Floating Roof for Oil Tank

Abstract

A floating roof for an oil tank includes a beam unit and a plurality of float units secured on the beam unit. The beam unit includes a plurality of longitudinal beams and a plurality of transverse beams. Each of the longitudinal beams has an upright wall provided with a plurality of first transverse holes. Each of the transverse beams is located between two of the longitudinal beams and has a bottom plate and two transverse side plates. Each of the two transverse side plates has a second transverse hole. The beam unit further includes a plurality of bolts each extending through one of the first transverse holes and the second transverse hole of each of the transverse side plates, and a plurality of nuts screwed onto the bolts, so that the longitudinal beams and the transverse beams are combined together.

1 . A floating roof for an oil tank, comprising:
 a beam unit; and   a plurality of float units mounted on the beam unit;   wherein:   the beam unit includes a plurality of longitudinal beams and a plurality of transverse beams connected with the longitudinal beams;   each of the longitudinal beams has an upright wall provided with a plurality of first transverse holes;   each of the transverse beams is located between two of the longitudinal beams and has a bottom plate and two transverse side plates extending upward from the bottom plate;   each of the two transverse side plates of each of the transverse beams is provided with a second transverse hole aligning with one of the first transverse holes of one of the longitudinal beams;   the beam unit further includes a plurality of bolts each extending through one of the first transverse holes of each of the longitudinal beams and the second transverse hole of each of the two transverse side plates of each of the transverse beams, and a plurality of nuts screwed onto the bolts, so that the longitudinal beams and the transverse beams are combined together; and   the float units are secured on and supported by the longitudinal beams and the transverse beams of the beam unit.   
     
     
         2 . The floating roof for an oil tank of  claim 1 , wherein:
 each of the transverse beams has a longitudinal side plate located between the two transverse side plates;   the longitudinal side plate of each of the transverse beams is provided with a plurality of longitudinal holes; and   the beam unit further includes a plurality of screws respectively extending through the first transverse holes of each of the longitudinal beams and the longitudinal holes of the longitudinal side plate of each of the transverse beams and respectively screwed into a periphery of each of the float units, so that the float units are locked onto the longitudinal beams and the transverse beams of the beam unit.   
     
     
         3 . The floating roof for an oil tank of  claim 1 , wherein:
 each of the transverse beams has two outside plates respectively extending outward from the two transverse side plates, with a slot being defined between each of the two outside plates and each of the two transverse side plates;   each of the two outside plates of each of the transverse beams is provided with a third transverse hole aligning with the second transverse hole of each of the two transverse side plates;   the slot of each of the transverse beams allows insertion of the upright wall of each of the longitudinal beams;   each of the bolts extends through the second transverse hole of each of the two transverse side plates of each of the transverse beams, one of the first transverse holes of each of the longitudinal beams and the third transverse hole of each of the two outside plates of each of the transverse beams; and   each of the nuts is screwed onto the bolts, so that the longitudinal beams and the transverse beams are combined together.   
     
     
         4 . The floating roof for an oil tank of  claim 3 , wherein:
 each of the transverse beams has a longitudinal side plate located between the two transverse side plates;   the longitudinal side plate of each of the transverse beams is provided with a plurality of longitudinal holes; and   the beam unit further includes a plurality of screws respectively extending through the first transverse holes of each of the longitudinal beams and the longitudinal holes of the longitudinal side plate of each of the transverse beams and respectively screwed into a periphery of each of the float units, so that the float units are locked onto the longitudinal beams and the transverse beams of the beam unit.   
     
     
         5 . The floating roof for an oil tank of  claim 1 , wherein the upright wall of each of the longitudinal beams has a lower end formed with a rib extending toward one side thereof. 
     
     
         6 . The floating roof for an oil tank of  claim 1 , wherein the upright wall of each of the longitudinal beams has a lower end formed with two ribs extending toward two opposite sides thereof. 
     
     
         7 . The floating roof for an oil tank of  claim 6 , wherein each of the longitudinal beams is made of a metal sheet plate which is bent to form the upright wall and the two ribs. 
     
     
         8 . The floating roof for an oil tank of  claim 6 , wherein each of the longitudinal beams is made of metal material which is extruded or cast to form the upright wall and the two ribs.