Presentation on theme: "ONE DAY WORKSHOP ON DAM’S GATES"— Presentation transcript:
1 ONE DAY WORKSHOP ON DAM’S GATES ORGANIZED BYNARMADA, WATER RESOURCES, WATER SUPPLY & KALPSAR DEPARTMENTGANDHINAGARSUPPORTED BYWALMI -ANANAD
2 Sub:- MAINTENANCE OF GATES Retd. Deputy Executive Engineer (Mech.) PAPER BY:- ER. S.K.SUTHARRetd. Deputy Executive Engineer (Mech.)3/25/2017
3 MAINTENANCE OF GATESThe gates might have been well designed and sturdy and timely inspected but if the follow up action is not taken, the gate will not run smoothly. Hence periodical maintenance should be done with in prescribed timing..
4 STEPS FOR MAINTENANCELUBRICATIONWIRE ROPESPAINTING
5 PARTS OF VERTICAL GATE SKIN PLATE T-VERTICALS HORIZONTAL GIRDER STIFFNERSBRACINGHORIZONTAL GIRDER
6 PARTS OF VERTICAL GATE T- VERTICAL HORIZONTAL GIRDER BRACING
7 LUBRICATIONVarious parts of Gate are required to be lubricated by using proper Grade of lubrication.Lubrication schedule has been given in the Table .Approximate quantity of lubricant shall be kept ready which may vary as the number of gates. However the required quantity can be ascertained by experience.
8 LUBRICATIONIn the Table, the lubricants grade mentioned are of INDIAN OIL CORPORATION. However equivalent grade of any Reputed make may be utilised.
9 TABLE Sr No Parts to be Lubricated Lubrication Recommended APPROXIMATE QUNTITYSCHEDULEREMARKS1TrunnionpinServo Coat 120As requiredQuarterly 1Kg.May, AugustNovPin should be lubricated till grease squeezes out from sides.2Wire RopesCardiumCompound35 KgMayWhen ropes are dry3Guide rollersServo coat-1401 KgSix MonthlyMay, Nov.4Turn buckleServo Coat-120Prior to Monsoon
10 TABLE 5 Bushing in rope drum &all Bearings Servogum-2 5 Kgs Prior to Monsoon6Drum gear,Intermediate gearPinions,Servogum-140Quarterly(May,Aug,Nov,Feb)7Reduction unit25 mlYearly (May)8Electrical MotorBearingSmall QuantityChange after every 2000 Hrs9Electro Magnetic brake rings &Pins10Sprocket Wheel &chain
11 APPLICATION OF LUBRICANTS The wire ropes should be cleaned and dried and a jet of air or wire brush is used prior to application of lubricantsThe brush is dipped into the Lubricants to be applied.It may also be applied by hand with leather gloves especially when a heavy, on flowing lubricants is applied.Lubricants should be slightly heated to get a smoother and better application.
15 WIRE ROPES1. Shifting the wire ropes at point of clamping position on Drums and cutting its end.2. Lubrication of wire ropes.3. Maintenance of wire ropes can be carried out As per I.S However some of details given in next slide.
16 WIRE ROPESLubrication shall be free from harmful substances such as acids &alkalis.It should be light grade that may penetrate between the wires &strands of the ropes before being wiped off or absorbed by surface dirt.Cardium Compound is used as during manufacturing of wire ropes are fully lubricated including fibre core &layers to reduce internal abrasion to exclude moisture and delay corrosion.In service the initial lubricant will tend to dry out and therefore it is desirable to lubricate all ropes at regular interval
21 TOP VIEW OF SIDE SEAL WIRE ROPE WALL PLATE SKIN PLATE TOP PLATE Z TYPE RUBBER SEAL
22 PAINTING NEED FOR PAINTING A. Iron and steel structure exposed to sun, rains and air are deteriorated due to corrosion effect.Once corrosion set in, it goes on continuously eating metal.Only 1.6 to2.0 mm corrosion allowance is provided in design of gates. Therefore it should be regularly painted on Upstream and Downstream sides as indicated in Table
23 TABLE SR NO MANE OF GATES PART TO BE PAINTED PAINTS REOMMENDED FREQUENCY1Gate leaf-UPSTEAM SIDEAnticorrosive black H.D. of renowned makeTwo coats/three coats once in a year or as required.2Gate leaf-Downstream side &all Other parts except Hoist covers and the barsAnticorrosive black L.D. of renowned makeSingle coat /two coats once in a year or once in two years depending upon the condition.3Hoist coversPrimary coat-Red OxideFinal coat-Blue enamel or dowel deep orange.Once in a year.4Railing pipesPrimary coat-Red oxideFinal coat- Aluminum oxideOnce in a year5Final coat- Aluminum oxide
24 NOTEPainting should be done by adopting proper painting procedure prior to which scraping, chipping etc.should be done and vegetation developed should be removed.Brass plates and rubber seal should not be paintThe paints to be used depend on site situation i.e. whether water is to acidic or basic, Dams located near to sea.etc.Painting should be carried out after drying of first coat and before applying paint, it should be perfectly cleaned &free from moisture,dust.etc,
30 PARTS OF VERTICAL GATE T- VERTICAL HORIZONTAL GIRDER BRACING
31 ELECTRICAL PARTS Electrical cables should be checked for puncture. Cable clamps and lugs should be checked, tightened or replaced, if found faulty.Contacts of main switch should be checked.Overload relay may be checked and tested and put in operational condition.Check wiring, contacts of starter and tighten as required. Burnt or worn out may be replaced.
33 ELECTRICAL PARTSCheck the operation of Electromagnetic brake and clean periodically the plunger and barrel as deposition of dust or dirt will make chattering noise and hammering.Adjust brake shoes depending upon wear and tear of shoes.If magnetic coil is found burnt then it should be replaced.
34 CONTROL ROOMCheck the digital indicators are in working condition, if it is not in working condition, gate could not be operated /seen from the control room.3/25/2017
38 ELECTRICAL PARTSCheck the operation of Limit switches and if, not in working condition, it should be checked for proper contact with dial or wiring.T.P.I.C. should be checked for proper contact of all three phase otherwise single phasing will result in burning of motors.
39 THANKS POWER POINT PRESENTATION PREPARED BY ER.J.R.RATHOD, ER. K.B.TRIVEDIER. R.C.RANAD.E.E.(MECH.)N.W.R.W.S.& Kalpsar Department, Gandhingar