SU1747633A1 - Internal drain box - Google Patents

Description

The invention relates to construction and can be used to organize and improve drainage efficiency in winter from roofs with internal drainage in buildings located in areas with stable snow cover.

The purpose of the invention is to increase the efficiency of operation and maintainability of the funnel of the internal drain.

From FIG. 1 shows the funnel of the internal drain, the cut; Fig, 2-node; in fig. 3 is a top view of an electric heating hood funnel; FIG. 4 is a section A-A in FIG. 3; in fig. 5 is the same as in FIG. 3, bottom view; in fig. 6 electric circuit of the electric heating funnel; in fig. 5 is a fragment of the roof plan showing the outside temperature sensor. ;:

The funnel for an internal drain has a cap 1, a water holding clamping nozzle 2 with fastening pins 3, a drainage nozzle 4, an electrical heating element. At the place of installation of the funnel in the layer

The sleeve 6 is installed. The electric heating element 5 consists of an annular part 7 and a connection box 8. On the outer surface of the element there are two concentrically arranged grooves 9, in the bottom of each of which, near the connection box 8, a metal point contact 1.0 is pressed. From the bottom end of each contact 10 recessed into the element, an electrical conductor is laid in the element body (for example, a piece of copper wire) 11. Together, these grooves 9 with contacts 10 form a meltwater sensor (DW). In the body of the ring 7, an electro-coil or several turns of the heating wire (e.g., nichrome) 12 is pressed in. The driver is provided with end leads 13 in the connection box 8. The connection box 8 is connected to the sleeve / pipe 15 for cable passage through the threaded connection 14 17 through roof structures to electrospray 9

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WITH

with

dividing the building, protecting the cable from mechanical damage and water ingress. An outdoor temperature sensor (DT) 16 is installed on a structure projecting higher than the roof (for example, on a radio tube or teleantenna pipe rack) 18 and a two-wire cable passed through the inside of the pipe rack is supplied to

to the electrical distribution device of the building and through the distribution box in series with the melt water sensor and the electric heater 5,

The device works as follows.

With simultaneous operation of the melt water temperature sensor, the power supply of the heating element 5 (two) and the outside air temperature sensor (16) turn on. The contacts of the meltwater sensor (LW) close the power supply circuit and the power supply of the heating element (5) turns on after both grooves 9 are filled with melt water and water trickles appear between them - jumpers that are current conductors. The response temperature sensor (usually it is in the range of 2

-10 ° C) at which the temperature forms on the surface of the peripheral part of the funnel is equal to the freezing point of water (O

).

The effectiveness of the proposed invention is due to the presence of an integral part of the electric heating element, a meltwater sensor, which automatically eliminates the electrical heating of the funnel in the absence of an ice source (melt water) and, as a result, reduces energy costs. Making the electric heating element from a heat-resistant non-conductive material makes it possible to increase electrical safety. Open access to the electric element of the funnel increases its maintainability. Form l, and from gain

Claims (2)

1. A funnel for internal drainage, including a cap, a water inlet clamping nozzle and an annular electric heating element, characterized in that, in order to improve the operating conditions, the electric heating element is made with two concentrically located on the outer surface grooves with a point metal contact in their bottoms electrically connected to the electrical connection box of the electric heating element, which covers the lateral facet of the intake pressure nipple. 2. A funnel according to claim 1, characterized in that the electric heating element is made of heat-resistant, conductive material with an electric coil or an electric heating twisted wire placed inside it with a terminal in the connection box. ff Fig1 FIG $ FIG. 6 I am 2 Fivl 5 Fig 7