JP3026255B2 - Fire protection damper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire damper device for automatically closing an inside / outside ventilation passage formed by an inside / outside double pipe in a fire or the like.

[0002]

2. Description of the Related Art There has been known a damper device for opening and shutting off a damper body by moving an auxiliary cylinder through an inner / outer ventilation passage composed of inner and outer cylinders (Japanese Utility Model Publication No. 6-1710). Currently, the damper device 53 that closes the inner tube 2 by separately separating the inner and outer tubes 1 and 2 and attaching damper devices 51 and 52 thereto (FIG. 16) or closing the outer tube 1 is used. It is frequently used (FIG. 17).

[0003]

In the above-mentioned known invention, the auxiliary cylinder is an essential requirement, and the number of parts is increased and the structure is complicated in that the damper body is opened by the movement of the auxiliary cylinder. There was a problem of communication near the device. That is, in the above-mentioned known example, the inside and outside ventilation passages composed of the double cylinder of the inner cylinder and the outer cylinder could not be shut off independently.

[0004]

However, the present invention has solved the above-mentioned conventional problems because the inside and outside ventilation passages comprising the inner pipe and the outer pipe can be blocked by independent damper blades.

Namely this invention, the inner pipe is inserted with a predetermined gap to the outer tube, to form the air passage in and out, in the damper device so as to automatically close the inside and outside of the air passage, the outer tube part interposed the Benkushige of square cross section, and the outer air passage between the valve Napishtim- and the inner tube, betrayer air generated by the inner tube in the valve Napishtim
Insert a rotary damper blade that closes at right angles to the ventilation direction of the road
Then, the output of the heat sensing means rotates the rotary damper blade.
This is a fire damper device characterized in that the fire damper device is configured to be turned off to simultaneously block the inside and outside ventilation passages . The output of the heat-sensitive means to the next, by dissolution of a fuse due to ventilation of the heat, which unlock the rotary accumulating imparted to the rotation axis of the damper blade, or, the rotation of the damper blade due to the deformation of the shape memory alloy Unlock the rotational energy storage applied to the shaft, or
There is one for rotating the rotary shaft by utilizing the deforming force of the shape memory alloy.

In the present invention, the input of the damper blade is
It can be obtained by actuation of a spring by melting of a fuse or deformation of a shape memory alloy, but it is preferable, and it is preferable to shut off the inner and outer passages at the same time.

In the present invention, the melting of the fuse or the deformation of the shape memory alloy is caused by a rise in the temperature of one or both of the inside and outside ventilation passages.

The damper device according to the present invention blocks the inside and outside ventilation passages almost simultaneously and independently of each other, and the inside and outside ventilation passages are independent, and there is no possibility that one ventilation passage communicates with the other.

The damper device of the present invention is formed so that it can be interposed at an appropriate position in the inner and outer double pipes, and can be designed to have dimensions that conform to the specifications (dimensions) of the inner and outer double pipes. There is no fear that the ventilation of the damper device causes stagnation or other inconvenience in the ventilation.

The output of the damper device according to the present invention is:
Since a conventionally used and reliable fuse blowing or deformation of a shape memory alloy is used, there is no risk of failure and the reliability of operation is extremely high. In addition, since a spring or a link mechanism is employed, even after being installed for a long time, it operates in the same manner as a new one. For example, even if metal fatigue, rusting, adhesion of moisture, and other external conditions change, malfunction does not occur.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention detects the inside and outside ventilation passage formed by an inside and outside double tube by the heat of ventilation (melting of a fuse or deformation of a shape memory alloy), and the rotation of the damper blade shaft is output by the output. Is released, and the inside and outside ventilation passages are cut off by the rotation of the damper blades.

[0012] The blocking is achieved by releasing the rotation lock of the rotating shaft of the damper blade or turning the damper blade by the output of the shape memory alloy to block the internal and external ventilation passages.

[0013]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. The inner tube 2 is inserted with a predetermined gap inside the outer tube 1 to form a double tube 5 having inner and outer ventilation passages 3 and 4. A valve casing 7 having a rectangular cross section is interposed in a double pipe near the double pipe 5 penetrating the outer wall 6 of the building, and a damper blade 8 is rotated by a shaft 9 in an inner pipe 2 a in the valve casing 7. The semi-doughnut-shaped damper blades 10, 10a are connected to the inner tube 2a in the valve housing 7 and the ventilation passage 4a formed by the outer tube 1a of the valve housing 7 by the shafts 11, 11a of the damper blades 10, 10a. 9 is installed parallel to and openable (damper blade 1
0, 10a are normally open).

The shaft 9 and one end of the shafts 11 and 11a are linked to each other by protruding pieces 12, 12a, 13 and 13a and connecting pieces 14 and 14a (FIG. 3). The other end of the shaft 9
The lever 16 protrudes outward, the base of the lever 16 is fixed to the protruding portion, a hook 16 a is provided at the tip of the lever 16, and a handle 16 b is continuously provided at the rear end of the lever 16.
One end of a lock rod 17 is hooked on 6a (shown by a chain line in FIG. 1).

The lock rod 17 is inserted into a guide tube 18, and the lock rod 17 is always inserted into the guide tube 18.
8, a spring 19 urged to be drawn into the interior of the lock rod 17, and a tip projection 17a of a connecting rod 17b of the lock rod 17 are provided.
Is hooked on the other end hole 20a of the fuse 20 having one end fixed to the guide tube 18. The fuse 20 is exposed to the inside and outside ventilation passages (FIG. 2).

In the above-described embodiment, the damper blades 8, 10, and 10a are held open in a normal ventilation state (shown by chain lines in FIG. 4). Next, when the ventilation temperature of the ventilation passage becomes 90 ° C. or higher due to a fire or other accident, the fuse 20 is melted, so that the force for engaging the lock rod 17 disappears.
It moves in the direction of the middle arrow 21 and the hook 16 of the lever 16 is moved.
The lock rod 17 comes off from the position a (FIG. 1). So lever 1
6 rotates 90 degrees in the direction of the arrow 23 by the urging of the spring 22 in the cylindrical body 15 attached to the shaft 9, and the damper blade 8 shuts off the internal ventilation passage 3 a of the inner pipe 2 a. On the other hand, the rotation of the shaft 9 of the damper blade 8 (arrow 23) is performed via the link connection, as shown by arrows 24 and 24a.
Is rotated 90 degrees (FIG. 3), so that the damper blade 10,
10a also rotates 90 degrees and shuts off the outside ventilation passage 4a in the valve housing 7. As described above, by blowing the fuse 20, the inside and outside ventilation passages 3a and 4a can be completely shut off.

According to the above-described embodiment, even if the temperature of the ventilation in either the inner ventilation passage 3a or the outer ventilation passage 4a rises, the fuse 20 is blown and the inner and outer ventilation passages 3a, 4a
Is shut off, the outer pipe 1a and the inner pipe 2a for shutting off the damper blades 8, 10, and 10a are also independent in the valve housing 7, and the inner and outer ventilation passages 3a and 4a are also independent. There is no danger of exhaust gas or the like passing through the outer pipe 1a and the inner pipe 2a being mixed in the casing 7, or of one flowing back to the other.

In the above-described embodiment, the rotation lock of the shaft 9 of the damper blade 8 is released by the blowing of the fuse 20. However, as shown in FIG. Of the connecting rod 17b of the lock rod 17 by the deformation of
When the locking piece 25 is released from the locking hole 26, the locking rod 1 is released.
7 is moved in the direction of arrow 27 by a spring 19, and the damper blades 8, 10, 10a can be rotated by the simultaneous operation of the fuse 20 and the fusing. The shape of the locking piece 25 is an example, and there is no limitation on the unlocking structure.

[0019]

Embodiment 2 Another embodiment of the present invention is shown in FIGS.
1 will be described.

A valve casing 30 is interposed in the double pipe 5 near the penetrating outer wall 6 of the double pipe 5 composed of the outer pipe 1 and the inner pipe 2, and the inner pipe in the outer pipe 1a of the valve casing 30 is provided. A shaft 33 of a damper blade 32 for shutting off the inner ventilation passage 31 is rotatably installed in the inner ventilation passage 2a, and a semi-doughnut-shaped (planar) (Shape) damper blades 35, 35a are slidably mounted toward the center of the inner pipe 2a from a direction perpendicular to the center axis of the inner pipe 2a (perpendicular to the outer ventilation path). The damper blades 35, 35
a can be moved linearly with the casings 36 and 36a as guides, and one side of the casings 36 and 36a
It is airtightly fixed to the wall of No. 0.

Guide pieces 38, 38a are fixed to the damper blades 35, 35a, and the guide pieces 38, 38a are
It is slidably guided by guide rods 37, 37a parallel to the sliding direction of the damper blades 35, 35a, and is always urged toward the inner tube 2a by springs 39, 39a. When the damper blades 35, 35a are open, the guide pieces 38, 38a have lock pins 40,
A damper blade 35, 35a is prevented from sliding by springs 39, 39a.

The lock pins 40, 40a are connected to disks 41, 41a fixed to the shaft 33 of the damper blade 32 by wires 42, 42a.

The shaft 33 of the damper blade 32 is urged by a spring 43 so as to rotate 90 degrees, and a hook 44 a of a lever 44 fixed to the shaft 33.
Is engaged with one end of the lock rod 45. Further, the lock rod 45 is engaged with the other end of the fuse 47 having one end fixed to the guide rod 46, and the spring 4 in the guide tube 46.
8, it is constantly urged in the direction of releasing the latch (arrow 54) (FIGS. 12 and 13).

In the above-described embodiment, when the fuse 47 is melted due to the heating ventilation in the inner ventilation passage 31 or the outer ventilation passage 34, one end of the lock rod 45 is disengaged from the hook 44a of the lever 44, and the shaft of the damper blade 32 is rotated. 33 rotates 90 degrees due to the accumulated power of the spring 43 and closes the inner ventilation path 31 by the damper blade 32. When the shaft 33 rotates, the shaft 33
The discs 41, 41a fixed to are rotated, and via the wires 42, 42a attached to target positions on the outer peripheral portion of the disc 41,
The lock pins 40, 40a move in the directions of the arrows 49, 49a to unlock the guide pieces 38, 38a. Therefore, the damper blades 35 and 35a are
Slide in the directions of arrows 50, 50a by 9, 39a,
The outside ventilation path 34 is shut off.

As described above, the blowing of the fuse 47 can automatically cut off the inside and outside ventilation passages 31, 34.

[0026]

According to the damper device of the present invention , the valve casing is interposed in the double pipe composed of the inner pipe and the outer pipe, and the inner and outer ventilation passages are independently provided in the valve casing, and the inner and outer ventilation passages are simultaneously formed at substantially the same position. There is an effect that can be cut off. Therefore, the internal and external ventilation paths were communicated due to the interruption .
Therefore, there is an effect that there is no possibility that both ventilations are mixed or one gas flows backward to the other.

According to the present invention, there is provided a damper blade installed in an inside / outside ventilation passage by blowing a fuse or deforming a shape memory alloy.
Thus, since the ventilation path can be automatically shut off, there are various effects such that the apparatus can operate accurately even if the apparatus is installed for a long period of time and there is no possibility of causing a failure. In addition, since the valve housing is made rectangular, there is an effect that the outside ventilation passage can be easily shut off.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a sectional view with a part thereof omitted.

FIG. 5 is an explanatory view of the rotation of the damper blade.

FIG. 6 is an explanatory view showing the operation of the fuse.

FIG. 7 is an explanatory view showing an example of the shape memory alloy.

FIG. 8 is an explanatory view of a semi-donut-shaped damper blade.

FIG. 9 is a front view of another embodiment.

FIG. 10 is a side view of the same.

FIG. 11 is a sectional view of the same.

FIG. 12 is an explanatory view of the rotation of the damper blade.

FIG. 13 is an explanatory view showing the operation of the fuse.

FIG. 14 is a plan view showing the movement of the lock pin.

FIG. 15 is an explanatory view of the same front view.

FIG. 16 is an explanatory view of a conventional example.

FIG. 17 is an explanatory view of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Outer pipe 2, 2a Inner pipe 3, 3a Inner ventilation path 4, 4a Outer ventilation path 5 Double pipe 6 Outer wall 7 Valve housing 8, 10, 10a Damper blade 9, 11, 11a Shaft 12, 12a, 13, 13a Projecting piece 14, 14a Connecting piece 15 Cylindrical body 16 Lever 17 Locking rod 18 Guide tube 19, 22 Spring 20 Fuse 21, 23, 24, 24a Arrow 25 Locking piece made of shape memory alloy 26 Locking hole 28 Screw 30 Valve housing 31 Inner air passage 32 Damper blade 33 Shaft 34 Outer air passage 35, 35a Damper blade 36, 36a Cover box 37, 37a Guide rod 38, 38a Guide piece 39, 39a Spring 40, 40a Lock pin 41, 41a Disk 42 , 42a Wire 43, 48 Spring 44 Lever 45 Locking rod 46 Guide tube 47 Fuse

Claims (3)

(57) [Claims] 1. A The inner tube is inserted with a predetermined gap to the outer tube, to form the air passage in and out, in the damper device so as to automatically close the internal and external air passage, a portion of the outer tube A valve housing having a rectangular cross section is interposed, and the outer ventilation path between the valve housing and the inner pipe and the ventilation direction of the inner ventilation path formed by the inner pipe in the valve housing.
Insert the rotary damper blade that closes at a right angle, and rotate the rotary damper blade according to the output of the heat-sensitive means.
A fire damper device configured to simultaneously shut off an air passage . The output of wherein the heat-sensitive means, by dissolution of a fuse due to ventilation of the heat, fire dampers device according to claim 1, wherein characterized in that unlocking the rotation accumulating imparted to the rotation axis of the damper blade. 3. The output of the heat-sensitive means releases the lock of the rotational storage force applied to the rotating shaft of the damper blade due to the deformation of the shape memory alloy, or rotates the rotating shaft using the deformation force of the shape memory alloy. The fire prevention damper device according to claim 1, wherein: