FI82110C - culvert - Google Patents

Description

1 82110

culverts

The invention relates to a road drum having two or more drum tubes, at least one drum tube of which is fixed inside the second drum tube, and the suction opening of the inserted drum tube is higher than the main suction opening of the other suction tubes of the road drum.

Previously known road drums usually have only one suction opening. Even there are usually only one outlet. The most significant disadvantage of the known road drums is that they very often freeze in cold conditions either in autumn or at the latest in spring. Freezing of the road drum results in a flood on the road, which can only be removed by melting the road drum with steam, for example. Defrosting is cumbersome and expensive. SU Patent Publication No. 836271 discloses a road drum comprising two drum tubes, one of which is housed within the other. Both ends of the inserted drum tube are arranged to extend above the road surface and are secured in this position by means of fastening means. In the spring of 20 during high water, the ends of the plastic pipes are straightened, the plugs are removed or the ends of the plastic pipes are cut open. The end on the high water side is pressed under the water and water can flow along the pipe through the road drum. Such a structure will be installed in the fall and removed by Wed-25 when the road drum has melted, so a lot of labor is required to install, commission and remove it and the condition of the road drums should be constantly monitored.

The object of the invention is to eliminate the above-mentioned drawbacks associated with previously known road drums.

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

2,82110

According to the invention, the suction opening of the drum pipe located inside the second drum pipe of the road drum is always in place in a position below the road surface and a shield is formed at the end of the drum pipe to prevent rainwater and contaminants from entering the drum pipe. When the ditch and the road drum freeze in cold conditions, only the drum pipes that form the main suction opening are closed. The drum pipe with a suction opening higher than the suction openings of the other drum pipes is generally open, allowing the water flooding the ditch to flow into the outlet ditch through this drum pipe before the water has time to rise to the road.

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 seen from the side and partly in cross-section.

In the embodiment according to the figure, the road drum is formed of two drum tubes, of which the drum tube 2 with a smaller diameter is located inside the drum tube 1 with a larger diameter. The suction opening 3 of the smaller drum pipe is higher than the suction opening 4 of the larger drum pipe, but ·: 25 is still below the road surface 5. The outlet 6 of the smaller drum tube is higher in this application than the outlet 7 of the larger drum tube. The location of the outlet may vary in different applications. Dashed line 8 shows the location of the outlet at a conventional level.

In this application, the ends of the smaller drum tube are cam-like 9 to prevent rainwater and contaminants from entering the drum tube. In different applications, the protection can also be handled in other known ways, such as hats or the like.

: with devices.

'35

If or when ice 10 forms in the road drum in cold conditions, the ice only closes the larger diameter drum.

II

3 82110 pipe. The smaller diameter drum pipe remains open, allowing water flooding the ditch to flow into the drainage ditch through the smaller drum pipe before it has time to get on the road.

5

Water must not be left in the smaller diameter drum tube in the autumn. Removing water from a smaller pipe may also be important in the spring, when shelter and frost weather vary. There is no problem of dewatering when the polsLo opening of a smaller diameter drum tube is at or below the level of the tube itself. In such a solution, the defrosting of the outlet can be ensured by placing a drum pipe with a smaller diameter at the top of the road drum. In the U-shaped drum tube 15, the draining must be carried out either by a manually operated or automatically operated draining valve or the like. The valve solution is not shown in the drawing.

The freezing problem of the smaller diameter drum tube 20 of the road drum 20 according to the embodiment shown in the drawing can be eliminated by thermally insulating the tube. The ErisLe thickness depends on where the smaller drum tube is located. In some applications, thermal insulation is not required.

In other embodiments of the invention, the road drum may be formed of more than two drum tubes, and in some applications, the drum tubes are not nested but side by side, and in some applications even at a short distance from each other.

30

A road drum according to the invention is obtained from an ordinary road drum by placing an additional drum tube inside or possibly outside it, e.g. as shown in the drawing. The invention naturally also relates to such a solution.

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

Claims (5)

A road drum having two or more drum tubes (1, 2), of which at least one drum tube (2) is fixed inside the second drum tube (I) and the suction opening (3) of the drum tube (2) placed inside is higher than the other drum tubes (2). main suction opening (4) formed by the suction openings of the suction pipes (1), characterized in that the suction opening (3) of the drum pipe (2) placed inside the second drum pipe (1) is always installed in a position below the road surface (5) and the drum pipe (2) ) is provided with a cover (9) arranged to prevent rainwater and contaminants from entering the drum pipe (2), but which does not prevent water in the ditch from entering the drum pipe (2). Road drum according to Claim 1, characterized in that the cover (9) is an arcuate, preferably cam-like end of the drum tube. Road drum according to Claim 1 or 2, characterized in that at least one of the drum tubes 20 (2), the suction openings (3) of which are higher than the main suction opening (4), the outlet opening (6) is higher than the main outlet opening (7). Road drum according to one of Claims 1 to 3, characterized in that at least one of the drum tubes (2) with suction openings higher than the main suction opening (4) is arranged at the top of the road drum. Road drum according to one of Claims 1 to 4, characterized in that at least one of the drum tubes (2), the suction openings of which are higher than the main suction opening (4), is thermally insulated. 5,82110