A flexible lance drive device has at least one drive motor in a first portion of a housing and a drive axle projecting across a second portion of the housing carrying a cylindrical spline drive roller. A plurality of cylindrical guide rollers on fixed axles span across the second portion of the housing aligned parallel to the spline drive roller. An endless belt wrapped around the at least one spline drive roller and guide rollers has a generally smooth outer surface and a transverse splined inner surface having splines shaped complementary to splines on the spline drive roller. A bias member supports a plurality of follower rollers each aligned vertically above one of the at least one spline drive roller and guide rollers operable to press each follower roller toward one of rollers to frictionally grip a flexible lance hose when sandwiched between the follower rollers and the endless belt.

A conductor transportation device for cables has a pivoting conductor conveyor. A first drive moves the conductor conveyor about a pivotal axis. The conductor conveyor has a conveyance (30a) such as, a conveyor belt running around a drive roller and a roller, together with a pressure application. A second drive is present for the. The axes of rotation of rollers (30b, c, e, f) for the conveyance and pressure application are parallel to one another and also to the pivotal axis of the conductor conveyor. A drive axis of the drive is coincident with one of the axes of rotation of the rollers. One of the axes of rotation of the rollers is coincident with the pivotal axis for the conductor conveyor. The actuation paths of the pivotal axis and the conveyor roller or the driven roller are spaced apart.

Disclosed are lance hose drive units having a modular construction for easy disassembly and reassembly of its housing and components. A drive unit includes a housing having front and rear walls, and a top cover coupled to the walls. The housing may include a bottom cover removably also coupled to the front and rear walls, and a motor-side cover coupled to a side edge of at least one of the front wall, rear wall, and top cover. A drive unit may also comprise a belt drive unit positioned within the housing, and configured to drive movement of a lance hose positioned within the housing. A belt-side cover is removably coupled to the top cover, at least one toolless fastener removably securing the belt-side cover. The belt drive unit is slidably coupled at its front end within an interior front channel and at its rear end within an interior rear channel.

An apparatus for driving a flexible lance hose into and out of tubes in a heat exchanger tube sheet includes a housing and an upper endless belt drive assembly and a lower endless belt drive assembly spaced apart by a gap for receiving a flexible lance hose therein. One of the drive assemblies is fixed to the housing. The other drive assembly is movable within the housing toward and away from the one endless belt drive assembly. The apparatus further includes a drive motor fastened to the housing configured to engage at least one of the upper and lower endless belts and drive a flexible lance hose disposed in the gap.