EP0981674A1

EP0981674A1 - Manhole cover

Info

Publication number: EP0981674A1
Application number: EP98928253A
Authority: EP
Inventors: Karl Kortmann
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-15
Filing date: 1998-05-13
Publication date: 2000-03-01
Anticipated expiration: 2018-05-13
Also published as: PL337005A1; ATE223539T1; EP0981674B1; DE29708650U1; HUP0002933A2; CZ9904037A3; PL189867B1; HU222068B1; HUP0002933A3; ES2182326T3; AU8016798A; DE59805421D1; WO1998051870A1; CZ297447B6

Abstract

The invention relates to a manhole cover for use especially with sewer manholes or such like installed in road surfaces (8). Said cover comprises at least one concrete ring which after installation receives a cover element (5) on an upper supporting rim (6) situated above a through opening (3) surrounded by said supporting rim, and which surrounds an upper area (7) of the manhole shaft element (4). The concrete ring is embodied as a formed body (1) which below the supporting rim (6) has an enlarged through opening (3) in which the manhole shaft element (4) is housed. The formed body (1) has a profiled projecting part (9) at the level of the through opening (3), which part along its outer circumference forms an enlarged support contour (10).

Description

Manhole cover

The invention relates to a manhole cover for sewer manholes or the like, in particular provided in driving surfaces, according to the preamble of claim 1.

Known manhole covers for sewer structures, such as inlet shafts, inspection shafts or the like, provided in particular in driving surfaces, consist of a concrete ring which accommodates a cover part on the inside and which is inserted on the outside in corresponding base layers and / or pavements of the driving surface. High pressure loads caused by vehicle tires or the like can lead to displacements of the concrete ring from its installed position, so that disadvantageous road damage is the result.

The invention is concerned with the problem of creating a manhole cover for sewer manholes or the like provided in particular in driving surfaces, the components of which are supported with long-term stability with little technical effort towards the driving surface and enable a long-term effective seal in the upper region of the manhole part. Starting from a manhole cover according to the preamble of claim 1, the invention solves this problem with the features of the characterizing part of claim 1. With regard to further essential configurations, reference is made to claims 2 to 22.

The manhole cover according to the invention is designed with a shaped body which has expanded support and covering contours compared to known concrete rings in such a way that pressure loads caused by vehicles are absorbed in the region of the sewer manhole and damage caused by vertical and / or horizontal displacements of the components is avoided.

In an expedient embodiment, the upper ring region of the molded body, which extends in the plane of the driving surface, is minimized in such a way that it only offers a small pressure application surface. At the same time, the extended support contour of the molded body on the outer circumference on the bottom is integrated into the roadway structure, so that an annular rim area forming a wide wing is effective and with it both sagging and displacements of the components are avoided and unwanted widening in the upper joint area is largely excluded. In the installed position, the outside support contour of the molded body engages under the pavement, which is the upper surface on the driving surface, for example an asphalt layer or the like , so that additional support is achieved in this endangered wing area _" near the shaft component.

In the area of its passage opening, the molded body is designed with the profile attachment part in such a way that it can be inserted telescopically into the interior of the chess part and thus enables a height-variable plug connection. In this case, respective elastic sealing rings are provided as direct support between the nested regions, so that the components can absorb even slight displacements without overloading in the vertically and horizontally flexible installation position, and the shaft cover has fluid-tight connection areas as a whole.

The molded body can be produced in a largely arbitrary design with an insert part cast into the concrete, for example made of metal, plastic and / or in the form of a rubber body, as a composite casting, so that a quick adaptation to customer-specific different manhole covers is possible with little technical effort. By varying the quality of the cast concrete, different strength requirements can be met in such a way that the extended profile attachment part in the area of the passage opening and the supporting contour of the molded body is adapted to high loads and the components of the manhole cover have a high long-term stability overall.

Further details and advantages of the invention will become apparent from the following description and the drawing, which illustrate other embodiments of a manhole cover according to the invention. The drawing shows:

1 is a cross-sectional view of the molded body according to the invention as a single part in a first embodiment,

Fig. 2 and

3 respective cross-sectional representations similar to FIG. 1 with the molded body spanning a shaft part in the installed position,

4 shows a cross-sectional representation of the molded body in a two-part design with a pipe socket forming the passage opening,

5 shows a cross-sectional view of the molded body in the installed position in a driving surface in a two-part design similar to FIG. 4,

6 to

11 respective cross-sectional representations of the molded body provided as a multi-part assembly in the connecting position with the chess part,

12 is an enlarged sectional view of a connection area of the assembly assembly with a sealing ring, Fig. 13 to

18 respective embodiments of the molded body as a composite casting with different insert parts,

19 to

22 respective one-piece embodiments of the shaped body similar to FIG. 2 in the installed position with an adapter part directed towards the shaft part,

23 is a plan view of the manhole cover according to a section line XXIII - XXIII in FIG. 24 with holding members fixing the tubular part to the shaped body,

24 to

26 shows respective sectional representations of the manhole cover according to a line XXIV-XXIV in FIG. 23,

27 is an enlarged detail view of the connection area of the molded body and the tubular part,

28 shows a cross-sectional illustration similar to FIG. 24 with the manhole cover in the region of a dome manhole with tube part and seal,

FIG. 29 is an enlarged detail view of the connection of the shaped body and the tubular part according to FIG. 28, and Fig. 30 to

33 shows respective sectional representations of seals in the support region of the tubular part on the shaft part, similar to FIG. 29.

1 shows a shaped body, generally designated 1 and provided as an annular concrete part, for a manhole cover 2 illustrated in principle in FIG. 5, the cover part 5 of which closes a passage opening 3 above a manhole part 4 that runs vertically toward a driving surface 8. The cover part 5 is fixed in the molded body 1 via an upper support edge 6 and at the same time the passage opening 3 of the molded body 1 comprises an upper region 7 of the shaft part 4 in the manner of a plug connection.

The molded body 1 according to the invention is provided with a profile attachment part 9 which widens the area of the passage opening 3, and on the outer circumference the molded body 1 has a support contour 10 which is expanded at the bottom (FIG. 1).

In an expedient embodiment, the molded body 1 in the area of the profile attachment part 9 has a tube part 13 which delimits the passage opening 3 on the one hand and on the other hand forms an annular gap 12, with which an installation position which is variable in height in the manner of a telescopic connection (FIG. 2) is achieved when the individual parts are assembled. In the embodiments of the molded body 1 shown in FIGS. 1, 2 and 3 and 13 to 20, the tubular part 13 is made in one piece with the respective molded body 1 and in the further embodiments shown in FIGS. 4 to 13 the pipe part is formed by a pipe socket 13 'forming an individual part with an upper support ring 14 which can be suspended, for example, in the upper region of the passage opening 3 of the molded body 1 on the support edge 6 (FIG. 4).

4 and 5 show a first embodiment of a multi-part design of the molded body 1 forming the manhole cover 2, wherein after its positioning in the installed position the pipe socket 13 'can be inserted as an individual part into the connection position shown and thus the assembly of the manhole cover 2 is simplified overall.

6 to 8 each show further multi-part embodiments of the manhole cover 2, the molded body 1 being connected to the pipe socket 13 'via an intermediate ring 15 which has a Z-shaped cross section and which is adapted via variable dimensions of its support legs 17, 17' to different shaft parts 4. The intermediate ring 15 can be made of metal, e.g. Cast iron, consist or be molded from plastic.

In the embodiment according to FIG. 8, the molded body 1 is divided into a further intermediate ring 16 above its supporting contour 10, so that the manhole cover 2 has four components which, in particular when large manhole covers with small individual weights are installed, enable easy handling. 10 shows a further multi-part embodiment of the shaped body 1, a bottom-side support ring plate 17, which undersides the shaped body 1 on the lower outer edge of the support contour 10. engages and thus enables an advantageous enlargement of the support surface. The pipe socket 13 'is provided in the region of its support ring 14 with an extension 18 which lies directly on the top of the molded body 1. The pipe socket 13 'can be made of concrete or made of metal, such as gray cast iron.

The embodiment of the molded body 1 according to FIG. 9 shows its construction as a composite casting, an insert part E forming an upper cover 20 being cast into a concrete structure 19 such that the molded body 1 has an upper edge protection level with the running surface 8.

The composite casting of the molded body 1 according to FIG. 11 shows a further embodiment of the manhole cover 2, the inner pipe socket 13 'in the supporting position resting on an annular plate 21 connected to a cover part 20' as an insert part E, and this in turn via an outer ring body 22 on the bottom side is supported.

In the embodiment according to FIG. 13, the molded body 1 is shaped similar to FIG. 2, with a cast-in metal ring 20 ″ forming the insert part E as edge protection in the vicinity of the upper support edge 6.

The embodiments of the molded body 1 provided as a composite casting according to FIGS. 14 to 18 show further combinations of insert parts E, in particular formed from metal parts, in the connecting position with the concrete structure. In Fig. 14 that is Insert part E is provided as a semifinished metal product which connects the cover part 20 'via a web part 23 to the tube part 13''. In FIG. 15, the tubular part 13 ″ consists of a semifinished metal product 25 which is cast in one piece with the molded body 1 in the area of a support profile 24 and on the top of this molded body 1 the cover part 20 ′ is also anchored via support profiles 24 ′. 16, the tube part 13 is provided in its lower end region with a stabilizing metal attachment part 25.

The molded body 1 is designed in a practical embodiment as a hollow cylinder body defining a central longitudinal plane M. It is also conceivable to design the circumferential contour of a polygon or to provide a supporting contour 10 'in an asymmetrical shape (M ¹ ; FIG. 15), which extends only over a partial area of the circumferential contour.

The two embodiments according to FIGS. 17 and 18 show a largely shortened tube part 13 similar to FIG. 1, wherein the respective molded bodies 1 have insert parts E, which above the respective support contour 10 toward the top of the molded body 2 with different anchoring means 27 have metal cover parts 28 are provided.

19 to 22 show the molded body 1, each with an essentially identical cross-sectional contour, the molded body 1 shown in different support heights H, H 'illustrating the telescopic effect of the tubular parts 13 during installation. Between the shaft part 4 (Fig. 21) a respective adapter part 4 ′ designed as a reducer for the shaft diameter D is provided, which seals the respective sealing areas 32 ″ and 33 ′. 19 and 20 can be provided in the form of a shaft cone.

In an advantageous embodiment of the molded body 1 or the respective additional components 15, 16, 22, 4 ', these assembly components are provided in their connection regions formed in the installed position with support parts 31 (FIG. 3) which act as sealing rings 30 and which are made, for example, of rubber or Metal exist and can also be molded into the cast concrete in the manner of the composite casting. In addition, the tube part 13 or the pipe socket 13 ', 13' 'are provided in an advantageous embodiment on the outer surface facing the annular gap 12 with a first sealing ring part 32 which cooperates with a second sealing ring part 33 provided on the inside of the support contour 10 so that the Annular gap 12 is closed in a fluid-tight manner both towards the passage opening 3 against a liquid outlet and towards the surroundings against a liquid inlet.

The design of the pipe lugs 13 and 13 'enables centering of the molded body 1 in its installed position and, at the same time, component tolerances of chess part 4 and / or molded body 12 can be compensated for in the region of the annular gap 12 in such a way that a secure sealing of the parts is achieved. On its inside directed towards the passage opening 3, the support lug 10 has a bevel S, so that even in the event of extreme displacements and / or inclined positions of the shaped body 1 sharp-edged system with notch effect on the shaft part 4 avoided and its damage is largely excluded.

The rubber sealing ring 30 is illustrated in an enlarged detail in FIG. 12, the associated wall 34 having a ring shoulder 35, so that its pressure effect on the sealing ring 30 causes a fluid-tight, annular contact of the components.

5 illustrates the supporting effect of the support contour 10 in the area of a support shoulder 37, which can absorb pressure forces acting on the driving surface 8 (arrow F) via an intermediate layer 38 in such a way that road damage is avoided.

23 to 33 illustrate the multi-part design of the manhole cover in a further embodiment, a tube part 113 or 113 '(FIG. 28), which has different depths T, T' (similar to FIG . 21, 22) can engage in the shaft part 104, 104 '(FIGS. 25, 26). With this socket connection, the installation position of the manhole cover 1 can be adapted to the height of the usable area in the area of the adjacent, already produced driving surface 8 with little effort and with simplified installation.

The pipe part 113 is provided with an upper-side support ring surface 114 which, in a preassembled position of the components, with the Shaped body 1 can be permanently connected via an adhesive connection K (Fig. 25). 24, 26 to 29, in a second embodiment, a plurality of screw connections 115 are provided as a releasable connection of the components, wherein respective rails 116 (FIG. 23) having a U-profile have a threaded sleeve over their legs 117, 118 narrowing downward in the opening slot 119 (Fig. 27) longitudinally displaceable in the longitudinal direction of the rail 116. The bracing of the components is produced by means of screws 120 penetrating an elongated hole 121 in the support ring surface 114. The screw connection can be made in the area of an elongated hole 121, in the area of which a precisely fitting rotation of the components is possible during assembly.

The U-shaped rails 116 are expediently cast into the molded body 1 during its manufacture (FIG. 27) and a fluid-tight connection of the molded body 1 to the tube part 113 is produced via a sealing ring 122 inserted before the screw connection. This connection construction enables, for example also by a horizontal displacement of the parts, an adaptation of the molded body 1 to the laying plane of the paving 8. In a suitable embodiment, the pipe part 113, 113 'consists of glass fiber reinforced plastic (GRP) into which the connection openings, for example the slots 121, are assigned Passage openings for the screws 120 are already formed during manufacture. The shaft part 104 can also be designed as a plastic tube made of HD-PE. The shaft cover is thus with sufficient stability in the area of the plug connection of the pipe part 113, 113 'and the shaft part 104,104 'can be manufactured with less weight in a cheaper version.

The exemplary embodiment according to FIGS. 28 to 33 shows a shaft part 10 'which is provided as a dome shaft above a tank 123 and consists of a metal tube. It is also conceivable to provide such a construction of the shaft construction in the case of an electrical shaft, a pump shaft, a distribution shaft or the like. The tube part 113 'is provided in the area of its outer circumferential surface with a profile 124 in which a sealing ring 125 is fixed in such a way that its lip part 126 has a vertical insertion (arrow E, FIG. 28) of the tube part 113' into the shaft part 104 ' forms a fluid-tight connection. 30 to 33 show respective cutout representations of several embodiments of the profiling 124, to which the sealing ring 125 is fixed in each case. In the area of this seal connection, an anchor part 127 is also provided on the outside of the shaft part 104 ', by means of which an additional support for the shaft part 104' to the surrounding cover layer is formed.

The molded body 1 with the adjacent pipe part 113, 113 'is so supported to the surrounding soil layer 130 or respective layers of lean concrete 131, gravel 132, split 133 and / or sand 134 that the compressive forces (F) are absorbed therein. The layers of the bottom layer 130 can advantageously be compressed up to its upper edge region when the shaft part 104, 104 'is installed, so that after the tube part 113, 113' has been pushed in, this connection is free from pressure loads.

Claims

Expectations

1. Manhole cover for sewer shafts or the like provided in particular in driving surfaces (8), consisting of at least one concrete ring which, in the installed position on an upper support edge (6) above a passage opening (3) surrounded by the support edge, receives a cover part (5) and one comprises the upper region (7) of the shaft part (4), characterized. that the concrete ring is designed as a shaped body (1) which has an enlarged passage opening (3) below the supporting edge (6) and receives the shaft part (4) therein, and that the shaped body (1) at the height of the passage opening (3) is provided with a profile attachment part (9) which forms an expanded support contour (10) on the outer circumference.

2. Manhole cover according to claim 1, characterized in that the shaped body (1) is designed as a composite casting, in the concrete structure of which at least one insert part (E) made of metal, plastic, rubber or the like is integrated.

3. manhole cover according to claim 1 or 2, characterized in that the shaped body (1) in multi-part Ausfü- tion (13 ', 16) and / or with respective additional components (15) forms an assembly unit.

4. Manhole cover according to one of claims 1 to 3, characterized in that the shaped body (1) in the region of the profile attachment part (9) with a one hand delimiting the passage opening (3) and on the other hand an annular gap (12) forming tube part (13) is provided .

5. Manhole cover according to claim 4, characterized in that the tubular part (13) is integrally formed with the shaped body (1).

6. manhole cover according to claim 4 or 5, characterized in that the tubular part (13) with a conically widening inner wall and a cylindrical outer surface forms the passage opening (3).

7. Manhole cover according to one of claims 1 to 6, characterized in that the shaped body (1) in the region of the profile attachment part (9) is provided with at least one sealing part.

8. Manhole cover according to one of claims 1 to 7, characterized in that the molded body (1) in the region of its annular gap (12) from the tubular part (13) projecting sealing ring (32) and / or one on the inside of the support contour

(10) provided sealing ring (33), such that the shaft part (4) is fluid-tight.

9. Manhole cover according to one of claims 1 to 8, characterized in that an individual part is provided as a pipe part, which can be suspended from a pipe socket (13 ') with an upper support ring (14) in the upper region of the passage opening (3) of the shaped body (1). is formed.

10. Manhole cover according to claim 9, characterized in that the pipe socket (13 ') is supported via an intermediate ring (15) provided as a Z-shaped individual part on the upper support edge (6) of the shaped body (1).

11. Manhole cover according to one of claims 1 to 10, characterized in that the shaped body (1) is provided in the region of its upper side facing the driving surface with at least one protective edge (20, 20 ', 20' ') formed by the insert part (E) .

12. Manhole cover according to one of claims 1 to 11, characterized in that the shaped body (1) in the region of its upper support edge (6) has a support part (31) effective as a sealing ring (30).

13. Manhole cover according to one of claims 1 to 12, characterized in that on the inner wall of the pipe part (13) or the pipe socket (13 ') one or more steps (38) and / or a support part (38') for a dirt trap or the like are provided.

14. Manhole cover according to one of claims 1 to 13, characterized in that the molded body (1) provided in the assembly assembly is provided with a sealing ring (31) in all supporting connection areas to parts of the assembly.

15. Manhole cover according to one of claims 1 to 14, characterized in that the shaped body (1) in the region of its outer support contour (10) forms a support shoulder (37) directed towards the driving surface (8).

16. Manhole cover according to one of claims 1 to 15, characterized in that the shaped body (1) in the region of its support contour (10) has an annular gap (12) widening bevel (S).

17. Manhole cover according to one of claims 1 to 16, characterized in that the shaped body (1) rests in the installed position with its support contour (10) on the bottom on an annular body (17).

18. Manhole cover according to one of claims 1 to 17, characterized in that the insert parts (E) provided in the molded body (1) form a stiffener in the manner of a concrete reinforcement.

19. Manhole cover according to one of claims 1 to 18, characterized in that the shaped body (1) has an annular or polygonal peripheral contour.

20. Manhole cover according to one of claims 1 to 19, characterized in that the shaped body (1) has a supporting contour (10 ') extending over a partial region of the peripheral contour.

21. Manhole cover according to one of claims 1 to 20, characterized in that the shaped body (1) via an adapter part (4 ') with the manhole part (4) is connected in height and / or variable in diameter.

22. Manhole cover according to one of claims 1 to 21, characterized in that the molded part (1) associated pipe part (113; 113 ') consists of metal and / or plastic and this on the molded body (1) via an adhesive connection (K) and / or a screw connection (115) can be fixed.