A uC Gi o Aep Is m ns a d t r n y
STEM GUIDE ANCHOR BOLT
GATE GUIDE TOP WEDGE WALL THIMBLE SIDE WEDGE FRAME THRUST NUT OPENING DISC INVERT BOTTOM WEDGE
The Typical Sluice Gate Installation
The diagrams at left illustrate a typical sluice gate installation, showing a sluice gate with a wallthimble and crank operated floorstand. The more common component variations include handwheel actuators, benchstands, electric motor driven floorstands, hydraulic cylinders, self-contained gates and HY-Q flushbottom closure sluice gates. Other component arrangements are illustrated and described on pages 16 through 18.
SLUICE GATE ASSEMBLY
In its simplest form, a sluice gate assembly consistsof a frame, guides and a disc or sliding member. The gate is normally constructed of cast iron with bronze seats. Bronze wedges hold the disc tightly to the frame in the closed position.
Use of a wall thimble is the recommended method of mounting the gate because it provides a rigid, machined mounting surface. Sluice gates can also be mounted on flanged pipe or directly toconcrete walls with anchor bolts.
CRANK OPERATED FLOORSTAND
The crank operated floorstand has a geared head with roller bearings to support the opening and closing thrust loads. The head is enclosed and mounted on a pedestal secured to a concrete floor or structural support. Although the crank operated floorstand is the most common method of controlling a gate, handwheel actuators, motor drivenactuators and hydraulic cylinders can also be used.
The operating stem is a round shaft of bronze or stainless steel threaded on its upper portion to engage the floorstand lift nut. Sections of stem are joined together with cast bronze threaded and keyed couplings. When the length of an operating stem requires intermediate support an adjustable bronze bushed stem guide is furnished.A typical sluice gate installation demonstrates how the various components of a sluice gate assembly are put together.
NUT POCKET GUIDE
DISC SIDE WEDGE
The Integral Frame Sluice Gate
For Openings over 60” and Smaller
KEYED WEDGE PAD
ONE-PIECE GUIDE AND FRAME
WEDGE PAD BOLT
NUT POCKET KEYEDWEDGE PAD DISC SIDE WEDGE WEDGE PAD KEYED TO GUIDE WEDGE PAD BOLT
The Wedge System
Adjustable wedges of high tensile strength cast bronze are furnished on all Rodney Hunt sluice gates. The number and location of wedges used on any gate depends on gate size and the amount and direction of water pressure acting on the sluice gate. A gate subject to a seating head (a pressure which forces thedisc and frame seats together) needs only side wedges to assure proper closure. Unseating heads, on the other hand, force the disc and frame seats apart, making additional wedges on top and bottom necessary. There are exceptions. The HY-Q gate for unseating heads needs only top and side wedges because it makes use of a resilient seal rather than bronze seats at the invert. Gates in widths 24" andunder, subject to unseating heads, are usually supplied only with side wedges because of the support inherent in the short span of the disc.
Side wedges are keyed directly to the sluice gate disc to prevent rotation. Because the wedge and its contact surfaces are machined to match the exact angle of the bronze wedge seat, misalignment of the wedge is not possible, even throughfaulty field adjustment. After the wedge has been properly set using the adjusting bolt, a lock nut and hold-down stud are used as a double-lock feature to insure permanent setting. The accuracy of this wedge system results in low unit pressures uniformly distributed over bearing surfaces.
TOP AND BOTTOM WEDGES
Both top and bottom wedges make use of a bronze wedge hook and wedge loop or seat....
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