JPS62127575A - Flow regulating damper - Google Patents

Abstract

PURPOSE:To prevent leakage by providing a jellylike seal on the surface of a damper holding frame on which a damper blade is brought into contact. CONSTITUTION:In the inside of an airflow passage 1 formed in a duct 2, a damper holding frame 21 is fitted, and on the frame a seal housing frame 22 is fixed to house a jellylike seal 23. A damper blade 32 is fitted to a pivotally supporting shaft 31 on its one end, and is turned making the pivotally supporting shaft as its center of rotation. When closed, the blade 32 is brought closely in contact with the jellylike seal 23 to complete sealing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flow rate regulating damper, and more particularly to a flow rate regulating damper ξ which causes less gas leakage when closed and can be driven with low torque.

Conventional technology for flow rate adjustment has conventionally had a drive shaft attached to the center of the vane to rotate it, which caused a lot of leakage when closed and required a great deal of force to open and close.

That is, the structure of a conventional damper is shown in FIG. , a shaft 8 with R blades 6 and 7 attached to its center, respectively;
In the example shown in FIG. A shaft 8.9 with R blades 6 and 7 attached to the center, respectively.
It is attached so that it rotates in opposite directions as shown by arrows a and b around the center.

The structure of the blade is as shown in Figure 5, for example, the blade 6.
The blade piece 61 has a frame 62, 62 attached to it, but since the shaft 8 is attached to the center, the frame of the frame is cut at the shaft, creating a gap C. The conventional Dunno shown in FIGS.

In addition, in the conventional Dan Ni, the action of air pressure appears to flow smoothly in the diagram, but in reality, due to the action of turbulence, etc.
Air pressure is not applied evenly, requiring a large amount of force to drive. It is also difficult to prevent leakage by placing the bumper blades close to the receiving frame.

Means for Solving the Problems In this invention, a jelly-like seal is attached to the surface of the damper receiving frame where the blades contact, one end of the damper blade is pivoted, and when there are multiple blades in the air flow path. The pivot points are located sequentially on the windward side and the leeward side of the receiving frame.

Embodiment FIG. 1 shows a sectional view of a first embodiment of the present invention, in which a damper receiving frame 21 is attached to an air flow path 1 formed in a duct 2, a seal storage frame 22 is fixed thereto, and a jelly-like Even though the seal 23 is housed, the damper blade 32 is attached at one end to the pivot shaft 31 and rotates about the pivot shaft. When closed, the vanes 32 are in close contact with the jelly-like seal 23, and the seal is complete. The direction of air flow may be either direction as shown by arrow R.

FIG. 2 is a sectional view showing an example in which there are two damper blades.
3 are attached above and below, jelly-like seal storage frames 42 and 44 are fixed to each, and jelly-like seal/I
/23 is included.

The frames 43 and 44 face in the opposite direction to the frames 41 and 42, and as shown in the figure, the jelly-like seal storage frame 42.
44 are oriented in the back-to-back direction and are integrated back-to-back in the center of the air flow path. And damper blade 51.6
1 are each attached at one end by a pivot shaft 52,62. Since the direction of the receiving frame is opposite, the position of this pivot shaft is opposite across the receiving frame. As shown by arrow R, the direction of the wind may be in either direction within the duct, so the position of the damper blades may be either upwind or leeward. Two-dot chain lines 51' and 61' indicate positions where the blades are opened in directions a and b, respectively. The pivots 52 and 62 interlock with each other to open and close the two blades. So, if air is now flowing from the right side, the air pressure will push the vane 51 clockwise, but at the same time it will push the vane 61 counterclockwise, so that force will cancel out. When the airflow comes from the left, the forces acting on the blades are in the opposite direction, but they cancel out in the same way.

Further, the dead weight on the blade 51 is applied to rotate the blade counterclockwise, but the dead weight applied to the blade 61 is K to rotate the blade clockwise, so this is also canceled out.

In this way, the various forces applied to both blades during opening and closing are canceled out, so the blades can be driven with a low torque that overcomes the frictional force.

In addition, when there is no wind pressure, the tip of the blade is pressed against the jelly-like seal, and the blade is centered so that the jelly-like seal is deformed.

By doing so, when closing the Dan-e, one of the two blades will be further pressed against the seal by the wind pressure, and the leakage will be completely eliminated, and the tip of the other blade on the opposite side of the shaft will be bent by the wind pressure. However, since the jelly seal recovers, there will be no leakage within the strain limit range of the jelly seal material. In this way, leakage can be eliminated even when the wind pressure corresponding to the deflection of the blade is applied until the jelly-like seal is restored when Dan A-closes.

Effects Since the present invention has such a structure, the damper blades are in close contact with the damper receiver, and the pivot shaft is at one end, so there is little leakage when closed, and even if there are multiple blades, wind pressure, dead weight, etc. Everything is balanced, and the torque is low enough to overcome the frictional force.
The wings can be opened and closed.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of a da/noso according to the present invention, Fig. 2 shows another embodiment with two blades, and Figs. 3 and 4 show a conventional da/noso.
・An explanatory diagram of the configuration of the blade, and FIG. 5 is an explanatory diagram of the structure of the blade. Explanation of symbols 1... Air flow path, 2... Duct, 3, 4.5...
Damper receiving frame, 6, 7...Blade, 8.9...Shaft, 21
,41゜43...dan/"receiving frame, 22142144・
... Seal storage frame, 23... Jelly-like seal, 51.
61... Dannozo feather, 52.62... Pivot shaft, 3
Figure 1 Figure 2

Claims (1)

[Claims] 1) A damper receiving frame that is in close contact with the inner circumferential wall of the duct and has a wide opening in the center that serves as an air flow path is installed in the duct, and a damper blade is attached to one end of the damper receiving frame in close contact with the damper receiving frame. A flow rate adjusting damper characterized in that a jelly-like seal is attached to the surface of a damper receiving frame that is pivotally supported by the damper blades. 2) A damper receiving frame that is in close contact with the inner circumferential wall of the duct and has multiple wide openings in the center that serve as air flow paths is installed inside the duct, and damper blades are sequentially installed on the windward and leeward sides of the damper receiving frame. A flow rate adjusting damper characterized in that a jelly-like seal is applied to the surface of a damper receiving frame that is pivotally supported at one end and that the damper blades contact.