Category Archives: Technology

13 Aug

The ABCs of Concrete Resistance

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Resistance of concrete is the ability of a material to maintain its properties for a long time: fire and heat resistance, cold resistance, resistance of concrete to chemically aggressive environment, water and gas, maintaining its performance when working in adverse environmental conditions without significant damage and destruction. The article is prepared in collaboration with Telling Company experts, a successful UK-based engineering enterprise, massively utilising hydraulic lime, lime mortar and concrete solutions in its projects.

Resistance factors in a nutshell

A particularly high expansion of concrete hardening occurs during the formation of calcium sulfoaluminate. Concrete corrosion can occur if there is moisture in the air, and various acid gases. For example, sulfur dioxide discharged from furnace boilers, locomotives or sets of certain chemicals combines with moisture in the air and water vapor to form sulfuric acid, which destroys the concrete as well as the free acid in aqueous medium. Processes of chemical corrosion of concrete can not be considered independently of the physical and physico-chemical processes occurring in the concrete under the influence of an aqueous or gaseous medium. A crucial impact, in particular, has a three-dimensional deformation, resulting moisture exchange (absorption of water and its evaporation), the process of freezing and thawing, seepage and water filtration, diffusion processes, moving moisture in concrete, and so on. Read More

31 Mar

Magnetic Cranes and Grab Cranes

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Magnetic cranes are referred to a special type and designed for lifting and transporting ferromagnetic materials (scrap metals, chips, sheets, molds for casting and so on). These cranes are equipped with cargo electromagnets, hung on a hook suspension or traverse (on a floppy or hard suspension) located in the longitudinal or transverse direction of the bridge.

Magnetic cranes production is a prerogative of large scale businesses: the United Kingdom example is Granada Material Handling, a prosperous company with 14 years of track record, focusing on production, as well as lifting equipment inspection and lifting equipment services. The company’s pipeline gives birth to a variety of magnetic equipment types: here is a specifications breakdown (approximate data, the average values and serial production machines are considered).

  • Lifting capacity: 5 to 40 tons.
  • Lifting speed: 14-20 m/min.
  • Trolley crane speed: 70-120 m/min.

The most common among these cranes are the systems with single wall beams and auxiliary farms, as well as double-girder box-like structure with high resistance to fatigue.

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10 Oct

Sturdy Industrial Fittings: The Role Of Flanges

Fittings is a collective term for all the connective elements, installed in branching points, contractions and bends. These devices allow sealed blocking of traffic flow and, at the same time, simplify the process of assembling and disassembling the pipeline. A fitting may be made of metal or of softer materials; threaded, welded and tube fittings are the most common models, while flanges form a special group.

The article is kindly prepared by butt weld fittings UK manufacturing expert, Alexander Comley, a Birmingham-based firm with long years of successful experience under the belt.

The flange and its use

A true to type flange is a flat rectangular or round plate with holes for bolts throughout the perimeter. The main objective of the flange is ensuring strong and tight connection of pipes; flanges may also be used for connection of shafts and rotating parts. Flanges are produced in different shapes and sizes, though they are always mounted in pairs. To ensure the reliability and tightness of the connection a gasket is installed between the flanges. The shape and type of gasket, which is laid between the flanges depends on the pressure the pipeline is designed to deal with. Flat gaskets are used at a low pressure up to 4 MPa, while metal or asbestos pads are installed to withstand pressure up to 20 MPa. From time to time the seals are needed to be changed.

Flanges manufacturing technologies

Basically, there are three ways to produce steel flanges. In the first case, the flange is produced by hot stamping. A more innovative method of producing stainless steel flanges, practiced at AlexanderComley facilities, is gas cutting. Some flanges are made through bending and welding steel bands. Each method dramatically influences the quality of the final product and the cost of the finished flange respectively. However, much depends on the form needed to be delivered: thus, bespoke flanges of sophisticated forms demand pretty much technological effort to be manufactured; thus, e.g. tube sheet production, as claims Birmingham-based firm, one of the most resource-intensive processes. Read More

27 Jun

The Importance Of Decent Parking Ventilation Explained

An installed Cyclone ventilator

Covered parking lots, multi-surface and underground parking sites represent the essential features of a modern urban landscape, ensuring the safety of vehicles. But not every car owner is aware about the security threats posed at these undeniably useful facilities.

Taking into account the fact that virtually any parking is primarily a substantial accumulation of cars in a confined space, there are two main points, constituting a menace to people and their vehicles to be noted:

  • The risk of emergence and rapid spread of fire (because each machine features a tank with a non-zero amount of gasoline)
  • the risk of poisoning the owners and passers-by with monoxide from vehicles’ emissions

Therefore, the business plan of indoor (and primarily multilevel) lots should include the availability of sufficiently powerful ventilation and smoke detection mechanisms that can continuously provide the required ventilation. Of course, such internal engineering systems, structures and networks increase the cost of construction and maintenance of the car parking, but ultimately these systems increase the level of fire protection and environmental safety significantly.

In addition, no state supervisory authority responsible for environmental control will permit the exploitation of the facility without a decent installing car park ventilation system up and running, not to mention smoke protection mechanisms. In addition, such facilities should be used in full accordance with the rules of technical operation of the vehicle.

Another fact to underline is that the complexes put into operation decades ago are forced to integrate new parking ventilation systems according to standards adopted in the overwhelming majority of countries worldwide.

26 Jun

The Miraculous Glass Reinforced Concrete

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Glass reinforced concrete is fairly considered to be one of the most versatile building materials that stand in the service of modern architects and designers. The material production technology was developed over thirty years ago and since then glass reinforced concrete  has managed to establish itself as an indispensable tool and made ​​a significant contribution to the economy, technology and aesthetics of the building industry.

The material is comprised of several groups of elements: glass reinforced fiber is a collective term which includes a family of materials designed for a wide variety of purposes. Since its introduction in 1969, GRC has been implanted in global building practices around the globe, and now it is utilised by construction experts in 120+ countries.

In the years since the advent of GRC on the global construction market, the material has fully formed as a finest quality building component, plus the scope of its use has been significantly expanded.

Glass reinforced concrete has already firmly established in Europe (England, France, Germany), the United States, the countries of the Arab East, Japan and South East Asia (just remember the amazing Petronas Towers in Kuala-Lumpur), Australia and New Zealand.

The creation of the next-gen material was largely driven by the desire to improve the traditional concrete by improving its properties and thereby expanding its capabilities.

Admittedly, a major concrete disadvantage lies in its stone nature and low tensile strength. In reinforced concrete the weak point is partially eliminated by enabling metal fittings to deal with pressure. Dispersed reinforcement of concrete with fiberglass has a high tensile strength and significantly increases the strength of concrete stretching and bending.

05 Jun

Lighting Design Principles In A Nutshell

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Creating a smooth, uniform lighting theme with no abrupt transitions from light to shadow can be achieved through installing a number of smaller lights. Playing with tall pillars, combining lighting elements, bollards and built-in lighting fixtures, you can create a dynamic lighting system capable of covering the entire area: from the treetops and roofs of the cottage to the pool or flowerbeds. Street lighting experts are trying to cover all possible genres, offering lamps of country, Empire, Baroque, Art Nouveau and even Victorian street lighting styles. Therefore, the collections of the German, Italian and UK factories are typically represented by myriads of highly-functional lamps, suitable for the most intricate designs. Consider the option of acquiring forged fittings that resonates with lines and shadows and look stunningly beautiful. Just like in fashion industry, lighting design offers its own tendencies and trends virtually each season to complement the most exquisite terrace designs.

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02 Mar

The Latest Technological Advances in Ultrasonic Cleaning

automated-ultrasonic-cleaning-machines-52947-2639615As almost any prosperous industry, ultrasonic cleaning doesn’t stand still – the engineers are grinding away to integrate new methodologies and approaches into practice. Mentioned below is the list of noteworthy technologies that are not yet integrated on industrial level.

Reduced friction between the surfaces

An imposition of ultrasonic vibrations on the mating surfaces to reduce friction arising between them is an effect that can be used in the assembly of main units in which the parts are assembled with an interference, as well as to reduce scuffing and scratching of the surfaces of the mating parts.

A reduction in friction with the help of ultrasound has been successfully demonstrated in industrial trial installations of fuel rods in the fuel assembly skeleton. The trials show that the friction is reduced by 3-4 times.

Also, for example, an application of ultrasonic vibrations to the walls of the crystallizing dish reduces the friction, having a positive effect on the surface quality of the workpiece, reduces wear of the crystallizing dish surfaces (copper or graphite plates and bushings), plus considerable energy savings are achieved due to load reduction on engine.

Free-flowing materials sealing and compressing

Ultrasound promotes densification of free-flowing materials. This property can be used effectively to seal the powders during their compaction. Due to this, the molded product acquires a more uniform structure and its internal defects (cracks and sink) are eliminated, while the level of hardness is increased.

Metal parts hardening

Metal parts hardening by means of ultrasound, where protrude steel balls with a diameter of 0.4 to 2 mm act as reinforcing elements is another reasonable processing method. An ultrasonic transducer transmits pulses to the balls that make them move randomly within a specific hub and strike the surface of the part subjected to hardening with high frequency.

Metals mixing

The method is utilized for aluminum, cadmium, iron, zinc, bronze, graphite and many other alloys production. For example, mixing aluminum with lead improves the processability of the aluminum molding.

The innovators

Looking for a reliable, innovative partner to cooperate with in ultrasonic cleaning? Contact the guys from Hilsonic – the company that concentrates its effort on brand-new ultrasonic techniques will certainly not leave you indifferent.

28 Feb

The Difficulty Of Bitcoin Mining Explained

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The difficulty of mining process grows as more effort is spent on mining and more bounty hunters join the race. Initially, having a home PC was enough to plunge in Bitcoin mining, then savvy mining gurus moved to utilizing the computing power generated by top gaming graphics cards, but finally the niche has was occupied by digital miners – the devices designed for mining purposes exclusively. At first miners were produced basing on reprogrammed chips, but not so long after application the units based on specific integrated circuits, ASICs, characterized by stunning performance and relatively low power consumption hit the shelves.

For example, the power of a single graphics card Radeon HD 7990 (Nvidia’s solutions are mainly not suitable for mining) equals 1.2 GHs per second at a few hundred watts of energy consumption, while a modern ASIC device, e.g. System Red Fury priced at $125 generates 2.5GHs per second and consumes as little as 2.5 watts. Modern mining implies using ASIC devices, otherwise the affair is commercially unprofitable. Alternatively, one can purchase the necessary amount of GHs via special platforms, e.g. CEX.IO.

Once the miner is purchased the operational expenses are overwhelmingly represented by electricity bills in exchange for Bitcoins. The cost of mining a single Bitcoin may vary from $30 to $600, depending on the equipment used and electricity tariffs. In 2011, buying a top gaming card for mining paid off in about two weeks, but with the growing complexity of the calculation to produce Bitcoins the method is almost useless.

bitcoinMining pool concept

Therefore, miners began to gather in the pools that combine several tens, hundreds or thousands of miners in a single unit: in the case the unit is discovered and mined its share is distributed in accordance with the size of the contribution to the common cause. The system perceives the pool as a miner, producing hundreds of GHs per second, but in practice it is a main server, distributing tasks to miners included in its pool. Unlike solo mining, pool mining generates cash pretty quickly, but in relatively small portions.

In recent months, the media began to cover more and more stories about the unique Bitcoin farms, the largest of which are located in Hong Kong. November, 25 was the launch date of the factory with hardware cooled with liquid cooling, the capacity of which amounted to 4% of the total power in the network or 35 THs per second. It produces about 26 Bitcoins per day, which at the time of writing is equal to tens of thousands of dollars. In April 2013, Kaspersky Lab reported the discovery of a trojan that secretly turns users’ computers in Bitcoin generators.