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Hydraulic Accumulator
A hydraulic accumulator is a pressure storage reservoir in which an incompressible hydraulic fluid is held under pressure that is applied by an external source of mechanical energy. The external source can be an engine, a spring, a raised weight, or a compressed gas.Although liquids are generally considered to be practically incompressible, gases may be compressed and this compressed gas is a convenient energy store. An accumulator enables a hydraulic system to cope with extremes of demand using a less powerful pump, to respond more quickly to a temporary demand, and to smooth out pulsations. It is a type of energy storage device. Compressed gas accumulators, also called hydro-pneumatic accumulators, are by far the most common type. Types of accumulators Towers The first accumulators for William Armstrong's hydraulic dock machinery were simple raised water towers. Water was pumped to a tank at the top of these towers by steam pumps. When dock machinery required hydraul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pressure
Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and even by industry. Further, both spellings are often used ''within'' a particular industry or country. Industries in British English-speaking countries typically use the "gauge" spelling. is the pressure relative to the ambient pressure. Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre (N/m2); similarly, the pound-force per square inch ( psi) is the traditional unit of pressure in the imperial and U.S. customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as of this. Manome ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Engine House, Bristol Harbour
The Hydraulic engine house is part of the " Underfall Yard" in Bristol Harbour in Bristol, England. The octagonal brick and terracotta chimney of the engine house dates from 1888, and is grade II* listed, as is the hydraulic engine house itself. It replaced the original pumping house which is now The Pump House public house. It is built of red brick with a slate roof and originally contained two steam engines made by the Worthington Corporation. These were compound surface condensing cylinders of diameter. These were replaced in 1907 by the current machines from Fullerton, Hodgart and Barclay of Paisley. It powered the docks' hydraulic system of cranes, bridges and locks until 2010. Water is pumped from the harbour to a header tank and then fed by gravity to the high pressure pumps, where it is pressurised thence raising the external hydraulic accumulator. This stores the hydraulic energy ensuring a smooth delivery of pressure and meaning that the pumps do not need to be ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canal & River Trust
The Canal & River Trust (CRT), branded as in Wales, holds the guardianship of 2,000 miles of canals and rivers, together with reservoirs and a wide range of heritage buildings and structures, in England and Wales. Launched on 12 July 2012, the Trust took over the responsibilities of the state-owned British Waterways in those two places. History The concept of a National Waterways Conservancy was first championed and articulated in the 1960s by Robert Aickman, the co-founder of the Inland Waterways Association, as a way to secure the future of Britain's threatened inland waterways network. The idea was revived by the management of British Waterways in 2008 in response to increasing cuts in grant-in-aid funding, a drop in commercial income after the financial crisis of 2007–2008 and growing calls by waterway users for a greater say in the running of the waterways. On 18 May 2009, launching 'Twenty Twenty – a vision for the future of our canals and rivers' on the terrace ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Docklands Development Corporation
The London Docklands Development Corporation (LDDC) was a quango agency set up by the UK Government in 1981 to regenerate the depressed Docklands area of east London. During its seventeen-year existence it was responsible for regenerating an area of in the London Boroughs of Newham, Tower Hamlets and Southwark. LDDC helped to create Canary Wharf, Surrey Quays shopping centre, London City Airport, ExCeL Exhibition Centre, London Arena and the Docklands Light Railway, bringing more than 120,000 new jobs to the Docklands and making the area highly sought after for housing. Although initially fiercely resisted by local councils and residents, today it is generally regarded as having been a success and is now used as an exemplar of large-scale regeneration, although tensions between older and more recent residents remain. Reason for creation London's Docklands were at one time the largest and most successful in the world. Starting with West India Docks in 1802, East India Docks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London And Blackwall Railway
Originally called the Commercial Railway, the London and Blackwall Railway (L&BR) in east London, England, ran from Minories to Blackwall via Stepney, with a branch line to the Isle of Dogs, connecting central London to many of London's docks. It was operational from 1840 until 1926 (for passengers) and 1968 (for goods), closing after the decline of inner London's docks. Much of its infrastructure was reused as part of the Docklands Light Railway. The L&BR was leased by the Great Eastern Railway in 1866, but remained independent until absorbed into the London and North Eastern Railway at the 1923 Grouping. Another branch was opened in 1871, the Millwall Extension Railway. History It was authorised by an Act of Parliament entitled ''An Act for making a Railway from the Minories to Blackwall, with Branches, to be called "The Commercial Railway"'' dated 28 July 1836 in the reign of William IV. The length of the railway was to be . The engineer of the line was intended to be Jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signalling Control
On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and block systems to ensure that trains operate safely, over the correct route and to the proper timetable. Signalling control was originally exercised via a decentralised network of control points that were known by a variety of names including signal box (International and British), interlocking tower (North America) and signal cabin (some railways e.g., GCR). Currently these decentralised systems are being consolidated into wide scale signalling centres or dispatch offices. Whatever the form, signalling control provides an interface between the human signal operator and the lineside signalling equipment. The technical apparatus used to control switches (points), signals and block systems is called interlocking. History Originally, all signaling was done by mechanical means. Points and signals were operated locally from individual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poplar Dock
Poplar may refer to: Plants *''Populus'', the plant genus which includes most poplars, as well as aspen and cottonwood ** Black poplar (''Populus nigra'') ** Carolina or Canadian poplar, '' Populus × canadensis'' ** Grey poplar (''Populus × canescens'') ** White poplar *** ''Populus alba'', native to Eurasia *** '' Populus grandidentata'', bigtooth aspen *** ''Populus tremuloides'', American aspen * ''Liriodendron'', the genus of tulip poplars ** Yellow poplar or tulip poplar (''Liriodendron tulipifera'') ** '' Liriodendron chinense'', Chinese tulip poplar Places ;Canada * Poplar, Ontario, a community in the township of Burpee and Mills *Poplar Creek, British Columbia, a ghost town ;United Kingdom * Poplar, London ** Poplar High Street * Metropolitan Borough of Poplar (1900–1965) * Poplar DLR station * Poplar (UK Parliament constituency) * Poplar and Limehouse (UK Parliament constituency) * Poplar Walk, Christ Church Meadow, Oxford ;United States * Poplar, California ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limehouse Basin
Limehouse Basin is a body of water 2 miles east of London Bridge that is also a navigable link between the River Thames and two of London's canals. First dug in 1820 as the eastern terminus of the new Regent's Canal, its wet area was less than originally, but it was gradually enlarged in the Victorian era, reaching a maximum of double that size, when it was given its characteristic oblique entrance lock, big enough to admit 2,000- ton ships. Throughout its working life the basin was better known as the Regent's Canal Dock, and was used to transship goods between the old Port of London and the English canal system. Cargoes handled were chiefly coal and timber, but also ice, and even circus animals, Russian oil and First World War submarines. Sailing ships delivered cargoes there until the Second World War, and can be seen in surviving films and paintings. The dock closed for transshipment in 1969 and eventually passed into disuse. Following closure of the basin and much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Roman Empire, Romans as ''Londinium'' and retains its medieval boundaries.See also: Independent city#National capitals, Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national Government of the United Kingdom, government and Parliament of the United Kingdom, parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the Counties of England, counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tower Bridge
Tower Bridge is a Grade I listed combined bascule and suspension bridge in London, built between 1886 and 1894, designed by Horace Jones and engineered by John Wolfe Barry with the help of Henry Marc Brunel. It crosses the River Thames close to the Tower of London and is one of five London bridges owned and maintained by the Bridge House Estates, a charitable trust founded in 1282. The bridge was constructed to give better access to the East End of London, which had expanded its commercial potential in the 19th century. The bridge was opened by Edward, Prince of Wales and Alexandra, Princess of Wales in 1894. The bridge is in length and consists of two bridge towers connected at the upper level by two horizontal walkways, and a central pair of bascules that can open to allow shipping. Originally hydraulically powered, the operating mechanism was converted to an electro-hydraulic system in 1972. The bridge is part of the London Inner Ring Road and thus the boundary of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristol Harbour
Bristol Harbour is the harbour in the city of Bristol, England. The harbour covers an area of . It is the former natural tidal river Avon through the city but was made into its current form in 1809 when the tide was prevented from going out permanently. A tidal by-pass was dug for 2 miles through the fields of Bedminster for the river, known as the "River Avon New Cut", "New Cut", or simply "The Cut". It is often called the Floating Harbour as the water level remains constant and it is not affected by the state of the tide on the river in the Avon Gorge, The New Cut or the natural river southeast of Temple Meads to its source. Netham Lock at the east end of the 1809 Feeder Canal is the upstream limit of the floating harbour. Beyond the lock is a junction: on one arm the navigable River Avon continues upstream to Bath, and on the other arm is the tidal natural River Avon. The first of the floating harbour, downstream from Netham Lock to Totterdown Basin, is an artificial canal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bar (unit)
The bar is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa (100 kPa), or slightly less than the current average atmospheric pressure on Earth at sea level (approximately 1.013 bar). By the barometric formula, 1 bar is roughly the atmospheric pressure on Earth at an altitude of 111 metres at 15 °C. The bar and the millibar were introduced by the Norwegian meteorologist Vilhelm Bjerknes, who was a founder of the modern practice of weather forecasting. The International System of Units, despite previously mentioning the bar, now omits any mention of it.. The bar has been legally recognised in countries of the European Union since 2004. British Standard BS 350:2004 ''Conversion Factors for Units''. The US National Institute of Standards and Technology (NIST) deprecates its use except for "limited use in meteorology" and lists it as one of several units that "must not be i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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