Ultrasound Applied: Understanding The Nature Of Contamination

Among the processes occurring in liquid media with ultrasound, cleaning the surface of solids in the ultrasonic medium is successfully applied in numerous industries. Ultrasound is widely taken advantage of for cleaning steel belt, filters, injectors, aluminum or copper wires, cables, etc. Introduction of ultrasonic oscillations in the washing solutions can not only speed up the cleaning process, but also guarantee higher efficiency of cleaning. Due to technical detergent-soluble compounds used in the process of cleaning eliminated are flammable and toxic organic solvents, which undoubtedly leads to improved working conditions, improves the culture of production, and also allows to partially solve the issues of environmental safety.

The effectiveness of ultrasonic cleaning depends on the choice of a variety of parameters, including and physico-chemical properties of the liquid detergent. For right choice of solutions must also consider the nature of the contamination: the degree of adhesion to the surface to be cleaned, the chemical interaction with the detergent solution, the ability to withstand loads microshock (cavitation resistance).

Given the nature of the contamination and the nature of their relationship with the surface the following main types of pollution are distinguished:

  • inorganic contaminants, mechanically coupled with the surface (dust, sawdust, shavings of metallic and nonmetallic, carbon black, and so on);
  • strongly adherent to the surface mechanically materials (abrasive grains, particles of mineral or metal);
  • deposited on the surface (salt cake after treatment in salt baths, scum and so on) – all these types of contamination could be removed due to ultrasonic cleaning equipment.

In industrial use actual the problem of removing pollution of organic nature remains actual, and this is where of the coating or resin bonds mechanically weakly coupled with the surface (dust, sawdust and shavings plastic, carbon black, coal, coke); having a small degree of adhesion to the surface (grease and oil film and lubricants, grinding, polishing and lapping pastes); firmly grip (lacquers, resins, adhesives, paints and enamels).

Dirt film chemically bonded to the surface (oxides, salts and salt-like compounds, including rust and corrosion products) is another problem faced by engineers. To speed up the process of cleaning complex equipment is typically integrated into assembly lines. Nowadays the UK market is oozing with decent leasing options, e.g. Hilsonic Company, a noteworthy manufacturer of ultrasonic cleaners, provides over 20 beneficial contract options.

During the purification process the contaminants properties should be considered: their physical state (liquid or solid, liquid viscosity and the melting point of solid residues); nature of the relationship with the surface contamination of products (polar or non-polar); polymerization degree of pollution in the work components parts at high temperatures (during drawing, stamping, forging and the like. n.); and the presence of small solid particles which fill the grooves, blind and through holes; conglomeration of corrosion products and oxidation pollution.

The most common types of production for most of the dirt and oil are the combination of oil-based contaminants, polishing pastes, inorganic contamination in the form of dust particles, and mechanical, corrosion products, oxides, oxide films. (more…)

Transportation Processes From Within: Gantry Hoists

The intensive development of container transportation vehicles, rail, river and sea transport led to the creation of special materials handling equipment performance, in particular gantry cranes Rail mounted able to perform operations on the movement of goods from one mode of transport to another, taking into account their relative position overload on one area.

Gantry cranes represent the systems of continuous cyclic operation. Nowdays models are largely designed for lifting equipment for handling medium and large-capacity containers of various types and capacities. One of the most important features of container gantry cranes is definitely the ability to cover the large transshipment and storage space, which paved driveways to different modes of transport, road and railway ones. Cranes of this type are mainly used in the terminals with a large turnover rate of handling rail, road, sea, river containers, as well as on container platforms of industrial warehouses. Gantry hoists are equipped with a variety of lifting devices: manual, semi-automatic and automatic operation types.

Gantry container cranes

The cranes are typically offered with no console, one or two consoles, and to work in seaports – lifting console options. Sometimes such valves are mounted on the deck of the vessel, in which case they are called container ship cranes. Such devices are equipped with container ships with one purpose – to load and unload containers regardless of port facilities. These cranes have a bridge with folding consoles or without them. The portal is moved on the deck over the rails. The crane is equipped with a support or trolley corner, often having a swinging boom that allows operation without consoles.

At transfer points (sites) with a low turnover rate container handling gantry cranes are used hoisting capacity of 8 – 10 tons. The capture and release of containers is made using slings and other accessories, such as universal truck frames, made in the form of cross-arms, essential when dealing with containers deformed.

On platforms equipped with multiple gantry cranes 12.5 tons each, containers weighing up to 20 tonnes gross in co-operation of the two cranes can be handled. In this case, the device for gripping the container (manual or automatic) hung on the hooks of the cranes.

The complex crane equipment rail excavators for loading of large containers can be divided into two groups:

  • Rail gantry cranes for railway stations and industrial plants with capacity of 20 tons or more;
  • Shore cranes for sea and river port capacity up to 32 tons.

As for the production businesses, one of the most successful gantry hoist and overhead cranes manufacturers in the UK is Granada Material Handling, the company with an impressive track record in machinery industry. A seasoned player is known for its ambitious projects with Bentley, Airbus, Siemens and Nissan projects (and that’s just a few examples). Apart from standard equipment GMH provides an opportunity to create the gantry hoist as a custom solution that still meets unsurpassed safety, performance and cost-efficiency standards. (more…)