Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-06-01
1990-08-21
Silbaugh, Jan H.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
118105, 118306, 118DIG10, 156294, 156330, 1563317, 156391, 156423, 156577, 156575, 156578, 264270, 264311, 425262, 425460, 138 97, 138DIG7, B29C 6334
Patent
active
049503561
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a method of and apparatus for lining pipes, especially but not exclusively sewer or gas pipes.
The invention is concerned with improvements in or modifications of the pipe lining methods and apparatus disclosed in our PCT Pat. Application No. PCT/GB86/00486 filed 14th Aug. 1986 (Publication No. W087/01173).
Like the invention disclosed in our aforesaid published Patent Application: existing sewers, especially but not exclusively such sewers having a diameter within the range of 9 inches to 24 inches (23 cms. to 61 cms.). settable, two-component resin based structural lining material consisting of a resin and a curing or hardening agent.
The resin is preferably an epoxy resin but may alternatively be a polyurethane, or other organic coating or lining materials.
The curing or hardening agent and/or the resin may contain inorganic fillers.
The preferred lining composition is a settable two-component epoxy resin-based one containing inorganic fillers. for the description with reference to the drawings which is concerned particularly with lining sewers, but it is clearly to be understood that the term "pipe" includes within its scope sewers, other underground excavations and, in general, any linear hole or passage capable of being lined by the method and apparatus of the present invention.
In our aforesaid published Patent Application there is disclosed a method of lining a pipe comprising the steps of laying along the pipe hose means filled with a predetermined quantity of settable lining composition to be applied against the pipe wall; advancing a centrifugal lining machine along the length of the hose means; axially slitting the hose means in front of the advancing centrifugal lining machine to permit egress of the lining composition from the hose means; and guiding the egressing lining composition into the centrifugal lining machine for application to the pipe wall as it advances along the hose means.
Also disclosed in our aforesaid published Patent Application is apparatus for lining a pipe with a settable lining composition contained in hose means laid along the pipe, the apparatus being adapted to be advanced through the pipe and comprising a centrifugal lining machine having inlet means for the settable lining composition, delivery tube means connected, at one end, to the inlet means and adapted, at the other end, for insertion into the hose means filled with the settable lining composition, and hose-slitting means at or adjacent the other end of the delivery tube means for axially slitting the hose means as the delivery tube means is urged into the hose means, whereby the settable lining composition can flow from the hose means into the delivery tube means and thence to the centrifugal lining machine.
Essential features of our aforesaid published Patent Application and also, it is to be noted, of the present invention are the laying of hose means filled with settable lining composition along the bottom of a pipe to be lined, and the advancement of a lining apparatus along the hose means, which apparatus axially slits the hose means, collects the settable lining composition from the hose means and feeds it to a centrifugal lining machine, which is a part of the apparatus, which centrifugally sprays or throws the settable lining composition onto the pipe wall to line same.
It is preferred to employ two hoses laid in parallel side-by-side relationship, one containing the resin and the other containing the curing or hardening agent (with or without inorganic fillers), and the hoses equalling in length, or substantially so, the length of pipe to be lined. The volumetric capacity of each hose is preferably such as to provide the quantity of resin and hardener sufficient to give a predetermined thickness of structural lining on the pipe wall. Such a thickness may, for example, be within the range of 1% to 5% of the pipe diameter.
Also disclosed in our aforesaid published Patent Application is a trowelling or smoothing method which employs as a trowelling medium a flexible thin-walled
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Silbaugh Jan H.
Tate Pipe Lining Processes Limited
Vargot Mathieu
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