JPH061711Y2 - Damper - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention is a gas-type fixed type fire extinguishing equipment using an extinguishing agent such as carbon dioxide, a halide, etc. The present invention relates to a damper which is directly attached to a building structure so as to automatically close the vent when the fire extinguishing equipment is started so that the emitted fire extinguishant does not flow out of the closed compartment.

○ Prior Art Although there are various types of dampers described above, there are problems in airtightness when closed and safety when closed, especially for large dampers that are directly attached to a building structure.

If airtightness is low when closed, extinguishant will flow out of the room, reducing the extinguishant concentration and reducing the fire extinguishing effect.For example, if the extinguishant is carbon dioxide, the extinguished carbon dioxide will cause acid flow in the room facing the compartment. There is a possibility of personal injury due to lack of status, and there is a problem in safety.

As a known damper used for smoke prevention, fire prevention, etc., a blade type is generally used, and one or more blades,
It is composed of an outer frame and an edge provided on the outer frame.

FIG. 11 shows an example thereof, and the blade 31 and the blade 31, and the blade 31 and the edge.
It has a structure in which it is overlapped with 33, and it has the advantage of requiring a small installation space, but this structure requires complicated bending work to cut off the plate thickness of the blade and edge members. In particular, if it is desired to increase the airtightness, it is necessary to use a dedicated mold, jig, or the like to improve the processing accuracy. A small size and suitable for mass production are good, but they are not suitable for manufacturing one product.

As for large dampers that are directly attached to buildings, it is difficult to mass-produce them due to the size of the openings in the buildings, and because they are directly attached to buildings, rigidity is required and the plate thickness of the members becomes thicker. There is a problem that complicated bending cannot be performed.

Therefore, for large-scale dampers that are directly attached to buildings, the present situation is to make the bending part as simple as possible by adopting a structure like the twelfth structure.

However, a damper such as the twelfth one has a blade 31 due to its structure.
Since the gap between the outer frame 32 and the outer frame is large, and the plate thickness of the member is large, the bending accuracy of the blades 31 is poor, and the gap between the blades 31 is large, which makes it difficult to ensure airtightness. . For example, in the case of a damper having four blades and a size of 2 m × 1 m, if the gap between the vane 31 and the outer frame 32 and the vane 31 and the vane 31 is 5 mm on average, the gap area is 0.5 × (200
× 5 + 25 × 8) = 600cm ² = 0.06m ² and the ratio to the closed area 2m ² is 3%. Furthermore, in actual equipment, there is distortion of the blade itself and distortion in mounting, and this gap is further growing.

In order to solve the above-mentioned problem, the bent portion of the blade is further simplified, and as shown in FIG.
There is a packing 34 provided on the edge 33 and the blade 31 and the contact surface of the blade 31, but with the elastic packing 34 suitable for such a damper, there is a problem in fire resistance and heat resistance. Is unsuitable as In addition, the packing 34 needs to be replaced periodically because it has aged deterioration (deterioration).
Further, the one provided with the packing 34 has a problem that the closing device becomes large in size because the force required for the closing is large (for example, it is necessary for the closing when the packing is provided in the damper of FIG. 13 described above). Calculate the rotational moment: Even with a soft packing, the force required to compress a 10 cm long packing by 3 mm is about 1.5 kgf.
The rotation moment required for closing when packing is provided on all overlapping parts of the m x 1 m damper is {1.5 x 2
00/10 x 12.5 x 2 + 1.5 x (12.5 x 2/10) x 6.25 x 2}
X4 ≈ 3200 kgf.cm, which requires a very large closure device).

○ Means for solving the above problems The present invention has an edge having the same plate thickness and the same plate thickness on the inner surface side of the outer frame of the damper, the plane including the edge has the center of rotation, and is closed. A damper blade having the same plate thickness as that of the edge is provided so that the position of the edge is flush with the edge, and a gap is provided between the edge and the damper blade in the closed position and between the adjacent damper blades. Install a reinforcing plate for the damper blade so as to cover it.

Examples Examples will be described below based on examples shown in the drawings.

1 to 6 show a first embodiment of a damper A embodying the present invention, which includes an outer frame 2 which is located around a ventilation port B in a closed compartment and fixed to a building structure C, and It is composed of an edge 3 welded to the inner peripheral surface of the outer frame 2, a damper blade 1, and a reinforcing plate 4. The edge 3 is formed of a member having an L-shaped cross section, and is formed on the inner peripheral surface of the outer frame 2. It is made of a member having the same plate thickness so as to have the mounting portion 3b to be fixed and the operating portion 3a and the operating portion 3a to have the same plane.

The edge 3 is continuous on the inner surface side of the outer frame 2 over substantially the entire circumference, but is cut out at a portion intersecting with the support shaft 8 of the damper blade 1 and is partially discontinuous.

The plurality of damper blades 1 are positioned so that their closed positions are in the same plane (xx) as the action portion 3a of the edge 3, and the rotation center p thereof is also in the same position as the plane (xx). And That is, a plane passing through the center of the acting portion 3a in the thickness direction (X
-X), the center in the thickness direction of the damper blade 1 in the closed position and the rotation center p of the damper blade are positioned.

In the first embodiment of the bearing mechanism shown in FIGS. 3 to 6, the central portion of the damper blade 1 is bent in a V shape at a portion facing the support shaft 8 to form a concave portion 1a. The fixing plate 5 having the recesses 5a facing each other is provided, and the recesses 1a and the recesses 5 are provided.
With the support shaft 8 sandwiched from both sides so that the support shaft 8 is located between a, the damper blade 1 and the fixing plate 5 are fixed with a small screw 6
And the damper blades 1 and the fixing plate 5 are fixed to the support shaft 8 by means of machine screws 7 (see FIG. 6).

The edge 3 is notched only in a portion corresponding to the bearing 9 with respect to the support shaft 8, and the end face 3c is brought into contact with the peripheral surface of the bearing 9 so as to be substantially continuous all around the bearing 9 (see FIG. 5). ). The bearing 9 is welded to the edge 3 or the outer frame 2.

In the second embodiment of the bearing mechanism shown in FIGS. 7 to 9, two fixing plates 5 and 5'having concave portions 5a and 5a 'facing each other are used to form a support shaft between the concave portions 5a and 5a'. 8
The damper blade 1 and the fixing plates 5 and 5'are fixed to each other with a small screw 6 with the support shaft 8 being sandwiched so as to position the damper blade 1 and the fixing plates 5 and 5 '. ′ Is fixed to the support shaft 8 (see FIG. 9).

The support shaft 8 is driven by the operation of the cylinder 13 via the arms 11 and 12, so that the damper blade 1 can be freely changed between a closed position shown by a solid line and an open position shown by a virtual line.

In the closed position of the damper blade 1, the gap G ₁ between the edge 3 and the damper blade 1 and the adjacent damper blade 1,
The reinforcing plate 4 covering the gap G ₂ between the _two is fixed to the end of the damper blade 1. In the embodiment, the reinforcing plates 4 are attached on the upper and lower sides of the damper blade 1 on the opposite sides, and the reinforcing plates 4 of the adjacent damper blades 1 are opposed to the gap G ₂ .

Fig. 10 shows an example of a gas system fixed type fire extinguishing equipment, D is a closed compartment, 14 is an extinguishant container, 15 is piping, 16 is a selection valve, 17 is a copper pipe, 18 is a check valve, 19 is a discharge valve. , 20 is a radiation nozzle, 21 is a control panel, 22 is wiring, 23 is a container valve opening device, 24 is a selection valve opening device, and 25 is a start push button.

The damper blade 1 is normally in the open position shown by the phantom line in FIG. 1, but when the fire is extinguished, the support shaft 8 is moved by the operation of the cylinder 13.
Is rotated to the closed position shown by the solid line in FIG. In the closed position, the gaps G ₁ , G ₂ are covered with the reinforcing plate 4. Therefore, the airtightness of the closed section D is improved.

In the embodiment, the cylinder 13 operated by gas pressure is used.
Although the support shaft 8 is configured to be rotationally driven by the above, it is needless to say that the support shaft can be rotationally driven by a self-weight type, a spring type, an electric type, or the like.

○ Effects of the invention (1) By overlapping the reinforcing plate and the edge of the damper blade and the reinforcing plate and the damper blade of the damper blade, the gap is significantly reduced and the airtightness is improved even without packing.

(2) Since the blades and edges have the same plate thickness, the gap except the bearing is theoretically close to zero.

(3) Since the bending of the blades is minimized and a combination of flat plates is used, there are advantages such as no need for a dedicated die, suitable for small lots of many types, good processing accuracy, and compatible with large dampers.

(4) Since packing is not required, damper blade and edge,
There is no need to press the damper blade and damper blade,
Since the rotation force of the support shaft is small, the closing device can be downsized. Further, since excessive force is not applied to the damper blade and the support shaft, deterioration due to repeated operation is small and durability is improved.

(5) Since the edge was cut out at the location of the spindle to make it partially discontinuous,
Since the plane of the edge and the center of rotation of the damper blade can be made to be in the same plane, the bearing structure of the damper blade can be simplified.

[Brief description of drawings]

FIG. 1 shows a damper showing an embodiment of the present invention, wherein FIG. 1a is a vertical sectional view, FIG. 1b is a detailed sectional view of a portion P in FIG. A, and FIG. FIG. 2 is a front view of the same. FIG. 3 is a partial front view showing the bearing mechanism of the damper blade. FIG. 4 is a sectional view taken along line S ₁ -S _{1 in} FIG. FIG. 5 is a sectional view taken along line S ₂ -S _{2 in} FIG. FIG. 6 shows FIG. 3 S ₃ −
It is a sectional view according to S ₃ lines. 7 to 9 show a second embodiment of the bearing mechanism of the damper blade, and FIG. 7 is a partial front view similar to FIG. FIG. 8 is a sectional view taken along line S ₄ -S _{4 in} FIG. 7. FIG. 9 shows FIG. 7 S ₅
Is a cross-sectional view taken along -S ₅ lines. FIG. 10 is a schematic diagram showing an outline of a gas-type fixed fire extinguishing facility. 11 and 12 are schematic diagrams of known dampers. FIG. 13 is a schematic view of a known damper equipped with packing. 1 …… Damper blade 2 …… Outer frame 3 …… Edge 4 …… Reinforcement plate

Claims (1)

[Scope of utility model registration request] 1. A gas-type fixed-type fire extinguisher that uses a fire extinguisher such as carbon dioxide or a halide is provided at a ventilation port of a closed compartment so as to suppress a fire inside the fire extinguisher, and the fire extinguishing equipment is automatically activated when the fire extinguisher is started. In a damper configured to close a ventilation opening, an inner frame side of an outer frame of the damper is provided with an edge having the same plane and the same plate thickness, and a plane including the edge has a center of rotation, and A damper blade having the same plate thickness as the edge is provided so that the position when closed is the same plane as the edge, and a gap between the edge and the damper blade in the closed position and between the adjacent damper blades. A damper characterized in that a reinforcing plate for the damper blade is provided so as to cover the.