EP0090415B1 - Druckwellen-Schutzklappen - Google Patents

Druckwellen-Schutzklappen Download PDF

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Publication number
EP0090415B1
EP0090415B1 EP83103125A EP83103125A EP0090415B1 EP 0090415 B1 EP0090415 B1 EP 0090415B1 EP 83103125 A EP83103125 A EP 83103125A EP 83103125 A EP83103125 A EP 83103125A EP 0090415 B1 EP0090415 B1 EP 0090415B1
Authority
EP
European Patent Office
Prior art keywords
flap
laminations
grid
spring
lamination
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
Application number
EP83103125A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0090415A1 (de
Inventor
Wolfgang Dipl.-Ing. Mathewes
Klaus Dr. Dr.-Ing. Fitzner
Uwe Dr. Plitt
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.)
Kraftwerk Union AG
Original Assignee
Kraftwerk Union AG
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 Kraftwerk Union AG filed Critical Kraftwerk Union AG
Publication of EP0090415A1 publication Critical patent/EP0090415A1/de
Application granted granted Critical
Publication of EP0090415B1 publication Critical patent/EP0090415B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/745—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity the air flow rate increasing with an increase of air-current or wind pressure

Definitions

  • the invention relates to a flap for protecting devices through which a gaseous or vaporous medium, in particular air, flows, against pressure waves, according to the preamble of claim 1.
  • the components in ventilation and / or air conditioning systems such as particulate filters in particular, but also the heat exchangers, throttle valves and the component housings and ducts themselves, must be protected against destruction by pressure waves and / or excessive air velocities.
  • the response speed of the flap represents a particular problem; this must have closed without the components to be protected being destroyed.
  • Pressure wave protective flaps are of particular importance for nuclear power plants in their supply and exhaust air systems.
  • the supply air may only flow into the containment in a filtered manner and may only leave it as filtered air.
  • An exhaust air purification and filter system is e.g. described in DE-C-26 25 275; it has a plurality of suspended matter filters to which activated carbon filters are connected upstream or downstream, and it has further post-filters downstream of the downstream activated carbon filters in the direction of the exhaust air stack.
  • a pressure wave protective flap of the type mentioned is known with a frame to be mounted in a ventilation duct, on which the slats, designed as pendulum flaps with a V-shaped cross section and the pivot axis at the apex, by several parallel to each other Axles are pivoted independently of one another, which are acted upon when a certain air speed and / or when the air pressure is too high, thereby automatically closing off the duct cross-section until the air speed and / or air pressure have dropped back to normal.
  • the V-shaped cross section likewise has a V-shaped cross section according to DE-U-7 133 893, which relates to a ventilation window for housings of free-standing transformer stations.
  • the pendulum flap-like slats are pivoted by means of journals on their narrow sides on bearing holes in the frame in such a way that they are pivoted into a closed position by the internal overpressure, in which they overlap each other.
  • the free edges of these pendulum-flap-like slats can be resiliently spring-loaded by a resilient force, namely springs.
  • Strip-shaped lugs made of elastic plastic serve as springs on the end plates having the bearing pins.
  • pressure wave protective flaps A disadvantage of these two known embodiments of pressure wave protective flaps is above all that the individual slats have an intricate profile and, as a result, a considerable overall width and a relatively high weight. When pressure waves and excessive air velocities occur, the reaction of the slats is therefore relatively sluggish.
  • These known pressure wave protective flaps are therefore not usable when it is important to spontaneously protect sensitive components in ventilation and air conditioning systems, such as, for example, suspended matter filters, against mechanical destruction caused by pressure waves occurring and excessive air speed.
  • ventilation and air conditioning systems such as, for example, suspended matter filters
  • overpressure protection flaps are relatively slow; they generally only close when an excess pressure of 1.3 bar is built up, which is sufficient to destroy the sensitive particulate filters.
  • shock valves respond faster, they generally have a closing time of the order of 100 ms, but they are susceptible to contamination, which increases the closing time again.
  • the slats do not consist of profile bodies having a V-shaped cross section, but of flat metal strips or an angled longitudinal edge .
  • the lamellae are only supported in their closed position in their swivel axis area, in which the lamellae with their free ends each overlap the bearing end of the neighboring lamellae, and so the pressure differential forces on the lamellae have to be absorbed by their rotary bearings.
  • this known pressure wave protective flap can only be designed for relatively small pressure differences; because either the sluggish mass of the slats is made small, then there is a risk of bending and damage to the slats if the response speed of the flap is acceptable, or the slats are made more stable, then their response speed is reduced.
  • the present invention is based on the general task of creating a pressure wave protective flap according to the generic term, with which protection of the system components in need of protection against pressure waves and against excessive air speed is possible with a faster response speed or in a shorter response time than with the known pressure wave protective flaps, but without the risk of damaging the laminate.
  • the object is to design a pressure wave protective flap according to the preamble of claim 1 so that closing times (ie the time difference between the impact of the pressure surge on the slats until they close) can be reached, which are below 20 ms and preferably even equal or less than 10 ms are the safe response of the valve down to pressure rise speeds of 0.1 bar / sec.
  • an even more specific task is to ensure that the flap responds at pressure increase speeds in the range of 0.01 bar / sec (corresponding to 10 3 Pa / sec).
  • the construction of the pressure wave protective flap according to the invention should make it possible to avoid the so-called fluttering of the flap or its lamellae, specifically in the range of small as well as high pressure change speeds; furthermore, to ensure reliable protection of the suspended matter filter in filter systems of nuclear power plants against pressure waves and against excessive air speed.
  • the object is achieved with a pressure wave protective flap according to the preamble by the features specified in the characterizing part of claim 1.
  • Embodiments of the invention are set out in dependent claims 2 to 24.
  • the advantages that can be achieved with the invention can be seen above all in the fact that the individual lamellae can be produced from relatively thin and narrow material, and thus with low weight. They therefore respond very easily and quickly to pressure waves and increased air velocities and, due to the special support structure of the downstream support grille, result in a stable closure of the duct cross-section in front of the system area to be protected in their closed position.
  • a preferred lattice construction is specified in claim 3 with intersecting, horizontally and vertically running bars of two groups of bars.
  • the individual slats can be swiveled around horizontal axes; in their closed position they are supported, in particular, overlapping on a neighboring lamella with an overlap area of, for example, 3 mm and, together with the neighboring lamella which they overlap, are supported not only on the associated horizontal lattice bar, but also on the vertical lattice bars, so that also Lightweight slats can withstand large pressure differences.
  • the invention also encompasses other grid configurations, which are covered by claim 1 and will be explained briefly below in the context of the figure description; the right-angled cross bar grid is, however, the preferred embodiment.
  • the leaf spring arrangement is related to the lightweight design of the lamellas.
  • Leaf springs can be made with a very low mass; their mass is negligibly small compared to that of the slats, so that the response or closing time of the flap according to the invention is not noticeably increased by the leaf springs acting on the slats.
  • a favorable number of leaf springs is at least two per lamella, with a single leaf spring having a width (extension in the longitudinal direction of the lamellae) which is about 1/3 to a whole of the division or the spacing of the vertical cross-lattice bars.
  • the restoring moment of the leaf springs must be large enough to more than compensate for the moment of the pressure forces of the normal gas flow acting on the lamellae in the closing direction.
  • the flap With a closing time of about 10 ms and a pressure rise of 0.1 bar / sec overpressure, the flap would therefore have closed at a pressure of 0.015 bar corresponding to 1.5 x 10 3 Pa, assuming that the forces of the return springs are an overpressure of 500 Pa can be compensated.
  • the restoring moment of the leaf springs can also be selected to be smaller, depending on the type of use of the flap, and it can be enlarged.
  • FIG. 1 to 4 show a pressure wave protective flap 1 (hereinafter referred to as protective flap) for installation in or attachment to ducts of ventilation and / or air conditioning systems. It has, see in particular FIG. 1, a frame 2 which is composed of two upright bars 3 arranged in mirror image to one another and two horizontal bars 4 likewise provided in mirror image to one another. All spars 3 and 4 are preferably made of sheet metal by folding, the spars 3 having a substantially C-shaped cross section (FIG. 3) and the spars 4 having a substantially Z-shaped cross section (FIG. 2).
  • a support grid 5 is installed, which is composed of vertical bars 7 and 8 and horizontal bars 9. All bars 7, 8 and 9 consist of relatively thin sheet metal, for example in the thickness between 1 and 3 mm thick.
  • the depth of the support grid is defined by the width b of the horizontal bars 9, it corresponds to the depth of the frame section 10 determined by the closer legs of the horizontal bars 4. It is a multiple, for example six times larger than the respective width 11 of the vertical Lattice bars 7 and 8.
  • the pitch 12 between adjacent, horizontal bars 9 is selected in the exemplary embodiment equal to the pitch 13 between adjacent, vertical bars 7, while the pitch 14 between adjacent, vertical bars 8 (rear lattice plane eO-eO) is three times that The spacing is 12 or 13.
  • the outer longitudinal edge of the vertical bars 7 and the one longitudinal edge of the horizontal bars 9 lie on or in a common plane e-e, which in turn is arranged flush with the Z-webs 4.0 of the horizontal bars 4 of the frame 2, see FIG. 2.
  • the outer longitudinal edge of the vertical lattice bars 8 and the other longitudinal edge of the horizontal lattice bars 9 are also arranged in a common flow-cross plane e0-e0, which is flush with a frame end edge, compare FIGS. 2, 3.
  • a large number of slats 15 are pivotably mounted in the vertical bars 3 of the frame 2.
  • Each individual lamella 15 is formed by a flat or slightly curved (curved) sheet metal strip, the width of which is dimensioned to be greater by the material thickness of a horizontal lattice bar 9 than the pitch 12 between two horizontal lattice bars 9, so that in the closed position an overlap or Overlap with the adjacent horizontal lattice bar and the lower end of the neighboring lamella is ensured. All the slats 15 can be pivoted about parallel, horizontal axes, each tiltable about their lower longitudinal edge 16, between the vertical bars 3 of the frame 2.
  • the sheet metal strips forming the lamellae can each be provided at their ends with a molded nose 17 or an attached pin, which protrude into circular holes 18 which extend into the vertical bars 3 of the frame 2 are located at the level of the horizontal bars 9 of the support grid 5.
  • the material thickness of the sheet metal strips forming the lamella 15 is preferably chosen between 0.5 and 1.0 mm.
  • each lamella 15 engage near its free longitudinal edge a plurality of leaf springs 21, in such a way that they are effective in the plane of the stop webs 20. As indicated in 21.1, they are connected to these by rivets or points in the area of the free longitudinal edge of the slats. With their other end, these leaf springs 21 lie freely on the upper side of the horizontal lattice bar 9 adjacent to the respective tilt axis 16, 17, see in particular FIG. 2, Fig. 4.
  • Each leaf spring 21 can be made of spring steel strip, which preferably has a thickness of about 0.2 mm. The width of the spring steel strip, on the other hand, is chosen differently depending on the desired spring force. Widths between 20 and 30 mm have proven successful.
  • All components of the protective flap 1 are expediently made of non-rusting material, e.g. Light metal, stainless steel or titanium alloys. This material recommendation applies to the slats 15 and also to the support grid including its frame construction.
  • the fins 15 are pressed against the force of the leaf springs 21 into the position shown in dashed lines in FIG. 4 on their seats and thus the protective flap 1 is closed. With pressure waves of the order of 1.25 bar, closing times of the protective flap for this process of less than 6 ms could be achieved.
  • the support grid 5 absorbs the compressive forces acting on them, the relatively small distances between the individual bars 7 and 9 contributing to the fact that the slats 15 withstand the local pressure load despite their small thickness and light weight.
  • the horizontal lattice bars 9 have an extension b in the flow direction 22 (cf. FIG. 3) which is a multiple of the width a (see FIG. 4) of the narrowest flow cross section between adjacent fins 15, this narrowest flow cross section being the same corresponds to the smallest distance between adjacent slats 15 in their open position.
  • the support lattice depth b of the horizontal lattice bars 9 must therefore be at least the same, but preferably greater, and indeed several times greater than the lattice depth of the vertical lattice bars 7, 8.
  • the engagement of the lattice bars is expediently carried out alternately by means of slots and webs, in order to build up a stable supporting lattice field.
  • the arrangement can be such that the depth of the slots 9.1 and 9.2 is only half the bar width of the vertical bars 7 and 8 and the latter are also provided with a slit at half their width, so that according to the so-called egg crate principle, a mutual , positive engagement between slots of one group of bars and webs of the other group of bars.
  • the grille bars are arranged upright in the flow direction 22.
  • the pitch 12 of the support grid 5 is, as mentioned, matched to the strip width of the slats.
  • the relatively light and flexible slats can now be installed in common protective flaps with support grid side lengths of the order of 500 mm or more, because the support grid is not only made of bars one direction, but is also equipped with this second group of bars crossing second bars, whereby a multiplicity of additional support points, distributed over the length of the slats, are obtained.
  • the spacing 13 of the vertical grating bars 7 from one another with increasing pressure load the slats 15 is chosen to be smaller. In the example shown, it is in particular approximately equal to the pitch 12 between the horizontal bars 9, so that one can speak of a square support grid.
  • the spacing distance 13 were to decrease even further with a greater pressure load, this would result in a rectangular support grid with an increased number correspondingly distributed over the lamella length and formed by the vertical rods 7.
  • this is provided with a coating after the assembly (not shown in detail).
  • This coating can e.g. applied by spraying or dipping, it can be made of a suitable plastic or a coating metal, e.g. Zinc, or a paint.
  • force application points 21.1 and 21.2 one is designed as a spring attachment and the other as a spring sliding seat.
  • the embodiment shown is particularly favorable, in which the leaf spring 21 is fastened at one end to the slat at 21.1 and is slidably guided at the other end on the facing flat side of the adjacent, horizontal lamella rod 9 running parallel to the slats, i.e. Force application point 21.1 is the attachment point, force application point 21.2 is the spring sliding seat.
  • a relatively low bending stress of the spring occurs during the closing process, which has a life-extending effect, and in the case of aluminum slats 15, sliding or sliding of the spring steel on the slat is avoided.
  • FIGS. 5 to 10 corresponds in principle to that according to the first exemplary embodiment (FIGS. 1 to 4), but with the following detailed modifications:
  • the protective flap A1 is installed in a channel section 23 which, viewed in the direction of flow 22, has a multiple of the depth of the protective flap AI. It is provided at both ends with end flanges 23.1 and 23.2 with which it can be flanged to ducts or components of the ventilation or air conditioning systems.
  • the parts of FIGS. 5 to 10 which are similar to the first exemplary embodiment are identified by the same Arabic numerals, but preceded by the capital letter A. It can be seen that the support grid designated as a whole with A5 (FIG. 7) between its two levels ee (inflow side) and e0-e0 (outflow side) is somewhat shorter or less deep than the support grid according to the first exemplary embodiment, so that only which uses a kind of vertical bars A7.
  • FIGS. 5 and 9 A modification can be seen from FIGS. 5 and 9:
  • the slats A15 are articulated to the support grid A5 in the region of their longitudinal sides A15u close to the swivel axis, at least in a plurality of articulation points 24 distributed over their length.
  • thirteen vertical bars A7 are used, accordingly, thirteen hinge points of the type shown in FIG. 9 could be provided per lamella A15 a h.
  • These are designed in such a way that the slats A15 are angled on their long axis A15u near the pivot axis, as shown, the angling A15.1 (short leg) being about 1/10 to 1/5 the length of the longer slat leg A15.2 .
  • the lamellae A15 engage in groove-shaped recesses 25 of lattice bars running across the lamellae and, in the example shown, also vertical lattice bars A7 such that they are pivotably guided in the manner of cutting edges.
  • the closed position of the slats A15 is also indicated in dashed lines in FIG. 9: In the closed position A15 ', the angled portion A15.1 lies on the underside of the horizontal lattice bars A9, and the longer slat leg A15.1 overlaps with the Neighboring lamella arranged above it on the line h1 and with the edge of the associated horizontal lattice bar on the line h2.
  • the pivot bearing is supplemented by the leaf spring arrangement A21, which corresponds to that according to FIG. 4, and by the stop web A20, which in this embodiment has stop surfaces A20.1, which are formed by sawtooth-shaped recesses on the stop web A20 and their inclination to the desired Tilt angle a (see FIG. 4) corresponds to the slats, so that in the open position shown there is a flat contact and support of the slats A15.
  • two stop webs A20 are also provided, which are firmly connected to the lattice frame A2 and with their narrow sides pointing in the direction of flow 22 and viewed in the pressure surge direction before Lamella array are arranged (see also Fig. 5, 6 and 8).
  • These stop bars are designed as angle strips, which are screwed at their upper and lower ends (see FIGS. 6 and 8) to mounting brackets 26, the latter being welded to the horizontal frame bars A4.
  • the vertical stop bars A20 also serve to support a test device, designated as a whole as 27, for the closing function of the slats A15. Specifically, the test device 27 (cf. FIGS.
  • the stop webs A20 serve, as can be seen, for the rotatable mounting of the shaft 27.2 of the knife-shaped actuator 27.1; for this purpose they are provided with corresponding bearing bushes 27.3 or bushings 27.4. Another bearing bush with shaft bushing is shown on the wall 23.3 of the channel section 23 at 27.5.
  • This bearing bush is welded to the duct wall.
  • the shaft 27.2 leads through them to the outside.
  • the outwardly projecting end of the shaft 27.2 is provided with an actuating lever 27.6, which is fixed in its illustrated central zero position, for example by a bolt 29, by means of a bracket 28 which is approximately Z-shaped in cross section and which is welded onto the outside of the channel flange 23.1. which is inserted through corresponding holes in the bracket 28 and the free end of the actuating lever 27.6.
  • the frame construction of the second embodiment is somewhat different from that of the first example, for which reference is made in particular to FIGS. 5, 8 and 10.
  • angled holding brackets 30 are welded to one leg 30.1, so that the other leg 30.2 of the holding brackets 30 projecting into the interior of the channel forms a fastening plane for the supporting grid construction (plane eO-eO).
  • the vertical spars A3 which have a U-profile with an unequal leg length, are screwed to their base on this fastening plane of the holding iron 30 (FIG. 10).
  • the grid frame A2 is completed by the horizontal spars A4, which are connected to the upper and lower ends of the vertical spars A3 in a manner that cannot be seen in more detail, e.g. are screwed or welded.
  • the side flanks of the vertical bars A3, namely their longer U-legs, thus form fastening surfaces for the horizontal lattice bars A9, which are screwed to the side flanks of the vertical bars A3 with bends A9.1 of their ends (FIG. 10).
  • the design of the vertical spars A3 as U-profile rods allows the formation of lateral housing pockets or spaces 31 which, as explained below with reference to FIG. 14, can advantageously serve to accommodate damping devices for the slats A15. In this case, the long U-leg of the vertical bars A3 is shortened somewhat so that the damping device can engage laterally on the end faces of the slats A15.
  • the mode of operation of the test device 27 is such that when the actuating lever 27.6 is pivoted upward, the knife-shaped actuator 27.1 comes into engagement with the upper half of the lamella field and presses these lamellae into their closed position. Since the lower, initially still open slat field half must allow twice the flow rate to flow, the flow speed doubles and the dynamic pressure increases, so that the lower slat field half now goes into the closed position if it functions properly. Accordingly, the functionality of the upper half of the slats can be checked by pivoting the knife-shaped actuator 27 into the lower closed position, so that the test device 27 is a simple, reliably working device with which the smooth movement of the slats can be easily checked. This test is of course only short-term and therefore practically does not interfere with operation - assuming that several protective flaps connected in parallel are used, as usual.
  • FIG. 11 shows a third exemplary embodiment of the lamella mounting, in which leaf springs B21 are structurally combined with the lamellae B15 and the lamella-leaf spring unit B15-B21 with the end of a free leaf spring piece B21.1 projecting beyond the lamella surface with formation a spring joint B24 is attached to the support grid A5.
  • a thickened or bent leaf spring end B21.2 is caught in groove-shaped recesses B25 of lattice bars A7 running across lamella by cross pins B32 inserted into the groove-shaped recesses, with partial wrap of the latter, the transverse pin B32 forming the hinge axis around which the lamella-leaf spring unit B15 - B21 is pivotable.
  • the lamellae C15 are fixed to the support with articulated eyes C33 formed by flanges. Articulated C32 lamella axially parallel articulated.
  • the mounting of the leaf spring C21 is alternating from that according to Fig.4 and Fig.9 so that the leaf spring end C21.1 can slide on the slats C15 (sliding engagement) and the other leaf spring end C21.2 in slots C34.1 one additional vertical bar C34 firmly connected to the support grid is positively attached.
  • the lamellae C15 are further provided on their free longitudinal sides C15 o with obtuse-angled bends C15.3, with which they rest in the closed position (shown in FIG. 12 above) on the articulated eyes C33 of the neighboring lamella.
  • These bends C15.3 could be omitted if the hinge pins C32 ran parallel to the lamellae through groove-shaped recesses, as in the example according to FIG. 11.
  • FIG. 13 A cutout of a fifth exemplary embodiment of a suitable slat mounting is shown in FIG. 13, in which the slats D15 consist of tough-elastic plastic and the slat joint is formed by a flexible slat skin D35 with a weaker cross section, which is the actual slat D15 with a fastening part D36 connects, which is also fixed in a groove-shaped recess D25 on the support grid.
  • D9 are the horizontal bars again, D7 the vertical bars.
  • the attachment can be facilitated by cams D36.1 on the attachment part D36 and associated beads on the wall of the groove-shaped recess D25 in the sense of an easily produced snap connection.
  • the protective flap according to the invention responds relatively quickly, measures to prevent fluttering are particularly important in the event of a response.
  • An important measure is that the slats 15, A15, etc. are spring-loaded individually or in groups with different characteristics, so that they come out of phase with each other in response to the response to the closed position.
  • this measure can be implemented relatively simply in that leaf springs 21, A21 etc. of different spring characteristics are coupled as return springs to the lamellae individually or in groups, the different spring stiffnesses of which are produced thereby can that the leaf spring width, ie the extension of the leaf springs in the longitudinal direction of the slats is varied.
  • FIG. 14 A further advantageous and effective measure which can be used in combination with the variation of the spring stiffness explained above is shown in FIG. 14.
  • this involves the generation of spring forces P F of a defined size acting on the side flanks of the slats A15 in order to generate friction damping on the slats A15 during their closing movement.
  • approximately vertical U-shaped spring guide rails A36 are arranged on the vertical frame parts A3 of the support grid A5 adjacent to the lamella side flanks A15.4 and with their U legs A36.1, A36.2 facing them.
  • the spring guide rail A36 also has a mounting leg A36.3, with which it is connected to the vertical frame part, in particular is screwed tight.
  • a friction cross-section A37 which is also approximately U-shaped, is movably guided in the longitudinal direction of the lamella and its flat base A37.0 faces the lamella side flanks A15.4. It is also slidably guided with its U-legs A37.1 and A37.2 on the corresponding U-legs A36.1, A36.2 of the spring guide rail A36. Between spring guide and friction rails A36, A37 spring elements A38 are arranged, by means of which the friction rail A37 can be pressed over its entire length against the side flanks A15.4 of the slats A15 with a defined pressing force.
  • helical compression springs are used as spring elements, which are distributed evenly over the length of the spring guide rail A36 and are mounted in corresponding receiving chambers A39.
  • the receiving chambers A39 can be formed by cylindrical or pot-shaped parts which are connected to the bottom of the spring guide rail A36, for example by spot welding. It is easy to control the frictional forces by the number and spring stiffness of the spring elements A38. If only the left end of a support grid with lamella is shown in FIG. 14, corresponding to the representation in FIG. 10, it is understood that the damping arrangement according to FIG.
  • the measures of varying the spring stiffness for the slats individually or in groups and the measures described in FIG. 14 for damping the movement of the slats, either individually or in combination, are completely sufficient, to prevent the slats from fluttering.
  • a braking device can be advantageous, which can be used as an additional device both in the first and in the second embodiment. It is a braking device with at least one brake crossbar A40, which is mounted on the frame structure A2, namely by means of a crossbeam A3.0, in the closed and open positions of the disks A15 and can be moved back and forth according to arrow A 41, which is in its Rest position R (shown) touches the free longitudinal edges of the plates A15 and in their braking position - see the arcs A42 around the pivot bearing points A43 - lies flat on the closed plates.
  • the brake crossmember A40 has such an effective area exposed to the pressure surge A22 that it comes into the closed position together with the plates A15, means being provided for the brake crossmember A40 in its braking position for at least a period of 0.5 to several seconds in braking engagement to leave.
  • the brake crossmember A40 is advantageously articulated via a dead center gear A44 to the frame structure A2 or to the carrying crossbar A3.0 connected to it, and assumes an over-dead center position when the brake is engaged.
  • the brake crossbar A40 is articulated in the example shown by means of parallelogram linkage A45 to the support crossbar A3.0 arranged parallel to it.
  • the articulation points of the parallelogram linkage A45 with respect to the crossbeam are designated with A43 and those with regard to the brake crossbar with A43.1.
  • dead-center springs designed as helical tension springs A47 (only shown in the upper part of FIG. 15) are attached, which engage with their other end at the articulation points A43.1 between the brake crossbar A40 and the parallelogram lever A45.
  • the brake crossmember A40 assumes a position which is defined by the dashed circular arcs, the pivot point positions indicated at A43.1 'and the brake crossmember contour shown in dashed lines at A40'.
  • timing element A48 which triggers when the brake crossbar A40 responds and, after the specified delay time has elapsed, triggers an energy accumulator charged due to the closing movement of the brake crossbar for returning the brake crossbar to its rest position.
  • a timer A48 which can be a mechanically or mechanically hydraulic timer, in the manner of the self-timer in cameras.
  • the brake crossmember A40 moves towards the plunger A48.1 of the timing element A48 during its closing movement according to arrow A49 and presses this plunger against the force of a force storage spring into the housing of the timing element A48, as a result of which a housing is arranged in this housing and through it Tensioning process triggered delay gear begins to work and after the desired delay time pushes the plunger A48.1 back out of the housing using the force of the energy storage spring, so that the brake crossbar A40 moves against the force of the dead center springs A47 beyond the dead center and thus automatically into its rest position R can be brought.
  • the stop bars A20 could be used to attach this braking device.
  • FIG. 16 and 17 show a few support grid configurations, namely FIG. 16 a support grid F5, which has horizontal grid bars F9 and, in contrast, grid bars F7 running obliquely to form rhombic grid fields, and finally FIG. 17 a support grid G5 within a frame G2 with rectangular or square-concentric grating bars G9 of a first bar group and radially extending bars G7 of a second bar group crossing this first bar group.
  • the flap works as a protective flap against pressure surges, the direction of which coincides with the direction of the gaseous media flowing through the open protective flap from the slats to the support grid during normal operation (flow direction 22).
  • the protective flap can also serve as a non-return flap, whereby the gaseous media flowing through the open flap in normal direction in normal operation, namely from the support grille to the slats, hold the slats against their stops and the slats into the reversing flow in the event of a fault Closed position are movable against their support grid seats. Since the protective flap according to the invention, as shown in particular in FIG.
  • the protective flap according to the invention is therefore very versatile, which ensures inexpensive manufacture due to the large number of pieces due to the same construction elements.
  • a further exemplary embodiment are on both sides of the support grid 7, 9 or A7, A9, ie also on the support grid side facing away from the slats 15, A15, further slats of the protective flap are arranged, a pressure wave protection function then being provided in both directions, or the one slat field then acting as pressure wave protection -and the other as a check valve and vice versa.
  • This embodiment results without further ado when considering FIG. 2 or FIGS. 5, 9, if one considers the lamella fields 15 or A15 5 to be mirrored about a flow-normal support grid symmetry plane or thinks point-symmetrically shifted to the other support grid end surface.
  • the double pressure wave protective flap by connecting two supporting grids in series in the flow direction and assigning a lamella field to each supporting grid on its outside or on its side facing away from the neighboring supporting grid.
  • Preference is given, however, to the above-mentioned embodiment of a double pressure-wave protective flap with only one supporting grille and one lamella field on each of the two supporting grille sides pointing in the direction of flow or opposite thereto because of the more compact construction and material savings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air-Flow Control Members (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP83103125A 1982-03-29 1983-03-29 Druckwellen-Schutzklappen Expired EP0090415B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19828208932U DE8208932U1 (de) 1982-03-29 1982-03-29 Druckwellen-schutzklappe fuer kanaele von lueftungs- und/oder klimaanlagen
DE8208932U 1982-03-29

Publications (2)

Publication Number Publication Date
EP0090415A1 EP0090415A1 (de) 1983-10-05
EP0090415B1 true EP0090415B1 (de) 1986-06-11

Family

ID=6738535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103125A Expired EP0090415B1 (de) 1982-03-29 1983-03-29 Druckwellen-Schutzklappen

Country Status (5)

Country Link
US (1) US4576088A (ja)
EP (1) EP0090415B1 (ja)
JP (1) JPS59500425A (ja)
DE (2) DE8208932U1 (ja)
WO (1) WO1983003462A1 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5137231A (en) * 1991-04-29 1992-08-11 The Boeing Company Decompression venting grille for aircraft
FR2725769A1 (fr) * 1994-10-12 1996-04-19 Abb Flakt Regulateur de debit perfectionne, notamment pour installation de ventilation ou de climatisation
US6149515A (en) * 1998-10-16 2000-11-21 Tomkins Industries, Inc. Combination moisture elimination louver and air flow sensor and method
US6427310B1 (en) * 2000-02-15 2002-08-06 Eastman Kodak Company Method for fabricating a print engine chassis for supporting an imaging drum and printhead translation assembly
US7624732B2 (en) * 2005-10-06 2009-12-01 The Boeing Company Method and apparatus for extending flight crew's time of useful consciousness after decompression
DE102007061433B4 (de) * 2007-12-20 2012-10-25 Airbus Operations Gmbh Verbesserte Dekompressionseinrichtung mit einem einstellbaren Auslösedruck
FI123213B (fi) * 2008-05-09 2012-12-31 Temet Oy Paineventtiili
DE102008040462B4 (de) 2008-07-16 2013-09-12 Sommer Metallbau-Stahlbau Gmbh & Co. Kg Druckstoßklappe
GB2526507B (en) * 2013-01-07 2022-05-25 Scott Ross Alexander Emergency roofing and barrier system
NZ709141A (en) * 2013-03-14 2019-08-30 Hunter Douglas Shutter panel for an architectural opening
CN103277860A (zh) * 2013-06-14 2013-09-04 苏州原点工业设计有限公司 一种设有挂钩的冷风机
EP2980346A1 (en) 2014-07-31 2016-02-03 Hunter Douglas Industries B.V. Shutter assembly
IL247805B (en) 2016-09-13 2022-05-01 Beth El Zikhron Yaaqov Ind Ltd Wing-based explosion valve in an aeronautical structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB569013A (en) * 1943-05-13 1945-05-01 Leonard Gordon Davies Improvements relating to ventilators and to the control of flow of fluids
US2965014A (en) * 1958-09-02 1960-12-20 Lowery Charley Vent closing louver apparatus
DE1227345B (de) * 1960-11-08 1966-10-20 Ewers & Miesner Hartgusswerk Selbsttaetige Verschlussvorrichtung fuer Be- und Entlueftungsleitungen von Schutzraeumen
CH427514A (de) * 1963-04-18 1966-12-31 Luwa Ag Schnellschlussvorrichtung an Luftdurchlassöffnungen für Schutzräume
NL140030B (nl) * 1967-05-03 1973-10-15 Dejo Metaalindustrie N V Rooster met elkander snijdende langs- en dwarsstaven.
DE7133893U (de) * 1971-09-06 1972-11-23 F Driescher Spezialfab Fuer Elektrizitaetswerksbedarf Lüftungsfenster für Transformator-Stationen
US4167898A (en) * 1976-01-06 1979-09-18 Barcant Kevin C Illumination and ventilation system for buildings
DE2839998A1 (de) * 1978-09-14 1980-04-03 Betonbau Gmbh Luefterelement zum einbau in die aussenwand eines gebaeudes
ZW3586A1 (en) * 1985-03-12 1986-06-11 Bayer Ag Macroemulsions

Also Published As

Publication number Publication date
WO1983003462A1 (en) 1983-10-13
DE8208932U1 (de) 1982-08-12
JPS6238618B2 (ja) 1987-08-19
JPS59500425A (ja) 1984-03-15
DE3364041D1 (en) 1986-07-17
EP0090415A1 (de) 1983-10-05
US4576088A (en) 1986-03-18

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