Qingdao Xinxing construction machinery co., ltd.

High quality, professional service, being the top supplier in construction machine

Home > News > Content
Hydraulic Pipe Installation Precautions
- Sep 20, 2017 -


Analysis of the Causes of Oil Leakage


1.1 Poor pipeline quality Hydraulic Placing Boomhttp://www.xinxingbatchingplant.com/mobile-concrete-place/hydraulic-placing-boom.html

p20CA2F.jpg

 In the maintenance or replacement of hydraulic piping, if the hydraulic system installed in the poor pipeline, due to its low pressure capacity, short life, the use of time will not appear long oil leakage. The poor quality of the hard tubing is mainly due to the uneven thickness of the pipe wall, so that the carrying capacity is reduced. The poor quality of the hose is the poor quality of the rubber, the insufficient pulling force of the steel wire layer and the uneven weaving, so that the bearing capacity is insufficient, Easy to cause damage to the pipeline and oil spills.


1.2 pipe installation does not meet the requirements


1.2.1 pipe bending bad


   In the process of assembling the pipe, the bending radius should be bent according to the specified bending radius. Otherwise, the pipe will produce different bending internal stress, and the leakage will occur gradually under the action of oil pressure. The bending radius of the pipe is too small, it will lead to the outer wall of the pipe thinner, the inner wall of the existence of wrinkles, so that the pipeline at the bend there is a large internal stress, greatly weakened the intensity of strong vibration or high pressure, The road is easy to produce transverse cracks and oil leakage; if the hard tube bending parts of the larger oval, when the tube when the oil pulse is easy to produce longitudinal cracks and oil spills. Hose installation, if the bending radius does not meet the requirements or hose twist, etc., will cause damage to the hose and oil leakage.


1.2.2 pipe installation fixed does not meet the requirements


   Common installation Fixed:


  1) When installing the tubing, regardless of the length of the pipe, the angle, the thread is suitable for the assembly, the pipe deformation, resulting in installation stress, and it is easy to bruise the pipeline, resulting in its strength decreased;


  2) When installing the tubing, do not pay attention to the fixed, tighten the bolt when the pipe along with the rotation, resulting in the pipeline twisted or with other parts of the collision and produce friction to shorten the service life of the pipeline;


  3) pipe clamp is sometimes loose too loose, so that the pipe and the clip between the friction, vibration to strengthen; sometimes too tight, so that the pipe surface (especially aluminum tube) clip deformation; these conditions will make the pipeline broken and leakage Oil


  4) pipe joints tightening torque more than the provisions of the joints of the trumpet rupture, thread strain, tripping, resulting in serious oil spills.


1.3 hydraulic pipe fatigue damage or aging

201A82D.png

   A large number of hard hydraulic pipe fracture observation and analysis shows that the collapse of the hard tube is a fatigue damage, so the pipeline must exist in the role of alternating load.


When the hydraulic system is working, the hydraulic pipe to withstand the high pressure, coupled with the pressure instability caused by the alternating stress, vibration and vibration generated by the equipment, assembly stress and other common role, so that the pipe in the material defects , Corrosion or damage at the site of the stress concentration phenomenon, the pipeline fatigue damage broken and oil spills. For the rubber pipe will be from the high temperature, high pressure, bending, twisting serious place aging, hardening and cracking, the last tubing blasting and oil spills.