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WO1982003260A1 - Groupes electrogenes - Google Patents

Groupes electrogenes Download PDF

Info

Publication number
WO1982003260A1
WO1982003260A1 PCT/GB1982/000085 GB8200085W WO8203260A1 WO 1982003260 A1 WO1982003260 A1 WO 1982003260A1 GB 8200085 W GB8200085 W GB 8200085W WO 8203260 A1 WO8203260 A1 WO 8203260A1
Authority
WO
WIPO (PCT)
Prior art keywords
power unit
unit according
generator
motor
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1982/000085
Other languages
English (en)
Inventor
Machine Co Ltd Wultex
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wultex Machine Co Ltd
Original Assignee
Wultex Machine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wultex Machine Co Ltd filed Critical Wultex Machine Co Ltd
Priority to AU82027/82A priority Critical patent/AU8202782A/en
Publication of WO1982003260A1 publication Critical patent/WO1982003260A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/04—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/12—Flameproof or explosion-proof arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • This invention relates to electrical power units, and is particularly although not exclusively concerned with electrical power units that are suitable for use in hazardous environments, such as, for example, in underground mining.
  • Lighting systems that have been adopted in mining environments do tend to have a number of inherent problems.
  • previously proposed wholly electrical systems have the disadvantage that a high voltage source is required near the point of use, and bulky transformers and converter units are required at frequent intervals along.the power distribution system. It is possible only to run five single lamps each of seven watts output from one converter, and it is possible only to run a seven metre length of cable from each converter to each single lamp unit (thus limiting the positional capability of each lamp, with respect to the converter source).
  • there are numerous cables required which can be severed and. cause shock or sparking, the cables carrying live current at 110/125 volts.
  • Such wholly electrical systems require a high consumption of electrical power, and for transmission of power over 200 metres or more, there is inefficient striking of the lamps, due to power drop.
  • lamp units that are driven by pneumatic power, which power is converted to electrically energy by a generator within the lamp unit.
  • the generators tend to be very bulky, causing the individual lamp units to be bulky, and only single lamp units are available, of relatively poor lighting capability.
  • Preferred embodiments of the present invention aim to overcome these disadvantages, by providing reliable lighting units that may be used safely in hazardous conditions.
  • the invention generally is of wider application.
  • an electrical power unit comprising an hydraulic motor and an electric generator arranged to be driven by the motor, characterised in that said motor and said generator are each disposed within a flameproof housing.
  • power units in accordance with the. invention can be designed to be safe for use in hazardous areas - e.g. where there is a risk of cable severance or explosive gas. Then, severance of an hydraulic pipe can be of relatively minor consequence.
  • means is provided for blocking flow in an hydraulic pipe supplying a power unit in accordance with the invention, in the event of a loss in pressure greater than a predetermined value, as may occur, for example, in a pipe fracture.
  • Figure 1 is an hydraulic flow diagram of a lighting system embodying the invention
  • FIG. 2 is an electrical circuit diagram of a lamp unit embodying the invention
  • Figure 3 shows one example of a lamp unit, in cross-section
  • Figure 4 shows another example of a lamp unit, in cross-section
  • Figure 5 shows, in plan view, a coal face provided with a lighting system embodying the invention
  • Figure 6 shows the coal face in front elevation
  • FIGS 7, 8 and 9 show lamp units fitted to respective roof supports or shields as seen respectively on the lines C-C, B-B and A-A of Figure 5;
  • Figure 10 is a perspective view of one example of a lamp unit as used in Figures 5 to 9;
  • Figure 11 is a perspective view of another example of a lamp unit.
  • Figure 12 is a circuit diagram of a current limiting circuit of the lamp unit of Figure 11.
  • the lighting system illustrated in Figure 1 is suitable for use in underground mining, where it can be used with relative safety.
  • the system comprises a reservoir 1 of hydraulic fluid, and a pump 2 which is arranged to be driven by a motor 3.
  • the motor 3 can be an any suitable prime mover, such as/electric or diesel motor, and may be of 40 horse power or less.
  • the pump 2 is arranged to pump hydraulic fluid around the system at a rate of 27.5 gallons per minute, at a pressure of about 1600 P.S.I.
  • a relief valve assembly 6 is provided between flow and return lines 4 and 5, to relieve excess pressure in the system.
  • parts 1 to 6 thus described afford an hydraulic fluid supply system, having flow and return ports 7 and 8.
  • an hydraulic distribution system having flow and return pipes 9 and 10 is connected to the ports
  • each tee is provided with a respective non-return valve
  • a respective lamp unit 14, 15 etc. is connected between each pair of tees 11, 12 etc., via the one-way valves 13.
  • FIG. 2 is an electrical circuit diagram showing one example of a laxqp unit 14.
  • the lamp unit 14 comprises an hydraulic motor 16, through which hydraulic fluid passes via flow and return lines 17 and 18.
  • the output shaft of the hydraulic motor 16 is connected to an electric generator 19 by means of a flexible coupling 20.
  • the output of generator 19 is regulated by a regulator 21, and is fed to three ballast units 22, in parallel.
  • Each ballast unit 22 supplies a respective fluorescent tube 23.
  • the hydraulic motor may be of approximately 1 ⁇ 3 horse power rating, and have a drive speed in the range 800 to 2000 r.p.m.
  • the generator 19 may be a 12 volt - 60 watt DC dynamo.
  • Ballast units 22 and fluorescent tubes 23 may be of about 8 watts rating.
  • FIGs 3 and 4 show alternative examples of construction of a lamp unit 14.
  • the flow and return hoses 17 and 18 make connection at one end of a housing 24, to the hydraulic motor 16.
  • the hydraulic motor 16, coupling 20 and electric generator 19 are all mounted in one section of the housing 24, and the regulator 21, ballast 22, and tubes 23 are mounted within another section of the housing 24.
  • the housing 24 is sealed by a cover 25, in a flameproof and fluid-tight manner.
  • a fluorescent tube 23 extends perpendicularly to the axis of the generator 19, rather than parallel to it.
  • a glass 26 which seals the housing 24.
  • the electrical circuitry may be sunk within epoxy resin gel, to protect components from shock load or external vibration transmitted from local machinery, etc.
  • the hydraulic fluid may comprise exclusively oil, or of an emulsion of 60/40 or
  • the hydraulic fluid may be water alone.
  • the hydraulic supply system may be sufficient to light 100 lamp units spaced over a distance of 200 metres. Within each lamp unit such as 14, it is possible to light either 10 six inch fluorescent tubes, each 4 watt; 5 twelve inch flu ⁇ escent tubes, each 8 watt; 4 twenty-one inch fluorescent tubes, each 12 watt, or 2 tungsten spotlight units, each 25 watts. Each lamp unit has no external electric circuitry, and operates on very low voltage - for example, 18 volts maximum across each fluorescent tube.
  • Each lamp unit such as 14 may be a hand held inspection lamp, or may be designed for securement to a surface. Lamp units such as 14 may be fitted into any existing type of equipment which has a suitable hydraulic fluid system incorporated therein. In the system shown in Figure 1, each lamp unit 14, etc, may be removed safely from the system without switching off the other lamps in the system. Also, each lamp unit 14 is so designed as to allow any one light within that unit to fail whilst the others within the unit remain lit.
  • Figures 5 to 9 show how a lighting system as illustrated in Figure 1 may be installed at a coal face.
  • a plurality of roof supports and/or roof shields 27 is arranged across a coal face 28, and at face ends 29.
  • Various mining machinery is installed at the coal face, although this machinery is not shown in detail.
  • Coal mined from the face 28 is carried away on a stage loader conveyor 30, at the main gate 31 to the face 28.
  • An hydraulic pressure-fluid supply system such as that shown in Figure 1 (parts 1 to 6) is mounted on the stage loader.
  • a lamp unit 32 (equivalent to the lamp units 14, 15, etc) is mounted on each of the roof supports 27, and is connected to flow and return pipes supplied by the hydraulic pressure-fluid supply system 33. Each lamp unit 32 is arranged to light both the gallery 34 and the coal face 28.
  • a face conveyor 40 conveys coal from the face 28 to the stage loader conveyor 30.
  • FIG 10 illustrates one example of lamp units 32.
  • Each lamp unit 32 has a totally sealed flameproof housing 35.
  • flow and return ports 36 and 37 which lead to an hydraulic motor and electrical generator within the housing 35.
  • At one side 38 of the housing 35 there are mounted two fluorescent tubes which are arranged to project light downwardly, as shown by the arrow A.
  • At an opposite side 39 of the housing 35 there are mounted three fluorescent tubes, which are respectively arranged to project light horizontally, obliquely downwardly, and vertically downwardly, as shown by the arrows B, C and D.
  • the housing 35 is arranged to be secured to the canopy of a roof support 27, as shown in Figures 5 to 9, such that the two tubes at the side 38 of the housing 35 project light downwardly into the gallery 34, whilst the three tubes at the opposite side 39 project light into the coal face 28.
  • an hydraulic fluid distribution system may be supplied with tees such as 11 and 12 at any desired intervals, such that inspection lamp units or semi-permanent lamp units may be connected thereto.
  • the hydraulic pressure-fluid supply system is provided with means for blocking flow in the flow and return pipes, in the event of a loss in pressure greater than a predetermined value, as may occur, for example, in a pipe fracture.
  • a loss in pressure greater than a predetermined value
  • lamp units in accordance with the invention may be provided integrally on apparatus which has its own suitable supply of hydraulic pressure-fluid, such as, for example, a powered roof support.
  • a powered roof support such as, for example, a powered roof support.
  • each housing 24 may contain any desired electrically driven device or apparatus.
  • each housing 24 may be provided with electric terminals for connection to electrically driven apparatus.
  • Such units may advantageously provide an electrical supply at low voltage, in a safe and convenient manner.
  • the two hydraulic fluid distribution systems are preferably interlaced in a lighting system. Then, in the event of failure of one of the distribution systems, only a portion (e.g. a half) of the lights in the lighting system may be extinguished. This is particularly advantageous from the aspect of safety.
  • the alternative lamp unit 40 which is shown in Figure 11 comprises an hydraulic motor 41 and an electric generator 42, each of which is disposed within its own flameproof housing, which housings are bolted one to the other. Flow and return hoses 43 and 44 are connected to the hydraulic motor 41. A current regulator 45 is disposed in its own flameproof housing, which is secured directly to that of the generator 42. In the illustrated example, five fluorescent light units 46 are connected by respective cables 47 to the regulator 45.
  • the hydraulic motor 41, generator 42 and regulator 45 are all arranged in a completely flameproof manner, providing a high degree of safety.
  • the cables 47 are connected to the regulator 5 by conventional gland type connectors, and the regulator 47 includes a current limiter circuit to ensure that the current flowing through the cables 47 cannot exceed 0.7 amps, to ensure that the cables 47 and light units 46 are "intrinsically safe". Limiting the current in the cables 47 to 0.7 amps ensures that any sparking cannot be sufficiently strong to cause an explosion in an atmosphere of methane.
  • the regulator 45 may be connected to the generator 42 by a flexible electric cable, which again will be
  • Figure 12 shows one example of a current limiter circuit 50, such as may be used in the regulator 45 of Figure 11.
  • the current limiter 50 has supply input terminals V+ and V-, across which a Zener diode ZD1 and a resistor R2 are connected in series.
  • a further resistor R1 is connected between the junction point of the resistor R 2 and Zener diode ZD1 and a control electrode of a Thyristor TH1, which is connected across the supply rails.
  • Zener diode action will take place, as described above, to cause the Thyristor TH1 to conduct.
  • the illustrated circuit 50 offers a good degree of current overload protection, against both current and voltage surges, with a very rapid initial reaction time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

Groupe electrogene particulierement indique pour une utilisation dans des isolations de mines souterraines, ou les risques d'explosion sont particulierement eleves. Un generateur electrique (42) est entraine par un moteur hydraulique (41), les deux etant loges dans un boitier etanche au feu. Un regulateur (45) comprend des circuits permettant de limiter le courant produit par le generateur (42), et des unites de lumieres fluorescentes (46) sont connectees au regulateur au moyen de cables (47). Le moteur hydraulique (41) peut etre relie avantageusement directement au circuit hydraulique d'une machine de mine telle que, par exemple, un dispositif a moteur de support de ciel. Le groupe electrogene et les unites d'eclairage peuvent etre loges integralement a l'interieur d'un dispositif a moteur de support de ciel, afin de permettre l'eclairage d'un front de taille, d'une maniere sure et fiable.
PCT/GB1982/000085 1981-03-12 1982-03-12 Groupes electrogenes Ceased WO1982003260A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU82027/82A AU8202782A (en) 1981-03-12 1982-03-12 Electrical power units

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8107844 1981-03-12
GB8107844810312 1981-03-12

Publications (1)

Publication Number Publication Date
WO1982003260A1 true WO1982003260A1 (fr) 1982-09-30

Family

ID=10520348

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1982/000085 Ceased WO1982003260A1 (fr) 1981-03-12 1982-03-12 Groupes electrogenes

Country Status (5)

Country Link
EP (1) EP0073785A1 (fr)
CA (1) CA1185321A (fr)
GB (1) GB2113015B (fr)
WO (1) WO1982003260A1 (fr)
ZA (1) ZA821685B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990002436A1 (fr) * 1988-08-24 1990-03-08 Thomas Mcginn Systeme d'alimentation electrique pour charges electriques faibles
EP0617226A1 (fr) * 1993-03-23 1994-09-28 SIRAGA S.A.(société anonyme) Carrousel pour le remplissage de bouteilles de gaz, comportant des moyens de production de courant électrique
US6568493B2 (en) * 2001-07-13 2003-05-27 Mark Joesph Parkert Skid-steer loader power source attachment and method of manufacture
WO2014035373A1 (fr) * 2012-08-28 2014-03-06 Micro Motion, Inc. Boîtier résistant au feu comportant une fenêtre

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230392A (en) * 1989-02-04 1990-10-17 Ruder Oscar Younge Power supply system for use in a hazardous environment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2203867A (en) * 1938-01-12 1940-06-11 Luis G Legorreta Protective device for electric circuits
US3317792A (en) * 1964-03-20 1967-05-02 Westinghouse Electric Corp Load protection circuit
GB1215885A (en) * 1968-03-06 1970-12-16 Oldham & Son Ltd Improvements in or relating to lighting units for use with hydraulic equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2203867A (en) * 1938-01-12 1940-06-11 Luis G Legorreta Protective device for electric circuits
US3317792A (en) * 1964-03-20 1967-05-02 Westinghouse Electric Corp Load protection circuit
GB1215885A (en) * 1968-03-06 1970-12-16 Oldham & Son Ltd Improvements in or relating to lighting units for use with hydraulic equipment

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990002436A1 (fr) * 1988-08-24 1990-03-08 Thomas Mcginn Systeme d'alimentation electrique pour charges electriques faibles
US5289106A (en) * 1988-08-24 1994-02-22 Mcginn Thomas Electrical supply system for low current loads
EP0617226A1 (fr) * 1993-03-23 1994-09-28 SIRAGA S.A.(société anonyme) Carrousel pour le remplissage de bouteilles de gaz, comportant des moyens de production de courant électrique
FR2703132A1 (fr) * 1993-03-24 1994-09-30 Siraga Sa Carrousel pour le remplissage de bouteilles de gaz, comportant des moyens de production de courant électrique.
US6568493B2 (en) * 2001-07-13 2003-05-27 Mark Joesph Parkert Skid-steer loader power source attachment and method of manufacture
WO2014035373A1 (fr) * 2012-08-28 2014-03-06 Micro Motion, Inc. Boîtier résistant au feu comportant une fenêtre
KR20150047603A (ko) * 2012-08-28 2015-05-04 마이크로 모우션, 인코포레이티드 디스플레이를 갖는 난연성 하우징
CN104737632A (zh) * 2012-08-28 2015-06-24 高准公司 带显示器的防火外壳
US20150208538A1 (en) * 2012-08-28 2015-07-23 Micro Motion, Inc. Flameproof housing with display
AU2012388775B2 (en) * 2012-08-28 2015-12-17 Micro Motion, Inc. Flameproof housing with display
RU2602430C2 (ru) * 2012-08-28 2016-11-20 Майкро Моушн, Инк. Огнезащитный корпус с визуальным индикатором
US10225942B2 (en) 2012-08-28 2019-03-05 Micro Motion, Inc. Flameproof housing with display
US10779429B2 (en) 2012-08-28 2020-09-15 Micro Motion, Inc. Method of forming a flameproof housing

Also Published As

Publication number Publication date
GB2113015B (en) 1985-06-05
EP0073785A1 (fr) 1983-03-16
ZA821685B (en) 1983-09-28
CA1185321A (fr) 1985-04-09
GB2113015A (en) 1983-07-27

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