JP3525127B2 - Drain pipe windshield damper - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a windshield damper for a drain pipe for preventing snow melting water in the drain pipe from freezing due to cold air during the cold season. 2. Description of the Related Art Conventionally, in a snowless roof type building which is widely used in snowy regions in eastern Japan, snowmelt water is drained to a drainage basin or the like using a drain pipe. Therefore, in the cold season, the snowmelt water in the drain pipe may freeze due to the cold air at night, and the snowmelt water may not flow smoothly. For this reason, it is known to provide a drain heater at the lower end of a drain pipe to prevent freezing as disclosed in Japanese Utility Model Laid-Open No. 58-76670. However, there is no problem when the drain pipe is a straight pipe, but when the drainage basin is far away, it flows down at right angles by an elbow pipe.
As shown in the figure, even if a drain heater a is provided at the tip, a large amount of cool air flows in, so that water droplets staying in the linear portion and the elbow portion b freeze and become ice c and increase, and the drain pipe d
There was a problem closing up. [0003] Accordingly, the present invention provides an L
An object of the present invention is to provide a drain pipe windshield damper that prevents a large amount of cool air from flowing in a drain pipe provided with a drain heater at a distal end formed in a letter shape and freezing a linear portion and an elbow portion. For this purpose, a windshield damper for a drain pipe according to the present invention comprises a drain pipe having an L-shaped tip provided with a drain heater at a drain basin side of the drain heater. Is provided with a windshield damper that shuts off the inside of the drain heater,
A rotating shaft is provided that crosses a point 1/3 from the upper end of the tube diameter of the drain heater, and the space above the rotating shaft is closed with a windshield,
On the other hand, the windshield is rotated only in the direction of the discharge port by the hinge around the rotation axis, an arc frame having a minute gap between the drain heater is provided, and a windshield cover is provided on the arc frame,
The lower space 2/3 of the rotating shaft is closed. An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a drain pipe 4 is juxtaposed and fixed along an outer wall 2 of a building 1 by a mounting bracket 3, and an upper portion of the drain pipe 4 is connected to a drain outlet 5 of a snow-free roof. Is bent at right angles by an elbow pipe 6 and is positioned above a drainage pit 7 excavated on the ground, and a drain heater 8 is provided at an L-shaped tip of the drain pipe 4. A windshield damper 9 that shuts off the drain heater 8 is provided inside the drain heater 8 on the drainage basin 7 side. As shown in FIG. 2, the drain heater 8 has a structure in which a heating element 12 such as a heater is laid inside a plastic tube 11 whose outside is reinforced by a stainless steel cover 10, and the inside is closed by a stainless tube 13. Consists of Further, as shown in FIG. 3, the windshield damper 9 is provided with a rotary shaft 14 that crosses a point 1/3 from the upper end of the tube diameter of the drain heater 8, and a space above the rotary shaft 14 is provided by a windshield plate 15. Closing, on the other hand, hinge 16
The stainless steel tube 1
An arc frame 17 having a minute gap, for example, a gap of 2 to 3 mm, is provided between the shaft 3 and a windshield cover 18 in which a windshield plate 15 is stretched on the arc frame 17 to close a space 2/3 below the rotary shaft 14. is there. The windshield plate 15 is a metal plate such as stainless steel or a plastic synthetic resin plate. However, a metal wire mesh may be used as long as a mesh (mesh) sized to block a strong wind, or a plastic synthetic resin net may be used. It is good. Next, the operation of the draft shield 9 of the drain pipe 4 of the present invention will be described. As shown in FIG. 4, a socket of the drain heater 8 is connected to an outlet (not shown) provided on the outer wall 2 of the building 1. Insert 19 and drain heater 8
When the heating element 12 is operated, the heat of the heating element 12 is transmitted to the stainless steel tube 13 to warm the air around the drain heater 8, and the heated air gradually rises along the drain pipe 4, Warm the drain pipe 4 so as not to freeze. Even if a large amount of cold air flows at night, since the windshield damper 9 blocks the drain heater 8, a large amount of cold air does not flow, and the arc frame 17 does not flow.
Flows slowly through the minute gaps. Therefore, water droplets staying in the vertical portion and the elbow portion do not freeze due to a large amount of cold air, and the snowmelt water flows smoothly to the discharge port side. [0008] As shown in FIG.
The windshield cover 18 is rotatable only to the discharge port side, so that even if a gust flows from the discharge port side, it is blocked, and even if a large amount of snow-melting water flows into the drain pipe 4, the windshield cover 18 is indicated by an arrow. As shown, it rotates toward the discharge port, so it does not obstruct the flow of snowmelt. According to the present invention, a windshield damper for a drain pipe of the present invention is provided with a rotary shaft that crosses a point 1/3 from the upper end of the tube diameter of the drain heater, and closes a space above the rotary shaft with a windshield. A windshield cover having a minute gap between the stainless steel pipe and a hinged frame, which is rotated only around the rotation axis by a hinge, and provided with a windshield plate on the arcframe, and a space below the rotation axis. Since it blocks 2/3, it is possible to prevent a large amount of cool air from flowing in and freezing the linear portion and the elbow portion.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a drain pipe provided with a windshield damper of the present invention. FIG. 2 is a longitudinal sectional view of the drain heater of the present invention. FIG. 3 is an enlarged front view of a windshield damper of the present invention. FIG. 4 is an enlarged perspective view of a drain pipe provided with a windshield damper of the present invention. FIG. 5 is an operation explanatory view of the windshield damper of the present invention. FIG. 6 is an enlarged perspective view of a conventional drain pipe. [Description of Signs] 1 Building 2 Outer wall 3 Mounting bracket 4 Drain pipe 5 Drain drain port 6 Elbow pipe 7 Drain basin 8 Drain heater 9 Windshield damper 10 Stainless steel cover 11 Plastic pipe 12 Heating element 13 Stainless steel pipe 14 Rotating shaft 15 Windshield 16 Hinge 17 Arc frame 18 Windshield cover 19 Socket

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04D 13/076 F16L 55/00

Claims (1)

(57) [Claim 1] In a drain pipe provided with a drain heater at an end formed in an L-shape, a draft shield for shutting off the inside of the drain heater is provided on a drain basin side of the drain heater. A damper is provided, and the windshield damper is provided with a rotation axis that crosses a point 1/3 from the upper end of the pipe diameter of the drain heater, and closes a space 1/3 above the rotation axis with a windshield plate,
A windshield cover that rotates only in the direction of the discharge port by a hinge around the rotation axis and has a minute gap between the drain heater and the windshield is provided with a windshield plate on which the windshield plate is stretched, and a space below the rotation axis. A windshield damper for a drain pipe, which closes 2/3.