DE202004002861U1 - Inspection shaft for underground pipe system has a plastic shaft fitted into a lower socket with minimum reduction of shaft diameter - Google Patents

Abstract

An inspection shaft for an underground pipe system has a plastic shaft (2) fitted onto a socket (1) on the underground pipe with the socket having a slightly wider diameter. The bottom lip of the vertical shaft rests on several elastic stops, or on an elastic support ring. The bottom of the shaft is sealed onto the socket by an external sealing ring (6). The top of the shaft is sealed into a concrete support ring (3) by an upper seal (7). The manhole system (4, 5) is supported on the concrete ring.

Description

The invention relates to a pipe shaft for the Canal construction, consisting of a manhole base made of plastic for Connection of the sewer line (s), a plastic riser pipe, that is inserted into the lower part of the manhole up to an insertion limit and a concrete support ring or telescope to hold one Manhole cover.

It is known for multi-part pipe ducts the riser pipe into the shaft floor up to a limit stop insert. The riser pipe is inserted into the shaft floor until it rests on a step below the insertion opening of the shaft floor. A disadvantage of this version is that the nominal width of the shaft floor is reduced at the step and no longer corresponds to the nominal diameter of the riser pipe.

The invention is based on the object Reason to create a pipe shaft in which the connection between Manhole base and riser pipe can be made without the original cross section of the riser pipe in the manhole bottom is permanently reduced.

According to the invention this is achieved in that the nominal width of the riser pipe and the nominal width of the manhole base are essentially identical and the insertion limitation as a partial cross-sectional taper of the Lower shaft part is formed.

Further advantageous configurations the invention can be found in the subclaims.

Are the insertion limits and on the outlet side to the left and right of the channel in the lower part of the shaft as console-shaped attacks arranged vertically, is opposite a circumferential insertion limit a larger cross section of the bottom part achieved. This has advantages when maintenance and inspection work is required the pipeline, such as camera inspection, leak test or Do the washing up.

Is the shelf limit in the form of circular segment-shaped Consoles designed, additional stiffening of the manhole base is achieved in the vertical direction.

If the insertion limit is considered to be horizontal Rib or in the form of horizontal rib segments, a "spring action" is achieved, through which Vertical loads between riser pipe and manhole base compensated become. This relieves the manhole base when in use.

The manhole base can be advantageous be designed so that the production form with different Recordings for different risers can be combined. This will additional Dividing lines avoided in the mold as well as mold construction and handling while production simplified.

The invention is described below of the embodiments and the drawings explained in detail. Show it:

1 : a pipe shaft, seen from the side, partially cut open;

2 : a shaft lower part of a pipe shaft with the bottom shape of flow channel, with vertical contact surfaces for the riser pipe, seen from the side;

3 : the manhole base after 2 , seen from above;

4 : a lower part of a pipe shaft with the bottom shape of multiple channels, with vertical support surfaces for the riser, seen from the side;

5 : the manhole base after 4 , seen from above;

6 : a shaft lower part of a pipe shaft with the bottom shape of flow channel, with a horizontally circumferential support surface for the riser pipe, seen from the side;

7 : the manhole base after 6 , seen from above;

8th : a shaft lower part of a pipe shaft with the bottom shape of multiple channels, with a horizontally circumferential support surface for the riser, seen from the side;

9 : the manhole base after 8th , seen from above.

In 1 a pipe shaft is shown, which consists of a lower part of the shaft 1 , a riser pipe 2 , a concrete support ring 3 , a balance ring 4 and a manhole cover 5 consists. The riser pipe 2 is in the lower part of the shaft 1 inserted up to a shelf limit and through a seal 6 sealed. Another seal 7 is at the top of the pipe shaft between the riser pipe 2 and the concrete support ring 3 inserted. The nominal size of the riser pipe 2 and the nominal width of the manhole base 1 have approximately the same dimensions and the insertion limit is a partial cross-sectional tapering of the manhole base 1 educated.

The 2 and 3 show a manhole base 11 , whose bottom shape as a straight flow channel 12 is trained. How out 3 the lower part of the shaft points out 11 four vertical console-like stops 13 . 14 . 15 . 16 as insertion limits or contact surfaces for the riser pipe (not shown).

In the 4 and 5 is a manhole base 21 shown, the bottom shape as multiple channels 22 is designed with three inlets and one outlet. 5 shows four contact surfaces for the riser pipe (not shown). Two of the contact surfaces are as vertical console-like stops 23 . 24 outlet side left and right of the channel 22 arranged. Two further contact surfaces are as segmented consoles 25 . 26 inlet side left and right above the channel 22 arranged.

The 6 and 7 show a manhole base 31 , whose bottom shape as a straight flow channel 32 is trained. How out 7 the lower part of the shaft points out 31 a horizontally circumferential, inwardly projecting rib 33 as a support surface for the riser pipe (not shown). Through the rib 33 becomes the cross section of the manhole base 31 first around the size of the rib 33 tapered and then returned to its original size.

In the 8th and 9 is a manhole base 41 shown, the bottom shape as multiple channels 42 is designed with three inlets and one outlet. Here, too, the support surface for the riser pipe (not shown) is a horizontally circumferential rib 43 that are above the channel 42 protrudes inside.

Both in the 6 and 7 shown variant of the manhole base 31 as well as in the in the 8th and 9 shown variant of the manhole base 41 For example, the horizontal insertion limitation for the riser pipe can be designed in the form of inwardly projecting rib segments instead of running all the way around, in part interrupted.

In the 2 . 3 . 6 and 7 bottom parts of the shaft are shown with straight flow channels. Of course, the insertion limits shown there for the riser pipe can also be used for shaft floors with curved flow channels.

Likewise, in the 4 . 5 . 8th and 9 Shelf limits shown are not only used for multiple channels with three inlets, but also for multiple channels with a different number of inlets, e.g. B. two or five.

All shown in the figures and The slide-in limits described can be as follows with the lower parts of the shaft be connected:

• - at the production of the manhole bottom is already molded in,
• - welded in afterwards,
• - afterwards in Manhole base inserted, e.g. B. in guide rails or stops or attachment points. This also means the use of a different material than that of the manhole base.

Claims (8)

Pipe shaft, consisting of a plastic lower part for connecting the sewer line (s), a plastic riser pipe that is inserted into the lower part of the shaft up to an insertion limit, one or more support or compensating rings and a shaft cover, characterized in that the nominal width of the riser pipe ( 2 ) and the nominal width of the manhole base ( 1 ) are essentially identical and the insertion limitation as a partial cross-sectional tapering of the manhole base ( 1 ) is trained. Pipe shaft according to claim 1, characterized in that the insertion limitation for the riser pipe in the form of three or more vertical bracket-like stops ( 13 . 14 . 15 . 16 . 23 . 24 ) is formed in the lower part of the shaft ( 11 . 21 ) are arranged. Pipe shaft according to claim 1, characterized in that the insertion limitation for the riser pipe in the form of circular segment-shaped brackets ( 25 . 26 ) is formed in the lower part of the shaft ( 21 ) are arranged. Pipe shaft according to claim 1, characterized. that the insertion limitation for the riser pipe as a horizontally circumferential, inwardly projecting rib ( 33 ) of the manhole base ( 31 ) is trained. Pipe shaft according to claim 1, characterized in that the shelf limit for the riser pipe in the form of horizontally arranged, protruding inwards Rib segments of the manhole base is formed. Pipe shaft according to one or more of claims 1 to 5, characterized in that the insertion limits in the Manhole base are molded. Pipe shaft according to one or more of claims 1 to 5, characterized in that the insertion limits in the Welded lower part of shaft are. Pipe shaft according to one or more of claims 1 to 5, characterized in that the insertion limits in guide rails or attacks or fastening points of the manhole base are inserted.