EP3969129A1 - Flammenschutzfilter - Google Patents
FlammenschutzfilterInfo
- Publication number
- EP3969129A1 EP3969129A1 EP20724469.0A EP20724469A EP3969129A1 EP 3969129 A1 EP3969129 A1 EP 3969129A1 EP 20724469 A EP20724469 A EP 20724469A EP 3969129 A1 EP3969129 A1 EP 3969129A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protection filter
- flame protection
- lattice structure
- layers
- grid
- 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.)
- Pending
Links
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- 239000011265 semifinished product Substances 0.000 claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 30
- 239000011888 foil Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims description 3
- 238000001465 metallisation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 239000000758 substrate Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 93
- 239000004744 fabric Substances 0.000 description 13
- 238000005520 cutting process Methods 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
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- 230000008021 deposition Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
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- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- TVTJUIAKQFIXCE-HUKYDQBMSA-N 2-amino-9-[(2R,3S,4S,5R)-4-fluoro-3-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-7-prop-2-ynyl-1H-purine-6,8-dione Chemical compound NC=1NC(C=2N(C(N(C=2N=1)[C@@H]1O[C@@H]([C@H]([C@H]1O)F)CO)=O)CC#C)=O TVTJUIAKQFIXCE-HUKYDQBMSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 229940125851 compound 27 Drugs 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0091—Including arrangements for environmental or personal protection
- B01D46/0093—Including arrangements for environmental or personal protection against fire or explosion
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/10—Filter screens essentially made of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0457—Specific fire retardant or heat resistant properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0613—Woven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0681—The layers being joined by gluing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
- B01D2273/20—High temperature filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/10—Multiple layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/20—Shape of filtering material
- B01D2275/202—Disc-shaped filter elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
- B23K26/384—Removing material by boring or cutting by boring of specially shaped holes
Definitions
- the invention relates to a flame protection filter for explosion protection.
- a flame arrester arrangement which has at least two flame arrester inserts and an intermediate layer which enables a radial distribution of the gas exiting from one flame arrester insert which basically flows in the direction of the second flame arrester insert.
- DE 10 2017 112 162 A1 describes a flame protection filter with a number of fabric layers with an intermediate layer with meshes, which has a mesh size of the intermediate layer openings which is greater than the size of the meshes of the fabric layers.
- the flame protection filter according to the invention has a lattice structure.
- the lattice structure according to the invention defines lattice openings which are delimited from intersecting web sections, which are preferably arranged transversely, for example perpendicularly, to a throughflow direction of the pressure relief body and / or the lattice structure according to the invention is formed by a scrim.
- the web sections can be straight or curved.
- Web sections are preferably strip-shaped and / or rod-shaped.
- the grid openings limited by intersecting web sections can be polygonal, preferably rectangular, in particular square. Alternatively, it is possible, for example, for intersecting web sections to delimit a circular or elliptical grid opening.
- the intersecting web sections can form a perforated grid, for example a perforated plate, which has, for example, circular and / or elliptical grid openings.
- a perforated film can have intersecting web sections which, for example, delimit circular and / or elliptical grid openings.
- the alternatively or additionally formed scrim is a sheet of at least two layers, each with straight or curved webs extending in one direction. Bars can in particular be strip-shaped and / or rod-shaped.
- the scrim can be bidirectional or multidirectional. The directions are transverse to each other, for example perpendicular, aligned and transverse, especially perpendicular to the direction of flow through the flame protection filter.
- flow-through channels or apertures are formed.
- the flow through the filter is divided into partial flows. This can lead to a distribution of the heat input into the flame protection filter over a larger area. This can improve the effectiveness of the flame protection filters.
- the flame protection filter can be formed from an arrangement of at least two layers that are not directly connected to one another. These form a flame protection filter arrangement.
- One or more of the layers can be a single layer or can be composed of at least two layers directly connected to one another.
- Two or more layers of the flame protection filter can be arranged adjacent to one another or in contact with one another, the layers being able to be fastened directly to one another or not being able to be fastened directly to one another.
- the grid structure can form a layer that directly adjoins a layer or is arranged adjacent to a layer, which alone or possibly together with other layers ensures that the flame protection filter arrangement does not fail to ignite.
- the lattice structure can be spaced from the position which ensures the security against ignition breakdowns.
- Layers of the flame protection filter can form a flame protection filter body.
- the layers can be connected to one another for this purpose.
- the layers can be sintered, glued, welded or in some other way, in particular cohesively, be connected to each other.
- the grid structure can form a layer or belong to a layer that is connected to another layer.
- the lattice structure can form a layer or belong to a layer which is separate from the neighboring layer.
- such a layer that is not connected to the adjacent layer can also be referred to as a plane of a flame protection filter arrangement.
- the flame protection filter alone or with other elements can form a pressure relief body for an explosion-proof housing for electrical equipment, in particular according to the protection class flameproof encapsulation.
- a pressure relief flow can be divided into partial flows, whereby the heat input into the pressure relief body is distributed over a larger area and thus the effectiveness of the pressure relief body for reducing pressure is increased.
- Another advantage of the flame protection filter according to the invention, which forms a pressure relief body for an explosion-proof housing is that additional, complex machining of the housing can be dispensed with. Because the lattice structure is part of the flame protection filter and thus of the pressure relief body. It is therefore not necessary to incorporate partial openings or bars into the wall of the explosion-proof housing.
- the lattice structure forms at least one layer of the flame protection filter.
- the flame protection filter can have at least one further layer. At least one or all of the further layers can be formed by a lattice structure according to the invention as described herein.
- one or each further layer can have a grid structure which defines grid openings which are mutually intersecting web sections are bounded, and / or wherein the lattice structure is formed by a scrim.
- the flame protection filter according to the invention can have a number of fabric coverings.
- a lattice structure according to the invention can form a further layer between two further layers.
- a lattice structure according to the invention can form an end position on the side of the arrangement of further layers facing against the flow direction or an end position on the side of the arrangement of further layers facing in the flow direction.
- the flame protection filter forms a pressure relief body of a pressure-tight housing, the flow direction is preferably from the interior of the housing to the outside.
- Embodiments of inventive flame protection filters with grid openings which are delimited from each other intersecting web sections, have, for example, at least one layer of sheet metal or foil with a plurality of openings, which form the grid openings. These openings can be made from a sheet metal or foil material by cutting out sections.
- the lattice structure can be formed by one or more such layers. In the case of several layers, the openings are preferably one above the other, so that the interconnected or unconnected layers form channels or diaphragms openings as grid openings which perpendicularly measure the arrangement of the layers.
- the web sections themselves are preferably free of openings.
- the lattice structure can in particular by
- Shear cutting (punching) and / or laser cutting of the grid structure can be made from a film or sheet metal.
- the grid opening area is cut out of the foil or sheet metal with loss of material.
- One or more cutting lines are introduced into the material and the cutting or punching residue, which is preferably in the form of foil or sheet metal and / or has a shape deviating from a chip shape, is removed within the one or more punching or cutting lines, to form the grid opening in the sheet or foil.
- the lattice structure is preferably not produced by perforating, the foil or sheet metal being pierced by means of a laser, an electron beam or a mechanical drill.
- the lattice structure can be formed by an expanded metal mesh. This can be made of metal - then also called expanded metal - or plastic.
- the meshes are generated by means of offset cuts, preferably essentially without loss of material, with stretching deformation.
- a lattice structure according to the invention can be produced by laying strips, in particular foil or sheet metal strips.
- each layer is preferably formed exclusively by webs running in one direction. Bars in a first direction preferably run either above or below (with a corresponding, possibly imaginary orientation of the flame protection filter) the arrangement of bars in the second direction. A change preferably does not take place.
- the length of the webs with the same dimensions of the lattice structure can be smaller than in a fabric in which each "thread" has a corrugated structure to alternately run above and below transverse rods or threads. This means that the thermal conductivity of the Lattice structure improved compared to a fabric.
- Further layers which in embodiments can be present in addition to the lattice structure, can have openings, the opening area content of which is defined in an opening area area.
- the opening area content of the grid openings of the grid structure is preferably several times, preferably at least ten times or at least thirty times or even at least a hundred times greater than the largest opening area content within the opening area content area.
- the lattice structure can at least partially be a fabric that has meshes whose mesh sizes are rich in a first mesh size range and has meshes whose mesh sizes are in a second mesh size range, each mesh size being larger in the second mesh size range as the largest mesh size in the first mesh size range.
- the meshes with mesh sizes in the second mesh size range form the grid openings.
- the grid openings can have a uniform mesh size.
- Arrays of several elongated warp elements or weft elements run between adjacent grid openings. These are interwoven with weft elements or warp elements running transversely.
- the elongated weft elements or warp elements within the arrangement come to lie between two grid openings individually or in groups alternately above and below individual or groups of warp elements or weft elements extending transversely thereto.
- the mesh sizes in the second mesh size range are preferably at least five times larger or even at least ten times larger than the largest mesh size in the first mesh size range.
- a lattice structure can be woven, with a distance from the second mesh width range being selected at regular or irregular intervals between adjacent warp threads and adjacent weft threads, the webs of the lattice structure being formed from elongated warp elements or elongated weft elements, which between each other Ma with mesh sizes from the first mesh size range.
- the webs are interwoven at the warp and weft element level, each containing several warp elements or several weft elements, preferably strip-shaped structures.
- the warp elements and weft elements can in particular be wires or strips made of metal or plastic.
- the first mesh size range can in particular include the mesh size zero.
- the warp elements and weft elements which form meshes with a mesh size from the first mesh size range, can consequently form zero meshes.
- the warp elements and / or weft elements can be, for example, wire-shaped, thread-shaped and / or strip-shaped.
- the lattice structure can be produced by compressing a material for the flame protection filter or a semi-finished product for the flame protection filter. be generated, the points where the material or the semi-finished product is compacted, forming the webs of the grid structure.
- the compression can have been carried out by mechanical deformation.
- the compression can be carried out by introducing a substance into one or more layers of the material or the semi-finished product of the flame protection filter.
- the compression can be carried out on one side on the side of the material or the semi-finished product of the flame protection filter facing the flow or the side of the material of the flame protection filter or the semi-finished product of the flame protection filter facing in the flow direction, or on both sides.
- a structure of the flame protection filter By compressing and / or by mechanical deformation, a structure of the flame protection filter can be generated in which the thickness of the flame protection filter, measured on a web section, is smaller than the thickness, measured in a lattice opening of the lattice structure.
- the side facing the flow and / or the side facing away from the flow can have a wave structure with a period which corresponds to the opening width of the grating structure.
- web sections of the lattice structure can be produced by allowing a substance to solidify on a carrier.
- the carrier can be a material of the filter body, a semifinished product of the filter body or an auxiliary carrier which is removed in a later method step in order to produce the flame protection filter becomes.
- the substance can be silicone adhesive or metal, for example.
- the solidified substance can for example be a weld bead.
- the web sections can be formed by an additive manufacturing process.
- the Stegab sections can be generated in embodiments, for example, by welding and / or by laser deposition welding.
- the web sections can block the direct passage of gas through openings in a layer of the flame protection filter.
- the substance can close openings in a layer of the flame protection filter.
- the layers within the projection of each grid opening area of the grid structure in the flow direction are free of connection points for connecting the layers.
- the space that is traversed or traversed by the imaginary displacement of the grid opening area in the flow direction is preferably free of connection points for connecting the layers.
- a flame protection filter according to the invention can be produced, as is described herein.
- a substance on a carrier in particular on a material or semi-finished product of the flame protection filter, can be allowed to solidify to produce the lattice structure.
- a material for the flame protection filter or a semi-finished product of the flame protection filter can be used in places which define a grid as a whole - for example, by mechanical deformation of the material or the semi-finished product - can be compressed to form the grid structure.
- Figure 1 - a perspective view of an exemplary embodiment of an open and otherwise explosion-proof housing with two pressure relief devices, each with a flame protection filter according to the invention
- FIG. 2a - a perspective view of an embodiment of a flame protection filter according to the invention
- FIG. 2b - a partial plan view of the flame protection filter according to FIG. 2a
- FIG. 2c - a partial plan view of a flame protection filter according to a further embodiment
- FIG. 2d - a partial plan view of a flame protection filter in accordance with yet another exemplary embodiment
- FIG. 3 - a perspective view of a further exemplary embodiment of a flame protection filter according to the invention
- FIG. 4a - a sectional view through yet another embodiment of a flame protection filter according to the invention, wherein the direction of flow lies in the sectional plane
- FIG. 4b - a partial plan view of the flame protection filter according to FIG. 4a
- FIG. 5 shows a perspective view of a semifinished product of an example of a fourth embodiment of a flame protection filter according to the invention.
- Embodiments of explosion-proof housings according to the invention are explosion-protected according to the "flameproof enclosure" type of protection.
- Housings according to the invention can have one or more pressure relief devices each with at least one flame protection filter according to the invention.
- FIG. 1 shows an exemplary embodiment of such an explosion-proof housing 10 with the cover removed.
- the housing 10 defines an interior space 11.
- the Ge housing 10 has two pressure relief openings 12a, 12b. These are closed with pressure relief bodies 13a, 13b, each with at least one flame protection filter 14a, 14b according to the invention, so that they cannot be ignited.
- a gas exchange through the flame protection filters 14a, 14b is basically possible, for example in order to establish pressure equalization between the interior 11 of the housing 10 and its surroundings. In the event of an explosion in the interior 11 of the housing 10, however, gas or particles can only leave the housing 10 cooled by the flame protection filter 14a or 14b so that the gas or particles cannot ignite the atmosphere outside the housing 10.
- the flame protection filter 14a is arranged in a first pressure relief body 13a in such a way that the lattice structure 15a according to the invention for dividing the pressure relief opening 12a into several partial openings 16 corresponds to the interior 11 of the explosion-proof Housing 10 is facing.
- the lattice structure 15a is correspondingly traversed in front of at least one further layer of the flame protection filter 14a.
- the flame protection filter 14b of the second pressure relief body 13b the lattice structure of which is covered by at least one further layer of the flame protection filter 14b in the view shown in FIG.
- At least one of the flame protection filters 14a, 14b can be oriented such that the lattice structure according to the invention faces outwards, so that the flow is through the lattice structure after the gas has flowed through the at least one additional layer of the flame protection filter of the second pressure relief device.
- the lattice structure can form an intermediate layer between at least two further layers of the flame protection filter (not shown).
- each pressure relief body 13a, 13b divides the corresponding pressure relief opening 12a, 12b in the housing 10 into partial openings 16.
- the sub-division of the pressure relief opening 12a, 12b into partial openings 16 takes place by the web sections 17 (see, for example, FIG. 2a) of the lattice structure 15a. Since the web sections are not one-piece components of the wall 18 of the housing 10, which delimit the pressure relief opening 12a or 12b, complex machining of the housing wall 18 to produce the grid structure 15a for distributing the heat input and / or the gas flow is not necessary.
- a pressure relief opening 12a, 12b with a contiguous opening area in the wall 18 of the housing 10, which is only subdivided into partial openings 16 by the pressure relief opening 12a or 12b by means of the pressure relief body 13a or 13b by means of the pressure relief body 13a or 13b.
- a pressure relief flow from the interior 11 of the housing 10 to the outside is divided into partial flows, whereby the heat input into the pressure relief body 13a (the same applies to the pressure relief body 13b) over a larger area distributed and thus the effectiveness of the pressure relief body 13a to reduce pressure is increased.
- the grid openings of the grid structure 15 can be delimited by mutually intersecting web sections 17i, 17ii.
- the Stegab sections 17i, 17ii are transverse, preferably perpendicular, to a flow direction D of the pressure relief body 13a,
- the web sections 17i, 17ii can be straight or curved.
- the web sections 17i, 17ii can be rod-shaped.
- the web sections 17i, 17ii can form a perforated grid.
- the Stegab sections 17i, 17ii extend in a common plane.
- the grid structure 15a is preferably flat and / or the intersecting web sections 17i, 17ii lie in one plane.
- a regular lattice structure 15a which lattice structure 15a is formed from intersecting web sections 17i, 17ii, is shown by way of example in FIG. 2 in a perspective view.
- the index a or b is omitted in the following, because the first flame protection filter 14a and / or the second flame protection filter can be implemented, for example, according to one of the embodiments described below.
- the lattice structure 15 shown in FIG. 2 has rectangular, here square, lattice openings 19 which form the partial openings 17 of the pressure relief opening 12.
- the grid openings 19, apart from the grid openings on the edge of the grid structure 15, preferably have the same area.
- the lattice structure 15 is shown in Figure 2 as an end layer or end position of the flame protection filter 14, which either faces a gas flow direction D from the interior 11 of the housing 10 or points outward in the gas flow direction D from the interior 11.
- the outer contour of the lattice structure 15 is round in the embodiment shown.
- the lattice structure 15 can, however, also be polygonal or angular, for example rectangular or square.
- the shape of the outer contour corresponds geometrically similar to the shape of the outer contour of the pressure relief body 13 and / or the pressure relief opening 12.
- the lattice structure 15 can be made, for example, from a sheet metal or a film. Intersecting web sections 17i, 17ii can be formed, for example, in that the grid openings 19 are cut out of the foil or sheet metal, for example by laser cutting and / or punching.
- the web sections 17i, 17ii can be made of metal or plastic.
- the lattice structure 15 according to FIG. 2 can, for example, be cut or punched from a metal sheet or a metal foil.
- the grid opening areas 19 are produced with a loss of material.
- the lattice structure 15 can be formed by an expanded metal, in particular expanded metal (not shown).
- expanded metal The meshes are created by staggered cuts without loss of material while stretching at the same time. These meshes are delimited at least on two sides by intersecting web sections. Without additional measure, however, pairs of intersecting web sections extend, not parallel to a common plane, but even if the grid structure extends as a whole in a grid, the pairs of intersecting web sections are employed obliquely to this lattice level. By mechanical deformation transversely to the grid plane, all pairs can be deformed in such a way that they extend parallel to the grid plane.
- the grid opening which is delimited by the intersecting web sections 17i, 17ii, is delimited from an adjacent grid opening.
- a cross flow from a grid opening in the plane of the grid structure is thus made more difficult or prevented.
- the intersecting web sections 17. i, 17. ii consequently form flow-through orifice openings or channels for a separation of the gas flow into partial flows at least within the plane of the lattice structure 15. This is in contrast to a fabric layer in which the webs cross but do not intersect, so that there is less flow resistance to a cross flow in the fabric layer becomes.
- the flame protection filter 14 has additional layers or layers 20.2 to 20.8, which can each form grids. These additional layers 20.2 to 20.8 can be layers of fabric. Alternatively, one or more additional layers 20.2 to 20.8 can be formed from a scrim and / or have intersecting web sections. As an alternative or in addition, it is possible for at least one or all of the additional layers 20.2 to 20.8 to be made of random fiber material or felt material.
- the flame protection filter 14 can be formed by an arrangement of unconnected planes 20.1 to 20.8. However, the lattice structure 15 (layer 20.1) and the white direct layers 20.2 to 20.8 are preferably connected to one another.
- the layers 20.1 to 20.8 can for example be glued to one another, connected by sintering, connected by mechanical deformation, screwed or the like.
- the lattice structure 15 is not connected to the finer lattices of the layers 20.2 to 20.8, the finer lattices of the layers 20.2 to 20.8 being or not connected to one another.
- Embodiments are possible in which more or less than eight layers 20.1 to 20.8 are arranged next to or on top of one another, either touching or not touching one another.
- lattice layers 20.2 to 20.8 which are present have a multiplicity of openings 21, the opening area content of which is defined in an opening area area.
- the opening area content of the grid openings 19 of the grid structure 15 is preferably a multiple, preferably at least five times, or even at least ten times, or even at least thirty times or even at least one hundred times greater than the largest opening area within the opening area.
- Figure 2b This illustrates a partial plan view of the flame protection filter 14 according to the invention according to FIG. 2a. Section A, which FIG. 2b shows, is shown in dashed lines in FIG. 2a.
- the layer 20.2 arranged below the lattice structure 15 forms openings 21 which have an opening area that is several times, in the present exemplary embodiment far more than ten times smaller than the opening area of a lattice opening of the lattice structure 15. This results in a rough division of the pressure relief flow achieved in partial flows through the lattice structure 15.
- the flame protection filter 14 can be set up in such a way that the lattice structure 15 itself does not contribute anything to the ignition breakdown resistance. Rather, the remaining layers 20.2 to 20.8 together can already produce ignition breakdown strength.
- the lattice structure 15 only ensures the distribution of the gas flow over the entire surface of the flame protection filter 14.
- layers 20.2 to 20.8 are shown in the exemplary embodiment shown, which together ensure security against flammability, these can also be more or fewer (e.g. only one) layers.
- more than just one layer 20.1 can form a lattice structure 15 according to the invention.
- a flame protection filter 14 can have at least two layers (not shown), each of which Form lattice structures 15 according to the invention.
- the example there are several, at least two, lattice structures divide the flow through the flame protection filter one behind the other into coarse partial flows.
- One or more fine grids can be arranged between at least two grating structures.
- the gas flow can be controlled or directed.
- the opening width (e.g. mesh width) of the plurality of openings 21 which are present in the additional layers 20.2 to 20.8 are preferably set in an opening width range.
- the width of the web sections 17i, 17ii of the lattice structure 15, as can be seen from FIG. 2b, is preferably greater than the largest opening width within the opening width range.
- the width of each web section 17i, 17ii preferably covers at least one or at least two openings 21 of the layer 20.2 arranged below the web section 17i, 17ii. “Below” refers to a corresponding - possibly imaginary - alignment of the flame protection filter 14.
- FIG. 2c shows a section A of a further exemplary embodiment of a flame protection filter 14 according to the invention.
- FIG. 2c illustrates a sectional top view of the exemplary embodiment.
- the grid structure of the exemplary embodiment shown in FIG. 2c is a perforated grid, e.g. perforated plate or perforated foil, with circular grid openings 19.Otherwise, to explain the exemplary embodiments
- FIG. 2d shows a section A of a further exemplary embodiment of a flame protection filter 14 according to the invention.
- the lattice structure 15 can have lattice openings 19 arranged at regular intervals (as shown, for example, in FIG. 2a) or at irregular intervals, which in the exemplary embodiment according to FIG. 2d are formed by meshes 19 between two elongated warp elements 29 and two elongated weft elements 30, the meshes 19 being one mesh size from a second mesh size range. Between the meshes 19 he stretches webs 17i, 17ii, which are formed from an arrangement of several elongated Kettele elements 29 running next to one another or an arrangement of several elongated weft elements 30 running next to one another.
- the warp elements 29 and / or the weft elements 30 can, in particular, be wire, thread or strip-shaped.
- meshes 31 are formed between adjacent weft elements 30 and warp elements 29, which have a mesh size from a first mesh width region.
- the mesh size from the second mesh size range is larger than each mesh size from the first mesh size range.
- the mesh sizes in the second mesh size range are preferably at least five times larger or even at least ten times larger than the largest mesh size in the first mesh size range.
- the first mesh size range can in particular contain the mesh size zero.
- zero meshes can be formed as meshes 31 in the arrangements.
- the lattice structure according to FIG. 2d has intersecting web sections 17i, 17ii which delimit a lattice opening 19. Because webs 17i are each formed from an order of several elongated chain elements 29, which are spaced transversely, preferably perpendicularly, to it extending several elongated weft elements 30 are interwoven - preferably according to a plain weave - which form a further web 17ii, the webs 17i, 17ii also delimit a mesh 19 (grid opening) with a mesh size from the second mesh size range and the weft and warp elements in limit the intersection areas of the arrangements meshes 31 which have a mesh size aufwei sen, for example the mesh size zero, which is smaller than the mesh size of the mesh 19 between intersecting arrangements. As shown, elongated weft elements 30 or the elongated warp elements 29 come to lie within the arrangement between two grid openings 19 individually alternating above and below individual Kettelemen 29 or weft elements 30 running transversely
- the mesh size of the grid opening 19 is preferably, and as can be seen from FIG. 2d, greater than the width b of each web section 17i, 17ii which delimits the grid opening 19, e.g. at least five times larger or at least ten times larger. This applies to other fiction, contemporary embodiments, for example for the Auspar approximately forms, which are shown in the other figures, preferably accordingly.
- a layer 20.2 is shown schematically below the lattice structure 15, which layer has openings 21 which are smaller than the lattice opening 19.
- the description of the other exemplary embodiments can be used.
- FIG. 3 shows an exemplary embodiment of a further embodiment of a pressure relief body 13 according to the invention.
- the pressure relief body can comprise the flame protection filter 14 according to the invention or formed by it. be det. The above description can be used for the flame protection filter 14, unless otherwise described below.
- the grid structure 15 is formed from a scrim.
- the scrim has a layer of webs 17i oriented in a first direction RI and a second layer of webs 17ii oriented in a second direction R2 oriented transversely, for example perpendicularly, to the first direction RI. Rectangular, in particular square, or other polygonal grid openings 19 can thus be created.
- the scrim can be formed, for example, by arranging sheet metal strips, for example sheet metal strips, in the first direction RI and arranging further sheet metal strips in the second direction R2. As shown, no web 17i, 17ii changes the layer, but rather all webs 17i and 17ii arranged across the entire length of the arrangement as webs 17ii or 17i oriented to one side of the arrangement.
- the sheet metal strips of different orientation are preferably connected to one another at the crossing points, for example glued, sintered, welded or the like.
- the webs 17i and / or 17ii of one or both layers are preferably straight in order to form the shortest possible connection to the edge of the flame protection filter 14 for good thermal conductivity in order to distribute the heat in the pressure relief body 13 and / or in the housing wall 18 to derive.
- Another possibility for forming the lattice structure according to the invention is to compress a material for the flame protection filter 14 or a semifinished product of the flame protection filter 14 at points 22 forming a lattice structure 15 by means of mechanical deformation.
- the points 22 at which the material or the semi-finished product is compacted by mechanical deformation form the web sections 17i, 17ii of the lattice structure 15.
- the web sections 17i, 17ii intersect one another.
- the web sections 17i, 17ii are preferably net angeord in one plane.
- the result is a wave structure with a period which corresponds to the opening width of the grating structure 15.
- a correspondingly produced embodiment is shown in a partial cross-sectional view in Figure 4a.
- the flow or throughflow direction D lies in the cross-sectional plane.
- FIG. 4b shows a section of a top view of the side of the flame protection filter 14 which is structured by compression.
- pillow-shaped areas 23 are formed between the webs 17i, 17ii, so that overall a quilt structure results. These areas 23 form the grid openings 19, because the permeability of the flame protection filter 14 through the webs 17i, 17ii is at least greatly reduced compared to the permeability through the areas 23.
- the points 22 can be so tightly sealed that the webs 17i, 17ii are impermeable to gas.
- page 24 of the flame protection filter 14 with the quilted cover structure is opposite to the direction of flow D.
- the opposite side 25 is flat.
- the quilt-like, three-dimensionally structured side 24 is oriented in the flow direction D.
- the material for the flame protection filter 14 and / or the semi-finished product is compacted from both sides 24, 25, so that two oppositely oriented sides 24, 25 result, which can be structured three-dimensionally, for example quilt-like.
- the material can have one or more layers, in particular special fabric layers.
- the material can be for example exclusively have fabric layers.
- the mechanical deformation creates a total of flame protection grids with a grid structure made up of intersecting web sections 17i, 17ii.
- the thickness dl of the flame protection filter 14 measured on a web section 17i, 17ii is smaller than the thickness d2 measured in a lattice opening 19 of the lattice structure 15.
- Ge means measured on a web section 17i, 17ii that the web section 17i, 17ii is in a straight line (parallel to the direction of flow) between the two reference points, the distance between which is determined. The same applies to the grid opening 19.
- FIG. 5 shows an exemplary embodiment of yet another embodiment.
- the preceding description can be used for explanation, unless otherwise stated in the following description.
- the lattice structure 15 is produced at least partially by allowing a substance to solidify on a carrier 26.
- the carrier 26 can be an auxiliary means, which is to be removed to provide the Flammenschutzfil age 14 again.
- the carrier 26 can form at least one layer of the filter protection filter 14.
- webs 17ii of a layer in one direction RI have already been produced.
- a web 17ii running in a direction transverse to this, preferably perpendicular, is produced by means of an instrument I by applying a compound 27 to the semi-finished flame protection filter product 28 and allowing it to solidify there in order to form a web 17i.
- the mass 27 can, for example, silicone o- be the glue.
- the web sections 17i, 17ii can be formed by welding beads.
- One possibility is to apply metal powder to the carrier 26 and at least to melt it by means of, for example, a laser, so that the metal particles combine when they solidify.
- the web sections 17i, 17ii can in particular be produced by laser deposition welding or by another manufacturing method suitable for the additive production of webs. In addition to metal, plastics or materials based on natural substances can also be incorporated or applied. When the webs 17i, 17ii are produced, a scrim of webs 17i, 17ii results.
- some or all of the layers 20.2 to 20.8, which may be present in the flame protection filter 14 in addition to the grating structure 15, are within the projection of each area of the grating openings 19 of the grating structure 15 in flow direction D free of connection points.
- the space which is traversed by the imaginary displacement of a surface of the grid opening 19 in the flow direction D is preferably free of connection points. This results in a greatly increased flow resistance at the web sections 17i, 17ii, but a significantly lower flow resistance between the web sections 17i, 17ii.
- a flame protection filter 14, 14a, 14b with a lattice structure 15, 15a is specified, the lattice structure 15, 15a defining lattice openings 19, which of mutually intersecting web sections 17i, 17ii are limited, and / or wherein the lattice structure 15, 15a is formed by a scrim.
- a method according to the invention for producing a lattice structure 15, 15a of a flame protection filter 14, 14a, 14b has the step of allowing a substance 27 to solidify on a carrier 26 around at least one web section 17i, 17ii of the Git
- the method can, for example, have the step of compressing a material for the flame protection filter 14, 14a, 14b or a semi-finished product 28 of the flame protection filter 14, 14a, 14b at points 23 - for example by mechanically deforming the material or the semi-finished product 28 to form at least one web section 17i, 17ii of the grid structure 15, 15a.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Textile Engineering (AREA)
- Filtering Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019112618.5A DE102019112618A1 (de) | 2019-05-14 | 2019-05-14 | Flammenschutzfilter |
PCT/EP2020/062468 WO2020229235A1 (de) | 2019-05-14 | 2020-05-05 | Flammenschutzfilter |
Publications (1)
Publication Number | Publication Date |
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EP3969129A1 true EP3969129A1 (de) | 2022-03-23 |
Family
ID=70613766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20724469.0A Pending EP3969129A1 (de) | 2019-05-14 | 2020-05-05 | Flammenschutzfilter |
Country Status (5)
Country | Link |
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US (1) | US20220233989A1 (de) |
EP (1) | EP3969129A1 (de) |
CN (1) | CN113795309B (de) |
DE (1) | DE102019112618A1 (de) |
WO (1) | WO2020229235A1 (de) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT132793B (de) * | 1931-10-20 | 1933-04-10 | Rumpel Ag Bauunternehmung G | Sicherheitseinrichtung an Tankanlagen gegen Zündung. |
US2464301A (en) * | 1943-12-18 | 1949-03-15 | American Viscose Corp | Textile fibrous product |
US3268990A (en) * | 1963-12-02 | 1966-08-30 | Nat Standard Co | Method of making filters |
US6604644B1 (en) * | 1999-05-25 | 2003-08-12 | Ronald L. Fenton | Filler element for a tank |
FR2818112B1 (fr) * | 2000-12-20 | 2004-11-19 | Applic Gaz Sa | Grille pare flammes et barbecue comportant une telle grille |
DE102009024814A1 (de) * | 2009-06-09 | 2010-12-16 | Leinemann Gmbh & Co. Kg | Flammensperranordnung |
GR1007488B (el) * | 2010-03-15 | 2011-12-21 | Αντωνιος Παναγιωτη Αναγνωστοπουλος | Μεθοδος και μηχανη παραγωγης πλεγματος απο μπετοβεργα, συρμα ή αλλο υλικο πρισματικης διατομης με συγκολληση με προσθεση υλικου |
DE102010016782B4 (de) * | 2010-05-04 | 2016-12-08 | R.Stahl Schaltgeräte GmbH | Druckentlastungsvorrichtung für druckfest gekapselte Gehäuse |
DE102013109259A1 (de) * | 2013-08-27 | 2015-03-05 | R.Stahl Schaltgeräte GmbH | Druckentlastungsvorrichtung für ein explosionsgeschütztes Gehäuse und Verfahren zu deren Herstellung |
DE102014206143A1 (de) * | 2014-04-01 | 2015-10-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Laserauftragschweißen von hochwarmfesten Superlegierungen mittels oszillierender Strahlführung |
DE102014116149A1 (de) * | 2014-11-06 | 2016-05-12 | R. Stahl Schaltgeräte GmbH | Flammenschutzfilter aus einer Anzahl von Schichtenfolgen sowie Anordnungen von Flammenschutzfiltern und deren Verwendung |
DE102016000848B3 (de) * | 2016-01-28 | 2017-06-29 | Rexotec Ag | Druckentlastungsvorrichtung |
DE102017112162A1 (de) | 2017-06-01 | 2018-12-06 | R. Stahl Schaltgeräte GmbH | Flammenschutzfilter |
WO2019021039A1 (en) * | 2017-07-28 | 2019-01-31 | Polidoro S.P.A. | BURNER UNIT |
DE102017119982A1 (de) * | 2017-08-31 | 2019-02-28 | R. Stahl Schaltgeräte GmbH | Gehäuse der Schutzart druckfeste Kapselung und Herstellverfahren für dieses |
-
2019
- 2019-05-14 DE DE102019112618.5A patent/DE102019112618A1/de active Pending
-
2020
- 2020-05-05 CN CN202080035548.3A patent/CN113795309B/zh active Active
- 2020-05-05 WO PCT/EP2020/062468 patent/WO2020229235A1/de unknown
- 2020-05-05 EP EP20724469.0A patent/EP3969129A1/de active Pending
- 2020-05-05 US US17/611,077 patent/US20220233989A1/en active Pending
Also Published As
Publication number | Publication date |
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WO2020229235A1 (de) | 2020-11-19 |
CN113795309A (zh) | 2021-12-14 |
CN113795309B (zh) | 2023-07-18 |
US20220233989A1 (en) | 2022-07-28 |
DE102019112618A1 (de) | 2020-11-19 |
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