Portable Drive-Over Conveyor for Unloading Trucks

摘要

A drive-over conveyor for unloading fracing sand is designed to be towed as a highway semi-trailer includes a center frame structure containing a conveyor belt with two pivotal ramps on each side to be moved to a raised positon standing upwardly and a lowered position extending outwardly. The ramps have sufficient length and the center structure has a low height to allow a highway semi-trailer to pass over a grate in the center structure. A platform is attached at the forward end with a king pin on the underside for engaging a towing platform of a highway tractor. A wheel and axle assembly including suspension of the axle for highway travel is mounted on a sub-frame pivotal relative to main rear frame for movement relative to the center frame structure from a lowered road position to a raised position allowing the center frame structure to rest on the ground.

主权项

1. A portable drive-over conveyor for unloading particulate material from trucks comprising:
a center frame structure having a forward end, a rearward end and first and second sides; a first ramp assembly mounted on the first side for pivotal movement about an axis longitudinal of the first side from a raised positon standing upwardly from the first side to a lowered position extending outwardly from the first side to define a ramp allowing a truck wheel to move from the ground onto the center frame structure; a second ramp assembly mounted on the second side for pivotal movement about an axis longitudinal of the second side from a raised positon standing upwardly from the second side to a lowered position extending outwardly from the second side to define a ramp allowing a truck wheel to move from the ground onto the center frame structure; a conveyor arranged along the center frame structure and arranged to transport the particulate material longitudinally along the center frame structure to a discharge at one end of the center frame structure; the ramp assemblies and the center frame structure providing upper surfaces for supporting the truck as it passes from the first ramp assembly over the center frame structure and onto the second ramp assembly; the upper surface of the center frame structure having a grate for passage of the particulate material discharged thereon through the upper surface to the conveyor belt; a frame component attached to the center frame structure at the forward end so as to extend forwardly therefrom and including a king pin depending from an underside of the frame component for engaging a towing platform of a highway tractor; and a wheel and axle assembly attached to the center frame structure at the rearward end so as to extend rearwardly therefrom; the wheel and axle assembly being mounted for movement relative to the center frame structure from a lowered road position to a raised position allowing the center frame structure to rest on the ground; the wheel and axle assembly including suspension of an axle of the wheel and axle assembly arranged for highway travel.