FR2733777A1 - Cleaner for waste from desanding pools in sewer - Google Patents

Abstract

The cleaner (1) is suspended at the top (4) of the sewer (3). It automatically cleans the sewer and the cleaning head (5) empties the waste (8) into a treatment area (6) which has a device which shreds, compacts and dries the waste and then tips it into a store (9). The treatment area (6) may have a sealed valve (10) between the opening (11) between the treatment area and the sewer (3). The valve is activated when there is flooding to give protection. The treatment area (6) has a forced cold air intake at the bottom and a warm air discharge at the top.

Description

 The subject of the invention is a device for mechanization and automation for cleaning up decanted waste in sewage sand settling tanks.

 Currently, these sanding basins are cleaned more or less regularly by sewer workers. These sewer workers who set up cofferdams to divert the batten into the sewer to be cleaned, then by suction pumps, suck up the water and the sand.

 This collection method is not separative because the sand is collected as well as all the motley objects which are deposited in the sewers.

 These cleaning operations require a lot of manpower. In addition, these cleaning methods have many disadvantages.

 The cleaning of a sanding basin creates a lot of noise for the neighborhood and at the same time gives off very unpleasant odors. These sand pools are often located in the city.

 In order to remedy these drawbacks, companies have turned to the creation of more or less automatic cleaning devices.

 The state of the art can thus be defined.

 - Wo 82/02221: this patent describes an apparatus and method for removing obstructions in sewer lines, thereby reducing the flow time in obstructed sewer lines. The apparatus of the invention comprises a cable permanently mounted in the sewer pipe, the cable being permanently twisted along its length and flexible over its entire length so that when this cable is not at rest, it rests substantially flat on the bottom of the sewer line. and a motor coupled to the cable to rotate the cable so that it cleans the sewer pipe. The method according to the invention comprises installing the cable of the device according to the invention in a sewer pipe, connecting one end of this cable to a motor and operating the motor at predetermined time intervals, so that the cable cleans the sewer line.

 - FR-A-2.632.334: the invention relates to a cleaning device. The device comprises a chassis carrying a rotary cleaning tool constituted by an Archimedes screw placed in an orientable tube with the possibility of transverse movement of the screw in the tube, and a means for receiving the materials transported by the cleaning screw, these means being in particular constituted by an Archimedes screw with variable pitch rotating in a tube with a filtering wall.

- FR-A-2.669.060: the invention describes a hydraulic device making it possible, in combination with cyclic winnowing, to perform without assistance
- cleaning of visitable sewerage pipes,
- storage of cuttings at desired points,
- decommissioning at the end of cleaning or, in the event of loading of the upstream network. It consists of a cyclic winnowing ensuring the release of water, a scraper composed of a body provided with articulated wings, a chassis of a regulating shoe of a hooking. A stopper ensures that the scraper is taken out of service and folded up using the joints.

 - FR-A-2.671.298: the invention relates to a carriage intended to partially reduce the volume of an ovoid-shaped sewer in order to channel the pressure and the water flow rate of a combined sewer. This vehicle, which usually cures tubular sewers (15 cm to 100 cm), could clean an ovoid sewer (90 cm to 200 cm high). The chassis is made up of a frame where the cleaning head fitted with its nozzles is fixed. The truck hose is screwed onto this head. The rear wheels of the machine which roll on the floor of the sewer are fixed on this frame. At the front are the wheels, which roll on the base of the sewer walls. These wheels are mounted on two arms of adjustable length and spacing. The front and rear of the machine are connected by a central beam which ensures the rigidity of the whole. This beam is fixed to the rolling parts by means of two brackets adjustable in height. On this beam is bolted the main sheet and on each side of this sheet a wing is fixed by a joint. To prevent the machine from rising when it arrives near a chimney from which it is drawn, there is a grab bar adjustable in length with a wheel at its end which rolls on the roof of the sewer. To move the machine manually there are two removable handles on the supports at the back.

 - FR-A-2.693.220: the invention relates to a process for cleaning up works, in particular sewers, in which a material collecting member is moved in the work, a depression is created at the mouth of this collecting member for sucking up the materials accumulated in the structure and sending them to a substantially cylindrical crusher / crusher provided with an axial inlet and a lateral outlet and internally comprising a rotary hub at the periphery of which hammers are mounted which are free to pivot each around an axis substantially parallel to the hub axis, the materials treated in said crusher / crusher being discharged at the outlet. The collecting member is moved in a body of water present in the structure and covering the said materials to be collected and the vacuum is produced at the mouth of the collecting member as well as the evacuation of the materials from the crusher / crusher only by rotating the dudi hub t crusher / crusher.

- FR-A-2.701.278: To clean and inspect large diameter sewer collectors, a device for cleaning and inspecting a large section sewer collector is used, characterized in that it comprises
- a remote-controlled device having displacement means for moving in the collector, a removable receptacle and loading means for filling the removable receptacle with materials or solid bodies contained in the collector, said remote-controlled device further comprising at least one camera to view the loading means and the state of the collector,
a remote control station for controlling the operation of said remote-controlled device and viewing the images taken by at least one camera, and
- Connection means for transmitting at least information from the remote control station to the remote-controlled vehicle, and vice versa.

 These devices are not completely automatic, they must be implemented and checked by qualified personnel.

As for fully automatic devices, they cannot be used for sewers, already built. Indeed, these devices are designed to be integrated into the creation of the sewer.

 The device according to the invention is fully automatic for cleaning, including compaction, shredding, spinning and storage in containers.

 It allows continuous cleaning without stopping the flow of effluents.

 The sewer worker intervenes to recover the full containers, transport them to a treatment station, clean the containers and replenish the technical room of the sandpit with empty containers.

 The subject of the invention is a method for cleaning sewers and its implementation device.

 The method according to the invention consists in automatically curing continuously, according to a determined cycle, the sewer to be treated over a certain length and this, by means of a cleaning device mounted mobile and suspended at the top of the vault of the sewer after each collection operation. The cleaning pliers unload the waste in a technical room which is itself provided with a shredding, compacting and wringing device, said device pours the waste into storage modules specific to the products thus treated.

 Said specific modules are provided with means facilitating their handling and their perfect unloading.

 Said waste is discharged into a technical room provided with a sealed isolation valve between the orifice which makes the draining basin of the sewer communicate with said technical room. This sealed isolation valve is actuated in the event of floods to protect said room, in the event that the level of the sands is too high. The technical room is equipped with a high and low forced ventilation device.

 The said technical room is also equipped with access hatches for collecting and renewing the storage modules.

Before the opening of these access hatches, the sealed isolation valve is closed and the ventilation is activated to create a draft in vacuum. The air is taken from the outside and injected into the sewer, so as to avoid the rise of odors during the opening time of the access doors.

 The ventilation is kept active during the entire evacuation operation of the storage modules, as long as the access hatches are open.

 The device for implementing the method is composed of a mobile mounted cleaning means suspended from the roof of the collector, equipped with a telescopic and orientable articulated arm.

At the end of the arm, a closed bucket with two shells has a wide opening in the "open jaws" position.

This cleaning method is mainly composed
- a raceway, placed in the roof of the collector,
- a self-propelled mobile cart on the track,
- a mechanically welded chassis supporting a pivoting means with two vertical and lateral angular movements with hydraulic control,
- a hydraulic telescopic arm,
- a bucket with two closed shells with hydraulic control,
- a hydraulic unit on board the chassis, located under a diving bell,
- an automation cabinet located in an out-of-water technical room,
- a manual remote control device,
- a device for detecting the position of the cleaning device on the raceway,
- an automation cabinet for controlling movements and security relating to the functioning of the cleaning device.

The shredding, compacting and wringing device is mainly composed of the following elements
- a drip deck which ensures the passage between the sewer and the technical room,
- compression cylinders, a compaction drawer, a loading hopper,
- a mobile drip tray, a compaction chamber whose outlet opens above a storage module.

 According to a preferred mode, the drip deck also acts as a tight closing valve between the sewer and the technical room.

 At the level of the articulated movable floor for draining the compacted products, there is associated a counter-blade fixed to the frame.

 The storage module is a metal bucket designed in two articulated parts, the shape of said bucket is such that when it is suspended from the hook of a crane, the two half shells thus formed open widely and allow the compacted sand to slide in "cakes" on the steep slopes of the walls of said bucket.

 When the two half-shells of the bucket are closed, a peripheral seal ensures the tightness of the assembly.

 The opening and closing of the bucket are actuated by hydraulic cylinders.

 The bucket is equipped, in its upper part, with an opening for filling which can be closed by a watertight hatch.

 The bucket has substantially the shape of an irregular hexagon formed of two parts whose separation plane is inclined at about 45- from side to side of the bucket, the point of articulation of the two half-shells is located above the upper end of this plane.

 The attached drawings are given as indicative and non-limiting examples. They represent a preferred embodiment according to the invention. They will allow the invention to be easily understood.

 FIG. 1 is a general view of the device for cleaning up decanted waste in the sewer drainage basins.

It highlights: the cleaning device itself, the device for shredding, compacting and spinning the waste, the storage module for said waste.

 Figure 2 highlights the kinematics of the cleaning device.

 FIG. 3 represents the device for shredding, compacting and spinning the waste.

 Figure 4 is an overview showing the location of the device in relation to civil engineering.

 Figure 5 is an overview of the device located on another site, it highlights how the storage modules are replaced and picked up.

 Figure 6 is a view of the open storage bucket with the two articulated half-shells.

 Figure 7 is a view of the storage bucket in the closed position, the two half-shells are joined.

 Figure 8 is a side view of the storage bucket.

 The method according to the invention consists in automatically curing continuously, according to a determined cycle, the sewer 3 to be treated over a certain length, and this, by means of a cleaning device 1 mounted mobile and suspended from the top of the vault 4 of the sewer 3 after each collection operation.

 The cleaning pliers 5 unload the waste in a technical room 6 which is itself provided with a device 7 for shredding, compacting and wringing.

 Said device 7 discharges the waste 8 into storage modules 9 specific to the product thus treated.

 Said specific modules 9 are provided with means facilitating their handling and their perfect unloading.

 The unloading is obtained in particular by the specific shape of said storage modules 9.

 The waste 8 is discharged into a technical room 6 provided with a sealed isolation valve 10.

 This sealed isolation valve 10 is disposed between the orifice 11 which communicates the drainage basin of the sewer 3 and said technical room 6.

 This sealed isolation valve 10 is actuated in the event of floods to protect said technical room 6 in the event that the level of the sands and / or water is too high.

 The technical room 6 is equipped with a high and low forced ventilation device not shown in the figures.

 Said technical room 6 is also equipped with access hatches 12 for collecting and renewing the storage modules 9.

 Before the opening of this access door 12, the sealed isolation valve 10 is closed and the ventilation is actuated so as to create a draft of air in depression.

 The air is taken from the outside and injected into the sewer 3 so as to avoid the rise of odor during the opening time of said access hatches 12.

 The opening of the access hatches 12 triggers the operation of the ventilation and the closing of the sealed isolation valve 10.

 The device for implementing the present method is composed in particular of the cleaning device.

 The cleaning device 1 is mounted movable suspended from the roof of the collector and equipped with a telescopic articulated arm 13 and orientable.

 At the end of the telescopic articulated arm 13 and orientable, is disposed a bucket 14 formed by two shells which have in the open jaws position a wide opening.

 This cleaning means is mainly composed of a raceway 15 placed in an arch 4 of the collector or sewer 3.

 A mobile self-propelled carriage 16 on the raceway 15 moves said cleaning device.

 A mechanically welded chassis 17 supports a pivoting means with two vertical and lateral angular movements with hydraulic control, so as to allow the movements of the hydraulic telescopic arm 13.

 The bucket 14 with two shells is controlled for its opening and closing by an also hydraulic control.

 A hydraulic unit 18 is installed on the chassis 17 located under an immersion bell.

 An automation cabinet, not shown in the figures, is located in a technical room out of water.

 There is also a manual remote control device and devices for detecting the position of the cleaning device on the raceway 15.

 An automation cabinet is also provided in the technical room for movement control and security relating to the proper functioning of the cleaning device.

 FIG. 2 highlights the different telescopic arms, the jacks of the telescopic arm 13 and the rotation jack 19 of the telescopic arm 13.

 The shredding, compacting and wringing device 7 is more particularly shown in FIG. 3.

 A drip apron 10 ensures the passage between the sewer 3 and the technical room 6. This drip apron is operated by a hydraulic cylinder 20.

 According to a preferred embodiment as shown in the figures, this drip deck 10 is at the same time the sealed isolation valve which connects the sewer 3 and the technical room 6, that is to say that which seals the opening 11.

 The detritus is discharged by the clamp 5 and pushed into a compaction drawer 21. The compression cylinders 22 ensure the compacting of the waste in a loading hopper 23.

 The hopper rests on a mobile drip tray 24 which leads to a compaction chamber or compaction tunnel 25.

The outlet from this compacting tunnel 25 opens out above a storage module 9.

 The mobile drip tray 24 is maneuvered as indicated by the arrows. It prevents the detritus 8 already introduced into the tunnel 25 from coming back down when the compaction drawer 21 moves back.

 A counter blade 26, integral with the chassis, ensures the shearing of the detritus 8 pushed by the compaction drawer 21, itself equipped with a blade.

 Figures 4 and 5 highlight the establishment of a cleaning device according to the invention and this, in sand basins arranged differently.

 The storage module 9 is more particularly represented in FIGS. 6, 7 and 8.

 This storage module 9 is a metal bucket designed in two parts 31 and 32, these two parts 31 and 32 being articulated.

 The shape of said bucket 9 is such that when it is suspended from the hook of a crane, as shown in Figure 6, the two half-shells 31 and 32, which form the two parts of the bucket, can s' open widely under the action of a hydraulic actuating cylinder 27.

 When the two half-shells 31, 32 are closed, a seal 28 seals the assembly of the bucket.

 The bucket 9 is equipped in its upper part with an opening 29 for filling which can be closed by a sealed hatch.

 The bucket 9 has substantially the shape of an irregular hexagon formed by the two parts 31 and 32 whose separation plane is inclined at about 45 on either side of the bucket.

 The point of articulation 30 between the two parts 31 and 32 is located above the upper end of this plane.

 The two half-shells 31, 32 of the storage module 9 are maneuvered using hydraulic jacks 27 on board these storage bins 9.

 These hydraulic cylinders 27 for operating the shells and for locking or unlocking are supplied by two flexible hoses and a spring return reel mounted on the truck, shown in at least one figure.

 Each storage module 9 can then be washed with a water jet while remaining suspended from the truck crane before being closed and rested without further maneuver on the truck bed ready for new use.

 The storage modules 9 are therefore only handled using the crane of the transport truck and require no other intervention than the opening or closing of the drain plug and that of the filling orifice 29 .

 This truck acts as a permanent storage area for empty storage modules 9.

 The storage modules can be made of aluminum in order to save dead weight. The interior can be partially lined with polyamide protection and sliding plate which would be interchangeable and removable, for example thus increasing the service life of the material.

 In order to ensure a certain storage autonomy for each of the basins, it is necessary for the storage modules 9 to be installed on a carousel or positioning device which detects that a storage module 9 is full and that another module storage unit 9 can be empty in front of the compactor 7.

 Finally, when the last module is being loaded, an alarm warns the operating department of the impending intervention to pick up and renew the storage modules 9.

 This safety device puts all of the equipment in the standby and protection position when the last module 9 is full and if the personnel has not yet come to empty it.

 REFERENCES 1. Cleaning device 3. Sewer 4. Vault 5. Clamp 6. Technical room 7. Shredding, compacting and wringing device 8. Waste 9. Storage modules 10. Sealed isolation valve / apron draining 11. Drain / technical room port 12. Access hatches 13. Telescopic articulated arm 14. Bucket 15. Tread 16. Self-propelled trolley 17. Mechanically welded chassis 18. On-board hydraulic unit 19. Hydraulic rotation cylinder 20. Cylinder hydraulic system of the drip deck 21. Compaction drawer 22. Compression cylinders 23. Hopper 24. Mobile drip deck 25. Compaction chamber or tunnel 26. Counter blade 27. Hydraulic cylinder of the bucket 28. Gasket watertight 29. Opening 30. Hinge point 31. Part of the storage bucket (half shell) 32. Part of the storage bucket (half shell)

Claims (13)

 1. Method for cleaning sewers of the type using a cleaning device (1) mounted mobile and suspended from the top of the vault (4) of the sewer (3) characterized by the fact  that it consists in automatically curing continuously, according to a determined cycle, the sewer to be treated over a certain length and after each collection operation; the cleaning pliers (5) unloads the waste (8) in a technical room (6) which is itself provided with a shredding, compacting and wringing device (7), said device (7) pours the waste (8) in storage modules (9) specific to the products thus treated.  2. Method according to claim 1 characterized in that  that said specific modules (9) are provided with means facilitating their handling and their perfect unloading.  3. Method according to claim 1 characterized in that  that said waste (8) is discharged into a technical room (6) provided with a sealed isolation valve (10) between the orifice (11) which communicates the drainage basin of the sewer (3) and said technical room (6); this sealed isolation valve (10) is actuated in the event of floods to protect said room (6), in the event that the level of the sands is too high; the technical room (6) is equipped with a high and low forced ventilation device.  4. Method according to claim 1 characterized in that  that said technical room (6) is also equipped with access hatches (12) for collecting and renewing the storage modules (9); before the opening of these access hatches (12), the sealed isolation valve (10) is closed and the ventilation is actuated to create a draft in vacuum; air is taken from the outside and injected into the sewer (3), so as to avoid the rise of odors during the opening time.  5. Device for implementing the method according to claim 1 characterized in that  that it is composed of a cleaning means (1) mounted movable suspended from the roof (4) of the collector, equipped with a telescopic articulated arm (13) and orientable; at the end of the arm (13), a bucket (14) closed with two shells has a wide opening in the "open jaws" position.  6. Device according to claim 5 characterized in that  that this cleaning method (1) is mainly composed  - a raceway (15), placed in a vault (4) of the collector,  - a self-propelled mobile carriage (16) on the raceway (15),  - a mechanically welded chassis (17) supporting a pivoting means with two vertical and lateral angular movements with hydraulic control,  - a hydraulic telescopic arm (13),  - a bucket (14) with two closed shells with hydraulic control,  - a hydraulic unit (18) on board the chassis, located under a diving bell.  7. Device for implementing the method according to claim 1 characterized in that  that the shredding, compacting and wringing device (7) is mainly composed of the following elements  - a drip deck (10) which ensures the passage between the sewer (3) and the technical room (6),  - compression cylinders (22), a compaction drawer (21), a loading hopper (23),  - a mobile drip tray (24), a compaction chamber (25), the outlet of which opens out above a storage module (9).  8. Device according to claim 7 characterized in that  that the drip deck (10) also acts as a sealed isolation valve between the sewer (3) and the technical room (6).  9. Device according to claim 7 characterized by the fact  that at the level of the articulated movable drip tray (24) of the compacted products (8) prevents the trash (8) of compaction already introduced in the tunnel (25) from coming down when the compaction drawer (21) moves back, against blade (26) secured to the chassis shears the detritus (8) pushed by the compaction drawer (21) itself equipped with a blade.  10. Device for implementing the method according to claim 1 characterized in that  that the storage module (9) is a metal bucket designed in two articulated parts (31, 32), the shape of said bucket (9) is such that when it is suspended from the hook of a crane, the two half shells thus formed open widely and let the compacted sand slide into "cakes" on the steep slopes of the walls of said bucket.  11. Device according to claim 10 characterized by the fact  that when the two half-shells of the bucket are formed, a peripheral seal (28) seals the assembly.  12. Device according to claim 10 characterized in that  that the opening and closing of the bucket (9) are actuated by hydraulic cylinders; the bucket is equipped, in its upper part, with an opening for filling which can be closed by a sealed hatch (29).  13. Device according to claim 10 characterized in that  that the bucket (9) has substantially the shape of an irregular hexagon formed by two parts (31, 32) whose separation plane is inclined at about 45 right through the bucket (9), the point of articulation (30) of the two half-shells (31, 32) is located above the upper end of this plane.