EP2827957A2 - Protection contre les explosions avec capotage - Google Patents

Protection contre les explosions avec capotage

Info

Publication number
EP2827957A2
EP2827957A2 EP13712714.8A EP13712714A EP2827957A2 EP 2827957 A2 EP2827957 A2 EP 2827957A2 EP 13712714 A EP13712714 A EP 13712714A EP 2827957 A2 EP2827957 A2 EP 2827957A2
Authority
EP
European Patent Office
Prior art keywords
protection device
enclosure
explosion
filter
explosion protection
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.)
Granted
Application number
EP13712714.8A
Other languages
German (de)
English (en)
Other versions
EP2827957B1 (fr
Inventor
Horst Keller
Ulrich Stolz
Norbert Frank
Morris KOCH
Jens Kuhn
Leopold RANG
Volker GERWIG
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.)
Keller Lufttechnik GmbH and Co KG
Original Assignee
Keller Lufttechnik GmbH and Co KG
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 Keller Lufttechnik GmbH and Co KG filed Critical Keller Lufttechnik GmbH and Co KG
Publication of EP2827957A2 publication Critical patent/EP2827957A2/fr
Application granted granted Critical
Publication of EP2827957B1 publication Critical patent/EP2827957B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave

Definitions

  • the invention relates to an explosion protection device according to the preamble of claim 1.
  • Such explosion protection devices are generally used to avoid the danger of explosions occurring in closed spaces.
  • the explosion protection device is generally assigned to a closed room in which there is a risk of explosion.
  • the relief element consists of a rupture disk, which breaks open in the event of an explosion by the resulting pressure wave, so that then a gas stream can escape from the room.
  • the disadvantage here is that no flameless pressure relief is achieved with this rupture disk, since flames can escape unhindered with the gas flow.
  • a relief valve is provided as a relief element in the boundary wall of the room.
  • a relief valve is known for example from DE 199 46 213 C2.
  • a pressure relief is obtained when an explosion occurs, as this opens automatically when a pressure wave occurs, so that a gas flow from the room via the relief valve can flow to the outside.
  • the relief valve has a flame barrier, which may be formed in particular in the form of stacked metal strips. With this flame barrier escape of flames from the room can be relatively well prevented.
  • a filter system for the separation of dust-like particles wherein the housing in which the filter system is integrated forms the closed space.
  • explosive metallic dusts can be deposited, for example, in the processing of metallic workpieces, which consist in particular of aluminum incurred.
  • the invention has for its object to provide an explosion protection device of the type mentioned, by means of which an improved flame protection is achieved in applications outside the intended use.
  • the explosion protection device serves as protection for a arranged in a closed space facility, with a arranged in a boundary wall relief element, by means of which a pressure explosion takes place in the event of an explosion within the room by via this a gas stream is discharged from the room.
  • To the boundary wall connects to a housing, in which at least one flame filter is arranged.
  • the enclosure is designed so that a gas flow emerging from the relief element is guided in the enclosure and thereby passes the flame filter.
  • a pressure relief achieved with the relief element is provided.
  • this relief element can be formed by a simple rupture disk in the boundary wall of the space to be protected, so that with the relief element a pure pressure relief is effected.
  • a relief valve is used. This relief valve has a flame barrier, by means of which a flame protection is already achieved, that is, escape of flames from the room to be protected is prevented when used as intended.
  • a second level of security explosion protection device then comprises on the outside of the room to the boundary wall, a housing.
  • This enclosure is designed so that the gas flow arising in the event of an explosion and discharged via the relief element from the room is guided into the interior of the enclosure.
  • the enclosure forms a guide channel, in which the gas flow is guided so that it can expand.
  • a reduction in the pressure of the gas stream is obtained, which represents another safety measure.
  • the enclosure is designed so that the gas flow emerging from the relief element is deflected on the walls of the enclosure, before it is guided onto the flame filter.
  • At least one flame filter is provided in the enclosure.
  • This flame filter is arranged in the enclosure so that the gas stream leaving the room via the relief element is first guided in the enclosure and can expand. Only then is the gas flow directed to the flame filter. With this flame filter again ignited or combustible particles from the gas stream are partially filtered out and the gas stream is cooled so that the gas exiting from the flame filter gas stream contains no more flames, that is, a complete flameless pressure relief is achieved.
  • the filtered in the flame filter, now completely harmless gas stream can then be carried out preferably via an outlet opening of the enclosure from this.
  • the at least one flame arrester is plate-shaped.
  • the or each plate-shaped flame filter a filter material consisting of a wire mesh package, made of a ceramic material, stainless steel, a metal foam or a glass fiber material whose flow resistance is so low that it does not lead to an unacceptable increase in pressure in the unloaded space.
  • the plate-shaped flame filter can be installed with little design effort in the interior of the housing.
  • the at least one flame filter extends over the entire cross-sectional area of the enclosure.
  • the flame filter is designed as dust retention in the form of a flexible sheet which is fastened to the edge of the outlet opening.
  • the dust retention is stored folded at the edge of the outlet opening. The dust retention is deployed in the event of an explosion by the effluent via the discharge element gas stream.
  • This embodiment operates on the airbag principle.
  • By flowing out of the relief element and guided in the enclosure gas flow forming the dust retention flexible fabric is deployed and inflated into a balloon.
  • the size of the flexible sheet is adapted to the dimension of the space to be protected and thus the amount of gas flowing from the room, so that when inflating the flexibleêtnchen element can absorb the entire gas flow and there is no risk of bursting of the fabric.
  • the flexible sheet consists of a textile filter material or the like, by means of which combustible particles contained in the gas stream can be completely retained.
  • the filter material is gas-permeable, so that the filtered gas stream can penetrate the filter material and thus the gas stream is discharged via the outlet opening.
  • the explosion protection device according to the invention also ensures reliable flameless pressure relief when fine dusts reignite due to high temperatures after the relief element.
  • the explosion protection device according to the invention can thus be used in particular as a protection device on filter systems, by means of which extremely fine, explosive, metallic dusts are deposited. This application is outside the intended use of the relief valves.
  • the explosion protection device according to the invention can thus generally for a variety of explosive environments, that is, for any facilities in closed rooms, are used, with the term facilities units of any kind are included, from which a risk of explosion can go out.
  • Figure 1 Perspective view of a first embodiment of a
  • Explosion protection device for a filter system Explosion protection device for a filter system.
  • FIG. 2 shows a sectional view of the arrangement according to FIG. 1.
  • Figure 3 Second embodiment of an explosion protection device for a filter system.
  • Figure 4 arrangement of Figure 3 at a deployed flame filter.
  • Figures 1 and 2 show a first embodiment of an explosion protection device 1 for a filter system 2.
  • the filter unit 2 is a Housing 3 provided.
  • the housing 3 of the filter system 2 forms a closed space and has in the present case a cuboid contour.
  • the housing 3 is preferably made of a metallic material.
  • the filter system 2 is assigned the explosion protection device 1.
  • the explosion protection device 1 comprises as a first component a relief element in the form of a relief valve 4, which is arranged in a side wall 3a of the housing 3, that is, a boundary wall of the space to be protected.
  • a rupture disk could be provided as a relief element instead of a relief valve 4.
  • the side wall 3a of the housing 3 is oriented in a vertical plane.
  • the relief valve 4 has, in a known manner, a valve arrangement which opens in the event of an explosion in the filter system 2 as a result of the generated overpressure, so that a gas stream can flow out of the housing 3 of the filter system 2.
  • the relief valve 4 further has a flame barrier, which may be formed, for example, of laminated metal strips. This flame barrier has a flame retardant effect.
  • a filter unit 2 are deposited with the extremely fine metallic dusts, with the relief valve 4 is not achieved complete retention of dusts. Since the metallic dusts become very hot in an explosion and can ignite spontaneously, metallic dusts, which pass through the relief valve 4 in the event of an explosion, cause flames in the gas flow outside the housing 3.
  • the explosion protection device 1 as a further component to a housing 5, which is advantageous as the housing 3 of the filter system 2 consists of a metallic material.
  • the housing 5 has a cuboid contour.
  • the enclosure 5 is closed to the bottom by a bottom part 5a and laterally by wall elements 5b, 5c.
  • At the top of the enclosure 5 there is an outlet opening 6, that is to say the enclosure 5 is open toward the top.
  • Two wall elements 5c open at the edges of the side wall 3a of the housing 3 and extend at right angles to this.
  • Another wall element 5b is oriented parallel to the side wall 3a of the housing 3 and connects to the wall elements 5c.
  • the housing 5 thus formed forms a guide channel for the gas stream flowing out of the relief valve 4 in the event of an explosion with overpressure.
  • the flow direction of this gas flow is indicated in Figure 2 by the arrows Gi, G 2 .
  • part of the gas flow on the wall element 5b is deflected by 90 °.
  • the gas stream is guided in the guide channel formed by the enclosure 5 upwards in the direction of the outlet opening 6.
  • the gas stream expands, that is, the overpressure of the gas stream is reduced.
  • the flame filters are in the present case as filter plates 7, that is formed as a plate-shaped body and contain a filter material of a wire mesh.
  • filter plates 7 that is formed as a plate-shaped body and contain a filter material of a wire mesh.
  • glass fiber materials, a metal foam, a ceramic material or even stainless steel can be used as filter materials, the flow resistance being so low that there is no undue pressure increase in the housing 3.
  • the identically formed filter plates 7 are mounted on holders on the inner sides of the wall elements 5b, 5c so that they extend over the entire cross-sectional area of the guide channel of the enclosure 5. This ensures that the entire gas flow is supplied to the flame filter.
  • the flame filters are dimensioned so that their filter surfaces are larger than the cross-sectional area of the enclosure 5. Therefore, the flame filter in the enclosure 5 are inclined. Due to the large filter area thus achieved, the resistance is kept as low as possible.
  • Flame filters can be used to filter out flammable particles contained in the gas stream, ie metallic dusts. Thus, a complete flameless pressure relief is achieved in the housing 5 with the flame filters. This means that there are no longer any flames or combustible parts at the outlet of the filter arrangement, consisting of the flame filters, so that no more flames escape via the outlet opening 6.
  • FIGS. 3 and 4 show a variant of the embodiment according to FIGS. 1 and 2.
  • the embodiment of FIGS. 3 and 4 differs from the embodiment according to FIGS. 1 and 2 in that no filter plates 7 but a flexible sheet 8 are provided as the flame filter is, which preferably consists of a textile filter material.
  • the flexible sheet 8 is peripherally attached to the edge of the outlet opening 6 and closes it off easily.
  • the area of the flexible sheet 8 is many times greater than the cross-sectional area of the outlet opening 6.
  • FIG. 3 shows the flexible sheet 8 in its installed position, in which it lies tightly folded in the outlet opening 6. This installation position retains the flexible sheet 8, as long as no explosion takes place in the filter system 2.
  • the flexible sheet 8 When an explosion occurs exits from the housing 3 via the relief valve 4, a gas flow with excess pressure and is guided in the enclosure 5 in the direction of the outlet 6.
  • the flexible sheet 8 By the gas flow, as shown in Figure 4, the flexible sheet 8 is unfolded and inflated like a triggering airbag.
  • the size of the flexible sheet 8 is adapted to the size of the housing 3 so that it can accommodate the entire gas flow without bursting.
  • the flexible fabric 8 filters in the Gas flow contained particles completely, so that no flames can escape through the outlet 6 to the outside.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

L'invention concerne un dispositif de protection contre les explosions (1) servant à protéger une installation disposée dans un espace fermé, comprenant un élément de détente, disposé dans une paroi de délimitation, qui sert à détendre la pression lorsqu'une explosion se produit à l'intérieur de l'espace, l'élément de détente évacuant un flux de gaz à l'extérieur de l'espace. La paroi de délimitation est raccordée à un capotage (5) dans lequel est disposé au moins un filtre de flamme. Le capotage (5) est configuré de telle manière qu'un flux de gaz sortant de l'élément de détente est guidé dans le capotage (5), où il traverse le filtre de flamme.
EP13712714.8A 2012-03-22 2013-03-15 Protection contre les explosions avec capotage Ceased EP2827957B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012102468A DE102012102468B4 (de) 2012-03-22 2012-03-22 Explosionsschutz mit Umhausung
PCT/EP2013/055325 WO2013139688A2 (fr) 2012-03-22 2013-03-15 Protection contre les explosions avec capotage

Publications (2)

Publication Number Publication Date
EP2827957A2 true EP2827957A2 (fr) 2015-01-28
EP2827957B1 EP2827957B1 (fr) 2017-11-22

Family

ID=48013939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13712714.8A Ceased EP2827957B1 (fr) 2012-03-22 2013-03-15 Protection contre les explosions avec capotage

Country Status (3)

Country Link
EP (1) EP2827957B1 (fr)
DE (1) DE102012102468B4 (fr)
WO (1) WO2013139688A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103500952A (zh) * 2013-10-23 2014-01-08 昆山振宏电子机械有限公司 一种配电柜
DE202014100441U1 (de) * 2014-01-31 2015-05-06 Rembe Gmbh Safety + Control Vorrichtung zur flammenlosen Druckentlastung
DE202014104404U1 (de) 2014-08-18 2015-11-19 Keller Lufttechnik Gmbh + Co. Kg Explosionsschutzvorrichtung
DE202017104480U1 (de) 2017-07-27 2017-08-14 Herding Gmbh Filtertechnik Filtervorrichtung
DE102018120877B4 (de) 2018-08-27 2021-09-30 R.Stahl Schaltgeräte GmbH Explosionsgeschütztes Gehäuse

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151180A (en) * 1936-01-31 1939-03-21 Protectoseal Company Of Americ Conservation venting device and flame arrester
GB720348A (en) * 1951-11-09 1954-12-15 Anders Emanuel Wicklander An arrangement for sub-surface introduction of fluid agents into tanks
DE942916C (de) * 1954-03-30 1956-05-09 Wilke Werke Ag Sicherungseinrichtung gegen Durchschlag von Flammen und Explosionen fuer Behaelter mit brennbaren Fluessigkeiten
US3394843A (en) * 1966-04-22 1968-07-30 Charles B. Grady Jr. Lightweight explosion suppressing enclosure
US4484690A (en) * 1982-03-08 1984-11-27 Service Machine Co. Flame arresting ventilated wall for an explosion-proof enclosure
DE4015354C2 (de) * 1990-05-12 1999-12-23 Rembe Gmbh Mes Und Regeltechni Druckentlastungseinrichtung
WO1995012083A1 (fr) * 1993-10-28 1995-05-04 Albert Thorwesten Dispositif, notamment clapet de decharge gazeuse pour canalisations
AT6424U1 (de) * 1998-10-21 2003-10-27 Hoerbiger Ventilwerke Gmbh Explosions-entlastungsventil
US6732809B2 (en) * 2002-05-06 2004-05-11 Kidde-Fenwal Apparatus for distributing granular material
DE20208576U1 (de) * 2002-06-03 2002-08-22 Brilex Gesellschaft für Explosionsschutz mbH, 59929 Brilon Druckentlastungsvorrichtung mit Berstscheibe
DE10245307A1 (de) * 2002-09-27 2004-04-08 Brilex Gesellschaft für Explosionsschutz mbH Flammensperrender Festkörper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013139688A3 *

Also Published As

Publication number Publication date
WO2013139688A3 (fr) 2014-07-03
EP2827957B1 (fr) 2017-11-22
DE102012102468B4 (de) 2013-12-05
DE102012102468A1 (de) 2013-09-26
WO2013139688A2 (fr) 2013-09-26

Similar Documents

Publication Publication Date Title
EP3215236B1 (fr) Filtre pare-flamme constitué d'un certain nombre de séries de couches et agencements de filtres pare-flamme et leur utilisation
EP2827957B1 (fr) Protection contre les explosions avec capotage
DE19946213C2 (de) Explosions-Entlastungsventil
EP3373362B1 (fr) Dispositif de boîtier pourvu d'au moins une unité électrique présentant un danger de surchauffe
DE112017005654T5 (de) Gaserzeuger
DE10112957B4 (de) Flammensperrenanordnung
EP3021435B1 (fr) Dispositif d'aération
DE112009001307T5 (de) Pyrotechnischer Gasgenerator mit Brennkammer und Diffusionskammer unterschiedlichen Querschnitts
DE102012104763B4 (de) Druckentlastungsvorrichtung mit einer Berstscheibe und mit einer Flammendurchschlagssicherung
DE102016003780B4 (de) Gehäuse für ein elektrisches Gerät
AT8961U1 (de) Anlage zum filtern brennbarer stäube
EP1611937A1 (fr) Dispositif de filtration
EP2332617A1 (fr) Dispositif anti-retour de flammes pour installations d'extraction
DE102016109136A1 (de) Front-Cooking-Station
DE202017104480U1 (de) Filtervorrichtung
EP2461919A2 (fr) Dispositif de protection pour une installation de test
DE1192980B (de) Vorrichtung zur Sicherung von Behaeltern fuer feuergefaehrliche Fluessigkeiten und Gase
DE2852113B2 (de) Explosionssicheres Gehäuse
DE102008040462B4 (de) Druckstoßklappe
DE102004006318B4 (de) Gasgeneratoreinheit für ein Gassack-Modul
DE202014104404U1 (de) Explosionsschutzvorrichtung
DE202011050194U1 (de) Flammenlose Druckentlastungseinrichtung für Werkzeugmaschinen
DE202004004335U1 (de) Entgasungssystem für Akkumulatoren
DE29903409U1 (de) Seitenaufprall-Gassack für ein Fahrzeuginsassen-Rückhaltesystem
DE29710385U1 (de) Gehäuseartige Umkleidung für Maschinen

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140708

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20170725

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE

RBV Designated contracting states (corrected)

Designated state(s): DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502013008876

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502013008876

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20180823

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20200311

Year of fee payment: 8

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502013008876

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211001