側(cè)滾式艙口蓋安裝調(diào)試工藝(a)(編輯修改稿)
2025-07-03 19:55 本頁面
【文章內(nèi)容簡介】 eld it on the correct location .Provide an adjusting allowance at the ends of the rails for cutting the final slopes the wheels so that the specified clearance wheel/rail in closed position can be maintained This means that the last section of the rail shall be installed after having the covers on the coaming .l Do not weld the rails pletely before the first operational tests of the cover ! ! ! 2. 7. Taking Covers on board and Aligning on Coaming2. 7. 1 The hatch cover panels shall be lifted on the hatch coaming by using the eye plates on the top place any loose items or stand on the hungup cover .The pair of panels can be positioned by using a portable jack and chain block Place suitable steel liners under side and end plates before lifting the panels on coaming .The theoretical distance between coaming top and the side plate is 15 mm .2. 7. 2 .There are reference lines punched on the hatch covers during the fabrication procedure .Similar reference marks are to be punched on top of the hatch coaming before positioning of the hatch cover . The hatch cover is positioned so that reference marks on the panels are aligned with the marks on the coaming .the rubber packing pression at meeting joint is 13mm+5/3,whenthe distance between the punch marks is 200mm. 2. 8. Installation of the wedge Guides 2．8. 1 The wedge guides are to be installed after the hatch cover panels have been positioned correctly on the coaming . 2．8. 2 The wedges are used to push the panel to a position,where pression at packing between panels is 13mm(the distance between the punch marks on the cover top plate is 200mm) and to hold the panels in this position . 2．8. 3 Check the below items after installation of the wedges (wedges in contact with their counter pieces) 2．8. 3. 1 The distance between the punch marks on the cover top plate is . the packing of the meeting part is pressed by 13mm,when panels are resting on their supports. 2．8. 3. 2 The hatch cover center line is in correct position in relation to the coaming center .2．9 Installation of RollupRoll Mechanisms2．9．1 Install the cog segement box for the Roll up Roll mechanism according to drawings BH410267011, The cog segement must be removed during the Installation. Align the box carefully in horizontal and vertical plane .the lifting pins (item 447)on the hatch cover panels shall be used as the reference point .For facilitating the installation of the cog segment box and the clevis bracket (item 438,439)for the control lever use of a template for making sure that the location from the pins on the hatch cover panels to the cog segement pin centers and further to control lever pin center is correct .2．9．2 Install the clevis bracket for the control lever in correct position in relation to the pin centers of the cog see that there is a tolerance given in the drawing for the position of the control lever pin .2．9．3 The amount of pression at the meeting joint seal can be adjusted by changing the length of the control lever. For the adjustment the end of the lever is attached to the lever by a threaded bar .2．9．4 When installing the control lever check the distance from the cog segment pin to the clevis bracket for the control lever (dimension A )Set the length so that dimension B=A450mm ,Tolerance for the control lever length is +0/3mm .Clearance between lifting pins and cog segment must be zero .2．9．5 .Test the operation of the cover and observe the amount of pression at the meeting joint seal. Adjust the pression as necessary for arriving at the at the specified figure .2．9．6 As a thumb rule half a turn on the control lever eye bolt (end of the control lever) corresponds to about 3mm in the seal pression . .NOTE： it is very important that there is no steel to steel contact between the hatch cover panels when reaching the end position in CL .This is beca
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