ES2882692T3 - Shutter-type smoke extraction damper and evacuation system comprising said damper - Google Patents

Abstract

A shutter-type smoke extraction damper (1), comprising: - a frame (2) for installing the damper (1) in a smoke extraction duct; - at least one leaf (3) that is mounted on the frame (2) and can pivot about a pivot axis (A) between a closed position and an open position; - connection means (6A, 6B, 8A, 8B) between the leaf (3) and the frame (2); - a reset motor (4) provided on the sash (3) to actuate the connecting means (6A, 6B, 8A, 8B) to move the sash (3) from its open position to its closed position; characterized in that said connection means (6A, 6B, 8A, 8B) comprise: - first connection means (6A, 8A) that are located in part (6A) between the motor (4) and a first edge (B1) of the sheet (3), and part (8A) between this first edge (B1) and the frame (2), the first edge extending perpendicularly to the pivot axis (A); and - second connection means (6B, 8B) which are located in part (6B) between the motor (4) and a second edge (B2) of the blade (3), opposite the first edge (B1), and in part (8B) between this second edge (B2) and the frame (2).

Description

DESCRIPTION

Shutter-type smoke extraction damper and evacuation system comprising said damper

The present invention relates to a shutter-type smoke extraction damper and an evacuation system comprising said damper.

The gate comprises:

- a frame for installing the damper in a smoke extraction duct;

- at least one leaf that is mounted on the frame and can pivot about a pivot axis between a closed position and an open position;

- connection means between the leaf and the frame; Y

- a reset motor that is provided on the sash to actuate the connecting means to move the sash from its open position to its closed position.

Such a flap is known, for example, from EP 2320153 A1.

Typically, said gate has an essentially rectangular cross-section, and the frames of said gate typically delimit a rectangular opening.

Shutter type smoke extraction dampers are normally part of a smoke and heat evacuation system. The dampers are normally mounted in a smoke extraction duct. These evacuation systems are especially intended for the mechanical extraction of smoke from buildings in order to facilitate the evacuation of people.

Such a smoke extraction damper is normally closed and fire resistant when in the closed position. The damper opens only in case of fire to allow the controlled evacuation of smoke. The damper then opens into the smoke extraction duct. In the event of a fire, a control system opens only the dampers necessary to ensure smoke evacuation. The other gates, which cannot contribute to the desired evacuation, remain closed and must resist the fire.

During an incident, test or maintenance operation, the sash can be manually or, in certain modes, automatically returned from its open position to its closed position. To perform remote resetting, the latter embodiments comprise a resetting motor. Certain forms of louver-type smoke extraction dampers that are marketed by the applicant of the present application under the name "Avantage" are motorized in this way. Other embodiments of such a smoke extraction damper are described, for example, in EP 2320153 B1.

There is currently a trend to manufacture these gates in a more aesthetic way without a covering grid, in which the outer face is formed by a panel that allows the application of a decorative finish in harmony with the adjacent wall. Such gates are marketed, for example, by the applicant of the present application under the name "Kamouflage" and are described in documents EP 2450642B1, EP 2537562 B1 and EP 2537563 B1. It is desirable that aesthetic gates of this type can also be remotely repositioned. However, current motorized systems are not applicable to these aesthetic gates.

The device according to the invention, which is defined in claim 1, allows this drawback to be overcome. According to a first characteristic, said connecting means of a gate according to the invention comprise:

- first connection means that are located partly between the motor and a first edge of the leaf and partly between this first edge and the frame, the first edge extending perpendicularly to the pivot axis; and - second connection means that are located partly between the motor and a second edge of the leaf, opposite the first edge, and partly between this second edge and the frame.

Preferably, a motor of a smoke extraction damper to which the invention refers is not arranged along the edges of said damper to avoid an asymmetrical load on the leaf and to avoid obstacles in the duct in which the damper is installed. . With the new connection means according to the invention, it is now possible to place the motor on the leaf without these means impeding an aesthetic production of the gate. The first connecting means can be easily integrated into the sheet, while the second connecting means connection can be easily arranged along the corresponding edges of the gate, with the result that they impede the passage as little as possible. In this way, a symmetrical loading of the sheet is also possible.

According to a particular embodiment, the motor is mounted between two parallel panels of the wing, and the part of the connection means that extends between said edges of the wing extends between these two panels.

According to a robust embodiment of the invention, the motor is provided to generate a movement of a drive shaft extending between the first edge and the second edge and constituting the part of the connection means extending between the edges. of the sheet.

In such an embodiment which is provided with a drive shaft, the motor is preferably provided to generate rotational movement of an output shaft of the motor, and the gate comprises transmission means for transmitting rotational movement of the drive shaft. output in a rotational movement of the drive shaft. More specifically, these transmission means can be provided in the form of a gear mechanism.

According to a more specific embodiment, the parts of the connecting means that extend between said edges of the sash and the frame are constituted as a drive arm or a plurality of drive arms that are hingedly mounted to one another.

In the case of a plurality of drive arms that are mounted hinged to each other, it is possible to optimize the course of the torque in order to obtain a higher torque in the closed position of the wing than in the open position of the wing.

Said drive arms or sets of drive arms are preferably fixedly connected to said drive shaft at a first end and are preferably slidably mounted in corresponding slots provided in the frame at a second end.

Instead of providing said drive shaft and said drive arms, the connecting means may comprise, for example, a return cable and a winding drum which may be provided on the output shaft of the motor to receive this cable. Other solutions are conceivable.

According to a preferred embodiment of the invention, the gate comprises a spring acting on the sash to move the sash to its open position.

In said embodiment, the spring is preferably a coil spring which is positioned about said drive shaft, fixedly connected to the blade at a first end and fixedly connected to the drive shaft at a second end. There is more room around the drive shaft to use a spring that has a more constant torque, with the result that the torque does not vary much at different blade positions.

In a specific variant of the invention, the gate comprises an electronically controlled locking mechanism that is mounted on the sash. Such electronically controlled locking mechanisms are described, for example, in EP 2537562 B1 and EP 2695426 A1. In an advantageous embodiment of the invention, the gate comprises a mechanism for repositioning the locking mechanism according to the position of the sash to reposition the locking mechanism when the sash is placed in its open position. Preferably, this mechanism for repositioning the locking mechanism then comprises a rod between the locking mechanism and said drive shaft, the rod being pivotally mounted on a disc which is fixedly mounted on the drive shaft. Alternatively, but less advantageously, this rod could be fixed, for example, to the frame instead of being fixed to such a disc which is mounted on the drive shaft.

Said drawbacks of the prior art are also solved by providing an evacuation system that is intended for the mechanical extraction of smoke from a building, comprising a louver-type smoke extraction damper according to the invention, as described above.

The attached drawings illustrate the invention:

Figure 1 represents in perspective a gate according to the invention in a position between its open position and its closed position, with a part of the leaf omitted.

Figure 2 is a perspective view of the gate shown in Figure 1 with a portion of the frame omitted.

Figure 3 represents in perspective in more detail a part of the gate shown in Figure 2 at the level of the upper actuation arm of the connection means.

Figure 4 represents in perspective in more detail a part of the gate shown in Figure 2 at the level of the lower actuation arm of the connection means.

Figure 5 represents in perspective a lower part of the gate shown in the previous figures, locked and in its closed position, with a part of the leaf omitted and a part of the frame omitted.

Figure 6 is a perspective view of the gate portion shown in Figure 5, with the gate unlocked.

Figure 7 represents in perspective the part of the gate shown in Figure 5, the gate being located in a position between its open position and its closed position.

Figure 8 represents in perspective the part of the gate shown in Figure 5, the gate being placed in its open position.

The figures show a shutter-type smoke extraction damper (1) to be installed, on the wall or ceiling, in a smoke extraction duct.

The gate (1) has an essentially rectangular cross-section. It comprises a frame (2) to install the gate (1) in said duct. This frame (2) can be constructed in a known manner.

A leaf (3) is mounted on this frame (2) so that it can pivot about a pivot axis (A) between a closed position, as illustrated in Figures 5 and 6, in which the duct is closed, and an open position, as illustrated in Figure 8, in which the conduit is open. Gate (1) is normally closed. When in this closed position, the damper (1) resists fire. In case of fire, the damper (1) can be opened in the smoke extraction duct so that it does not constitute an obstacle in the areas through which people have to be evacuated.

A gate (1) can comprise a single leaf (3), as illustrated, but can also comprise a plurality of leaves.

In the figures, the pivot axis (A) extends substantially vertically, but could also extend horizontally or at an angle.

In order for the sash (3) to be able to pivot, it can be suspended by hinges on this frame or, as illustrated, by pivot hinges.

The illustrated sheet (3) comprises a first panel (5A) of refractory material that extends essentially over the entire surface of the sheet (3). A second panel (5B) of the sheet (3) of refractory material is placed at a certain distance from the first panel (5A) and parallel to this first panel (5A). This second panel (5B) also extends essentially over the entire surface of the sheet (3).

The sheet (3) additionally comprises profiled elements (14) that extend essentially on the edges (B3, B4) parallel to the pivot axis (A). These profiled elements (14) are essentially placed between said panels (5a, 5B) so that the panels (5A, 5B) and the profiled elements (14) define an internal cavity in the sheet (3). In the center, a crossbar, not illustrated, is mounted between the profile elements (14).

To open the gate (1), the latter is provided with a spring (10) that acts on the leaf (3) to move the leaf (3) to its open position. To close the gate (1), the latter is equipped with a reset motor (4). The drive of the blade (3) can be controlled remotely by means of a locking mechanism (11). The gate (1) can also be operated manually.

The motor (4) is mounted on the crossbar (not shown) between the two panels (5A, 5B) of the sash (3). The motor (4) is provided to generate a rotational movement of an output shaft of the motor (4). A gear mechanism (7) is provided for transmitting rotational movement of the output shaft into rotational movement of a drive shaft (6A, 6B). This gear mechanism (7) is provided with an automatic clutch means for engagement or disengagement, with the result that, if the motor (4) does not rotate, the blade (3) can move freely.

The drive axis (6A, 6B) extends between the opposite edges (B1, B2) of the blade (3) which extend perpendicular to the pivot axis (A). It is pivotally mounted on two corresponding fixing bodies (15) that are fixed to the first panel of the leaf (3). The drive shaft (6A, 6B) extends essentially parallel to the pivot axis (A) and has an essentially square cross-section. A first part of this drive shaft (6A, 6B) extends between the motor (4) and a first edge (B1) of the blade (3), and a second part extends between the motor (4) and a second edge (B2) of the sheet (3).

At said edges (B1, B2) of the sheet (3), the drive arms (8A, 8B) are fixedly connected to the drive shaft (6A, 6B) at a first end. These drive arms (8A, 8B) are slidably mounted at a second end in corresponding slots (9A, 9B) provided in the frame (2). Said spring (10) to move the leaf (3) to its open position is a torsion spring (10) that is mounted around the drive shaft (6A, 6B), which is fixedly connected to the leaf (3). ) at a first end and is fixedly connected to the drive shaft (6A, 6B) at a second end.

Said electronically controlled locking mechanism is also mounted on the cross member (not shown), is located between said panels (5A, 5B) and is basically constructed as described in EP 2537563 B1. The locking mechanism is equipped with a retractable bolt (19), which is spring-loaded into its locked position to close the gate (1). It comprises a fixed electrical coil (16) which is electrically actuated. In the locked position, a rear plate (17) made of ferromagnetic material is pressed against the coil (16). When the coil (16) is actuated, the rear plate (17) is released, the retractable latch (19) retracts and the gate (1) is unlocked. The retractable bolt (19) can also be operated manually by turning the key (20) in the keyhole (23).

To reposition the locking mechanism (11), in the illustrated embodiment, the rear plate (17) is attached to an additional lever (18). A rod (12) is slidably mounted on said further lever (18) of the locking mechanism (11) at a first end and is pivotally mounted on a disc (13) at another end. This disk (13) is fixedly mounted on the drive shaft (6A, 6B). An element (21) is mounted by spring (22) on the first end of this rod (12) to actuate the additional lever (18) of the locking mechanism (11) in order to reposition this mechanism (11). Alternatively, the mechanism (11) can always be repositioned manually, as described in EP 2537563 B1.

In the standby position, as illustrated in Figure 5, the sash (3) is in its closed position and the locking mechanism (11) is locked. The rear plate (17) is pressed against the coil (16) and the latch (19) holds the blade (3) in its closed position.

In case of fire, or to control the gate (1), the locking mechanism (11) can be unlocked by operating the coil (16), thus releasing the rear plate (17), as illustrated in Figure 6. In this In this way, the spring (10) pushes the leaf (3) to its open position, as illustrated in Figures 7 and 8. During this movement: - the actuating arms (8A, 8B) of the connecting means (6A, 6B, 8A, 8B) between the motor (4) and the frame (2) are guided in the slots (9A, 9B), as illustrated in Figures 6 to 8, and

- the rod (12) of the resetting means of the locking mechanism (11) is driven by the disc (13) on the drive shaft and drives the element (21) which is mounted by spring (22) to finally drive the additional lever (18) of the locking mechanism (11) in order to reposition this mechanism (11) in the open position of the leaf (3), as illustrated in Figure 8.

If the reset motor is then energized, the connecting means (6A, 6B, 8A, 8B) move the blade (3) until the blade (3) reaches its closed position, as illustrated in Figure 6. The Drive arms (8A, 8B) of the connecting means (6A, 6B, 8A, 8B) between the motor (4) and the frame (2) are then guided in the slots (9A, 9B) in the opposite direction.

According to a variant not illustrated, the connection means may comprise a return cable, and a winding drum may be provided on the output shaft of the motor to receive this cable.

The device according to the invention is especially intended for the mechanical extraction of smoke from buildings in order to facilitate the evacuation of people.

Claims (10)

1. A shutter-type smoke extraction damper (1), comprising: - a frame (2) to install the damper (1) in a smoke extraction duct; - at least one leaf (3) that is mounted on the frame (2) and can pivot about a pivot axis (A) between a closed position and an open position; - connection means (6A, 6B, 8A, 8B) between the leaf (3) and the frame (2); - a reset motor (4) provided on the sash (3) to actuate the connecting means (6A, 6B, 8A, 8B) to move the sash (3) from its open position to its closed position; characterized in that said connection means (6A, 6B, 8A, 8B) comprise: - first connection means (6A, 8A) that are located in part (6A) between the motor (4) and a first edge (B1) of the blade (3), and in part (8A) between this first edge (B1 ) and the frame (2), the first edge extending perpendicularly to the pivot axis (A); Y - second connection means (6B, 8B) that are located in part (6B) between the motor (4) and a second edge (B2) of the blade (3), opposite the first edge (B1), and in part ( 8B) between this second edge (B2) and the frame (2). 2. The gate (1) according to claim 1, characterized in that the motor (4) is mounted between two parallel panels (5A, 5B) of the leaf (3), and in that the part (6A, 6B) of the connecting means (6A, 6B, 8A, 8B) extending between said edges (B1, B2) of the sheet (3) extends between these two panels (5A, 5B). 3. The gate (1) according to claim 1 or claim 2, characterized in that the motor (4) is provided to generate a movement of a drive shaft (6A, 6B) extending between the first edge (B1 ) and the second edge (B2) and which constitutes the part (6A, 6B) of the connection means (6A, 6B, 8A, 8B) that extends between the edges (B1, B2) of the sheet (3). 4. The gate (1) according to claim 3, characterized in that the parts (8A, 8B) of the connection means (6A, 6B, 8A, 8B) that extend between said edges (B1, B2) of the blade (3) and frame (2) are constituted as actuating arms (8A, 8B) or a set of actuating arms that are hingedly mounted to each other. 5. The gate (1) according to claim 4, characterized in that the drive arms (8A, 8B) or sets of drive arms are fixedly connected to the drive shaft (6A, 6B) at a first end and are slidably mounted in corresponding slots (9A, 9B) provided in the frame (2) at a second end. The gate (1) according to any of the preceding claims, characterized in that the gate (1) comprises a spring (10) acting on the leaf (3) to move the leaf (3) to its open position. 7. The gate (1) according to claim 6 and according to any of claims 3 to 5, characterized in that the spring (10) is a helical spring (10) that is placed around the drive shaft (6A, 6B), which is fixedly connected to the blade (3) at a first end and which is fixedly connected to the drive shaft (6A, 6B) at a second end. 8. The gate (1) according to any of the preceding claims, characterized in that the gate (1) comprises an electronically controlled locking mechanism (11) that is mounted on the leaf (3) and that comprises a mechanism for repositioning the locking mechanism (11) when the blade (3) is placed in its open position. 9. The gate (1) according to claims 3 and 8, characterized in that the reset mechanism of the locking mechanism (11) comprises a rod (12) between the locking mechanism (11) and the drive shaft (6A , 6B), the rod (12) which is pivotally mounted on a disc (13) which is fixedly mounted on the drive shaft (6A, 6B). 10. The evacuation system that is intended for the mechanical extraction of smoke from a building, comprising a shutter-type smoke extraction damper (1), characterized in that the damper (1) is a damper (1) according to any of the preceding claims.