An apparatus and method is provided for repairing an underground structure such as a pipe or manhole. The apparatus includes a liner assembly made of resin absorbent material. Some embodiments may further include a bladder assembly to help position the liner and press the liner against the walls of the underground structure. A sealing member is positioned in the underground structure. In some embodiments the sealing member is a separate member made from a compressible material, an absorbent material, or a hydrophilic or hydrophobic material. In other embodiments the sealing member is a portion of the liner assembly. The sealing member includes one or more channels adapted to receive a semi-liquid such as a hydrophilic or hydrophobic paste or grout. The semi-liquid is capable of swelling in response to being exposed to another liquid, such as water, and forms a seal between the liner assembly and the host pipe/manhole.

Systems and methods for forming and deploying a pipe liner in a pipe main having a service lateral. The line is formed from three pieces of material. The piece of material forming the front top and of the main liner and the front of the lateral line has a cutout at the joint to reduce bunching, which can result in non-uniform liner thickness and may form obstructions at the joint.

A method and means for repairing the junction of a main and lateral pipe are provided. A repair assembly includes a launcher device, a bladder assembly surrounding the launcher device, and a liner assembly surrounding the bladder assembly. The bladder assembly is frangibly connected to the launcher device to maintain the position of the bladder assembly relative to the launcher device during transport and positioning of the assembly. Likewise, the liner assembly, which includes main and lateral liner members, is frangibly connected to the bladder assembly. The frangible connections allow the position of the repair assembly to be maintained. The frangible connections can be broken, such as by inflation and/or tearing or pulling apart of the components of the repair assembly. Thus, the invention provides a way to mitigate the movement of components of the repair assembly during transport and positioning of the repair assembly.

A process and system for applying a liner to an inner surface of a pipeline uses an inversion technique to apply the liner. This involves arranging the liner into everted and non-everted portions and driving the non-everted portion through the pipeline such that it everts and is applied to the inner surface of the pipeline. At least first and second pipeline vehicles are used to drive the non-everted portion of the liner through the pipeline.

An apparatus and method is provided for repairing an underground structure such as a pipe or manhole. The apparatus includes a liner assembly made of resin absorbent material. Some embodiments may further include a bladder assembly to help position the liner and press the liner against the walls of the underground structure. A sealing member is positioned in the underground structure. In some embodiments the sealing member is a separate member made from a compressible material, an absorbent material, or a hydrophilic or hydrophobic material. In other embodiments the sealing member is a portion of the liner assembly. The sealing member includes one or more channels adapted to receive a semi-liquid such as a hydrophilic or hydrophobic paste or grout. The semi-liquid is capable of swelling in response to being exposed to another liquid, such as water, and forms a seal between the liner assembly and the host pipe/manhole.

The present disclosure relates to a pig which is insertable at least partly within a fabric liner sleeve located in a duct and which is capable of heating the liner sleeve in situ in the duct to melt thermoplastic material of the liner sleeve to form, on subsequent cooling of the melted thermoplastic material, a rigid liner in the duct.

The pig comprises: a gas inlet (1008) for receiving pressurised gas; a heating chamber (17) in which the pressurised gas is heated; and a gas outlet (1009) via which pressurised gas heated in the heating chamber (17) is deliverable to the fabric liner sleeve.

The pig comprises a tree diffuser (15) located in the heating chamber (17) via which pressurised gas can be delivered into the heating chamber (17).

The tree diffuser (15) has a plurality of branch pipes (A,B,C) each comprising at least one gas delivery aperture, each branch pipe (A,B,C) extending outwardly from a trunk portion of the tree diffuser (15).

A method and means for repairing the junction of a main and lateral pipe are provided. A repair assembly includes a launcher device, a bladder assembly surrounding the launcher device, and a liner assembly surrounding the bladder assembly. The bladder assembly is frangibly connected to the launcher device to maintain the position of the bladder assembly relative to the launcher device during transport and positioning of the assembly. Likewise, the liner assembly, which includes main and lateral liner members, is frangibly connected to the bladder assembly. The frangible connections allow the position of the repair assembly to be maintained. The frangible connections can be broken, such as by inflation and/or tearing or pulling apart of the components of the repair assembly. Thus, the invention provides a way to mitigate the movement of components of the repair assembly during transport and positioning of the repair assembly.

An apparatus and method is provided for repairing an underground structure such as a pipe or manhole. The apparatus includes a liner assembly made of resin absorbent material. Some embodiments may further include a bladder assembly to help position the liner and press the liner against the walls of the underground structure. A sealing member is positioned in the underground structure. In some embodiments the sealing member is a separate member made from a compressible material, an absorbent material, or a hydrophilic or hydrophobic material. In other embodiments the sealing member is a portion of the liner assembly. The sealing member includes one or more channels adapted to receive a semi-liquid such as a hydrophilic or hydrophobic paste or grout. The semi-liquid is capable of swelling in response to being exposed to another liquid, such as water, and forms a seal between the liner assembly and the host pipe/manhole.

A process and system for applying a liner to an inner surface of a pipeline uses an inversion technique to apply the liner. This involves arranging the liner into everted and non-everted portions and driving the non-everted portion through the pipeline such that it everts and is applied to the inner surface of the pipeline. At least first and second pipeline vehicles are used to drive the non-everted portion of the liner through the pipeline.

An air duct sterilization system, and a device and method for producing the air duct sterilization system. The system includes a plurality of ultraviolet light-emitting diodes (UV LEDs), arranged in a UV LED strip within an air duct, configured to destroy airborne biological contaminants in the air duct. The device includes wheel assemblies and an applicator assembly. During installation of the UV LED strip, the wheel assemblies contact a lower surface and an upper surface of an interior of the air duct, thereby enabling the device to roll along the interior of the air duct. The UV LED strip is applied to the upper surface of the interior of the air duct using the applicator assembly, with minimal effort needed from an individual performing the installation. After installation, the UV LEDs are illuminated as needed to destroy airborne biological contaminants, thereby sterilizing the air duct and air therein.