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    公开号:DK200700299U1
    申请号:DK200700299U
    申请日:2007-12-10
    公开日:2008-05-23
    发明作者:Driver Franklin Thomas；Steve J Hirtz；Richard C Polivka；James H Blasczyk；Birchler Neil；Costa Kyle
    申请人:Ina Acquisition Corp；
    IPC主号:
    专利说明:

    DK 2007 00299 U3
    Double-pack air inversion apparatus and steam curing of CIPP liners CROSS REFERENCE TO RELATED APPLICATIONS 5 The application is based on the claims and benefits of the provisional U.S. Patent Application Serial No. 60 / 708,934, filed August 17, 2005.
    BACKGROUND OF THE MAKING
    The invention relates to inverting and installing a CIPP liner by air inversion and vapor curing and an apparatus having dual, rigid gaskets to invert and cure the liner. The methods and apparatus enable the use of a retention strap to control the rate at which the inversion takes place and a perforated, flat-laid stocking element for introducing steam for curing and with an exhaust port for uninterrupted flow, without deflating the liner prior to curing. steam. The methods and apparatus are particularly well suited for installing linings from approx. 45 cm to 90 cm (18 "to 36") to approximately 182 cm (72 ") and larger
    It is generally well known that pipelines or pipelines, especially underground pipes, such as sanitary sewer pipes, storm sewer pipes, water pipes and gas pipes used to convey fluids, often need to be repaired as a result of fluid leakage or degradation. The leakage may go inward from the surroundings and into the interior or conveying portion of the pipelines. Alternatively, leakage may extend outward from the advancing portion of the pipeline into the surroundings. Regardless of what is the case, it is desirable to avoid such leakage.
    The leak may be due to improper installation of the original pipe or breakdown of the pipe itself as a result of normal aging or the effect of advancing corrosive or abrasive material. Cracks at or near pipe joints may be due to environmental conditions such as earthquakes or movements of large vehicles on the earth's surface or similar natural or man-made vibrations or other such causes. Whatever the reason, such a leak is undesirable and can result in wastage of the fluid conveyed in the pipeline or result in damage to the environment and possible risk of public health hazard. If leakage 5 continues, it could lead to construction breakdown of the existing pipeline as a result of ground loss and pipeline side support.
    Due to the ever-increasing costs of labor, energy and machinery, it is becoming increasingly difficult and less economical to repair sub-10 underground pipes or parts that may be leaking by digging up and replacing the pipes. As a result, various approaches have been devised to repair or rehabilitate existing pipelines while in place. These new approaches avoid the expense and risk of digging up and replacing the pipes or pipe sections, as well as significant public nuisance. One of the most successful currently widely used processes to repair or rehabilitate without excavation is the one widely referred to as the fnsituform® process. This process is described in U.S. Patent Nos. 4,009,063, 4,064,211, and 4,135,958, the contents of which are incorporated herein by reference herein.
    In the standard practice of the Insituform process, an elongated, flexible tubular lining of a felt, foam or similar resin impregnable material is installed within the existing pipeline with an exterior impervious coating that has been impregnated with a heat-curing resin. Generally, the lining is installed using a turning process as described in the later two identified Insituform patents. In the turning process, radial pressure applied to the interior of a liner that has been "turned out" will push it toward and engage the inner surface of the pipeline. However, the insituform process is also exerted by pulling in a resin impregnated liner in the pipeline by means of a rope or cable and using a separate fluid-impervious discharge bladder or liner, which is "turned out" inside the liner, causing the liner to harden against the inner wall of the existing Such resin impregnated liners are generally referred to as "in-situ hardened" liners or "CIPP liners" and the installation is referred to as a CIPP installation.
    The flexible tubular CIPP liners have an outer, smooth layer of a relatively flexible, substantially impervious polymer coating on the outside of the lining in its initial state. Upon turning, this impermeable layer ends up on the inside of the casing after the casing has been turned during installation. As the flexible liner is installed in place within the pipeline, the pipeline is pressurized from within, preferably using a reversing fluid such as water or air, to force the liner radially outward to engage and adapt to the interior surface of the existing pipeline.
    Typically, a turning tower is erected at the installation site to provide the necessary pressure head to turn the casing or bladder. Alternatively, a reversing unit may be provided as disclosed and described in US Patent Nos. 5,154,936, 5,167,901 (RE 35,944) and 5,597,353, the contents of which are incorporated herein by reference. Curing can be initiated by introducing hot water into the reversed casing through a recirculation hose attached to the end of the casing facing the casing. Inverting water is recycled through a heat source, such as a boiler or heat exchanger, and returned to the inverted liner until curing of the liner is complete. The resin which is impregnated into the impregnable material is then cured to form a hard, tightly sealed tubular liner within the existing pipeline. The new liner effectively seals any crack and repairs any pipe section or pipe assembly damage to prevent further leakage into or out of the existing pipeline. The cured resin also serves to reinforce the existing pipeline wall so as to provide additional structural support to the surroundings.
    4 DK 2007 00299 U3
    The turning tower, which was time consuming to build, meant that workers should be approx. 9 feet (30 feet) above the ground, often near trees and electrical wires. This approach was improved with an apparatus by which Insituform could create a hydraulic head using a sphincter valve. The liner was inserted at the top of the apparatus and was drawn through the sphincter valve with pressurized water under the valve. The pressurized water applied a force to the nose of the casing, inverting it into the tube to be rehabilitated. These small diameter pipe rehabilitation apparatus 10 have been in use for approx. 15 years.
    The main disadvantage of using these appliances with water is the amount and availability of the inversion water. Water should be heated from typically approx. 12 ° C to approx. 82 ° C (55 ° F to about 180 ° F) to effect curing, 15 and then cooled by adding more water to ca. 38 ° C (100 ° F) before discharging into an acceptable disposal system.
    This disadvantage can be overcome by using air instead of water to create the inverting force. Once the impregnated tube is completely inverted, it can subsequently be cured with steam. Although water is needed to produce steam, the amount of water in the form of steam is only 5-10% of what is required for water inversion, curing and cooling. This means that steam can be used even if water is not immediately available in situ. This drastic reduction in the amount of water is the result of the higher energy available from one pound of water in the form of steam compared to one pound of heated water. One pound of steam condensed to one pound of water gives approx. 1000 BTU, while one pound of water gives off only 1 BTU for each degree the temperature drops. This smaller requirement for water, plus what actually equals the heating cycle to fail, reduces the cure cycle and installation time greatly.
    5 DK 2007 00299 U3 When you consider this obvious advantage of using air inversion and steam hardening, how can it have been so long in this industry to move away from water inversion and hot water hardening When water is used to invert the resin impregnated liner, the non-inverted portion of the tube from the inverting nose to the inverting device is kept liquid at a force equal to the amount of water displaced by the liner. In the case of CIPP linings, this means that the effective weight of the tube is substantially reduced, as is the force needed to pull the non-inverted tube forward to the inverting nose. When air is used to create the inverting force, the non-inverted pipe lies at the bottom of the pipe and the air pressure which acts on the inverting nose of the pipe must pull the full weight of the pipe forward.
    Three types of force must be overcome to invert a CIPP liner, regardless of what is used to generate the inversion energy. These forces are: 1. The force needed to invert the liner (flip the liner out). This force varies with the thickness of the casing, the type of material and the ratio of the casing thickness to the diameter.
    2. The force required to pull the liner from the inverting apparatus to the inverting nose.
    3. The force required to pull the liner through the inverting apparatus.
    Force # (1) according to the above is generally the same for both air and water inversion processes.
    Power # 2 varies greatly from air to water and can limit the length of air inversions. There is a limit to how much pressure can be used to invert a casing without adversely affecting the quality of the installed CIPP casing and / or causing damage to the existing pipeline. Lubricants for both water and air inversion can be used to reduce the required traction.
    Power # (3) may vary depending on the design of the device. For most devices currently used, the force required to pull the tube through the device will increase as one or both types of force (1) and (2) increase. It can be attributed to the fact that in order to increase the available inversion energy, the typical apparatus used today will limit the loss of pressurized fluid from the pressure chamber below the entry point of the casing into the apparatus and cuff and banded end of the casing at to be inverted. This limitation is typically achieved by increasing the air pressure in a pneumatic sphincter gasket or by using a gasket energized by the inverting fluid. Typically, the inward movement is limited by the gasket material and the compression of the inverting CIPP liner. This, in turn, causes an increase in friction between the inverted CIPP lining and gasket.
    In view of these obvious advantages of steam curing compared to hot water curing, the use of steam has been suggested in light of the energy it carries. Air inversion of an inflation bladder and flow vapor is disclosed in Insituform US Patents Nos. 6,708,728 and 6,679,293, the contents of which are incorporated herein by reference. The processes described in these recently issued patents utilize the pull-in and inflate technology and are currently in use for small diameter linings. They provide advantages over water misalignment in case of small diameters. However, with the process, it is not possible to use a flat laid stocking for introducing steam. Furthermore, the use of a puncture container described in these patents is not suitable for medium and large diameter linings. Medium-sized liners are generally liners with a diameter of between approx. 0.45 m (18 ") and about 1.2 m (45"). Large diameters are diameters greater than 1.2 m (45 ") and larger.
    Accordingly, it is desirable to provide processes for improved air inversion / vapor curing installation of CIPP liners which allow the use of a retention strap and flat laid stock to disperse vapor into the inverted liner to ensure complete cure without temperature layering, and without that it is necessary to deflate the lining before injecting steam for curing.
    BRIEF DESCRIPTION OF THE MOVEMENT
    Generally described and in accordance with the present invention, a CIPP liner is inverted using an installer with two selectably operable rigid gaskets. The device allows the introduction of a curing fluid after inflation without deflating the liner. Included is an open frame for attaching the liner which is inverted before passing between a first selectively operable rigid gasket used to form an air or vapor seal and a second selectably operable gasket to form an air seal for inversion.
    According to a preferred embodiment of the invention, the inverting apparatus is a vertically arranged frame for placement over the entrance to a manhole so that a resin impregnated liner attached to the frame is inverted and passes through the first and second gaskets into the existing pipeline. The liner has a dry portion attached to and passes through the frame, at least one port for inverting curing fluid is disposed between the two seals. Each pack has two rigid elements. According to an embodiment of the invention, a member is a fixed member on one side and a cooperating, opposing, displaceable, rigid member for forming the gasket. Alternatively, both rigid elements may be displaceable to form the seal. The first or upstream gasket may comprise compressible surface material attached over the rigid members to ensure vapor seal formation during the curing cycle. Preferably, the rigid members are pipe members or tubes where the inverted portion of the liner provides sufficient compressible material to form a suitable vapor seal. The second gasket or air gasket is fixed at a fixed distance during the first half of the inversion, depending on the thickness of the liner. An increase in inversion pressure does not require additional pressure on the resin impregnated liner.
    The portion of the liner attached to the entrance frame passing through the first and second gaskets is kept dry and non-impregnated with resin. At least one fluid port for introducing inverting and then curing fluid is formed through the wall of the dry portion of the liner. In a preferred embodiment of the generation, a first port between the two gaskets is intended to receive inverting fluid, such as air, and is also used to introduce steam during the curing phase. Another port is installed in the wall of the dry portion of the casing downstream of the second packer for introducing inverting fluid, such as air for inverting the casing.
    According to one embodiment of the invention, an inverting reinforcing sleeve of an impregnable material can be placed in the dry inlet portion of the liner so that the invertible liner with impermeable layer on the outer surface easily passes through the dry portion of the liner attached to the frame. . The sleeve facing the impermeable layer of the inverting liner can be lubricated to make it easier to invert through the gasket.
    Selective opening and closing of the gaskets allows passage of a retention cable or belt to control the velocity during the second half of the inversion and passage of a flat outward sock and steam equipment for introducing heated air or steam during curing. The use of a perforated, flattened stocking for steam curing allows steam to be introduced throughout the length of the inverted liner to avoid the consequences of condensate accumulation, which often leads to poorly cured sections of liner in steam curing processes. The double seals allow the flat laid stock with steam attachment to pass through the frame and into the inverted liner without deflating the liner before introducing army defluid. Preferably, the flattened stocking has alternating holes formed in its length, near the edge. Typically, this is 0.6 cm to 1.3 cm (¼ to Ά inch) from the edge of the flat laid stocking. This pattern of holes ensures the distribution of steam at the bottom in the full length of the casing, regardless of the orientation of the stocking.
    A "sample and porting" bushing with at least one pre-installed bulkhead device for forming an exhaust port at the distal end of the inverted liner for receiving a connecting tool may be disposed at the distal access point. When the inversion is first stopped and the distal end of the liner is trapped by the connecting bush, a connecting drill can be used to form an exhaust port in the inflated liner. An adjustable exhaust hose is connected to the exhaust port, and steam is introduced into the casing through the flat-bottomed stocking to cure the resin without allowing the inverted casing to deflate.
    Accordingly, it is an object of the invention to allow an improved method of inverting a CIPP liner.
    It is a further object of the invention to provide a double packer for inverting a CIPP liner with air and curing with steam.
    10 DK 2007 00299 U3
    It is a further object of the invention to allow an improved method of air inversion and vapor curing of a CIPP liner with an apparatus having rigid double gaskets.
    It is a further object of the invention to allow an improved method in which a CIPP liner is inverted with air and cured with steam without deflating the liner after being placed within the existing feed line.
    Still another object of the invention is to provide an apparatus suitable for air inversion and steam curing, wherein the liner is inverted through a segment of liner formed with at least one port for introducing air and / or vapor.
    Still another object of the invention is to allow an improved method of air inversion of a CIPP liner with a retaining strap and a flat laid stock for introducing steam to cure the liner.
    Still other purposes and advantages of the production will be partly obvious and will be apparent from the description.
    Accordingly, the production comprises the apparatus having the features, properties and relationships between elements exemplified in the detailed description and the scope of production will be specified in the claims.
    BRIEF DESCRIPTION OF THE DRAWING
    For a complete understanding of the production, reference is made to the following description, which must be seen in connection with the accompanying drawing, in which: 11 DK 2007 00299 U3
    FIG. 1 is a schematic perspective view of an apparatus with dual, rigid gaskets for air inversion and vapor curing of a CIPP liner designed and arranged in accordance with the production;
    FIG. 2 is a schematic right elevational view of the inverting apparatus of FIG. 1;
    FIG. 3 is a perspective view of the inverter shown in FIG. 1 and 2 with an installed CIPP liner and air and steam connections in place during steam curing in accordance with the generation;
    FIG. 4 is a schematic sectional view showing the position of the gaskets of the apparatus shown in FIG. 3 during the first half of the air inversion;
    FIG. 5 is a schematic cross-sectional view showing the position of the gaskets in the apparatus shown in FIG. 3 at the halfway point of the inversion;
    FIG. 6 is a schematic cross-sectional view showing the position of the gaskets in the apparatus shown in FIG. 3 during the second half of the inversion;
    FIG. 7 is a schematic cross-sectional view showing the position of the gaskets of the apparatus shown in FIG. 3 upon completion of the inversion;
    FIG. 8 is a schematic cross-sectional view showing the preparatory steps for coupling the flat laid stocking to the steam inlet prior to curing;
    Figures 9 (a) and 9 (b) show schematic plan views and cross-sectional views of a flexible connecting bush with installed bulkhead equipment for use with the inverted liner; 12 DK 2007 00299 U3
    FIG. 10 is an enlarged cross-sectional view of the bulkhead equipment shown in FIG. 9, which shows the structural details of connecting an inverted end of a fully inverted liner trapped by the sleeve;
    FIG. 11 (a) -11 (g) are schematic cross-sectional views of the procedure for forming an exhaust port in the inverted liner trapped in the connector bush shown in FIG. 9, and an inverted CIPP liner that enters a "sample-and-porting" liner, before and after connection with a connection tool;
    FIG. 12 (a) and 12 (b) are schematic cross-sectional views of the steps of installing a condensate drain at the distal end of the inverted liner after performing the steps of FIG. 11 (a) -11 (g).
    FIG. 13 is a schematic cross-sectional view showing the position of the gaskets in the apparatus shown in FIG. 3 with an air / steam supply hose attached in preparation for introducing steam for curing; and
    FIG. 14 (a) and 14 (b) show an exhaust connection technique suitable for smaller diameter bushings.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
    An improved method and apparatus for air inversion and steam curing of a CIPP liner is disclosed in accordance with ASTM F1216 Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin Impregnated Tube. The method and apparatus are well suited for installing medium-diameter CIPP linings, working from the surface through structures, such as manholes, to rehabilitate existing, buried pipelines and pipelines.
    13 DK 2007 00299 U3
    An inversion apparatus 11 constructed and arranged in accordance with the production is shown in FIG. 1. The apparatus 11 is a rigid frame dimensioned for placement over the inverting access to the line to be fed. The apparatus 11 is made of metal bars or tubes to form a frame 12 5 of sufficient width "w" to accommodate a flattened CIPP liner to be installed. The frame 12 is substantially rectangular in the embodiment shown and has a rectangular inlet opening. 13 with a plurality of hooks 14 for securing the inverting liner 14. The opening 13 has a thickness T which is selected to allow attachment of the dry portion of an inverted, penetrated liner to hooks 14 and inversion thereof through the entrance opening 13.
    The frame 12 has a height "h" sufficient to support a first or upstream gasket 16 formed by a fixed gasket member 17 and an opposing, cooperating, displaceable gasket member 18 disposed adjacent the inlet 13. A pair of cylinders 19 is attached to the ends of the frame 12 and connected to the displaceable element 18 to displace the element 18 in the direction of the fixed element 17.1 In the embodiment shown, the cylinders 19 are pneumatic air cylinders with linear guide bearings 20a. Cylinders 19 may be any closure mechanism or motor of any type, such as a hydraulic or electrical or mechanical clamping mechanism.
    A second or downstream gasket 21 formed in the same manner as the first gasket 16 has a rigid gasket member 22 attached to the frame 12 and a movable gasket member 23 on a pair of linear guide bearings 20b with a fixed air cylinder 24. The height "h" of the frame 12 is selected to provide sufficient space between the first gasket 16 and the second gasket 21 to utilize a fluid inlet port installed in the dry portion of an inversion liner for introducing air and / or vapor. An inverting fluid inlet port is installed in the dry portion of the inverted liner and placed downstream of the second gasket 21 and prior to the manhole access. A full description of the lining and installation ports will be given in more detail below.
    In the embodiment of FIG. 1, the frame 12 has a base 25 constituted by two side pipes 26 and 27 welded to a rectangular front frame 28 constituted by a bottom pipe 29, two vertical side pipes 31 and 32 and an upper pipe 33. Vertical pipes 31 and 32 are welded to the bottom side tubes 26 and 27. A matching rectangular rear frame 34, which is constituted by a bottom tube 36, two side tubes 37 and 38, and a top tube 39 are welded to the bottom side supports 26 and 27 in the same manner as the front frame 28. A pairs of first horizontal packing support tubes 41 and 42 are secured between front side tubes 31 and 32 of front frame 28 and side tubes 37 and 38 of rear frame 34. Similarly, a pair of supports 43 and 44 are secured between front frame 28 and rear frame 34 to carry the second packing 21. Four angular supporting pipes 46, 47, 48 and 49 are welded between the front and rear sides of the side pipes 26 and 27 to give the frame 12 stability. Although angled support tubes are shown, it is contemplated that rectangular support members forming a step may be used to provide a working platform at or around the height at which the second pack 21 is located.
    20
    Air cylinders 19 are shown mounted over the first gasket 16 and the second gasket 21. Each cylinder is connected to a clutch which then runs on a pair of linear guide bearings 20. Air cylinders 19 each have an air clutch 50 connected to an air switch control pulley 53 shown in FIG. . Third
    25
    The fixed gasket member 17 and the displaceable gasket member 18 of the first gasket 16 have a compressible, high temperature resistant blanket 54 and 56 mounted on the opposing fitting surfaces. This compressible material 54 and 56 will adapt and engage tightly with an inverting liner 30 with a retaining strap and flat protruding stocking as it passes through the first gasket 16 during the second half of the inverting ring. In addition, compressible material 54 and 56 will form an appropriate, conforming seal when the first seal 16 is closed during vapor curing.
    The rigid, cooperating, opposing faces of the elements 22 and 23 of the second package 21 may be flat. Curvature is imparted to the fitting surfaces by welding a small diameter tube on the supports 22 and 23 or by using tube elements or tubes to the element 22 and 23. This curved surface provides a smoother surface for engagement with the inverted liner.
    The second gasket 21 forms the air seal during the air inversion. During the start and the first half of the inversion, the second gasket 21 closes to a distance of approx. four times the thickness of the liner using a spacer setting device. This device may be suitably formed spacers arranged on guide bearings 20a and 20b. When the retaining strap and the flattened stocking first pass through the second gasket during the second half of the inversion, the gap in the second gasket 21 is reduced to approx. twice the thickness of the casing wall.
    Using this construction, an increase in the air pressure for the inversion will cause the liner to invert without an increase in the pressure of the liner at the second gasket 21 of the elements 22 and 23. The air pressure of the cylinders 19 can be increased to prevent the gasket 21 from opening. to a space greater than twice the lining thickness. The spacer adjustment device, such as spacers placed on guide bearings or threaded bolts, prevents a reduction in spacing that goes beyond what is desired.
    The seal around the inverting liner is created at the dry portion of the liner itself so that the seal has an identical profile and dimension. Thus, it is not necessary to deal with forming a seal at the edges of the flattened liner. The length of the edge circumference of the flattened liner is minimal compared to the long sides of the flattened liner so that the load on the edges is minimal and no further closure or support is required at the edges. This allows the use of straight, rigid tubes or carriers to form the gasket and seal. The process and apparatus described provide an advantage over the prior art inverting devices. In these latter devices, it is difficult to form a seal at the edges because the inversion begins downstream of the seal or seal. Here, there is an advantage because the inversion of the liner has begun before the liner passes through a gasket to form an inversion and cure seal.
    FIG. 3 shows the apparatus 11 with an inverted liner 101 attached to hooks 14 on the inlet opening 13 during the steam curing step. The liner 101 is made with a dry end region 102 and is soaked starting right before the inverted liner enters the pipeline to be rehabilitated. An air inlet port 106 is formed in the dry region 102b between the second gasket 21 and the start of soaking at the area 103. An air inlet 20 107 is connected to an air inlet port 106 and an air source (not shown).
    An air / steam inlet port 108 is also installed in the casing area 102a between the first gasket 16 and the second gasket 21. A steam sock 109 is coupled to the steam inlet port 108 and a boiler (not shown).
    25
    The apparatus 11 of FIG. 3 shows an installation and the position of the first gasket 16 and the second gasket 21 after complete inversion and under vapor curing. Here, the first seal 16 is closed and forms a vapor seal over the vapor inlet port 108 where the vapor enters. The second gasket 21 is open and allows steam to pass into the inverted liner 101 through a flattened stocking installed with the liner 101 to effect curing.
    The order of the steps of the inverting and curing is shown schematically in order in FIG. 4 to 13. During the first half of the inversion shown in FIG. 4, the first gasket 16 is open and the second gasket 21 is closed to a gap of 4T (four times the thickness of the liner 101) by means of gap adjustment devices. Inverting air is fed into the air inlet port 106 from an air inlet stock 107 to cause the liner 101 to invert inside the dry liner portion 102b and into the piping being lined. At the halfway point of the inversion, the first gasket 16 is closed to engage with a retaining strap 111 and a flattened stocking 112 as shown in FIG. 5. The flattened stocking 112 has a closed end 112a. Then and during the second half of the inversion as shown in FIG. 6, the second gasket 21 is opened and inversion air is introduced into the air inversion inlet port 106 to complete the inversion. At this point, the second gasket 21 is closed and the first gasket 16 is opened as shown in FIG. 7th
    At this point when the first gasket 16 is open, the flattened stocking 112 is cut off over the first gasket 16 and a steam angle tube is attached to the cut end. The steam angle tube 113 and excess flat-lying stocking 112 are lowered into the frame 12 between the first gasket 16 and the closed second gasket 21 and the angle tube 113 is attached to the back of the air / steam port 108. Alternatively, a flexible, flat-lying adapter may be attached to the flat-bottom stocking outside the inverted region, which can then be introduced into the air / steam port to make it easier to add steam to the inverted liner. The flat adapter may be a thin, tubular, rigid, flexible metal bush with a protruding profile that prevents it from being pulled into the air / steam port. The tubular portion of the sleeve is inserted into the cut end of the flat projection and inserted into the inlet port. The flat outward sock is then gripped between the bulging region of the sleeve and the gate. The slack in the flattened stocking 112 will fall into the inverted as the first gasket 16 is closed and the second gasket 21 is opened at the start of the steam cycle as shown in FIG. 13th
    According to one embodiment of the invention, an inverting reinforcing sleeve 115 of an impregnable material may be placed in the dry inlet portion of the liner to facilitate the inversion through the gasket. In that case, an inverted liner with impermeable layer on the outer surface can easily pass through the dry portion of the liner attached to the frame. The sleeve facing the impermeable layer of the inverting liner can be lubricated to make it even easier to invert through the gasket.
    Immediately after complete inversion, inverting liner 101 is connected in the downstream access port. A flow port 130 at the inverted distal end of the stool 101 as shown in FIG. 10 is formed without allowing the liner 101 to deflate. A flexible connection bush 117 as shown in FIG. 9 (a) and 9 (b) are attached to the receiving manhole. The sleeve 117, which may be rigid at smaller diameters, comprises an exhaust bulkhead 118 and a condensate drain bulkhead 119. In FIG. 9, a bracket 110 is shown in cross-section attached to the sleeve 117 with a flange 121 and bolts 122. The sleeve 117 is secured at the receiving end of the existing pipeline and the liner 101 is inverted through the sleeve and retained therein. At this point, an exhaust port 130 and a condensate port 163 are formed by the bulkheads 118 and 119 which have the mounting sleeve 139 installed in the connection bush 117, using the procedure outlined in FIG. 11 and 12.
    Exhaust port 130 is formed at the distal end following the steps shown in FIG. 11 (a) -11 (g). The connector bush 117 may be formed of a length of CIPP liner material provided with a second bulkhead 119 to form the second port 163 to a condensate drain 164 as shown in FIG. 14 (a) and 14 (b).
    A cap 138 is removed and a ball valve 171 is installed on the bracket sleeve 139. The ball valve 171 is closed with a pinch 172 installed thereon. A hollow saw 173 with a drill stem 174 is inserted into the nipple 172 and a threaded guide 176 for the hollow saw drill stem is secured to the end of the nipple 172. A drill 173 is secured to the stem 174. The ball valve 171 is opened on the port 130 or 163 and the drill 177 is started to cutting a hole 130 and 163 while maintaining the air pressure in the liner 101. When the port 130 and 163 are completely cut, the ball valve 171 and the bore 177 and the hole saw 173 are removed from the bracket 131. The exhaust hose 61 is then attached to the nipple 172.
    The condensate port 163 can be formed by following the same steps as shown in FIG. 11 (a) to 11 (g). After removal of the drill 177, a condensate pipe gasket 181 is applied to the nipple 172 and a condensate drain hose 182 is placed in the gasket 182 all the way to the bottom of the liner 101. The gasket 181 is tightened to prevent movement of the hose 182. condensate ports using a connection tool as shown in FIG. 14 (a) and 14 (b).
    Referring now to FIG. 13, where steam is introduced into the attached, perforated, flat-bottomed stocking 86 to initiate curing of the resin in inverted liner 101 with gaskets 16 and 21 in the position shown in FIG. 3.1. An exemplary embodiment of the production, the flat-bottomed stocking 86 is a high temperature thermoplastic tube having a diameter of approx. 10 cm (4 ”) with openings with a diameter of approx. 0.3 mm (1/8 inch). The size and spacing may vary depending on the boiler and the size and length of the casing. The openings are created at intervals of approx. 30 cm (1 foot) almost 20 DK 2007 00299 U3 1.25 cm (1/2 inch) from the folded edges at opposite edges. The distance from the edges can vary by size and length.
    The described opening pattern provides more steam at the proximal end of the liner 101 and ensures good mixing even if the stocking 112 is twisted. It also ensures that steam is injected into any condensate formed in the inverted liner to cure the portion of the resin in the liner covered by the condensate lake. Steam is provided from a steam inlet hose which is regulated by a valve manifold. The vapor flow is adjusted to maintain a curing pressure of approx. 3-6 psi until the curing cycle is complete.
    In a typical installation, the openings in a flat outward sock 112 are formed with approx. 30 cm (1 foot) gap when a 10 cm (4 inch) stocking is folded and cut in an alternating pattern approx. 1.25 cm (1/2 inch) from the top and bottom of the folded tube. Thus, two holes are formed at each location so that the two holes are formed in an alternating pattern. The flattened stocking 86 has a closed distal end and its size can range from approx. 5 cm to approx. 20 cm (about 2 to about 8 inches) in diameter. The diameter of the openings ranges from approx. 0.3 cm to approx. 1.25 cm (1/8 inch to Vi inch) and preferably between ca. 0.45 and 0.90 cm (3/16 and 3/8 inch) in diameter. Depending on the specific resin selected, a high exothermic reaction during curing will only require smaller openings, with less steam required to complete curing. In some systems, more than one perforated, flat protruding stocking can be used.
    At the same time, the exhaust port 130, a steam angle tube or a flexible flat-bottom adapter 113 is installed on the proximal end of the flat-bottomed stocking 112 over the inlet opening 13. The angle tube 113 and excess flat-bottomed stocking 112 are lowered through the first gasket 16 and secured to the hooded air / steam port 108. As shown in FIG. 13, the first gasket 16 is then firmly closed and the air / steam supply hose 109 is connected to the steam inlet port 108 of the liner 101 and the second gasket 21 is opened. At this point, air and steam are introduced into the air / steam inlet port 108 and passed through the perforated, flattened stocking to start heating the liner 101. Once a 1.66 ° C (3 ° F) rise in temperature is detected at the distal end, full vapor is applied to effect cure. Exhaust steam is discharged through an exhaust hose connected to the exhaust port 130 at the distal end of the stool 101.
    The installation procedure is as follows.
    1. A soaked CIPP liner with a dry first end is reversed and fed through the entrance opening and secured to hooks. The liner is placed through both gaskets in the manhole entrance of the pipeline. An air hose is attached to the air inlet on the dry portion of the stool.
    2. A 5 cm (2 ") air inlet hose is connected from the exhaust end of the air / steam manifold to the air inlet of the inverting unit. Air pressure and temperature gauges (1 ea) are connected to an air / steam manifold.
    3. A retaining rope and the perforated flat laid stocking are joined to the other end of the ClPP liner. 4. A suitable lubricant is applied to the absorbent felt layers at the inlet to the reinforcing sleeve which is placed in the dry portion of the liner.
    The installation sequence as described in connection with FIG. 4 to 8 are then followed.
    22 DK 2007 00299 U3
    Referring to FIG. 14 (a) and 14 (b) are a PVC or rigid metal pipe mold having an exhaust pipe assembly 161 having a mold 162 and steel pipe 163 in the farthest manhole and it is set up to receive an inversion pipe. As the inverting nose approaches the distal manhole, the velocity of the inversion is reduced to allow the liner to enter the tubular mold 162 and the steel tube 163. The inversion is stopped when the nose of the inverting liner is approx. 1 diameter past the end of the sample mold 162.
    The retaining rope is unfastened and the inverted liner is connected by inserting a steel connecting tube 164 with a piercing point 166 at the lower end and a valve 167 at the upper end. A flange or O-ring 168 is provided at a point on the connecting tube 164 to prevent the tube 164 from piercing the opposite side of the liner.
    One of the crew responsible for making this connection informs the inverting end that he is getting ready to connect the inverted liner so that they are prepared to adjust the air supply to maintain pressure on the inverted liner , once connected.
    Once the liner has been successfully connected, the connecting pipe valve 167 is closed and an exhaust hose with a valve at the far end is attached to the connecting pipe valve 167. The control of the exhaust is now at the far end of the exhaust hose.
    At the completion of the inversion, the control of the exhaust is now at the far end of the exhaust hose. The exhaust valve and air inlet control device are adjusted as needed to maintain good flow and recommended heating and curing pressure. Exhaust and condensate ports are installed as shown in FIG. 11 {a) through 11 (h).
    23 DK 2007 00299 U3
    The boiler outlet is closed and the steam supply hose is attached to the air / steam manifold. The heating is then started. The temperature of the inner surface at the 6 o'clock position in the distant manhole is monitored. The mixture of air and steam for heating should be at approx. 82 ° C (180 ° F) and continues until there is a 1.66 ° C (3 ° F) rise at the remote manhole interface. Once the heating is complete, the amount of air in the air-vapor mixture is slowly reduced to zero and full vapor flow is maintained at 107 to 115 ° C (225 to 240 ° F) at the recommended curing pressure. Full steam curing is continued for between 1 and 4 hours as needed depending on the length and thickness of the liner as well as the surrounding environment.
    Once the curing cycle is complete, the steam is slowly shut off and air is added at the same time to maintain the recommended cure pressure. The liner is then cooled for a minimum of 15 minutes or until the interface temperature is 54 ° C (130 ° F) at the far end, whichever is longer.
    The steam supply is then switched off at the boiler. When the pressure on the boiler supply hose reaches zero, the steam supply hose is disconnected. When cooling is complete, the air compressor is shut off and the pressure in the air hose is released and the air supply hose is disconnected.
    At this point, the ends are removed from the lined pipe and service is reinstalled by standard procedures.
    The flexible CIPP lining is of the type well known in the art. It is formed of at least one layer of a flexible resin impregnable material, such as a felt layer with an externally impermeable polymer film layer. The felt layer and film layer are fastened along a seam line to form a tubular liner. A compatible thermoplastic film in the form of a tape or extruded material is applied to or extruded over the seam line to ensure that the liner is impemnable.
    Several layers of felt material can be used for larger diameter linings. The felt layers may be natural or synthetic, flexible resin absorbable materials such as polyester or acrylic fibers. The outer layer of impermeable film may be a suitable polyolefin, such as polypropylene, or other high performance polymer which can withstand vapor temperatures as will be well known in the art. In the initial stage of all rehabilitation systems without excavation, the existing wash and video pipeline is being prepared.
    Prior to installation, a curable, thermosetting resin is impregnated in the felt by a liner by a process called "soaking." The soaking process generally involves injecting resin into the felt layer through the end or an opening formed in the impermeable film layer, sucking a vacuum, and passing. Such a procedure for such vacuum impregnation is described in Insituform US Patent No. 4,366,012, the contents of which are incorporated herein by reference. are used, such as polyester, vinyl esters, epoxy resins, etc., which can be modified as desired. It is preferred to use a resin which is relatively stable at room temperature but which cures immediately upon heating.
    Air inverting and steam curing installation of CIPP (Cured In Place Pipe) liners as described herein is a cost effective and efficient method of installing and curing medium to large diameter linings approx. 45 cm to 60 cm (18 ”-24”). Using evaporation to cure without deflating the inverted liner requires procedures very different from the more typical hot water curing of these same diameter CIPP liners. Using steam to cure medium and large diameter CIPP liners 25 DK 2007 00299 U3 also requires technology other than that used for steam curing small diameter C1PP liners approx. 15 cm ~ 38 cm (6 "-15").
    When used properly, steam is a far more environmentally friendly curing method than 5 water, in that it consumes only approx. 5% of the water and between approx. 15 to 30% of the energy that would be used for hot water curing. Previous attempts to extend the use of steam hardening of CIPP linings to diameters of approx. 45 cm (18 ") and above has often resulted in incomplete curing of the lower part of the installed CIPP liner. Attempts to overcome this problem in the context of curing using large amounts of steam and / or steam and air have been crowned with only slight success. In addition, the introduction of large quantities of steam tends to extend the time of the curing cycle and increase energy consumption. Even with extended cure cycle and additional energy, it is difficult to achieve effective cure under certain field conditions. It is believed to have been attributed to temperature stratification and the occurrence of condensation areas that accumulate in low sections of the pipe and the curing lining. The collected condensate insulates and prevents heat transfer to the resin laminate from the overlying vapor blanket.
    Curing with hot water of medium to large diameter CIPP linings typically requires between approx. 1500 and 2500 BTU per pounds hardened resin. In contrast, small-diameter steam-cured linings require approx. 15 cm to approx. 30 cm (6 "to 12") approx. 700 to 1000 BTU per pounds hardened resin.
    With the methods described, a complete CIPP cure is consistently provided with approx. 300 to 500 BTU per pounds of resin, even with areas of condensate lakes that accumulate at the bottom of the CIPP liner. This is possible because the use of a steam injection method which controls the steam injection locations to eliminate the temperature stratification and the negative effect on curing of condensate lakes. The process also controls the quantity and location of vapor injection to the extent of the CIPP liner to maximize the heat transfer from each pound of vapor to the resin infill laminate before being ejected from the far end of the CIPP liner as condensate or water vapor.
    As described herein, steam is injected into a closed end hose which inserts it inverted by the extended CIPP liner. Independent exhaust port (s) with a control valve are provided to control the exhaust of water vapor and condensate from the distal end of the CIPP liner. The hose contains a number of apertures of appropriate size and with the size, thickness and length of the installation appropriate distance, to the full extent of the hose. The location of the openings around the circumference of the tubing is such that, regardless of the orientation of the tubing during placement in the CIPP liner, a number of openings to the extent of the tubing will be directed to the bottom of the CIPP liner. This creates a continuous injection of steam into any lake of condensate throughout the curing cycle. The vapor injected into the condensate heats the condensate to a temperature higher than that required for safe curing.
    The closed end of the vapor injection hose allows the internal pressure of the injected hose to be higher than the internal curing pressure of the CIPP liner. As the injected vapor moves to the extent of the hose, it is forced out through the openings, forming a vapor blanket inside the CIPP liner. The differential between the internal pressure in the steam injection hose and the internal pressure in the CIPP becomes smaller as the steam moves away from the injection end of the steam injection hose. Therefore, the volume of vapor injected from each orifice decreases to the extent of the vapor injection tube.
    Hereby three things are achieved: 27 DK 2007 00299 U3 1. Increase in residence time when most of the steam is available inside the CIPP liner, in order to maximize the energy transfer to the resin felt laminate.
    5 2. Continuous addition of additional energy to the vapor blanket as it moves toward the exhaust end of the CIPP liner to maintain the rate of energy transfer.
    3. Vapor injection in the vapor blanket also causes turbulence, eliminating 10 temperature stratification and increasing energy transfer. 1 Knowing the physical properties of the CIPP lining (diameter, length, thickness, resin and catalyst system) and available boiler output measured in BTU per per hour, you can adjust the opening size to match the boiler output in pounds of steam per hour. hour with recommended cure cycle time.
    It will be readily apparent that the process as described immediately enables the benefit of being able to cure a resin lining with flow through steam. In carrying out the process, a tubular member can be easily inverted through an existing pipeline. Providing an apparatus with two rigid gaskets allows an inversion liner to be installed with a retaining strap and a flat protruding sock. Using spacer setting devices to maintain the gap at the second gasket allows increasing the "reverse" pressure to be applied to complete the lining profile without increasing the gasket pressure on the inverting liner. in the inverted liner to utilize the greater energy available in the steam and which significantly shortens the curing cycle compared to curing with hot water.
    30 It will thus be seen that the foregoing objects, among those which will become apparent from the foregoing description, are effectively achieved, and that certain changes can be made and carried out in the above method and in the design without deviating from the above. from the spirit and scope of the invention, it is intended that all content of the foregoing description and shown in the accompanying drawings be understood to be illustrative and non-limiting.
    It will also be understood that the following requirements are intended to cover all generic and specific features of the production described herein and all indications of the scope of production which, due to linguistic conditions, may be said to lie therebetween.
    权利要求:
    Claims (13)
    [1]
    An air inverting and steam curing apparatus for installing a resin impregnated CIPP liner, comprising: - a rigid frame; - a first rigid, selectively operable gasket allowing a flattened, inverted liner to pass and form a fluid-tight seal around the liner passing therethrough; and - a second, rigid, selectable operable gasket allowing the liner to invert there through and forming a fluid-tight seal around the liner passing through it.
    [2]
    Apparatus according to claim 1, wherein the gaskets are formed by a first and a second gasket element, wherein at least one of the gasket elements is selectively displaceable in order to vary the space between the gasket elements.
    [3]
    Apparatus according to claim 2, wherein the slidable elements are coupled to motors for the purpose of adjusting the space between the elements.
    [4]
    Apparatus according to claim 2, comprising at least one motor mounted on the frame and coupled to the movable packing elements.
    [5]
    Apparatus according to claim 2, comprising a motor mounted on the frame at the end of each displaceable packing element.
    [6]
    Apparatus according to claim 2, wherein the motors are pneumatic cylinders mounted on the rigid frame.
    [7]
    Apparatus according to claim 1, wherein the movable packing elements are displaced on linear guide bearings mounted on the frame. 30 DK 2007 00299 U3
    [8]
    Apparatus according to claim 1, wherein the space between the packing elements of the second packing is fixed at a minimum by means of a space adjustment device to limit the displacement of the moving elements.
    [9]
    Apparatus according to claim 8, wherein the gap adjustment device is at least one spacing element of a desired size to be placed on the guide bearings between the packing elements. 10
    [10]
    Apparatus according to claim 8, wherein the space adjustment device is an adjustment bolt which is adjusted to limit the displacement of the displaceable packing elements.
    [11]
    The apparatus of claim 1, further comprising a plurality of hooks mounted on the frame upstream of the first gasket for mounting the liner to be inverted.
    [12]
    Apparatus according to claim 1, wherein the packing elements are rigid metal bars. 20
    [13]
    Apparatus according to claim 1, wherein the packing elements are metal tubes.
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    IL189509D0|2008-08-07|
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    PL65046Y1|2010-07-30|
    AU2006279596B2|2013-05-16|
    EP1945991A1|2008-07-23|
    US8038913B2|2011-10-18|
    US20090165927A1|2009-07-02|
    RU2008110043A|2009-09-27|
    TW201304938A|2013-02-01|
    DK1945991T3|2011-12-12|
    WO2007022232A8|2008-05-02|
    DE212006000051U1|2008-04-10|
    EP1945991B1|2011-10-12|
    US20070114689A1|2007-05-24|
    AT528571T|2011-10-15|
    TW200724362A|2007-07-01|
    US8066499B2|2011-11-29|
    HK1119759A1|2009-03-13|
    DK200700299U3|2008-09-12|
    WO2007022232A1|2007-02-22|
    NZ565714A|2011-02-25|
    JP5185819B2|2013-04-17|
    MX2008002178A|2008-04-22|
    NO339748B1|2017-01-30|
    PL1945991T3|2012-03-30|
    RU2388959C2|2010-05-10|
    PL64747Y1|2009-12-31|
    ES2375376T3|2012-02-29|
    AU2006279596A1|2007-02-22|
    CA2619729C|2014-04-29|
    JP2009504456A|2009-02-05|
    NO20080825L|2008-05-16|
    CN101268301A|2008-09-17|
    CA2619729A1|2007-02-22|
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    法律状态:
    2016-08-26| UUP| Utility model expired|Expiry date: 20160816 |
    优先权:
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    US70893405P| true| 2005-08-17|2005-08-17|
    US11/504,909|US8066499B2|2005-08-17|2006-08-16|Dual gland air inversion and steam cure of cured in place liners|
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