DE20113890U1 - Manhole bottom for sewage shafts - Google Patents

Description

Shaft bottom for sewage shafts

The invention relates to a shaft base for sewage shafts and inspection and cleaning openings for drainage systems with passages for waste water, mixed water or rainwater pipes.

Sewage shafts that consist of a shaft base, several shaft rings, a shaft cone and a shaft cover are well known. They are usually made of precast concrete parts and, depending on the application, have one or more passages for waste water, mixed water or rainwater pipes in the form of closed pipes or open channels. The German patent DE 43 34 7474 A1 describes a sewage shaft that is provided with an open channel at the base for the passage of a waste water or mixed water pipe and with a closed passage for a rainwater pipe running above the shaft base, which is integrated in a console of a shaft ring.

The invention is based on the object of creating a shaft base for sewage shafts and inspection and cleaning openings for the passage of two lines of the same application. According to the invention, this is

16.08.01 Edited by: G omuan^m. Romold-3.G-DE

This is achieved by forming two parallel, open channels in the shaft floor.

The invention has a number of advantages. The new shaft base makes it possible to run two pipes with the same application separately - e.g. two wastewater or mixed water pipes or two rainwater pipes. If the two channels, which run straight without changing direction, have the same cross-section, the same geometric conditions apply and both channels have the same hydraulic properties. The passages can be visually inspected after the shaft cover has been lifted off. It is not necessary to drive into or climb into the shaft to open a cleaning hatch. Both pipes are ventilated and vented equally from the shaft element.

Further advantageous embodiments of the invention can be found in the subclaims. Since, according to claim 8, the height of the channels reaches at least to the top of the outgoing pipes, overflow is not possible even if the pipes are completely filled. If the shaft base is made of plastic, e.g. polyethylene, it can be combined with other system components, such as plastic shaft rings or cones. It is particularly advantageous to manufacture it without manual assembly in an industrial production process from a single-layer, homogeneous material. The component is ready for installation, i.e. no additional auxiliary materials, such as concrete, are required.

The invention is explained in detail below using the embodiments and the drawings. They show:

Fig. 1: a shaft bottom in section seen in the direction of the channel; Fig. 2: the shaft bottom seen from above;

16.08.01 Edited by: G oiobw»-«*—. Romold-3.G-DE

Fig. 3: the shaft bottom seen from the side.

Figures 1 and 2 show a shaft bottom 1 with two open channels 2, 3. The channels 2, 3 run parallel without changing direction and are arranged symmetrically to the center of the shaft bottom 1.

From Fig. 1 it can be seen that the shaft bottom 1 has no bottom jump, so that the channels 2, 3 run completely flush with the bottom. They are integrally formed in the shaft bottom 1. The upper edges 9, 10, 11 of the open channels 2, 3 are above the apex 8, 8' of the two outgoing pipes (connectors 13, 14 in Fig. 2 and Fig. 3). This prevents the channels 2, 3 from overflowing.

Deviating from the embodiment shown in the drawings, it is also possible within the scope of the invention to provide the channels with a different cross-section and/or to form them with a bottom jump in the shaft floor.

Fig. 2 shows a view from above into the shaft floor 1. The two inlets or feeds 4, 5 are connected via the sockets 12, 12'. These are designed as standard for connecting PE, PP or PVC pipe ends and are provided with inlet pipe seals (not shown). The two outlets 6, 7 are designed as standard as spigot ends or molded nozzles 13,14 for connecting a PE, PP or PVC socket. Other pipe systems, such as stoneware or cast iron pipes, can be connected using suitable adapters. Both channels 2, 3 can be visually inspected after the shaft cover has been lifted off. This eliminates the need to drive into or climb into the shaft to open a cleaning flap. To carry out pressure tests, it is possible to insert a shut-off bladder (not shown) into the shaft floor 1. Inspection and cleaning equipment can be introduced into the pipelines through the open channels 2 and 3.

16.08.01 Edit: G

010816 Obm-Ahhl

Romold-3.G-DE

In Fig. 3, the shaft bottom 1 is shown viewed from the side. A nozzle, e.g. 13, is formed on the shaft bottom 1 for each of the two drains.

The entire shaft base 1 with its two integrally formed channels 2, 3 is manufactured as a single-layer, homogeneous plastic component ready for installation in an industrial manufacturing process. It is very stable, so that no additional auxiliary materials, such as concrete, are required.

The shaft base described is used in particular where two pipes with the same application, e.g. two waste water pipes or two rain water pipes, are to be combined in a single shaft for inspection or cleaning purposes. This can be the case, for example, when connecting two semi-detached houses, each of which has a waste water pipe leading to one shaft and a rain water pipe leading to a second shaft.

08/16/01 Edit: G &ogr;&iacgr;&ogr;««™*«. Romold-3.G-DE

Claims (9)

1. Shaft bottom for sewage shafts and inspection and cleaning openings for drainage systems with passages for waste water, mixed water or rainwater pipes, characterized in that two straight, parallel open channels ( 2 , 3 ) are formed in the shaft bottom ( 1 ). 2. Shaft bottom according to claim 1, characterized in that the channels ( 2 , 3 ) have the same cross-section. 3. Shaft bottom according to claim 1, characterized in that the channels have a different cross-section. 4. Shaft bottom according to claim 1, characterized in that the channels ( 2 , 3 ) are arranged at the same level as the bottom. 5. Shaft bottom according to claim 1, characterized in that the channels are arranged with different bottom heights, i.e. with a bottom jump. 6. Shaft bottom according to claim 1, 2 and 4, characterized in that the channels ( 2 , 3 ) are arranged symmetrically to the center of the shaft bottom ( 1 ). 7. Shaft bottom according to one or more of claims 1 to 6, characterized in that it has two separate inlets ( 4 , 5 ) and two separate outlets ( 6 , 7 ). 8. Shaft bottom according to one or more of claims 1 to 7, characterized in that the height of the channels ( 2 , 3 ) extends at least to the apex ( 8 , 8 ') of the outgoing pipelines. 9. Shaft bottom according to one or more of claims 1 to 8, characterized in that it is made from a homogeneous, single-layer plastic, e.g. PE, PP or PVC-U, in an industrial manufacturing process.