DK2295655T3

DK2295655T3 - Shaft, in particular, control and purification shaft for wastewater with a flow channel and a plate for the flow channel

Info

Publication number: DK2295655T3
Application number: DK10172187.6T
Authority: DK
Inventors: Hubert Schott
Original assignee: Hegler Plastik Gmbh
Priority date: 2009-08-13
Filing date: 2010-08-06
Publication date: 2017-10-02
Also published as: EP2295655A2; EP2295655B1; DE102009037042A1; EP2295655A3; PL2295655T3

Description

The invention relates to a shaft according to the preamble of claim 1 and to a board according to claim 11.

Shafts of the generic type are for instance known from EP 1 591 712 B1. They have proven well in practical application in particular because of their modular design. Pipes of this type to be used as shaft base bodies are made of plastic material. The pipes are preferably designed as twin-wall pipes produced by extrusion, said twin-wall pipes comprising a smooth cylindrical internal tube and a corrugated external tube. Alternatively, single-wall corrugated pipes produced by extrusion or blowing can be used as well. Between the connectors and the bottom, the pipes to be used as shaft base bodies have a space where sand and the like deposits that is carried over by waste water. Waste water in this respect means any type of water that carries additional substances, in other words rain water, domestic waste water and drainage water. This sand trap is particularly disadvantageous if shafts of this type are used for infrastructure projects in the fields of road and railroad construction because in these fields, shafts of this type are primarily used for inspection and control works. For this purpose, shafts are provided with flow channels interconnecting the connectors.

Thus it is known from EP 1 939 369 A1 to insert a base element into a shaft according to the preamble of claim 1, wherein said base element may be configured in such a way as to interconnect connectors arranged diametrically opposite to each other as well as - if configured accordingly - connectors that are not arranged diametrically opposite to each other. Said base element has a complex shape and is producible only using extremely elaborate injection moulds.

From DE 85 06 249 U1 it is known to arrange, in a control shaft, an upwardly open half pipe in the manner of a trough, said half pipe serving as flow channel and interconnecting the connectors for waste water pipes arranged at mutually opposite sides. The space above said flow channel is partly covered by boards. The space at the sides and below the trough-shaped half pipe is open so it is possible for any type of substance to deposit there.

It is the object of the invention to provide a flow channel for a shaft of the generic type that can be inserted easily when required.

For the shaft of the generic type, this object is achieved according to the invention by the features in the characterizing part of claim 1. The rigid but flexible board is inserted into the pipe forming the shaft from below in such a way that said board is bent upwards in the regions transverse to the connectors so as to form a channel that interconnects the two connectors and allows waste water to flow through in an unimpeded manner without the risk of solids depositing in the space below the connectors, making it possible for inspection cameras to pass through the shaft. A full face-to-face contact of the peripheral edge of the board with the circular cylindrical pipe of the shaft is made possible by its elliptical design. The board is not perfectly elliptical because it is bent.

The embodiment according to claims 2 to 4 ensures a simple and reliable fixing of the board in its mounted position bent such as to form a flow channel.

Claim 5 reflects particularly advantageous dimensionings of a board forming a flow channel.

Claims 6 and 7 reflect the basic shapes, known per se, of the shaft.

Claims 8 and 9 reflect the material of the shaft and of the board forming the flow channel.

Further details, features and advantages of the invention will be apparent from the ensuing description of an exemplary embodiment, taken in conjunction with the drawing in which

Figure 1 shows a vertical exterior view of a shaft according to the invention;

Figure 2 shows a partly broken open view of the lower region of the shaft without a flow channel inserted therein;

Figure 3 shows a view, according to Figure 2, of the shaft with a flow channel inserted therein;

Figure 4 shows a partly broken open view of the shaft according to Figure 3 rotated about the central longitudinal axis through 90°;

Figure 5 shows a plan view of the board forming the flow channel; and

Figure 6 shows a greatly enlarged view, compared to Figure 3, of a section of Figure 3.

As can be seen from Figure 1, a shaft 1, which is usually used as control and rinsing shaft, is produced from a pipe 2 serving as shaft base body and from a pipe 3 serving as elongation. Both pipes 2, 3 are corrugated twin-wall pipes produced from a smooth internal tube 4 and a corrugated external tube 5. Alternatively, corrugated pipes can be used the shape of which corresponds only to that of the corrugated external tube 5. The upper pipe 3 has a socket 6 by means of which the connection with the lower pipe 2 is formed. Details concerning the production of these pipes 2, 3 with and without a socket being formed thereon can be found in EP 0 563 575 B1 to which reference is made. The upper pipe 3 is closed by means of a removable lid 7. Said removable lid 7 rests on a support ring 8 enclosing the upper end of the pipe 3; when the shaft 1 is buried in the ground, said support ring 8 rests on an annular support 9 made of concrete, for example. The lower pipe 2 is closed at its lower side by means of a bottom 10.

Slightly above the bottom 10, flat connection faces 11 are formed that are produced from the external tube 5, in other words the internal tube 4 is configured as a substantially smooth cylindrical tube even within the connection faces 11.

If it is desired to connect an inlet pipe 12 and an outlet pipe 13, for instance for rain water or waste water, to a shaft 1, then circular openings 14 are cut into the corresponding connection faces 11 and a connection fitting 15 is inserted into the respective opening. Said connection fitting 15 comprises a connection portion 16 lockable with the lower pipe 2 by means of a resilient locking element and a socket 17 for receiving the inlet pipe 12 or the outlet pipe 13, respectively. Details concerning the design of the connection faces 11 and the connection fittings 15 including the connection with the lower pipe 2 are shown and described in EP 1 591 712 B1 to which reference can be made. The connection fittings 15 may also be connected to the inlet pipe 12 or the outlet pipe 13 before they are mounted to the lower pipe 2 of the shaft 1, and only then they are inserted into the respective opening and snap-locked therewith.

Between the connection portions 16 of the two connection fittings 15 arranged diametrically opposite to each other, a so-called flow channel 18 is arranged, which - according to the illustration in Figure 5 - consists of a rigid but flexible elliptical board 19 that has a long symmetry axis 20 and a short symmetry axis 21 that are perpendicular to each other. The board 19 is provided with two weblike snap-in locking protrusions 22 arranged diametrically opposite to each other and protruding outwardly at the two intersections between the short symmetry axis 21 and the periphery of the board 19. The length d21 of the short symmetry axis 21 without the outwardly protruding snap-in locking protrusions 22 is equal to or slightly smaller than the internal diameter d4 of the internal tube 4 of the lower pipe 2 of the shaft 1.

The board 19 is inserted into the lower pipe 2 before both connection fittings are inserted. It is inserted into the pipe 2 from below in such a way that the two snap-in locking protrusions 22 arranged diametrically opposite to each other move into the correspondingly adapted snap-in locking recesses 23 of the respective opening 14, as can be seen in Figure 6. As its long symmetry axis 20 has a greater length d20 than the internal diameter d4, the board 19 is bent about the short symmetry axis 21 and abuts, with its peripheral edge 24, against the internal tube 4, thus forming an upwardly open channel that interconnects and receives the two connection fittings 15 directly, as can be seen from Figure 4. The flow channel 18 is firmly held in this position because the snap-in locking protrusions 22 are firmly held in the snap-in locking recesses 23 by the connection portions 16 of the connection fittings 15, as can be seen in Figure 6. The central longitudinal axis 25 of the shaft 1 intersects the intersection between the long symmetry axis 20 and the short symmetry axis 21.

As can be seen from Figures 3 and 4, when the board 19 is inserted into the shaft 1, it can be bent about its short symmetry axis 21 to such an extent that the crests 26 at the respective intersection between the long symmetry axis 20 and the peripheral edge 24 of the board 19 are approximately on a level with the upper boundaries of the openings 14. In other words the crests 26 are bent upwards in the direction of the central longitudinal axis 25 approximately about the length d4.

The water flowing through the inlet pipe 12 flows through the flow channel 18 towards the outlet pipe 13 directly so substances in the water, such as sand and the like, are unable to deposit in the space 27 below the connection fittings 12. They are carried through the flow channel 18 along a straight line. In the same manner, an inspection camera can be moved from the inlet pipe 12 through the shaft 1 via the flow channel 18 towards the outlet pipe 13 or vice versa.

Claims

A shaft, in particular, a control and purification shaft for wastewater, comprising at least one tube (2, 3) closed by a bottom (10) and having a center length axis (25) and an inner diameter (d4), and comprises two diametrically opposed to one another in relation to the center-length axis (25) arranged for drain pipes (12, 13), and where there is arranged between these connections a flow channel (18), characterized in that the flow channel (18) consists of a flow channel (18). rigid, yet flexible plate (19), which is substantially elliptical with a large axis of symmetry (20) of length d20 and a perpendicularly disposed cutting edge of symmetry thereof (21) having a length d21, which plate is bent upwardly about the small axis of symmetry (21) and wherein the plate at its peripheral edge (24) can substantially abut the inside of the tube (2) in the shaft (1), and the length d21 corresponds approximately to the length of said inner diameter d4, and where at the intersections of the st The axis of symmetry (20) and the peripheral edge (24) are defined by some vertices (26).

A shaft according to claim 1, characterized in that the plate (19) has an insertion protrusion (22) which can be received in the insertion recesses (23) at the connections.

The shaft according to claim 1 or 2, characterized in that the connections comprise openings (14) formed in the shaft and insertable connection pins (15) inserted in these shafts.

Shaft according to Claims 2 and 3, characterized in that the connecting studs (15) have connecting portions (16) which can be inserted into the openings (14) and hold the projections (22) in the settings (23).

Shaft according to one of Claims 1 to 4, characterized in that the length d20 of the axis of symmetry (19) is so large that the apexes (26) associated with the large axis of symmetry (20) can be bent upwards in the shaft ( 1) and this approximately about the length of the diameter d4 and in the direction of the center longitudinal axis (25).

Shaft according to one of claims 1 to 5, characterized in that the tube (2, 3) which forms the main shaft is formed as a built-in tube with a smooth, circular cylindrical inner tube (4) and a corrugated connection thereof. outer tube (5).

Shaft according to one of Claims 1 to 6, characterized in that the pipe (2, 3) which forms the main shaft is formed as a corrugated pipe.

Shaft according to one of claims 1 to 7, characterized in that the tube (2, 3) forming the shaft is made of plastic.

Shaft according to one of claims 1 to 8, characterized in that the plate (19) is made of plastic.