DE7417837U - Shell-like cover for pipes laid underground - Google Patents

Description

BE 16,594

Alexander Schoeller & Co. AG, Volketswil (Switzerland)

Shell-like cover for pipes laid underground.

The present innovation relates to a shell-like cover for pipes laid underground.

Under "lines" in the sense of the following description and claims are electrically insulated strands, electrical twisted wires, electrical cables, water supply and To understand sewage pipes in plastic hoses or pipes and other flexible lines.

The known covers for pipes laid underground have a horseshoe shape that is open at the bottom in cross section. Such a horseshoe shape is quite resistant to static loads, but has the significant disadvantage on that over two thirds of the surface of the cover lie in an area in which a vertical into the ground penetrating object, e.g. a spade, wooden stake or the like. hits at a right or at least almost right angle, so that the latter through the penetrating object

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easily smashed and the line defenseless as a result can be damaged.

The task of the innovation is to create a cover - the one the line underneath grants a much better protection.

This object is achieved in a shell-like cover of the type mentioned at the outset, according to the innovation, in that the shell-like Cover in each cross-section an ogival shape Has profile whose legs lying on both sides of the axis of symmetry each run after a curve in which at each point the angle between a vertical passed through the point and the branch lying on the side of the axis of symmetry the tangent at the point is at most 45.

Through this training, the angle of incidence is over the whole Protected area kept small so that an object penetrating vertically into the ground slides on the cover and can cause no harm. In addition, thanks to their cross-section, the individual covers can be nested inside one another, so that they only require a very small transport space compared to the known constructions and are also stored in a space-saving manner can be.

In the following, the subject of the innovation is explained in more detail with reference to an embodiment shown in the drawing. In the drawing show:

Fig. 1 shows an embodiment of the shell-like cover in Side view, partially sectioned,

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Fig. 2 the top view (left) and the bottom view (right)

to Fig. 1,
m

Fig. 3 is a section along line III - III in Fig. 2,

4 shows a section along line IV - IV in FIGS. 2 and

5 shows a partial cross section through a snap connection, by means of which two adjacent covers are held in position after they overlap.

The embodiment shown in the drawing of the shell-like Cover for pipes laid underground has = as can be clearly seen from FIGS. 3 and 4 - in each cross-section has an ogival profile. Both sides the axis of symmetry S-S (Fig. 3) lying legs of this ogival profile each run near a curve, where at any point P the angle CC between a vertical V-V laid through point P and the branch lying on the side of the axis of symmetry S-S that laid at point P. Tangent T-T does not exceed 45 °. The "angle of incidence" is öC so with this cover always such an acute angle that an object penetrating into the ground in a vertical direction the cover is not destroyed, but rather slides on the surface of its respective leg.

As can be seen in FIG. 1 of the drawing, the cover has an outwardly curved edge 1 at one end and an edge 1 at the other end a flat, outwardly curved bead 2 with an inwardly curved edge 3. With this training it is possible to have two rectified, axially adjacent covers in the area of the

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facing ends to overlap so that they are in

are secured against gaping in the axial direction. \

The cover is preferably made of plastic, which is not only resistant to moisture, but is also sufficient under load is elastic and therefore has a comparatively high breaking strength; also leads in plastics possible mass production :: u very low unit prices.

If the cover is made of plastic, a measure can be taken due to the elasticity of this material, which the previously mentioned axial securing, i.e. the overlap Adjacent covers, guaranteed even if, for example, a local subsidence of the floor occurs. These Measure consists in that on the top of the cover at an axial distance from the outwardly bent edge 1 a downward protruding above, at its outer end with a conical head provided pin 5 and at an axial distance from the inwardly bent Edge 3 an opening 6 are provided. The dimensions of the conical head 4 and the opening 6 are so on top of one another coordinated that with two overlapping covers in the area of the ends facing each other, the conical head 4 of the Pin 5 of one cover is pressed through the opening 6 of the other cover, so that a kind of snap fastener arises.

This closure is shown in Fig. 5 in partial cross-section.

In order to use the straight covers also cables with strongly curved To be able to protect the course effectively, the covers had to be halved in the previously known constructions, whereby

- due to the now missing possibility of overlapping - the half of the cover became unusable.

To avoid this disadvantage, according to the innovation, the cover has an additional one on the outside in its axial center directed, on the side facing the bead 2 with a at least approximately vertical delimiting edge 7 provided flat bead 8, the inside and outside dimensions of which of the bead 2 correspond. This makes it possible, in the case of strongly curved lines, after cutting through the cover along the line X-X (Fig. 1) the vertical boundary edge of the right cover half behind the outwardly protruding To hook edge 9 of the left cover half and thus create an overlap that has a relatively narrow curvature without any parts of the covers becoming unusable.

In the case of covers that are not made of plastic but of a different material, an opening can be used instead of the pin 5 6 as provided at the other end of the cover; after the overlapping of the adjacent ends of two coaxially covers lying one behind the other is then made of elastic plastic through the now aligned openings 6 existing grooved pin inserted, which with the appropriate design, i.e. if the notches are arranged relatively deep, also causes a push-button connection. To achieve narrow curvatures, analogously to the in Fig. 1 with a and b designated points perforations 6 be provided so that after cutting through the cover along the line X-X and after overlapping the adjacent ends thus created, here also by inserting a plastic grooved pin through it a push-button connection could be established through the aligned openings 6.

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To increase the flexural strength of the cover with respect to its longitudinal axis, between each end of the cover and the flat Bead 8 each an outwardly directed further flat bead 10 can be arranged. As can be seen in particular from Figures 1 and 4, 10 transverse stiffeners 11 are provided on the upper inner sides of the stiffening beads, which under vertical load the cover without prior lateral securing by earth material, a lateral deflection of the legs of the cover impede.

For better fixation in the ground, the covers are provided with foot plates 12, which, however, do not extend over the area of the flat beads 2 and 8 extend.

Claims (1)

Expectations 1. Shell-like cover for underground lines, characterized in that it is in each cross section has an ogival profile, the legs of which are located on both sides of the axis of symmetry (S-S) follow a curve? at which at each point (P) the angle (OG) between one passed through the point (p) Vertical (V-V) and the branch on the side of the symmetry axis (S-S) of the tangent at point (P) (T-T) is 45 ° or less. ■■ ♦> 2. Cover according to claim 1, characterized in that they have an outwardly curved edge (1) at the oinen end and an outwardly directed flat bead at the other end (2) with inwardly curved edge (3), such that two rectified, coaxially adjacent covers can be overlapped in the region of the mutually facing ends. 3. Cover according to claim 1 and 2, characterized in that it consists of elastic plastic. 4. Cover according to claims 2 and 3, characterized in that it is on its upper side at an axial distance from the outwardly curved edge (1) has an upwardly projecting, at its outer end with a conical head (4), molded pin (5) and an opening (6) at an axial distance from the inwardly curved edge (3) has, such that in the case of two covers overlapping in the region of the ends facing one another, the conical head (4) of the pin (5) of one cover through the 741783712.117t Il 111 * Q _ break (6) of the other cover in the manner of a snap fastener is pushable. 5. Cover according to one of claims 2 to 4, characterized in that that, in addition to their axial center, they have an additional outward-facing center on the bead (2) facing side with an at least approximately vertical delimiting edge (7) provided with a flat bead (8) has, whose inner and outer dimensions .ngen those of the bead (2) correspond. 6. Cover according to claim 5, characterized in that the bead located next to the axial center of the cover (8) at the top has an opening that corresponds to that opening (6), which is arranged at an axial distance from the inwardly curved edge (3) of the cover. 7. Cover according to claim 2 or 6, characterized in that it is at an axial distance from the upwardly curved Edge (1) and on both sides at a distance from their axial center line (X-X) each has an opening that the Opening (6) at an axial distance of d ^ m inwards curved edge (3) corresponds, and that to secure the overlap of two full or half covers Grooved pin made of elastic plastic is inserted through the aligned openings (6). 8. Cover according to claim 5 or 6, characterized in that it is between each end and the bead (8) next to her axial center each has an outwardly directed, flat bead (10) for stiffening. 741783712.1Z74 9. Cover according to claim 8, characterized in that on the upper inner sides uex Vöi-öLuifuiKfäWülöte (10)
Cross reinforcements (11) are provided. 10. Cover according to claim 5, characterized in that they do not extend beyond the area of the vertical projections of the flat bulges (2) and Π) Foot plates (12) are provided. May 13, 1974
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