EP1726726A1 - Trou d'inspection - Google Patents

Trou d'inspection Download PDF

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Publication number
EP1726726A1
EP1726726A1 EP06010622A EP06010622A EP1726726A1 EP 1726726 A1 EP1726726 A1 EP 1726726A1 EP 06010622 A EP06010622 A EP 06010622A EP 06010622 A EP06010622 A EP 06010622A EP 1726726 A1 EP1726726 A1 EP 1726726A1
Authority
EP
European Patent Office
Prior art keywords
passageway
channel
inspection pit
passages
transition piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06010622A
Other languages
German (de)
English (en)
Inventor
Gerrit Berend Jan Meppelink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dyka BV
Original Assignee
Dyka BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dyka BV filed Critical Dyka BV
Publication of EP1726726A1 publication Critical patent/EP1726726A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
    • E03F5/024—Manhole shafts or other inspection chambers; Snow-filling openings; accessories made of plastic material
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
    • E03F5/021—Connection of sewer pipes to manhole shaft

Definitions

  • the invention relates to inspection pits.
  • An inspection pit is a vertical aid in a sewage line for waste water or precipitation.
  • the inspection pit is usually accessible via the street, where it is covered by a lid.
  • One or several influent lines and usually one effluent line lead into an inspection pit.
  • the inspection pit can be used for transition between the influent and effluent lines whether or not the diameters of those lines are different from each other.
  • the inspection pit can furthermore be used for changing the direction between the influent and effluent lines. Most of all, the inspection pit is intended for offering an inspection opportunity of the influent and effluent lines, and optionally to clean them.
  • a particular shape is the end pit, in which only one or several discharge outlets are connected to the bottom.
  • Inspection pits comprise a main body, also named 0shaft, available in a number of different diameters, for instance 400, 600, 800 and 1000 mm.
  • the usual diameters for the influent and effluent lines to be connected thereto are 110, 125, 160, 200, 250, 315, 400 and 500 mm.
  • a flow-through channel has been disposed between the influent opening and the effluent opening, which flow-through channel usually has a semi-circular bottom profile in cross-section, optionally elevated by means of vertical walls up to the upper side inside tube of the largest connected pipe. Remaining surfaces (banks) discharge at a fall to the flow profile. Thus the flow-through channel is accessible from above.
  • the flow-through channels are usually formed in a bottom portion that has been placed at the bottom in the shaft.
  • a bottom portion is provided with bottom plates sloping downward to the flow-through channel, the so-called banks.
  • a drawback is that for each connection diameter, unequal or different at the influent side and the effluent side, a separate mould will in principle be necessary.
  • a flow channel bottom namely has to be as streamlined as possible, generate as little additional flow resistance as possible. It will have to be fitted separately in the system by the fitter.
  • the invention provides an inspection pit comprising a bottom and a circumferential wall, wherein the circumferential wall is provided with at least one upstream and one downstream passageway for receipt and discharge, respectively, of waste water and the bottom is provided with a channel for passage of the waste water from the upstream passageway to the downstream passageway, wherein both passageways are adapted for connection to a supply pipe and a discharge pipe, respectively, wherein the channel and the passageways form passages having flow cross-sections and the inspection pit at the location of the interconnection between at least two of the passages is provided with an accommodation space for a transition piece for if necessary defining a flow transition between those two passages.
  • both passages to be interconnected have flow cross-sections of a different size.
  • both passages to be interconnected have flow cross-sections of an equal size.
  • transition piece it is possible here by leaving out the transition piece, to realise a largest flow cross-section and for obtaining a smaller flow cross-section to use a suitable transition piece.
  • the transition piece used may have an inner surface designed for smooth connection to the inner surfaces of both passages, at least as regards a lowermost portion of the passages in question. Both passages may have a lowermost portion that is semi-circular.
  • the inner sides of the bottoms of both passages may be aligned for forming a watercourse without thresholds.
  • the flow may be further improved when the transition piece has a smallest thickness, considered in flow direction, at the location of the middle of the bottom.
  • the thickness of the transition piece can increase in a direction away from the middle of the bottom, as a result of which at higher locations in the cross-section length is provided for changing the position of the flow-bounding surfaces.
  • the transition piece defines a circumferential inner surface, as a result of which the flow in transfer can be guided to a larger cross-section in upward direction as well. If at one side of the transition piece a circular passageway opening is formed, a proper connection to the influent or effluent pipe can be realised. At the opposite side the transition piece may have a passageway opening that deviates from a circular shape, preferably having a largest size in the vertical direction of the flow cross-section.
  • an accommodation space for a transition piece is situated. If necessary a suitable transition from influent side to channel can be effected by placing a transition piece there.
  • the normative flow cross-section of the channel can be larger than the one of at least the upstream passageway.
  • an accommodation space for a transition piece can be situated at least at the location of the downstream passageway.
  • the normative flow cross-section of the channel can be smaller than the one of at least the downstream passageway.
  • the normative flow cross-section of the channel can be larger than the one of the downstream passageway.
  • the channel in the bottom defines a passage with a substantially constant flow cross-section. In another embodiment the channel in the bottom defines a passage with a different flow cross-section at the ends.
  • the outer circumference of the circumferential wall can remain unchanged, optionally including integrally formed connection stubs.
  • the bottom including channel has been formed as one piece, preferably having bank forming bottom plates over which water can run down to the channel.
  • the bottom can be formed by injection moulding, vacuum moulding, blow moulding, rotation moulding etc., preferably of a thermoplastic material.
  • the invention provides an inspection pit comprising a bottom and a circumferential wall, wherein the circumferential wall is provided with at least one passageway for receipt or discharge of waste water and the bottom is provided with a channel for passage of the waste water from or to the passageway, wherein the passageway is adapted for connection to a supply pipe or a discharge pipe, wherein the channel and the passageway form passages having flow cross-sections, and the inspection pit at the location of the interconnection between the passages is provided with an accommodation space for a transition piece for if necessary defining a flow transition between said two passages. In that way the transition piece can also be used in a so-called end pit.
  • the invention provides a transition piece suitable and intended for an inspection pit according to the invention.
  • the invention provides a water discharge system provided with an inspection pit according to the invention.
  • the inspection pit 1 shown in figure 1 has been accommodated in a bottom 100 having a paved ground level 101.
  • the inspection pit 1 comprises a straight circle-cylindrical circumferential wall 2 and a lowermost portion 5 with bottom 18, on which, in a fitting manner a bottom portion 6 has been placed.
  • Via connections 7 and 8, formed as one unity with the circumferential wall 2, an influent line 108 and effluent line 107, respectively, are connected to the inspection pit 1.
  • the inspection pit 1 is closed off by a street lid 4, whether or not by means of a setting structure or by using a shaft diameter adapter.
  • the inspection pit 1 may have been manufactured in parts for instance by injection moulding a suitable synthetic material, particularly thermoplastic synthetic material.
  • the circumferential wall 2 can be formed as one unity with the connections 7 and 8 as well as the bottom plate 18, and also the bottom portion 6 can be formed as one unity per se.
  • the circumferential wall may also consist of an extrudate in which spouts/pipe stubs are disposed afterwards.
  • the bottom portion 6 shown in figure 2 is a hollow body having a circumferential wall 15 and an upper wall 14, which upper wall 14 is divided into two surfaces 14a, 14b by a channel 9, which for instance at a bend runs slightly curved and to which the surfaces (banks) 14a, 14b dewater.
  • the bottom portion 6 is circular.
  • the channel 9 has a cross-section as schematically shown in figure 5D, having a semi-circular bottom 13 and side walls 12a, 12b that are perpendicularly upright therefrom.
  • Figure 3A shows a possible diameter course.
  • the connection pipe piece 8, that has been formed as one unity with the circumferential wall 2 has a diameter D1 (figure 5F), which is smaller than the diameter D2 of the circle defining the bottom area 13 of the channel 9 (figure 5D).
  • D1 (figure 5F)
  • D2 the diameter of the circle defining the bottom area 13 of the channel 9
  • D3 the connection piece at the effluent side 7 has a slightly larger diameter D3 (figure 5E).
  • FIG 5G shows an alternative for channel 9, wherein the banks connect directly to a semi-circular bottom.
  • the diameter D1 may be 144 mm, so that in case of a wall thickness of 8 mm the external pipe size is 160 mm.
  • the diameter D2 may be 170 mm and the internal diameter D3 180 mm (in case of a wall thickness of 10 mm an external diameter of 200 mm). See figures 5D-F as well.
  • both line sizes influent and effluent
  • connection of the bank surfaces 14a, 14b is placed lower by reducing the value 12a, b (in the most extreme case to nil so that the banks connect to the upper edges of the circular bottom area 13, see figure 5G), the flow-through profile of the channel 9 itself is reduced. It will be understood that there is freedom in designing here.
  • connection piece 7 use is made of the mortise 16 at the location of the transition between the connection piece 7 and the channel 9, in which mortise a collar 7a projecting inward from the circumferential wall 2 fits.
  • the inclined transition surfaces 17 ensure a smooth transition from the channel 9 to connection piece 7.
  • transition piece 20 At the influent side a transition piece 20 according to an embodiment of the invention is shown between the channel 9 and connection piece 8, which with a collar 8a extends inward from the circumferential wall 2. Said transition piece 20 is further shown in figures 4A-C.
  • the transition piece 20 is for instance manufactured by injection moulding a synthetic material and has a front side, shown in figure 4A, and a rear side, shown in figure 4B.
  • the rear side is intended to be facing the inner surface of the circumferential wall 2.
  • the transition piece can also be designed solid, foamed, hollow, open at one side or without ribs.
  • the transition piece can be looped/circumferential or U-shaped.
  • the transition piece 20 defines a looped passageway 25, which at the upper side is bounded by a transverse portion 22, at the sides is bounded by legs 21, and at the lower side is bounded by bottom portion 23, wherein the parts 21, 22 and 23 form one unity with each other.
  • a flange 26 is formed, that fits in mortise 16 of bottom portion 6, at the location of end 10 or 11.
  • the transverse portion 22 is formed with an upper plate 27 having a convex rear edge 24, the curvature of which matches the curvature of the inner surface of the circumferential wall 2.
  • the bottom area 23 is thinnest, and it is enlarged as regards thickness in the legs 21, so as to have its largest thickness in the transverse portion 22.
  • the legs 21 are V-shaped in cross-section, having a transitional surface 21a for flow guidance and an outer surface 21 b.
  • the incline of the surface 21 b matches the incline of the surface 17.
  • the transverse portion 22 has a convex or inclined lower surface 22a.
  • the transition piece 20 forms a transition having a circular opening 25a at the rear side, having a diameter D4 preferably corresponding with diameter D1, and at the channel side having an enlarged passageway 25b, through said inclined surfaces 21 a and inclined lower surface 22a.
  • connection piece 8 to channel 9.
  • FIG 5B It can be seen that the upper plate 27 is contiguous in one plane to the bank surfaces 14a, 14b.
  • FIG 5A it can be seen how the connection would be if no transition piece 20 were used. Comparing figures 5A and 5B shows that by using a transition piece according to the invention a smooth transition without thresholds is created.
  • the bottom area 23 is in line with the axial line of the bottom areas 13 of the channel 9 and of the connection piece 8.
  • the inclined surfaces 21 a and 22a are formed such that a transition is realised that is smooth and without thresholds as much as possible.
  • connection piece 8 has a larger diameter D5, of 180 mm. Due to the small difference between 180 mm and 170 mm (diameter D2), it is possible here to leave out a transition piece.
  • the inclined walls 17 and 11 ensure a smooth transition between these two diameters.
  • the bottom portion 6 with channel 9 having diameter D2 of 170 mm can be used without transition pieces with the influent and effluent lines having an outer diameter of 200 mm, with transition pieces 20 for influent and effluent lines having an outer diameter of 160 mm, and, as is the case in the example, with one transition piece 20 at the influent side, in case of a influent line having an outer diameter of 160 mm and an effluent line having an outer diameter of 200 mm.
  • 110 mm can be combined with 125 mm, 160 mm with 200 mm, 250 mm with 315 mm, or 400 mm with 500 mm. It is also possible to combine 125 mm with 160 mm. It is also possible to combine three successive diameters, for instance 110 mm, 125 mm and 160 mm with a bottom of for instance 138 mm internally with connections of 160 mm and using transition pieces according to the invention at the location of the connections at 110 mm and 125 mm.
  • a synthetic inspection pit having a flow profile which by using or leaving out transition pieces can be used for several consecutive connection diameters.
  • Optionally changing bottom diameters are possible by selectively placing said internal transition pieces.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sewage (AREA)
EP06010622A 2005-05-23 2006-05-23 Trou d'inspection Withdrawn EP1726726A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1029091A NL1029091C2 (nl) 2005-05-23 2005-05-23 Inspectieput.

Publications (1)

Publication Number Publication Date
EP1726726A1 true EP1726726A1 (fr) 2006-11-29

Family

ID=35517405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06010622A Withdrawn EP1726726A1 (fr) 2005-05-23 2006-05-23 Trou d'inspection

Country Status (2)

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EP (1) EP1726726A1 (fr)
NL (1) NL1029091C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008011436A1 (de) * 2008-02-27 2009-09-03 Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg Kunststoff-Reduzierstück und mit wenigstens einem derartigen Reduzierstück ausgestattetes Schachtbodenstück
DE102009037042A1 (de) * 2009-08-13 2011-02-17 Hegler Plastik Gmbh Schacht, insbesondere Kontroll- und Spül-Schacht für Abwasser mit einem Fließ-Gerinne und Platte für ein Fließ-Gerinne
EP2107174A3 (fr) * 2008-04-01 2012-02-22 Uponor Innovation AB Puits et fond de puits
CN112832292A (zh) * 2021-04-16 2021-05-25 苏州建筑工程集团有限公司 装配式检查井

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1027816B1 (nl) 2019-12-02 2021-06-28 D S Plastics Belgium Bvba Inspectieput en werkwijze voor vervaardiging ervan

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1229497A (fr) * 1968-10-22 1971-04-21
DE2509909A1 (de) * 1975-03-07 1976-09-16 Andreas Weiss Verfahren zum erstellen einer rinnensohle in einem revisionsschacht und platte zur durchfuehrung des verfahrens
GB1471862A (en) * 1974-06-06 1977-04-27 Molyneux Ltd Manholes for drainage systems
GB2035413A (en) * 1978-09-05 1980-06-18 Reed International Ltd Drainage inspection chamber
DE3108333A1 (de) * 1981-03-05 1982-09-16 Schneider Gmbh & Co, 5020 Frechen Ausbildung eines uebergangs zwischen rohren, insbesondere kanalrohren, vorzugsweise aus steinzeug, unterschiedlicher durchmesser
EP0670395A2 (fr) * 1994-03-03 1995-09-06 H. Niemeyer Söhne GmbH & Co. KG Elément bas pour puits
EP0899387A1 (fr) * 1997-08-28 1999-03-03 Jens Walter Procédé de rénovation de la base des puits de regard

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1229497A (fr) * 1968-10-22 1971-04-21
GB1471862A (en) * 1974-06-06 1977-04-27 Molyneux Ltd Manholes for drainage systems
DE2509909A1 (de) * 1975-03-07 1976-09-16 Andreas Weiss Verfahren zum erstellen einer rinnensohle in einem revisionsschacht und platte zur durchfuehrung des verfahrens
GB2035413A (en) * 1978-09-05 1980-06-18 Reed International Ltd Drainage inspection chamber
DE3108333A1 (de) * 1981-03-05 1982-09-16 Schneider Gmbh & Co, 5020 Frechen Ausbildung eines uebergangs zwischen rohren, insbesondere kanalrohren, vorzugsweise aus steinzeug, unterschiedlicher durchmesser
EP0670395A2 (fr) * 1994-03-03 1995-09-06 H. Niemeyer Söhne GmbH & Co. KG Elément bas pour puits
EP0899387A1 (fr) * 1997-08-28 1999-03-03 Jens Walter Procédé de rénovation de la base des puits de regard

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008011436A1 (de) * 2008-02-27 2009-09-03 Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg Kunststoff-Reduzierstück und mit wenigstens einem derartigen Reduzierstück ausgestattetes Schachtbodenstück
EP2107174A3 (fr) * 2008-04-01 2012-02-22 Uponor Innovation AB Puits et fond de puits
DE102009037042A1 (de) * 2009-08-13 2011-02-17 Hegler Plastik Gmbh Schacht, insbesondere Kontroll- und Spül-Schacht für Abwasser mit einem Fließ-Gerinne und Platte für ein Fließ-Gerinne
CN112832292A (zh) * 2021-04-16 2021-05-25 苏州建筑工程集团有限公司 装配式检查井

Also Published As

Publication number Publication date
NL1029091C2 (nl) 2006-11-30

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