FR2840234A1 - Combined water flushing vehicle, for cleaning tanks and sewers and the like, has a waste water recycling system with a screening chamber and grid, to recycle its own cleaning water without drawing on public supplies - Google Patents

Abstract

The screening system, in a waste water recycling circuit in a combined water flushing vehicle, has a sludge tank (2) which can be opened at the bottom (3). A recirculating pump (5) is at the base of the tank. A housing at the opening base defines a screening chamber (7) with a fixed grid, and cleaners (16) to keep the grid free from clogging. The screening system, in a waste water recycling circuit in a combined water flushing vehicle, has a sludge tank (2) which can be opened at the bottom (3). A recirculating pump (5) is at the base of the tank. A housing at the opening base defines a screening chamber (7) with a fixed grid, and cleaners (16) to keep the grid free from clogging. An inner cover (8) can be moved between a sealed and closed position and an outflow opening (12) linked to a volume capacity (13). An evacuation piping (14) allows the pump to transfer the waste water held in the sludge tank into the recycling circuit after passing through the grid.

Description

any of the preceding claims.

  l The present invention relates to a degreasing device

  rides on a recycling circuit equipping a hydrocombined vehicle

  multipurpose tanker fitted with pilot control systems by a program automaton and a sludge tank with an opening bottom so as to make it possible to recover the waste water pumped in particular in sewers or tanks and to reuse it as cleaning fluid after having it fact

  undergo a treatment cycle in purifying organs.

  There are currently vehicles for cleaning and collecting

  reading of effluents, working in rounds, which are commonly named

  o by specialists .. combined hydrocureurs> ..

  Such vehicles, which are versatile, are specially adapted to carry out different types of cleaning such as, for example, cleaning of fuel tanks or tanks of service stations or

  cleaning of grease traps or sewer systems.

  s These vehicles, which must comply with very strict wind regulations constituted by a tractor or a carrier cooperating with a tank, the internal part of which is subdivided into at least two compartments, namely on the one hand a first compartment or mud tank which is generally equipped with an opening bottom and located at the rear of the vehicle, and is capable of cooperating with a vice pump and with a suction pipe, and on the other hand a second compartment or tank clean water capable of cooperating with a high pressure pump as well

  with at least one cleaning hose.

  In such a vehicle, the vice pump is used to reduce the pressure prevailing in the sludge tank so as to allow the suction, using the suction hose, one end of which dips into the product to be pumped while the opposite end is connected to a filling hose fitted with a filling valve which is mounted on the ex

dull tank.

  In the particular case of cleaning sewage systems or reservoirs, such vehicles must be able to inject into the medium to treat very large quantities of water under pressure, which can reach

4001 / min or more.

  This results in obvious problems from the point of view of energy and drinking water consumption as from the point of view of autonomy. To remedy these drawbacks and promote the integration of hydrosorbent combined vehicles in our cities, we had the idea of equipping them with a recycling circuit so as to make it possible to reuse the waste water pumped into the sludge tank as fluid cleaning after having subjected them to a cycle of treatment in purifying organs. Such a wastewater recycling system must of course be compatible with the quality of water required by the high pressure pump.

  sion fitted to the clean water tank used for cleaning.

  To this end, it is essential to equip this system with a degreasing device likely to rid the waste water contained therein.

  to in the sludge tank of the largest bulky materials.

  In addition, to keep the combined hydrocharger vehicle its versatile character, it is essential that the recycling system

can be disconnected.

  The object of the present invention is to satisfy these imperatives by proposing a screening device mounted on a recycling circuit equipping a combined hydrocharger combined vehicle provided with pilot control systems by a program automaton of the type mentioned above, this screen can be switched between on the one hand an open position or recycling position suitable for effluents o for which the recycling circuit and the purification devices have been designed, and on the other hand a closed position in which recycling n is not authorized, suitable for pumping effluents likely to pollute the circuit

recycling.

  In this rear position, the combined hydrocharger s works in a traditional way, to carry out conventional operations such as pumping and cleaning the grease traps, and keeps

  thus makes it versatile.

  According to the invention, this degreasing device is characterized in that it is constituted by a circulation pump housed in the sludge tank and by a housing mounted on the opening bottom of this tank so as to delimit a degreasing chamber containing an essentially flat fixed grid, in particular an essentially vertical grid having a suitable passage prof1, as well as

  hydraulic cleaning of this grid.

  According to the invention, the case is equipped on the one hand with an inner cover cooperating with actuating members capable of moving it between a sealed closing position in which the degreasing chamber is hermetically isolated from the internal part of the

  sludge tank and an open position in which this chamber is-

  this tank in communication, and on the other hand with an outlet orifice linked to a capacity and to a discharge pipe to the purification organs, so as to allow the circulation pump to transfer to these organs the waste water contained in the sludge tank, after it has passed through the grid, when the cover is in

open position.

  It is essential in accordance with this configuration that the housing cover be fitted over its entire periphery with a seal o such as to be hermetically compressed in the closed position so as to perfectly isolate the stripping chamber from the internal part of the sludge tank, and therefore allowing the combined hydrocharger vehicle to function conventionally to carry out operations for which the

recycling would not be possible.

  s According to another characteristic of the invention, the wind hydraulic unclogging members constituted by a set of parallel spraying ramps arranged opposite the grid, each equipped with a series of spray nozzles and capable of moving in back and forth in a plane essentially parallel to that of the grid, along

  o a sliding axis perpendicular to them.

  In the general case in which the grid is essentially

  vertical, the spray booms move in an upward movement

  descending along the sliding axis and thus perform a

continuous cleaning of the grid.

  s It should be noted that according to the invention, the hydraulic cleaning devices are preferably supplied with water recycled under pressure. According to another characteristic of the invention, the evacuation piping to the purification devices is equipped with detection devices.

  o tion of the pressure drop at this level.

  The programmable controller controls the implementation of

  hydraulic unclogging devices as soon as this pressure drop has

dyes a predetermined value.

  The implementation of the hydraulic unclogging devices

  3s is therefore ordered automatically.

  According to a preferential characteristic of the invention, the case is equipped with an external inspection hatch allowing access to these at the degreasing chamber and in particular at the grid and at the organs of

  hydraulic unclogging contained therein.

  The presence of this inspection hatch which can be opened manually corresponds to an essential characteristic of the degreasing device which is the subject of the invention since it allows intervention

  physically from the outside on the grid, the unclogging bodies hy-

  hydraulics, or any other member contained inside the housing, while the sludge tank is full, that is to say without having to empty it, keeping the interior cover in the sealed closing position so as to hermetically insulate the degreasing chamber from the internal part

from the sludge tank.

  Such an intervention is, by way of example, necessary for carrying out a manual unclogging of the grid in the event of clogging thereof due to an exceptional problem, for carrying out the change of

  is this grid, or in the presence of a mechanical problem on the organ-

hydraulic unclogging nes.

  According to another characteristic of the invention such as to allow such an intervention, the sliding axis of the spray bars is pivotally mounted around a parallel axis in order to allow

  o access to them as well as to the grid.

  To prevent any untimely pivoting of this axis, it is

  of course necessary to equip it with locking members.

  According to another characteristic of the invention, the actuating members of the interior wind cover constituted by a control actuator cooperating with a series of connecting rods. These connecting rods are likely to hermetically compress the seal against the housing at the

periphery of the cover.

  The characteristics of the degreasing device which is the subject of the invention are described in more detail with reference to the accompanying drawings in which: FIG. 1 is a view of the rear part of the tank of the combined hydrocharger vehicle represented in half section, - Figure 2 is a cross-sectional view of Figure 1 along the axis II II, 3s - Figure 3 shows a detail of Figure 2, - Figure 4 is a partial cross section of Figure 1 along

axis IV IV.

  s According to FIGS. 1 and 2, the sewerage vehicle is equipped with a tank 1 comprising at its rear part a sludge tank 2, the

  bottom 3 cooperates with members 4 allowing its opening.

  According to figure 1, the degreasing device is constituted by s ['association of a circulation pump 5 represented in dots and a

  case 6 mounts on the opening bottom 3 and delimits a hinge of

mesh 7 has its internal part.

  According to Figures 2 and 3, the boftier 6 is fitted with a cover.

  interior key 8 associated with actuating members constituted by a control o vein 9 cooperating with a system of connecting rods

maneuver 10.

  The actuating members 9, 1O make it possible to move the cover 8 between a closed position shown in solid lines in FIGS. 2 and 3, in which the degreasing chamber 7 is isolated from the internal part of the sludge tank 2 and an open position represented

  in phantom in Figures 2 and 3 in which the chamber 7 and the

  internal tie of the tank 2 vent in communication.

  The displacement of the control cylinder 9 and the connecting rods

  manceuvre 1O is shown schematically on figure 3.

  o According to figure 3, the cover 8 is also equipped with a peripheral seal 11 which is compressed against the housing 6 in the closed position so as to guarantee the tightness of the stripping chamber 7

  vis-à-vis the internal part of the sludge tank 2.

  According to Figures 1, 2 and 4, the housing 6 is equipped with an outlet orifice 12 which communicates with an evacuation capacity 13 and a

  evacuation piping 14 shown in dotted lines on figure 2.

  In view of this configuration, when the cover 8 is in the open position represented by dashed lines on the figure 3, the circulation pump 5 can transfer the waste water contained therein to the internal part of the sludge tank 2 towards purifying organs

  not shown, according to arrow A, passing through the de-

  mesh 7 then in the discharge capacity 13 and in the tubing

Evacuation 14.

  According to FIGS. 1, 3 and 4, the stripping chamber 7 is s5 equipped at its internal part with a fixed vertical grid 15 arranged opposite a set of horizontal spray bars 16 each equipped

  a series of spray nozzles 17 (figure 4).

  According to FIGS. 1, 3 and 4, it is provided with three spray bars 16 each equipped with three spray nozzle nozzles 17. This is of course a configuration which has been chosen by way of example and which

  should in no case be considered as limiting the invention.

  According to Figures 1 and 3, the spray booms 16 wind mounted on a vertical sliding axis 18 along which they little

  wind to move back and forth, by means of a jack 19.

  According to Figures 3 and 4, the housing 6 is also equipped with an external inspection hatch 20 pivotally mounted about an axis 21 o and can be closed or opened manually by means of nuts a

ears 22.

  The purpose of this inspection hatch 20 is to allow

  access to the internal part of the degreasing chamber 7.

  According to FIGS. 1 and 4, the spray bars 16 can pivot around the vertical sliding axis 18 after unlocking of

  the locking member so as to allow access to the grid 15.

  In view of the above-mentioned configuration, when the cover 8 is in the open position, the waste water introduced into the screen chamber 7 by the circulation pump 5 is forced to pass through the grid 15 before being transferred. in the evacuation cap 13 and the evacuation piping 14 to the recycling units.

Claims (5)

R E V E N D I C A T I O N S   1) De-gridding device mounted on a recycling circuit equipping a multi-purpose hydrocharger combined vehicle provided with pilot control systems by a programmed automaton and with a mud tank (2) with bottom (3) opening, so as to allow recover the waste water pumped in particular in sewers or reservoirs and reuse it as cleaning fluid after having subjected them to a treatment cycle in purification devices, characterized in that it is constituted by a pump circulation (5) housed in the sludge tank (2) and by a housing mounted on the bottom (3) opening in such a way as to delimit a degreasing chamber (7) enclosing a grid Fe (15) of preferably essentially flat state thus that bodies (16, 17) for hydraulic unclogging of this grid (15), and fitted on the one hand with an interior cover (8) cooperating with actuating members (9, 10) capable of moving it between a watertight closing position in which the cha screen (7) is hermetically isolated from the internal part of the sludge tank (2) and an open position in which this chamber (7) and this tank (2) are in communication, and on the other hand d '' an outlet (12) connected to a capacity (13) and to a pipe (14) for evacuation towards the purification bodies so as to allow the circulation pump (5) to transfer the water to these organs used contained in the sludge tank (2) after they have passed through the grid   (15), when the cover (8) is in the open position.   2C) Device according to claim 1, characterized in that the wind hydraulic unclogging members constituted by a set of parallel spray booms (16) arranged opposite the grid (15), each equipped with a series of nozzles 'sprinkling (17) and capable of moving back and forth in a plane essentially parallel to that of the grid (15), along a sliding axis (18) perpendicular to that these, by means of a jack (19).   3s 3) Device according to any one of claims 1 to 2, .. characterizes in that   the grid (15) is essentially vertical.   4) Device according to any one of claims 1 to 3,   characterized in that the hydraulic unclogging members (16, 17) are supplied by water recycled under pressure.    ) Device according to any one of claims 1 to 4,   characterized in that the evacuation piping (14) to the purification devices is equipped with pressure drop detection devices at this level, and ['automaton   to program controls the implementation of the unclogging devices hy-   hydraulics (16, 17) as soon as this pressure drop has reached a pre- determined.   6) Device according to any one of claims 1 to 5, IS characterized in that   the housing (6) is fitted with an external inspection hatch (20).   7) Device according to any one of claims 2 to 6,   characterized in that o the sliding axis (18) allows the pivoting of the spray bars   (16) after unlocking the locking member.   8) Device according to any one of claims 1 to 7,   characterized in that the actuating members of the inner cover are constituted by a   control cylinder (9) cooperating with a series of connecting rods