A Device For Lifting And Alignment Of A Diffuser And A Method Thereof

Abstract: A process for lifting and alignment of a diffuser on casing of an Interceptor valve including a Control valve in a steam turbine by a device comprising: a bottom plate (1); a lifting rod; a guide subassembly consisting of a top plate (3), a guide plate (7), a locating pin (8), a plurality of screws (9) and a guide pin (10); a setting ring (5); a lifting nut; a holding plate subassembly consisting of a holding plate (11), a locating plate (12), and a gauge plate (13); and plurality of screws (14); two studs (15), a plurality of washers(16) and nuts (17); and two threaded pins (18 & 19), and the process comprising the steps of fitting of the bottom plate (1) having diameter (D4) inside the diameter (D3) of the diffuser; fitting of the guide plate subassembly inside the diameter (D8) of the diffuser; fitting of the lifting rod along with setting ring, screws and lifting nut in such a manner that threaded portion (H6) of lifting rod is tightened inside hole (H5) of bottom plate (1); lifting the diffuser by overhead crane after fitting an eye bolt in a hole H8 of the lifting nut (4) and dipping the same inside the container having liquid nitrogen for cooling purpose; locating and fastening the holding plate subassembly together with screws; clamping holding plate subassembly with interceptor valve and control valve casing through holes (H15) of Holding plate (11) on pitch circle diameter (D9), with two studs (15), four washers (16) and nuts (17); locking the rotation of holding plate subassembly by a first portion and a second portion (H13/H14) and a third and a fourth portions (H11/H12) of the threaded pin (18 and 19) which are guided inside the holes (D11,D10) of the interceptor valve (IV) and the control valve (CV) casing respectively; heating of the interceptor valve (IV) and control valve (CV) casing by induction heating for the shrink fitting diffuser; and lifting and fitting the diffuser inside the interceptor valve(IV) and control valve(CV) casing after, heating of the casings of interceptor valve (IV) and control valve (CV) and cooling the diffuser completely.

Patent Information

Application #

Filing Date

10 May 2014

Publication Number

35/2016

Publication Type

INA

Invention Field

MECHANICAL ENGINEERING

Status

Email

lsdavar@ca12.vsnl.net.in

Parent Application

Patent Number

Legal Status

Grant Date

2021-03-11

Renewal Date

Applicants

BHARAT HEAVY ELECTRICALS LIMITED

REGIONAL OPERATIONS DIVISION (ROD), PLOT NO: 9/1, DJ BLOCK 3rd FLOOR, KARUNAMOYEE, SALTLAKE, KOLKATA-700091, having its Registered Office at BHEL HOUSE, SIRI FORT, NEW DELHI -110049, INDIA

Inventors

1. SWAPAN SARKAR

c/o Bharat Heavy Electicals Limited, Heavy Electrical Equipment Plant, Ranipur, Haridwar-249403, Uttarakhand, India

2. ANKUR MEGHANI

c/o Bharat Heavy Electicals Limited, Heavy Electrical Equipment Plant, Ranipur, Haridwar-249403, Uttarakhand, India

3. DILIP KUMAR

c/o Bharat Heavy Electicals Limited, Heavy Electrical Equipment Plant, Ranipur, Haridwar-249403, Uttarakhand, India

4. RAVIKANT SAINI

c/o Bharat Heavy Electicals Limited, Heavy Electrical Equipment Plant, Ranipur, Haridwar-249403, Uttarakhand, India

Specification

CLIAMS:Please find the attached file ,TagSPECI:Please find the attached file

Documents

Application Documents

#	Name	Date
1	GPA.pdf	2014-05-13
2	FOA.pdf	2014-05-13
3	F3.pdf	2014-05-13
4	F2.pdf	2014-05-13
5	DW.pdf	2014-05-13
6	531-KOL-2014-(19-06-2014)-FORM-1.pdf	2014-06-19
7	531-KOL-2014-(19-06-2014)-CORRESPONDENCE.pdf	2014-06-19
8	531-KOL-2014-FORM-18.pdf	2014-10-29
9	531-KOL-2014-FER.pdf	2018-11-23
10	531-KOL-2014-OTHERS [20-05-2019(online)].pdf	2019-05-20
11	531-KOL-2014-FORM 3 [20-05-2019(online)].pdf	2019-05-20
12	531-KOL-2014-FER_SER_REPLY [20-05-2019(online)].pdf	2019-05-20
13	531-KOL-2014-ENDORSEMENT BY INVENTORS [20-05-2019(online)].pdf	2019-05-20
14	531-KOL-2014-DRAWING [20-05-2019(online)].pdf	2019-05-20
15	531-KOL-2014-CLAIMS [20-05-2019(online)].pdf	2019-05-20
16	531-KOL-2014-PatentCertificate11-03-2021.pdf	2021-03-11
17	531-KOL-2014-IntimationOfGrant11-03-2021.pdf	2021-03-11

Search Strategy

1	531_KOL_2014_05-04-2018.pdf