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8/7/2019 Partes de Compuerta

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Rodney HuntAGAIndustriesCompany

Sluic e Gat es


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PIPE COVER

FLOORSTAND

OPERATING STEM

STEM COUPLING

STEM GUIDE

GATE GUIDE

TOP WEDGE

SIDE WEDGE

THRUST NUT

DISC

BOTTOM WEDGE

ANCHOR BOLT

WALL THIMBLE

FRAME

OPENING

INVERT


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The Typ ic a l

Slu ic e Gat e Ins t a l la t ion

The diagrams at left illustrate a typical sluice gate installation,showing a sluice gate with a wall thimble and crank operatedfloorstand. The more common component variations includehandwheel actuators, benchstands, electric motor drivenfloorstands, hydraulic cylinders, self-contained gates and HY-Qflushbottom closure sluice gates. Other component arrangementsare illustrated and described on pages 16 through 18.

In its simplest form, a sluice gate assembly consists of a frame,guides and a disc or sliding member. The gate is normallyconstructed of cast iron with bronze seats. Bronze wedges holdthe disc tightly to the frame in the closed position.

Use of a wall thimble is the recommended method of mounting thegate because it provides a rigid, machined mounting surface.

Sluice gates can also be mounted on flanged pipe or directly toconcrete walls with anchor bolts.

The crank operated floorstand has a geared head with rollerbearings to support the opening and closing thrust loads. Thehead is enclosed and mounted on a pedestal secured to aconcrete floor or structural support. Although the crank operatedfloorstand is the most common method of controlling a gate,handwheel actuators, motor driven actuators and hydrauliccylinders can also be used.

The operating stem is a round shaft of bronze or stainless steelthreaded on its upper portion to engage the floorstand lift nut.Sections of stem are joined together with cast bronze threadedand keyed couplings. When the length of an operating stemrequires intermediate support an adjustable bronze bushed stemguide is furnished.

SLUICE GATE ASSEMBLY

WALL THIMBLE

CRANK OPERATED FLOORSTAND

OPERATING STEM

A typical sluice gate installation demonstrates how the various components of a sluicegate assembly are put together.


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UNIVERSAL FRAME

SEAT

FACING

GUIDE

NUT

POCKET

TOP

WEDGE

SIDE

WEDGE

DISC

TOP

WEDGE

GUIDE


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KEYED

WEDGE PAD

SEAT

FACING

NUT

POCKET

SIDE

WEDGE

DISC

TOP

WEDGE

KEYED

WEDGE PAD

WEDGE PAD

BOLT

WEDGE PAD

BOLT

WEDGE PAD

KEYED TO GUIDE

ONE-PIECE

GUIDE AND FRAME

The Int eg a l Frame Sluice Gat eFor Openings over 60 a nd Smal ler

r


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The Wedge Syst em

SIDE WEDGES

TOP AND BOTTOM WEDGES

Side wedges are keyed directly to the sluice gate disc to prevent rotatio

Because the wedge and its contact surfaces are machined to match texact angle of the bronze wedge seat, misalignment of the wedge is npossible, even through faulty field adjustment. After the wedge has beproperly set using the adjusting bolt, a lock nut and hold-down stud aused as a double-lock feature to insure permanent setting. The accuraof this wedge system results in low unit pressures uniformly distributeover bearing surfaces.

Both top and bottom wedges make use of a bronze wedge hook anwedge loop or seat. Top and bottom wedge seats are bolted directly to thcast iron frame and keyed so that they will not move under force. Twedge hooks are provided with an adjusting bolt with a lock nut to maintathe proper setting.

Adjustable wedges of high tensile strength cast bronze are furnished onall Rodney Hunt sluice gates. The number and location of wedges used

on any gate depends on gate size and the amount and direction of waterpressure acting on the sluice gate.

A gate subject to a seating head (a pressure which forces the disc andframe 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 topand side wedges because it makes use of a resilient seal rather thanbronze seats at the invert. Gates in widths 24" and under, subject tounseating heads, are usually supplied only with side wedges because ofthe support inherent in the short span of the disc.

SIDE WEDGES TOP BOTTOMWEDGE WEDGE

B

C

D

EF

G

A

B

C

D

E

F

G

BD

E

G

LEGEND: A . BRONZE B. BRONZE C. BRONZE ADJUSTING SCREW D. HOLD DOWN E. BRONZE F. GATE G. GATE

WEDGE WEDGE SEAT WITH LOCK NUT BOLT SEAT FACING DISC FRAME


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The Self-Cont ained Sluic e Gat e

The selfcontained gate differs from other gates in that it absorbs theoperating load created during opening and closing. This isaccomplished through the use of a yoke, a supporting membermounted on the top of the extended guides. The thrust required tooperate the gate is transmitted by the yoke and guides directly to thegate. In the conventional gate installation the load is absorbed by thefloor or structure above the gate.

Self-contained gates can be furnished with non-rising stems where there inadequate clearance above the gate for a rising stem. Because the nonrising stem may be in the medium, it cannot be cleaned and lubricated anexcessive wear of the thrust nut may result. For that reason, non-risinstems should be used only when there is no alternative.

A self-contained gate has the same general features as a conventional gate.Its cast iron frame, disc and guides are identical except that the guides areextended to provide clearance for the sliding member in the open position. Acast iron or structural steel yoke is mounted on machined pads at the top ofthe guides. Opening thrusts are transferred through the yoke and guides tothe gate. This arrangement eliminates the transmission of operating loads tothe floor above.

All Rodney Hunt sluice gates are available as self-contained gatewith yokes and with rising or non-rising stems. The self-containegate is useful where space above the gate installation, or thabsence of structural supports, limits the use of a separate operatinfloorstand or benchstand.


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The HY-Q Sluic e Gat e

A 78" x 96" FlushBottom Closure Sluice Gate is used to apportion raw sewagflow into grit chambers at the sewage treatment plant in Minneapolis, St. Paul.

As shown in the diagram, bottom disc construction and thickness of theresilient seal create a wide sealing surface against the machined cast iron stopbar. Also note that an effective seal is created by the vertical face of the sealdesignated "A", compressing against the seat facing along the sides of theframe.

The flushbottom closure of the HY-Q gate eliminates the need forvertical walls or pockets on the invert surface which might otherwiseimpede flow. Its distinguishing design feature is a heavy resilient stripattached to the bottom of the gate disc which makes an extremelyeffective invert seal when compressed against the machined cast ironstop bar attached to the gate frame.

Because the HY-Q seal has a wide sealing surface rather than anarrow, line-contact surface common in other designs, unit pressuresare much lower. Consequently, the possibility of seal damage fromtrapped debris lying between the invert and the gate disc is greatlyreduced. Use for over thirty-five years since its development hasproven that the HY-Q seal will withstand thousands of openings andclosings without permanent deformation. If it becomes necessary, the

seal can be changed without disturbing the invert or shutting off the flowof water.

Compressed resilient seal is clearly visible between the gate disc and stop bar. Theflush line of the invert is indicated by the white line

RESILIENT

SEAL

STOP BAR

A INVERT


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Here s w hen you c an use

t he Rodney Hunt HY-Q

Slu ic e Gat e t o

exc ept iona l advantage.

WHEN SILT AN D DEBRIS

NT ERFERE WITH OPERATION

WHEN MAX IMUM FLOW IS REQUIRED

WHEN COMPLETE DRAINAGE IS A MUST

WHEN DEFLECTION ON WI DE GATES IS A PROBLEM

Silt and debris are often a problem in conventional sluice gate installations. Foreignmaterial may collect on the side of the concrete lift or in the boxout. Either of which isrequired when the gate invert is near or at the chamber floor. The HY-Q design allowscontinual flushing to prevent the accumulation of debris and silt.

The concrete lift or boxout beneath the gate creates a flow-restricting turbulence. Theunobstructed invert surface available with the HY-Q gate has a high coefficient ofdischarge resulting in maximum flow through the opening for any given head condition.

The HY-Q sluice gate provides a natural drainage because the invert of the gate and thenvert of the channel are at the same elevation.

Ail sluice gates deflect under load. Conventional design requires a heavy bottom rib tominimize bottom seat facing interference for seating head applications, and to insureproper wedge engagement and gate closure for unseating heads. As gate widths increase,this design problem becomes more severe. However, the HY-Q sluice gate eliminates this

deflection problem because the invert is sealed by the contact of the resilient seal againstthe stop bar.


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Spec ial Rodney Hunt

Design Feat ures

A wedge system that stays put. Because a Rodney Hunt bronze wedge is keyeddirectly to the sluice gate disc, it can't rotate. The wedge is machined to match theexact angle of the bronze wedge seat and double locked with a stud, adjusting screwand lack nut. This provides positive, fine wedge adjustment with permanent locking.

Locked in position gate guides and wedge seats. On RodneyHunt universal frame sluice gates the guides are bolted to theframe and dowels are used to lock the guide in place.

On the integral frame gate, wedge seats are bolted and keyed tothe frame to lock them in place. In this way, both horizontal and

vertical movement is eliminated.


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Ins t a l la t ion o f Slu ic e Gates

WALL T HIMB LES

They provide a smooth, machined surface on which to mount the gategreatly reducing the possibility of gate distortion.

Correctly installed, a wall thimble assures that the sluice gate will be plumin both directions.Attaching stud locations are fixed by the gate manufacturer. Wall thimbleand gate are drilled to the same dimensions.The wall thimble eliminates the need for shimming and grouting, reducinggate installation costs and making the installation easier.Gates can be removed and installed again without disturbing theconcrete.

Rodney Hunt sluice gates can be attached to wall thimbles embedded inthe concrete, pipe flanges or directly to the concrete wall, and held in

place with anchor bolts embedded in the concrete. However, the wallthimble is most frequently used and is the recommended method ofinstallation. Here are some of the advantages of the use of wall thimbles:

They can be easily positioned in forms before the concrete is poured.

No additional form work is required for the opening when the length of thewall thimble is equal to the wall thickness.

These square and circular wallthimbles are typical of thoseshipped by Rodney Hunt everyday. Note the use of plastic capplugs to keep concrete out of thebolt holes during installation.


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Wall Thim bles

ANCHOR BOLTS A typical installation of a HY-Qsluice gate with anchor bolts. Notethe use of 1" of grout between theflange of the gate and the concretewall. This is to prevent mounting thegate directly to the concrete surfacewhich 'may not be flat.

Rodney Hunt offers three types of wall thimbles as standard equipment. They are the "F", "E" and"Flange and Bell". Variations such as the "L" and "C" section thimbles are also available. All wallthimbles are supplied with rectangular or circular openings that conform to the clear opening of thegate. Mounting flanges are rectangular to match the sluice gate frame. The mounting flange isslightly larger than the gate frame to prevent interference with the concrete adjacent to the thimble.The common wall thimble depths are 8", 12", and 24", and are usually furnished in depthscorresponding to wall thickness.

Type "E" section wall thimbles irerecommended for sluice gates subject tohigh unseating pressures and very largegates. The "E" section thimble providesmaximum strength and rigidity far eves thelargest sluice gate installations and themast severe conditions.

Flange and mechanical joint bell thimbletake the spigot end of a standard castiron or cash ductile iron pipe.

Sluice gates can also be mounted on hook typeanchor bolts that have been embedded in theconcrete structure.

Type F wall thimble is the most widelyused. The F section design is suitable formounting sluice gates subject to anyseating or moderate unseating pressure.


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Ins t a l la t ion Var ia t ions

This diagram shows a side wedge sluice gate with a two-piece operating stem andcrank operated, single-speed floorstand. The gate is installed on an "F" section wallthimble extending completely through the concrete wall. This makes installation

easier. Also note that a grout pad is used under the hoist to insure the properalignment between hoist and operating stem.


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This 16" diameter gate, mounted on a flangedpipe extending from the wall, is a flange frame,side wedge, self-contained sluice gate using anon-rising stem. A T-handle wrench, engaginga 2" square operating nut in the floor-box isused to raise and lower the gate. Non-risingstem gates should not be used when it can beavoided, because the stem threads are in themedium where they cannot be regularlycleaned and lubricated.

This is a Rodney Hunt sluice gate with flush-bottom closure and side and top wedges. It ismounted on a type "F" wall thimble, the mostwidely used. Note that the hand-wheel

operated floor-stand is mounted on amachined wall bracket. In this situation, a groutpad under the floor-stand is not necessary fortrue alignment.


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This is a Rodney Hunt side wedge sluice gatearranged for inverted operation. An inverted gate

is used when there is not enough clearance fornormal rising stem operation, or when weir typeoperation is desired. The gate is lowered to open,and raised to close, with an offset handwheeloperated floor-stand installed on concrete withanchor bolts. The offset floor-stand eliminates theneed for a special concrete support or wallbracket.

When limited head-room or insufficient clearanceabove the gate restricts the height of the gate. Anextra wide sluice gate may be necessary. Thisflush-bottom sluice gate with side and top wedgesis arranged for twin stem operation with twointerconnected, two-speed, manually operatedfloor-stands. This arrangement can also besupplied with electric motor operation, providingtorque protection and geared limit switches.

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