The boom of the truck crane generally includes two parts: a main boom and a flyback boom. There are mainly two types of main booms of truck cranes. One is a truss structure boom welded by profiles and pipes, and the other is a box-type structure boom with various sections. With the development of truck mounted cranes, most of the main booms of truck-mounted cranes are now box-type structures, and only a few are trussed structures. The auxiliary arm function of the truck crane arm is that, when the height of the main boom can not meet the requirements, the auxiliary boom can be connected at the end of the main boom to achieve the purpose of lifting the object to a higher elevation. The jib's jib can only lift lighter objects. The sub-arm generally has only one arm, and there are also more than two folding or sub-arms, among which the foldable truss sub-arm is the most common. Sodium Tripolyphosphate, Na5P3O10, Molecular weight 367.86, white powder; Melting point 622 °C. free soluble in water, aqueous solution appears ACID. It has got salient chelating capacity to metal ions of Ca and Mg etc. and can soften hard water to make suspension into solution, alkalinity, without causticity. It is an inorganic compound with formula Na5P3O10, is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid.Sodium tripolyphosphate is produced by heating stoichiometric mixture of disodium phosphate, Na2HPO4, and monosodium phosphate, NaH2PO4, under carefully controlled conditions. Sodium Tripolyphosphate,Stpp Food Grade,Washing Powder Stpp,Detergents Preservatives Yucheng Jinhe Industrial Co.,Ltd , https://www.hncarbonblack.com
It has different bulk density, i.e. low density 0.35-0.6g/cm 3 , medium density 0.6-0.8g/cm3 and high density 0.8-1.0g/cm3. This product has two crystalline forms, namely phase I (high temperature phase) and phase II (low temperature phase). The chemical properties of the two phases are the same, and the difference between them lies in the thermostability, hygroscopicity, solubility and hydration heat when dissolving.
It can be used as one of the main auxiliaries for synthetic Detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.
As an oil contamination resistance agent in paper production; As in foodstuff industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. It may also serves as a softener or densifier in foodstuff industry.
Analyze the boom structure of the crane
The boom of truck-mounted crane is the most important part of the truck-mounted crane. The truck-mounted crane uses a pulley block at the top of the boom to support the hoisting wire rope to suspend heavy objects. The height and working radius are changed by using changes in the length and inclination of the boom. . Although the crane's boom is used to suspend and transport objects, different boom structures and technologies make the performance and efficiency of the crane very different.
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