摘要:
The invention relates to a device intended to be introduced into a pipeline for circulating a fluid and comprising an operational element, a central connecting rod and a plurality of radial lugs, these lugs being linked to the operational element by means of the connecting rod and extending, under the effect of an elastic force, like umbrella spokes, to press against the inside of the pipeline. According to the invention, the lugs are spaced regularly around a same fitting, and the elastic force is at least partly constituted of a turning torque applied to the lugs through support means constituted, for example, by an axial spring pushing a stop washer mounted to slide on the connecting rod.
摘要:
An apparatus for assembling a liner from a plurality of longitudinal sections of flexible material having longitudinal edges adapted to be joined one to another to form the liner includes a path means along which the longitudinal sections of flexible material can be conveyed in a laterally reduced condition, an assembly zone at which the longitudinal edges can be joined together to form the liner, and a guide structure about which the flexible material can turn upon exiting from the path means to provide an inner section and an outer section turned back with respect to the inner section. The guide structure presents a guide, surface over which the longitudinal sections of flexible material can pass, the surface being configured to facilitate spreading of each longitudinal section from the laterally reduced condition.
摘要:
A device for repairing a pipe internally includes a body and a drill assembly mounted on the body. The drill assembly has upper and lower arms, pivotable between a closed position in which the arms occupy a radial area not substantially greater than a diameter of the body and an open position in which the arms bear against substantially opposing points of the pipe wall to stabilize the drill assembly within the pipe. In the preferred embodiment for repairing pipe joints a hydraulic drill head bears against the pipe wall when the arms are in the open position and drills a hole for a sealant nozzle mechanism mounted on the upper arm, which swings into position in front of the drill head to inject a sealant into the pipe joint through the drill hole and seal the joint.
摘要:
A flexible probe for insertion into an auxiliary pipe indicates the proximity of the auxiliary pipe to a device within a main pipe. The probe includes an apparatus for generating a magnetic field for detection within the main pipe. An indicator associated with the probe generates a signal when the probe is adjacent the main pipe. The magnetic field generating apparatus includes a coil with an electronic circuit for generating an alternating current signal and also includes a switch operable when the probe contacts the main pipe.
摘要:
A self-centering suspension for use in supporting a vehicle or vehicles intended to travel in a pipeline includes a body and two sets of three wheels spaced apart along the length of the body. Each wheel is mounted on a lever arm biased by torsion springs against the inner surface of the pipeline. Each lever arm has a stub arm which is eccentrically arranged relatively to a rotary joint in the form of a pin, and the stub arm slidingly engages a circumferential groove in a ring. Each ring slides on the body. A set of three wheels are thus constrained to move inwards and outwards together.
摘要:
A lined tubular assembly and a method and apparatus for lining an elongated tubular article to form the assembly. The lined tubular assembly has a metal tube with a non-metallic liner bonded to the internal surface thereof by a bonding agent. A non-metallic flanged end piece is secured to each end of the metal tube and has a first portion extending into the tube between the liner and the internal surface of the tube and a second portion covering the end surface of the tube. The method for producing the assembly includes introducing simultaneously into the tubular article both a tubular liner and a bonding agent for bonding the liner to the internal surface of the tubular article. The apparatus for producing the assembly includes an elongated liner installation device that simultaneously introduces the liner and bonding agent to the interior of the tubular article.
摘要:
Apparatus for cutting a hole through a plastic liner in a gas or other main comprises a body forming module of a train of modules adapted to travel through the main. The body has a radially movable platform carrying a cutter. The platform has four cams engaging four cams pivotally mounted on tie-bars. Advancing movement of the platform pushes the cams outwardly causing support legs to move outwardly and to cause four slave legs carried by the support legs to engage the plastic liner. Further advancing movement of the platform causes the cutter to engage the liner and also holds the support legs in their advanced position as noses on the cams traverse the faces of the cams.
摘要:
This invention provides a convey apparatus capable of conveying a convey target without locally applying an excessive force to it. The convey apparatus includes a convey portion and a medium pressure switching unit. The convey portion has a plurality of medium passages for passing a medium therethrough, and at least part of the surface of the convey portion is made of an elastic material. The diameters of the medium passages can be freely increased/decreased. The medium pressure switching unit controls the pressures of a medium supplied to the respective medium passages of the convey portion to increase or decrease the diameters of the medium passages, thereby generating a carrier wave on the surface of the convey portion. Therefore, according to this convey apparatus, the pressures of the medium supplied to the respective medium passages of the convey portion are controlled by the medium pressure control unit in order to increase or decrease the diameters of the medium passages, thereby generating a carrier wave on the surface of the convey portion made of the elastic material. In this way, convey targets ranging from a flat convey target to a three-dimensional convey target can be conveyed without locally applying an excessive fore to them.
摘要:
A pipe paver finishing machine is disclosed for applying and finishing concrete lining onto the interior surface of a lower segment portion of a drainage pipe. The machine includes a chassis member adapted for movement longitudinally along the interior of the drainage pipe and a surfacing unit suspended from the chassis member and adapted for a pendulum-type pivotal movement substantially about the center point of drainage pipe to apply and to finish a concrete liner onto the bottom interior surface of the drainage pipe.
摘要:
A device for repairing cast iron pipe joints comprises a head having a motor for actuating a tool and a body, the head being pivotally connected to the body so that it can be pivoted from an axial position to a radial position within the pipe. In a preferred embodiment, the head includes a motor driving a drill bit. A retractable foot is extended to force the head against the pipe wall to be pierced by the drill bit, following which sealant is injected into a hollow drill shaft and flows up the helical grooves of the drill bit into the pipe joint cavity. Preferably a pair of guide wings maintains the device centered in the pipe and raised off of the pipe floor, and the operator monitors progress of the device through a video monitor.