JP2000234775A - Two layer exhaust pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent backflow of exhaust gas from an inner pipe, i.e., an exhaust pipe from a toilet, to an outer pipe, i.e., an exhaust pipe from bathtub. SOLUTION: An inner pipe 3 is set in an outer pipe 2 while matching the forward end parts and a thermally expanding fireproof sealing material 5 is provided on the inner face at the forward end of the outer pipe 2 while spaced apart constantly from the outer surface 3a of the inner pipe. An auto-release fireproof damper 9 comprising semicircular twin blades 8 is disposed in the inner pipe 3 wherein the twin blades 8 are superposed in the longitudinal direction of the inner pipe 3 and clamped with a temperature fuse 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer exhaust pipe.

[0002]

2. Description of the Related Art In an apartment house, a double-layer exhaust pipe 11 having two layers of exhaust pipes for a toilet and a bathtub as shown in FIG. 4 is used to save space. This double-layer exhaust pipe 11 is a toilet exhaust pipe 12 that is a bathtub exhaust pipe 13.
A self-opening fire damper 15 comprising two semicircular blades 14 is provided in an exhaust pipe 13 of the bathtub, and the fire damper 15 overlaps in the length direction of the exhaust pipe 12 of the toilet. And is pinched by the thermal fuse 16,
When the thermal fuse 16 is melted by heat, the two blades 14 open to close the opening 17 of the exhaust pipe of the bathtub. For this reason, the exhaust pipe 12 of the toilet has a distal end piped to the rear side of the fireproof damper 15.

[0003]

However, in the above-described two-layer exhaust pipe, the distal end of the exhaust pipe of the toilet is provided behind the fire damper, that is, in the exhaust pipe of the bathtub. There is a problem in that the exhaust air flows backward through the exhaust pipe of the bathtub due to wind or the like, which may cause discomfort to a person using the bathtub.

The present invention has been made in view of such a problem, and an object of the present invention is to exhaust air from an inner pipe which is an exhaust pipe of a toilet so as not to flow backward through an outer pipe which is an exhaust pipe of a bathtub. The purpose is to provide a two-layer tube.

[0005]

According to a first aspect of the present invention, an inner tube is provided in an outer tube so that the distal ends thereof coincide with each other, and the inner surface of the outer tube at the distal end thereof is provided. A heat-sealing seal material that expands due to heat is provided at a predetermined interval between the outer surface of the inner tube and a self-opening fire-damper made up of a semicircular two blades is provided in the inner tube. Are overlapped in the longitudinal direction and sandwiched by thermal fuses.

According to the first aspect of the present invention, since the outer tube and the inner tube have the same distal end, the exhaust from the inner tube is directly discharged to the outside, so that there is no backflow in the outer tube. In addition, the heat of the fire causes the fire-proof seal material to expand and adhere to the outer surface of the inner tube, thereby closing the opening of the outer tube and melting the temperature fuse and automatically opening the semicircular two-bladed blade. Close the opening in the tube.

According to a second aspect of the present invention, the inner pipe is piped into the outer pipe so that the tips thereof coincide with each other, and a large number of blades slide in the opening between the outer pipe and the inner pipe, thereby forming the opening. Is provided, the blades of the slide shutter are overlapped at the upper part of the opening and sandwiched by a temperature fuse, and an automatic opening fireproof damper comprising two semicircular blades is provided in the inner tube, The two blades are overlapped in the length direction of the inner tube and sandwiched by a thermal fuse.

[0008] According to the second aspect of the present invention, since the outer tube and the inner tube coincide with each other, the exhaust from the inner tube is directly discharged to the outside, so that the inside of the outer tube does not flow backward. In addition, the heat of the fire melts the thermal fuse and slides the opening while the blades of the slide shutter are connected to each other.
The opening is closed, and the opening of the inner tube is closed by automatically opening the two semicircular blades.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a two-layer exhaust pipe according to an embodiment of the present invention. FIG. 1 shows a first embodiment, in which (1) is a cross-sectional view of an exhaust double-layer pipe, (2) is a cross-sectional view taken along line AA of (1), and FIG. It is a longitudinal section of a two-layer pipe.

The exhaust double-layer pipe 1 comprises an outer pipe 2 which is an exhaust pipe of a bathtub, and an inner pipe 3 which is an exhaust pipe of a toilet. The openings 4 and 5 are piped to the outer wall 6 so as to communicate with the outside.

On the inner surface of the distal end portion of the outer tube, a fire-proof sealing material 7 is provided so as to have an appropriate thickness, that is, a predetermined distance from the outer surface 3a of the inner tube. The fire-proof sealing material 7 includes:
It expands instantaneously due to heat and flame during a fire, and changes into a strong and heat-insulating carbide.

A fire damper 9 comprising two semicircular blades 8 is provided in the distal end of the inner tube 3 so that the two blades 8 are automatically opened by a spring (not shown). Usually, they are overlapped in the longitudinal direction of the inner tube 3 and are closed by the thermal fuse 10. Therefore, when the thermal fuse 10 is melted by the heat or flame of a fire, the two blades 8 are opened to close the opening 5 of the inner tube.

[0013] As described above, since the inner pipe 3 is piped into the outer pipe 2 so that the end portions thereof coincide with each other, the exhaust air from the toilet is directly discharged to the outside and flows backward in the outer pipe 2. There is no. In addition, when a fire occurs, as shown in FIG. 3, the heat and flame expands the fire-proof seal member 7 and closes the inner tube outer surface 3a to close the opening 4 of the outer tube. The flame melts the thermal fuse 10 to open the two blades 8 and close the opening 5 of the inner tube so that the flame, smoke, toxic gas and the like do not flow out.

Incidentally, the fire-proof seal member 7 is, as described above,
Once expanded, they are all removed and a new fireproof sealant is provided on the inner surface of the outer tube.

FIG. 4 shows a second embodiment, in which a slide shutter 2 is provided at an opening 4 between an inner tube 2 and an outer tube 3.
0 is provided. This slide shutter 20 slides the opening 4 by connecting a large number of fan-shaped blades 21,
The opening 4 is closed. These blades 21 are fitted into slide grooves 22 between the outer peripheral surface of the inner tube 2 and the inner peripheral surface of the inner tube 3, and slide down by their own weight.
Normally, fixed blades 21 fixed above the opening 4
a blade 21 that slides one side (left side in the figure) to the front side of a
Are overlapped and sandwiched by the thermal fuse 23, and the other (right side in the figure) is provided on the rear side of the fixed blade 21a.
Are overlapped and sandwiched by a thermal fuse 23. Therefore, when the thermal fuse 23 is melted by the heat of a fire, a large number of blades 21 slide in the slide grooves 22 by their own weight from before and after the fixed blade 21a to close the opening 4.

[0016]

According to the present invention, since the outer tube and the inner tube have the same tip, the exhaust from the inner tube is directly discharged to the outside and does not flow backward in the outer tube.

The heat of the fire causes the sealing material for fire prevention to expand and adhere to the outer surface of the inner tube, thereby closing the opening of the outer tube and melting the temperature fuse to automatically open the two semicircular blades. To close the opening of the inner tube.

The heat of the disaster melts the thermal fuse and slides the opening while the blades of the slide shutter are connected to each other to close the opening and automatically open the two semicircular blades. Close the opening of the inner tube.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of an exhaust double-layer pipe, and FIG.

FIG. 2 is a longitudinal sectional view of a two-layer exhaust pipe.

FIG. 3 (1) is a cross-sectional view of the exhaust double-layer pipe in which the fire-proof seal material has expanded, and (2) is a front view of (1).

FIG. 4 shows a two-layer exhaust pipe according to a second embodiment, (1) is a front view, (2) is an enlarged sectional view of a main part,
(3) is a cross-sectional view of the slide shutter, (4) is a perspective view,
(5) is a sectional view showing an attached state.

FIG. 5 is a cross-sectional view of a conventional two-layer exhaust pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exhaust two-layer tube 2 Outer tube 3 Inner tube 3a Inner tube outer surface 4 Outer tube opening 5 Inner tube opening 6 Outer wall 7 Fireproof seal material 8 Two blades 9 Fireproof damper 10 Thermal fuse

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiichi Tsunoda 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. Tokyo Branch (72) Inventor Shuichi Tabata 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. Tokyo Branch (72) Inventor Eiji Yamashita 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. Tokyo Branch (72) Inventor Takashi Yatsushiro 1-7-1, Kyobashi, Chuo-ku, Tokyo F-term in the Tokyo branch of Toda Construction Co., Ltd. (reference) 2D037 EA00 3L058 BE04 BE05 BG04

Claims (2)

[Claims] 1. An inner pipe is piped into an outer pipe so that tips thereof coincide with each other, and a fire-proof seal material which expands by heat is provided on the inner face of the outer pipe at a predetermined distance from the outer face of the inner pipe. In the inner pipe, a self-opening fire damper composed of two semicircular blades is provided, and the two blades are overlapped in the length direction of the inner pipe and sandwiched by a thermal fuse, and are used for exhaust. Double-layer pipe. 2. An inner pipe is piped into an outer pipe so that tips thereof coincide with each other, and a number of blades slide in an opening between the outer pipe and the inner pipe, and a slide shutter for closing the opening is provided. The sliding shutter blades are overlapped at the upper part of the opening and sandwiched by a thermal fuse, and a self-opening fireproof damper made up of a semicircular two blades is provided in the inner tube. A two-layer exhaust pipe characterized by being overlapped in the longitudinal direction of the pipe and sandwiched by a thermal fuse.