EP0561317B1 - Explosionsgeschütztes Gerät, insbesondere Leuchte - Google Patents

Explosionsgeschütztes Gerät, insbesondere Leuchte Download PDF

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Publication number
EP0561317B1
EP0561317B1 EP93104140A EP93104140A EP0561317B1 EP 0561317 B1 EP0561317 B1 EP 0561317B1 EP 93104140 A EP93104140 A EP 93104140A EP 93104140 A EP93104140 A EP 93104140A EP 0561317 B1 EP0561317 B1 EP 0561317B1
Authority
EP
European Patent Office
Prior art keywords
switch
housing portion
actuating plunger
chamber space
actuating
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.)
Expired - Lifetime
Application number
EP93104140A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0561317A3 (enrdf_load_stackoverflow
EP0561317A2 (de
Inventor
Rudolf Brandel
Wilmut Görner
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.)
Cooper Crouse Hinds GmbH
Original Assignee
CEAG Sicherheitstechnik GmbH
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 CEAG Sicherheitstechnik GmbH filed Critical CEAG Sicherheitstechnik GmbH
Publication of EP0561317A2 publication Critical patent/EP0561317A2/de
Publication of EP0561317A3 publication Critical patent/EP0561317A3/de
Application granted granted Critical
Publication of EP0561317B1 publication Critical patent/EP0561317B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H9/042—Explosion-proof cases
    • 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
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
    • F21V25/04—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken breaking the electric circuit
    • 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

Definitions

  • the invention relates to an explosion-proof device, in particular a lamp, according to the preamble of claim 1.
  • a lamp is known from DE-A-1016607.
  • Luminaires that consist of a lower housing part and a transparent upper housing part (cover trough) have to be opened from time to time to replace the lamps inside.
  • a switch is required which has a "positive opening position switch for safety functions" based on VDE 0660, part 206, 10 / Must be 86, since explosion protection is also affected in addition to protection against accidental contact.
  • Such switches have an explosion-proof switching chamber into which a plunger engages in a manner that prevents ignition, which plunger is actuated by the gearbox or a coupling part connected to it. In the worst case, however, it is possible to turn the switch on even when the transparent cover trough is removed.
  • a plug pin is connected to the upper housing part as a plunger.
  • the plug pin connects two opposite contacts in the lower housing part when both housing parts are connected to each other. In this way, the corresponding switch in the lower part of the housing is closed and current can flow. Since the plug pin is guided in a gap in the lower part of the housing and within an insulated bushing in the upper part of the housing, the ignition protection against breakdown is guaranteed and until the switch is completely open, there is sufficient explosion protection.
  • the present invention has for its object to improve an explosion-proof device with the features of the preamble of claim 1 so that when the actuating plunger is removed, the contact pieces are forcibly isolated from one another and at the same time the bore for carrying out the actuating plunger is at least partially closed when the switch is open.
  • the partition in the switching chamber space ensures that this between the switching contacts, or fixed contact pieces and is simultaneously pressed against the wall of the switch housing upper part delimited in the region of the bore.
  • the partition covers at least part of the bore and in this way reduces the cross section.
  • the plunger For contacting, the plunger travels with its inner end located in the interrupter chamber between the fixed contact pieces and thus closes the circuit, whereby from the moment of contact when the plunger engages in the interrupter chamber, the ignition safety of the gap between the plunger and the inner wall of the associated bore is ensured.
  • a further advantageous embodiment of the invention can go that the switch chamber space is composed of a switch housing lower part and a switch housing upper part and that the switch housing upper part inserted into the switch housing lower part has the at least one bore which the actuating plunger has.
  • the fixed contact pieces with terminal-carrying terminal lugs on the switch housing upper part are fixed, the terminal lugs reaching through this.
  • the special design of the fastening of the actuating plunger with the upper housing part can be gathered from the characterizing features of claim 7.
  • An intermediate member can be provided between the actuating plunger and the upper housing part, on which the actuating plunger is locked, the intermediate member itself being locked to the upper housing part.
  • At least one extension is provided on the intermediate member according to the characterizing features of claim 9, which extension can engage in a suitable opening in the lower part of the switch housing.
  • the lower part of the switch housing is designed such that it projects above the upper part of the switch housing; the trough-shaped space formed in this way is poured out with casting resin, the holes, of course, not being covered with casting resin.
  • each individual hole must be selected so that a certain cross-section prescribed by the regulations is not exceeded.
  • an electrical switch 12 is inserted and fastened therein, which has a cup-like switch housing lower part 13 and a plate-like switch housing upper part 14.
  • the switch housing lower part 13 has a cup shape, a circumferential recess 15 is provided, on which the plate-shaped switch housing upper part 14 is placed.
  • the switch housing upper part 14 is approximately rectangular and has slots 18 on opposite side edges 16 and 17, into which connecting lugs or connecting lugs 19 and 20 are used, at the inside of the switch 12, that is to say in the switching chamber space 21, leaf spring-like fixed contact pieces 22, 23 are fastened.
  • These leaf spring-like fixed contact pieces 22 and 23 point towards one another and end at a distance d, whereby they have an approximately L-shaped structure, the bent webs of which point towards one another and form approximately a V-shape with one another, which is open towards the switch housing upper part 14.
  • the legs 24 and 25 are bent approximately in a circular manner, wherein a tangent to the legs 24 and 25 can run perpendicular to the upper part 14 of the switch housing.
  • the switch housing upper part 14 has two projections 26 and 27 which are arranged at a distance from one another on the side of the switch housing upper part 14 facing away from the switching chamber space 21. These projections 26 and 27 delimit a bore 28 and 29, through which an actuating plunger 30 is passed so that it is ignition-proof.
  • the connecting lugs 19 and 20 have a connecting lug section 31 and 32 which runs approximately parallel to the switch housing upper part 14 and on which a clamping disk 33, 34, a washer 35, 36 and a clamping screw 37, 38 is screwed. From the lower area of FIG. 2 it can be seen that lateral projections 39, 40, which have dividing walls 41, 42, 43 and 44, are provided on the edges running perpendicular to the connecting line of the two bores 28 and 29 and parallel to the switch housing upper part 14.
  • the switch housing lower part 13 engages over the switch housing upper part 14 and forms with it a trough-shaped space 50 which is poured out with casting resin 51 in order to achieve explosion safety.
  • the upper housing part 60 can be a transparent, translucent cover trough.
  • an intermediate member 61 is provided, which has a circular or rectangular section 62, which has a bottom wall 63 at its end facing the lower housing part 11, in which openings 64, 65 are provided, in which the actuating plunger 30 can be used, either only one actuating plunger 30 or a second actuating plunger 30a (shown in broken lines) can be provided.
  • the actuating plunger 30 has a first cylindrical section 66, the outer diameter of which is adapted to the diameter of the bores 28 and 29 and which covers the essential region of the actuating plunger 30. At one end, the actuating plunger 30 has a region 67 of reduced diameter, which is followed by a further region 68 with an even smaller diameter; a plate-shaped button 69 is provided at the free end
  • the bore 64 or 65 has a first section 70 which corresponds to the section 67 in length and diameter so that the section 70 can receive the section 67; the section 70 is followed by a section 71 with a diameter corresponding to the diameter of the section 68; the holes 64 and 65 are surrounded on a projection 72 and 73 arranged in the interior thereof from the bottom 63 to the free end of the intermediate member 62, and in the assembled state the knob 69 engages behind the free end of the projections 72 and 73.
  • each projection 70 and 73 has a slot 74 starting from its free end, which pushes the button 69 through the holes 64 and 65 and resiliently latches the button 69 behind the free end of the projection 70 or 73 allowed.
  • the actuating plunger 30 or 30a is thus latched on the intermediate member 61, the latching being so will that certain tolerance-compensating movements of the actuating plunger 30 and 30a are possible.
  • each actuating plunger 30 has an area 30c with a reduced diameter in order to prevent damage to the inner surface of the bore 28 by burn marks from switching arcs which may occur; Such damage can impair the ignition breakdown safety.
  • an extension 75 and 76 is formed on opposite surface lines or sides, which projects in the same direction as the plunger 30; the two extensions 75 and 76 can be inserted into openings 77 and 78 with cross-sections that are adapted to the extensions 75 and 76 between the dividing walls 42 and 43 and thus serve to center the intermediate piece and thus the actuating plunger when the housing is closed or the housing upper part 60 is put on on the lower housing part 11. It can be seen from FIG. 3 that the projections 75 protrude beyond the actuating plungers 30 and 30a so that they can also perform the centering function.
  • the invention is described using an explosion-proof lamp with a lower housing part and a transparent upper housing part; can of course the invention can be used wherever housings are provided which are of increased security and have to be opened occasionally in order to exchange devices located inside the housing.
  • the diameter of the plunger must be comparatively small so that the actuating plunger is not blown out in the event of explosions in the switching chamber space and thereby prevents the upper housing part 60 from flying away.
  • the diameter of the bore must not exceed a certain maximum diameter, in order to avoid that tools can be used in the switching chamber space. The bore diameter is therefore prescribed by IP 30.
  • FIG. 4 shows an exemplary embodiment of a switch 80 according to the invention.
  • the switch 80 has a lower housing part 81 which, together with the upper switch housing part 14, forms a pressure-resistant space 82.
  • the bottom 83 of the switch housing lower part 81 has a pocket-like shape 84, on the bottom surface of which a pin 85 is arranged centrally between the two actuating plungers 30 and 30a.
  • a pressure spring 86 is arranged around the pin 85, and the pin 85 and the pressure spring 86 are surrounded by a housing section 88 formed on a partition 87, such that the pressure spring 86 is clamped between the bottom 89 of the housing section 88 and the cup base 84 .
  • the partition 87 is dimensioned such that it can engage between the legs 24 and 25 of the two contact pieces 22 and 23 when the plungers 30 and 30a are pulled out of the switching chamber space 82.
  • the partition 87 is T-shaped in cross section, the web 89 of the T-shape forming the actual partition and the crosspiece 90 forming a guide element within the pocket 84.
  • the rounded free end of the elongated partition 87 contacts the ends of the actuating plungers 30 and 30a which reach into the interior of the pressure-resistant space 82, and when the actuating plungers are pulled out, the free end of the partition 87 lies against the inner surface of the switch housing upper part 14 and thus partially closes the bores 28, 29 for the actuating plungers 30 and 30a.
  • the lower housing part which can be the luminaire housing, for example, has a corresponding recess 91 into which the pocket 84 can engage.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP93104140A 1992-03-19 1993-03-13 Explosionsgeschütztes Gerät, insbesondere Leuchte Expired - Lifetime EP0561317B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4208893A DE4208893A1 (de) 1992-03-19 1992-03-19 Explosionsgeschuetztes geraet, insbesondere leuchte
DE4208893 1992-03-19

Publications (3)

Publication Number Publication Date
EP0561317A2 EP0561317A2 (de) 1993-09-22
EP0561317A3 EP0561317A3 (enrdf_load_stackoverflow) 1995-04-19
EP0561317B1 true EP0561317B1 (de) 1997-09-10

Family

ID=6454501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104140A Expired - Lifetime EP0561317B1 (de) 1992-03-19 1993-03-13 Explosionsgeschütztes Gerät, insbesondere Leuchte

Country Status (2)

Country Link
EP (1) EP0561317B1 (enrdf_load_stackoverflow)
DE (2) DE4208893A1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907846C1 (de) * 1999-02-24 2000-09-21 Abb Patent Gmbh Steckverbinder
DE10052846C2 (de) * 2000-10-25 2003-10-16 Abb Patent Gmbh Anordnung zur Verzweigung elektrischer Stromkreise im explosionsgefährdeten Bereich
DE202005009626U1 (de) * 2005-06-20 2006-10-26 Cooper Crouse-Hinds Gmbh Leuchtenunterbaugruppe
DE102012212454A1 (de) * 2012-07-17 2014-01-23 Osram Gmbh Leuchtstofflampen-ersatzlampe
CN104112613B (zh) * 2013-04-18 2016-12-28 比亚迪股份有限公司 一种驻车指示灯的开关
CN116336404B (zh) * 2023-05-29 2023-08-04 安徽江天云控技术股份有限公司 一种矿用汽车隔爆型摄像照明组合式灯具

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE355874C (de) * 1919-11-25 1922-07-08 Luftschiffbau Zeppelin G M B H Vorrichtung zum OEffnen und Schliessen von Stromkreisen fuer explosionsgefaehrliche Raeume
GB667526A (en) * 1950-04-18 1952-03-05 Lucas Barrett Improvements in push-pull switches for electric circuits
DE845675C (de) * 1951-02-20 1952-08-04 Maehler & Kaege Bodenkontaktabfederung, insbesondere fuer schlagwetter- und explosionssichere Gluehlampenfassungen
DE1741256U (de) * 1953-07-13 1957-03-14 Funke Huster Elektrizitaets Mit magnetischem verstaerker gesteuertes schuetz fuer explosionsgefaehrdete betriebe.
CH336111A (de) * 1955-05-23 1959-02-15 Ciba Geigy Schwadensicheres elektrisches Schaltgerät
DE1850879U (de) * 1959-08-01 1962-05-03 Stahl R Fa Explosionsgeschuetzte elektrische schalteinrichtung.
DE2643187A1 (de) * 1976-09-24 1978-03-30 Mutzhas Maximilian F Explosionsgeschuetztes elektrisches geraet, vorzugsweise als leuchte ausgebildet
DE2756156C2 (de) * 1977-12-16 1985-08-01 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Gehäuse, das mit einem lösbar befestigten Deckel besetzt ist, der den mit elektrischen Geräten ausgestatteten Gehäuseinnenraum druckfest abschließt
SU964755A1 (ru) * 1981-05-26 1982-10-07 Всесоюзный Научно-Исследовательский Проектно-Конструкторский И Технологический Институт Взрывозащищенного И Рудничного Электрооборудования Взрывонепроницаемый электрический аппарат
DE3220915C2 (de) * 1982-06-03 1985-05-23 Brown, Boveri & Cie Ag, 6800 Mannheim Explosionsgeschützter oder schlagwettergeschützter Paketnockenschalter
DE3639485A1 (de) * 1986-11-18 1988-05-26 Karl Kapfer Explosionsgeschuetztes elektrisches geraet
DE3644141C2 (de) * 1986-12-23 1996-02-01 Asea Brown Boveri Explosionsgeschütztes elektrisches Schaltgerät
DE3911901A1 (de) * 1989-04-12 1990-10-18 Stahl R Schaltgeraete Gmbh Explosionsgeschuetzte leuchte
DE8904957U1 (de) * 1989-04-20 1989-06-08 Str Elektronik Josef Schlechtinger Gmbh, 5963 Wenden Klingeltaster
DE3942874A1 (de) * 1989-12-23 1991-06-27 Boesha Gmbh & Co Kg Explosions- und schlagwettergeschuetzte flachleuchte, z. b. strebleuchte

Also Published As

Publication number Publication date
DE59307296D1 (de) 1997-10-16
EP0561317A3 (enrdf_load_stackoverflow) 1995-04-19
DE4208893A1 (de) 1993-09-23
EP0561317A2 (de) 1993-09-22

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