A pipe-forming apparatus with which a spiral pipe can be formed using a simple configuration without an inner periphery restriction body. A driving part (10) of a pipe-forming apparatus (3) presses a following strip portion (92) toward a pipe end portion (91e) of a preceding spiral pipe portion (91) obliquely with respect to a machine-height direction HD. A pipe end guide is constrained in a machine-width direction WD with respect to the pipe end portion, and slidably engaged in a propelling longitudinal direction LD. A pressing force for the following strip portion provides a fitting force between the following strip portion and the pipe end portion, and a propelling force for forward propulsion. A pipe is formed in a state where a part other than a partial part at which the pipe-forming apparatus is provided in a circumferential direction of the pipe end portion is released from the pipe-forming apparatus.

A method of installing a liner assembly for pipeline repair or reinforcement includes: pulling a prepared liner assembly into position in the pipeline, the liner assembly including a tubular liner wetted with a curable compound; introducing fluid into the inflatable bladder to bring the tubular liner into firm contact with an interior surface of the pipeline; flowing the fluid continuously through the bladder and discharging the fluid into the pipeline, while maintaining the liner assembly in an inflated condition; measuring a flow rate and a temperature of the fluid entering the bladder; calculating a time period sufficient for the tubular liner to cure based on: an amount of heat required for curing, based on dimensional information of the liner, and the measured flow rate and temperature of the fluid; and maintaining the liner assembly in an inflated condition for the time period sufficient for the tubular liner to cure.

A trenchless rehabilitation device for disconnects on large-diameter concrete drainage pipe and method thereof is provided; which includes: a pipe CCTV, a water blocking device, a lining repairing permanent structure, and a grouting device. The pipe CCTV is configured to determine the location of the pipe disconnection; the water blocking device is configured to form the working space; then the rubber seal lining short tube and multiple expanded round fixed steel plates are configured to form the inner repair permanent structure, and the grouting equipment is configured to insert the expanded round fixed steel plates. The grouting holes are configured to polymer grouting on the periphery of the pipe disconnection and the soil void. The trenchless repair process provided by the present invention can form a composite pipeline disjointed repair structure of inner repair permanent structure and polymer grouting material.

An expander, preferably for use in expanding a host pipe to be refurbished. A floating pad is disposed to be displaced relative to a chassis by at least one retractable and extendable piston such that the expander has a first expansion range between fully-retracted and fully-extended states. A floating pad jacket and a chassis jacket are disposed to be removably attached to the floating pad and chassis, such that the floating pad jacket increases the first expansion range of the expander to a second expansion range when the floating pad jacket is attached to the floating pad, and the chassis jacket increases the first expansion range of the expander to a third expansion range when the chassis jacket is attached to the chassis. At least one piston may be configured to be extended and retracted independently.

A remotely controllable pipe rehabilitation device having a base, a water opening, a dry pipe rehabilitation material opening, a first pipe rotatably attached to the base and coupled to the dry pipe rehabilitation material opening, a motor, a drive member coupled to the motor and the first pipe, a rotatable delivery pipe located adjacent to a first portion of the base and coupled to the first pipe and having a nozzle, a water with a water outlet to rotate with the nozzle, a first hose from the first water opening to the second water opening, a second hose from the water outlet to the nozzle, and a remote control disposed remotely from the area to be rehabilitated, the remote control to allow a user to operably maneuver the motor into a desired lateral orientation.

The present invention relates to an apparatus for rehabilitating damaged pipe walls in the region of the connection of a secondary pipe to a main pipe, comprising a mobile carrier element, wherein a covering element and an expandable expansion body are arranged on the carrier element, and wherein the expandable expansion body when not expanded is positioned or is positionable at least in sections in a or by means of a first recess in the covering element in the secondary pipe and, when expanded, lies against the wall of the secondary pipe such that the covering element and the expansion body together form a shuttering, and wherein the covering element has a second recess through which a viscous, curable rehabilitation compound can be introduced by means of a transport means from a storage device into the space between the shuttering and the walls of the main and secondary pipes adjacent to the shuttering, wherein the rehabilitation compound comprises two components in the form of a resin and a hardening agent or consists thereof and cures by means of polyaddition, polycondensation and/or polymerization, wherein resin and hardening agent are stored separately in the storage device, and wherein a mixing nozzle is included which is arranged upstream and/or downstream of the transport means, wherein the mixing nozzle is designed and configured in order to mix resin and hardening agent in a predetermined mixing ratio after removal from the storage device and before introduction into the space between the shuttering and the walls of the main and secondary pipes adjacent to the shuttering.

The present invention relates to an apparatus for rehabilitating damaged pipe walls in the region of the connection of a secondary pipe to a main pipe, comprising a mobile carrier element, wherein a covering element and an expandable expansion body are arranged on the carrier element, and wherein the expandable expansion body when not expanded is positioned or is positionable at least in sections in a or by means of a first recess in the covering element in the secondary pipe and, when expanded, lies against the wall of the secondary pipe such that the covering element and the expansion body together form a shuttering, and wherein the covering element has a second recess through which a viscous, curable rehabilitation compound can be introduced by means of a transport means from a storage device into the space between the shuttering and the walls of the main and secondary pipes adjacent to the shuttering, wherein the apparatus comprises a heating device which is integrated in the covering element, in the storage device and/or in the transport means at least in the region of the second recess and/or is operatively connected to the covering element, to the storage device and/or to the transport means at least in the region of the second recess.

A method of installing a liner assembly for pipeline repair or reinforcement includes: pulling a prepared liner assembly into position in the pipeline, the liner assembly including an outer tubular liner and an inner inflatable bladder positioned longitudinally within the tubular liner, the tubular liner being wetted with a curable compound; introducing fluid into the inflatable bladder so that the inflatable bladder expands to bring the tubular liner into firm contact with an interior surface of the pipeline; flowing the fluid continuously through the bladder and discharging the fluid into the pipeline, while maintaining the liner assembly in an inflated condition for a time period sufficient for the tubular liner to cure; and deflating the inflatable bladder and retrieving at least a portion of the liner assembly from the pipeline.

The present invention relates to a pig for use in a system for lining ducts such as water or sewage pipes or electrical ducts or gas pipes. The pig is insertable at least partly within a fabric liner sleeve located in a duct such as a water or sewage pipe and is capable of heating the liner sleeve in situ in the duct to melt or soften thermoplastic material of the liner sleeve to subsequently form, on cooling of the melted thermoplastic material, a rigid liner in the duct. A pig for fitting a liner to the inside of a pipe, comprising a pig body defining a longitudinal axis in a longitudinal direction from a front portion to a rear portion; a gas supply port in the front portion; a gas outlet diffuser forming part of the rear portion; a heating chamber in the pig body forming a flow path from the fluid inlet to the outlet diffuser; and a heater within the heating chamber, wherein the outlet diffuser comprises a plurality of channels, each channel comprising an inlet facing the front portion in the longitudinal direction and an outlet extending radially outwardly from the longitudinal axis.

It is possible to prevent a tip portion of a guide portion in a spiral pipe-forming apparatus allowing an inner periphery restriction body to be omitted from colliding a peripheral surface portion of a non-circular existing pipe. A non-circular guide portion (73) is provided so as to be rotatable with respect to an apparatus frame (3a) around a rotary axis (32). The guide portion (73) is applied to a peripheral surface of a preceding spiral pipe portion (91). An acting portion (41) acts such that the guide portion (73) follows the peripheral surface of the existing pipe (1).