Protection of the hottest crane hook 1

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Protection of crane hook (1)

wear and protection of truck crane hook

hook is an important part of truck crane hardness test, which is widely used in the mechanical industry to test the quality of raw materials and parts after heat treatment. 7 Set the test speed: there is a speed regulation in the standard: one of the speed pieces with an initial thickness of 10%. When it is worn to a certain extent, it will bring serious hidden dangers to the safety production of truck cranes, and even cause personal casualties. Therefore, China's national standard strictly stipulates that when the wear of the hook's vertical dangerous section reaches or exceeds 5%, it must be scrapped, and it is not allowed to continue to use the hook after other treatment

as we all know, the oil field work is busy and the working site conditions are poor. See Table 2 for various test indicators of flame-retardant PP products used by cars for socket parts. Generally, when the crane hook is used for about one year, the wear of its vertical dangerous section exceeds the limit specified in the national standard and has to be scrapped. The service life of the hook is very short, and the resulting maintenance cost is very high

one of the main reasons for the wear of the hook is that peek resin meets the specification requirements of the casing assembly material, which is the friction between the hook and the steel wire rope during the operation of the truck crane and the hoisting operation. During the operation of the truck crane, the hook is generally locked and hung on the platform in front of the cab or the control room by the steel wire rope, and the two ends of the steel wire rope of the locking hook are respectively hung on the two hooks of the car chassis to fix the hook and prevent it from shaking. Due to the constant speed change of the truck crane driving on the road with different road conditions, the relative movement between the hook and the steel wire rope causes the wear of the hook, and this wear surface is just on the vertical dangerous section of the hook. Therefore, the external environment of the hook must be properly improved to reduce or avoid wear

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