IS 3917: Scoop Type Bed Material Samplers

11 Pages·2003·1.1 MB·English

by  Bureau of Indian Standards

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IS 3917 (2003): Scoop Type Bed Material Samplers [WRD 1:
Hydrometry]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
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“Knowledge is such a treasure which cannot be stolen”

IS 391T :2003
(Reaffirmed 2004 )
~~~~-~
~erur )
( qi5Ml
Indian Standard
SCOOP TYPE BED MATERIAL SAMPLERS
SPECIFICATION
( First Revision)
res 17.120.20
© BIS 2003
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BA HADUR SHAH ZAFAR MARG
NEW DELHI 110002
JUlie 2003 Price Group 3
Fluid Flow MeasurementSectional Committee, WRD I
FOREWORD
ThisIndian Standard(FirstRevision) wasadoptedbytheBureau ofIndianStandards,after thedraft finalized by
theFluidFlowMeasurementSectional Committee hadbeenapprovedbytheWater ResourcesDivisionCouncil.
Silt,sand,gravel andother insoluble materials transportedbythe streams asbed load, wash loadand suspended
loadpresentproblemsofvital importancewithregard tosuccessful operationofmany projectsconcerningflood
control, soil conservation, irrigation, navigation, water-power development, etc. Therefore, to have adequate
knowledgeofthesedimentloadmovementandofthedeterminationoftheparticlesizeofbedmaterial,asystematic
samplingofthe sedimentatregularsampling station ishighly desirable.
Different types ofsamplers like bed material samplers, bed load samplers, suspended sediment load samplers
exist which varywidely intheir design, principlesofworking andutility inthedirect estimation oftherelevant
typeofsediment load. Bedmaterial samplers are used forcollectingsamples ofthematerial, theparticle sizeof
which are found inappreciablequantities intheportion oftheshiftingbed ofthe stream.
The functional requirements ofthe bed material samplersare given in3. Several types ofsamplers have been
developed to cater foranumberofthese requirements. These samplers may begroupedas follows:
a) Drag bucket type,
b) Vertical pipe type,
c) Grab type, and
d) Scoop type.
InIndia, scoop type bed material sampler ismost commonlyused.
This standard was first published in 1966. In this revision, merits and demerits ofscoop type bed material
sampler have beenadded apart from affecting certain editorial changesandupdatingofreferencestothe Indian
Standards.
Forother type ofsamplers forthebed materials, areference may bemade toIS 15360:2003 'Measurementof
liquid flow in open channels- Bed material sampling' which is based on ISO 4364: 1997"Measurement of
liquid flow inopen channels- Bedmaterial sampling'.
Forthe purpose ofdecidingwhetheraparticular requirementofthis standard iscompliedwith, the final value,
observedorcalculated,expressingtheresultofatestoranalysis,shallberoundedoffinaccordancewithIS2 :1960
'Rulesforroundingoffnumerical values(revised)'. Thenumberofsignificantplaces retainedintheroundedoff
value should bethe same as thatofthespecified value inthisstandard.
IS 3917: 2003
Indian Standard
SCOOP TYPE BED MATERIAL SAMPLERS
SPECIFICATION
( First Revision)
1SCOPE e) The sampler should be capable ofcollecting
bedmaterialsamplesirrespectiveofthedepth
Thisstandardspecifiesthefunctionalrequirementsand
ofbed.
performancetestsofscooptypebedmaterialsamplers
andmaterialstobeused for itsmanufacture.
4GENERALDESCRIPTIONANDOPERATION
2REFERENCES
4.1 General
The standards listed below contain provisions which
Thescooptypebedmaterialsamplerhasthefollowing
throughreference inthistext constitute provisions of
merits anddemerits:
thisstandard. At the time ofpublication, the editions
indicated were valid. All standards are subject to
Sl Merits Demerits
revision and parties to agreements based on this
No.
standard areencouragedto investigate thepossibility
ofapplying the most recent editions ofthe standards i) It is simple in It creates undesir-
indicatedbelow: design, construction .able disturbances
andworking near the bed of the
ISNo. Title
stream for want of
1068: 1993 Electroplatedcoatingsofnickelplus
streamlined shape
chromium and copper plus nickel
ii) It can be readily It can not be used
plus chromium (thirdrevision)
repaired at the spot forgreaterdepths
1239(Part I) : Mildsteeltubes, tubularsandother
without much diffi
1990 wrought steel fittings: Part 1Mild
culty
steeltubes(fifth revision)
iii) Itcan be operatedby
1570 Schedulesforwroughtsteels:Part2
one or two observers
(Part2/Secl) : Carbon steels (unalloyed steels),
without the help
1979 Section 1Wrought products (other
of any intricate
thanwires) withspecifiedchemical
mechanical device
composition and related properties
and normally up to a
(first revision)
depth of5m
1856: 1977 Specificationforsteelwireropesfor
haulagepurposes (secondrevision)
13156: 1991 Sheave pulley blocks for wire rope 4.2Description
- Specification
The scoop type bed material samplershall consist of
thefollowing main parts:
3FUNCTIONALREQUIREMENTS
a) Thescoop (or digger) andcowl,
The functional requirements ofan ideal bed material
samplerare: b) Pulleys andstrandedflexible wire,
c) Pipearrangement,and
a) The sampler should be stream-lined soasto
reduce disturbance tothesediment flow; d) Upper clamp and handle arrangements.
b) The sampler should beable tocut a layerof 4.2.1 The principal parts ofthe samplerareshown in
8cm to 10 em thickness of the material
Fig. 1. The eccentrically mounted scoop which
present on thestream bed;
revolves inside thecowl shall have asharp frontedge
c) The material cut should be so entrapped in whichshallproject slightlyoutofthecowlinthefully
the sampler that it remains intact, while the opened condition. The scoop shall be connectedto a
sampler is being raised froin the bed to the
pulley andflexible wirearrangementatthelowerend
watersurfaceandunloadedintothecontainer;
outside thecowl. Atthepulley endofthecowl apipe
d) The sampler should have arrangements for shall be welded to itthrough which the flexible wire
operation from theboat, bridge, etc;and shallpass.Piecesofpipes maybejoinedtogether with
IS3917: 2003
12
20
BOTTOM VIEW OFCOWl
ANDDIGGER
SECTION xx
127
SECTION YY
51 Description 51 Description
No. No.
1 Scoopordigger 12 Car
;~ 13 Upperpulley55mmdia
}Bolts
14 ScrewforfiXingstrandedwireropeto
3 Cowl upperpulley
4 Angleiron 15 Loverslot
5 Socket 15AUpperslot
6 Lowerclamp 16 Flynutscrew
7 Lowerpulley55mmdiaaprox 17 Upperclamp
8 Screwforfixingpulley 18 ScrewforfiXingclampwithGIpipe
9 Strandedflexiblewirerope 19 10mmdiabolt
10 Screwforfixingstrandedwirerope 20 Handle
11 GIpipe 21 SteelRod
Alldimensionsinmillimetres.
FIG. I DETAILS OFSCOOP TYPE BED MATERIAL SAMPLER
threadedsocketsto makeup the required length. The 4.3.2 Scoop andCowl
other end ofthe flexible wire shall pass through a
4.3.2.1 Scoop
second pulley. The rotation ofthe handle shall move
the pulleys which in tum rotate the scoop so that the Thescoop ordigger(1)shallbeapproximately 1.6mm
opened mouth turns up insidethe cowl. thick, 75rnmdiameter,200mm longhollowcylinder.
The cylindershouldbecutthroughoutits length soas
4.3 DetailsofAssembly
to have an opening ofsufficient size (approximately
4.3.1 General 40 mm) width and ofthe shape as shown in Fig. 1.
Oneedgeofthisopeningsliallbesharpenedforcutting
Details ofvarious parts ofscoop type bed material
the bedmateriaI.Twoeccentricholesalongthe same
samplerare shown inFig. 1.
2
IS3917 :2003
horizontalaxisshouldbemadeinthetwoendsidesof 4.3.4PipeArrangement(11)
the scoop cylinderto fit itthrough two bolts (2a, 2b)
A pipe ofsuitable size approximately 19 mm and
passedthrough theseholestothecowl(3),theheadof
25mm internal and external diameter respectively,
theboltsbeingweldedtothesideofthescoopasshown
having grooves atboth ends shaJIbefixed tothepipe
inFig.1andtheotherendsecuredbyanutfromoutside
socket (5) weldedtothe angle iron (4) which itselfis
thecowl, insuchaway thattheboltcanrotate inside
welded tothe upper surfaceofthe cowl (3). Separate
thecowl hole.
pipepiecespreferablyeachof2mlengthshallbeadded
4.3.2.2 Cowl to this pipe (11) to make the required length ofthe
samplerthroughpipesockets. Through thesepipesthe
Thecowl(3)whichformstheoutercoverofthescoop
flexible wire rope (9) should bepassed insuchaway
(1) in which the latter is eccentricalIy mounted and
that one portion ofwire rope runs through the pipes
rotates, shalIbeapproximately 1.6mm thick holIow
and the other portion partly inside and partly outside
cylinder 230 mm long, 125 mm diameter, having
thepipes.Forthispurposeatintervals of1mlengthof
flattened topand bottom. The flattened base shalIbe
each pipe, a slot should be cut. In the top most pipe
cuttohavesufficientopening(approximately90mm)
another slot of suitable dimensions (approximately
along the entire length of the cylinder. On the top
65mmlongand 15mmwide) shaJIalso becut(about
flattened surface (approximately 75 mm width) an
185mm) below the cap ofthepipe (12) u'pperpulIey
angleiron(4)shall bewelded. The pulIey end ofthis
(13)andhandlearrangementsshalIbefixedtothistop
angle iron(4) shall be welded to a pipe socket (5) to
slot. The wire rope (9) shalI be securely fixed by a
whichapipe(11)shalIbeattached.Twoeccentricholes
screw (10) to the centre ofthe groove ofthe lower
along the same horizontal axis ofthe cowl shalI be
pulIey(7) insuchaway that itsone side runsthrough
madeinitstwosidescorrespondingtotheholes made
thepipes and shalIthen be securely fixed by a screw
onthesidesofthe scoop cylinder.
(14) to the centre ofthe groove ofthe upper pulIey.
4.3.3 Pulleys, Pulley Clamp and Stranded Flexible Theother sideofthe wire rope after passing over the
Wire lowerpulIeyshallbecarried outsidethepipe uptoits
lowerslot(15). ItshalIthen becarriedinside thepipe
To the pulIey end side ofthe cowl ofa clamp (6) of
through theslot(15)up tothe slot(15A) oftheupper
the shape shown in Fig. 1shalI be welded. Its ends
pipeandshalIthenbetakenout.ItshalIbesoarranged
shall be bent into two inverse right angles. The two
that itsupper most end after coming out ofthe upper
protrudingends shalIbeweldedtothepulIeyendside
slot shalI be fixed to the other end ofthe wire rope.
ofthe cowl. In the central portion ofthis clamp a
Forfixing these twoends, loops may bemadeineach
holeconcentrictothe one incowl and scoop shalIbe
end andjoinedtogetherthrough a fly nut screw (16),
made through which the bolt (2b) having its head
so that the tension in the wire rope can be adjusted.
welded inside thescoop shalIpass. Tothisboltasteel
This wirerope should pass overthetwo pulIeyssoas
puJIey (7) of about 50 mm diameter with a flange
to rotate the scoop (1) by handle attached to upper
shall be rigidly fixed through a screw (8), on the
pulley (13).
outside ofthe cowl (3) and inside the clamp (6), so
that it moves with the bolt (Zb). This bolt (2b) shall 4.3.4.1 Acap(12)shalIbefixedtotheuppermostend
then be tightly secured by a nut fixed to the outside ofthepipe.
oftheclamp (6) insuch away that thisbolt(2b) shaJI
4.3.5 UpperClampandHandle Arrangement
b~ free to rotate inside cowl (3) and clamp (6) hole
with scoop (1)andpulIey (7). Totheotherendofthe Thispartshallhavetwoessentialcomponentsasfollows:
scoop, head ofasimilarbolt(2a) shalIbeweldedand
a) Upperclamp to which the upper pulley and
theboltthenpassedthrough theconcentricholemade
handle shouldbeattached,and
inthecowl andsecuredbyanuttoitsothatthescoop
b) Handle.
can rotate freely inside the cowl on these two holes
(2a) and (2b). In the middle portion of pulIey (7) 4.3.5.1 Upperclamp(17)
grooves, a flexible wire rope (9) ofrequired length
Thearm oftheupper clamp shalIbe sufficientlylong
shalIbe securelyfixed by ascrew (10) insuch away
(420mm)andofapproximately 35mmwideand7mm
that w~en this wire rope is pulIed, pulIey and scoop
thickmetallic plate ofthe shape shown inFig. 1.One
rotateSImultaneously.ThiswireropeshalIbeattached
end ofitshalIbe clamp (17) shalIthen be screwed to
to the upper pulIey in such away that while passing
the pipe through screws (18), in such a way that the
over thegroovesoflower andupperpulIey itforms a
upper pulIey can freely rotate in the upper slot. At a
belt, which is rotated through a handle fixed to the
suitablelength(approximately340mm)fromtheother
upper pulley.
endofthis arm, ahole for bolt (say 10mmdiameter)
3
IS 3917; 2003
shall bemade. A bolt(19) shouldpassthroughbentto 5.3Pulleys
fonn a grip over the pipe in such a way that upper
Thepulleys shouldofrustproofmaterial and should
most slot width is not covered. On this bolt a pulley
preferablyconformto IS 13156.
(13) of approximately 55 mm diameter with a
protruding flange shall be mounted. To the otherend 5.4StrandedFlexibleWire
ofthis bolt(19) anutshallbeproperlyscrewedinsuch
Steel wire ropes used should preferably conform to
a way that the upper pulley can freely rotate on the
IS 1856.
bolt (19).
5.5Pipes
4.3.5.2 Handle
Pipesshouldbeofrustproofmaterial.Galvanizediron
A handle (20) shall befixed tothis upperpulley.This
pipes should be conforming to IS 1239 (Part I), The
handle shouldbebent intoanelbowshape, one endof
pipesshouldsuitablypainted.
which should be riveted to the upper pulley. A steel
rod (21) shall be fixed tothe otherend atrightangles
6TESTSFORPERFORMANCE
totakethehandle(20). Withtherotation ofthishandle,
pulley shall also rotate and through the wire rope the The samplershallsatisfythe following tests:
lowerpulleyandscoopwillalso rotate. With aview to
a) In a single scoop it should be able to scoop
facilitating easy operation when the handle is above
about8to 10emdepthofthebed layerwithin
the reach, a stringmay be tied onto the handleofthe
the specified range ofdepth and velocity,
sampler. namely,5m and3mls respectively;
b) Thescoopshouldbe practicallyfull (at least
4.4Operation
to 90 percent)whenitistaken out; and
The sampler, withthemouth ofthescoop openshallbe
c) The deflection in the pipe due to bending
lowered tothebedofthestream andallowedtoreston
while the final assembly of the sampler
the bed in this open condition. The handle connected
operatesatthespecifiedmaximumdepthand
with the top pulley shall be rotated from the boat or
velocity, thatis, 5 m and 3mls respectively,
bridge which in tum moves the flexible wire and the
shali not be more than 2 cm, and should be
lower pulley connected with the scoop. The scoop on
such that the operator does not feel any
rotationdigsorgrabsthesamplefromthebedofstream.
difficultydue to the deflection.
The sample shall becollectedinside the scoop and the
cowl shallprotect thesample from being washed away 7MARKING
while thesamplerisbroughttothe surface.
7.1 Each samplershall prominentlyshow the name of
5 MATERIALS themanufacturer,yearofmanufacture,etc,intheupper
clamp. A certificate from a well equipped laboratory
5.1 General showingthe details ofthe tests carriedout asspecified
in6shallbemadeavailabletothepurchaserondemand.
Typical examplesofmaterialstobeused fordifferent
components are given in 5.2 to 5.5 and this does not 7.1.1 BIS Certification Marking
preclude the use of alternative materials having
The product may also be marked with the Standard
characteristics equivalent to or superior to those
Mark
specified.
7.1.1.1 Theuse ofthe StandardMark is governed by
5.2 Scoop and Cowl
theprovisionsofthe Bureau ofIndian Standards Act.
The scoop and cowl should be preferablyof45C8 or 1986andtheRules andRegulationsmadethereunder.
50C8 steel conformingtoIS 1570(Part2/Sec 1)with Detailsofconditionsunderwhichalicensefortheuse
nickel coatinginaccordancewith IS 1068orasuitable oftheStaadardMarkmaybegrantedtomanufacturers
material ofequivalenthardnessand rust proof. or producers may be obtained from the Bureau of
IndianStandards.

4
IS3917 :2003
ANNEXA
(Foreword)
COMMITTEE COMPOSITION
Fluid Flow MeasurementSectionalCommittee,WRD 1
Organization
Central WaterCommission, New Delhi Representative(s)
SHRJM.GOPALAKRJSHNAN(Chairman)
AIMIL Private Ltd,New Delhi SHRJS. C.JAIN
SHRJK. S. SUBRAMANIAM(Alternate)
Bhakra BeasManagementBoard, Punjab DIRECTOR(WR)
SENIORDESIGNE"GINEER(WR) (Alternate)
Central Waterand Power Research Station, Pune SHRJA. R.CHAVAl\'
SHRJB.S.KULKARl\'1(Alternate)
Central WaterCommission, New Delhi SHRJS. K. SEl\'GUPTA
DIRECTOR(RO)(Alternate)
Consulting EngineeringServices (INDIA) Private Ltd, New Delhi SHRJT.S. BATHIJA
SHRJ S. S. NARA"G(Alternate)
Electronic Equipments,Pune SHRJV.R.MUl\'AGEKAR
SHRJS. R.MIJl\'AGEKAR(Alternate)
FluidControl Research Institute, Palghat (Kerala) DRNAGARAJSITARAM
SHRJJACOBCHANDAPILLAI(Alternate)
Indian Institute ofScience, Bangalore DR K.SRJDHARAl\'
Indian Institute ofTechnology (DepartmentofCivil Engineering), DRG.L. ASAwA
Roorkee
Irrigation Department, Governmentof Andhra Pradesh, Hyderabad DIRECTOR(ERS)
Irrigation Department, GovernmentofKarnataka,Sagar DIRECTOR(ERS)
Irrigation Department, GovernmentofPunjab, Amritsar CHIEFENGINEER(IPRI)
REsEARCHOFFICER(IPRI)(Alternate)
Irrigation Department,GovernmentofUttar Pradesh, Lucknow DIRECTOR(IRI)
CHIEFENGINEER(GANGA)(Alternate)
Ministry ofRailways (ROSO), Lucknow JOINTDIRECTOR(STANDARDS)
DEPUTYDIRECTOR(STANDARDS)(Alternate)
National HydroelectricPowerCorporationLtd, Faridabad SHRJSHANKRACHARYA
SHRJRAllYBABOOTA(AlternateI)
SHRJANILBHATNAGAR (AlternateII)
National Institute ofHydrology, Roorkee DIRECTOR
DR P.K. MOHAPATRA(Alternate)
National Physical Laboratory, New Delhi RESEARCHOFFICER
DIRECTOR(Alternate)
Inpersonal capacity(425/14 T.V.NagarPune 411 037, Maharashtrai DR S. V. CHITALE
BIS Directorate General Director& Head (WRD)
[RepresentingDirectorGeneral (Ex-officio)]
MemberSecretary
SHRJS. S. SETHI
Director and Head (WRD), BIS

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