In the hydraulic hose clamp system, whether it is a metal pipe joint or a hydraulic hose clamp joint, there is a problem of easy leakage. For ferrule type pipe joints, most of the pipes are subjected to greater external force or impact, which causes the ferrule to loosen or the end of the pipe deforms to cause leakage. At this time, check whether the ferrule is out of round, the cutting edge is defective, and the pipe end is Intact and the compression degree of the ferrule nut, etc., while eliminating the external force of the pipe. For flared pipe joints, mostly due to excessive flaring, substandard quality or multiple disassembly, resulting in flaring deformation or cracks, etc., causing leakage. At this time, the front end can be cut off and flared again.
If the male and female cone top pressure is used for sealing, the leakage is mostly due to the damage of the two cone surfaces. The cone surface can be ground with abrasive sand. In some occasions where the "о" ring is sealed by the end face or outer diameter, the leakage causes are as follows: the "о" ring is aging or deformed to cause leakage; the "о" ring is not assembled in place to connect the two planes When the pressure is uneven or the “о”-shaped ring is cut to cause leakage; the “о”-shaped ring is not compacted and the amount of elastic deformation is insufficient to cause leakage; the “о”-shaped ring is too deep to cause leakage.
In this regard, it is necessary to re-select the "о" ring with the same outer diameter and thicker cross-section, or cut or grind the sealing surface with the spigot groove to reduce the depth of the spigot groove to make the "о" The ring has sufficient elastic deformation. For leaks at pipe joints using oil-resistant rubber sheets, wool felt, soft steel cardboard, combined sealing gaskets or sealants, no matter what the material is, the seals should be checked for damage, deformation, aging, and excessive roughness. , And then take corresponding measures.
Pipeline layout requirements of hydraulic hose clamps: The pipelines of hydraulic hose clamps should try to avoid high or low temperatures such as high-temperature radiation and cooling water spray, especially hydraulic hose clamps; pipe layout should not affect the host The operation of the equipment should be safe and reliable, convenient for work, observation, and maintenance; the pipe should be horizontal and vertical, neat and beautiful. Minimize bends or small-angle bends, and use large arcs to reduce oil flow resistance; when installation conflicts occur, small pipes should be used to allow large pipes and low-pressure pipes to high-pressure pipes; the pipes should not be in contact when they cross each other and should be separated by a certain distance ; The joints of the parallel pipelines should be staggered to avoid affecting the installation and disassembly; for easy disassembly and cleaning of the pipelines, flexible joints should be properly installed, but they should be used sparingly to reduce the possibility of leakage.
Determine the length of the pipe: According to the fixed piping path determined in 8.2, the length of the pipe shall be measured on the spot. Pay attention to the influence of the radius of the bend; take the influence of various hydraulic hose clamps into the pipeline into consideration ; The length of the pipe should be determined section by section, cut off, and pre-installed in order to facilitate site adjustment according to the actual situation. If it is cut all at once, piping will be difficult when accumulated errors occur; the cut short pipes should be used as much as possible for each short pipe. Where necessary, straight-through pipe joints can be used to extend the length if necessary, but the number of joints on the pipe section should not be too many.