EP4079983A1 - Hebestation mit verstärktem boden - Google Patents

Hebestation mit verstärktem boden Download PDF

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Publication number
EP4079983A1
EP4079983A1 EP22161893.7A EP22161893A EP4079983A1 EP 4079983 A1 EP4079983 A1 EP 4079983A1 EP 22161893 A EP22161893 A EP 22161893A EP 4079983 A1 EP4079983 A1 EP 4079983A1
Authority
EP
European Patent Office
Prior art keywords
tank
peripheral wall
lifting station
central axis
base
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.)
Pending
Application number
EP22161893.7A
Other languages
English (en)
French (fr)
Inventor
Hugues RAULT
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.)
Innoclair SAS
Original Assignee
Innoclair SAS
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 Innoclair SAS filed Critical Innoclair SAS
Publication of EP4079983A1 publication Critical patent/EP4079983A1/de
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/22—Adaptations of pumping plants for lifting sewage

Definitions

  • the field of the invention is that of the design and manufacture of wastewater treatment equipment. More specifically, the invention relates to a lifting station for a sewerage network, of the type comprising a prefabricated tank intended to be buried, and a pump intended to take place in the tank.
  • Lifting station tanks conventionally have a bottom and a peripheral wall which extends from the bottom to an opening.
  • Such reservoirs take for example a cylindrical shape of revolution.
  • a lifting pump takes place at the bottom of the tank and pumps the collected water.
  • a lifting station tank can be built directly on its installation site, and is for example bricked.
  • a lifting station tank can also be prefabricated. That is, this tank is factory-made and designed so that it can be moved to the site of its installation. This method of manufacture and installation is more economical and quick to carry out.
  • the installation of a lifting station then involves digging a pit at least to the dimensions of the tank, then inserting the prefabricated tank into the pit. Next, backfilling material is poured around the tank to wedge it inside the pit.
  • These prefabricated tanks can be made of concrete or plastic (for example polyethylene or polyester resin reinforced with fiberglass).
  • Precast plastic tanks are easier to move and install than their concrete counterparts. They nevertheless have drawbacks inherent in the nature of the constituent material.
  • a first problem relates to the external pressure to which these reservoirs may be subjected.
  • the pit accommodating the reservoir may be submerged and, in this case, the submersion waters exert pressure on the reservoir liable to deform it, or even to lift it.
  • a particular disadvantage relating to this problem resides in the deformation of the bottom of the tank. As the pump of the lifting station rests on the bottom of the tank, this deformation causes the pump to move, which can cause damage to the lifting station.
  • the pump is often inserted inside a tank via guides descending inside the tank, and the pump is coupled to a water evacuation network via a pipe penetrating inside the tank and descending to this pump.
  • a second problem relates to a phenomenon of the unearthing of reservoirs.
  • Plastic tanks are particularly prone to this problem.
  • the filling is adapted to improve their maintenance buried.
  • the tank inserted into the pit can be wedged and held in position by means of the casting of a belt of concrete, and possibly the casting of a concrete slab above the tank.
  • the object of the invention is in particular to overcome the drawbacks of the prior art.
  • the object of the invention is to propose a sewerage network lifting station which is easy to install and which has a robust design, in particular in that it can withstand the stresses generated by a submersion situation.
  • the invention also aims to provide such a station whose reservoir has the ability to withstand the pressures to which it may be subjected, and which has the ability to remain at the bottom of a pit in which it is buried.
  • plastic material is understood to mean, for example, materials of the polyethylene or polypropylene type or even a hardened plastic resin reinforced with a reinforcement, for example with glass fibers or carbon fibers.
  • the plastic tank is prefabricated in the factory and light compared to a prefabricated concrete tank.
  • the lifting station has a reinforced bottom able to better withstand the stresses exerted on the bottom when the lifting station is installed, and improving the ability of the tank to remain buried despite external stresses likely to cause raising the tank from the pit in which it was buried.
  • This design makes it possible to reduce the impact of the forces which are likely to deform the bottom of the tank of the lifting station.
  • the filling materials used to fill the pit in which the tank was positioned exert a force against the wall of the base, towards the bottom, and reinforce the maintenance of the tank in the pit.
  • the partition has a central stiffening rib having an outer edge extending from the bottom away from the central axis as far as the peripheral wall.
  • stiffening ribs contribute to the diffusion of the stresses exerted on the bottom in the direction of the peripheral wall.
  • stiffening ribs improve the structural strength of the partition extending from each indentation.
  • the peripheral wall has at least one longitudinal protrusion extending parallel to the central axis from a lower end to an upper end of the peripheral wall, the longitudinal protrusions having a longitudinal flattening which extends from the lower end to the upper end of the peripheral wall.
  • these longitudinal protrusions can be easily drilled to be crossed by a pipe whose passage through the peripheral wall by the longitudinal flat can be effectively sealed using a seal, the surface crossing being flat.
  • the peripheral wall has two main longitudinal protrusions above the indentations, the edge of the central stiffening rib which extends from the indentation being connected to the overlying main longitudinal protrusion.
  • the peripheral wall has two intermediate longitudinal protrusions, the longitudinal protrusions being regularly distributed around the peripheral wall, and the tank has for each intermediate longitudinal protrusion a stiffening rib connecting the intermediate longitudinal protrusion to the basement.
  • the overall resistance of the tank is particularly improved.
  • the upper frustoconical portions have the function of forming faces against which the filling material, used to fill the pit in which the tank is buried, comes to rest and exerts a force in the direction of the bottom, thereby improving the maintenance of the tank. at the bottom of the pit.
  • the corrugations thus reinforce the capacity of the tank to be held effectively in place in the place where it is buried.
  • the upper tapered portion extends over a lower height along the central axis than the lower tapered portion.
  • the angle formed by the upper frustoconical portion with a horizontal plane, in a sectional view, is smaller than that formed by the lower frustoconical portion with a horizontal plane. This reinforces the capacity of the upper frustoconical portions to improve the maintenance of the tank at the bottom of the pit, by means of the filling material, while the lower frustoconical portion has the function of spacing the upper frustoconical portions and of providing a volume of significant reception above the upper tapered portions.
  • the tank comprises an internal ballast taking place in the base, the internal ballast having a pump reception reservation on the central location of the bottom.
  • the tank has a greater capacity to remain buried, thanks to its ballast, and the installation of the ballasted tank proves to be particularly simple. Indeed, in a situation where a concrete surrounding of a tank according to the prior art is necessary, the tank according to the invention may not require it.
  • the reserve concentrates the water collected in the tank at the level of the lifting pump.
  • the internal ballast is molded in the base.
  • the internal ballast then takes on an optimized shape above the bottom and in the base.
  • the lifting station comprises a manhole raiser, the raiser having a complementary threaded cylindrical body for screwing an internal thread presented by the tank at its opening.
  • the cylindrical body has predetermined drilling locations, these locations having recesses each comprising a flat face set back from an external thread presented by the threaded cylindrical body.
  • pipes can be coupled to the tank through these drilling locations, while having an effective seal because the drilling locations have a flat face to be effectively sealed.
  • the water drainage networks being, according to the regulations in force, at predetermined depths in relation to the surface of the ground, then the presence of the drilling locations along the cylindrical body of the manhole extension allows a connection from the drainage network to the lifting station tank.
  • the lifting station comprises a reinforcement plate coupled to an underside of the bottom of the tank.
  • This reinforcing plate participates in reinforcing the bottom against the stresses liable to deform the latter.
  • This reinforcing plate can take the shape of the bottom, or take the shape of a disk.
  • the reinforcing plate can be coupled for example by welding or by gluing.
  • a sewerage network lifting station 1 With reference to figure 1 and 2 , a sewerage network lifting station 1 according to the invention is shown.
  • Station 1 includes a tank 2 which is designed to be buried.
  • This reservoir 2 is intended to collect water to allow it to be returned to a height greater than that at which it is collected.
  • the reservoir 2 is molded from a plastic material, and is preferably made of polyethylene.
  • Station 1 comprises for this purpose a pump 3 which is intended to take place in tank 2.
  • the tank 2 has a bottom 21, a peripheral wall 23, and an opening 24.
  • the peripheral wall 23 extends along a central axis C ( figure 5 ).
  • tank 2 also has a base 22 which incorporates bottom 21 of tank 2.
  • the peripheral wall 23 extends from the base 22 in the direction of the opening 24.
  • the peripheral wall 23 adopts a shape having a cross section at the essentially oval central axis C, this shape being able to fit into a cylinder of revolution.
  • a water supply pipe 10 to be raised is shown.
  • This pipe 10 opens inside the tank 2. Through this pipe 10, water to be lifted flows inside the tank 2.
  • the pump 3 takes place in the tank 2 on a central location of the bottom 21.
  • the pump 3 is intended to be centered on the central axis C.
  • Station 1 also includes a pipe 31 for lifting water which extends from pump 3, parallel to the central axis C then which opens outside of reservoir 2.
  • Water to be lifted thus flows from the pipe 10 and is collected in the tank 2, where the pump 3 sucks them up and sends them outside the tank via the conduit 31.
  • Reservoir 2 is described in more detail below with reference to the figure 1 , 2 , 3 , 5 , and 6 .
  • tank 2 comprises a base 22 which integrates the bottom 21 of tank 2.
  • This base 22 has a frustoconical shape whose section tapers from the bottom 21 of the reservoir 2 to the peripheral wall 23 .
  • this base 22 comprises a cylindrical bottom part of revolution, and a top part which extends from the bottom part to the peripheral wall 23, the top part being frustoconical and having a greater height than the bottom part.
  • the base has a frustoconical shape
  • a minority portion of the base may not adopt the general frustoconical shape of the base.
  • the bottom 21 has two notches 211.
  • These two notches 211 are diametrically opposed with respect to the central axis C. Each of these notches 211 delimits a hollow which is open towards the outside of the reservoir 2.
  • These notches 211 have a trapezium shape whose small base is directed towards the central axis C.
  • the bottom 21 has side portions 212 which frame the indentations 211 by connecting them to a non-indented periphery of the bottom 21.
  • station 1 also comprises a reinforcement plate 8 which is intended to be coupled to an underside of bottom 21 of tank 2.
  • the plate 8 has the same shape as the bottom 21.
  • the plate 8 has two recesses 81 set back from an outer contour 80 of the plate 8, these recesses 81 corresponding to the indentations 211 of the bottom 21.
  • the plate 8 also comprises two lateral parts 82 which connect the recesses 81 to the periphery external 80.
  • Plate 8 is coupled to bottom 21 by gluing or welding. Welding can be carried out over the entire periphery of plate 8.
  • This plate 8 is advantageously made of polyethylene and has a thickness similar to that of the bottom 21.
  • the peripheral wall 23 and the bottom 21 have a thickness of 8 mm to 15 mm
  • the plate 8 can also be made of reinforced two-layer polyethylene and have a honeycomb structure.
  • the base 22 has a partition 221 for each notch 211. These partitions 221 extend from the notches 211 in the direction of the peripheral wall 23 while widening with respect to the central axis C.
  • the partitions 221 extend in the direction of the peripheral wall 23 widening with respect to the C axis.
  • the partitions 221, according to the present embodiment extend while widening, presenting a first face 2211 and a second face 2212.
  • the first panel 2211 extends from the bottom 21 and is perpendicular to the bottom 21.
  • the second pan 2212 extends from the first pan 2211 while being oriented at an angle not relative to the first pan 2211.
  • the second pan 2212 extends in particular obliquely at an angle of 45° relative to the first pan 2211.
  • This design allows the stresses exerted on the bottom 21 to be redirected and to propagate in the direction of the peripheral wall 23 of the tank 2 via the notches 211 and the partitions 221.
  • the first panel 2211 of each partition 221 is intended to extend vertically or essentially vertically following the installation of the reservoir 2. The redirection of the stresses is thereby optimized.
  • the partition 221 has a central rib 222 for stiffening.
  • This central stiffening rib 222 has an outer edge 2221 which extends from the bottom 21 away from the central axis C of the peripheral wall 23 .
  • the central stiffening rib 222 is positioned centrally with respect to the notch 211
  • the partition 221 also has two lateral ribs 224 which frame the central rib 222 for stiffening.
  • peripheral wall 23 is described with reference to the figures 1 to 3 , and 5.
  • the peripheral wall 23 has, along the central axis C, a succession of corrugations 5.
  • corrugations 5 The objective of these corrugations 5 is to structurally reinforce the reservoir 2 and to improve the capacity of the reservoir 2 to remain buried, going against forces liable to unearth the reservoir 2 (for example under the effect of the thrust of Archimedes when the pit where tank 2 is buried is submerged, or quite simply in the presence of a permanent or temporary water table).
  • a bead 53 is inserted between the upper tapered portions 51 and the lower tapered portions 52.
  • the upper tapered portions 51 form an angle A with a plane orthogonal to the central axis C
  • the lower tapered portions 52 each have an angle B with a plane orthogonal to the central axis C, angle A being strictly less than angle B.
  • the upper tapered portions 51 extend along the central axis C over a lower height than the lower tapered portions 52.
  • the peripheral wall 23 also has longitudinal projections 4 which extend parallel to the central axis C. These longitudinal projections 4 extend more precisely radially outwards and from the peripheral wall 23 .
  • These longitudinal projections 4 extend from a lower end 231 of the peripheral wall 23 to an upper end 232 of the peripheral wall 23 .
  • the longitudinal projections 4 each have a longitudinal flat 40 which extends from the lower end 231 to the upper end 232 of the peripheral wall 23 .
  • these longitudinal projections 4 are four in number and are regularly distributed around the peripheral wall 23.
  • the partitions 221 each have a central stiffening rib 222 centered on the notch 211.
  • the outer edge 2221 of the central stiffening rib 222 extends from the notch 211 by connecting to the main longitudinal protrusion 41 which is overlying.
  • tank 2 has an intermediate stiffening rib 223 which connects intermediate longitudinal protrusion 42 to base 22.
  • the tank 2 also includes an internal ballast 6 which takes place in the base 22.
  • This internal ballast 6 has a reservation 60 for receiving the pump 3 on the central location of the bottom 21.
  • This reception reservation 60 is in particular delimited by an internal wall 61 of the ballast 6.
  • the reservation 60 in this case has a frustoconical shape centered on the central axis C, the section of which tapers off in the direction of the bottom 21.
  • the internal ballast 6 is molded in the base 21.
  • This ballast 6 can for example be formed of concrete.
  • the ballast 6 takes the form of the volume delimited by the base 21.
  • the ballast 6 is formed by a sealed chamber capable of being filled with a liquid.
  • This sealed chamber is more precisely delimited by an internal wall of the tank 2 in cooperation with an external wall of the base 21.
  • An opening that can be closed in a sealed manner is then presented by the station 1 to fill the sealed chamber with liquid.
  • the opening can be presented directly at the level of the base 21 or else be offset at the top of the station using a tube going up inside the tank from the base 21.
  • the lifting station 1 comprises a riser 7 for the eyes.
  • a manhole is intended to be coupled to the opening 24 of the tank 2.
  • the raiser 7 of manhole can be installed on tank 2 to look up.
  • the manhole raiser 7 has a threaded cylindrical body 71 which is complementary in screwing to an internal thread presented by the tank 2 at its opening 24.
  • the screwing depth of the riser 7 in the tank 2, along the central axis C, can thus be adjusted according to the level of the surface.
  • the cylindrical body 71 of the riser 7 of the view has locations 72 of predetermined drilling.
  • the water supply pipe 10 passes through one of the locations 72 of predetermined drilling.
  • These locations 72 each have a hollow comprising a flat face 721 which is set back from an external thread presented by the threaded cylindrical body 71 .

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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)
EP22161893.7A 2021-04-23 2022-03-14 Hebestation mit verstärktem boden Pending EP4079983A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2104235A FR3122194B1 (fr) 2021-04-23 2021-04-23 Station de relevage à fond renforcé

Publications (1)

Publication Number Publication Date
EP4079983A1 true EP4079983A1 (de) 2022-10-26

Family

ID=76159601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22161893.7A Pending EP4079983A1 (de) 2021-04-23 2022-03-14 Hebestation mit verstärktem boden

Country Status (2)

Country Link
EP (1) EP4079983A1 (de)
FR (1) FR3122194B1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5816510A (en) * 1994-08-02 1998-10-06 Environment One Corporation Grinder pump station
CN205116384U (zh) * 2015-10-21 2016-03-30 北京华凌时代科技发展有限公司 智能一体化预制泵站

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5816510A (en) * 1994-08-02 1998-10-06 Environment One Corporation Grinder pump station
CN205116384U (zh) * 2015-10-21 2016-03-30 北京华凌时代科技发展有限公司 智能一体化预制泵站

Also Published As

Publication number Publication date
FR3122194A1 (fr) 2022-10-28
FR3122194B1 (fr) 2024-02-16

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