Cause of standard section connecting bolt looseness

Cause of standard section connecting bolt looseness are:mixed installation team personnel,without training,technical quality is uneven,not according to the requirements of construction lifter specification operation,safety awareness is weak;For the provincial process,using the hoisting machinery auxiliary conjoined assembled parts installed,or the standard section on the surface of the assembled integral hoisting,after inspection on connection bolt without fastening;Hand after temporary fixed screw bolt acmotor2.blogspot.com tightening,no longer bolt not use gaskets;Fastening bolt tool is simple,did not use professional torque wrench,short of bolt fastening value;Helped wall after completing the first nut bolts,and the scene the cap number is not enough,back cap missing or not tighten. Helped wall bolt hole is too big,did not use more than electric motor cooling fan 100 x 100 mm 60 mm thick steel gasket;Use of ordinary bolt temporarily use does not change in time. Helped wall bolts are mostly use double-headed screw,and no marked strength,use length,double nut can't tighten;Non-standard professional unit self-check,the acceptance is not serious;Daily use do not timely check and tighten,repair,maintenance,lead to loose bolts,etc.

Second,the elevator installation specification requirements Construction lifter standard section is the spine of the elevator,carrying the weight of the machine itself and cargo movement,the hoisting cage depends on the post up and down reciprocating wheel attachment for standard section,so ac motor electric 65kw attached wheel interface connection,enables the wheel to balance force. Wheel and rack and the place such as transmission mechanism of gear meshing size have the higher requirement of its technology,make sure that the standard section pillar tube joint fault status difference,respectively,0.5 mm and 0.3 mm or less,or less at the same time,the adjacent two rack joint along the direction of tooth difference of 0.3 mm or less,along the length of the tooth difference should be 0.6 mm or less.On the standard section of guide rail and rack column for the first time after installation bolt screw die or have a rivet head. Standard section permanent magnet motors for sale function and requirements of each production manufacturer and requiring less random text file,standard and theory of standard section is not detailed,the expression of the usual safety education,safety inspection and technical clarificaiton,less to this requirement. 

Installation and removal of personnel the subconscious thought standard section strong deformation can not easily,but there is no detailed check for standard section of the wall thickness,therefore in the standard section conjoined assembled parts assembly neglected the connecting bolt fastening.Elevator in the process of installation standard section,section of up to 9 meters high adhesion after installation,the installation of the standard section with conjoined assembled parts are,bolt pseudo screw fixation can be buried. Hanging basket load up and down reciprocating motion acceleration is loose easily guide system two guide verticality and guide the error of the centerline of the overlap is greater than 2 mm,influenced by and other forces,at this time would be a counter weight to run a block or thrown,rope,wire rope guide wheel clearance of large and small. Actuator motor after repair,the rotation speed mismatch cause the vibration of hoisting cage and noise increases,hysteresis shouldn't run into events. Elevator conjoined assembled parts installation operation standard section,to the frequent work of elevator running buried the curse. To resolutely put an end to this is not in conformity with the specification requirements of the installation operation,to regulate the behavior of equipment installation and use.