Waste retention device on the mouth of a pipe, suitable for preventing obstruction of the network and for facilitating emptying thereof

Abstract

Waste retention device (10) comprising a fixed part (40), fixed to a mouth (12) of a pipe (11) of a storm water network, and a removably mounted retention net (61), the inlet of which is held around the mouth, such that all the discharged water passes through the retention net, by virtue of a separable mechanical connection, the separable connection being configured to free the mouth by allowing the net to be released. According to the main features, the device also comprises a first movable part (50) on which the inlet of the retention net is held, the first movable part being mounted pivotably with respect to the fixed part and configured to be movable between two positions: - A locked position in which the first movable part is pressed and retained against the fixed part and the separable connection is activated, - A disengaged position in which the first movable part has pivoted with respect to the fixed part and the separable connection is deactivated, the separable connection additionally being reusable, the move from the disengaged position to the locked position making it possible to automatically restore the separable connection without the need to replace one or more mechanical parts.

Description

Waste retention device on the mouth of a pipeline adapted to prevent obstruction of the network and facilitate its emptying Technical field of the invention

[0001] The present invention relates to the technical field of devices for retaining solid and polluting materials contained in rainwater collection networks and relates in particular to a device for retaining waste at the mouth of a pipe adapted to prevent obstruction of the network and facilitate its emptying. State of the art

[0002] There are waste retention devices equipped with nets and adapted to be fixed on an outlet in order to retain polluting solid matter carried by rainwater and thus prevent pollution of the sea and waterways. These nets are regularly emptied and provide means of securing and protecting against flooding.

[0003] For example, the waste retention device described in the applicant's document WO 2021 / 234175 comprises a first means for fixing the retention device composed of two rigid parts linked together, one part of which is designed to disconnect from the other part in the event of a tensile force on the net greater than a limit tensile force corresponding to a theoretical maximum achievable water flow rate. The disadvantage of such a device lies in the fact that the rigid parts linked together are on one side shackles or carabiners and on the other side eye pistons. They will therefore have to be replaced each time they have disconnected from each other because this action will have caused the breakage of at least one of the two parts. In addition, the breakage of the parts depends on the properties of the material from which they are composed, which can vary over time depending on corrosion, the presence of cracks or deformations.On the other hand, if the parts break, it is more difficult to recover the net to empty it.

[0004] Document KR20190076198 describes a filter assembly for domestic network drains comprising two ring-shaped parts, a movable part and a fixed part on which a strainer is fixed, the two parts being pivotally mounted and connected to each other by means of an elastic hook connection device. The disadvantage of this system lies in the fact that the position of the strainer on the fixed part is not reversible depending on the release or locking of the movable part on the fixed part.

[0005] Document FR3113685 describes a system for attaching a filter net to a mouthpiece comprising two parts connected by means of a tilting hinge and a fusible element blocking the tilting of the front part carrying the net relative to the rear part and dimensioned to break under the effect of a tilting force of the front part beyond a predefined force threshold. In this document also, the disadvantages lie in the fact that the fusible part must be replaced after each breakage and in that once the part is broken it is more difficult to recover the net to empty it.

[0006] This is why the aim of the invention is to overcome these drawbacks by providing a waste retention device located at the outlet of a pipe comprising a removable mounted net and means for releasing the inlet of the net in the event of a risk of the pipe being blocked by waste thanks to a separable connection between the inlet of the net and its support and reusable without any mechanical part being broken and having to be changed.

[0007] The subject of the invention is therefore a waste retention device comprising a fixed part fixed to a pipe mouth of a rainwater network and a removable mounted retention net, the inlet of the retention net being maintained around the mouth so that all the water discharged by the pipe passes through the retention net thanks to a separable mechanical connection, the separable connection being configured to release the mouth by allowing the release of the inlet of the retention net from the mouth.According to the main characteristics, the device also comprises a first movable part on which the inlet of the retention net is maintained, the first movable part being pivotally mounted relative to the fixed part by means of an articulated connection and the first movable part being configured to be movable between two positions: A locked position in which the first movable part is pressed against and retained against the fixed part and the separable connection is activated, A disengaged position in which the first movable part has pivoted relative to the fixed part and the separable connection is deactivated,.

[0008] the separable connection being further reusable, the transition from the disengaged position to the locked position allowing the separable connection to be automatically reestablished without it being necessary to replace one or more mechanical parts. Brief description of the figures

[0009] The aims, objects and characteristics of the invention will appear more clearly on reading the following description made with reference to the drawings in which:

[0010] represents a schematic perspective view of the device according to the invention,

[0011] represents a first detailed perspective view of the device according to the invention in the locked position, the net not being shown,

[0012] represents a detailed perspective view of the device according to the invention in the disengaged position, the net not being shown,

[0013] represents a second detailed perspective view of the device according to the invention in the locked position, the net not being shown,

[0014] represents a side view of the device according to the invention in the disengaged position. Detailed description of the invention

[0015] As used in the following description, the terms "horizontal," "vertical," "left," "right," "up," and "down," and their adjectival and adverbial derivatives (e.g., "horizontally," "to the right," "upward," etc.), refer to the orientation of the illustrated structure when the particular drawing figure faces the reader.

[0016] The retention device according to the invention shown in is installed in the open air at a mouth 12 of a rainwater collection pipe 11. The device according to the invention can be installed in a terrestrial, aquatic, underwater, maritime or fluvial environment, such as for example at the edge of a watercourse or a body of water 14. The mouth 12 can be an emissary, an outlet or a nozzle.

[0017] The retention device comprises a fixed part and a first movable part. The fixed part 40 is in the form of a substantially rectangular frame surrounding the mouth 12 and the first movable part 50 is pivotally mounted relative to the fixed part 40 in the form of a substantially rectangular frame articulated around a hinge connection. The inlet of a retention net 61 is held on the first movable part 50 so as to completely encompass the mouth 12 so that all the water discharged by the pipeline passes through the retention net and all the polluting waste carried by this water is retained by the retention net 61. In other words, the device is placed in such a way around the outlet of the mouth that it captures all the water and waste passing through this mouth.

[0018] According to an advantageous characteristic, the first movable part 50 comprises a second movable part 60 in the form of a substantially rectangular frame and is slidably mounted relative to the first movable part 50 by means of at least two slides 62 located on the right and left sides of the first movable part. The second movable part is held in abutment on at least one stop 63, located on the lower edge of the second movable part. The retention net 61 is fixed to the movable part 60 and the three axes of symmetry of the parts 40, 50 and 60 are preferably aligned, the parts 40, 50 and 60 being preferably parallel to each other and parallel to the mouth 12.A means for attaching the net to the second movable part 60 may consist of a set of fasteners 75, illustrated in Figures 2 and 4, located on the four sides of the second movable part and which grip the edges of the entrance of the net 61 so as to wedge them and keep the net open. In all embodiments of the invention, the retention net 61 is removably mounted on the retention device. The fixed part 40 is securely fixed to the mouth of the pipe 11. In the embodiment illustrated in the figures, the fixed part 40 is fixed inside the pipe by means of fixing lugs 41, preferably four fixing lugs distributed uniformly around the contour of the mouth 12.When there is a masonry part around the mouth 12 of the pipe 11, for example when the mouth 12 is embedded and flush with a wall as illustrated in the, it is possible to fix the fixed part 40 on the latter without having to fix it inside the pipe.

[0019] The first mobile part 50 is pivotally mounted on the fixed part 40 by means of an articulated connection allowing the first mobile part 50 to rotate around an axis 52 by means of hinges 53, the axis 52 being located on the lower part of the fixed part 40 and of the mobile part 50. The mobile part 50 is thus mobile between two positions, a locked position and a disengaged position, illustrated respectively in figures 2, 3 and 5.

[0020] In the locked position, the device filters all the waste at the mouth 12 of the pipe 11. For this, the inlet of the retention net, not shown in the figure, surrounding the mouth 12 of the pipe is pressed against the mouth by means of the first movable part 50 held tightly against the fixed part 40 to prevent the waste from passing outside the retention net. In the locked position, the two parts 40 and 50 are held and pressed against each other by means of a mechanical connection configured to be able to break. This mechanical connection which retains the first movable part 50 on the fixed part 40 forms a separable connection which can be undone without any mechanical part being broken, consequently, this separable connection is reversible and has the advantage of being immediately reusable.

[0021] When the first movable part 50 is in its locked position, the separable connection is activated and all waste arriving at the mouth 12 of the pipe 11 falls into the net 61. The separable connection is configured to move the inlet of the retention net relative to the mouth.

[0022] In the disengaged position illustrated in Figures 3 and 5, the first movable part 50 is not held and pressed against the fixed part 40 because the separable connection is deactivated but the first movable part 50 remains integral with the fixed part 40 by the articulated connection. The axis 52 of the articulated connection is placed in a substantially horizontal plane and under the mouthpiece so that as soon as the separable connection is deactivated, the articulated connection allows movement of the first movable part 50 around the axis 52 under the effect of the weight of the net, even empty. In the disengaged position, the first movable part 50 being able to rotate freely around the axis 52, the device according to the invention comprises a retaining means for limiting the opening of the first movable part 50 to an angle of maximum value α (alpha) illustrated in the. The angle α is the angle between the fixed part 40 and the first movable part 50 when the latter is in its disengaged position.Preferably this opening angle α will be limited between 30 degrees and 85 degrees so that the second mobile part 60 remains fixed relative to the first mobile part 50 and does not slide outside its location. The determination of the value of the angle α will depend on the location of the device, the size of the net and the rainwater network.

[0023] This retaining means comprises at least one cable 24, the first end of which is fixed using a connecting member such as a hook 64 located on the upper part of the first mobile part 50, hooked precisely onto the second mobile part 60 and the second end of which is attached to a fixed point. The second mobile part 60 being integral with the first mobile part 50, the retaining means retains the two mobile parts 50 and 60 and limits their opening to a maximum angle α. The fixed point can be located on the fixed part 40 () or on the masonry part on which the fixed part 40 is installed (). The length of the cable 24 can be adapted to each configuration of device and location of installation to obtain the desired opening angle α. Preferably, the device comprises two cables 24 each fixed to a connecting member 64.The two connecting members are located on each side and in the upper part of the first mobile part 50 and fixed precisely on each side and in the upper part on the second mobile part 60.

[0024] When the first movable part 50 is in its locked position, the separable connection is activated and any waste arriving at the mouth 12 of the pipe 11 cannot escape outside the net.

[0025] The separable connection is deactivated and the first movable part 50 is released when the force applied to the retention net and therefore also to the first movable part 50 exceeds a fixed threshold.

[0026] When the first movable part 50 is in its disengaged position as illustrated in Figures 3 and 5, the separable connection is deactivated and all the waste arriving at the mouth 12 of the pipe 11 can escape outside the net on the three sides of the first movable part 50 not touching the fixed part 40. In the disengaged position, the separable connection is deactivated and the entry of the net partially frees the mouth.

[0027] Being a sectional view, the arrow only illustrates the upward escape of the waste. The separable connection is a magnetic connection with limited retaining force and comprises a first magnetic attachment part 44 located on the fixed part 40, the first movable part 50 being able to stick by magnetization to the first attachment part thanks to a second magnetic attachment part 54, allowing the two parts 40 and 50 to be pressed and held against each other around the mouth 12. The second magnetic attachment part 54 is for example a magnet of opposite polarity or a ferromagnetic material, for example iron bars. The first magnetic attachment part 44 is located on the side opposite to the side where the articulated connection is located so as to be diametrically opposite with respect to the axis of symmetry of the mouth 12 of the pipe 11.

[0028] The separable link is automatically deactivated and releases the movable part when the tensile force exerted by the net on the movable part 50 exceeds the magnetic retaining force. For example, it is considered that the tensile force of a retention net with a volume of 0.25 m 3 and filled with waste will exceed the magnetic retaining force by a value of 100 kg. Therefore, to size the device with such a net volume, the first magnetic attachment part 44 will be a magnet with a value of 100 kg and the separable connection is therefore configured to release when the tear-off threshold of 100 kg is exceeded. If this magnetic attachment is distributed in three separate locations as shown, the sum of the forces of the three magnets will be 100 kg.

[0029] Depending on the size of the net and the location of the device, the magnetic connection is therefore sized so that the separable connection retains the entrance of the net pressed against the mouth of the pipe by a fixing with a predefined release force. This means of automatically deactivating the separable connection when the traction force exerted by the net on the first movable part 50 is greater than the magnetic retaining force is a means of securing and protecting against flooding. Indeed, it allows, in the event of heavy rainfall which induces a significant and rapid influx of waste into the net, to be able to automatically release the net without human intervention to avoid clogging and blocking the pipe.

[0030] According to an alternative embodiment, the magnetic connection comprises a means for remotely deactivating the separable connection to move the first movable part from the locked position to the disengaged position, when the traction force exerted by the thread on the movable part 50 is less than the magnetic retaining force. The deactivation means is in particular of the electromagnet type. In this case, the first magnetic attachment part 44 of the magnetic connection is an electromagnet electrically powered by a source of electric current provided for this purpose in the fixed part 40. The electromagnet is actuated either when it is electrically powered or when it is not, depending on the category of electromagnet used and the type of circuit used.

[0031] The remote deactivation means is equipped with a wired or wireless communication means capable of communicating between a control box and the deactivation means. This communication means allows a user to actuate or not the electromagnet by powering it or not, and thus to voluntarily control the deactivation of the remote separable connection. This means is useful for being able to plan in advance to clear the entrance of the net from the mouth in the event of forecast weather episodes with heavy precipitation.

[0032] The separable connection is reestablished and reusable when the first movable part 50 moves from its disengaged position to its locked position. This operation can be carried out by hand when the location of the device installation is easily accessible and the weight of the device allows it. Indeed, for a pipe with a diameter less than or equal to 60 cm, the device according to the invention can be manufactured from plastic material such as HDPE (high density polyethylene) preferably manufactured from recycled materials. Devices manufactured from HDPE are light and easy to handle by hand. For pipes with a diameter greater than 60 cm, the parts of the device are metallic so as to be sufficiently rigid.

[0033] Maintenance of the device consists of regularly monitoring and emptying the net. To carry out the net emptying operation, the net is preferably removed from the device during a net lifting operation. Lifting the net is facilitated when it is secured to the first movable part 50 by means of the second movable part 60 slidably mounted on the first movable part 50. To lift and remove the net, it is therefore sufficient to slide the second movable part 60 upwards, the second movable part 60 bearing against the stops 63 located on the lower part of the movable part 50 and guided to the left and right by slides 62 as can be seen in the.

[0034] To slide the second movable part 60, the operator or the crane means is positioned upstream of the device, on the masonry part which surrounds the pipeline or on the pipeline close to the mouth. The connecting members 64 secured to the movable part 60 are grasped, either directly by the operator or by means of a lifting cable and are pulled upwards. The cable 24, once detached from its fixed point, can serve as a lifting cable.

[0035] When the lifting operation is carried out while the first movable part 50 of the device is in the locked position, the end of the cable 24 is detached from its fixed point and is connected to a lifting means, which by exerting on it a vertical traction force and substantially in the same plane as the mouth 12 allows the lifting of the second movable part 60 and the net 61. Indeed, the vertical traction force exerted on the cable simultaneously causes the second movable part 60 and the net 61 to rise upwards while it slides freely between the slides 62.

[0036] When the lifting operation is carried out while the first movable part 50 of the device is in the disengaged position, the end of the cable 24 is detached from its fixed point and is connected to a lifting means, which by exerting on it a vertical traction force and substantially in the same plane as the mouth 12 allows the first movable part to pass from its disengaged position to its locked position, then allows the lifting of the second movable part 60 and the net 61.

[0037] Indeed, the vertical traction force exerted on the cable 24 does not allow the second movable part 60 to slide when the first movable part 50 is in its disengaged position, and it first causes the rotation of an angle α of the movable part 50 around its articulated connection. Once the rotation has been carried out, the first movable part 50 is pressed and held against the fixed part 40, the separable connection is then activated again. While the vertical traction force continues to be exerted, it then causes the second movable part 60 and the net 61 to rise upwards while the second movable part 60 slides freely between the slides 62.

[0038] The tensile forces exerted on at least one cable to lift the net are carried out continuously and without having to detach and reattach the cable and make the separable connection immediately reusable. The device has the advantage of being able to position the first movable part 50 in its locked position and remove the net during a single lifting operation by a tensile force carried out in a direction which can be carried out in a continuous movement of the lifting means, which reduces the number of operations to be carried out and facilitates emptying.

[0039] Consequently, with a suitable motorized lifting means, a single traction force exerted substantially vertically and substantially in the same plane as the mouth 12 allows the first movable part 50 to move from its disengaged position to its locked position and the lifting of the second movable part 60 and the net 61.

[0040] Once lifted and removed from the device, the net 61 can be emptied. It is replaced by sliding the second movable part 60 onto the first movable part 50 between the slides 62 until it rests against the stops 63.

[0041] The device according to the invention has the advantage of being able to be locked without having to manually intervene on the connections and without having to replace mechanical parts. On the other hand, the action of removing the net from the device by sliding its support upwards makes it possible to automatically lock the first movable part and therefore the device. In the locked position, the device is ready to filter the water leaving the pipe 11.

Claims

Waste retention device (10) comprising a fixed part (40) fixed on a mouth (12) of a pipe (11) of a rainwater network and a retaining net (61) mounted removably, the inlet of said retaining net being held around said mouth so that all the water discharged by said pipe passes through the retaining net by means of a separable mechanical connection, said separable connection being configured to release the mouth by allowing the release of the inlet of the retaining net from said mouth, characterized in that the device also comprises a first movable part (50) on which the inlet of said retaining net is held,said first mobile part being pivotally mounted relative to said fixed part by means of an articulated connection and said first mobile part being configured to be movable between two positions: A locked position in which the first mobile part is pressed against and retained against the fixed part and the separable connection is activated, A disengaged position in which the first mobile part has pivoted relative to the fixed part and the separable connection is deactivated, the separable connection being further reusable, the transition from the disengaged position to the locked position making it possible to automatically reestablish the separable connection without it being necessary to replace one or more mechanical parts., A retention device according to claim 1, wherein said separable connection is a magnetic connection with limited retaining force, a first magnetic attachment portion being located on the fixed portion (40), the first movable portion (50) being able to stick by magnetization to the first attachment portion thanks to a second magnetic attachment portion (54), for example a magnet of opposite polarity or a ferromagnetic material, for example iron plates. A retention device according to claim 2, wherein the magnetic connection comprises means for remotely deactivating the separable connection to move the first movable part (50) from the locked position to the disengaged position, when the tensile force exerted by the net on said first movable part is less than the magnetic retention force. A retention device according to claim 2 or 3, wherein the first magnetic attachment portion (44) of the magnetic connection is an electrically powered electromagnet. Retention device according to claim 4 dependent on claim 3, in which the remote deactivation means is provided with a wired or wireless communication means capable of communicating between a control box and the deactivation means, said communication means allowing a user to actuate or not the electromagnet and thus to control the deactivation of the separable link remotely. Retention device according to one of claims 1 to 5, in which said articulated connection allows the first movable part (50) to rotate around an axis (52) by means of hinges (53), said axis being located on the lower part of said fixed part. Retention device according to one of claims 1 to 6, in which the first movable part (50) comprises a second movable part (60) mounted to slide relative to said first movable part by means of at least two slides (62) and bearing against at least one stop (63), said retention net being fixed to said second movable part by means of a set of fasteners (75). Retention device according to one of claims 1 to 7, in which when the movable part is in the disengaged position, it forms an angle of maximum value α (alpha) with said fixed part thanks to a retention means, the angle α preferably being between 30 and 85 degrees. Retention device according to claim 8, wherein said retaining means comprises at least one cable (24) the first end of which is fixed using a connecting member (64) to the upper part of the first movable part (50) and the second end of which is attached to a fixed point located either on the fixed part (40) or on the masonry part on which said fixed part is installed. Retention device according to claim 9, wherein when the second end of the cable (24) is detached from its fixed point, the first movable part (50) of the device being in the locked position, said cable is connected to a lifting means, which by exerting on it a vertical traction force and substantially in the same plane as the mouth (12) allows the lifting of said second movable part (60) and of the net (61). Retention device according to claim 9, wherein when the second end of the cable (24) is detached from its fixed point, the first movable part (50) of the device being in the disengaged position, said at least one cable is connected to a lifting means, which by exerting on it a vertical traction force and substantially in the same plane as the mouth (12) allows said first movable part (50) to pass from its disengaged position to its locked position, then allows the lifting of said second movable part (60) and of the net (61). Retention device according to one of claims 1 to 11, in which the fixed part (40) is fixed inside the pipe (11) by means of fixing lugs (41), distributed uniformly around the contour of the mouth (12). Retention device according to one of claims 1 to 12, wherein the device according to the invention can be manufactured from plastic material such as HDPE (high density polyethylene) preferably manufactured from recycled materials.

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