AT512666A1 - Shut-off device for closing a flow channel - Google Patents

Abstract

The present invention discloses a shut-off device (1) for closing a flow channel for air and / or gaseous media comprising a valve body (2) having a valve body passage (4) and a butterfly valve (10) mounted in the valve body passage (4) on a pivot axis (14) is pivotally mounted. Along the periphery of the butterfly valve (10), a seal (12) is arranged. The butterfly valve (10) is pivotable between an open position and a closed position, wherein in the open position of the butterfly valve (10) the valve housing channel (4) is flow-permeable, and wherein and in the closed position of the butterfly valve (10) this closes the valve housing channel (4), so that the flap housing channel (4) is impermeable to flow. According to the invention, the shut-off device (1) further comprises at least one transition piece (20) connected to the flap housing (2) with a transition channel (22) having on a side facing the flap housing (2) a first cross section corresponding to the cross-section of the flap housing channel (4). equivalent. The transition channel (22) has, on a side facing the flow channel, a second cross section which corresponds to the cross section of the flow channel. The transition piece (20) is positively and / or materially connected to the flap housing (2).

Description

* Φ

Shut-off device for closing a flow channel

The present invention relates to a shut-off device for closing a flow channel according to the preamble of claim 1.

Shut-off devices for closing a flow channel are also referred to as fire dampers. Fire dampers are used for example in ventilation ducts and flue ducts that represent flow channels and connect individual rooms or building sections with each other and / or, for example, with a ventilation or air conditioning.

In normal operation, air, or more generally a gaseous medium, should be impeded as little as possible in its flow between two rooms or building sections by means of a fire damper inserted or installed in a flow duct. However, in the event of a fire or smoke in a room or in a building section, a fire damper shall interchange air or gaseous media between the flow ducts between them Prevent connected rooms, so that heat and / or smoke can not expand or spread from one room to a connected via the flow channel with this space. 5

A fire damper typically includes a damper housing with a damper housing duct and a butterfly valve pivotally mounted therein about a pivot axis. The butterfly valve is pivotable between an open position in which the fire damper is flow-permeable, and a closed position in which the fire damper is fluid-impermeable. To improve the sealing effect in the closed position, a seal is usually arranged on the circumference of the shut-off flap, by means of which a necessary gap between the periphery of the shut-off flap and the inner wall of the flap housing in the closed position of the shut-off flap is to be sealed. On the inner wall of the valve body, a flexible band of intumescent material may additionally be applied, which comprises, for example, expanded graphite base, and which foams under high pressure under the action of heat and forms a pressure-resistant foam in the event of fire.

Between a fire damper and the flow channel 25 so-called transition pieces are usually arranged, which are also referred to as compensators. Among other things, these compensators serve to compensate for a change in length of the flow channels whose length changes with temperature. Furthermore, these compensators 30 an adjustment of the cross sections of the fire damper and the flow channel.

The installation of a corresponding fire damper is quite complex and expensive, because the compensators must first be connected to the fire damper, for example via a Flange connection, and then the compensators must be connected to the flow channel. Furthermore, both the fire dampers per se and the compensators must be stored separately in known from the prior art fire dampers.

The object of the present invention is to provide an improved fire damper which reliably seals the damper housing duct in the closed position of the butterfly valve and which has the lowest possible flow resistance in the open position and whose installation or connection to a flow duct is significantly simplified.

The object is achieved by a shut-off device 2 for closing a flow channel for air and / or gaseous media having the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims.

More specifically, the shut-off device according to the invention comprises a transition piece, which is positively and / or materially connected to the valve body. In a corresponding embodiment of the shut-off device, the installation of the shut-off device in a correspondingly designed ventilation system is particularly simplified since the connection sides of the shut-off device are adapted to the flow channel. In addition, warehousing costs, procurement costs, assembly costs, packaging costs, transport costs and administrative costs for appropriately designed waste can be reduced. 9 Φ I Φ ·

Ψ Ψ Ψ Ψ Ψ 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4

Locking devices are reduced because the shut-off must not be stored separately from the transition pieces.

By means of appropriately shaped transition pieces turbulence of the air flow between the flow channel and the shut-off device can be reduced. Corresponding transition pieces can be arranged on the inlet side of the shut-off device and / or on the outlet side of the shut-off device. In this case, the transition pieces may have different cross-sectional shapes, which are adapted to the cross-sectional shapes of the flow channel on the input side and the output side of the shut-off device.

The flow channel can be a ventilation and / or extraction channel, a delivery channel or simply a wall opening. The flap housing of the fire damper according to the invention can be connected to the flow channel, wherein in the connected state of the flap housing channel then forms a flow channel portion of the flow channel. The seal may be a circumferential sealing lip and / or a circulating belt which foams when heated, so that a heat transfer and / or a smoke transport is reliably prevented. In addition, the outside of the valve body may be thermally insulated, wherein the thermal insulation may be effected by a jacket of the valve body with a thermally insulating material. The valve housing can also be interrupted by a thermal insulation in the middle in the middle of the valve axis, wherein by means of the thermal insulation a heat transfer via the (metallic) valve housing is prevented from one room to another. 1 )

5

Preferably, the transition piece is variable in its axial extent and thus flexible. Appropriately designed transition pieces are also referred to as compensators. 5

In a corresponding embodiment of the shut-off device, for example, caused by heating changes in the length expansion of the flow channel can be compensated by these compensators, without leaks between the flow channel and the shut-off occur.

Preferably, both the flap housing channel and the butterfly valve each have elliptical cross sections 15.

A corresponding shut-off device for closing a flow channel for air and / or gaseous media achieves a reduction of the necessary torque for the transfer of the shut-off valve from the open position to the closed position and vice versa, at the same time the cross-sectional area of the flap housing channel compared to a fire damper with a circular cross-section is increased, so that the fire protection invention 25 flap in the open position has a lower flow resistance.

Since both the flap housing channel and the butterfly valve each have elliptical cross sections, the seal arranged on the circumference of the butterfly valve comes at a predetermined angular position of the butterfly valve (in the vicinity / the region of the closed position) with the flap housing channel only at two opposite

I 6

Points in contact. In a further pivoting of the butterfly valve in the direction of the closed position then successively more arcuate sealing portions come into contact with the valve housing channel, so that the 5 closing the shut-off valve necessary torque slowly and steadily increases, the torque required to overcome the static friction is constant and proportional to Contact surface steadily increases and approaching the closed position its highest value er-10 ranges, whereas the torque to overcome the deformation of the sealing lip is variable and only partially effective when swinging the butterfly valve and is not additive. Further, the ratio of the circumference to the circumference-enclosed area in an ellipse is more favorable than a rectangle or square, so that the torque to close the butterfly valve having an elliptical cross-sectional geometry 20 is smaller because of the smaller circumference as a butterfly valve with a rectangular cross-sectional geometry. Therefore, with a corresponding elliptical design of the fire damper, a drive motor for adjusting the shut-off valve may be smaller than in a fire damper with a rectangular butterfly valve.

Furthermore, a butterfly valve with an elliptical cross-sectional geometry has a large area, so that when installing the fire damper according to the invention in a rectangular or square flow channel only a small constriction through the fire damper is present, so that only small turbulence • ······ «♦ The flow of air can be effected so that the turbulence caused by the noise generation by the inventive Fire damper is reduced.

Preferably, the cross-sectional shape of the butterfly valve in the Cartesian coordinate system corresponds to the elliptic equation x a

= 1 n

Where a and b are the semiaxes of the ellipse, x is the x coordinate, y is the y coordinate, and n is a real number in the range of 10 i n i 2.

In the case of n = 2, the equation given above corresponds to the elliptic equation and the cross-sectional shape of the butterfly valve is elliptical. In the case of n > 2 corresponds to the cross-sectional shape of the butterfly valve, however, a so-called super ellipse. Super Ellipses interpolate ellipses and rectangles. The larger the exponent n, the more the corresponding superellipse adapts to the rectangle with the transverse sides a and b, so that the cross-sectional area of the corresponding superellipse increases with increasing n and equalizes the cross-sectional area of the interpolated rectangle. Ellipses and all super ellipses have the common feature that only at the four intersections of the ellipse curve with the coordinate axes, the curvature of the ellipses or super ellipse is zero. Thus, no ellipse and no super-ellipse on straight sections, so that the necessary torque for the transfer of the butterfly valve from the open position to the closed position increases only gradually. (• • • • • • • • • • • • • • • • • • • • • • • • • • • · · ······································ »8

Preferably, the exponent n is in the range between 3 > n > 2. Furthermore, the exponent n may preferably be in the range 4-n-3. Furthermore, an exponent n in the range of 5 n n > 3 advantageous, 5

The cross-sectional area of the flap housing channel preferably corresponds to the cross-sectional area of the flow channel. In a corresponding embodiment of the air flow rate is not reduced by the shut-off device according to the invention, so that the noise at the fire damper due to turbulence is maximally reduced. Furthermore, the suction power or capacity 15 is not affected by the installation of the fire damper according to the invention.

However, deviations of the cross-sectional areas of the valve body passage and the flow passage are also possible. Thus, the cross-sectional areas may vary between 5% and 10%, between 10% and 15%, between 15% and 20%, between 20% and 30% and between 30% and 50%. In this case, either the cross-sectional area of the flow channel can be greater than the cross-sectional area of the flap housing channel or vice versa.

Preferably, the shut-off device comprises a Bourdon filled with an expansion medium, which is connected to the valve body and coupled to the shut-off flap 30 movement. A Bourdon spring is a round bent bourdon tube with a cross-section that deviates from the circular shape, such as, for example, an oval, elliptical or polygonal cross-section.

Mt

»· · · · * * ≪ He cut himself under pressure. When a predetermined temperature of the expansion medium is exceeded, the volume of the expansion medium increases such that the Bourdon spring a shut-5 flap develops in the closed position converting torque. On the other hand, when falling below the predetermined temperature of the expansion medium, the volume of the expansion medium decreases such that the Bourdon spring develops a torque which converts the butterfly valve into the open position.

A corresponding embodiment of the shut-off device has the advantage that at a predetermined critical temperature considered the shut-off self-15 constantly and without the need for a control device with a temperature sensor and a drive motor, the shut-off valve in the closed position, whereby an expansion of a fire or smoke by the ventilation system is prevented. At the same time offers a correspondingly designed shut-off the advantage that falls below the critical temperature considered the shut-off valve automatically moves the butterfly valve back to the open position without, for example, a safety solder (Halteein-25 direction that melts when a predetermined temperature is exceeded) replaced would have to be.

If the butterfly valve and the flap housing channel have elliptical cross-sectional shapes, for the Überfüh-30 tion of the butterfly valve from the open position to the closed position and vice versa only a reduced torque is required, which can be easily generated by a correspondingly dimensioned Bourdon spring. ··· · ft ft ft ft ft ft ··· · ft · ft ··· · · 4 ···· · 10

The Bourdon spring can be arranged in the valve housing channel or can be arranged outside of the valve housing.

Further advantages, details and features of the invention will become apparent from the illustrated embodiments. In detail:

Figure 1: A three-dimensional transparent representation of a shut-off device with not firmly connected transition pieces, wherein the butterfly valve is in the open position; Figure 2A: The shut-off device shown in Figure 1 in plan view with transparent valve body; Figure 2B: The shut-off device shown in Figures 1 and 2A in frontal plan view; Figure 3: A three-dimensional transparent representation of the shut-off device shown in Figure 1, wherein the butterfly valve is in the closed position; Figure 4A: The shut-off device shown in Figure 3 in plan view with transparent valve body. 4B: The shut-off device in frontal plan view shown in FIGS. 3 and 4A * * ** * * «* 4« • »» · · · · · · · · · · · · · ································································ · ** «« * «MV 11 Figure 5: S i Cht; The shut-off device shown in Figures 1 to 4B in three-dimensional 5 perspective view; FIG. 6: a drawing to illustrate the matching of the area contents of a superellipse to the area of a rectangle; FIG. 7A: a three-dimensional perspective view of a transition piece connected to the shut-off device; Figure 7B is a plan view of the transition piece shown in Figure 7A; Figure 7C is a side view of the transition piece shown in Figures 7A and 7B; 20 Figure 8: The shut-off device according to the invention with two transition pieces; Figure 9: 25 A further embodiment of the shut-off device according to the invention in plan view; FIG. 10 shows a further embodiment of the shut-off device according to the invention in a top view; Figure 11 is a plan view of a modification of the embodiment of the shut-off device according to the invention shown in Figure 10 of the invention of the invention shown in Figure 10;

Figure 12: Sine three-dimensional perspective Dar position of a manual drive / safety device;

FIG. 13 shows a cross-sectional view of the drive / securing device illustrated in FIG. 12;

Figure 14: A three-dimensional perspective Dar position of a triggering device;

Figure 15 is a cross-sectional view of a portion of the butterfly valve along the periphery of which a seal comprising two sealing segments is disposed; and

FIG. 16:

A cross-sectional view of a flange profile.

In the following description, like reference numerals designate like components and like features, so that a description made with respect to a figure with respect to a component also applies to the other figures, so that a repetitive description is avoided.

Figures 1 to 5 two a shut-off without fixed to the valve body but releasably connected transition pieces. These shut-off devices are not part of the invention, but are used to describe the operation of a fire damper. With

If the detachable transition pieces 20 were to correspond to the shut-off devices of the shut-off device 1 according to the invention shown in FIGS. 1 to 5, the shut-off device 1 or FIGS. Fire damper 1 shown in an open state in which the shut-off device 1 is flow-permeable. The shut-off device 1 for closing a flow channel for air and / or gaseous media comprises a tubular flap housing 2 with a straight flap housing channel 4. The flap housing 2 is bordered by two connecting flanges 6 aligned parallel to one another. However, the flap housing 2 and thus also the flap housing channel 4 may also have a bend, so that then the limiting connecting flanges are aligned at any angle between 0 ° and 90 ° to each other. 20

In the flap housing channel 4, a butterfly valve 10 is rotatably mounted centrally at two attachment points 14, so that the butterfly valve 10 in the flap housing channel 4 about a defined by the attachment points 14 pivot axis 25 between an open position and a closed position is pivotally. In FIGS. 1, 2A and 2B, the butterfly valve 10 is in the open position, in which the valve housing channel 4 is permeable to flow. In the open position shown here, 30 is the normal of the butterfly valve 10, which is perpendicular to the surface of the butterfly valve 10, perpendicular to the central axis of the valve body 2. However, in the open position of the butterfly valve 10 whose normal also one of 90 ° •

14 deviating angle with the central axis of the valve body 2 include, as long as it is only ensured that the valve body passage 4 is flow-permeable. From FIG. 1 it can be seen that along the circumference of the shut-off flap 10, a seal 12 is arranged circumferentially. The seal 12 of the butterfly valve 10 serves to seal a gap between the butterfly valve 10 and an inner wall of the flap housing 2 in the closed position of the butterfly valve 10 shown in Figures 3, 4A and 4B, in which the valve housing channel 4 is impermeable to flow.

The butterfly valve 10 is pivotable between the open position and 15 of the closed position by means of a drive device 40. In this case, the drive device 40 can be configured as an electric motor 40, as a hydraulic motor 40 or as a manually operable drive device 40. The drive device 40 is coupled by means of a three-part 20 transmission linkage 42 with the butterfly valve 10.

Furthermore, the shut-off device 1 comprises a protruding into the valve housing channel 4 temperature sensor 16, 25 which may be connected to the drive means 40 via a signal line, not shown. The drive device 40 may have a control device that controls the operation of the drive device 40. Alternatively, a separate and not shown Steue-30 tion device can be used, which is connected to the drive device 40 and the temperature sensor 16 via signal lines, not shown. 15

When a predetermined temperature, for example 70 ° Celsius, is exceeded, the control device controls the drive device 40 such that it pivots the shut-off flap 10 via the transmission link 42 from the open position to the closed position, so that the flap housing channel 4 is no longer permeable to flow in the closed position is.

It can be seen from FIGS. 1, 2A and 2B that in each case one transition piece 20 is fastened to each of the two connecting flanges 6 of the flap housing 2, which are each arranged between the flap housing 2 and the flow channel (not illustrated). However, the flap housing 2 can also be directly connected to a flow channel by means of the two connecting flanges 6. The transition pieces 20 each have a transitional channel 22 which is delimited by a first connection flange 24 and by a second connection flange 26. The first connection flange 24, which faces the flap housing 2 and is connected to the connection flange 6, has a first cross section which corresponds to the cross section of the flap housing channel 4. Since the cross-section of the flap-housing channel 4 is elliptical or super-elliptical 25, the first cross-section of the transitional channel 2 is also elliptical or superelliptic. The second connection flange 26, which faces the flow channel and can be connected thereto, has a second rectangular cross-section, which corresponds to the cross-section of the flow channel.

It can be seen from FIG. 2B that the cross-sectional area of the flap housing channel 4 is approximately the same size as the cross-sectional area of the transition channel 22 in the region of the second connecting flange 26 and thus approximately the same size as the cross-sectional area of the flow channel (not shown).

FIG. 6 shows a schematic representation of the cross-sectional areas of the flap housing channel 4 and of the flow channel and thus of the transition channel 22 in the region of the second connection flange 26. In this case, Fl denotes the cross-sectional area of the flap housing channel 4, and thus the surface of a superellipse, since the cross-sectional area of the flap housing channel 4 is a superellipse in the illustrated embodiment. F2 denotes the area of the flow channel. The rectangular cross-sectional area F2 of the flow channel has a rectangular width Ra and a rectangular height Rb. In contrast, the width extension al of the super ellipse is greater than the rectangular width Ra and the height extent bl of the superellipse is also greater than the rectangular height Rb.

The height and width extents of the rectangle and the superellipse are chosen such that the areas Fl and F2 are identical. Although the surface Fl does not completely cover the corner regions of the surface F1, the widthwise extension al and the vertical extension bl of the superellipse are larger than the rectangle width Ra and the rectangle height Rb.

The cross-sectional area of the flap housing channel 4 thus corresponds to the cross-sectional area of the flow channel. However, deviations of the cross-sectional areas of the valve body passage 4 and the flow channel are also possible. Thus, the cross-sectional areas can be between 5% and 17%, between 10% and 15%, between 15% and 20% and between 20% and 30% and between 30% and 50%. In this case, either the cross-sectional area of the flow channel can be greater than the cross-sectional area of the flap housing channel 4 or vice versa.

In Figures 3, 4A and 4B, the shut-off device 1 shown in Figures 1, 2A and 2B is shown in the closed position in which the valve body passage 4 is fluid-impermeable. In the closed position shown in the figures, the normal of the butterfly valve 10 and the central axis of the valve body 2 are parallel to each other, so that the butterfly valve 10 is perpendicular to the valve housing channel 4. However, in the closed position of the butterfly valve 10, these need not necessarily be perpendicular to the valve housing channel 4 when the butterfly valve is dimensioned accordingly. Then, to transfer the shut-off valve 10 from the open position into the closed position, it does not have to be pivoted by 90 °, but by a smaller angle.

By activating the drive device 40, for example by a control device, not shown, which is connected to the drive device 40 and the temperature sensor via a signal line, a torque generated by the drive means 40 by means of the three-piece transmission link 42 is transmitted to the pivot axis 14 of the butterfly valve 10, so that the butterfly valve 10 is pivoted from the open position to the closed position.

The following is assumed that the open position of the butterfly valve 10 corresponds to a 0 ° position, Μ Μ «ft ft ft ft ft« «· ft ft · · · · * * * 18 18 18 that the closed position of the butterfly valve 10 corresponds to a 90 "position. When transferring the butterfly valve 10 from the open position to the closed position, the seal 12 surrounding the butterfly valve 10 comes into contact with the inner wall of the flap housing 2 and thus with the flap housing channel 4, for example at an 85 ° position of the butterfly valve 10. Depending on the dimensions of the seal 12, the valve housing channel 4 and the butterfly valve 10 but the contact can be made at other angular positions of the butterfly valve. Due to the elliptical or superelliptic cross-sectional shape of the butterfly valve 10 whose cross section in the Cartesian coordinate system by the ellipse equation X n V - + ab is described, where a and b are the semi-axes of the ellipse, x the x-coordinate, y the y-coordinate and n is a real number, comes the seal 12 in the 85 ° position only at two opposite points with the inner wall of the valve body 2 in contact.

In a further pivoting of the shut-off valve 10 in the direction of the closed position and thus in the direction of the 90 ° position, further successive further arcuate sealing portions of the seal 12 come into contact with the inner wall of the valve body 2. Thus, at the angular position where the seal 12 first contacts the flap housing channel 4 (85 ° in the upper example), the seal 12 does not contact the flap housing channel 4 over its entire length extent with the flap housing channel, so that the seal 12 are not deformed over their entire length extension

19 must. Furthermore, the static frictional force between the damper housing channel 4 and the seal 12 continuously increases upon pivoting of the butterfly valve 10 in the 90 ° position. The torque to be applied by the drive device 40 consequently increases continuously when the shut-off flap is transferred to the closed position. When transferring a rectangular butterfly valve in a rectangular valve housing channel, however, the maximum torque must be generated immediately upon first contact of the seal with the valve housing channel.

Moreover, the ratio of the circumference to the circumference-enclosed area in an ellipse is more favorable (smaller) than that of a rectangle or a square, so that the applied torque for closing the butterfly valve 10 having an elliptical or super-elliptic cross-sectional geometry due to smaller circumference is smaller than a butterfly valve 10 with an example rectangular cross-sectional geometry. Therefore, in an elliptical embodiment according to the invention, the fire damper 1 or the butterfly valve 10 and the valve housing channel 4, the drive means 40 for pivoting the butterfly valve 10 smaller than a fire damper with a rectangular butterfly valve.

As already explained above with reference to FIGS. 2B, 4B and 6, the butterfly valve 10 with an elliptical or superelliptic cross-sectional geometry has a large surface area. Thus, when installing the fire damper 1 according to the invention in an example rectangular or square flow channel no or only a small constriction through the • «* ♦« »# + * 20

Fire damper 1 before, so that only small turbulence of the flow air are effected. This reduces the turbulence-related noise development by the fire damper 1 according to the invention.

In the shut-off device 1 shown in Figures 1 to 5, the shut-off device 1 is connected to two transition pieces 20 via a connecting flange 6, each having a first connecting flange 24 of the transition pieces 20.

From Figure 8 it can be seen that the valve body 2 with the transition pieces 20 is firmly connected. The flap housing 2 has an inspection opening 8 for the maintenance of the shut-off device 1. This inspection opening 8 can also be provided in the shut-off device 1 shown in FIGS. 1 to 5.

FIGS. 7A, 7B and 7C show a transition piece 20 in a three-dimensional perspective view, in a plan view and in a side view. In this illustrated transition piece 20, the cross-sectional area of the flow channel-side end is smaller than the cross-sectional area of the valve body side end, so that consequently the cross-sectional area of the shut-off device 1 and the cross-sectional area of the butterfly valve 10 is greater than the cross-sectional area of the flow channel. The end surface 24 is fixedly connected to the flap housing 2, not shown, whereas the end surface 26 may have a connection flange. The transition piece 20 shown in Figures 7A to 7C can be cut out of a sheet material (eg a sheet, a flexible and refractory sheet, etc.), and * · · «·· ··

21 by joining together and joining together two free ends of the cut-out sheet material, the three-dimensional transition piece 20 shown in Figures 7A to 7C.

In the shut-off device 1 shown in Figure 9, the valve body 2 is integrally formed with the transition pieces 20. The shut-off device 1 shown in Figure 9 has on its outer side fasteners 19 in the form of threaded rods 19 aufr by means of which the shut-off device 1 can be fixed for example in a masonry or on a mounting structure. Of course, these fastening devices 19 can also be used in the shut-off devices 1 according to FIGS. 1 to 8.

It can also be seen from FIG. 9 that the left-hand side of the flap housing 2 is provided with a circulating thermal insulation 18, so that a heat transfer from the blocking device 1 to a substructure or to a wall construction is reduced.

In the illustration of FIG. 9, the right-hand side of the shut-off device 1 represents the motor side, that is to say the side of the shut-off device 1 on which a withdrawal motor or a fan is arranged. The left side of the shut-off device 1 shown in Figure 9 represents the side that is connected to a ventilation system. By closing the butterfly valve 10 can warm or hot air and smoke only reach the butterfly valve 10, so that the thermal insulation 18 is disposed only in this area around the valve body 2. 22

FIG. 10 shows a further embodiment of the shut-off device 1 according to the invention. The shut-off device 1 comprises a Bourdon spring 30 filled with an expansion medium, which is connected to the flap housing 2 and 5 is coupled in a motion-coupled manner to the shut-off flap 10. The Bourdon spring 30 is a round bent tube spring 30 with an oval cross section, which bends under internal pressure. The Bourdon spring 30 can be arranged either in the valve housing channel 4 or outside the valve housing 10 channel 4 and thus on the outside of the valve housing 2.

When exceeding a predetermined temperature of the expansion medium, for. B. when exceeding 72 ° C, 15 increases the volume of the expansion medium such that the Bourdon spring 30 develops a valve 10 in the closed position converting torque. In Figure 10, the shut-off device 1 is shown, in which the butterfly valve 10 is in the closed position. In 20 closed position of the butterfly valve 10, the butterfly valve 10 abuts against a stop 9, so that over-rotation of the butterfly valve 10 over the closed position is also avoided. On the other hand, when the temperature of the expansion medium lowers again below the predetermined temperature, the expansion medium 10 contracts, so that the volume of the expansion medium decreases. Due to the reduction of the volume of the expansion medium 30, the pressure within the Bourdon spring 30 decreases so that it generates a torque which converts the butterfly valve into the open position. ·········································································································.

In the embodiment of the shut-off device 1 shown in FIG. 10, the Bourdon spring 30 is arranged on the pivot axis 14. In the embodiment according to FIG. 11, the Bourdon spring 30 is not arranged on the pivoting axis 14. Rather, a free leg of the bourdon spring 30 is connected via a two-part transmission linkage 32 with the butterfly valve 10. Thus, the Bourdon spring 30 is coupled by means of the gear train 32 with the butterfly valve 10. The remaining functioning 10 of the shut-off device 1 shown in FIG. 11 is identical to the functioning of the shut-off device 1 shown in FIG.

The use of a Bourdon spring 30 as Antriebseinrich-15 tion for the butterfly valve 10 has the advantage that when exceeding a critical temperature considered the shut-off device 1 independently and without the need for a control device with a temperature sensor and a drive motor, the butterfly valve 10 20 are transferred into the closed position can, whereby the expansion of a fire or smoke is prevented by the ventilation system. At the same time, the use of a Bourdon spring 30 in a shut-off device 1 offers the advantage that when the temperature falls below the predetermined temperature regarded as critical, the shut-off device automatically moves the shut-off flap 10 back into the open position. A known from the prior art fusible link, which holds the butterfly valve 10 in the open position and melts when exceeding the predetermined temperature, must not be replaced for reuse.

It should be noted that a transfer of the shut-off valve 30 24 10 in the closed position by the Bourdon spring 30 only makes sense and possible if the temperature development was not so great that the butterfly valve has been destroyed 10 due to high temperatures. The Bourdon spring 30 therefore ensures a safe transfer of the butterfly valve 10 in the closed position when exceeding the predetermined temperature {72 ° C, for example), whereas the Bourdon spring 30, the butterfly valve 10 can only convert back to the open position, if 10 the butterfly valve 10 due to very high temperatures has not been destroyed. If, however, only a cold room development was present, the butterfly valve 10 is reliably transferred by means of the Bourdon spring 30 falls below the predetermined temperature again in the Offenstel-15 development.

In Figures 12 and 13, a manual drive / Si-cherungseinrichtung 50 is shown, which can be used instead of the drive means 40 or instead of the Bourdon spring 30 20 or alternatively in addition to the Bourdon spring 30 and to the drive means 40. The manual drive / securing device 50 comprises a drive shaft 51 which can be coupled in motion with the pivot axis 14 of the butterfly valve 10. The drive shaft 51 is 25 rotatably connected to a biasing means 54 in the form of a torsion spring 54 by means of a disc 52, wherein the disc 42 with the drive shaft 51 and with the torsion spring 54 is fixedly connected. The torsion spring 54 is also connected to a housing 58 of the manual drive / safety device 50 30.

The torsion spring 54 biases the drive shaft 51, and thus the butterfly valve 10, in such a way that the shaft which is driven by the drive shaft 9 9 9 9 9 9 51 motion-coupled shut-off valve 10 is biased in the direction of the closed position. The manual drive / safety device 50 also includes two holding devices 53 in the form of safety levers 53, which engage in recesses of the disc 52 and prevent the drive shaft 51 from rotating. The holding devices 53 are slidably mounted on guide pins 55 and biased by compression springs 56.

By pressing the locking lever 53 shown in Figure 13 above against the biasing force applied by the compression spring 56, the holding device 53 no longer engages in a correspondingly provided recess of the disc 52, so that the torsion spring 54, the drive shaft 51 and the motion-coupled to the drive shaft 51 butterfly valve 10 can transfer into the closed position.

The holding device 53 shown in Figure 13 below attacks when transferring the butterfly valve 10 in the closed position in a correspondingly provided further recess of the disc 52, so that the butterfly valve 10 can not be pivoted from the closed position into the open position. Only by pressing the holding device 53 shown in Figure 13 below against the biasing force applied by the compression spring 56, the butterfly valve 10 can be transferred by means of a rotatably connected to the drive shaft 51 operating lever · 57 of the closed position back to the open position, whereby the torsion spring 54 is biased again becomes.

From FIG. 12 it can be seen that a bore 59 for a release pin 61 is provided in the housing 58 at the front. 26

FIG. 14 shows a triggering device 60. The triggering device 60 comprises a triggering pin 61, which is displaceably mounted in a pin guide 62. The release pin 61 is in contact with a bolt 64 which is connected to the pin guide 62 by means of a holding device 65 or securing device 65 designed as a fusible link 65 by means of a further bolt. Between the two bolts, a compression spring 63 is arranged, which is biased in the state shown in Figure 14, that is compressed. When a predetermined temperature is exceeded, the melting solder 65 melts, so that the bolt 64 is displaced by the compression spring 63. Due to the connection of the trigger pin 61 with the bolt 64, the trigger pin 61 is pushed out of the pin guide 62.

As already mentioned above, the trigger pin 61 of the triggering device 60 can protrude through the bore 59 of the housing 58 and are in contact with the locking levers 13 shown in FIG. When a predetermined temperature is exceeded, the release pin 61 is pushed further into the housing 58 by means of the compression spring 63, so that the release pin 61 presses the securing lever 53 as described above against the applied by the compression spring 56 biasing force to the rear. Thus, the torsion spring 54 is released, so that the torsion spring 54, the drive shaft 51 and the motion-coupled to the drive shaft 51 the butterfly valve 10 can transfer into the closed position.

By means of the manual drive / safety device 50 shown in FIGS. 12 to 14, the butterfly valve 10 can be manually transferred from the open position to the closed position. In addition, you can use the ··· * «· ** *» »· · · · * * ···········································································. The shut-off flap 10 can be transferred from the open position into the closed position by simply actuating a holding device 53, and furthermore the shut-off flap 10 can automatically be moved by means of the releasing device 60 and the manual drive / securing device 50 are transferred from the open position to the closed position.

The described manual drive / safety device 50 is fastened to the outside of the shut-off device 1 together with the release device 60, so that after triggering the release device 60, the fusible link 65 or directly the entire release device 60 can be exchanged without problems without the shut-off device 1 must be opened.

Figure 15 shows a cross-sectional view of a portion of the butterfly valve 10 in the closed position {left in Figure 15) and in a position between the closed position and the open position (right in Figure 15). The seal 12 arranged along the circumference of the butterfly valve 10 comprises two sealing segments 12a, 12b which have semicircular cross-sections. In the flap housing duct 4, not shown in FIG. 15, two beads are provided on its inner wall, against which the sealing segments 12a, 12b rest positively in the closed position of the shut-off flap 10. The seal 12, which may also be referred to as a sealing lip 12, consists of an elastic material, for example an elastomer such as PVC, PU or synthetic rubber (EDPM), having a hardness of, for example, Shore A 65, at lower temperature loads and silicone rubber at higher Temperature loads, The upper, the flap housing channel facing hollow stiffened with internal framework struts such that upon pivoting of the butterfly valve 10 in the closed position, the laterally resulting, perpendicular to the geometric center of the butterfly valve 10 5 acting force prevents the sealing lip 12 at the lateral offset. The lower chamber is suitable for receiving an intumescent semi-rigid band. The sealing lip 12 is connected during the strapping of the flap 10 by radially aligned bores and fittings 13 with the 10 flap 10.

The second connecting flange 26 of the transition piece 20 comprises a flange profile 27. Figure 16 shows a corresponding flange 27 in cross-section. The flange profile · 15 27 has a central mounting leg 27a, which is aligned transversely to the longitudinal or mounting direction of the transition piece 20 in the mounted state. Channel inside, so facing the transition channel 22, the mounting leg 27a goes into a U-shaped groove 27b, 20 does not necessarily have to be designed rectangular, but for example, may also have a more circular shaped like a bead undercut, as this basically DE 41 40 870 Al is known. The inner material end 27c of the flange material is folded over protruding in the direction of the groove 27b in the cross-section according to FIG. 16 and thus forms a retaining strip 27d similar to barbs.

The outer end edge 27c of the flange profile 27 lying opposite the material end 27c is folded twice convex 29 and once concave to form a transverse stiffening angle 27f extending transversely to the mounting leg 27a and overhanging the mounting leg 27a, and then enters a parallel leg 27g over, which adjacent to a small distance and parallel or at least approachally parallel to the mounting leg 27a. The boundary edge 27e then ends 5 just before the cross-sectionally U-shaped groove 27b.

An anchoring lip (not shown) of a jacket material which forms the wall of the transition piece 20 can be inserted into the groove 27b and engage behind the retaining strip 10 27d. After insertion of this sealing lip, for example, a bellows, in the corresponding circumferential groove 27 b of the first flange 24 or the second flange 26, the bellows is captively fixed to the flange 27. 15

The flange profile 27 does not necessarily have the parallel leg 27g, because the functionality described above is achieved without the parallel leg 27g. 20

Φ 30

List of references: 1 2 4 6 8 9 10 12 12a, 12b 13 14 16 18 19 20 22 24 26 27 27a 27b 27c 27d 27e 27f 27g 28 30 32

Shut-off device, fire damper

flap housing

Flap housing channel

Connection flange (of the flap housing)

inspection opening

attack

butterfly valve

poetry

Sealing segment screwing

Mounting point, swivel axis temperature sensor thermal insulation (of the damper housing) fixing device, threaded rod transition piece transition duct first connection flange (of the transition piece) second connection flange (of the transition piece)

Flange

Mounting leg

groove

Material end (of flange profile)

Retaining strip (of the flange profile)

boundary edge

Versteifungsabwinkelung

Parallel leg crimping edge (of the transition piece)

Bourdon

Transmission linkage (between Bourdon spring and butterfly valve)

Drive device, motor 40

I 31 42 Transmission linkage 50 Manual drive / safety device 51 Drive shaft (the manual drive device) 52 Washer (the manual drive device) 53 Holding device / safety lever (the manual drive device) 54 Pretensioning device, torsion spring 55 Guide pin 56 Compression spring 57 Operating lever 58 Housing 59 Hole for release pin 60 Triggering device 61 Release pin 62 Pin guide 63 Compression spring 64 Bolt 65 Holding device, fusible link

Fl Area of the superellipse F2 Area of the rectangle

Ra rectangle width

Rb Rectangle height al Width extension of superellipse bl Height extension of superellipse

Claims (15)

1. A shut-off device (1) for closing a flow channel for air and / or gaseous media, wherein the shut-off device (1) has the following features: the shut-off device (1) comprises a flap housing (2) with a flap housing channel (4); the shut-off device (1) comprises a shut-off flap (10) which is pivotally mounted in the flap housing channel (4) on a pivot axis (14); along the periphery of the butterfly valve (10) a seal (12) is arranged; the butterfly valve (10) is pivotable between an open position and a closed position; in the open position of the butterfly valve (10), the flap housing channel (4) is flow-permeable; and in the closed position of the butterfly valve (10) closes the flap housing channel (4), so that the flap housing channel (4) is impermeable to flow, characterized by the following features: the shut-off device (1) further comprises at least one transition piece (2) connected to the flap housing (2) ( 20) with a transition channel (22); the transition duct (22) has on a side facing the flap housing (2) a first cross section which corresponds to the cross section of the flap housing channel (4); the transition channel (22) has on a side facing the flow channel a second cross section, 33 which corresponds to the cross section of the flow channel; and the transition piece (20) is positively and / or cohesively connected to the flap housing (2). 2. Shut-off device (1) according to claim 1, characterized in that the transition piece (20) is invariable in its axial extent and thus rigid. 3. Shut-off device (1) according to claim 1, characterized in that the transition piece (20) is variable in its axial extent and thus flexible. 4. shut-off device (1) according to one of vorangehendne claims, characterized in that the flap housing channel (4) and the butterfly valve (10) each have elliptical cross-sections. 5. Shut-off device (1) according to claim 4, characterized in that the cross-sectional shape of the butterfly valve (10) in the Cartesian coordinate system corresponds to the ellipse equation, where a and b are the semiaxes of the ellipse, x the x coordinate, y the y coordinate and n are a real number in the range 10 n £ 2. 6. Shut-off device according to one of claims 4 or 5, characterized in that the elliptical shape of the cross section of the butterfly valve (10) is approximated by a polygon. • fr «fr ··« · • »fr« frfrfr 34 7. Shut-off device (1) according to one of the preceding claims, characterized in that the cross-sectional area of the flap housing channel (4) corresponds to the cross-sectional area of the flow channel. 5 8. shut-off device (1) according to one of the preceding claims, characterized in that the transition piece (20) is formed from a sheet material, wherein the sheet-like material has a shape such that by joining two end edges of the sheet material, the transition piece ( 20) is formed. 15 20 9. Shut-off device (1) according to one of the preceding claims, characterized by the following features: the transition piece (20) comprises connection flange (26); the connection flange (26) comprises a flange profile (27); and - the flange profile (27) comprises a mounting leg (27a) and a mounting groove (27b) into which a retaining strip (27d) protrudes. 10. Shut-off device (1) according to one of the preceding claims, characterized by the following features: the shut-off device comprises a Bourdon spring (30) filled with an expansion medium; the bourdon spring (30) is connected to the valve body (2) and is coupled in motion with the butterfly valve (10); when a predetermined temperature of the expansion medium is exceeded, the volume of the expansion medium increases such that the Bourdon spring (30) develops a torque which converts the shut-off flap (10) into the closed position; and Falls below the predetermined temperature of the expansion medium, the volume of the expansion medium decreases such that the Bourdon spring (30) a the butterfly valve (10) in the open position überfüh-5 rendes torque developed. 11. Shut-off device (1) according to one of the preceding claims, characterized in that the shut-off device (1) with the shut-off flap (10) bewegungs-10 coupled drive means (40), by means of which the butterfly valve (10) motor between the open position and the closed position is pivotable. 15 20 25 12, shut-off device (1) according to one of the preceding claims, characterized in that the shut-off device (1) comprises a movement-coupled with the shut-off valve (10) operating lever (57) by means of which the butterfly valve (10) manually pivotable between the open position and the closed position is. 13. shut-off device (1) according to any one of the preceding claims, characterized by the following features: the shut-off device (1) comprises a biasing means (54) which biases the shut-off valve (10) to the closed position; the shut-off device (1) comprises a holding device (53) which holds the shut-off flap (10) in the open position; and when a predetermined temperature within the shut-off device (1) is exceeded, the holding device (53) releases the shut-off flap (10), so that the shut-off flap (10) is pivoted into the closed position by means of the pretensioning device (54). 30 *% Λ * r · + «· ι; • · »« «36 14. Shut-off device (1) according to one of the preceding claims, characterized by the following features: on an inner wall of the flap housing (2) two circumferential beads are provided; 5 - the seal (12) comprises two sealing segments (12a, 12b); and in the closed position of the butterfly valve (10), the sealing segments (12a, 12b) are positively against the beads of the flap housing (2). 10 15. Shut-off device (1) according to one of the preceding claims, characterized in that on an inner wall of the flap housing (2) a circulating belt is arranged, which is in the closed position of the butterfly valve (10) with 15 of the seal (12) in contact and at Exceeding a predetermined temperature foams.