DE202016004048U1 - Mud trap for a street inlet - Google Patents

Abstract

Sludge catcher (1) for a road inlet with a first collecting space (7) and a second collecting space (9), and a connecting portion between the first and the second collecting space (7, 9), wherein in the operating position of the sludge catcher (1) at least one upper inlet opening (6) and at least one lower drain opening (17), wherein the first collecting space (7) of the sludge catcher (1) above the second collecting space (9) and the first collecting space (7) through a first bottom (8) substantially is closed at the bottom, and further wherein the second collecting space (9) by a second bottom (10) is closed at the bottom, wherein the connecting portion is formed by at least one tube (11), wherein each of the tubes (11) at least one upper and a lower opening, wherein the upper opening (12) or the upper openings below the upper inlet opening (6) and the lower opening (13) or the lower openings below the lower n drain opening (s) (17) are arranged.

Description

The invention relates to a sludge catcher for a road inlet. Street entrances are typically used for drainage of sealed traffic areas, especially roads. Such street enemas are also known by the term sink boxes. Road inlets for public roads are in terms of their components and dimensions, for example in DIN 4052 standardized. There are also different tree shapes and sizes of such road or Bodeneinläufen known, these are used in particular for the drainage of private court and traffic areas or in special circumstances, such as a lying very close to the road surface sewer.

The most common types of sludge catchers for street inlets are in DIN 4052 standardized. Sludge baskets are usually held by a so-called attachment adapter, which sits on the actual street entrance. Above the top adapter is usually still a support ring made of plastic or concrete to accommodate the load of the overlying essay, in which usually a grate made of cast iron is used. This rust is colloquially often referred to as manhole cover.

Sludge catchers are used to retain coarse debris, such as leaves and debris, which is flushed with wastewater into the road inlet, including mud, debris and the like. For this purpose, the sludge trap typically has a closed bottom and slotted or perforated side walls, depending on the manufacturer and needs of the bottom of the sludge catcher is also closed laterally. This closed area forms a settling basin for mud and sand, the dirty water can pass through the overlying slots or holes in the actual road inlet. Depending on the size of the slots and holes, larger particles, such as leaves or the like, are retained in the bucket. Mud trap buckets must regularly be taken out of the street inlet and emptied or cleaned as part of the channel maintenance.

It is also known to form road enemas without mud pails. These then have a paragraph space at its lower end and an outlet in the sewer, which is located at a certain distance from the lower end of the street inlet. The lower part of the street inlet serves as a sedimentation basin for the mud. These roadways must be regularly cleaned with a special vehicle, in which case the settled sludge is sucked off.

There are also various special types of road inlets known that are used in special circumstances. For example, is from the EP 2 157 252 A1 a road inlet with a retaining device for light liquids such. As gasoline or diesel known. Among others, at the company Romold GmbH, Surheim, Germany, a road inlet is commercially available, in which the drain pipe in the channel has an arc, so that the transition into the channel is at a higher level than the entry from the street inlet. With this design, the road inlet forms a siphon for retaining odors from the channel. Such street entrances with odor trap are also available from many other manufacturers. However, they can only be used if the corresponding structural conditions are present and require an increased workload of the civil engineer when installing the street inlet.

From the DE 103 49 347 A1 is a gully with a built-in housing and an odor trap known. In this case, the gully comprises a conventional leaf trap and a construction located underneath, which is sealingly inserted into a retaining ring in the gully. This device comprises a shallow hopper and a U-shaped drain pipe, so that the water that has passed through the holes in the leaf trap drips into the inlet funnel of the trap and from there via the U-shaped drain pipe in the lower portion of the sink box and then gets into the process. Due to the U-shaped design of the drain pipe this serves as a siphon. To clean the odor trap, first remove the leaf catch basin in addition to the grate and then remove the odor trap.

This is described as advantageous with regard to a previously known sink box, as it is known in DE G 85 21 273 U1 is described. There a sink box is disclosed in which a concentric siphon-like arrangement of the pipe guide is provided within a sludge trap. The sludge trap described therein requires a specially adapted gully with a lid that has only radially outside entrance holes for surface water. Within the specially designed sludge trap, the water is diverted several times before it enters the drain.

From the DE 39 08 732 A1 an odor trap of Innensiphonart is known, in which the water passing through is also deflected in a U-shape and leaves the assembly near the water inlet through openings in the radial peripheral wall of the device. A similar water supply is also in the DE 35 36 616 A1 for one Odor trap for floor drains described, the odor trap should consist of a double-walled bowl. From the DE 102 20 254 A1 For example, an odor trap for sewage drains and manholes is known, comprising an insert body for insertion into the road inlet, with a collar-shaped water outlet at its lower end which is closed by a float valve unless a certain minimum amount of water has accumulated in the insert part. The seal body is guided through the collar-shaped outlet and the underside of a specially adapted sludge catcher. If no water runs into the street inlet, the float sinks and closes the drain opening as a float valve, so that odors from the channel can not escape through the floor inlet into the environment. If the float valve is blocked, for example, by dirt particles, either the wastewater no longer flows or the closure no longer seals against escaping unpleasant odors.

From the DE 197 24 783 A1 an odor trap is known for manholes in sewage systems, in which an insert is provided, on which a support ring is arranged, which is connected to a side of the manhole sealing gasket. On the support ring a protective funnel is arranged, which extends from the support ring downwardly tapering along its longitudinal axis and is open at its lower end. In the middle region of the protective funnel a valve jacket is arranged with its upper end. The valve jacket extends coaxially downwardly to the protective funnel, with a dirty water collector being arranged at the lower end of the valve jacket. The dirty water collector tapers from its upper end down, at the bottom of the dirty water collector a bottom valve is arranged with a subsequent odor trap. One or more ventilation valves are arranged on the circumference of the valve jacket and one or more overpressure valves on the circumference of the protective funnel. The odor trap consists of a spring-loaded film tube, which is surrounded by a rectangular ring closure with a slot in which the film tube is arranged. If water is present in front of the bottom valve, the valve formed by the spring-loaded film tube is opened by the weight of the water against the spring force. If there is no water above the valve, the valve is closed by the spring force.

From the DE 296 19 265 U1 is a gully with an odor trap known, which is similar to a labyrinthine water flow in a mounting housing below a sludge trap arranged. Such a gully should be particularly advantageous because the installation housing with the odor trap should be completely removed from the gully and thus the entire gully can be easily cleaned.

From the DE 203 12 425 U1 is a Bodeneinlauf with an odor trap is known in which under a conventional sludge trap a funnel-shaped partition wall is provided, via which the wastewater from the sludge trap can run into a U-shaped pipe element that forms a trap in the manner of a siphon. A special feature of this ground inlet proposed there is to be that the funnel-shaped intermediate wall has a cleaning opening, via which the lower part of the bottom inlet with the U-shaped tube element is accessible for cleaning purposes.

A device for odor sealing and ventilation of manholes in sewage systems with a hose valve is further from the DE 296 13 463 U1 known. From the DE 20 2006 006 275 U1 is a mud bucket with an odor trap for street procedures known. For this purpose, the sludge bucket to have only on the part of its lateral surface drainage holes, further comprising a central partition wall is to be provided, which should close in the upper area especially the side with the drain holes.

From the WO 2015/010986 A1 Finally, an odor trap for a wastewater discharge device is known in which a cup-like insert is also provided. For a better and more hygienic cleaning, it is proposed that the discharge nozzle be connected to a drain pot via a connecting device firmly and without gaps between the outlet nozzle, the connecting device and the drain pot, whereby the odor trap to a uniform manageable column-free and easy to clean part.

The invention is therefore based on the object to provide an easy-to-use and cost-producible sludge catcher for a road entry.

This object is achieved by a sludge trap of the type mentioned with a first plenum and a second plenum, and a connecting portion between the first and the second plenum, wherein in the use position of the sludge catcher at least one upper inlet opening and at least one lower drain opening, wherein the first plenum of the sludge catcher is located above the second plenum and the first plenum is substantially bottomed by a first floor, and further wherein the second Filling chamber is closed by a second bottom down, wherein the connecting portion is formed by at least one tube, wherein each of the tubes has at least one upper and one lower opening, wherein the upper opening or the upper openings below the upper inlet opening and the lower opening or the lower openings are arranged below the lower drain opening (s). The design according to the invention makes it possible to provide a simply constructed, economically producible sludge-catcher for street inlets, which additionally has the additional benefit of an odor trap. Furthermore, the sludge trap according to the invention can easily be used in standard street entrances, even subsequently. Thus, with changed operating conditions odor nuisance of the residents can be equipped by simply replacing an existing sludge catcher against an inventive with an odor trap.

Preferably, the sludge trap bucket comprises an upper main body portion and a lower sub body portion, wherein the upper main body portion includes the at least one upper intake port, the first plenum and the first bottom, and the second body portion comprises the second plenum and the second bottom, and the drain port between upper main body portion and lower sub-body portion is formed. The inventive design makes it possible to clean the sludge trap with a conventional suction vehicle largely even when installed, since both the first and the second plenum can be achieved with a conventional suction hose without any parts or the entire sludge catcher be removed from the street inlet would.

Particularly simple and expedient is an inventive sludge catcher when the upper opening or the upper openings of each of the tubes above the first floor is or are, and that the lower opening or the lower openings of each of the tubes below the first floor and above the second Floor are arranged or are, preferably, when the one or more tubes that form the connecting portion, the secondary body portion mechanically connect to the main body portion. It is particularly advantageous for handling in use, when the sludge trap is formed substantially in one piece. This way, the sludge catcher can be easily removed for cleaning the street intake without it having to be disassembled. The fact that the mud bucket can not be disassembled, is effectively prevented that after re-installation malfunction may occur due to incorrect installation or forgotten items, as is the case in the prior art.

If the sludge catcher is preferably made of a polyethylene material as preferred, it can be particularly easy to produce, for. B. by welding several parts, by injection molding or Rotationsgießverfahren, and is particularly resistant to the typically occurring in street sewage substances. Furthermore, the material of such inventive sludge catcher can be recycled relatively well after use. A particularly good life cycle assessment can be obtained if the material of the sludge catcher contains recyclate, the z. B. was obtained from sludge catchers according to the invention.

A particularly compact design results when the drain opening is formed substantially concentric with the connecting portion. Thus, a sludge catcher according to the invention is also very useful in cases where the sewer is located at a relatively shallow depth below the surface to be drained.

A particularly effective separation at a high possible volume flow passage is obtained when the ratio of the height of the upper opening of the connecting portion above the first bottom of the first plenum to the diameter of the tube forming the connecting portion is about 1: 1, and / or the ratio Cross-sectional area of the upper opening of the connecting portion to the cross-sectional area of the lower drain opening is about 1: 3 to 1: 4.

Good self-cleaning properties with effective odor trap arise when the second floor is curved upward widening, in particular as a spherical shell is formed, in particular, when the second floor is formed by an upwardly open Kalottenschale, in particular hemispherical.

The first plenum may serve as a standard standard mud cess bucket for retaining coarse debris or leaves entering through the inlet opening when at least one of the tubes has holes or slots in its area located above the first floor, particularly if the holes or holes Slots in the upper half of the area, which is located above the first floor are located.

Particularly easy to handle is the sludge trap according to the invention, if this has a fixed to the main body portion handle for lifting the sludge catcher from a street inlet. In order to to prevent fluids such as sewage from the road surface or other gases from the sewer to pass through the road inlet without passing through the mud bucket according to the invention, it is particularly advantageous if the mud bucket further comprises a seal made of an elastic material such as an elastomer Has dense insertion of sludge catcher in the street inlet.

The invention will be described below with reference to exemplary embodiments with reference to the accompanying drawings. Show it:

1 a first embodiment of a sludge catcher according to the invention in side view on the narrow side;

2 a sectional view of the sludge catcher from 1 in the longitudinal extent;

3 a plan view of a sludge trap according to the invention;

4 a second embodiment of a sludge catcher according to the invention in a perspective view;

5 the embodiment of a sludge catcher according to the invention 4 in side view on the long side;

6 the embodiment of a sludge catcher according to the invention 4 and 5 in side view on the narrow side

7 a plan view of another embodiment of a sludge catcher according to the invention; and

8th a cross-sectional view of the embodiment of a sludge catcher according to the invention from 7 ,

In the figures, various particularly preferred embodiments of the invention are shown by way of example purely by way of example. The invention can be realized within the scope defined by the claims in other embodiments and feature combinations. In the figures, the invention is similar based on embodiments of oval road enemas DIN 4052 forms C and D represented, in which the realization of an odor trap according to the prior art due to the non-round cross section is particularly complex. Of course, the invention can also be implemented in round road entrances, so that the benefits can be used for all street enemas, where previously normal sludge buckets are used.

The invention also has the particular advantage that it can also be used for street enemas in which hitherto short sludge buckets, z. B. after DIN 4052 form B be used, for example, because the channel level is relatively close to the surface to be drained or other structural restrictions on the height or shape of the street inlet exist. Also, the invention can also be applied to other types of road inlets without being limited to the only example given here DIN 4052 ,

The sludge trap according to the invention shown in the figures is a total of 1 designated. The embodiments shown are here, for example, to the design DIN 4062 form C ajar, since this is a design that is used particularly frequently in residential areas, where the retrofitting of existing road entrances with a sludge trap according to the invention to reduce the burden of disturbing odors from the sewer system is particularly advantageous.

The 1 . 2 . 5 . 6 . 8th show a sludge trap according to the invention 1 in its normal position of use, when it is inserted into a (not shown) road inlet, that is, all information for orientation in space, such as "up" or "down", "above" and "below", etc. in this description and The claims relate to this position of use.

For example, the types of sludge catchers shown here 1 they have a narrow side 2 and a long side 3 on, which results from the oval shape of the design chosen here to illustrate the invention, as easy 4 can be seen.

In the 1 and 6 are sludge catcher according to the invention 1 in side view on the narrow side 2 shown. Well recognizable here is that the mud bucket 1 an upper main body portion 4 and a lower body section 5 includes. As in the sectional views ( 2 and 8th ), the upper main body section comprises 4 the at least one upper inlet opening 6 , a first collection room 7 from the first floor 8th is essentially completed down. In the under the main body section 4 arranged Nebenkörperabschnitt 5 there is the second collection room 9 passing through a second floor 10 is completed down.

In the in the 1 to 3 illustrated embodiment is the second floor 10 essentially trained and of a peripheral 15 surrounded, creating a kind of bowl, which is the second plenum 9 forms. peripheral 15 and second floor 10 are formed in one piece, z. B. by injection molding, welding or rotational molding. In the in the 4 to 8th the embodiment shown is the Nebenkörperabschnitt 5 with a curved upwardly curved, in particular as an upwardly open spherical calotte shell, preferably hemispherical, formed second bottom 10 ' provided, whereby in this embodiment, the second plenum 9 is formed.

Main body portion 4 and minor body section 5 are connected by a connecting section, here through a pipe 11 is formed. Instead of the preferred single tube shown here 11 it is also possible to provide a plurality of tubes of smaller cross section. The pipe 11 has an upper opening 12 and a lower opening 13 on. The upper opening 12 is located below the upper inlet opening 6 but above the first floor 8th , The lower opening 13 lies below an edge 14 , the second collection room 9 limited to the top. The pipe 11 penetrates the first floor 8th approximately centered and is tightly connected to this, z. B. by welding, so that the first floor 8th the pipe 11 surrounds annularly. The pipe 11 has a smaller diameter than the second plenum 9 ,

In the area of its lower end is the tube 11 with the minor body portion 5 firmly connected, the here by peripheral wall 15 and second floor 10 or the dome-shaped second floor 10 ' is formed. The compound can be done in a known manner, for. B. by radial web-shaped spokes 16 , z. B. four or three spokes 16 as in the 2 respectively. 4 and 8th you can see. The minor body section 5 So depends below the main body section 4 and this is about the pipe 11 held. The main body section 4 has a collar in its upper area 18 on, with which the sludge catcher according to the invention 1 in use in a conventional manner rests on a top adapter or support ring of a road inlet and is held by the street inlet. Underneath the collar, there is advantageously provided a seal (not shown) of an elastic material, such as an elastomer, for sealingly inserting the sludge catcher into the road inlet.

Between the bottom of the main body section 4 and the lower body portion 5 , more precisely the upper edge 14 through the peripheral wall 15 or the dome-shaped second floor 10 ' formed second collection space 9 , is a lower drain opening 17 the mud-box bucket 1 formed, through which the wastewater can flow laterally radially outward into a lower part of a street drain and thus into the sewer. The drain opening 17 So it has the shape of a pipe 11 concentric annular gap between the underside of the main body section 4 and lower body section 5 , The lower opening 13 of the pipe 11 is below the edge 14 formed lower edge of the drain opening 17 ,

The first collection room 7 and second plenum 9 serve as two-stage settling tanks for wet sludge and sediments entrained by water. By the retention of these substances they can be kept away from the sewer in the context of regular emptying or cleaning a sludge catcher according to the invention and thus reduce the flushing effort and a seeping of the sewers.

Runs wastewater through the inlet opening 6 in the sludge catcher according to the invention 1 This first enters the first collection room 7 , There, the water is calmed, so that sediments and wet mud on the first floor 8th can settle. Exceeds the water level in the first plenum 7 the height of the edge of the upper opening 12 of the pipe 11 , the water runs through the pipe 11 and its lower opening 13 in the second collection room below 9 , There, the water is calmed down again, so that any entrained sediments on the second floor 10 can settle. Once the water level in the second plenum 9 the edge 14 exceeds, loud, the water through the drain hole 17 from the mud-bucket 1 in the lower area of the street entrance and further into the canal. As a result of the arrangement according to the invention, the lower opening 13 of the pipe 11 below by the edge 14 certain water level in the second plenum 9 is located, an odor trap is formed, which allows the escape of odors from the channel through the sludge catcher 1 prevented.

Occur z. B. in a downpour suddenly large amounts of water in the sludge catcher 1 a part of the water passes directly into the upper opening 12 of the pipe 11 and at a relatively high speed in the second plenum 9 , By the two-time deflection of the fluid flow, a purging of the second plenum takes place 9 , so that the lighter sediments located there are washed away with the large volume flow of wastewater, which is not disturbing because due to the large volume flow of wastewater in such a case settling in the sewer pipes and the channel is not to be feared.

For ease of use in use is the sludge catcher 1 essentially formed in one piece. That's how the mud-bin bucket works especially easy to clean the street entrance to be removed without having to be disassembled. The fact that the mud bucket can not be disassembled, is effectively prevented that after re-installation malfunction may occur due to incorrect installation or forgotten items, as is the case in the prior art.

If the mud-bucket 1 As is preferably made essentially of a polyethylene material, it can be particularly easy to produce, for. B. by welding several parts, by injection molding or Rotationsgießverfahren, or combinations thereof. and is particularly resistant to the typically occurring in the street sewage substances. Furthermore, the material of such inventive sludge catcher can be 1 recycle relatively well after use. A particularly good life cycle assessment can be obtained if the material of the sludge catcher contains recyclate, the z. B. from sludge catchers according to the invention 1 was won.

The ratio of the height of the upper opening 12 of the pipe 11 over the first floor 8th the first collection room 7 to the diameter of the pipe 11 is preferably about 1: 1. As a favorable ratio of the cross-sectional area of the upper opening 12 of the pipe 11 to the cross-sectional area of the lower drain opening 17 has a value of about 1: 3 to 1: 4 turned out.

In the 8th shown embodiment has in the upper region of the tube 11 Holes or slits 19 on. Preferably, the holes or slots 19 in the upper half of the area of the pipe 11 arranged above the first floor 8th located. This can also be foliage or coarse dirt in the first plenum 7 be restrained, which is floatable and otherwise with the sewage over the upper opening 12 in the pipe 11 would be flushed.

Particularly easy to handle is the sludge trap according to the invention, if this one on the main body portion 4 attached handle 20 to lift out the sludge catcher 1 from the street inlet. The handle 20 expediently has bow shape and is located inside in the sludge catcher 1 arranged to facilitate the sealing of the system. Advantageous is the handle 20 like in the 2 to 4 and 7 to 8th shown pivotable in a rest position.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2157252 A1 [0005]
• DE 10349347 A1 [0006]
• DE 8521273 U1 [0007]
• DE 3908732 A1 [0008]
• DE 3536616 A1 [0008]
• DE 10220254 A1 [0008]
• DE 19724783 A1 [0009]
• DE 29619265 U1 [0010]
• DE 20312425 U1 [0011]
• DE 29613463 U1 [0012]
• DE 202006006275 U1 [0012]
• WO 2015/010986 A1 [0013]

Cited non-patent literature

• DIN 4052 [0001]
• DIN 4052 [0002]
• DIN 4052 forms C and D [0033]
• DIN 4052 Form B [0034]
• DIN 4052 [0034]
• DIN 4062 Form C [0035]

Claims (16)

Sludge catcher ( 1 ) for a street inlet with a first collecting space ( 7 ) and a second collection space ( 9 ), and a connecting portion between the first and the second collecting space ( 7 . 9 ), whereby in use position the sludge catcher ( 1 ) at least one upper inlet opening ( 6 ) and at least one lower drain opening ( 17 ), wherein the first collecting space ( 7 ) of the sludge catcher ( 1 ) above the second plenum ( 9 ) and the first collection room ( 7 ) through a first floor ( 8th ) is substantially closed at the bottom, and further wherein the second collecting space ( 9 ) through a second floor ( 10 ) is closed at the bottom, wherein the connecting portion through at least one tube ( 11 ), each of the tubes ( 11 ) has at least one upper and one lower opening, wherein the upper opening ( 12 ) or the upper openings below the upper inlet opening ( 6 ) and the lower opening ( 13 ) or the lower openings below the lower drain opening (s) ( 17 ) are arranged. Sludge catcher ( 1 ) according to claim 1, characterized in that the sludge catcher ( 1 ) an upper main body portion ( 4 ) and a lower secondary body section ( 5 ), wherein the upper main body portion ( 4 ) the at least one upper inlet opening ( 6 ), the first collection room ( 7 ) and the first floor ( 8th ), and the minor body portion (FIG. 5 ) the second collection space ( 9 ) and the second floor ( 10 ), and the drain opening ( 17 ) between upper main body portion ( 4 ) and lower part of the body ( 5 ) is formed. Sludge catcher ( 1 ) according to one of the preceding claims, characterized in that the upper opening ( 12 ) or the upper openings of each of the tubes ( 11 ) above the first floor ( 8th ) is or are, and that the lower opening ( 13 ) or the lower openings of each of the tubes ( 11 ) below the first floor ( 8th ) and above the second floor ( 10 ) is or are arranged. Sludge catcher ( 1 ) according to claim 3, characterized in that the pipe (s) ( 11 ), which constitute the connecting portion, the sub-body portion (FIG. 5 ) mechanically with the main body portion ( 4 ) connect. Sludge catcher ( 1 ) according to one of the preceding claims, characterized in that the sludge catcher ( 1 ) is formed substantially in one piece. Sludge catcher ( 1 ) according to one of the preceding claims, characterized in that the sludge catcher ( 1 ) is made substantially of a polyethylene material. Sludge catcher ( 1 ) according to claim 6, characterized in that the material of the sludge catcher ( 1 ) Contains recyclate. Sludge catcher ( 1 ) according to one of the preceding claims, characterized in that the drain opening ( 17 ) substantially concentric with the connecting portion (FIG. 11 ) is trained. Sludge catcher ( 1 ) according to one of the preceding claims, characterized in that the ratio of the height of the upper opening ( 12 ) of the connecting portion above the first floor ( 8th ) of the first collection space ( 7 ) to the diameter of the tube ( 11 ) constituting the connecting portion is about 1: 1. Sludge catcher ( 1 ) according to one of the preceding claims, characterized in that the ratio of the cross-sectional area of the upper opening ( 12 ) of the connecting portion to the cross-sectional area of the lower drain opening (FIG. 17 ) is about 1: 3 to 1: 4. Sludge catcher ( 1 ) according to any one of the preceding claims, characterized in that the second base curves upwardly, in particular as a spherical shell ( 10 ' ), is trained. Sludge catcher ( 1 ) according to claim 11, characterized in that the second floor ( 10 ' ) is formed by an upwardly open Kalottenschale, in particular hemispherical. Sludge catcher ( 1 ) according to one of claims 3 to 12, characterized in that at least one of the tubes ( 11 ) in its area above the first floor ( 8th ), holes or slots ( 19 ) having. Sludge catcher ( 1 ) according to claim 13, characterized in that the holes or slots ( 19 ) in the upper half of the area above the first floor ( 8th ) is located. Sludge catcher ( 1 ) according to one of claims 2 to 14, further comprising one on the main body portion ( 4 ) attached handle ( 20 ) for lifting out the sludge catcher ( 1 ) from a street entrance. Sludge catcher ( 1 ) according to one of claims 2 to 15, further comprising a seal made of an elastic material, such as a Elastomer, for tight fitting of the sludge catcher ( 1 ) in the street inlet.

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