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US 4,842,130 AGranted
Belt bender
AssigneeD M Enterprises Inc.
InventorDennis Mraz
Life of this patent
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AssigneeD M Enterprises Inc.
InventorDennis Mraz
Estimating the term…
A belt guidance arrangement for use in a belt conveyor system, such as used in mining operations, includes in one embodiment at least one pair of rollers supported by interconnected frames in vertically spaced substantially horizontal relation so as to enable selective angling between the rollers. An endless conveyor belt is wrapped about the rollers so as to define a reach between the rollers which is twisted generally about a longitudinal twist axis and is subjected to transverse components of tension forces acting on opposite sides of the twist axis upon angled positioning between the rollers. Various embodiments enable the rollers of one or more pairs of rollers to be positioned so that the geometrical relation between the belt engaging peripheral surfaces of the rollers of each pair in the longitudinal direction of belt movement effects balancing of the sum of transverse components of tension forces acting on opposite sides of the longitudinal twist axis of the belt to thereby effect desired training of the belt through the roller pairs. The rollers are preferably formed with profiled configurations which substantially equalize the path lengths of the corresponding longitudinal elements of the belt on opposite sides of the twist axis so as to effect a predetermined differential in the path lengths of the longitudinal belt elements and thereby achieve desired tensile stress distribution in the belt.
For use in a conveyor system such as employed in mining operations, a belt guidance arrangement comprising at least one pair of vertically spaced rollers, one of said rollers being mounted on a first frame and the other roller being mounted on a second frame swingable horizontally relative to said first frame, an endless belt wrapped about said pair of rollers so as to define a reach between said rollers which undergoes twisting generally about a longitudinal twist axis and is thereby subjected to transverse components of tension forces acting on opposite sides of said longitudinal twist axis upon horizontal swinging movement of said second frame relative to said first frame, means for mounting each of said rollers to be adjustable longitudinally of the direction of movement of the belt so as to balance the sum of the transverse components of tension forces acting on opposite sides of said longitudinal twist axis and thereby maintain stable training of the belt about said rollers.
For use in a conveyor system such as employed in mining operations, a belt guidance arrangement comprising at least one pair of vertically spaced rollers, one of said rollers being mounted on a first frame and the other roller being mounted on a second frame swingable horizontally relative to said first frame, an endless belt wrapped about said pair of rollers so as to define a reach between said rollers which undergoes twisting generally about a longitudinal twist axis and is thereby subjected to transverse components of tension forces acting on opposite sides of said longitudinal twist axis upon horizontal swinging movement of said second frame relative to said first frame, means for mounting at least one of said rollers for movement longitudinally of the direction of movement of the belt so as to balance the sum of the transverse components of tension forces acting on opposite sides of said twist axis and thereby maintain stable training of the belt about said rollers, each of said rollers being convex in configuration and having a maximum diameter to minimum diameter ratio of about 3:1 and a length to maximum diameter ratio of about 5:1.
A belt guidance arrangement comprising, in combination, at least one pair of rollers, first and second interconnected frames supporting said rollers in vertically spaced substantially horizontal relation so as to enable said rollers to be swingably substantially horizontally relative to each other, an elongated conveyor belt having individual longitudinal elements and defining an ingoing run to one of said rollers and an outgoing run from the other of said rollers, said belt being wrapped about said rollers so as to define a reach therebetween which is twisted generally about a longitudinal twist axis and is thereby subjected to transverse components of tension forces acting on opposite sides of said longitudinal twist axis when said belt is turned through an angle by relative swinging movement between said rollers, means mounting said rollers for movement relative to their respective frames in the longitudinal direction of movement of the belt such that the geometrical relation between the belt engaging peripheral surfaces of said rollers effects balancing of the sum of the transverse components of tension forces acting on opposite sides of said longitudinal twist axis of said belt, said belt engaging peripheral surfaces of said rollers defining profiled configurations which substantially equalize the path lengths of said individual longitudinal elements in the belt between contact with and release from said rollers on one side of said twist axis with the corresponding longitudinal belt elements on the opposite side of said twist axis and effect a predetermined differential in said path lengths from the longest to the shortest longitudinal elements of the belt so as to effect a desired tensile stress distribution in the belt.
A conveyor belt guidance arrangement comprising, in combination, at least one pair of rollers, first and second interconnected frames supporting said rollers in vertically spaced relation and enabling said rollers to be swingable substantially horizontally relative to each other, an elongated conveyor belt defining an ingoing conveying run to one of said rollers and an outgoing conveying run from the other of said rollers and being wrapped about said rollers so as to define a reach therebetween which is twisted generally about a longitudinal twist axis and is thereby subjected to transverse components of tension forces acting on opposite sides of said longitudinal twist axis when said belt is turned through an angle by relative angular movement between said rollers, means for mounting at least one of said rollers for adjustment relative to its respective frame in substantially the longitudinal direction of movement of the belt such that the geometrical relation between the belt engaging peripheral surfaces of said rollers effects balancing of the sum of transverse components of tension forces acting on opposite sides of said longitudinal twist axis of said belt and thereby effects training of the belt through the roller pair.
A method of maintaining predetermined training of an elongated belt over a pair of substantially horizontally disposed rollers in a belt angle station, said method comprising the steps of;
For use in a conveyor system such as employed in mining operations, a belt guidance arrangement comprising at least one pair of vertically spaced rollers, one of said rollers being mounted on a first frame and the other roller being mounted on a second frame swingable horizontally relative to said first frame, an endless belt wrapped about said pair of rollers so as to define a reach between said rollers which undergoes twisting generally about a longitudinal twist axis and is thereby subjected to transverse components of tension forces acting on opposite sides of said longitudinal twist axis upon horizontal swinging movement of said second frame relative to said first frame, means for detecting transverse movement of said belt from a generally centered position on said rollers, and means for effecting movement of at least one of said rollers longitudinally of the direction of belt movement so as to balance the sum of the transverse components of tension forces acting on opposite sides of said longitudinal twist axis and thereby maintain stable training of the belt about said rollers in response to detecting predetermined transverse movement of said belt.
A method of controlling tensile stress distribution in an elongated run of conveyor belt through a belt guidance arrangement which includes at least one pair of rollers having belt engaging peripheral surfaces of circular transverse cross section, said method comprising the steps of;
Dependencies are inferred from the claim text.