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EP0108174A1 - Alarmes - Google Patents

Alarmes Download PDF

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Publication number
EP0108174A1
EP0108174A1 EP82305803A EP82305803A EP0108174A1 EP 0108174 A1 EP0108174 A1 EP 0108174A1 EP 82305803 A EP82305803 A EP 82305803A EP 82305803 A EP82305803 A EP 82305803A EP 0108174 A1 EP0108174 A1 EP 0108174A1
Authority
EP
European Patent Office
Prior art keywords
alarm
machinery
hydraulic pressure
pressure fluid
flow
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.)
Withdrawn
Application number
EP82305803A
Other languages
German (de)
English (en)
Inventor
Stuart Leonard Hill
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 EP82305803A priority Critical patent/EP0108174A1/fr
Publication of EP0108174A1 publication Critical patent/EP0108174A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/04—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using hydraulic transmission; using pneumatic transmission

Definitions

  • This invention relates to alarms, and is particularly although not exclusively concerned with alarms for use in underground mines.
  • Preferred embodiments of the present invention aim to provide alarm devices which may be improved in this respect.
  • an alarm device comprising an alarm and control means adapted to inhibit flow of hydraulic pressure fluid to machinery for a predetermined delay period after the alarm has been actuated, both the alarm and the control means being arranged to be actuated by hydraulic pressure fluid.
  • the alarm may be a visual and/or audible alarmo
  • the alarm may be electrically driven, the device including means for converting hydraulic pressure fluid energy to electrical energy, in the manner of the portable power units disclosed in our International Application No: PCT(GB 82/00085), to which the reader's attention is directed.
  • the alarm may be driven directly by hydraulic pressure fluid, as a siren, for example.
  • the alarm may be a continuous alarm or an intermittent alarm (e.g. providing pulses of light and or sound).
  • the device may be a self-contained unit, or may be incorporated into a machine to be controlled. In either case, the device is preferably housed in a flameproof and water proof housing.
  • control means further comprises an hydraulic cylinder having a spring-biassed piston therein, and said delay period is defined by the time taken for said piston to travel a predetermined distance under the influence of hydraulic pressure fluid and against said spring bias.
  • control means is arranged to build-up hydraulic pressure progressively in the device during said delay period, until the pressure reaches a limit value at which the control means responds to permit flow of hydraulic pressure fluid,to machinery to be controlled.
  • the control means preferably comprises at least one control valve operative to inhibit flow of hydraulic pressure fluid to machinery to be controlled during said delay period.
  • one control valve is operative to control a main flow of hydraulic pressure fluid to machinery to be controlled, and prevents such flow unless hydraulic pressure in the device exceeds a limit value, and at least one other control value is operative to control flow of hydraulic pressure fluid to parts of such machinery, and is controlled directly by said piston.
  • machinery powered and/or controlled by hydraulic pressure fluid in combination with an alarm device in accordance with the first aspect of the invention.
  • said machinery comprises mining machinery.
  • an alarm unit comprising a housing and, mounted within the housing, an electrically operable alarm, an hydraulic motor, and an electric generator which is arranged to be driven by the hydralic motor and is arranged to supply the alarm with electrical energy.
  • the alarm may be audible and/or visual.
  • the housing is preferably flameproof and waterproof.
  • the unit is portable.
  • it may be built into machinery (especially underground mining machinery), and/or may be arranged to emit an alarm signal prior to start-up of machinery.
  • the lighting system shown in Figure 1 comprises athydraulic fluid supply system 1, in which hydraulic fluid from a tank 2 is supplied under pressure by means of a pump 5 driven by a motor 4.
  • the pump 3 may be arranged to deliver hydraulic fluid at a rate of 3 gallons per minute, and the motor 4 may be a 3 horsepower motor.
  • An on/off valve 5 is provided for controlling the flow of hydraulic fluid from the supply system 1, and flow and return ports 6 and 7 are provided for making connections to the hydraulic fluid supply system 1.
  • Hydraulic fluid is supplied under pressure along a flow line 8 to a plurality of lamp units 10, and returned along a return line 90
  • the lamp units 10 are all arranged in parallel across the flow and return lines 8 and 9.
  • Each lamp unit 10 comprises an hydraulic motor, an electric generator driven thereby, and an electric lamp supplied with electricity from the generator.
  • the lighting system is essentially similar in operation to the systems disclosed in our co-pending Application referred to above.
  • An alarm unit 11 is also connected in parallel with the lamp units 10, between the flow and return lines 8 and 9.
  • One example of physical construction of the alarm unit 11 is shown in Figure 3, where the unit 11 is contained within a flameproof and waterproof housing 14. Fluid flow and return lines 12 and 13 are connected to the system flow and return lines 8 and 9 respectively, and lead into the housing 14. Mounted within the housing 14 are an hydraulic motor (not shown) and an electric generator (not shown), which are arranged to convert the energy of the hydraulic pressure fluid flowing along the lines 12 and 13 into electrical energy, in just the same manner as the lamp units 10. The electrical energy thus obtained is then applied both to an electrically operable audible alarm 15, and an electrically operable visual alarm 16.
  • the audible alarm 15 may preferably be an electric horn arranged to give either a continuous or intermittent sound, or an alternating two-tone sound.
  • the visual alarm 16 may comprise a lamp arranged to give either a continuous light or a flashing light, or the lamp may be arranged to rotate.
  • the alarm unit 11 gives both audible and visible warnings, for any desired period of time.
  • either only an audible alarm or only a visible alarm may be provided.
  • the audible alarm may be actuated directly by hydraulic fluid pressure, in the manner of a siren, for example. However, in an underground mining environment, this would not usually be preferred, as sirens are prone to clogging by dust and other foreign objects.
  • Figure 2 shows an example of a circuit diagram of an alarm device 18 when adapted for use with underground mining machinery to be controlled.
  • the alarm device 18 is connected in series with a main flow line 17 of the machinery.
  • Pressure fluid in the line 17 is arranged to flow in parallel to a spring operated sequence valve 19, a first restrictor valve 20, and a second restrictor valve 21.
  • the sequence valve 19 is so biased as to open only when the pressure of the fluid supplied thereto exceeds a predetermined limit value - for example 1,000 PSI.
  • a predetermined limit value for example 1,000 PSI.
  • the second restrictor valve 21 alows pressure fluid to flow therethrough more quickly than does the first restrictor valve 20. Consequently, pressure fluid flowing through the restrictor valve 21 passes through a subsequent spring operated pilot valve 22 into an alarm unit 11, which may be, for example, as shown in Figure 3. The alarm unit 11 then provides a visual and audible alarm.
  • valves 27 and 28 operate, via a cam mechanism (not shown), on two control valves 27 and 28. These valves act respectively on flow lines 29 and 30 to respective parts of the machinery (such as motors, cutters, etc.), and when the piston 25 is in its upper most position, the valves 27 and 28 are open to divert the flow of pressure fluid from the machinery parts to tank, thus inhibiting operation of those parts. When the piston 25 reaches its lowermost position, the valves 27 and 28 are closed, thereby enabling hydraulic fluid under pressure to pass to the machinery parts, which may then be operatedo
  • the illustrated alarm ; device 18 may be of immense value when used to control underground mining machinery. As soon as a start-up procedure of the machinery is initiated, the alarm device 18 is activated, and the alarm unit 11 provides both an audible and visual warning that the machinery is about to start. The machinery is then prevented absolutely from operating for a predetermined delay period, whilst pressure at the cylinder 24, and therefore at the flow port of the sequence valve 19, progressively builds-up. This delay can be as much as 45 seconds, which in most cases, can be ample for any person in a dangerous position (e.g. a maintenance worker in the vicinity of the work area of the machinery) to take evasive action.
  • a dangerous position e.g. a maintenance worker in the vicinity of the work area of the machinery
  • alarm devices 18 may be provided at regular intervals over the machinery, or at least in the vicinity of the dangerous areas thereof, to abort altogether operation of the machinery until a worker has been able to move to safety.
  • the alarm device 18 is especially safe and reliable in operation, as it has no external electrical connections whatsoever, its few electrical connections being housed together with the few electrical components within the sealed housing of the alarm unit 11.
  • the alarm device 18 is driven entirely by hydraulic power, it may nevertheless be readily incorporated into any electrical control or delay system, if required.
  • the maximum voltage occuning within the alarm unit 11 may be 12 or 24 volts DC.
  • the alarm device 18 may be used with any suitable hydraulic pressure fluid, such as wholly water, or wholly oil, or a water/oil emulsion (e.g. 60/40 or 95/5).
  • the alarm device 18 may either be custom designed to be an integral part of machinery to be controlled, or it may be used as a unit separate thereto.
  • the illustrated alarm device 18 is particularly advantageous for use in hazardous atmospheres, for example in gaseous environments which occur in mining, quarrying and chemical industries. However, it may be used in any other suitable situations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Emergency Alarm Devices (AREA)
EP82305803A 1982-11-02 1982-11-02 Alarmes Withdrawn EP0108174A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP82305803A EP0108174A1 (fr) 1982-11-02 1982-11-02 Alarmes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82305803A EP0108174A1 (fr) 1982-11-02 1982-11-02 Alarmes

Publications (1)

Publication Number Publication Date
EP0108174A1 true EP0108174A1 (fr) 1984-05-16

Family

ID=8189822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82305803A Withdrawn EP0108174A1 (fr) 1982-11-02 1982-11-02 Alarmes

Country Status (1)

Country Link
EP (1) EP0108174A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102536322A (zh) * 2011-12-26 2012-07-04 枣庄联创实业有限责任公司 矿用声光报警装置
CN103016062A (zh) * 2012-12-08 2013-04-03 三正集团股份有限公司 基于气缸式发电的瓦斯监测与照明两用系统
CN110155653A (zh) * 2019-06-14 2019-08-23 龙口矿业集团有限公司 一种转载机启动延时预警装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1430973B1 (de) * 1963-12-07 1970-08-06 Funke & Huster Elek Zitaetsges Akustische Warnvorrichtung fuer Einschienen-Haengebahnen im Bergbau unter Tage
DE2008669B2 (de) * 1970-02-25 1970-11-26 CEAG Concordia' Elektrizitäts-AG, 4600 Dortmund Warneinrichtung für Fördereinrichtungen, insbesondere Einschienenhängebahnen von Untertagebetrieben
US4110742A (en) * 1977-07-11 1978-08-29 Hawkins J C Alarm circuit
GB2079511A (en) * 1980-06-25 1982-01-20 Dale Mansfield Ltd Sound generator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1430973B1 (de) * 1963-12-07 1970-08-06 Funke & Huster Elek Zitaetsges Akustische Warnvorrichtung fuer Einschienen-Haengebahnen im Bergbau unter Tage
DE2008669B2 (de) * 1970-02-25 1970-11-26 CEAG Concordia' Elektrizitäts-AG, 4600 Dortmund Warneinrichtung für Fördereinrichtungen, insbesondere Einschienenhängebahnen von Untertagebetrieben
US4110742A (en) * 1977-07-11 1978-08-29 Hawkins J C Alarm circuit
GB2079511A (en) * 1980-06-25 1982-01-20 Dale Mansfield Ltd Sound generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102536322A (zh) * 2011-12-26 2012-07-04 枣庄联创实业有限责任公司 矿用声光报警装置
CN103016062A (zh) * 2012-12-08 2013-04-03 三正集团股份有限公司 基于气缸式发电的瓦斯监测与照明两用系统
CN110155653A (zh) * 2019-06-14 2019-08-23 龙口矿业集团有限公司 一种转载机启动延时预警装置

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19850117

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HILL, STUART LEONARD