JP4964158B2 - Fire protection damper device - Google Patents

Description

  The present invention relates to a fireproof damper device disposed to close an air conditioning duct when a fire occurs.

  Conventional fire damper devices generally have a structure in which blades for opening and closing a flow path are rotatably supported in a main casing through a shaft (see, for example, Patent Document 1). In such a fireproof damper, a pad channel having a bush is provided at both ends of the shaft, and blades fixed to the shaft are rotatably supported. The pad channel is fixed inside the main casing by a toggle or the like.

Japanese Utility Model Publication No. 62-152150

  In the conventional fire damper device, since the cross-sectional shape of the pad channel in a virtual plane orthogonal to the blade shaft is a hat shape, the fixed surface to the inner periphery of the main body casing is arranged in two rows in parallel with the end portion of the shaft in between. And it was hitting a toggle on this side. However, since there are two rows of fixed surfaces and the number of times the toggle is stamped, assembly and labor are required.

  Also, because the shaft end is completely hidden in the pad channel, it is difficult to perform maintenance when dust in the fluid flowing inside the air conditioning duct adheres, and the adhered dust adheres and malfunctions. May occur. Furthermore, if the blade connecting member is installed in a state where it is exposed in the main body casing, dust or the like adheres, causing sticking or malfunction.

  The problem to be solved by the present invention is to provide a fire-proof damper device that is excellent in maintainability and can avoid sticking of moving parts and poor opening / closing operation due to adhesion of dust or the like.

  A fire damper apparatus according to the present invention includes a cylindrical main body casing that forms a flow path therein, and a plurality of blades that are rotatably disposed in the main body casing via a shaft to open and close the flow path. A pad channel provided on the inner periphery of the main body casing for supporting both ends of the shaft, and an opening facing the end of the shaft is provided in at least a part of the pad channel. Features.

  With such a configuration, it becomes possible to easily visually check the end of the shaft from the opening formed in at least a part of the pad channel, so that the maintainability is improved and the dust is attached. It is possible to avoid the sticking of the movable part and the opening / closing operation failure. The opening is preferably provided on the leeward side with respect to the fluid passing through the main body casing.

  Here, the cross-sectional shape of the pat channel in a virtual plane orthogonal to the shaft is substantially W-shaped, and only one side edge of the pat channel located at both ends of the substantially W-shape is on the inner periphery of the main body casing. It is desirable to fix the other side edge of the pad channel as a stopper when the blade is closed.

  With such a configuration, an opening facing the end of the shaft is formed along one side edge of the pad channel, and there is no need to separately provide a blade stopper, thereby reducing the number of parts. The structure can be simplified. Further, since only one side edge of the pad channel needs to be fixed to the inner periphery of the main body casing, the mounting process is reduced by half, and the assembly becomes easy. Further, since the gap between the end of the blade and the main casing can be reduced, the airtightness when the blade is fully closed is improved, and the function as a fireproof damper device is also improved.

  On the other hand, the vane connecting member is provided in the vicinity of the end of the shaft, and a retreat area for disposing the connecting member in the vicinity of the inner periphery of the main body casing is provided between the inner periphery of the main body casing and the downstream side of the pad channel. It can also be provided. With such a configuration, since the connecting member of the blade is located in the retreat area in the vicinity of the inner periphery of the main body casing, away from the central portion of the flow path through which the fluid passes, the connecting member is disposed on the downstream side of the pad channel. Since it is in a hidden and protected state, it is possible to prevent sticking of the movable part and poor opening / closing operation due to the atmosphere of the fluid moving through the flow path, and the reliability as a fireproof damper is further improved.

  According to the present invention, it is possible to provide a fire-proof damper device that is excellent in maintainability and can avoid sticking of a movable part and open / close operation failure due to adhesion of dust or the like.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a front view showing a fire damper apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the fire damper apparatus shown in FIG. 1, and FIG. 3 is a rear view of the fire damper apparatus shown in FIG. 4 is a plan view of the fire damper apparatus shown in FIG. 1, FIG. 5 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 6 is a cross-sectional view taken along line BB in FIG. 7 is a perspective view showing the pad channel, FIG. 8 (a) is a view seen from the direction of arrow C in FIG. 7, and FIG. 8 (b) is a cross-sectional view taken along the line DD in FIG. FIG.

  As shown in FIGS. 1 to 6, a fire damper device 10 according to this embodiment includes a rectangular cylindrical main body casing 12 that forms a flow path 11 therein, and a main body casing 12 that opens and closes the flow path 11. A plurality of blades 14 rotatably disposed via the shaft 13 and a pad channel 15 provided on the inner peripheral surface 12a of the main body casing 12 for supporting both end portions 13a of the shaft 13 are provided. . Further, as shown in FIGS. 7 and 8, the cross-sectional shape of the pad channel 15 in a virtual plane (not shown) orthogonal to the shaft 13 is substantially W-shaped, and the pad channel 15 positioned at both ends of the substantially W-shaped. Only one side edge 15a of the main body casing 12 is fixed to the inner peripheral surface 12a.

  As shown in FIGS. 7 and 8, the pad channel 15 is formed by bending a metal plate, and the end portion of the shaft 13 is disposed on the holding portion 15 b disposed in parallel with the inner peripheral surface 12 a of the main body casing 12. A plurality of shaft holes 15e through which 13a can be penetrated are formed, and bushes 15d for rotatably supporting the shaft 13 are mounted in the respective shaft holes 15e. Further, the other side edge portion 15c erected in the direction parallel to the shaft 13 from the holding portion 15b of the pad channel 15 serves as a stopper when the blade 14 is closed.

  Since the pad channel 15 having a substantially W-shaped cross-section has high rigidity, attaching it to the inner peripheral surface 12 a of the main body casing 12 also serves to reinforce the main body casing 12. The pad channel 15 of the present embodiment is formed of an iron plate made of the same material as that of the main casing 12 and the blades 14, but is not limited thereto, and may be formed using other metal plates such as a stainless steel plate.

  Further, a connecting member 17 for interlocking the plurality of blades 14 is provided near one end of the shaft 13, and the connecting member 17 is disposed between the inner peripheral surface 12 a of the main body casing 12 and the downstream side of the pad channel 15. Is provided in the vicinity of the inner peripheral surface 12a of the main casing 12. During normal operation, the blade 14 is urged in the closing direction by the urging means 16 and is kept open by a temperature fuse 19 disposed in the flow path 11.

  Here, based on FIG.6 and FIG.9 ~ FIG. 11, the closing operation | movement of the damper apparatus 10 for fire prevention is demonstrated. FIG. 9 is a vertical sectional view showing a state in which the blades are being closed, FIG. 10 is a vertical sectional view showing a state in which the blades are closed, and FIG. 11 is a horizontal sectional view showing a state in which the blades are closed.

  As shown in FIG. 6, the fire damper device 10 is normally held such that the plurality of blades 14 are parallel to the flow path 11. When a high-temperature fluid flows into the flow path 11 due to the occurrence of a fire, the thermal fuse 19 is melted and the restraint of the blade 14 is released, so that the blade 14 is moved by the biasing force of the biasing means 16 as shown in FIG. Then, after automatically rotating around the shaft 13, the flow path 11 is closed as shown in FIGS. Thereby, since it can block | prevent that the high temperature fluid upstream from the blade | wing 14 flows into the downstream of the fire damper apparatus 10, the outstanding fire prevention function is exhibited.

  In the fire damper device 10, only the side edge portion 15 a of the pad channel 15 is fixed to the inner peripheral surface 12 a of the main body casing 12, so that it is opened toward the downstream side of the blade 14 along the holding portion 15 b. An opening 15f is formed. The opening 15f is formed so that the end of the shaft 13 faces. Therefore, both end portions 13a of the shaft 13 located in the pad channel 15 can be easily visually confirmed from the opening portion 15f, and the maintainability is excellent. For this reason, it is possible to avoid sticking of the movable part and defective opening / closing operation due to adhesion of dust or the like around the shaft. Further, since only one side edge 15a of the pad channel 15 needs to be fixed to the inner peripheral surface 12a of the main body casing 12, the attaching process of the pad channel 15 is halved compared to the conventional case, and the assembly is facilitated.

  Further, the other side edge 15c of the pad channel 15 functions as a stopper when the blade 14 is closed, so that it is not necessary to separately provide a stopper for the blade 14 inside the main body casing 12. For this reason, the number of parts can be reduced as compared with the prior art, and the structure can be simplified. Moreover, since the clearance gap between the edge part of the blade | wing 14 and the main body casing 12 can be reduced, the airtightness when the blade | wing 14 is fully closed improves, and the function as a fireproof damper improves.

  Further, the connecting member 17 of the blade 14 is provided near the end 13 a of the shaft 13, and the connecting member 17 is disposed between the inner peripheral surface 12 a of the main body casing 12 and the downstream side of the pad channel 15. A refuge area 18 is provided for placement in the vicinity of 12a. As described above, the connecting member 17 of the blade 14 is positioned in the retreat area in the vicinity of the inner peripheral surface 12a of the main body casing 12 away from the central portion of the flow path 11 through which the fluid passes. It is in a state of being hidden and protected on the downstream side. For this reason, it is possible to avoid the sticking of the movable part and the opening / closing operation failure of the blades 14 due to the atmosphere of the fluid moving in the flow path 11, and the reliability as a fireproof damper is further improved.

  The fireproof damper device of the present invention can be widely used by being attached to an air conditioning duct installed in various buildings.

It is a front view which shows the damper apparatus for fire prevention which is embodiment of this invention. It is a side view of the damper apparatus for fire prevention shown in FIG. It is a rear view of the fire damper apparatus shown in FIG. It is a top view of the damper apparatus for fire prevention shown in FIG. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is a perspective view which shows a put channel. (A) is the figure seen from the arrow C direction in FIG. 7, (b) is the figure seen from the arrow D direction in FIG. It is a vertical sectional view showing a state in the middle of closing a blade. It is a vertical sectional view showing a state where the blade is closed. It is a horizontal sectional view which shows the state which the blade | wing closed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fire damper apparatus 11 Flow path 12 Main body casing 12a Inner peripheral surface 13 Shaft 13a End 14 Blade 15 Put channel 15a, 15c Side edge 15b Holding part 15d Bush 15e Shaft hole 16 Energizing means 17 Connecting member 18 Escape area 19 Thermal fuse

Claims (3)

  A cylindrical main body casing that forms a flow path therein, a plurality of blades that are rotatably disposed in the main body casing via a shaft to open and close the flow path, and both ends of the shaft are pivotally supported. And a pad channel provided on the inner periphery of the main body casing, and an opening facing the end of the shaft is provided in at least a part of the pad channel.   The cross-sectional shape of the pat channel in a virtual plane orthogonal to the shaft is substantially W-shaped, and only one side edge of the pat channel located at both ends of the substantially W-shape is fixed to the inner periphery of the main body casing, The fireproof damper device according to claim 1, wherein the other side edge portion of the pad channel is used as a stopper when the blade is closed.   The connecting member of the blade is provided near the end of the shaft, and a retreat area is provided between the inner periphery of the main body casing and the downstream side of the pad channel to place the connecting member in the vicinity of the inner periphery of the main body casing. The fire-resistant damper device according to claim 1 or 2, wherein

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