FI83555C - culvert - Google Patents

Description

1 83555

culverts

The invention relates to a road drum comprising a pipe extending from one side of the road to the other.

5 Road drums are used to direct water from one side of the road to the other. In cold conditions, the problem is the freezing of water in the road drum, whereby the frozen water fills the pipe and prevents the water from flowing. Today, frost insulation is placed between the road drum pipe 10 and the road and the purpose is to insulate the pipe and prevent the water flowing in it from freezing. Despite the frost insulation, the road drum is cold in cold conditions, freezing the water flowing in it, which freezes from the bottom until the pipe is completely blocked.

15

The object of the invention is to provide a road drum in which the flowing water does not easily freeze. It is a further object of the invention to provide a road drum which is simple in construction and inexpensive to manufacture.

: 20

The object of the invention is achieved by a road drum, which is mainly characterized by what is stated in the claims.

In the road drum according to the invention, a layer of insulating material is placed on the inner surface of the pipe. In this case, the water flowing in the pipe does not come into direct contact with the material of the pipe and does not freeze as easily as in previous road drums.

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The insulating material is placed on the inner surface of the pipe along its entire length and preferably on the entire inner surface of the pipe. In this case, the cold transferred from the surrounding ground to the pipe cannot greatly affect the water flowing in the insulating layer. The insulating layer is made of a suitable insulating material known per se, which can be placed on the inner surface of the pipe and which is at least to some extent resistant to the flow of water 5.

The invention will now be explained in more detail with reference to the accompanying drawing, which shows an application of a road drum according to the invention placed under the road and in cross-section.

The figure shows the road 1, under which a road drum is placed in its transverse direction, which includes a pipe 2 extending from one side of the road to the other side thereof. The pipe is made of concrete or other material suitable for the purpose. An insulating material layer 3 is placed on the entire inner surface of the pipe at its end. The water flowing through the pipe flows on top of this insulating material layer and does not come into contact with the actual pipe material.

In the application shown in the figure, a layer 4 of insulating material is also placed outside the road 2 of the road drum, which is intended to act as an additional insulating layer. The road drum according to the invention can also be manufactured without such an additional layer of insulating material. In addition, in some embodiments of the invention, a layer of insulating material is not placed on the top surface of the pipe.

The invention is not limited to the preferred embodiments shown, but may vary within the scope of the claims.

Il

Claims (2)

1. A road culvert belonging to a pipe (2) located below the road (1) extending from one side of the road to the other, characterized in that a layer of insulating material has been placed on the inner surface of the pipe (1). 3), above 4 which the water flowing into the tube is arranged to flow. A road culvert according to claim 1, characterized in that the layer of insulating material (3) has been placed on the entire inner surface of the pipe (2) and arranged to extend from one end of the pipe to the other.