Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D88/00—Large containers
  • B65D88/02—Large containers rigid
  • B65D88/06—Large containers rigid cylindrical
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D88/00—Large containers
  • B65D88/76—Large containers for use underground

Definitions

• the present invention relates to a tank intended to be buried to contain, in particular, wastewater.
• the targeted applications are devolved to the construction industry, agriculture, industry.
• a tank for such an application is often constructed of polyester or medium density polyethylene (MDPE). Such a tank does not support the burial, since it can be deformed because of insufficient rigidity, when it is buried when it is not completely filled.
• MDPE medium density polyethylene
• the object of the invention is therefore to provide a tank that withstands the pressure that can exert the material surrounding the tank after burial.
• a vessel intended to be buried to contain, in particular, wastewater the vessel having an envelope comprising an upper portion and a lower portion, the vessel being internally provided with a structure of reinforcing means the shell so that it can withstand the pressure exerted by the burial material when the tank is buried and is not completely filled;
• the reinforcing means comprises voussoirs bearing against the upper part and the tank incorporates means to resume the support efforts of the voussoirs to postpone them on the bottom of said tank.
• each voussoir comprises an arch portion wall adapted to fit internally a rounded wall of the upper part and the means for taking up the forces consist of bars, tubes.
• a gap separates the upper part and the lower part, and the reinforcing means comprises wedges, the segments, the wedges being provided respectively with heels which are inserted in the interstice, the voussoirs, the shims are connected, at least for some of them, through connecting bars
• the voussoirs are secured to the envelope and strengthen the upper part, the wedges are secured to the envelope and strengthen the sides of the tank.
• the connecting bars return forces applied externally on the envelope by the burial material to other segments, other wedges, when the tank is buried.
• the tank comprises in its bottom, a permeable floor, intended to support a filtering means of liquid capable of being introduced into said tank, the floor being connected to voussoirs, holds, by the intermediary of connecting bars.
• the floor takes up the vertical component forces transmitted by the voussoirs and wedges, to prevent the collapse of the tank when buried.
• the floor consists of a plurality of elements placed juxtaposed on the bottom and being disjoint.
• the floor comprises two end elements placed on either side of at least one intermediate element, the end element being provided with a boss in which a housing is formed. to receive the end of a link bar, the element intermediate being provided respectively with two bosses in which are formed two housing for receiving the ends of two connecting bars.
• the arch portion wall is surmounted by a plate-shaped wall whose long length is arranged perpendicular to the median plane of the wall to locally support the rim of an opening of access of the tank, the arch portion wall being extended, opposite the plate, and in its dorsal portion by a heel adapted to be inserted into the gap provided between the upper part and the lower part of the housing, a first housing being formed in the wall, through its inner face, being rotated horizontally, to receive an end of a connecting bar, a second housing being formed in the arch portion wall, to through its inner face, facing downwards, to receive one end of another connecting bar.
• each shim consists of a block delimited on one side by two lateral facets, a lower facet intended to be turned downwards and delimited on the other side by a heel adapted to be inserted into the gap provided between the upper part and the lower part of the casing, two housings being respectively formed in the two lateral facets to receive one end of a connecting bar, a third housing being formed in the lower facet, to receive an end of a third link bar.
• the housings made in the floor element and the second housing made in the voussoir are respectively connected to through vents, the corresponding connecting bars being hollow so that the part located under the floor can be broken down.
• the housing formed in the floor element is connected to a vent opening, the connecting bar between the floor element and the wedge and the connecting bars between the wedge and the voussoir are hollow, housing made in the hold are open.
• bridging is formed locally in the gap between the upper part and the lower part to strengthen their connection and to wedge laterally the voussoirs and wedges.
• the vessel is provided with an outer peripheral belt intended to form a rigid connection structure between the two parts.
• the upper part, the lower part, the belt consist of the same continuous wall.
• the belt consists of a first semicircle loop which extends the wall of the upper part, a short straight portion which is extended by a second loop in a larger semi-circle, a straight portion, another loop in a semicircle, another short straight portion which is extended by a fourth loop in a semicircle which is connected to the wall of the lower part, the first loop and the fourth loop are disjointed sparingly to spare the gap between the two parts.
• the reinforcing means comprises posts secured by their ends in housings respectively formed in the upper wall of the tank and in its bottom.
• the posts When the tank is raised by its upper wall, the posts work in traction to join the upper wall and the bottom of the tank. When the tank is buried, the columns work in compression so that the tank can withstand the load of the burial material on its upper wall. This charge is carried by the posts on the bottom of the tank.
• the reinforcing means comprises a beam secured to two opposite sides of the tank.
• This beam provides increased resistance to the collapse of the tank in its central part.
• a plate projects downwards so as to be able to bear against the bottom of the tank to reinforce its structure and to delimit two compartments in which two volumes of the filtration means, poles may be placed. protrude from the beam, in a direction opposite to the plate and whose free ends are fixed on the upper wall so that the beam can join the upper wall and the bottom of the tank to stiffen it.
• each voussoir comprises two rectilinear profiles abutting on the wall portion of arch.
• the voussoir supports laterally the upper wall of the tank. It is intended to be associated with a tank of relatively large capacity. According to an additional feature of the invention, the tank is provided with an outlet orifice for discharging the treated effluent to an authorized outlet.
• This tank is particularly suitable for irrigating the soil with drains.
• the bottom is perforated with a plurality of passages to allow the effluent to infiltrate, by gravity, the soil on which the tank rests.
• This tank is suitable for directly infiltrating the soil with the filtered effluent, when the soil allows it, and according to the legislation in force.
• the bottom consists of a component attached to the tank. Depending on whether the bottom is perforated or not, one can build a remote reject tank or a direct infiltration tank.
• the envelope is manufactured by a rotational molding process.
• the floor elements, voussoirs, wedges and connecting bars are manufactured by a rotational molding process.
• the rotational molding process uses a raw material capable of forming a polyethylene foam.
• FIG. . 1 represents a front view of a tank according to the invention
• FIG. 2 shows a front view in section of a tank according to the invention
• FIG. 3 is a sectional side view of a tank according to the invention
• FIG. 4 is a sectional view of a detail of a connecting belt between a lower part and an upper part of a tank according to the invention
• FIG. 5a shows a front view of a floor supporting a reinforcement means for a tank according to the invention
• FIG. 5b is a plan view of a floor supporting a reinforcement means for a tank according to the invention
• FIG. 1 represents a front view of a tank according to the invention
• FIG. 2 shows a front view in section of a tank according to the invention
• FIG. 3 is a sectional side view of a tank according to the invention
• FIG. 4 is a sectional view of a detail of a connecting belt between a lower part and an upper part of a tank according to the invention
• FIG. 5a shows
• FIG. 5c is a side view of a floor supporting a reinforcement means for a tank according to the invention
• FIG. 6a shows a front view of an end element of a floor for a tank according to the invention
• FIG. 6b is a plan view of an end element of a floor for a tank according to the invention
• FIG. 6c is a sectional side view of an end member of a floor for a tank according to the invention
• FIG. 7a shows a front view of an intermediate element of a floor for a tank according to the invention
• FIG. 7b is a plan view of an intermediate element of a floor for a tank according to the invention
• FIG. 7c shows a side view of an intermediate element of a floor for a tank according to the invention
• FIG. 7a shows a front view of an intermediate element of a floor for a tank according to the invention
• FIG. 7b is a plan view of an intermediate element of a floor for a tank according to the invention
• FIG. 7c shows a side
• FIG. 8a shows a front view of a voussoir for a tank according to the invention
• FIG. 8b shows a side view of a voussoir for a tank according to the invention
• FIG. 8c shows a dorsal view of a voussoir for a tank according to the invention
• FIG. 9a shows a side view of a shim for a tank according to the invention
• FIG. 9b is a plan view of a shim for a tank according to the invention
• FIG. 9c is a front view of a shim for a tank according to the invention
• FIG. 10 is a longitudinal sectional view of an alternative embodiment of a tank allowing the direct infiltration of the soil by a filtered effluent according to the invention
• FIG. 10 is a longitudinal sectional view of an alternative embodiment of a tank allowing the direct infiltration of the soil by a filtered effluent according to the invention
• FIG. 11 is a perspective view of an attached bottom for a tank according to the invention
• FIG. 12 is a view in longitudinal section and in perspective of the variant embodiment of a tank according to the invention
• FIG. 13 is a perspective view of an alternative embodiment of a voussoir for reinforcing the internal structure of a tank of relatively large capacity
• FIG. 14 is a cross-sectional and perspective view of a vessel of FIG. 10
• FIG. 15 is a perspective view of a beam to be secured in a tank according to the invention.
• the tank 100 shown in Figs. 1, 2 and 3 is intended to contain, in particular, wastewater for sanitizing, purifying or filtering.
• This tank is intended to be buried so that it can be concealed and to facilitate the collection by gravity sewage. Only access to the tank in the perspective of its maintenance is apparent at the end of its burial.
• the tank 100 thus makes it possible to collect the effluent, to treat it so that it can emerge through an outlet orifice to which is connected a pipe to transfer it, for example to a spreading drain.
• the envelope 110 thus comprises an upper portion 200, a lower portion 300 joined by a peripheral belt 400 located at mid-height of the tank and intended to form a rigid connection structure between the two parts.
• the upper part 200 consists of an upper wall 202 which extends at its periphery and downwards rounded walls 204 connecting to the belt 400.
• An access opening 206 inwardly of the tank is formed in the upper wall 202. This opening 206 can be closed by a cover 210.
• the lower part 300 consists of a parallelepiped-shaped bottom 310 which is surmounted at its periphery with rounded walls 304 connecting to the belt.
• Beads 220 are shaped recessed or raised in the wall of the upper part 200 and the lower part 300 to increase the rigidity of the structure of the casing 110 of the tank 100.
• the upper part 200, the belt 400 and the lower part 300 consist of the same continuous wall.
• the belt 400 is located outside the tank thus forming a protective belt of the tank. It has a first loop 401 in a semicircle which extends the wall of the upper part 200, a short straight portion 402 which is extended by a second loop 403 in a larger semi-circle, then a straight portion 404, another loop 405 in a semicircle, another short straight portion 406 which is extended by a fourth loop 407 in a semicircle which is connected to the wall of the lower part 300.
• the first loop 401 and the fourth loop 407 are disjoint and thus providing a gap I between the two parts 200 and 300 and whose utility is explained ci - after.
• These bridges P are located between reentrant portions of the first loop 401 and the fourth loop 407.
• the bottom 310 consists of a bottom wall 312 bordered vertically at its periphery with side walls 314 which are connected to the lower part 300. It is intended, as appears distinctly in FIG. 2, to receive a floor 500 provided, on the one hand, to support a filtration means, not shown, wastewater and, secondly, to hold a reinforcement means 600 of the structure of the envelope 110 of the tank 100.
• This wastewater can enter the tank through an inlet orifice 230 located in the upper part of the upper part 200 and emerge, after passing through the filter, through an outlet orifice 330 located in the bottom 310 to be evacuated through a pipeline to an authorized outlet.
• the bearing portion of this floor 500 which is intended to support the filter is permeable and is placed above the outlet orifice 330 so that the water filtered through this filter can flow through the floor and exit the vessel through the outlet port 330.
• the floor 500 consists of a plurality of elements 510 and 530 which rest on the bottom wall 312 as well as on a peripheral edge 318 joining the bottom 310 with the lower part 300, these elements being placed in a juxtaposed manner but without being contiguous.
• the central portion of the floor 500 forms a cuvette for capturing filtered water that can flow between gaps between two adjacent elements 510, 530.
• the floor view 500 shown in Figs. 2, 5a and 5b it consists of two end members 510a and 510b and at least one intermediate element 530 and here two intermediate elements 530a and 530b.
• the end element 510 is composed in Figs. 6, a wall 511 C-shaped locally defining the edge of the bowl and a bottom wall 512 partially forming the bottom of the bowl, this bottom wall 512 being joined to the wall 511 by walls of 513.
• Other walls 514 in the form of a spider protrude under the element 510 to form a wedging means thereof in the bottom of the tank and a means on which bears the floor element.
• the intermediate element 530 is composed in FIGS. 7 of two walls 531a and 531b disposed on either side of the intermediate element 530 locally defining the edge of the bowl and a bottom wall 532 forming part of the bottom of the bowl, the bottom wall 532 being joined to the walls 531a, 531b by side walls 533.
• Other walls 534 in the form of a spider protrude under the element 530 to form a wedging means thereof in the bottom of the tank and a means on which takes support of the floor element.
• the wedging means of the elements 510 and 530 cooperate with corresponding recesses 316 formed in the bottom wall 312 of the casing 110 to wedge the elements laterally when they are juxtaposed and to disjoin them and on which said elements also rest. .
• the reinforcement means 600 is designed to be secured, on the one hand, on the floor 500 and to be secured, on the other hand, with the upper part and the lower part to stiffen the structure of the envelope so that it can withstand the pressure exerted by the landfill material when the tank is buried and is not filled.
• the reinforcement means 600 consists of voussoirs 610, wedges 630, connecting bars 650 placed between these elements or between these elements and the floor 500.
• the voussoirs 610 are intended to bear against rounded walls
• the voussoir 610 comprises a wall 611 in an arch portion adapted to conform internally to a rounded wall of the upper part, this wall is surmounted by a plate-shaped wall 612 whose long length is arranged perpendicular to the median plane of the wall 611 to locally support the edge of the access opening of the tank.
• the wall 611 is extended in its dorsal portion by a heel 613 of small thickness adapted to be inserted into the gap provided between the upper part and the lower part of the casing of the tank.
• a first housing 614 is formed in the wall 611, across its inner face, being rotated horizontally in FIG.
• each voussoir 610 is joined to an intermediate element 530 by a bar 650b.
• this intermediate element 530 is provided on its two side walls 533 respectively two bosses 535 in which are formed two housing 536 for receiving the ends of the two connecting bars 650b.
• each voussoir 610 to be carried on another voussoir placed vis-à-vis or to be carried on the bottom 310 of the 110 of the tank 100, through the floor 500 to prevent sagging of said envelope under the load.
• the shims 630 are intended to be secured in the interstices I remaining between the upper part 200 and the lower part 300 so as to take up and return the forces likely to be exerted on the upper part 200 and the belt 400 of the casing 110 of the tank 100.
• the wedge 630 consists of a block delimited on one side by two lateral facets 631a and 631b, a lower face 632 intended to be turned downwards and delimited on the other by a heel 633 of small thickness adapted to be inserted into the gap between the upper and the lower part of the vessel shell.
• each shim 630 is joined to two voussoirs 610 by respectively two bars 650c.
• a third housing 635 is formed in the low facet 632, to receive a connecting bar adapted to secure the wedge with a floor element.
• each shim 630 is joined to an end member 510 by a bar 65Od.
• this end element 510 is provided on its bottom wall 512 of a boss 515 in which is formed a housing 516 for receiving the end of a connecting rod 65Od.
• the pressure that may be exerted by the burial material on the upper part 200 on the belt 400 is taken up by each voussoir 610, by each shim 630, to be carried on another voussoir, another wedge or to be reported on the bottom 310 of the casing 110 of the tank 100, through the floor 500 to prevent sagging of the casing 110 under the load.
• the housings 536 made in the floor element 530 and the housing 615 made in the voussoir 610 are open and that vents 538 and 618 are made in the wall of these hollow components opening a passage to through these elements allowing the air to circulate as shown by the arrows A.
• the corresponding connecting bars 650 are hollow so that, as shown in FIG. 3, it is possible to ventilate the part situated under the floor to favor with the volume of air contained in the tank, by a supply of oxygen, the operation of the tank 100.
• the vent 538 opens under the walls 531.
• the vent 618 made in the voussoir 610 opens out under the fixing plate 612, that is to say in its upper part, so that its outlet is located above the maximum level of the liquid that can contain the tank , to avoid the formation of a siphon.
• the ventilation of the part under the floor is also achieved through connecting bars supporting the wedges and through connecting bars connecting the wedges with the voussoirs.
• the floor element 510 is, for this purpose, provided with a corresponding opening opening 518.
• the three housings 634a, 634b and 635 made in the calle 630 are open, allowing communication between them.
• the arrows A show that the air can flow between the voussoirs 610 and the four floor elements 540a, 530a, 530b and 510b.
• the constituent elements of the floor 500 and the reinforcement means 600 are introduced into the tank through the access opening 206.
• the floor 500 is constructed by placing the elements 510 and 530 side by side on the floor. bottom wall 312.
• the voussoirs 610 and shims 630 are set up so that the heels 613 and 633 are introduced into the gap I and between two bypasses P to wedge laterally.
• the connecting bars 650 are fixed between the floor elements 510, 530 and the voussoirs 610 and the wedges 630 between the voussoirs
• the elements 510, 530 are secured by bolting to the bottom 310, the heels 613, 633 trapped in the gap I between the bridges P, and the plates 612 of the voussoirs 610 at the periphery of the opening. 206.
• the tank of the invention does not deform after burial when it is not or incompletely filled.
• the reinforcement means 600 behaves as an internal spread to the tank to strengthen its structure so that it resists a pressure that can be applied externally on it.
• the belt 400 protects the envelope 110 at the junction of its upper part 200 with its lower part 300. It also strengthens the structure of the envelope.
• the constituents of the tank 100, the floor 500 and the reinforcing means 600 are advantageously made of polyethylene by a rotational molding process making it possible to obtain hollow pieces of relatively large dimensions.
• the tank 100 that is to say the upper part 200, the lower part 300 and the belt 400 are manufactured in one piece, only valid solution to obtain a perfectly sealed tank.
• the elements 510 and 530 of the floor 500 can be made by the rotational molding process by using a raw material capable of forming a polyethylene foam to increase their rigidity.
• the tank of the invention can be delivered ready for use.
• the tank 100 is intended to infiltrate the soil directly with the filtered effluent.
• the tank is here without a floor and its bottom 310 includes a bottom wall 312 which is perforated with a plurality of passages 313 to allow the effluent to infiltrate, by gravity, directly the soil on which the tank rests.
• the bottom wall 312 has a crenellated section and slots 313 are made transversely in the lower facets of the crenellated section.
• a bowl 320 is attached to the bottom 310 of the tank 100, for example, by a welding operation to collect the filtered effluent.
• This bowl 320 is used in a tank provided with an outlet, when an infiltration tank can not be used.
• a filtration grid may cover the bottom of this bowl or the bottom of the tank to prevent the filtration means from leaving the tank.
• the reinforcement means 600 In FIG. 10 and to allow the transport of the tank, while it is filled, the reinforcement means 600 'incorporates a connecting means 660 between the upper wall 202 of the tank and its bottom 310.
• This connecting means is advantageously constituted by posts 660 secured by their ends in housings 662 made in the upper wall 202 and in the bottom 310. During the transport of the tank, and when it is raised by its upper wall, the posts
• the posts 660 work in extension and hold the bottom 310.
• the posts 660 work in compression by transferring the load supported by the upper part 200 of the tank, on its bottom 310.
• the reinforcement means 600 'further comprises voussoirs 610' of a structure different from that of the first embodiment of the tank, which support its upper part 200 being partially embedded in recesses of this upper part 200 and taking support on the one hand, against the rim of the access opening 206 and, on the other hand, at the level of the belt 400, and by their other edge, on the tubes 670.
• the lower ends of these tubes are supported on the bottom 310 of the tank 100.
• each voussoir 610 'and its corresponding tube 670 are hollow and are provided with vents, thus providing a passage through these elements allowing air to circulate in the tank 100.
• the voussoir 610 ' has in view from below a T-section including two rectilinear profiles 616 abutting on the wall portion of arch 611.
• the two straight sections 616 are supported laterally against the upper wall of the tank to support it.
• the reinforcement means 600 'further comprises a beam 700 secured to two opposite sides of the tank at the waistband 400. By its junction with two sides of the tank, this beam reinforces the structure thereof.
• the beam 700 is respectively provided at its two ends with two ends 710 adapted to be secured in the belt of the tank.
• the beam 700 further comprises a plate 720 which projects downwards so as to be able to bear against the bottom of the tank to reinforce its structure and define two compartments in which two volumes of the filtration means are placed.
• the beam may also support a tipping bucket, not shown, able to alternately discharge a constant amount of effluent in one or the other compartment.
• posts 660 project from the beam 700, in a direction opposite to the plate 720 and whose free ends are fixed on the upper wall 202 of the tank, so that the beam can join this upper wall 202 and the bottom 310 the tank to stiffen it in the median plane where the beam is installed.
• the plate 720 is perforated to limit the amount necessary for its manufacture and so that the two compartments can communicate.
• this beam 700 still supports the elements of a possible distribution plate 120 of the effluent on the filtration means.
• the reinforcing means 600 'of this embodiment of the infiltration tank could in an embodiment not shown, be used on the tank provided with an outlet orifice, and vice versa.
• the use of both types of vats of the invention refers to a use buried in the ground. They can, if necessary, be used while being placed on the ground for specific applications.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Treatment Of Biological Wastes In General (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Body Structure For Vehicles (AREA)
• Details Of Rigid Or Semi-Rigid Containers (AREA)

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• 2007
  • 2007-12-07 FR FR0708549A patent/FR2924697B1/fr not_active Expired - Fee Related
• 2008
  • 2008-12-05 WO PCT/EP2008/066922 patent/WO2009071682A1/fr active Application Filing
  • 2008-12-05 US US12/745,854 patent/US8851317B2/en not_active Expired - Fee Related
  • 2008-12-05 CA CA2708046A patent/CA2708046C/en not_active Expired - Fee Related
  • 2008-12-05 EP EP08858048A patent/EP2222576A1/de not_active Withdrawn

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