RU2485262C2 - Device to remove icing along perimetre of building roof - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: device comprises pipelines arranged above roof eaves and connected with a heating system via a heat exchanger and a circulating pump, filled with a low-freezing liquid, having an expansion tank and fixed on a bracket, equipped with a drive, as capable of their lowering below the roof eave.

EFFECT: mechanised removal of icicles and ice crust along perimetre of a building roof and prevention of avalanche-like snow descent from a roof.

5 cl, 4 dwg

Description

The invention relates to the field of construction, in particular to devices for removing icicles and ice from the roof of a building.

A device for removing snow and ice from the eaves of the roof [1], including two threads of the heating cable, the first of which is fixed at the edge of the roof, and the second is higher than the first on the outer surface of the roof, and a power source, while the edge of the roof is curved down with the formation of a cavity, the cross-sectional shape of which corresponds to the cross-sectional shape of the heating cable, the first cable thread is placed in this cavity and is in contact with its surface, and the second cable thread is fixed to the outer turn NOSTA roof by a metal protective housing, said yarn heating cable made with at least two insulated conductors electrically connected and connected to a power source, with a joint or separate operation. The described construction cannot guarantee electrical and fire safety, as even slight damage to the insulation of heating cables laid on the wet surface of the roof can lead to breakdown and short circuit. In addition, on buildings of the old construction, often located along the central streets of large cities, a serious alteration of the roof will be required, which is associated with a large investment of time and money.

The closest analogue of the claimed invention is a device for removing icicles along the perimeter of the roof of a building [2] using pipelines and heating systems passing near the roof overhangs, the pipelines being located in the path of melt water, connected to the heating system through a heat exchanger and a circulation pump, filled with low-freezing liquid and have an expansion tank.

Similar features of the present invention with the description of a known device are: pipelines passing near the roof overhangs, connected to the heating system through a heat exchanger and a circulation pump, filled with a low-freezing liquid and having an expansion tank. A significant drawback of the known design, narrowing its functionality, is the inability to remove ice, creating a traumatic situation for the population in the winter. Removing ice due to manual labor is inefficient and costly.

The objective of the invention is to expand the functionality of the device. The technical result achieved in this case lies in the possibility of mechanized removal of both icicles and ice on the perimeter of the roof of the building. The specified technical result is achieved by the fact that in the known device for removing icicles around the perimeter of the roof of the building using pipelines passing near the roof overhangs, connected to the heating system through a heat exchanger and a circulation pump, filled with a low-freezing liquid and having an expansion tank, the pipelines are located above the roof overhangs at a suspension equipped with a drive with the possibility of lowering them below the roof overhangs.

The set of features indicated in the independent claim, includes all the features, each of which is necessary, and all together are sufficient to obtain a technical result.

Structurally, pipelines consist of separate sections. Neighboring sections can have a common drive.

Figure 1 shows the proposed device for one section of pipelines, a plan view. Figure 2 shows the structural diagram of the device. Figure 3 shows the design of the pipeline with the supply of low-freezing fluid through the axis of the suspension arms. Figure 4 (a, b) shows a section aa (figure 1) in two positions: a) the device is in the initial state and (dashed) after the suspension drive has been triggered; b) the device after removing the ice and icicles.

The device consists (Fig. 1) of a pipeline 1, mounted near the overhang of the roof 2 on a bracket 3 with a drive 4 and an expansion tank 5, as well as on the intermediate brackets 6. Pipeline 1 (Fig. 2) consists of an outer pipe divided into the right and the left sections are flanges 7 with a gasket 8, and connecting the sections and the coaxially located inner pipe 9. When tightening the flanges 7, the gasket 8 compresses the inner pipe 9, separating the sections of the outer pipe, each of which is connected with hollow levers 10, supported on the bracket 3 and, through repeated connections with seals 11 connected to the hot pipe 12 or the return pipe 13.

An additional support for the pipeline 1 is provided by levers 14 and brackets 6. The pipeline 1 is connected to the heating system 15 through the heat exchanger 16 and the circulation pump 17, is filled with low-freezing fluid and has an expansion tank 18. The actuator 4 acts on the pipeline through the lever 19. Additionally, the device has: a return valve 20, control unit 21, air 22, drain 23 and topping-up 24 cranes.

The air valve 22 can be eliminated if the return pipe 13 is connected to the expansion tank 18 through a nozzle restricting the flow of low-freezing liquid between the pipelines 12 and 13.

Figure 3 shows in more detail the design of the pipeline 1 with the inlet and outlet of low-freezing fluid (see arrows) through the axis 25, the sleeve 26 with the sealing rings 27, the tees 28, as well as the nipple 29 of the adjusting bolt 30 with the sleeve 31. The cavity of the levers 10 are divided flanges 32 and gasket 33.

The adjusting bolt 30 through the sleeve 31 and the bracket 3 presses the sleeve 26 to the seals 27.

The operation of the device is illustrated in figure 4. In the initial position a) pipeline 1 with the help of levers 10, 19 and drive 4 is raised above the overhang of the roof 2, the circulation pump 17 is turned off, there is no heat loss. It should be noted that the natural circulation of low-freezing fluid at the same time prevents the check valve 20.

When icicles 34 and a canopy of ice 35 appear, the operator turns on the actuator 4, which lowers the pipeline 1 until the ice 35 touches the ice and then rotates the lever 19 with an emphasis m to the position indicated by the dotted line. The coaxial arrangement of the outer pipe of the pipeline 1 and the inner pipe 9 with the movement of the low-freezing fluid in opposite directions helps to equalize the heating temperature along the pipeline. It is desirable to cover the hot 12, return 13 pipelines and heat exchanger 16 with thermal insulation, and make the outer pipe 1 and levers 10 and 14 from square pipes.

In position b), when the circulation pump 17 is turned on, the heat exchanger 16 heats the low-freezing liquid, which heats the pipe 1. The heated pipe is lowered under its own weight, thawing ice 35 and then icicles 34, after which drive 4 returns the device to its original state position. Given the large thermal power of the heating system (10 kW and above), the device’s turn-on time will not exceed 10-20 minutes The use of a low-freezing fluid (e.g. antifreeze) prevents the defrosting of a switched off device. An additional technical result is that the pipeline 3 performs the function of a parapet and prevents the avalanche-like collapse of snow from the roof.

With the location of the actuator 4 with the edge of the pipeline 1, the latter acts as a torsion, twisting under the influence of its own weight and creating a slope necessary to remove air.

Information sources

1. RF patent No. 2392398, Cl. E04D 13/076 with priority of 04/28/2009.

2. Mayak No. 2011107765/03 (010986) dated 02.28.2011.

Claims (5)

1. Device for removing icing along the perimeter of the roof of the building using pipelines passing near the roof overhangs, connected to the heating system through a heat exchanger and circulation pump, filled with low-freezing liquid and having an expansion tank, characterized in that the pipelines are located above the roof overhangs on a suspension equipped with drive, with the possibility of lowering them below the roof overhangs. 2. The device according to claim 1, characterized in that the check valve is connected in series with the circulation pump. 3. The device according to claim 1, characterized in that the pressure and return pipelines are placed coaxially. 4. The device according to claim 1, characterized in that the suspension is made in the form of levers based on brackets mounted on the roof. 5. The device according to claim 4, characterized in that the supply and removal of low-freezing fluid to the pipelines is carried out through the axis of the levers.

Images