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IS 7054 (1973): Specification for Casing for BucketElevators [MED 6: Continuous Bulk Conveying, Elevating,Hoisting Aerial Ropeways and Related Equipment]

IS : 7054 - 1973

Indian Standard

SPECIFICATION FOR

CASING FOR BUCKET ELEVATORS

( First Reprint APRIL 1988)

UDC 621.867.3:621.214

0 Copyright 1974

BUREAU OF INDIAN STANDARDS hIANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MAR0

NEW DELHI 110002

Gr 6 March 1974

IS : 7054 - 1973

Indian Standard

SPECIFICATION FOR

CASING FOR BUCKET ELEVATORS

Conveyors, Vertical Hoists and Bucket Elevators Sectional Committee, EDC 61

Chairman

* SHRI N. V. KRISHNAMURTHY Representing

Dunlop India Ltd, Calcutta

Members

SI~RI VASU IYENGAR (Alternate te Shri N. V. Krishnamurthy)

SHRI S. BAGCHI SHRI C. S. RAY (Alternate)

SHRI A. B. BANERJEE SHRI S. SINHA (Alternate)

SHRI P. K. BANERJEE SHRI N. N. BI~ARGAVA

SHRI M. K. V. CHARI (Alternate) SHRI K. BHATTACHARYA SHRI N. CHAKRABORTY

SHRI 3. RAGHAVAN (Alternate) SHRI A. K. CHATTERJEE

Mining & Allied Machincly

Coal Board, Dhanbad

Corporation Ltd, Durgapur

Hindustan Steel Ltd, Ranchi .McNally-Bird Engineering Co I.td, Calcutta

Directorate General of Mines Safety, Dhanbad Ministry of Shipping & Transport

The Indian .\lechanization & Allied Products Ltd, Calcutta

SHRI IQ_BAL SINCH National Mineral Development Corporation Limited, Hyderabad

SHRI B. S. K_~KKAR SHRI K. C. MEHROTRA (Alternate)

SHRI N. N. KAPUR SHRI A. S. KMNKHOJE,

&RI A. V. MANOHAR RAO (Alternate) SHRI K. K. KHOSLA

SHRI R. K. SUBHRAMANIAM (Alternate) SHR1 V. K. KUWLANI

SHRI A. N. INWJRKAR (Ahmate) SHRl S. v. MANI

SHRI B. N. DHEER (A&ma@) SHRI P. RAJAC~PAL MENON SHRI P. M. NETYANANDAN (rllternate) SHRI A. K. MUKHERJEE

SHRI J. B. CHANDR~ (Al&mate) SHRI M. C. PATEL

SHRI C. B. THAKORE (rll.&rnatc) .%IRI s. G. PAUL

SHRI AMITABHA SEN (dlternate) SHR~ S. G. PRADIIAN SHRI H. A. RAMSDALE

SHRI P. CHATTERJEE (Alternate) SHRI B. T. RAY SHRI N. N. ROY SHRI P. K. SESHADR~ DR. B. SINGH SHRI S. M. RAXVI,

Deputy Director (Mech Engg)

The Fertilizer Corporation of India Ltd, New Delhi

Balmer Lawrie and Co Ltd, Calcutta The Associated Cement Companies Ltd, Bombay

Meameco Ltd, Calcutta

Voltas Limited, Bombay

Greaves Cotton & Co Ltd, Bombay

Gear India (Madras) Pvt Ltd, Madras

Tata-Robins-Fraser Ltd, Jamshedpur

Elecon Engineering Company Ltd, Vallabh Vidyanagar

National Rubber Manufacturers Ltd, Calcutta

Tak Machinery Ltd, Bombay Geo Millar & Co Private Ltd, Calcutta

Indian Iron & Steel Co Ltd, Calcutta National &al Development Corporation Ltd, Ranchi Neyveli Lignite Corporation Ltd, Neyveli Central Mining Research Station (CSIR), Dhanbad Director General, BIS (Ex-ofi& Member)

Secretary

SHRI B. L. RAINA Deputy Director (Me& Engg), BlS

+Shri N. V. Krishnamurthy was the Chairman for the meeting in which this standard was finalized.

( Continued on page 2 )

0 Cofiyright 1974

BUR_EAU OF INDIAN STANDARDS

Tl+ publication is protected under the Indian Copyright Act (Xiv of 1957) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of

copyright under the said Act.

Is t IO!54 - 1973

( Continued from page 1 )

Bucket Elevators Subcommittee, EDC 61 : 3

Comentv &RI B. S. KAKKAR

Members

Rrpnsrntins The Fertilizer Corporation of India Ltd, New Delhi

&RI K. C. MEHROTRA (Aftcrnota to Shri B. S. Kalckar)

SHRI N. N. BHAROAVA DR. P. D. RAO (Altmnatc)

SHRI NAZAR FUTEHALLY SHRI J. J. MISTRY (Alterna~)

Sxim V. I~ENGER SHRI A. S. KHANKHOJE

SHRK A. V. MANOEIAR ho (Alurmtr) SHRI K. K. KHOSLA SXIU R. K. S-M (A&ma@ SHIU A. K. MUKHERJ~E

SHRI J. B. CHANDRA (Altumat~) SHRI B~NUBHAI I. PATEL

%XItI M.C. PATEL(Afhaf6)

McNally Bii Engineering Co Ltd, Calcutta

Dynacraft Machine Co Pvt Ltd, Bombay

Dunlop Indii Ltd, Calcutta The Associated Cement Companies Ltd, Bombay

Meameco Ltd, Calcutta

Tata-Robins-Fraser Ltd, Jamshedpur

Elecon &ginecring Company Ltd, Vallabh Vidyanagar

xs : 7054 - 1973

In&m Standard

SPECIFICATION FOR

CASING FOR BUCKET ELEVATORS

0. FOREWORD

0.1 This Indian Standard was adopted by the Indian Standards Institution on 30 October 1973, after the draft finalized by the Conveyors, Vertical Hoists and Bucket Elevators Sectional Committee had been approved by the Mechanical Engineering Division Council.

0.2 This standard pertains to casing for : a) centrifugal discharge bucket elevators, b) positive discharge bucket elevators, and c) continuous bucket elevators. The buckets are mounted on chain or belt in case

of centrifugal discharge and continuous bucket elevators, however, in case of positive discharge bucket elevators the buckets are mounted on chain.

0.3 While preparing the standard, assistance has been derive2 fro% the information received from the Fertilizer Corporation of India Ltd, Sindri.

0.4 For the purpose of deciding whether a parti- cular requirement of this standard is complied with, the final value, observed or calculated, ex- pressing the result of a test, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained ii? the rounded off value should be the same as that of the specified value in this srandard.

*Rules for rounding off numerical values (recked).

1. SCOPE

1.1 This standard lays down the requirements of casing for vertical bucket elevators having buckets mounted on chain or belt. It specifies principal dimensions relating to different parts involved such as hood, head section, intermediate section, dis- charge spout and take up. This standard also deals with the general mechanical engineering requirements.

1.2 This standard does not cover the requirements for inclined bucket elevator casings and is not applicable to elevators handling material which does not behave as a solid.

2. TERMINOLOGY

2.1 For the purpose of this standard, the dcfini- tions given in IS : 4240-19677 shall apply.

3. MATERIAL

3.1 The casing material shall bc as such to suit the service conditions.

4. DIMENSIONS

4.1 The main dimensions for the casing for ccntri- fugai discharge, positive discharge and continuous discharge bucket elevators having bucket mounted on chain or belt shall be as given in Tables 1 to 5 read with Fig. 1 to 3.

4.1.1 Recommended thickness for the sheets used in fabrication of the casing for bucket elevator shall be 2.00, 2.50, 3.15, 4.00, 5.00 and 6.3 mm.

tGlossary of conveyor terms and definitions.

However, in case of lined casing, thickness of lining shall depend upon the material of the lining and the working condition. In case of mild steel sheets the minimum thickness of casing shall be 3.15 mm.

5. MANUFACTURE

5.1 The casing shall bc either of (a) welded and bolted construction or (b) riveted or bolted cons- truction. Intermediate section, boot section, head section, hood and discharge spout are bolted together to give full length of the bucket elevator. However, air vent shall be provided in the hood wherever necessary.

5.2 If required, casing may be lined with rubber, stainless steel or aluminium sheets.

6. TAKE UP DEVICE

6.1 Take up device shall bc provided for all bucket elevators. The take up may be at head shaft or boot shaft as desired by the purchaser depending upon the service conditions and layout of the plant.

6.2 Take up device at the head shaft shall be of screw type and take up at the boot shaft shall bc either of screw type or of gravity type.

7. INSPECTION COVER

7.1 The casing for bucket elevator shall be provid- ed with one or more inspection covers as desired by the purchaser. The location of the inspection cover shall be according to purchasers rcquirc- ment depending upon the layout of the plant.

3

YC 0 F! jHAF

j -A INhC--

A27

1111 dimensions in inillinlctrcs.

FIG. 1 DIhlENsIoNs I'oR C:AsING FOR ~ENI'RIFUGAL DISCHARGE BUCKET ~LEVATOKS FOR BUCKETS ON CHAINS AND/OR ON BELTS

8. CLEAN OUT DOORS 8.1 The clean out doors at the boot section shall be provided to remove any material from the bottom of the elevator for maintenance or cleaning.

9. DESIGNATION 9.1 The casings shall be designated by the follow- ing :

a) Commonly used name, b) Type of casing, c) Nominal size, and d) IS Number.

Example : A casing of Type A and of nominal size 5 shall

be designated as: Casing A5 IS : 7054

4

IO. MARRING

10.1 Different sections of the casing shall be match- marked to facilitate erection at the site.

10.2 The casing shall be marked with the following information on the name plate provided on the bucket elevator at the suitable prominent place(s) :

a) Manufacturers identification; b) Type and nominal size of bucket elevator; c) Capacity of bucket elevators, t/h; and d) Any other information required by the

purchaser.

10.3 The casings may also be marked.with the IS1 Certification Mark.

IVOTE - The use of the ISI Certification Mark is governed by the provisions of the Indian Standards Institution

--H I------G-----IL-H

All dimensions in inillinletres.

FIG. 3 DIMENSIONS FOR CARING FOR CONTIWOI.S BI:CKF.T ELEVATORS FOR HUCKETS ON

NOW

N.4L BUCKET SIZE LENGTH*

1 150

2 175

3 200

4 250

5 310

6 360 ti

? 410

8 460

9 510

10 560

11 610:

12 610:

13 8OOt

14 800:

15 1000

A B C D E F

900 280 303 280 860 140

900 300 300 280 860 165

980 330 360 280 900 190

! 180 380 410 310 1000 240

I 124 43Q 460 330 1 050 300

1 360 480 460 330 1200 350

1 400 5.50 500 340 1 230 400

1 400 600 500 340 1230 450

1400 650 500 340 1 230 508

1400 700 500 340 I 230 550

1400 750 500 340 1 230 600

1 500 750 610 360 1 300 600

1400 950 500 340 1 230 780

I 500 950 610 360 1300 780

1 500 1 150, 610 368 1300 980

TABLE 1 DIMENSIONS FOR CASING FOR CENTRIFUGAL DXXHAFtGE BUCKET ELEVATORS FOR BUCKETS ON CHAIN (TYPE A)

(Chs~ 4.1, aqd Fig. 1)

All dimensions in millimetra.

*Refer IS : 6833-1973 Specification for buckrts for bucket elevators. tFor bucket projection ;p to and including 200 mm. ZFor bucket projection abow 200 mm.

G H 3 x L M V

700 loo 370 520 380 310 700

700 100 370 520 380 510 700

780 100 420 560 420 560 750

780 loo 470 700 480 680 800

1 040 100 530 730 510 710 850

1 160 100 580 770 590 780 900

1200 100 660 790 610 800 900

1200 100 710 790 610 800 900

1200 loo 760 790 610 a25 900

1200 100 810 790 610 a25 900

1200 100 860 790 610 850 900

1 300 loo 860 a40 660 900 950

1200 100 1060 790 610 850 900

1300 100 1060 840 660 900 9.50

1300 100 1260 840 660 900 950

P TU R

250 200 660

250 200 660

250 200 700

300 200 800

360 200 a50

400 250 95Q

425 250 980

425 250 980

425 250 930

425 250 980

425 250 980

500 250 1050

425 250 980

5oQ 250 1050

500 250 1050

IS : 7054 - 1973

TABLE 2 DIMENSIONS FOR CASING FOR CENTRIFUGAL DISCHARGE BUCKET ELEVATORS FOR BUCKETS ON BELTS (TYPE B)

(C&use 4.1, and Fig. 1)

All dimensions in millimetres.

NOMINAL BUCKET SIZP, I,ENGT~*

1 150

2 175

3 200

4 250

5 310

G 3GO

7 410

8 4CO

9 510

10, 5GO

11 Glot

12 GlO$

13 800?

l-2 8OO$

15 1 000

B

400

400

400

400

500

500

GO0

600

750

7.50

950

950

1 150

1 150

1400

c D F H

300 280 140 100

300 280 140 100

3FO 280 190 100

410 310 240 100

4GO 330 300 100

4GO 330 350 100

500 3-10 400 100

500 340 450 100

500 340 500 100

500 340 550 100

500 340 600 loo

610 BGO GO0 1 on

500 310 780 inn

Gl0 360 780 in0

610 360 980 100

J N

490 700

490 700

490 750

490 non

600 n.;n

600 9nn

710 9oo

710 900

860 900

8GO nno

I 060 WI

1 OGO 950

i 2Gn 900

i 2cn !l:fi

1 510 950

I

2 50

2.50

250

300

360

400

425

425

425

425

42.5

500

425

500

580

Dimensions A, E, G, K, L, M, R, and S shall be calculated as given below after selecting pulley diameters which will depend on number of plies used [seeIS : 1891 (Part I) - 1968 Specification for rubber conveyor and elevator belting: Part I General purpose belting (Jirst re&ion)] : A = Head pulley diameter +2 (bucket projection) +2 (belt thickness@ $2 (front clearance). E = D+ Tu+O.5 (boot pulley diameter) + belt thickness$+bucket projection + bottom clearance G = A-2H X = 0.5 A+n

) where a = Head pulley diameter - boot pulley diameter

L=0.5A---a 2 M = 0.5 ASHeight of centre of shaft from bottom of bearing housing R= E-7-U S= E+TU 777 shall be equal to one percent of centre-to-centre distance of shaft or 200 mm, whichever is higher. *Refer IS : 6833-1973 Specification for buckets for bucket elevators. tDimensions given are for bucket projection up to and including 200 mm. SDimensions given are for bucket projection above 200 mm. $Refer manufacturers catalogue. ,iFront and bottom clearances will depend upon the lump size and shall be 100 mm, Min.

8

TABLES DIMENSi ONS FOR CASING FOR CONTINUOUS BUCKET ELEVATORS FOR BUCKJITS ON BELT (TYPE E)

(CcmW 4.1, and Fig. 3)

All dimensions in millimctres.

NYz 1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

BUCKET BUCKET LENGTH+ PROJECTION*

150 75

200 125

250 150

250 180

310 180

310 200

360 180

360 200

410 200

460 280

,460 300

510 250

510 300

610 250

610 300

B c D F H J .N P

400 250 870 100 100 498 650 250

400 350 870 150 100 490 740 250

400 400 1150 200 100 490 740 250

400 460 1150 280 100 490 840 380

500 460 1 150 260 100 600 840 380

500 500 1150 260 100 600 840 380

500 469 1200 310 100 600 840 380

500 500 1200 310 100 600 840 380

600 500 1200 360 100 710 840 450

600 380 1200 410 100 710 840 450

600 700 1250 410 100 710 900 450

750 600 1250 460 100 860 900 450

750 700 1230 460 180 860 900 450

950 608 1250 560 180 1060 960 450

950 780 1250 560 100 1060 900 450

Dimensions A, E, C, K, L, M, R, and S shall be calculated as given below after sckcting pulley dimera which will depend 1 (Part I)-1968 %Q&ica~ for rubber conveyor and ekvator belting: Part I

A = Head Puuey diameter i-2 (bucket projection) +2 (bdt thickncmt) +2 (front clearance:). E = D+lT.l+QS (boot p&y dieter) + belt thicknewt + bucket pmjcction -+ bottom clearance.,+ G = A-2H X = 0.5 A+o L = 0.5 A-o >

whae_H=d~~t-~~~ 2

M = 0.5 A+h&ht ofccntrc OhsbaR from the bottom ofbearlug housii. R-E-l-U S= M+TU

l Refa IS : 6833-1973 %ptcikatioa fbr buck& fa bucket ekaturs. tRefkr matmfactuters cambguc. SFront and bottom Ck=UlCUWilldC+dUpOtltbClUtDprbeU8C!dSU%lrh9k1lNl~,Min.

Reprography Unit, BIS, New Delhi, India

j: (Reaffirmed 2002)