c, and the compressed air pressure is manually adjusted based on the detected value of the mixed steam discharge side pressure sensor 51 provided in the mixed steam discharge path 40. .

  The mixed steam supply path 30 is connected to a high-temperature steam supply path 31 and a compressed air supply path 32 at the upstream end, and the air supply port 11 is connected to the downstream end. In addition, as shown in FIG. 3, the mixed steam supply path 30 has a mixed steam supply side temperature sensor 33a, a safety valve 33c, a mixed steam pressure indicator 33d, a steam trap 33e, and a normally open manual valve B in order from the upstream side. Is provided.

  Here, the safety valve 33c is a normally closed automatic valve that is opened to the atmosphere at a timing when the pressure is higher than an arbitrary set pressure. The mixed vapor pressure indicator 33d is a pressure gauge that displays the pressure of the mixed vapor in the mixed vapor supply path 30. The steam trap 33 e is an automatic valve that discharges drain generated in the mixed steam supply path 30. Here, the mixed steam supply side temperature sensor 33a is located near the branch portion of the mixed steam supply path 30, the high temperature steam supply path 31, and the compressed air supply path 32, and is operated close to the mixed steam temperature automatic adjustment valve 26 and the like. It has a good arrangement. However, it may be provided in the vicinity of the plug device 10 or in the air supply port 11 of the connecting jig 14 in order to improve the lining accuracy.

  The mixed steam discharge path 40 bypasses the pressure adjustment valve 50, a primary side pipe 41 located upstream of the pressure adjustment valve 50, a secondary side pipe 42 located downstream of the pressure adjustment valve 50, and the primary side. A bypass pipe 43 that connects the pipe 41 and the secondary pipe 42 is provided.

  The primary side pipe 41 is connected to the exhaust port 12 at the upstream end, and as shown in FIG. 4, the mixed steam discharge side temperature sensor 41a, the separator 41b, the normally open manual valve B, the mixed steam discharge as shown in FIG. A side pressure sensor 51 is provided.

  Here, the separator 41b is a device that separates the mixed steam and the drain in the primary side pipe 41, and a primary side drain pipe 41d provided with a steam trap 41c is connected to an intermediate position. The primary side drain pipe 41d has an open downstream end 41e positioned above the water supply tank 21, and the drain discharged through the steam trap 41c flows into the water supply tank 21. That is, the separator 41b, the primary side drain pipe 41d, and the steam trap 41c are provided in the middle of the primary side pipe 41, and the primary side drain recovery for recovering the drain generated in the primary side pipe 41 into the water supply tank 21. Part 411.

  The downstream end of the secondary side pipe 42 is inserted into the water supply tank 21, and the downstream end 42 a located in the water supply tank 21 is branched into a plurality of paths.

  The bypass pipe 43 has an upstream end connected to the primary pipe 41 located upstream from the mixed steam discharge pressure sensor 51 and a downstream end connected to the secondary pipe 42 located downstream from the pressure adjustment valve 50. It connects and the bypass valve 43a is provided in the middle position. The bypass valve 43a is a normally closed manual valve that is opened at an arbitrary timing.

  The mixed steam discharge side pressure sensor (pressure detection means) 51 is a pressure sensor that detects the pressure of the mixed steam in the primary side pipe 41. Here, the mixed steam discharge side pressure sensor 51 is located in the vicinity of the pressure adjustment valve 50 and has a good operability. However, in order to improve the lining accuracy, it may be provided in the vicinity of the plug device 10 or in the exhaust port 12 of the connecting jig 14.

  The pressure regulating valve 50 is a required value for lining the repair liner 2 with the pressure of the mixed steam in the primary side pipe 41 according to the detection value of the mixed steam discharge side pressure sensor 51 provided in the primary side pipe 41. It is an electric automatic valve that adjusts automatically. The “required value” is a mixed steam pressure for pressing the repair liner 2 into the existing pipe line 1 and is arbitrarily set according to the material, thickness, etc. of the repair liner 2.

  The heat recovery unit 60 is disposed in the water supply tank 21 and has a plurality of exhaust heat exchange pipes 61,... Connected to each of the downstream end portions of the secondary side pipe 42 branched into a plurality of paths, and each exhaust heat. An exhaust pipe (exhaust part) 62 that is connected to the downstream end of the exchange pipe 61 and protrudes from the water supply tank 21 to open to the atmosphere, and a drain pipe 63 branched from the exhaust pipe 62 are provided.

  Here, the exhaust heat exchange pipe 61 is a pipe that exchanges heat between the mixed steam and the water W1 in the water supply tank 21 when the mixed steam flowing in from the secondary side pipe 42 passes through. Consists of tubes and the like. By providing a plurality of the exhaust heat exchange pipes 61, the heat transfer area in contact with the mixed steam is increased to increase the heat exchange rate. The exhaust pipe 62 is a pipe line that opens the downstream end of the exhaust heat exchange pipe 61 to the atmosphere, and an exhaust valve 62a that is a normally open manual valve is provided in the middle position. The drain pipe 63 has an upstream end located upstream from the exhaust valve 62 a and a downstream end opened into the water supply tank 21. Further, a steam trap 63 a is provided in the middle of the drain pipe 63. Accordingly, the drain discharged through the steam trap 63a is discharged into the water supply tank 21. That is, the drain pipe 63 and the steam trap 63 a serve as a secondary-side drain collection unit 633 that collects the drain generated in the exhaust pipe 62 into the water supply tank 21.

  In FIG. 4, reference numeral 64 denotes an exhaust temperature sensor that detects the temperature in the exhaust pipe 62. The normally open manual valve B and the exhaust valve 62a are normally open manual valves that are closed at an arbitrary timing.

Next, the operation will be described.
First, “about the pipe repair technique” will be described, and then the operation in the pipe repair system of the first embodiment will be described separately as “lining accuracy maintaining action” and “energy recovery action”.

[About pipe repair technology]
FIG. 5 is a schematic diagram showing a conventional pipeline repair system.

  2. Description of the Related Art Conventionally, in a pipeline repair system for repairing an existing pipeline, as shown in FIG. 5, mixing is performed from one end 2a of a repair liner 2 arranged in the existing pipeline 1 in order to line the repair liner. After supplying steam and passing through the repair liner 2, the mixed steam is discharged from the other end 2b.

  However, since the mixed steam discharged from the repair liner is released to the atmosphere in the pipe repair system having such a configuration, the thermal energy of the discharged mixed steam is also released into the atmosphere. Heat energy, that is, waste heat energy remaining in the discharged mixed steam was wasted. In particular, the boiler fuel consumption during heat curing was large and the energy efficiency was poor.

  In addition, since the discharged mixed steam is hot, a large amount of steam is generated at the same time as being released to the atmosphere, and steam may accumulate around the construction site. In addition, the steam surrounding the site may be misunderstood by neighboring residents as a fire. Furthermore, the exhaust noise generated when the mixed steam is discharged is loud, and noise may be generated.

  That is, in the method of releasing the mixed steam after lining the repair liner to the atmosphere, there is a possibility that the heat energy is wasted and a large amount of steam and noise is generated, which causes annoying surroundings.

  Further, in this pipeline repair system, it is necessary to properly line the repair liner, and a sufficient amount of mixed steam necessary for the lining must be generated. On the other hand, there is also a demand for suppressing the running cost by suppressing the boiler fuel used when generating the mixed steam as much as possible.

  The present inventors focused on the point that energy efficiency can be improved while appropriately lining the repair liner by suppressing the mixed steam released to the atmosphere in response to the above problems and requirements. . And according to this attention point, while adjusting the pressure of the mixed steam used for lining, the structure which collect | recovers the thermal energy which this mixed steam has in the water in the feed water tank of a boiler was employ | adopted.

[Lining accuracy retention]
In order to repair the existing pipeline 1 in the pipeline repair system according to the first embodiment, the boiler 22 heats the water W1 in the water supply tank 21 to generate high-temperature steam, and the compressor 23 compresses the air to compress the compressed air. Generate. The high temperature steam flows into the mixed steam supply path 30 through the high temperature steam supply path 31, and the compressed air flows into the mixed steam supply path 30 through the compressed air supply path 32. The high temperature steam and the compressed air mixed in the mixed steam supply path 30 become mixed steam and flow into the insertion hose 15 inserted in the repair liner 2 through the air supply port 11 of the plug device 10. Then, when the mixed steam that has passed through the insertion hose 15 blows out from the opening 15 a of the insertion hose 15, it flows toward the exhaust port 12 while heating the inner surface of the repair liner 2, and is discharged from the exhaust port 12. As a result, the repair liner 2 is lined in the pipe 1. On the other hand, after the exhausted mixed steam flows through the mixed steam discharge path 40, the exhaust heat is recovered in the water W1 in the water supply tank 21 when passing through the heat recovery section 60, and then is discharged from the exhaust pipe 62 to the atmosphere. Discharged.

  Here, in the pipe line repair system according to the first embodiment, the pressure adjusting valve 50 that adjusts the mixed steam pressure in the primary side pipe 41 to a required value for lining the repair liner 2 at a midway position in the mixed steam discharge path 40. Was provided.

By adopting the above configuration, the pressure of the mixed steam on the upstream side of the pressure adjusting valve 50 becomes the required value, and the pressure in the repair liner 2 is also adjusted to the required value for lining.
In particular, in the pipeline repair system of the first embodiment, the pressure adjustment valve 50 is an electric automatic valve that automatically adjusts the mixed steam pressure in the primary side pipe 41 based on the detection value of the mixed steam discharge side pressure sensor 51. . As a result, the pressure adjustment of the mixed steam can be facilitated, and the adjustment accuracy can be improved to improve the lining accuracy of the repair liner 2.

[Energy recovery function]
FIG. 6 is an explanatory diagram schematically showing a heat account in the lining work.

  As shown in FIG. 6, energy supplied to the repair liner 2 (hereinafter referred to as supply energy) includes energy used for the lining of the repair liner 2 (hereinafter referred to as repair system required energy), and the repair liner 2 It is the sum total of the energy of the mixed steam (hereinafter referred to as mixed steam energy). By performing the lining operation, the mixed steam energy gradually becomes necessary energy for the repair system. Usually, in order to line the repair liner 2 reliably, the supply energy is set to be larger than the energy required for the repair system in consideration of energy loss and the like. That is, since the supply energy is larger than the energy required for the repair system, the mixed steam discharged after lining always has exhaust heat energy.

  Here, in the pipeline repair system of the first embodiment, the heat recovery unit 60 that recovers the exhaust heat of the mixed steam in the secondary side pipe 42 to the water W1 in the water supply tank 21 is provided in the secondary side pipe 42. It was set as the structure provided in the downstream end part.

  By adopting the above configuration, the exhaust heat of the mixed steam in the secondary side pipe 42 is recovered to the water W1 in the water supply tank 21, so that the exhaust heat, that is, the residual energy is used to heat the water W1. Can do. Moreover, since the boiler 22 heats the water W1 from which the exhaust heat is recovered to generate high-temperature steam, the energy (boiler energy) consumed by the boiler 22 is the difference between the supply energy and the exhaust heat energy. (See FIG. 6). That is, it is not necessary to cover all of the supplied energy with boiler energy. As a result, the exhaust heat energy can be used without being wasted, boiler energy can be suppressed, and energy efficiency can be improved. Furthermore, the operating rate of the boiler 22 can be lowered by suppressing the boiler energy, which can contribute to the suppression of carbon dioxide emissions.

  In the pipeline repair system of the first embodiment, the heat recovery unit 60 is disposed in the water supply tank 21 and between the water W1 in the water supply tank 21 and the mixed steam in the secondary side pipe 41. An exhaust heat exchange pipe 61 for heat exchange, an exhaust pipe 62 for opening the downstream end of the exhaust heat exchange pipe 61 to the atmosphere, a drain pipe 63 for collecting the drain generated in the exhaust pipe 62 into the water supply tank 21, and The secondary side drain recovery unit 633 including the steam trap 63a is included.

  By adopting the above configuration, exhaust heat can be efficiently recovered, and sensible heat of the drain generated in the exhaust pipe 62 can also be recovered to the water W1, thereby further improving energy efficiency. be able to. On the other hand, the air contained in the mixed steam is released to the atmosphere through the exhaust pipe 62. At this time, since the water vapor in the mixed steam is recovered by the system, the exhaust amount can be suppressed as compared with the conventional case. As a result, exhaust noise is reduced and noise generation can be suppressed.

  In the first embodiment, by providing the plurality of exhaust heat exchange tubes 61,..., The heat transfer area in contact with the mixed steam is increased, so that the heat exchange rate can be improved.

  Furthermore, in the pipe line repair system according to the first embodiment, a separator 41b that collects the drain generated in the primary side pipe 41 in the water supply tank 21, the primary side drain pipe 41d, and the steam trap 41c are disposed at a midpoint of the primary side pipe 41. The primary side drain recovery unit 411 is provided.

  By adopting the above configuration, not only the pressure adjustment accuracy of the pressure adjustment valve 50 can be improved, but also the sensible heat of the drain generated in the primary side pipe 41 can be recovered into the water W1, and further energy can be obtained. Efficiency can be improved.

  Furthermore, in the pipe line repair system according to the first embodiment, the boiler 22 has an economizer 22a that heats the water W1 of the water supply tank 21 with exhaust gas.

  By adopting the above configuration, the water W1 can be heated using the latent heat of the exhaust gas from the boiler 22 and further energy efficiency can be improved.

  Furthermore, in the pipe line repair system according to the first embodiment, the mixed steam supply mechanism 20 automatically mixes at least one of the flow rate and pressure of the high-temperature steam according to the required temperature of the mixed steam in the mixed steam supply path 30. The steam temperature automatic adjustment valve 26 and the compressed air adjustment valve 27 that adjusts the compressed air according to the required flow rate and required pressure of the mixed steam in the mixed steam supply path 30 are used.

  By adopting the above configuration, the temperature and pressure of the mixed steam supplied to the repair liner 2 can be adjusted to an appropriate state, and the supply energy is adjusted to be approximately the same as the repair system energy requirement. Is done. Therefore, waste of supply energy can be suppressed, exhaust heat energy can be reduced, and further energy efficiency can be improved.

  Furthermore, in the pipe line repair system according to the first embodiment, the plug device 10 is attached to one end 2a of the repair liner 2, and includes a connecting jig 14 having an air supply port 11 and an exhaust port 12, and a supply jig. And an insertion hose 15 inserted into the repair liner 2 through the air port 11, the mixed steam supply path 30 is connected to the air supply port 11, and the primary side pipe 41 of the mixed steam discharge path 40 is connected to the exhaust port 12. It was set as the structure connected.

  By adopting the above configuration, the mixed steam is supplied from one end 2a of the repair liner 2, circulated through the repair liner 2, and then discharged from the one end 2a again. That is, the mixed steam is supplied and exhausted from the same end 2 a of the repair liner 2. Therefore, the mixed steam supply mechanism 20 and the heat recovery unit 60 can be disposed close to each other, and the loss of recovered exhaust heat can be suppressed to further improve the energy efficiency.

  In the pipeline repair system according to the first embodiment, the temperature of the water W1 is increased by about 40 to 20% from the conventional level by recovering the exhaust heat of the mixed steam after lining to the water W1 in the water supply tank 21. Can be made. That is, the boiler energy consumed by the boiler 22 can be suppressed by about 40 to 20%. And a boiler operation rate can be suppressed and it can also contribute to the reduction of a carbon dioxide discharge.

Next, the effect will be described.
In the pipe line repair system according to the first embodiment, the effects listed below can be obtained.

  (1) A mixed steam supply mechanism 20 for supplying a mixed steam obtained by mixing compressed air and high-temperature steam, a plug device 10 attached to the end of the repair liner 2, the mixed steam supply mechanism 20 and the plug device 10 In the pipeline repair system that includes the mixed steam supply path 30 to be connected and lines the repair liner 2 in the existing pipe line 1 with the mixed steam, the mixed steam supply mechanism 20 uses the water W1 in the water supply tank 21. The plug device 10 has a boiler 22 that generates high-temperature steam by heating, and is connected to the mixed steam discharge path 40 provided with a pressure adjusting valve 50 at an intermediate position. A primary side pipe 41 located on the upstream side of the regulating valve 50, and a secondary side pipe 42 located on the downstream side of the pressure regulating valve 50 and provided with a heat recovery part 60 at the downstream end, The pressure adjustment valve 50 adjusts the pressure of the mixed steam in the primary side pipe 41 to a required value for lining the repair liner 2, and the heat recovery unit 60 is provided in the secondary side pipe 41. The exhaust heat of the mixed steam is recovered into the water W1 in the water supply tank 21. Thereby, the energy efficiency can be improved while appropriately lining the repair liner 2.

  (2) The pressure adjusting valve 50 automatically adjusts the pressure of the mixed steam according to the detection value of the mixed steam discharge side pressure sensor 51 that detects the pressure of the mixed steam in the primary side pipe 41. As a result, the pressure adjustment of the mixed steam can be facilitated, and the adjustment accuracy can be improved to improve the lining accuracy of the repair liner 2.

  (3) The heat recovery unit 60 is disposed in the water supply tank 21 and performs heat exchange between the water W1 in the water supply tank 21 and the mixed steam in the secondary side pipe 42. 61, an exhaust pipe 62 that opens the downstream end of the exhaust heat exchange pipe 61 to the atmosphere, and a secondary-side drain collection section 633 that collects the drain generated in the exhaust pipe 62 into the water supply tank 21. Since the drain pipe 63 and the steam trap 63a are provided, the heat exchange rate can be improved, and the heat of the drain generated in the exhaust pipe 62 can be recovered in the water W1 in the water supply tank 21, further energy efficiency. Can be improved.

  (4) The primary side pipe 41 includes a separator 41b, a primary side drain pipe 41d, and a steam, which serve as a primary side drain collection unit 411 that collects the drain generated in the primary side pipe 41 at a midway position in the water supply tank 21. Since the trap 41c is provided, the heat of the drain generated in the primary side pipe 41 can also be recovered in the water W1 in the water supply tank 21, and further energy efficiency can be improved.

  (5) Since the boiler 22 has an economizer 22a that heats the water W1 of the water supply tank 21 with exhaust gas, the heat of the exhaust gas discharged from the boiler 22 can also be recovered in the water W1 in the water supply tank 21. And further energy efficiency can be improved.

  (6) The mixed steam supply mechanism 20 includes a mixed steam temperature automatic adjustment valve 26 that adjusts at least one of a flow rate and a pressure of high-temperature steam according to a required temperature of the mixed steam in the mixed steam supply path 30; Since the compressed air adjustment valve 27 that adjusts the compressed air according to at least one of the required flow rate and the required pressure of the mixed steam in the mixed steam supply path 30 is provided, the supply energy is substantially the same as the energy required for the repair system. It can be adjusted to be.

  (7) The plug device 10 is attached to one end 2 a of the repair liner 2, and has the connecting jig 14 having an air supply port 11 and an exhaust port 12, and the repair via the air supply port 11. An insertion hose 15 inserted into the liner 2, the mixed steam supply path 30 is connected to the air supply port 11 of the connecting jig 14, and the primary side pipe 41 of the mixed steam discharge path 40 is Since it is connected to the exhaust port 12 of the connecting jig 14, the mixed steam is supplied and discharged from the same end portion of the repair liner 2, and the mixed steam supply mechanism 20 and the heat recovery unit 60 can be disposed close to each other. Further, it is possible to further improve energy efficiency by suppressing the loss of recovered exhaust heat.

  As mentioned above, although the pipe line repair system of this invention has been demonstrated based on Example 1, it is not restricted to this Example about concrete structure, The summary of the invention which concerns on each claim of a claim As long as they do not deviate, design changes and additions are permitted.

  In the first embodiment, the downstream end of the secondary side pipe 42 is branched into a plurality of paths, and the exhaust heat exchange pipe 61 is connected to each of them to expand the heat transfer area in contact with the mixed steam. However, in order to improve the heat exchange efficiency, the heat transfer area with which the mixed steam is in contact should be large. Therefore, the exhaust heat exchange pipe 61 having a large heat transfer area by meandering or winding in a coil shape is provided on the secondary side. You may connect to the pipe | tube 42 (refer Fig.7 (a), (b)). Further, each of the plurality of exhaust heat exchange tubes 61 may be meandered or wound in a coil shape (see FIGS. 7C and 7D).

  In Example 1, the example which collect | recovers waste heat to the water W1 in this water supply tank 21 by arrange | positioning in the water supply tank 21 the waste heat exchange pipe | tube 61 through which the mixed steam discharged | emitted from the repair liner 2 passes is shown. It was. However, as shown in FIG. 8, for example, a heat exchange space 65 is formed as a heat exchange means at the downstream end of the secondary side pipe 42, and a midway position of the water supply pipe 24 is wound in a coil shape. It is good also as an example which arrange | positions 24 winding parts in the heat exchange space 65. FIG. That is, it is good also as a structure which collect | recovers the waste heat of mixed steam to this water W1 by allowing the water W1 of the water supply tank 21 to pass through in the atmosphere of the discharged mixed steam.

  In the first embodiment, the pressure adjustment valve 50 automatically adjusts the mixed steam pressure in accordance with the detection value of the mixed steam discharge side pressure sensor 51. It may be a manual valve that performs pressure adjustment. Further, a semi-automatic (semi-automatic) valve that automatically adjusts the pressure according to a set value that is manually set based on the detection value of the mixed steam discharge side pressure sensor 51 may be used.

  Furthermore, in the first embodiment, the mixed steam temperature automatic adjustment valve 26 is an automatic valve, and the compressed air adjustment valve 27 is a manual valve, but each may be an automatic valve or a manual valve. When the compressed air adjustment valve 27 is an electric valve, only the compressed air flow rate is automatically adjusted according to the detection value of the air flow meter 29c.

  In the first embodiment, an example of a pipe repair system in which a repair liner made of a tube impregnated with a thermosetting resin is heated with mixed steam is shown. However, the present invention is a pipe for lining a thermoplastic resin repair liner. It can also be applied to repair systems. In short, the present invention can be applied to any pipeline repair system in which resin is lined in an existing pipeline using mixed steam.

It is a lineblock diagram showing the whole pipe line repair system composition of Example 1. It is a block diagram which shows the detailed structure of the boiler periphery of the pipe line repair system shown in FIG. It is a block diagram which shows the detailed structure of the compressor periphery of the pipe line repair system shown in FIG. It is a block diagram which shows the detailed structure of the water supply tank periphery of the pipe line repair system shown in FIG. It is a schematic diagram which shows the conventional pipe line repair system. It is explanatory drawing which showed typically the heat bill in a lining operation | work. It is a lineblock diagram showing the modification of the exhaust heat exchange pipe of the pipe line repair system of Example 1. It is a block diagram which shows the modification of the heat recovery means of the pipe line repair system of Example 1.

Explanation of symbols

1 pipeline (existing pipeline)
2 Repair liner 10 Plug means (plug device)
11 Air supply port 12 Exhaust port 14 Common plug part (connection jig)
15 Insertion member (insertion hose)
20 Mixed steam supply means (mixed steam supply mechanism)
21 Water supply tank 22 Boiler 22a Economizer 23 Compressor 26 High temperature steam adjustment means (mixed steam temperature automatic adjustment valve)
27 Compressed air adjusting means (Compressed air adjusting valve)
30 Mixed steam supply path 40 Mixed steam discharge path 41 Primary side pipe 411 Primary side drain recovery part 42 Secondary side pipe 50 Pressure adjusting means (pressure adjusting valve)
51 Pressure detection means (mixed steam discharge side pressure sensor)
60 Heat recovery means (heat recovery part)
61 Waste heat exchange pipe 633 Secondary drain recovery unit

Claims (7)

Mixed steam supply means for supplying a mixed steam obtained by mixing compressed air and high-temperature steam, plug means attached to the repair liner end, and a mixed steam supply path for connecting the mixed steam supply means and the plug means In a pipeline repair system for lining the repair liner in an existing pipeline with mixed steam,
The mixed steam supply means has a boiler that generates high-temperature steam by heating water in a water supply tank,
The plug means is connected to a mixed steam discharge passage provided with a pressure adjusting means in the middle position,
The mixed steam discharge passage has a primary side pipe located upstream of the pressure adjusting means and a secondary side pipe located downstream of the pressure adjusting means and provided with a heat recovery means at the downstream end. And
The pressure adjusting means adjusts the pressure of the mixed steam in the primary side pipe to a required value for lining the repair liner,
The heat recovery means recovers the exhaust heat of the mixed steam in the secondary side pipe into the water in the water supply tank. In the pipeline repair system according to claim 1,
The said pipe | tube repair system characterized by the above-mentioned. The said pressure adjustment means adjusts the pressure of this mixed steam automatically according to the detected value of the pressure detection means which detects the pressure of the mixed steam in the said primary side pipe | tube. In the pipeline repair system according to claim 1 or claim 2,
The heat recovery means is disposed in the water supply tank and exchanges heat between the water in the water supply tank and the mixed steam in the secondary side pipe, and a downstream of the exhaust heat exchange pipe A pipe line repair system comprising: an exhaust part for opening an end part to the atmosphere; and a secondary side drain recovery part for recovering drain generated in the exhaust part into the water supply tank. In the pipe line repair system according to any one of claims 1 to 3,
The pipe side repair system, wherein the primary side pipe is provided with a primary side drain collecting part that collects the drain generated in the primary side pipe in the water supply tank at an intermediate position. In the pipeline repair system according to any one of claims 1 to 4,
The boiler has a economizer that heats water in the water supply tank with exhaust gas. In the pipeline repair system according to any one of claims 1 to 5,
The mixed steam supply means includes a high temperature steam adjusting means for adjusting at least one of a flow rate and a pressure of the high temperature steam in accordance with a required temperature of the mixed steam in the mixed steam supply path, and a mixed steam in the mixed steam supply path. And a compressed air adjusting means for adjusting the compressed air according to at least one of the required flow rate and the required pressure. In the pipeline repair system according to any one of claims 1 to 6,
The plug means is attached to one end portion of the repair liner, and is inserted into the repair liner through a common plug portion having an air supply port and an exhaust port, and an air supply port of the common plug portion. An insertion member,
The mixed steam supply path is connected to an air supply port of the common plug part, and a primary side pipe of the mixed steam discharge path is connected to an exhaust port of the common plug part.

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