EP1552070A1 - Procede de production d'un element de plancher de fosse en plastique - Google Patents

Procede de production d'un element de plancher de fosse en plastique

Info

Publication number
EP1552070A1
EP1552070A1 EP03766784A EP03766784A EP1552070A1 EP 1552070 A1 EP1552070 A1 EP 1552070A1 EP 03766784 A EP03766784 A EP 03766784A EP 03766784 A EP03766784 A EP 03766784A EP 1552070 A1 EP1552070 A1 EP 1552070A1
Authority
EP
European Patent Office
Prior art keywords
shell part
channel
shell
pit
floor element
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Withdrawn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
EP03766784A
Other languages
German (de)
English (en)
Inventor
Wilfried Spekhorst
Ole Heidemann Jensen
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.)
Wavin BV
Original Assignee
Wavin 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 Wavin BV filed Critical Wavin BV
Publication of EP1552070A1 publication Critical patent/EP1552070A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/124—Shaft entirely made of synthetic 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

Definitions

  • the present invention relates to a method for producing a plastic pit-floor element for a pit, in particular an inspection pit, which pit-floor element has a connection feature, or in particular a plurality of connection features, for one or more lines.
  • the invention relates to a floor element for a pit which is provided at the top side with a manhole which can be closed off by an associated cover or grate and which also has a substantially vertical shaft between the said manhole and the floor element.
  • connection features of a plastic pit-floor element in particular have to be matched to the diameter (s) and the position and orientation of the line(s) to be connected to the floor element.
  • the producers of pit-floor elements of this type are required to be able to supply tailor-made pit-floor elements.
  • products offer some 150 different versions.
  • a known method involves assembling the pit-floor element mainly by means of manual work by forming a channel in a shaft element with an integral bottom wall with the aid of semicircular pipe sections and fitting the adjoining conical top surfaces by means of a large number of panel pieces made from plastic.
  • the panel pieces in question are tailor made by hand and then secured in place by means of welded j oints . In practice, this means that the production of a single pit-floor element may require as much as 10 man hours .
  • the invention achieves this object by means of a method which comprises at least the steps of : providing a plastic shell part having a top surface which comprises at lea st one channel which is open at the top and top surfaces which adj oin the top edge of the channel, - providing a plastic shaft part having an annular wall, positioning the shell part in the shaft part, fixing the shell part to the annular wall of the shaft part , - forming at least one opening in the shaft part and, aligned with this , an opening in the shell
  • the invention therefore provides for the production of a shell part and, separately, a shaft part, after which the shell part is positioned and fixed in the shaft part.
  • openings are formed at these locations both in the shaft part and in the shell part, preferably wit ⁇ i the aid of a drill, for example a tubular hole borer with cutting means at the end.
  • the assembly comprising shell part and pit-floor element is placed onto a turntable and oriented with respect to a drilling installation arranged alongside the turntable, with a drill which can move to and fro in a rectilinear guide.
  • a pipe part is positioned in each pair of aligned openings, this pipe part then being matched, at the inwardly facing end, to the shell part and being fixed in a watertight manner thereto, while each pipe part is also joined in a watertight manner to the shaft part.
  • each pipe part may project outside the shaft part in order for a line to be connected to this projecting end.
  • a pipe part ends in the vicinity of the annular wall of the shaft part, where it is provided with an insertion socket or other coupling means for the line which is to be connected.
  • the method according to the invention enables the producer of the pit-floor element to produce a large number of different pit-floor elements using a relatively small number of different shell parts, shaft parts and operations.
  • the producer can on demand produce different shell parts having a channel in which the diameter of the channel is matched to the particular requirements and corresponds to standard line diameters, for example 110, 160, 200, 250 or even 500 millimetres .
  • a shell part is provided having a channel which extends from the centre of the shell part to the outer periphery thereof, and the method also comprises the step of forming an opening in the shaft part at the level of the end of the channel which adjoins the outer periphery.
  • An embodiment of the shell part of this nature has the advantage that the channel which is open at the top continues all the way to the annular wall of the shaft part, which is advantageous in particular if the channel is used to discharge liquid via a line which is to be connected to the channel at that location, since the drainage capacity is then high and the risk of blockage low.
  • the shell part at the end of the channel which adjoins the outer periphery of the shell part, to form an end wall which extends substantially transversely with respect to the channel, in which case the method also comprises the step of forming an opening in each end wall or of removing the end wall, preferably prior to the positioning of the shell part in the shaft part.
  • the shell part forms an open end of the channel at that end of the channel which adjoins the outer periphery.
  • a shell part which forms a channel with two ends adjoining the outer periphery of the shell part is produced.
  • the channel is then used in particular as a through-passage (drainage) channel.
  • liquid which flows in from one or more other lines which are to be connected to the pit and/or via a grate in the top side of the pit can also enter this channel via the shell part.
  • the top surfaces of the shell part which adjoin the channel it is preferable for the top surfaces of the shell part which adjoin the channel to be substantially conical and for these top surfaces to slope downwards towards the channel.
  • the shell part forms one or more substantially horizontal surface parts which can be walked on, for example along the outer periphery.
  • floor- parts which can be walked on are arranged above the shell part.
  • the opening for the pipe part which has been formed in the shell part is such that the pipe part is a continuation of the channel.
  • the opening which has been formed for the pipe part is arranged in such a manner that the lowermost point of the pipe part is located at a lower level than the lowermost point of the shell part, and it is desirable for the pipe part to be provided, at the inwardly projecting end, with a closure wall which adjoins the shell part and thereby closes off the corresponding end of the pipe part.
  • the closure wall is in the form of a part of a hemisphere.
  • the shell part is provided using a moulding process by means of a suitable mould.
  • the shell part prefferably be provided using a rotational moulding process. It is preferable to use a rotational mould by means of which two shell parts whose outer peripheries adjoin one another are produced simultaneously, which shell parts are then separated from one another. The mould then has a single mould cavity into which the plastic is introduced.
  • this mould is designed in such a way that by positioning inserts it is possible to make shell parts with different channels, so that the producer only needs a small number of moulds .
  • the shaft part has an integral bottom wall and the shell part is positioned and fixed in the shaft part which is open at the top.
  • the shaft part of the floor element includes only the annular wall, and a separately produced bottom wall, preferably made from plastic, is secured to the annular wall beneath the shell part.
  • plastic support elements are provided between the shell part and the bottom wall, which support elements are preferably formed integrally on the bottom wall.
  • the shaft part is preferable for the shaft part to be designed at its top side for a subsequent shaft part to be positioned on top of it, so that the pit can reach the desired height.
  • the channel in an embodiment as a through-flow pit, there is provision for the channel to adjoin the outer periphery of the shell part at all ends and for the opening for one pipe part to be arranged in such a manner that the lowermost point thereof is at a higher level than the lowermost point of the channel.
  • the line which is to be connected is then used as a feed line and the channel as a through-flow channel.
  • Fig. 1 shows a vertical section through a floor element during production using the method according to the invention
  • Fig. 2 shows a plan view of the floor element shown in Figure 1
  • Figs. 3a-c respectively show a plan view of, a vertical section through and a further vertical section through the shell part of the pit-floor element shown in Figures 1 and 2,
  • Fig. 4 shows a vertical section through another floor element during its production using the method according to the invention
  • Fig. 5 shows the floor element from Figure 4 in plan view
  • Figs. 6a-c respectively show a plan view of, a vertical section through and a further vertical section through the shell part of the pit-floor element shown in Figures 4 and 5.
  • Figure 1 shows a vertical section through a plastic pit-floor element 1 for a pit, in particular an inspection pit, which pit-floor element ultimately is to receive two connection features for two lines.
  • the pit-floor element 1 is shown in an intermediate state which occurs during production using the method according to the invention.
  • Figure 2 shows the floor element 1 from Figure 1 in plan view.
  • a shell part 2 which is shown in detail in Figures 3a-c in the state prior to assembly of the floor element, has been produced in a suitable mould using a rotational moulding process.
  • the shell part 2 has a top surface which forms a channel 3 which is open at the top, as well as top surfaces 4 which adjoin the top edge of the channel 3. These top surfaces 4 are substantially conical, so that liquid from these top surfaces 4 enters the channel 3.
  • the shell part 2 is in fact a dimensionally stable plastic panel with a specific shape with a wall thickness which makes the shell part 2 at least self-supporting, and preferably suitable for walking on.
  • the shell part 2 has a circular outer circumference 5 with, in this example, a raised circumferential edge 6.
  • the channel 3 lies substantially radially in the circular shell part 2 and at one end adjoins the outer circumference 5 of the shell part 2. The other end of the channel 3 is located in the central region of the shell part 2.
  • the shell part 2 At the end of the channel 3 which adjoins the outer circumference of the shell part, the shell part 2 forms an end wall 7 which extends substantially transversely with respect to the channel 3 and the upper edge of which forms a part of the circular circumferential edge 6.
  • the above-described shell part 2 is positioned in a substantially cylindrical plastic shaft part 10 with an annular wall 11 and in this example an integral bottom wall 12.
  • the annular wall 11 is provided with ribs 13 on its outer circumference for reinforcement purposes .
  • the shell part 2 is positioned in the shaft part 10 from above and is then fixed in place, in this example along the circumferential edge 6 which adjoins the inner circumference of the shaft part. It is preferably fixed in place using a welding process.
  • the openings are advantageously formed using an elongate hole borer in the form of a tube with a cutting edge or toothing at the end side.
  • the assembly of shaft part and shell part is arranged on a turntable, so that the desired positioning of the assembly with respect to the drill can be adjusted, the drill then being held in such a manner that it can move to and fro in a guide .
  • the floor element 1 provision is made for a line with a diameter of 200 millimetres to be connected at an angle with respect to the straight channel 3, as shown in Figure 2.
  • the channel 3 likewise has this same diameter of 200 mm.
  • the opening for the pipe part 20 which has been formed in the shaft part 10 and shell part 2 is arranged in such a manner that the lowermost point of the pipe part 20 is located at the same level as the lowermost point of the channel 3. This prevents disturbance to the flow of liquid.
  • an opening (not shown) is drilled at the height of the end wall 7 of the shell part 2, preferably with a diameter matched to the diameter of the channel 3. This opening is drilled through both the shaft part 10 and the end wall 7.
  • a pipe part is positioned and fixed to the shell part and the shaft part, and if appropriate this pipe part may be designed with an insertion socket or similar coupling for another line which is to be connected to the pit-floor element 1.
  • the channel 3 can serve as a through-flow channel.
  • aligned openings can be formed in the shaft part and the shell part 2 in the manner described above, after which a pipe part is fitted. If it is intended for liquid to flow into the pit via the line which is to be connected to the said pipe part, it is preferable for the lowermost point of the pipe part in question to be located above the lowermost point of the channel.
  • an opening is formed in the end wall 7 or the end wall is removed prior to the positioning of the shell part in the shaft part.
  • the end wall is absent and for the shell part at the end of the channel which adjoins the outer periphery to form an open end of the channel.
  • the shell part not to be provided with a channel, in which case the opening formed for the pipe part is arranged in such a manner that the lowermost point of the pipe part is at a lower level than the lowermost point of the shell part.
  • the pipe part is provided at the inwardly projecting end with a closure wall which adjoins the shell part and thereby closes off the corresponding end of the pipe part.
  • this closure wall is part of a hemispherical surface.
  • Figures 4-6 show a pit-floor element during its production and the associated shell part, largely corresponding to the pit-floor element shown in Figures 1-3.
  • the external diameter of the shell part 30 is identical to that of the shell part 2.
  • a difference is that the channel 33 has a diameter of 250 millimetres.
  • openings can be formed in the manner described above and one or more pipe parts can be positioned therein, all this as a function of the intended connection options for the pit-floor element.
  • the channel in the shell part may also be of completely different design, for example, in the form of a straight channel which at both ends extends as far as the outer periphery of the shell part.
  • the embodiment shown offers a suitable universal starting point for a wide range of different pit-floor elements with different connection options.
  • the shell part could also be produced using a vacuum-moulding process or even by means of injection moulding.
  • a further alternative is the lay-up method for glass fibre-reinforced shell parts .
  • the shaft part prefferably includes only the annular wall and for a bottom wall, preferably made from plastic, to be secured to the annular wall beneath the shell part.
  • plastic support elements for example ribs, are provided between the shell part and the bottom wall, which support elements are preferably formed integrally on the bottom wall.
  • the shell parts 2, 30 shown are designed for a subsequent shaft part to be positioned on top of them, so that it is possible to produce a pit of the desired height.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sewage (AREA)

Abstract

La présente invention concerne un procédé de production d'un élément de plancher de fosse en plastique, en particulier de fosse de visite. L'élément de plancher de fosse de l'invention comprend un ou plusieurs éléments de raccordement destinés à un ou plusieurs conduits. Selon le procédé de l'invention, on forme une partie coque en plastique comportant une surface supérieure comprenant au moins un canal ouvert vers le haut, et des surfaces supérieures adjacentes au bord supérieur du canal ; on forme une partie puits en plastique comportant une paroi annulaire ; on place la partie coque dans la partie puits ; on fixe la partie coque sur la paroi annulaire de la partie puits ; on forme au moins une ouverture dans la partie puits et, en alignement sur ladite ouverture, une ouverture dans la partie coque ; et on met en place une partie tuyau, que l'on raccorde de manière étanche à l'eau, dans les ouvertures alignées, de façon que l'extrémité dirigée vers l'intérieur de la partie tuyau est adjacente à la partie coque et forme un joint étanche avec cette dernière, et que l'autre extrémité du tuyau s'étend au moins aussi loin que la partie puits, où elle forme un élément de raccordement destiné au raccordement d'un conduit.
EP03766784A 2002-08-06 2003-08-04 Procede de production d'un element de plancher de fosse en plastique Withdrawn EP1552070A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1021221 2002-08-06
NL1021221A NL1021221C2 (nl) 2002-08-06 2002-08-06 Werkwijze voor de vervaardiging van een kunststof putbodemelement.
PCT/NL2003/000558 WO2004013421A1 (fr) 2002-08-06 2003-08-04 Procede de production d'un element de plancher de fosse en plastique

Publications (1)

Publication Number Publication Date
EP1552070A1 true EP1552070A1 (fr) 2005-07-13

Family

ID=31492949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03766784A Withdrawn EP1552070A1 (fr) 2002-08-06 2003-08-04 Procede de production d'un element de plancher de fosse en plastique

Country Status (4)

Country Link
EP (1) EP1552070A1 (fr)
AU (1) AU2003254971A1 (fr)
NL (1) NL1021221C2 (fr)
WO (1) WO2004013421A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022616A1 (de) * 2009-05-26 2010-12-02 Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg Schachtunterteil
DE202012101644U1 (de) * 2012-05-04 2013-08-07 Rehau Ag + Co Schachtunterteil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1485757A (en) * 1974-08-28 1977-09-14 Yorkshire Imp Plastics Ltd Drainage access vessel
DE29621086U1 (de) * 1996-12-05 1997-02-13 Hüttl Kanaltechnik GmbH, 35435 Wettenberg Verkleidung der Anbohröffnung eines Schachtes
DE19747863A1 (de) * 1997-10-30 1999-05-06 Ralph Peter Dr Ing Hegler Spül- und Kontroll-Schacht für Flüssigkeitsleitungen und Schacht-Abschnitt hierfür
NL1010902C2 (nl) * 1998-12-24 2000-06-27 Wavin Bv Putbodemelement.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004013421A1 *

Also Published As

Publication number Publication date
NL1021221C2 (nl) 2004-02-10
AU2003254971A1 (en) 2004-02-23
WO2004013421A1 (fr) 2004-02-12

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