EP0824027B1 - Explosionsschutzvorrichtung mit elektrischer Auslösung - Google Patents
Explosionsschutzvorrichtung mit elektrischer Auslösung Download PDFInfo
- Publication number
- EP0824027B1 EP0824027B1 EP97810343A EP97810343A EP0824027B1 EP 0824027 B1 EP0824027 B1 EP 0824027B1 EP 97810343 A EP97810343 A EP 97810343A EP 97810343 A EP97810343 A EP 97810343A EP 0824027 B1 EP0824027 B1 EP 0824027B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- explosion protection
- piston
- protection apparatus
- closing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
Definitions
- the present invention relates to an explosion protection device for installation in potentially explosive industrial plants, as in the preamble of the independent claim 1 is defined.
- explosion protection devices such as. quick-closing valves or pusher, used to break through Pressure waves and flames from a potentially explosive system part prevent in neighboring parts of the plant.
- the pressure generator is either a pyrotechnic Element with an electrically ignitable powder filling or a compressed gas cartridge, which is powered by an electric ignitable detonator that releases pressurized gas. It is therefore a realistic test of the pressure generator again not possible.
- Pyrotechnic detonators also have the major disadvantage that they fall under the arms law in some countries what commercialization at least difficult. Also require they break the wire from the sensor to Detonator to ensure safe explosion protection.
- DE-C1-43 16 584 describes a device for shutting off of connected to house connections and charged with gases Supply lines known to be one in one Has housing arranged locking member which by a Release device in the basic state in its open position is held.
- the locking organ is by means of a Compression spring preloaded so that after actuation of the release device is moved into its closed position.
- the triggering device is actuated by switching of a solenoid valve, controlled by one with the solenoid valve connected control center depending on Gas detectors, smoke detectors, temperature sensors and / or one Flow switch signals received.
- This shut-off device is not a purpose Explosion protection device and consequently not on it aligned, possibly due to an explosion to achieve fast closing time.
- the magnetic valve For actuating the release device the magnetic valve must first have a magnetic field be built up, which takes at least about 50 ms. This is far too slow for an explosion protection device.
- this shut-off device is not one Explosion protection device is the generic term of independent claim 1 related thereto.
- the essence of the invention is that in an explosion protection device for installation in potentially explosive atmospheres Industrial plants in order to prevent the Penetration of pressure wave and / or flame by an explosive Plant part in neighboring plant parts a trigger device biased in its basic state and comprises a magnet that holds a trigger device active magnetic field in its basic state having.
- the explosion protection device comprises at least a locking device that separates the person to be protected Plant part and the potentially explosive plant part can be arranged is from the release device in its basic state is held in its open position and thus preloaded is that after actuation of the release device in its closed position is moved.
- the the closing organ after actuation of the release device in its closed position moving preload is generated by compressed gas.
- the trigger device is electrically connected to a Explosion detection sensor in the potentially explosive atmosphere Plant part can be arranged or connected to the same is, and actuated by sensor signals.
- the explosion protection device comes without using a pyrotechnic Detonator.
- the electromagnetic release of the Closing movement and the preload of the closing element can have short closing times even without a pyrotechnic igniter can be achieved.
- the fact that the trigger device biased in by the active magnetic field of the magnet its basic state is maintained and only that to operate already existing magnetic field is reduced and not first The magnetic field must be built up are the closing times also considerably shorter than with triggering devices with solenoid valves.
- the explosion protection device according to the invention is repeated testable since none when the closing movement is triggered irreversible steps are taken.
- Electromagnet used the triggering device when power is supplied holds in its basic state, causing the locking organ is held in its open position.
- the electromagnet is supplied with power as long as the release device receives signals from the sensor that say that still no explosion occurred. An explosion occurs or occurs between due to a defect in the wire Sensor and triggering device no correct signal transmission, a closing movement is triggered.
- This variant has the advantage that there is no wire monitoring is necessary to ensure safe explosion protection to ensure. However, wire monitoring can optionally used to prevent false tripping become.
- explosion protection device Usually attached to a pipe section 8 explosion protection device has a trigger device 1 with a Housing 10 in which an annular electromagnet 5 is arranged is. A wire 11 is used to supply power to the electromagnet 5, which by a sensor, not shown, for Explosion detection of a known type, in particular a pressure or Infrared sensor located in a neighboring hazardous area Plant part arranged or connected to the same is controlled.
- a locking member 2 extends perpendicular to the central axis 81 of the pipe section 8 almost to this.
- the Locking element 2 is on the one hand in the triggering device 1 and on the other hand in a support device 22, the also serves as a locking housing, stored and is by the electromagnet 5 by electromagnetic attraction a metal plate firmly connected to the locking member 2 12 pushed in the direction of the central tube section 81, when 5 current is supplied to the electromagnet.
- the end of the locking member facing the tube central axis 81 2 is for holding a holding element 37 U-shaped, with the opening to the pipe center axis 81 out.
- a cylinder 33 is fixed between the support device 22 and a support device 38, in which a piston 31 is movably mounted.
- ring seals 311, 312 are arranged, which provide a seal against the inner wall of the cylinder.
- the cylinder 33 is divided by the piston 31 into a first chamber 34, which is under a relatively low pressure p 1 , and a second chamber 35, which is under a higher pressure p 2 than the first chamber 34. Due to the excess pressure in the second chamber 35, which is, for example, approximately 6 bar, the piston 31 would be moved towards the support device 38 if it were not retained. The piston 31 is therefore preloaded.
- a compressed gas reservoir 36 which is toroidal around the cylinder 33 is arranged around and via cylinder openings 330 with the second chamber 35 communicates, ensures the piston movement to the support device 38, with an increase in volume the second chamber 35 is connected for sufficient overpressure in the second chamber 35.
- a curved closing member 3 is over a first piston rod 30 connected to one side of the piston 31, so that it is moved when the piston moves.
- the locking device 3 is provided with a sealing flange 39, which is in the closed position on a ring seal delimiting the pipe opening 82 83 comes to rest, so that the Pipe opening 82 is guaranteed.
- ring seal 380 is reached, that in the working position in which the sealing flange 39 bears on the support device 38, no dirt in the Space between the locking device 3 and the support device 38 can penetrate.
- the explosion protection device described works as follows:
- the electromagnet 5 In the working position shown with solid lines the electromagnet 5 is supplied with current as long as how the trigger device 1 receives signals from the sensor, which say that no explosion has yet been detected.
- the Electromagnet 5 presses the locking member 2 towards the pipe center axis 81 out.
- the locking member 2 in its U-shaped end engages the holding element 37, holds via the second piston rod 32, the piston 31 and the first Piston rod 30, the closing member 3 in its open Position. Any process gas can be in the pipe opening 82 and flow through the pipe section 8.
- the locking member 2 is by the spring 7 from the pipe center axis 81 moved away, the U-shaped end of the locking member 2 releases the holding element 37 and by the overpressure in the second chamber 35, which is maintained by means of the compressed gas reservoir 36 the piston 31 becomes the support device 38 and thus the closing member 3 moves towards the pipe opening 82, until it reaches its closed position, i.e. the sealing flange 39 lies tightly against the ring seal 83.
- the pipe opening 82 is then tightly sealed and striking through Blast and flame of the explosion are prevented.
- the closing position of the closing member 3 and the piston 31 is shown in dashed lines in Fig. 1.
- a pipe section 8 ' In a pipe section 8 'are two in opposite directions closing axial valves arranged the same are constructed like the axial valve shown in FIG. 1.
- the reference numbers 3 ', 13'-15', 30'-35 ', 37'-39', 82 ', 83', 311 ', 312', 330 'and 380' denote elements 3, 13-15, 30-35, 37-39, 82, 83, 311, 312, 330 and 380 respectively Elements.
- a compressed gas storage 36 ' is both around the Cylinder 33 and around the cylinder 33 'toroidal arranged. The closing movements are triggered as with the first variant.
- This second embodiment variant has the advantage that Closing movements in two opposite directions respectively. This ensures that always a closing movement from the blast of the explosion is supported.
- the explosion protection device has a slider instead of an axial valve.
- the Closing member 4 is in turn via a first piston rod 40, a piston 41 with ring seals 411, 412 and one second piston rod 42 with holding element 47 from a locking member 2 with a U-shaped end in its open position held.
- the cylinder 43 belonging to the piston 41 becomes from this into a first chamber 44 and a second chamber 45 divided and is between the support device 22 and a support device 48 is arranged.
- the release device 1 and the mode of operation of the explosion protection device is essentially the same as the first two Design variants, except that here the locking element 4 from the side via a pipe opening 802 of a pipe section 80 is pushed and the overpressure in the second chamber 45 by means of a pressure gas storage, not shown a compressed air duct 360 is maintained.
- This embodiment variant corresponds to the triggering device 1 'of that shown in Fig. 3, which is Closing member 4 is here in the closed position.
- the trigger device 1 has instead of an electromagnet 5 a permanent magnet 6, which is the locking member 2 by electromagnetic repulsion with one Locking member 2 firmly connected metal plate 12 'as long against the bias generated by the spring 7 in its locked position lasts until an explosion from the sensor is signaled.
- the permanent magnet 6 is compensated for by current supply, wherein when they are inserted, the locking member 2 is actuated by the spring preload.
- a piston rod 30 " is attached to a piston 31" arranged in a cylinder 33 ", the interior of the cylinder 33” through the piston 31 "into a first chamber 34", to which the piston rod 30 "is assigned and the is under a relatively low pressure p 1 , and a second chamber 35 ", which is under a pressure p 2 which is greater in comparison with the first chamber 34", is divided.
- a trigger device 1 is fixed in place, which by means of a ring-shaped electromagnet 5 "keeps the closing element 3 in its open position via the piston rod 30" and the piston 31 “by electromagnetically pulling the piston 31" as long as the electromagnet 5 "is supplied with current.
- the current is supplied via an electrical line 16, which is inserted through the support device 22 "into the cylinder 33", and is controlled by the sensor signals, as in the embodiment variants described above.
- the electromagnet loses 5 "its attraction and the closing element 3 is through the pressure in the second chamber 35 "compared to first chamber 34 "moved into its closed position. Again provides the compressed gas reservoir 36, the cylinder openings 330 "communicates with the second chamber 35" during the whole movement of the locking mechanism 3 for one sufficient overpressure in the second chamber 35 ".
Description
- Fig. 1 -
- eine Schnittansicht einer an einem Rohrstück angebrachten Explosionsschutzvorrichtung mit einseitig schliessendem Axialventil;
- Fig. 2 -
- eine Schnittansicht einer an einem Rohrstück angebrachten Explosionsschutzvorrichtung mit zweiseitig schliessenden Axialventilen;
- Fig. 3 -
- eine Schnittansicht einer seitlich eines Rohrstücks angeordneten Explosionsschutzvorrichtung mit einem Schieber in offener Stellung und einer Auslöseeinrichtung mit einem Elektromagnet;
- Fig. 4 -
- eine Schnittansicht einer seitlich eines Rohrstücks angeordneten Explosionsschutzvorrichtung mit einem Schieber in Schliessstellung und einer Auslöseeinrichtung mit einem Permanentmagnet und
- Fig. 5 -
- eine Schnittansicht einer an einem Rohrstück angebrachten Explosionsschutzvorrichtung mit einseitig schliessendem Axialventil und einer alternativen Auslöseeinrichtung.
Claims (12)
- Explosionsschutzvorrichtung zum Einbau in explosionsgefährdete Industrieanlagen zwecks selbsttätigen Verhinderns des Durchschlagens von Druckwelle und/oder Flamme von einem explosionsgefährdeten Anlageteil in benachbarte Anlageteile, mit einem Sensor zur Explosionserkennung, der in dem explosionsgefährdeten Anlageteil anordbar bzw. mit demselben verbindbar ist, mindestens einem Schliessorgan (3, 3', 4), das zwischen dem zu schützenden Anlageteil und dem explosionsgefährdeten Anlageteil anordbar ist, und einer Auslöseeinrichtung (1, 1', 1"), die einen Magneten (5, 5", 6) aufweist, in ihrem Grundzustand das Schliessorgan (3, 3', 4) in seiner offenen Stellung hält, elektrisch mit dem Sensor verbunden ist und durch Sensorsignale betätigbar ist, wobei das Schliessorgan (3, 3', 4) so vorbelastet ist, dass es nach Betätigung der Auslöseeinrichtung (1, 1', 1") in seine Schliessstellung bewegt wird, und wobei die Explosionsschutzvorrichtung ohne Verwendung eines pyrotechnischen Zünders auskommt, dadurch gekennzeichnet, dass die Auslöseeinrichtung (1, 1', 1") in ihrem Grundzustand vorgespannt ist und der Magnet (5, 5", 6) ein zum Halten der Auslöseeinrichtung (1, 1', 1") in ihrem Grundzustand aktives Magnetfeld aufweist, und dadurch, dass die das Schliessorgan (3, 3', 4) nach Betätigung der Auslöseeinrichtung (1, 1', 1") in seine Schliessstellung bewegende Vorbelastung durch Druckgas erzeugt ist.
- Explosionsschutzvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Magnet ein Elektromagnet (5, 5") ist, der bei Stromzufuhr die Auslöseeinrichtung (1, 1") in ihrem Grundzustand hält und bei Stromunterbruch die Auslöseeinrichtung (1, 1") betätigt.
- Explosionsschutzvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Magnet ein Permanentmagnet (6) ist, der die Auslöseeinrichtung (1') solange in ihrem Grundzustand hält, als kein Strom zugeführt wird.
- Explosionsschutzvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass hinter dem genannten Magneten (5, 5", 6) mindestens ein weiterer Magnet angeordnet ist, der die Kraft zum Halten der Auslöseeinrichtung (1, 1', 1") in ihrem Grundzustand vergrössert, wobei die Stromzuführung zu den Magneten parallel erfolgt.
- Explosionsschutzvorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Sensor ein Druckoder Infrarotsensor ist und bei Erkennung einer Explosion die Stromzufuhr zu dem oder den Elektromagneten (5, 5") unterbricht bzw. bewirkt, dass dem oder den Permanentmagneten (6) Strom zugeführt wird.
- Explosionsschutzvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass sie mit einer Drahtüberwachungseinrichtung zur Überwachung der elektrischen Drähte zwischen Sensor und Auslöseeinrichtung (1, 1', 1") versehen ist.
- Explosionsschutzvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Auslöseeinrichtung (1, 1') in ihrem Grundzustand ein Verriegelungsorgan (2) gegen eine Vorspannung, die durch eine Feder (7) erzeugt sein kann, in seiner Verriegelungsstellung hält, in der dieses das Schliessorgan (3, 3', 4) in seiner offenen Stellung hält, derart, dass durch Betätigung der Auslöseeinrichtung (1, 1') das Verriegelungsorgan (2) betätigt und das Schliessorgan (3, 3', 4) in seine Schliessstellung bewegt wird.
- Explosionsschutzvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das Schliessorgan (3, 3', 4) über eine erste Kolbenstange (30, 30', 40), einen Kolben (31, 31', 41) und eine zweite Kolbenstange (32, 32', 42), die zumindest teilweise innerhalb eines dazugehörigen, ortsfesten Zylinders (33, 33', 43) bewegbar angeordnet sind, vom sich in der Verriegelungsstellung befindlichen Verriegelungsorgan (2) in seiner offenen Stellung gehalten wird, wobei das Innere des Zylinders (33, 33', 43) durch den Kolben (31, 31', 41) in eine erste Kammer (34, 34', 44), der die erste Kolbenstange (30, 30', 40) zugeordnet ist und die unter einem relativ niederen Druck (p1) steht, und eine zweite Kammer (35, 35', 45), der die zweite Kolbenstange (32, 32', 42) zugeordnet ist und die unter einem im Vergleich zur ersten Kammer (34, 34', 44) grösseren Druck (p2) steht, unterteilt ist, so dass der Kolben (31, 31', 41) durch den Überdruck in der zweiten Kammer (35, 35', 45) zur ersten Kammer (34, 34', 44) hin gedrückt und das Schliessorgan (3, 3', 4) in seine Schliessstellung bewegt wird, sobald das Verriegelungsorgan (2) die zweite Kolbenstange (32, 32', 42) freigibt.
- Explosionsschutzvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Schliessorgan (3) über eine Kolbenstange (30") und einen Kolben (31"), die zumindest teilweise innerhalb eines dazugehörigen, ortsfesten Zylinders (33") bewegbar angeordnet sind, von der sich im Grundzustand befindenden Auslöseeinrichtung (1") in seiner offenen Stellung gehalten wird, wobei das Innere des Zylinders (33") durch den Kolben (31") in eine erste Kammer (34"), der die Kolbenstange (30") zugeordnet ist und die unter einem relativ niederen Druck (p1) steht, und eine zweite Kammer (35"), in der die Auslöseeinrichtung (1") angeordnet ist und die unter einem im Vergleich zur ersten Kammer (34") grösseren Druck (p2) steht, unterteilt ist, so dass der Kolben (31") durch den Überdruck in der zweiten Kammer (35") zur ersten Kammer (34") hin gedrückt und das Schliessorgan (3) in seine Schliessstellung bewegt wird, sobald die Auslöseeinrichtung (1") den Kolben (31") freigibt.
- Explosionsschutzvorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die zweite Kammer (35, 35', 35", 45) mit einem Druckgasspeicher (36) in Verbindung steht, der während des Bewegens des Schliessorgans (3, 3', 4) in die Schliessstellung für einen genügenden Überdruck der zweiten Kammer (35, 35', 35", 45) im Vergleich zur ersten Kammer (34, 34', 34", 44) sorgt.
- Explosionsschutzvorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Schliessorgan (3, 3', 4) Teil eines Axialventils oder ein Schieber ist.
- Explosionsschutzvorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass sie zwei Schliessorgane (3, 3') umfasst, die sich nach Betätigung der Auslöseeinrichtung (1) in entgegengesetzten Richtungen in die jeweiligen Schliessstellungen bewegen.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002212783A CA2212783A1 (en) | 1996-08-13 | 1997-08-12 | Explosion protection apparatus with electrical initiations |
US08/909,840 US5959193A (en) | 1996-08-13 | 1997-08-12 | Explosion protection apparatus with electrical initiation |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1992/96 | 1996-08-13 | ||
CH199296 | 1996-08-13 | ||
CH199296 | 1996-08-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0824027A1 EP0824027A1 (de) | 1998-02-18 |
EP0824027B1 true EP0824027B1 (de) | 2003-04-02 |
Family
ID=4223382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97810343A Expired - Lifetime EP0824027B1 (de) | 1996-08-13 | 1997-06-04 | Explosionsschutzvorrichtung mit elektrischer Auslösung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0824027B1 (de) |
AT (1) | ATE235933T1 (de) |
DE (1) | DE59709670D1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH692806A5 (de) * | 1998-03-17 | 2002-11-15 | Rubitec Ag | Ventil für eine Explosionsschutzvorrichtung. |
EP2489411A1 (de) | 2011-02-17 | 2012-08-22 | Minimax GmbH & Co KG | Energieunabhängige Auslöseeinrichtung für eine gesteuerte Löscheinrichtung |
AT520540B1 (de) * | 2017-11-14 | 2019-05-15 | Hoerbiger Kompressortech Hold | Elektromagnetische Auslösung |
CN112344073B (zh) * | 2020-11-09 | 2022-05-10 | 浙江天齐通风设备有限公司 | 一种防火强密性的防火阀 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4237179A1 (de) * | 1992-11-04 | 1994-05-05 | Geze Gmbh & Co | Türschließer |
FR2704152A1 (fr) * | 1993-04-23 | 1994-10-28 | Sepame | Clapet de protection incendie à fermeture autonome déclenchée automatiquement ou par commande à distance. |
WO1994026352A1 (en) * | 1993-05-12 | 1994-11-24 | Nv Brandstopp Ab | Fire damper and a fire damper control system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1868708A (en) * | 1930-03-27 | 1932-07-26 | C M Kemp Mfg Company | Automatic fire safety device |
CH440894A (de) * | 1965-07-23 | 1967-07-31 | Ossian Ericson Karl Harald | Ventil für Lüftungskanäle |
FR2234501A1 (en) * | 1973-06-22 | 1975-01-17 | Electromecanique Ind Soc Gen | Fire safety closure for ventilation duct - has spring loaded plug held open by fusible ring on plug mounting shaft |
CH685134A5 (de) * | 1992-05-14 | 1995-03-31 | Niro Aeromatic Ag | Flammensperrende Explosionsschutzvorrichtung. |
DE4316584C1 (de) * | 1993-05-18 | 1994-09-08 | Knebel Heinz Hermann | Armatur zum Absperren von mit Hausanschlüssen verbundenen und mit Gasen beaufschlagten Versorgungsleitungen sowie Einrichtung zum Steuern der Armatur |
-
1997
- 1997-06-04 AT AT97810343T patent/ATE235933T1/de not_active IP Right Cessation
- 1997-06-04 EP EP97810343A patent/EP0824027B1/de not_active Expired - Lifetime
- 1997-06-04 DE DE59709670T patent/DE59709670D1/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4237179A1 (de) * | 1992-11-04 | 1994-05-05 | Geze Gmbh & Co | Türschließer |
FR2704152A1 (fr) * | 1993-04-23 | 1994-10-28 | Sepame | Clapet de protection incendie à fermeture autonome déclenchée automatiquement ou par commande à distance. |
WO1994026352A1 (en) * | 1993-05-12 | 1994-11-24 | Nv Brandstopp Ab | Fire damper and a fire damper control system |
Also Published As
Publication number | Publication date |
---|---|
ATE235933T1 (de) | 2003-04-15 |
EP0824027A1 (de) | 1998-02-18 |
DE59709670D1 (de) | 2003-05-08 |
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