FI95306B - Device for preventing freezing - Google Patents

Abstract

The invention relates to a device in a rainwater drain that tightly seals the drain 1. The device is suspended from the drain cover 2 and comprises, in particular, two plate-shaped parts 5, 6 articulated to one another, which by means of a weight element 9 are forced into a position in which they seal the drain 1 tightly. <IMAGE>

Description

This invention relates to an antifreeze device, and more particularly to a device used to prevent the freezing of wells, especially rainwater wells, and thus to ensure that surface water can flow in wells and associated drains for as long as possible in autumn and as early as possible in spring and elsewhere. .

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Vertical wells embedded in the ground are used for various purposes. Thus, there are wells into which no material is led from the outside, for example, various inspection wells. If necessary, these can be easily insulated, for example with a disc-shaped insulation board. On the other hand, there are wells-15 and, especially rainwater wells, to which, for example, surface water from streets is discharged. The intention is that the well will be able to transport surface water away whenever surface water is usually moving. The problem with this is that when the temperature is on the frost side, the waters tend to freeze in the sewers and wells, and again when sheltered weather comes and surface water should be transported away, the sewers are frozen.

The problem seems to be especially that the one on the frost side. the air tends to circulate in the sewer network and in this way cool the network and freeze the water passing through it. Namely, the sewer network dug relatively deep in the 25 countries would most likely remain melted if the cooling effect of the circulating air could be eliminated.

"Attempts have been made to solve the problem in a couple of ways. 2 95306 However, for example, the water flowing from the street is always accompanied by debris and the widest variety of materials, even in large chunks.The valve clogs [of these quickly. ”Another factor that makes the valve solution 5 completely unsuitable is that the water that leaking, freezing or choking on the valve will automatically cause the valve to clog.

Another known solution is presented in Finnish patent application 854507. It is based on the apparently erroneous notion that a thermal insulation layer must be provided in the vertical well in order to prevent freezing phenomena. In the application, this is solved by tracing two overlapping conical rubber flanges "shoemaker's lamp shade" suspended from the well cover on the vertical part of the well, and it is stated that the air space between the flanges acts as a thermal insulator. material, as their edge areas have to be deformed to open the way to run-off water, there is a tendency to deform permanently, with the result that the edge portions are no longer close to the well walls, and air flows can cool the well and drains around almost unhindered. The result is freezing.

A third known solution is disclosed in Finnish patent 80927, which uses a thermal insulation layer, which is a center-folding model, to substantially close a well. This layer of insulation is hung in the well on top of the holders in the wall of the well. The disadvantage of the solution is that all such material accumulates on the device, both water and debris, which drips from there from above. The water on top of the insulation naturally freezes, and the device is in no way intended to take care of the removal of the accumulated material.

The object of the present invention is to provide an antifreeze device which makes it possible to avoid the above-mentioned disadvantages of the prior art 3 95306. Thus, the device according to the invention has a simple structure. It works without problems even in conditions where freezing and chamfering occur. The device according to the invention maintains its tight properties continuously and does not change its shape and thus deteriorates its sealing properties.

The above and other advantages and advantages of the device according to the invention are provided by a device, the characteristic features of which are set out in the appended claims.

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The invention will now be described in more detail with reference to the accompanying drawings, which are shown for illustrative purposes and in no way limiting a preferred embodiment of the device according to the invention.

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Figure 1 illustrates in vertical section a preferred embodiment of a device according to the invention mounted in a vertical well,

Fig. 2 shows the solution according to Fig. 1 seen directly upwards without a manhole cover.

Figure 1 thus shows a part of a vertical well embedded in the ground, in particular a rainwater well 1, which is usually a pipe with a circular cross-section. Connected to the lower end of the well 1 is a sewer pipe with a suitable pour 25, which carries the water forward. This section is not shown. The well 1 is generally provided with a lid 2, which is usually a cast iron grate lid.

For hanging the device according to the invention, a suitable hook 3 or similar means is provided on the cover 2, which enables the device to be hung. The suspension itself uses wire-like parts, which are indicated in the figures by reference numeral 4.

4 95306 In this particular embodiment, the device according to the invention consists of a two-part structure, which parts are articulated to each other so that the angle between them can change. Thus, the device consists of plate-like parts 5, 6 which are articulated to each other along the line 7.

5 In this case, the hanging wires 4 are fastened in four places to the plate parts 5 and 6, as best seen in Figure 2. These fastening points are denoted by the number 8. A four-point fastening achieves a very stable hanging, but other fastening forms are suitable for self-centering use. .

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Essentially at the hinge line 7, a weight 9 is attached to the plate parts 5 and 6 in this embodiment, which depends on the wire-like fastening means 10.

15 The operation of the device described here is as follows. The device assembled in the shape described above is suspended from the well cover 2. The weight 9 is chosen so as to be sufficient to counteract the tendency of the plate-shaped wings 5 and 6 to sag to hang vertically. Namely, a lever arm is formed in the device between the joint 7 and the attachment point 8, and by means of this lever arm and weight 9 the "wings" 5 and 6 are always lifted upwards from their edge parts as far as they can go. suitably against the walls of the well.The shape of the vanes is suitably chosen so that the seal is perfect, in this case the shape is slightly elliptical.

Water flows into the well through the gratings of the cover 2. Water accumulates on the wings 5 and 6 in their lower parts, i.e. in the area immediately adjacent to the wall of the well. In practical experiments, it has been observed that a moderate layer of water accumulates on the vanes, whereupon the gravity they cause opens the structure, i.e. presses the vanes down, causing the water to "drip" into the drain and the vanes 5 and 6 to rise to their tight upper position again.

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The device built according to the invention also has no difficulty in coping with a situation in which the water layer accumulated on the wings can freeze, because again when the temperature rises, the device drops the ice into the sewer.

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Since the device according to the invention very effectively shuts off all air flow from the sewer, the natural geothermal heat of the relatively deeply excavated sewer keeps the sewer molten. This same heat also helps to keep the device according to the invention in working order, since the heating effect is applied to it from below.

There are numerous alternatives to the practical applications of the invention. Thus, the same solution can be used by using vanes which form a completely circular disc with an outer diameter exactly equal to the inner diameter of the drain. The difference from the solution described above is then that the wings 5 and 6 shown in Fig. 1 form a flat horizontal disc. The stopping of the vanes must therefore be ensured by a suitable stop, because in this embodiment the edges of the drain do not form an obstacle against the movement of the vanes 20. The stop is easy to arrange at the joint point 7.

According to the basic idea of the invention, the above-mentioned flat surface forming device can also be formed so that there are two articulation lines and they are perpendicular to each other. In this case, the water is discharged along the 25 articulation lines which are easier to give up in each case.

It is possible to arrange the wing-lifting force in other ways as well. than using a weight of 9. For example, it is possible to use different • · spring devices. With the spring devices, the turning of the vanes to their upper position 30 can be ensured by arranging a spring 11 fixed to the lower surfaces of the vanes to push the vanes apart and towards the upper position.

Another possibility is to provide a spring device which, when attached to the upper surfaces of the vanes, pulls the vanes 5 and 6 towards the upper position.

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Since the device according to the invention is, as already mentioned above, of the type itself concentrating in the sewer, it is possible to arrange the suspension with, for example, only one wire 4. In this case, the fastening must of course be carried out so that the device is substantially in balance.

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The natural material of the device according to the invention is a flexible plastic material or a rubber material or a combination of the above. The materials must, of course, be relatively durable and otherwise suitable for the purpose. Material choices and thicknesses, etc.

However, aspects of the invention can always be solved on a case-by-case basis. The most typical manufacturing material is a smooth plate, but, for example, a plate material shaped in a certain way may give a better result in certain situations, for example in terms of ice release. The edge-planar sheet material is easiest to shape so that sealing to the edge of the well takes place using simple cutting lines. Likewise, from the point of view of sealing, at least the edge parts are made of a flexible material, such as rubber.

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Claims (6)

7 95306 Antifreeze device for use, in particular, in vertical wells immersed in the ground, such as rainwater wells (1), comprising a closing part consisting of plate-shaped parts (5, 6) 5 folded along at least one articulation line (7) and hanging means closing the closing part the device has means (9, 10, 11) for forcing the parts (5, 6) into a closed, substantially tight position against the walls of the well (1). Device according to claim 1, characterized in that the closing part consists of two substantially semicircular and articulated parts (5, 6) and means for forcing the parts (5, 6) into a substantially planar, well-closing position. Device according to claim 1, characterized in that the closing part consists of two semi-elliptical parts (5, 6) articulated to each other and means for forcing the parts into an inverted wide V-shaped position to seal the well. Device according to one of the preceding claims, characterized in that the means for forcing the device into the closing position consist of a printing means (9) suspended from the lower surface of the device substantially at its articulation line (7). Device according to one of the preceding claims, characterized in that the means for forcing the device into the closed position consists of a pulling or pushing spring means (11) fastened to the parts (5, 6). Device according to one of the preceding claims, characterized in that the suspension means (4) are fastened to the parts (5, 6) at at least two, in particular four, points (8), the points (8) being intended to act as support points for the printing means (9). , parts (5, 6) for closing lever operation. 8 95306