EP2827957A2 - Explosionsschutz mit umhausung - Google Patents
Explosionsschutz mit umhausungInfo
- 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
Links
- 238000004880 explosion Methods 0.000 title claims abstract description 60
- 239000000463 material Substances 0.000 claims description 11
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000006262 metallic foam Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009172 bursting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
Description
Claims
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 (de) | 2012-03-22 | 2013-03-15 | Explosionsschutz mit umhausung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2827957A2 true EP2827957A2 (de) | 2015-01-28 |
EP2827957B1 EP2827957B1 (de) | 2017-11-22 |
Family
ID=48013939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13712714.8A Ceased EP2827957B1 (de) | 2012-03-22 | 2013-03-15 | Explosionsschutz mit umhausung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2827957B1 (de) |
DE (1) | DE102012102468B4 (de) |
WO (1) | WO2013139688A2 (de) |
Families Citing this family (5)
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)
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 (de) * | 1993-10-28 | 1995-05-04 | Albert Thorwesten | Vorrichtung, insbesondere zur explosions-entlastung für rohrleitungen |
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 |
-
2012
- 2012-03-22 DE DE102012102468A patent/DE102012102468B4/de not_active Expired - Fee Related
-
2013
- 2013-03-15 EP EP13712714.8A patent/EP2827957B1/de not_active Ceased
- 2013-03-15 WO PCT/EP2013/055325 patent/WO2013139688A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013139688A3 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013139688A3 (de) | 2014-07-03 |
EP2827957B1 (de) | 2017-11-22 |
DE102012102468B4 (de) | 2013-12-05 |
DE102012102468A1 (de) | 2013-09-26 |
WO2013139688A2 (de) | 2013-09-26 |
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