EP1962017A2 - Device for avoiding exhaust gas return flow in a boiler - Google Patents
Device for avoiding exhaust gas return flow in a boiler Download PDFInfo
- Publication number
- EP1962017A2 EP1962017A2 EP08000896A EP08000896A EP1962017A2 EP 1962017 A2 EP1962017 A2 EP 1962017A2 EP 08000896 A EP08000896 A EP 08000896A EP 08000896 A EP08000896 A EP 08000896A EP 1962017 A2 EP1962017 A2 EP 1962017A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- flap part
- holder
- flap
- supply air
- air line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000007789 sealing Methods 0.000 claims description 27
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- 238000011144 upstream manufacturing Methods 0.000 claims description 4
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L11/00—Arrangements of valves or dampers after the fire
- F23L11/005—Arrangements of valves or dampers after the fire for closing the flue during interruption of burner function
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L13/00—Construction of valves or dampers for controlling air supply or draught
- F23L13/02—Construction of valves or dampers for controlling air supply or draught pivoted about a single axis but having not other movement
Definitions
- the invention relates to a device for preventing an exhaust gas recirculation in a boiler in the overpressure operation, wherein a plurality of boilers have a common exhaust pipe, and a supply air line of each boiler has a cross-section closing obturator.
- the device has a sealing element arranged diagonally in the flow channel, which is designed as an elastic membrane and is intended to effect a sealing function with a sealing surface of the device constricting the flow cross section of the fresh air supply line.
- the invention has for its object to provide a device which ensures a permanent sealing function and is simple and thus inexpensive to produce.
- a device for preventing an exhaust gas recirculation in a boiler in the overpressure operation wherein a plurality of boilers are connected to a common exhaust pipe, and a supply air line of each boiler has a cross-section closing obturator is provided according to the invention that the locking member is designed as a check valve ,
- the non-return valve has at least one flap part which is pivotably articulated to a frame-like support, wherein the holder is designed as insertable into the supply air line is.
- the flap member may have a rectangular orientation to the flow direction in its closed position and is connected via a pivot bearing with the holder, which for the purpose of smooth running has a radial clearance to allow an advantageous free pivoting movement of the flap part.
- the installation position of the frame-like holder can be aligned both horizontally and vertically.
- the flap level of the flap part can be aligned in its closed position at an angle of 40 ° to 70 ° to the longitudinal axis of the holder inserted in the supply air line.
- the oblique orientation of the flap plane of the flap member to the longitudinal axis of the frame-like holder ensures that, especially in a horizontally extending supply air line, always a cross-sectional area of the supply air line by the flap portion obstructing closed position is given. Due to the oblique orientation of the flap plane, the dead weight of the flap part generates a force acting between the contact surfaces of the holder and the flap part contact pressure, with the help of operating shutdown at the same time an advantageous sealing of the contact surfaces is effected together.
- the angle between the flap plane of the flap part and extending in the central center of the holder central longitudinal axis of the holder is preferably about 65 °.
- the flap part is equipped with closing weights.
- closing weights allows advantageously simple way to increase the dead weight of the flap part, so that the return movement of the flap part is done safely in its closed position after switching off the fan burner.
- the number or size of the closing weights used can vary with regard to the necessary closing force and the associated operating behavior of a designed as a check valve device for flow control.
- the closing weights are preferably arranged outside the center of gravity of the flap part, in particular in a region approximated to the pivot bearing, in such a way that an optimum sealing effect is always ensured in the region of the play-bearing pivot bearing.
- the flap part and the flap part associated with the holder have abuttable sealing surfaces.
- the sealing surfaces cause a seal between the contact surfaces of the flap part and the holder is improved; because the trained as sealing surfaces contact surfaces ensure optimum sealing effect when the flap part of the device according to the invention is in the closed position.
- the surface of the flap part and the holder can be processed in the region of their sealing surfaces, for example by means of a cutting process, so that each of the sealing surfaces receives a corresponding surface quality for optimum sealing function.
- the material for the sealing surface of the holder is a soft elastic material.
- the use of a soft elastic material to form a sealing surface of the holder has the advantage that it, due to its elastic properties, certain manufacturing tolerances can compensate, whereby an optimal seal between the flap part and holder is guaranteed.
- the soft elastic material can be in an advantageously simple manner to appropriate contours surfaces having, for example, spray.
- a flexible material for example, a polyurethane elastomer can be used.
- the frame-like support is advantageously an annular body, whose in the supply air line projecting, upstream surfaces have a streamlined shape. Due to the flow-favorable shaping of the supply air line projecting, upstream surfaces of the holder, the flow or pressure losses occurring in the supply air line are kept as low as possible. It is of course also possible to provide instead of a circular ring body a square configuration of the holder, which can then be integrated into, for example, a rectangular Zu Kunststoff- or suction of the respective boiler.
- the device according to the invention has a tumbler for the flap part.
- the tumbler advantageously ensures that the flap portion, after the negative pressure and thus the flow in the supply air line generating fan burner of the boiler has been switched off, is held in its closed position and completely closes the preferably circular opening of the frame-like support.
- the tumbler can be done for example by means of a spring element which engages with a predetermined spring force on the flap part and causes a corresponding contact pressure between the flap part and the holder.
- movably guided closing weights such as a ball, on the flap part of the device for forming a tumbler. The movable closing weights cause a shift of the center of gravity of the flap part during the opening movement in the direction of its pivot bearing.
- the tumbler is designed as a magnetic closure, which has at least one permanent magnet, which is associated with a arranged on the flap part counterpart.
- the design of the tumbler as a magnetic closure provides a structurally simple way to implement a tumbler. Unlike a spring acting on the flap part spring element, a magnetic closure with advantage directly in, or near the closed position of the flap part exerts its greatest holding power. However, as soon as the holding force between the permanent magnet and the counterpart arranged on the flap part is overcome at the beginning of an opening movement of the flap part, the flap part can move freely.
- the permanent magnet used can be with the help of the permanent magnet used and preferably formed as a metal part counterpart on the flap part, wherein the permanent magnet can also be arranged on the flap part and the counterpart on the frame-like support, ensure a reliable long-term function of the tumbler. It is of course also possible to use other, a holding force generating functional parts in place of the permanent magnet.
- the holder has a receptacle, and the receptacle comprises at least one guide for the permanent magnet.
- a receptacle for example, designed as a receptacle, which also serves as a guide for the permanent magnet
- the permanent magnet can advantageously be easily along the particular guide surfaces having inner lateral surface of the socket move.
- a displacement of the permanent magnet in the receptacle causes a change in distance and thus a corresponding enlargement or reduction of the force acting on the counterpart, and thus the flap part, magnetic holding force.
- the individual Adjustability of the holding force is particularly advantageous when the device according to the invention is to show a matched to the corresponding performance characteristics of a respective associated fan burner operating behavior.
- the receptacle is preferably arranged parallel to the longitudinal axis of the supply air line in the annular body of the holder.
- the material for the flap part is in particular plastic, wherein the application is preferably a polyethylene.
- the material used has advantageous properties in terms of its low density and the associated low dead weight, so that can be folded out of the flow cross-section of the supply air line safely by means of the inlet air flowing through the supply air supply line made of plastic flap part.
- the material for the holder is a plastic.
- the plastic has the advantage that it can be processed by means of advantageous manufacturing processes, such as injection molding. Of course, other pourable materials can be used, especially zinc and aluminum.
- the supply air line has at least one piece of pipe, in which the check valve is received, wherein the pipe wall of the pipe piece has outwardly directed bulges for the pivotable flap part. Ensuring the formation of outward bulges in the pipe wall of the pipe section ensures that the flap part of the check valve can perform its folding movements without hindrance.
- the flap part can be folded by these bulges preferably in a position approximated to the pipe wall.
- the holder has at least one positioning aid for a predetermined installation position in the supply air line. With the help of the positioning a corresponding orientation of the device during installation in a piece of pipe of the supply air line. This ensures that the flap part is after installation in the correct functionally correct angle to the inflow of supply air.
- the positioning can be designed in particular as located on the outer contour of the holder, protruding positive-locking parts, which engage in associated, embedded in the wall of the supply air intake recordings.
- Fig. 1 shows a check valve 1, which is arranged in particular in a pipe section 2 of a supply air line.
- the non-return flap 1 has a frame-like holder 3 designed here as an annular body, on which a flap part 4 is articulated in a hinged manner.
- the flap part is in its closed position transverse to the flow direction of the supply air line arranged.
- An arrangement at a predetermined angle to its longitudinal axis is also readily possible.
- the flap part 4 is articulated on one side at one point of its circumference via a pivot bearing 5, so that the flap part 4 is freely hinged movable in the flow direction of the supply air.
- the flap part 4 If the supply of supply air is stopped, then the flap part 4 returns to its closed position and prevents backflow of exhaust gases against the flow direction of the supply air.
- the check valve 1 is further equipped with a designed as a magnetic closure tumbler 8 for the flap part 4, which exerts a predetermined holding force on the flap part 4.
- the tumbler 8 has a permanent magnet 9, which is associated with a arranged on the flap part 4 counterpart 10.
- the permanent magnet 9 and the counterpart 10 are in particular in the closed position of the flap part 4 together in a holding operative connection.
- Fig. 2 shows in particular a sectional view of the check valve 1 and the check valve 1 receiving pipe section 2 of the supply air line.
- upstream surfaces 11 of the holder 3 have a streamlined shape.
- the tube piece has outwardly directed bulges 12, 13 (FIG. Fig. 1 ) for the pivotable flap part 4.
- the bulges 12, 13 increase the opening angle of the flap part and limit it at the same time in a predetermined manner, so that the flap part coincides when switching off the fan burner (flow arrest) by gravity again. Opening the flap part 4 guaranteed.
- the flap part 4 is additionally provided with closing weights 14, which at break the supply air supply ensure optimum sealing of the flap part 4 in the region of preferably a game-bearing pivot bearing 5.
- the holder 3 has a receptacle 15 in the form of a plug-in socket, in which the permanent magnet 9 is held in a sliding manner.
- About the recording 15 can be a stepless change of the force acting between the permanent magnet 9 and the counterpart 10 holding force make, whereby an optimal adjustability of the tumbler 8 is given with respect to a predetermined performance of the check valve 1.
- FIG. 3 another embodiment of a check valve 20 is shown.
- the flap plane of the flap member 21 is aligned in the closed position at a predetermined angle to the longitudinal axis of the flap member receiving bracket 22.
- Both the flap part 21 and the holder 22 have sealing surfaces 23, 24 which can be brought into abutment with each other, wherein in particular the sealing surface 23 of the holder consists of a soft-elastic material.
- the check valve 20 is also provided with a designed as a magnetic lock tumbler 25 for the flap part.
- the tumbler having a permanent magnet 26 is associated with a metallic counterpart 27, which is arranged on the flap part 21.
- the check valve 20 is equipped with a positioning aid 29, which always ensures a defined mounting position of the check valve in the supply air line of a boiler.
- the positioning aid 29 is a notch, which is introduced into a circumferential projection of the holder designed as a ring body. In the notch may engage a fitting part formed correspondingly on the supply air line.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Lift Valve (AREA)
- Incineration Of Waste (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Vermeidung einer Abgasrückströmung bei einem Heizkessel im Überdruckbetrieb, wobei mehrere Heizkessel eine gemeinsame Abgasleitung aufweisen, und eine Zuluft-Leitung jedes Heizkessels ein ihren Querschnitt verschließendes Sperrorgan aufweist.The invention relates to a device for preventing an exhaust gas recirculation in a boiler in the overpressure operation, wherein a plurality of boilers have a common exhaust pipe, and a supply air line of each boiler has a cross-section closing obturator.
Nach der
Bei derartigen Vorrichtungen können zum Beispiel wechselnde Temperaturen bzw. die natürliche Alterung des Materials, eine Verformung oder Versprödung der elastischen Membran verursachen. Im Bedarfsfall könnte dann eine sichere Anlage des Dichtelementes an der Dichtfläche nicht mehr gegeben sein und ein unerwünschtes Einströmen von Abgasen in den Aufstellraum des Heizkessels erfolgen, wenn der Betrieb eines oder mehrerer der an eine gemeinsame Abgasleitung angeschlossenen Heizkessels unterbrochen ist.In such devices, for example, changing temperatures or natural aging of the material may cause deformation or embrittlement of the elastic membrane. If necessary, then a safe investment of the sealing element on the sealing surface would no longer be given and an undesirable influx of exhaust gases into the boiler room, if the operation of one or more of the connected to a common exhaust pipe boiler is interrupted.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zu schaffen, welche eine dauerhaft abdichtende Funktion sicherstellt und einfach und somit kostengünstig herstellbar ist.The invention has for its object to provide a device which ensures a permanent sealing function and is simple and thus inexpensive to produce.
Die Lösung der Aufgabe erfolgt erfindungsgemäß durch eine Vorrichtung mit den Merkmalen des Schutzanspruches 1. Vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung sind in den Ansprüchen 2 bis 14 angegeben.The object is achieved by a device having the features of
Bei einer Vorrichtung zur Vermeidung einer Abgasrückströmung bei einem Heizkessel im Überdruckbetrieb, wobei mehrere Heizkessel an eine gemeinsame Abgasleitung angeschlossen sind, und eine Zuluft-Leitung jedes Heizkessels ein ihren Querschnitt verschließendes Sperrorgan aufweist, ist nach der Erfindung vorgesehen, daß das Sperrorgan als Rückschlagklappe ausgebildet ist.In a device for preventing an exhaust gas recirculation in a boiler in the overpressure operation, wherein a plurality of boilers are connected to a common exhaust pipe, and a supply air line of each boiler has a cross-section closing obturator is provided according to the invention that the locking member is designed as a check valve ,
Mit der Ausbildung des Sperrorganes als in der Zuluft-Leitung sitzende Rückschlagklappe, ist eine vorteilhaft einfache und zugleich betriebssichere Abdichtfunktion der Vorrichtung zur Vermeidung von Abgasrückströmungen für einen mit einem Gebläsebrenner ausgerüsteten Heizkessel gegeben. Eine Rückschlagklappe ist unkompliziert, also konstruktiv einfach und als steife Klappe relativ formstabil. Auf die Rückschlagklappe einwirkende Temperaturwechsel bzw. Versprödungen des verwendeten Materials werden kaum Einfluß auf deren Form nehmen und es tritt somit keine Beeinträchtigung der abdichtenden Funktion ein. Die erfindungsgemäße Rückschlagklappe wirkt besonders betriebssicher.With the formation of the obturator as sitting in the supply line check valve, an advantageous simple and at the same time reliable sealing function of the device to prevent exhaust gas recirculation is given for a equipped with a blower burner boiler. A non-return valve is straightforward, so structurally simple and relatively stiff as a stiff flap. On the check valve acting temperature change or embrittlement of the material used will hardly affect their shape and thus there is no impairment of the sealing function. The non-return valve according to the invention is particularly reliable.
Nach einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, daß die Rückschlagklappe wenigstens ein Klappenteil aufweist, welches schwenkbeweglich an einer rahmenartigen Halterung angelenkt ist, wobei die Halterung als in die Zuluft-Leitung einbaubarer Einsatz ausgebildet ist. Durch die Verwendung einer rahmenartigen Halterung in Verbindung mit dem daran angelenkten Klappenteil ist es möglich, eine erfindungsgemäße Vorrichtung auszubilden, die, aufgrund ihrer konstruktiv einfachen Ausgestaltung, in die Zuluft-Leitungen einer Vielzahl unterschiedlichster Gebläsebrenner auf vorteilhafte Weise integriert werden können. Da die Halterung als einbaubarer Einsatz ausgebildet ist, lassen sich bereits in Betrieb befindliche Heizkessel mit derartig erfindungsgemäß ausgebildeten Vorrichtungen problemlos nachrüsten. Das Klappenteil kann in seiner Schließstellung eine rechtwinklige Ausrichtung zur Strömungsrichtung aufweisen und ist über ein Drehlager mit der Halterung verbunden, welches zwecks Leichtgängigkeit ein radiales Spiel aufweist, um eine vorteilhaft freie Schwenkbewegung des Klappenteiles zu ermöglichen. Die Einbaulage der rahmenartigen Halterung kann sowohl horizontal als auch vertikal ausgerichtet sein.According to an advantageous embodiment of the invention, it is provided that the non-return valve has at least one flap part which is pivotably articulated to a frame-like support, wherein the holder is designed as insertable into the supply air line is. By using a frame-like holder in conjunction with the hinged thereto flap part, it is possible to form a device according to the invention, which, due to their simple design, in the supply air lines a variety of different blower burners can be integrated in an advantageous manner. Since the holder is designed as a built-in insert, already in operation boilers can be easily retrofitted with such inventively designed devices. The flap member may have a rectangular orientation to the flow direction in its closed position and is connected via a pivot bearing with the holder, which for the purpose of smooth running has a radial clearance to allow an advantageous free pivoting movement of the flap part. The installation position of the frame-like holder can be aligned both horizontally and vertically.
Die Klappenebene des Klappenteiles kann in seiner Schließstellung in einem Winkel von 40° bis 70° zur Längsachse der in die Zuluft-Leitung eingesetzten Halterung ausgerichtet sein. Die schräge Ausrichtung der Klappenebene des Klappenteiles zur Längsachse der rahmenartigen Halterung stellt sicher, daß, insbesondere bei einer horizontal verlaufenden Zuluft-Leitung, stets eine die Querschnittsfläche der Zuluft-Leitung mittels des Klappenteils versperrende Schließstellung gegeben ist. Durch die schräge Ausrichtung der Klappenebene erzeugt das Eigengewicht des Klappenteiles eine zwischen den Anlageflächen der Halterung und des Klappenteiles wirkende Anpreßkraft, mit deren Hilfe bei Betriebsabschaltung gleichzeitig eine vorteilhafte Abdichtung der Anlageflächen aneinander bewirkt wird. Der Winkel zwischen der Klappenebene des Klappenteiles und der im mittigen Zentrum der Halterung verlaufenden Mittellängsachse der Halterung beträgt vorzugsweise etwa 65°.The flap level of the flap part can be aligned in its closed position at an angle of 40 ° to 70 ° to the longitudinal axis of the holder inserted in the supply air line. The oblique orientation of the flap plane of the flap member to the longitudinal axis of the frame-like holder ensures that, especially in a horizontally extending supply air line, always a cross-sectional area of the supply air line by the flap portion obstructing closed position is given. Due to the oblique orientation of the flap plane, the dead weight of the flap part generates a force acting between the contact surfaces of the holder and the flap part contact pressure, with the help of operating shutdown at the same time an advantageous sealing of the contact surfaces is effected together. The angle between the flap plane of the flap part and extending in the central center of the holder central longitudinal axis of the holder is preferably about 65 °.
Nach einer anderen Weiterbildung der Erfindung ist vorgesehen, daß das Klappenteil mit Schließgewichten ausgerüstet ist. Der Einsatz von Schließgewichten ermöglicht auf vorteilhaft einfache Weise eine Erhöhung des Eigengewichts des Klappenteiles, so daß die Rückbewegung des Klappenteiles in seine Schließstellung nach dem Abschalten des Gebläsebrenners sicher erfolgt. Die Anzahl bzw. die Größe der eingesetzten Schließgewichte kann hinsichtlich der notwendigen Schließkraft und dem damit verbundenen Betriebsverhalten einer als Rückschlagklappe ausgebildeten Vorrichtung zur Strömungssicherung variieren. Die Schließgewichte sind vorzugsweise außerhalb des Schwerpunktes des Klappenteiles angeordnet, insbesondere in einem an das Drehlager angenäherten Bereich, derart, daß stets eine optimale Dichtwirkung im Bereich des spielbehafteten Drehlagers gewährleistet ist.According to another embodiment of the invention it is provided that the flap part is equipped with closing weights. The use of closing weights allows advantageously simple way to increase the dead weight of the flap part, so that the return movement of the flap part is done safely in its closed position after switching off the fan burner. The number or size of the closing weights used can vary with regard to the necessary closing force and the associated operating behavior of a designed as a check valve device for flow control. The closing weights are preferably arranged outside the center of gravity of the flap part, in particular in a region approximated to the pivot bearing, in such a way that an optimum sealing effect is always ensured in the region of the play-bearing pivot bearing.
Das Klappenteil und die dem Klappenteil zugeordnete Halterung weisen miteinander in Anlage bringbare Dichtflächen auf. Die Dichtflächen bewirken, daß eine Abdichtung zwischen den Anlageflächen des Klappenteiles und der Halterung verbessert ist; denn die als Dichtflächen ausgebildeten Anlageflächen gewährleisten eine optimale Dichtwirkung, wenn sich das Klappenteil der erfindungsgemäßen Vorrichtung in der Schließstellung befindet. Die Oberfläche des Klappenteiles und der Halterung können im Bereich ihrer Dichtflächen beispielsweise mittels eines spanenden Verfahrens bearbeitet sein, so daß jede der Dichtflächen eine entsprechende Oberflächengüte für eine optimale Abdichtfunktion erhält.The flap part and the flap part associated with the holder have abuttable sealing surfaces. The sealing surfaces cause a seal between the contact surfaces of the flap part and the holder is improved; because the trained as sealing surfaces contact surfaces ensure optimum sealing effect when the flap part of the device according to the invention is in the closed position. The surface of the flap part and the holder can be processed in the region of their sealing surfaces, for example by means of a cutting process, so that each of the sealing surfaces receives a corresponding surface quality for optimum sealing function.
Nach einer Weiterbildung der Erfindung ist vorgesehen, daß der Werkstoff für die Dichtfläche der Halterung ein weichelastischer Werkstoff ist. Der Einsatz eines weichelastischen Werkstoffes zur Ausbildung einer Dichtfläche der Halterung hat den Vorteil, daß er, aufgrund seiner elastischen Eigenschaften, bestimmte Fertigungstoleranzen ausgleichen kann, wodurch eine optimale Abdichtung zwischen Klappenteil und Halterung gewährleistet ist. Des weiteren läßt sich der weichelastische Werkstoff auf vorteilhaft einfache Weise an entsprechende Konturen aufweisende Oberflächen anformen, zum Beispiel anspritzen. Als weichelastischer Werkstoff kann zum Beispiel ein Polyurethanelastomer eingesetzt werden.According to a development of the invention, it is provided that the material for the sealing surface of the holder is a soft elastic material. The use of a soft elastic material to form a sealing surface of the holder has the advantage that it, due to its elastic properties, certain manufacturing tolerances can compensate, whereby an optimal seal between the flap part and holder is guaranteed. Furthermore, the soft elastic material can be in an advantageously simple manner to appropriate contours surfaces having, for example, spray. As a flexible material, for example, a polyurethane elastomer can be used.
Die rahmenartige Halterung ist mit Vorteil ein Ringkörper, dessen in die Zuluft-Leitung vorstehenden, anströmseitigen Flächen eine strömungsgünstige Formgebung aufweisen. Durch die strömungsgünstige Formgebung der in die Zuluft-Leitung vorstehenden, anströmseitigen Flächen der Halterung werden die in der Zuluft-Leitung auftretenden Strömungs- bzw. Druckverluste so gering wie möglich gehalten. Es ist selbstverständlich auch möglich, anstelle eines kreisförmigen Ringkörpers eine eckige Ausbildung der Halterung vorzusehen, welche sich dann in beispielsweise eine rechteckige Zuluft- bzw. Ansaugleitung des jeweiligen Heizkessels integrieren läßt.The frame-like support is advantageously an annular body, whose in the supply air line projecting, upstream surfaces have a streamlined shape. Due to the flow-favorable shaping of the supply air line projecting, upstream surfaces of the holder, the flow or pressure losses occurring in the supply air line are kept as low as possible. It is of course also possible to provide instead of a circular ring body a square configuration of the holder, which can then be integrated into, for example, a rectangular Zuluft- or suction of the respective boiler.
Damit stets eine dichtende Anlage des Klappenteiles mit der Halterung gegeben ist, weist die erfindungsgemäße Vorrichtung eine Zuhaltung für das Klappenteil auf. Die Zuhaltung stellt auf vorteilhafte Weise sicher, daß das Klappenteil, nachdem der einen Unterdruck und somit die Strömung in der Zuluft-Leitung erzeugende Gebläsebrenner des Heizkessels abgeschaltet wurde, in seiner Schließstellung gehalten wird und die vorzugsweise kreisrunde Öffnung der rahmenartigen Halterung vollständig verschließt. Die Zuhaltung kann beispielsweise mit Hilfe eines Federelementes erfolgen, welches mit einer vorbestimmten Federkraft am Klappenteil angreift und eine entsprechende Anpreßkraft zwischen Klappenteil und Halterung bewirkt. Es ist ebenfalls denkbar, beweglich geführte Schließgewichte, wie z.B. eine Kugel, am Klappenteil der Vorrichtung zur Ausbildung einer Zuhaltung zu verwenden. Die beweglichen Schließgewichte bewirken eine Verlagerung des Schwerpunktes des Klappenteiles während der Öffnungsbewegung in Richtung seines Drehlagers.So that a sealing contact of the flap part is always given with the holder, the device according to the invention has a tumbler for the flap part. The tumbler advantageously ensures that the flap portion, after the negative pressure and thus the flow in the supply air line generating fan burner of the boiler has been switched off, is held in its closed position and completely closes the preferably circular opening of the frame-like support. The tumbler can be done for example by means of a spring element which engages with a predetermined spring force on the flap part and causes a corresponding contact pressure between the flap part and the holder. It is also conceivable to use movably guided closing weights, such as a ball, on the flap part of the device for forming a tumbler. The movable closing weights cause a shift of the center of gravity of the flap part during the opening movement in the direction of its pivot bearing.
Mit besonderem Vorteil ist die Zuhaltung als Magnetverschluß ausgebildet, der wenigstens einen Permanentmagneten aufweist, dem ein am Klappenteil angeordnetes Gegenstück zugeordnet ist. Die Ausbildung der Zuhaltung als Magnetverschluß stellt eine konstruktiv einfache Möglichkeit zur Umsetzung einer Zuhaltung dar. Anders als ein am Klappenteil angreifendes Federelement, übt ein Magnetverschluß mit Vorteil unmittelbar in, bzw. nahe der Schließstellung des Klappenteiles seine größte Haltekraft aus. Sobald jedoch die Haltekraft zwischen Permanentmagnet und dem am Klappenteil angeordneten Gegenstück zu Beginn einer Öffnungsbewegung des Klappenteiles überwunden ist, läßt sich das Klappenteil frei bewegen. Des weiteren läßt sich mit Hilfe des eingesetzten Permanentmagneten und dem vorzugsweise als Metallteil ausgebildeten Gegenstück am Klappenteil, wobei der Permanentmagnet auch am Klappenteil und das Gegenstück an der rahmenartigen Halterung angeordnet sein kann, eine betriebssichere Langzeitfunktion der Zuhaltung gewährleisten. Es ist selbstverständlich auch möglich, an Stelle des Permanentmagneten andere, eine Haltekraft erzeugende Funktionsteile einzusetzen.With particular advantage, the tumbler is designed as a magnetic closure, which has at least one permanent magnet, which is associated with a arranged on the flap part counterpart. The design of the tumbler as a magnetic closure provides a structurally simple way to implement a tumbler. Unlike a spring acting on the flap part spring element, a magnetic closure with advantage directly in, or near the closed position of the flap part exerts its greatest holding power. However, as soon as the holding force between the permanent magnet and the counterpart arranged on the flap part is overcome at the beginning of an opening movement of the flap part, the flap part can move freely. Furthermore, can be with the help of the permanent magnet used and preferably formed as a metal part counterpart on the flap part, wherein the permanent magnet can also be arranged on the flap part and the counterpart on the frame-like support, ensure a reliable long-term function of the tumbler. It is of course also possible to use other, a holding force generating functional parts in place of the permanent magnet.
Die Halterung weist eine Aufnahme auf, und die Aufnahme umfaßt mindestens eine Führung für den Permanentmagneten. Mittels einer beispielsweise als Steckbuchse ausgebildeten Aufnahme, welche gleichzeitig als Führung für den Permanentmagneten dient, läßt sich der Permanentmagnet vorteilhaft einfach längs der insbesondere Führungsflächen aufweisenden inneren Mantelfläche der Steckbuchse verschieben. Eine Verschiebung des Permanentmagneten in der Aufnahme bewirkt eine Abstandsveränderung und somit eine entsprechende Vergrößerung bzw. Verkleinerung der auf das Gegenstück, und somit auch das Klappenteil, einwirkenden magnetischen Haltekraft. Die individuelle Einstellbarkeit der Haltekraft ist insbesondere dann von Vorteil, wenn die erfindungsgemäße Vorrichtung ein auf die entsprechende Leistungscharakteristik eines jeweils zugeordneten Gebläsebrenners abgestimmtes Betriebsverhalten zeigen soll. Die Aufnahme ist vorzugsweise parallel zur Längsachse der Zuluft-Leitung im Ringkörper der Halterung angeordnet.The holder has a receptacle, and the receptacle comprises at least one guide for the permanent magnet. By means of a receptacle, for example, designed as a receptacle, which also serves as a guide for the permanent magnet, the permanent magnet can advantageously be easily along the particular guide surfaces having inner lateral surface of the socket move. A displacement of the permanent magnet in the receptacle causes a change in distance and thus a corresponding enlargement or reduction of the force acting on the counterpart, and thus the flap part, magnetic holding force. The individual Adjustability of the holding force is particularly advantageous when the device according to the invention is to show a matched to the corresponding performance characteristics of a respective associated fan burner operating behavior. The receptacle is preferably arranged parallel to the longitudinal axis of the supply air line in the annular body of the holder.
Der Werkstoff für das Klappenteil ist insbesondere Kunststoff, wobei zur Anwendung bevorzugt ein Polyethylen kommt. Der eingesetzte Werkstoff weist vorteilhafte Eigenschaften hinsichtlich seiner geringen Dichte und des damit verbundenen niedrigen Eigengewichts auf, so daß sich mittels der durch die Zuluft-Leitung einströmenden Zuluft das aus Kunststoff ausgebildete Klappenteil aus dem Strömungsquerschnitt der Zuluft-Leitung sicher herausklappen läßt.The material for the flap part is in particular plastic, wherein the application is preferably a polyethylene. The material used has advantageous properties in terms of its low density and the associated low dead weight, so that can be folded out of the flow cross-section of the supply air line safely by means of the inlet air flowing through the supply air supply line made of plastic flap part.
Ebenso wie das Klappenteil, ist auch der Werkstoff für die Halterung ein Kunststoff. Der Kunststoff hat den Vorzug, daß er mit Hilfe vorteilhafter Fertigungsverfahren, wie zum Beispiel dem Spritzgießen, verarbeitet werden kann. Selbstverständlich können auch andere vergießbare Werkstoffe verwendet werden, insbesondere Zink und Aluminium.Like the flap part, the material for the holder is a plastic. The plastic has the advantage that it can be processed by means of advantageous manufacturing processes, such as injection molding. Of course, other pourable materials can be used, especially zinc and aluminum.
Die Zuluft-Leitung weist zumindest ein Rohrstück auf, in dem die Rückschlagklappe aufgenommen ist, wobei die Rohrwandung des Rohrstückes nach außen gerichtete Auswölbungen für das schwenkbewegliche Klappenteil aufweist. Die Ausbildung von nach außen gerichteten Auswölbungen in der Rohrwandung des Rohrstücks gewährleistet, daß das Klappenteil der Rückschlagklappe seine Klappbewegungen ohne Behinderungen ausführen kann. Das Klappenteil läßt sich durch diese Auswölbungen vorzugsweise in eine an die Rohrwandung angenäherte Stellung klappen.The supply air line has at least one piece of pipe, in which the check valve is received, wherein the pipe wall of the pipe piece has outwardly directed bulges for the pivotable flap part. Ensuring the formation of outward bulges in the pipe wall of the pipe section ensures that the flap part of the check valve can perform its folding movements without hindrance. The flap part can be folded by these bulges preferably in a position approximated to the pipe wall.
Die Halterung weist mindestens eine Positionierhilfe für eine vorbestimmte Einbaulage in der Zuluft-Leitung auf. Mit Hilfe der Positionierhilfen erfolgt eine entsprechende Ausrichtung der Vorrichtung während des Einbauens in ein Rohrstück der Zuluft-Leitung. Damit ist sichergestellt, daß das Klappenteil nach dem Einbau im richtigen funktionsgerechten Winkel zur Zuströmung der Zuluft steht. Die Positionierhilfen können insbesondere als an der äußeren Kontur der Halterung befindliche, vorstehende Formschlußteile ausgebildet sein, welche in zugeordnete, in die Wandung der Zuluft-Leitung eingelassene Aufnahmen eingreifen.The holder has at least one positioning aid for a predetermined installation position in the supply air line. With the help of the positioning a corresponding orientation of the device during installation in a piece of pipe of the supply air line. This ensures that the flap part is after installation in the correct functionally correct angle to the inflow of supply air. The positioning can be designed in particular as located on the outer contour of the holder, protruding positive-locking parts, which engage in associated, embedded in the wall of the supply air intake recordings.
Ausführungsbeispiele der Erfindung, aus denen sich weitere erfinderische Merkmale ergeben, sind in der Zeichnung dargestellt. Es zeigen:
- Fig. 1:
- eine perspektivische Ansicht eines ersten Ausführungsbeispiels einer Rückschlagklappe in einem Rohrstück einer Zuluft-Leitung in senkrechter Einbaulage;
- Fig. 2:
- eine Ansicht der Rückschlagklappe nach
Fig. 1 im Schnitt, und - Fig. 3:
- eine perspektivische Ansicht eines zweiten Ausführungsbeispiels einer Rückschlagklappe in waagerechter Einbaulage.
- Fig. 1:
- a perspective view of a first embodiment of a check valve in a pipe section of a supply air line in a vertical mounting position;
- Fig. 2:
- a view of the check valve after
Fig. 1 on average, and - 3:
- a perspective view of a second embodiment of a non-return valve in a horizontal position.
In
Claims (14)
dadurch gekennzeichnet,
daß das Sperrorgan als Rückschlagklappe (1,20) ausgebildet ist.A device for preventing an exhaust gas recirculation in a boiler in the overpressure operation, wherein a plurality of boilers have a common exhaust pipe, and a supply air line of each boiler has a cross-section closing obturator,
characterized,
that the blocking member is designed as a check valve (1,20).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL08000896T PL1962017T3 (en) | 2007-02-23 | 2008-01-18 | Device for avoiding exhaust gas return flow in a boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202007002662U DE202007002662U1 (en) | 2007-02-23 | 2007-02-23 | Device for preventing exhaust gas backflow in a boiler |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1962017A2 true EP1962017A2 (en) | 2008-08-27 |
EP1962017A3 EP1962017A3 (en) | 2013-01-16 |
EP1962017B1 EP1962017B1 (en) | 2017-10-04 |
Family
ID=38038355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08000896.4A Active EP1962017B1 (en) | 2007-02-23 | 2008-01-18 | Device for avoiding exhaust gas return flow in a boiler |
Country Status (3)
Country | Link |
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EP (1) | EP1962017B1 (en) |
DE (1) | DE202007002662U1 (en) |
PL (1) | PL1962017T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20120523A1 (en) * | 2012-03-30 | 2013-10-01 | Polidoro Spa | MOBILE RAILING DEVICE FOR BURNERS |
EP3705779A1 (en) * | 2019-03-08 | 2020-09-09 | Centrotherm Systemtechnik GmbH | Exhaust gas line system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015204351A1 (en) * | 2015-03-11 | 2016-09-15 | Kutzner + Weber Gmbh | Gas line element, in particular exhaust pipe element for an exhaust system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006010099U1 (en) | 2005-01-31 | 2006-09-07 | Vaillant Gmbh | Exhaust gas flowback prevention device for heating apparatus is placed in induction path of fan, and includes diagonal surface with aperture and sealing element |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2654074A1 (en) * | 1976-11-29 | 1978-06-01 | Plein Wagner Soehne | Flue gas duct with flow regulating flap - has air inlet with slide valve and is closed by open flap |
DE19603615A1 (en) * | 1996-02-01 | 1997-08-07 | Kutzner & Weber Gmbh | Waste gas removal system for hearths in building |
DE19606403B4 (en) * | 1996-02-21 | 2006-11-30 | Centrotherm Systemtechnik Gmbh | Arrangement for connecting a combustion device to a chimney pipe |
WO2003036181A1 (en) * | 2001-10-26 | 2003-05-01 | LK Luftqualität AG | Sicherheitseinrichtung fur die luft in wenigstens einem raum eines gebaudes |
DE10359551B4 (en) * | 2003-12-17 | 2010-04-01 | Skoberne Gmbh | Backflow safety valve for exhaust systems |
-
2007
- 2007-02-23 DE DE202007002662U patent/DE202007002662U1/en not_active Expired - Lifetime
-
2008
- 2008-01-18 PL PL08000896T patent/PL1962017T3/en unknown
- 2008-01-18 EP EP08000896.4A patent/EP1962017B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006010099U1 (en) | 2005-01-31 | 2006-09-07 | Vaillant Gmbh | Exhaust gas flowback prevention device for heating apparatus is placed in induction path of fan, and includes diagonal surface with aperture and sealing element |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20120523A1 (en) * | 2012-03-30 | 2013-10-01 | Polidoro Spa | MOBILE RAILING DEVICE FOR BURNERS |
EP3705779A1 (en) * | 2019-03-08 | 2020-09-09 | Centrotherm Systemtechnik GmbH | Exhaust gas line system |
Also Published As
Publication number | Publication date |
---|---|
EP1962017B1 (en) | 2017-10-04 |
EP1962017A3 (en) | 2013-01-16 |
DE202007002662U1 (en) | 2007-04-26 |
PL1962017T3 (en) | 2018-03-30 |
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