FR2479702A1 - PLATE PRESS FILTER WITH INTEGRATED WASHING OF FILTER PLATES - Google Patents

Abstract

ON GUIDING BEAMS 1 OF THE PRESS FILTER SUPPORT FILTER PLATES 3. THE BLOCK OF PLATES 3 MAY BE COMPRESSED BY MEANS OF A HEAD PLATE 5 MOVED BY A CYLINDER 6; THE UNLOCKING IS CARRIED OUT BY REMOVAL OF THE HEAD PLATE 5, THE PLATES 3 BEING TRANSFERRED IN THE DIRECTION OF THE RETRACTED HEAD BY MEANS OF A MOVEMENT DEVICE 7; THE WASHING OF THE PLATES IS CARRIED OUT BY MEANS OF A MECHANISM 10 MOUNTED ON A TROLLEY 9 HAVING A PARKING BRAKE; THE MOVEMENT DEVICE 7 OF THE PLATES 3 IS SOLIDARITY OF A TRIGGERING DEVICE WHICH CAN CAUSE THE RELEASE OF THE IMMOBILIZING BRAKE AND THE SHIFT OF THE WASHING MECHANISM TOWARDS THE BLOCK OF THE FILTERING PLATES 3 TO BE CLEANED. THIS ARRANGEMENT ALLOWS TO PREVIOUSLY CONJUGATE THE MOVEMENTS OF THE PLATES 3 TO BE CLEANED AND THE WASHING MECHANISM 10.

Description

PLATE PRESS FILTER WITH BUILT-IN WASHING MECHANISM

FILTERING PLATES -

The subject of the invention is a plate filter press in which the vertically oriented filter plates are mounted to slide horizontally on at least one

  guide frame of the press frame of at least one appendage ri-

  gide; in which there is provided a displacement device comprising a support member which is displaceable by means of a control mechanism in a reciprocating movement in

the opening space between the filter plates, a provision

training compound which can be applied against the appendix

each of the plates to be moved, and a plate washing mechanism, which can slide along the filter press, said mechanism comprising at least one projection tube which can be moved inside the opening space of the plate pack , perpendicular to the longitudinal axis of the press. In filter presses of this type, the problem which arises in a large number of fields of application is that the textile filters stretched over the plates

  filters become clogged over time, causing

decreases filtration properties. This is why these textile filters must be cleaned by high pressure water spray. For this purpose, tubes of

  projection with a number of adjustments, the length

  of said tubes corresponding, according to the method of guiding the washing mechanism, either to the width of the plates, or to their height. For cleaning, the plates are

  first tightened together after emptying, then brought individually

  dual up to the interval between the blocks of

ques, as during the emptying process, the projection tubes being then, if they are oriented horizontally,

  slowly moved up and down, the wash water gushes out

making adjustments under strong pressure and arriving safely

textile filter surfaces to be cleaned. The scouring effect

  wise then does not depend solely on the pressure of the projected water or on the configuration of the adjustments, but also on the distance, as constant as possible, between said adjustments and the surface to be cleaned. To keep this distance short, the plates are transported - in an interval

  of limited width, so that a single projection tube

  tion, provided with diametrically opposed adjustments and placed at equal distance from the two framing plates, can clean

simultaneously said plates.

According to another cleaning system, the plate

  scouring is brought substantially to the middle of the space

verture and receives simultaneously, on its two faces, the jets of two projection tubes whose adjustments are directed towards the plate, on which the water is thus projected by hand

and other.

  The fundamental problem for both

  types of cleaning systems result from the obligation to

accurately judge the movements of the plate to be cleaned and the washing mechanism. Difficulties arise mainly

  precise control of the washing mechanism, evolving internally

of the opening space, since this Interval, by

  following the successive reduction of the block of the plates to net-

  toyer and the successive increase in the block of plates

  already cleaned, gradually shifts relative to the bft-

ti from the press.

If the filter presses, that they have plates

  ques suspended or plates supported on beams

  by lateral appendages, can work in a way

  fully automatic during all successive phases of press closing, filtering and opening for

  emptying, thanks to an appropriate control device comprising

both limit switches and detectors there

  has not been possible so far to automate the posi-

  operation of the washing mechanism with respect to the opening space, which shifts with respect to the frame after each washing operation of a plate. Since the course of the different processes depends on different reference planes and these undergo changes in

different distances, partly quite considerable,

fully automatic control of the washing device

could be carried out using the usual control devices

tuels. Until now, the washing device does not work.

only in semi-automatic form with manual execution-

  the, using key switches, the movement and positioning of the washing carriage relative to the opening space which shifts. It is only after this positioning-

hand washing mechanism that the different

the operating phases of the washing process can be

  unroll automatically thanks to control gear

  of appropriate. This is why the washing mechanism must

  be simplified vis-à-vis the installations currently

  naked, so as to create the conditions for the integration of

  said mechanism in the timed sequence of operations of a press filter from the point of view of operating speed,

operational safety and cleaning efficiency

yage.

  This problem is solved, according to the invention, by

placing on the transport carriage of the mechanism an

  mobilization and by combining the displacement device with a triggering member whose function consists in causing the release of the brake during the return stroke and a displacement of said washing mechanism in the direction of the block of plates to be cleaned. This results in the advantage of not

require, for the transport of the plates, only one mechanic

control mechanism, namely the plate displacement device, the latter however displacing the mechanism

washing only when it acts in the direction of the disassembly block

  ques to clean to remove a plate using its organ-

do drive. Therefore, the presence of the immobilizer brake

The washing mechanism gives the assurance that the latter

  denying remains fixed in the position it has reached, compared

port to block the plates to be cleaned, in the press frame

until the plate is pushed. after washes, worms

  the clean plate block. Since the opening space

ture or inter-plate interval between these two blocks. is offset, relative to the frame, by the thickness of a plate, in

  direction of the block of plates to be cleaned, the

  turn is offset in turn during the return stroke of the

  drive device and shortly before the end of said run-

  is, in the same direction, the displacement also being equal to the thickness of a plate. For this purpose, the parking brake is released by the drive member

  As soon as the latter has seized a new plate, it

mobilizes to resume movement in the opposite direction, the parking brake automatically applies, so that the position of the washing mechanism is fixed on the press frame and by reference to the position of

  the opening space. Thanks to an adequate programmed command

  te, the movement device, taking a plate,

mobilizes after having traveled a prescribed distance, for example to the middle of the opening space, so that the plate to be cleaned is positioned precisely with respect to the projection tube. It is particularly useful

  the drive device is arranged so that it

  rigidly store the plates during their translation,

Finally, at the moment when the translation device stops, the plate cannot inadvertently continue its movement under the effect of inertial forces. This allows to precisely control the position of the washing plate on the one hand,

  that of the washing mechanism before each cleaning operation

  toying on the other hand, using the only moving device

ment of the plates.

  In a preferred embodiment of a filter-

  press comprising a displacement device, the member of which

  carrier consists of at least one endless chain

  leaux or Galle joints attached to a device

control, to which is attached a driving device

  ment of each filter plate to be moved, it is provided,

  lon the invention, that a stopper, also fixed-on the chain

  at a certain distance from the drive device, inter-

come to release the immobilization brake of the washing mechanism and allow the displacement of the latter, while on the immobilization brake is provided a counter-stop

  movable which cooperates with said stopper to serve not only

  to release the brake, but also to drive all of the

mechanism. Thus, the joining of trans-

lation of the plate and movement of the washing mechanism is obtained by simple mechanical means, guaranteeing the reliability necessary for the course of all operations.

According to one aspect of the invention, no-

especially in a filter press constructed in the manner described

  te above, that the stop precedes the dgentrat-

on the carrier of the movement device, in

  other terms on the chain at the time of the re- race

  turn of the latter. This arrangement gives the assurance that, during said return stroke, the washing mechanism, brake released, is firstly displaced and that afterwards, when the enttrafrafement member grasps the plate to be taken, thus causing the stopping of the travel device, the washing mechanism is already in position for operation

  subsequent cleaning, the parking brake is applied

  immediately after reversing the direction of travel

of the displacement device. The advantage of such a cons-

  truction lies in particular in that a simple stop is sufficient to cause the drive of the washing mechanism, without

  that it is necessary to have recourse to complex arrangements of prehens-

  if we. According to another advantageous aspect of the invention, it is provided that the counter-stop of the parking brake

  carries a rod cooperating with the stop of the release device

  placement, said rod being movable perpendicularly

  to the movement plane of the counter-stop. Indeed, the re-

  feature of this rod eliminates the engagement between the stop of the displacement device and the counter-stop of the

  parking brake, allowing said transmission device to

  lation to operate without acting on the washing mechanism, which can then, if necessary, be brought manually to a rest position at the end of the press during

filtering and emptying operations.

  According to one aspect of the invention, it is provided that the parking brake is applied against its braking surface by a spring. In principle, one could, it is

true, apply electro-

  mechanical or hydraulic, but the use of a pre-

feels the advantage of operational safety and

  prolonged resistance over a long period of time.

A particularly rational arrangement consists in regulating

  the parking brake so that the stroke of its mt-

  choire, necessary for loosening, be as small as pos-

sible, thereby increasing the accuracy of the distance traveled

  street by the washing mechanism for each shift operation

since the cleat races can then remain, they

also, short.

According to an advantageous embodiment of the invention

tion, it is further provided that the parking brake acts on a rail integral with the press frame, used for movement, the washing mechanism. Indeed, although it is possible, in principle, to apply the brake on one of the rollers of the carriage for transporting said mechanism, the recommended arrangement further improves the blocking of this in its position along the bfti, consequently elimination of sliding phenomena between wheel and rail. It is then useful to make the brake application force act on the underside of the rail, the latter being clamped between the

  rollers and the brake in its locked position.

According to a preferred aspect of the invention, it is also

also provided that the transport mechanism carriage

  washing present, between the stop of the parking brake

  sation and the support member of the projection tube, an in-

  limit switch operating preferably, without

  contact, can be actuated by the stop only during

during the transport stroke of the displacement device and

  arranged in such a way that it stops controlling the device.

  movement when the individual plate which is

  ve engaged in the drive device has reached its po-

  washing station. This process amounts to using the fact that the rigidity of the predetermined distance which separates the organ

  drive plate and the stop that moves the mechanism

washing mechanism eliminates any inaccuracies in the travel of said mechanism. When reversing the direction of movement of the translation device, the position of the stopper coincides with that of the corresponding point of the mechanism

washing with respect to the frame, This stop therefore makes it possible to

  accurately finish the required stroke length

to bring the plate to be cleaned to its washing position

  ge, because thanks, on the one hand, to the provision of the contactor on the washing mechanism and on the other hand, to the triggering of the stop pulse by the stop of the displacement device,

the plate to be moved can be locked in a position

  precisely finished compared to the washing mechanism. We

thus manages to determine the distances between the mouthpieces

  res adjustments and the surface of the filter to be cleaned, ma-

  to optimize the mechanical effect of the liquido jets

  Thanks to this ability to adjust the cor-

  rectes between the mouths of the adjustments and the surfaces of the filters to be cleaned, any risk of collision between the projection tube and the plate is excluded as long as the limit switch operates normally, since the stroke of said plate to be cleaned is fixed by the washing mechanism itself-According to a further aspect of the invention, it is provided that the carriage of the washing mechanism carries, upstream of the limit switch in the

  plate transport direction, a switch

  tr8le, preferably operating without contact and actuated

  by the stop during the transport stroke, said intera-

  tor cooperating with a locking circuit acting on

at least the control of the projection tubes This mnterrup-

  control switch is activated when the washed plate

  is taken further, after the end of the washing process.

It is placed so that it does not reverse until the

  that the washed is completely out of the movement area of the

or projection tubes.

According to another feature of the device according to

the invention, it is expected that the carriage of the

vage wears a switch preferably operating without

  contact, on which the part of the drive device acts

  which attacks the plate to be transferred when said

device engages the appendage of said plate, said inter-

  breaker cooperating with an acting locking circuit

  on at least the control of the projection tubes. For the mid-

  is in place of this switch, we use the fact that the drive device must include an erasable heel or a pawl which, at the time of the return stroke, must first pass below the attachment appendage of the

  plate to be transferred, therefore to carry out a corresponding movement

going back and forth. It is only when this heel has grasped the appendage of the plate to be transferred, that is to say when it has returned to its starting position, that the switch emits

  an adequate impulse by releasing the lock of the

  requires projection tubes. This arrangement allows

  check for correct locking of the plate to be transferred to

  washing, giving the assurance that the driving organ of the

  placement of a tube can only be started after the

  from a corresponding command pulse from

  this from the aforementioned stop switch, ensuring that a

  plate is actually in the washing position.

  More specifically, this is a filter press, the frame of which has two lateral guide rails on

which the filter plates are guided by appendices

  these projecting laterally and transferred using

displacement sitives also lateral, while the

washing mechanism can be moved along the press on rails arranged next to the side members, ii is provided, in order to better integrate said washing mechanism in the kinetic working sequence of said press, according to another feature of the invention, articulate the washing mechanism on a vertical mast, the base of which is connected to a transport carriage moving on one of the side rails,

  while a lifting trolley, provided with a

  mast, can go up and down along said mast and that the-

said lifting cart is connected to a bent support arm against the

the bottom, of which 1! free end carries at least one projection tube

  horizontally oriented. Such a washing mechanism is

characterized not only by more-

  reduced, but still by the advantage given by the di-

  support arm bent on the lifting carriage, this

  which practically guarantees rigid guidance of the pro-

jection, avoiding any variable deformation, therefore any

  the distances between the surfaces to be sprayed from the

  filters and the projection tube, during movement

  vertical alternative, even under the action of considerable ejection pressures in the projection tube. Another advantage of this arrangement results from the fact that said tube can be rigidly secured to its support arm, which simplifies, on the one hand, the construction and allows, on the other

  part, to be content to provide, in the control system

  of the filter press, adequate control of the driven motor

  the lifting carriage and an inlet valve for the

  liquid in the projection tubes.

  In the case of large plates, it is provided, according to a development of the invention, that the mast

  take support, by means of a support arm for-

  seen from a roller, on the rail fixed to the second guide rail.

According to another advantageous development of leinven-

  tion, it is intended that plate or brush deflectors

  its, oriented towards the plate to be cleaned, are arranged above

  less above the projection tube. These t8les or brushes

  deflectors can be extended to close proximity

  mediate the surface of the filter plate to be cleaned, thanks to

this to the precision of the positioning of said plate with respect to

washing mechanism screw.

An advantageous development from away invention 'provides, in addition, in the case where two projection tubes have projection orifices oriented towards one another are used, the presence of support members arranged on the support arm, above and below the tubes and oriented

  towards the plate to be cleaned, the distance between two such

  ganes of opposite supports being slightly greater than the thick-

  sor of the plate to be cleaned, This arrangement presents the advantage

  tage to provide support to the plates, at the time of washing, to

  immediate proximity to the projection tubes, pocketing the

  tell plates to perform rotational or pendulum movements, even when subjected to incoming jets

under different pressures, By having two supports

placed on each side of the plate, it is ensured that said plate is firmly held while the tube

  projection covers its surface. With particular regard to thread-

very presses the frame of which comprises at least one guide beam from which the filter plates are suspended, the displacement device being disposed on said guide beam, the carriage for the washing mechanism being

also guided on this beam, it is provided, according to the

  vention, that said transport carriage is secured to an endless traction member, placed above the chain of the movement device and whose lower strand is parallel to the upper strand of said chain! of the movement device, the carriage comprising a stop acting on the stop of the immobilizing brake, while the lower strand of the traction member is provided, in the area

next to the upper strand of the chain of the de-

placement, of another drive member, cooperating with that carried by the upper strand of said chain. This

  configuration gives assurance that even in the case of wire-

very presses built according to the mode indicated above, it

  remains possible to implement, despite the low cost

brement available in the area of the drive member, the mechanical action on the carriage of the washing device, provided by the invention, thus guaranteeing, even in this case, the advantage of the precise positioning of the washing mechanism thanks to to securing the latter with the device

  of translation of the filter plates.

  To better understand the purpose of this

invention, we will describe below by way of pure examples.

  illustrative and nonlimiting, several modes of realization

sation shown in the drawing.

In this drawing: - Figure 1 is a schematic elevation view

  a filter press, the filter plates of which take up

* then on two lateral beams by means of lateral appendages

  raux; - Figure 2 is a sectional view, on a larger scale, of the washing mechanism according to II-II from there Figure 1; he

  - Figure 3 is an elevational view of the mechanism

  washing me including the transport trolley-from this-

deny; - Figure 4 is an elevational view, on a larger scale, showing details of the carriage of the washing mechanism; - Figure 5 is a sectional view of the transport carriage along V-V of Figure 4; - Figure 6 is a sectional view of the transport carriage according to VI-VI of Figure 4; - Figure 7 is a sectional view along VII-VI% of Figure 4; - Figure 8 is an elevational view in direction A of Figure 2, showing an arrangement of% 5 projection tubes; - Figure 9 is an elevational view, in the direction A of Figure 2, showing another arrangement of the projection tubes; - Figure 10 is an elevational view, in the direction A of Figure 2. of a third arrangement with a single projection tube; FIG. 11 illustrates, by a side view, a preferred mode of emxCutlon of the device according to the invention, with its corresponding plate displacement device.

- Figure 12 is an elevational view of a wire-

very close from which the filtwanteo plates are suspended L uaG

guide beam placed above the press.

  The filter press shown in Figure 1 pre-

  feels a building with, on both sides, wooden beams

  guide 1 on which rest, via ap.

  rigid lateral pendants 2, filter plates 3o The block of plates formed by the meeting of filter plates 3 is supported, at the end of the bgti, on an end plate 4 secured to said b9ti. At the other end of the block of plates is a head plate 5 sliding on the two guide beams 1 and integral with the piston of a hydraulic cylinder 6 which acts in the direction of the press axis, thanks to the plate head 5 and to the hydraulic cylinder 6, the block of filter plates can be compressed so that the seals

  between successive plates are watertight during the process

filtering. After the end of the latter, the press is loosened by removing the head plate 5 and the filter plates are transferred individually in the direction of

  the head plate retracted, using a release device

  placement 7, in order to empty them. In the event that it turns out to be necessary to clean the said plates, after their emptying, by a washing operation, the complete block of plates, which is, after emptying, bearing on the head plate 5, is pushed back towards the plate end 4

  using cylinder 6, then the head plate is removed. In-

  subsequently, thanks to the displacement device 7, the plates 3 are brought separately to the removed head plate 5

by the jack.

To carry out the washing operation, a running rail 8 is fixed, on either side of the press, on

the side members 1 and a plate washing mechanism-10, mon-

tee on a transport cart 9, moves on said

rails along the axis of the press. The moving device

  ment 7 successively removes the plates, one by one from the block

adjoining the end plate 4, transports them individually-

  Lely up to the washing mechanism where they are cleaned by pressurized water and finally conveys them from the mechanism

  to the head plate, so that each time

that plate, the opening space 11, which separates the block

  sant of plates pressed on the head plate 5 of the block of

crescent supported on the end plate 4, is deca-

  in the direction of said end plate 4. It is therefore also necessary to offset the washing mechanism 10, before cleaning a plate, in the direction of the end plate 4, by a

  distance equal to the thickness of a plate. The assembly of the

  washing mechanism and the coupling between the translation of

  filter plates and the offset of said mechanism

  jet of a more detailed development below.

  The sectional view according to Figure 2 shows the mechanism

  washing 10 at the end. This mechanism consists essentially of-

Lement of a vertical mast 12 whose base is supported on the rail 8 pal'intermediate. guided rollers 13 of the transport eye 9. Above the plates 3, a transverse beam 14 is fixed to the mast and rests at its free end, on the rail 8 ′ by means of a roller 15, this second rail being also integral with the guide beam 1

  located opposite to the press. A cart of the-

  vage 16 can slide vertically along the mast 12 under the action of a motor 17 and suitable drive members, for example a roller chain or a Galle chain, by means of which said carriage performs movements of ascent and downhill. The lifting carriage 16 carries, fixed to a support arm 18 bent downwards and at the free end of the latter, a horizontal projection tube 19, provided with a large number

  projection adjustments 20 also horizontal and direct

  to the filter plate 3. The projection tube is fed

  mented in pressurized water by a pipe 21 with rigid tube and flexible pipe, the scouring plate can therefore be sprayed, during the lowering of the lifting carriage, by jets under high pressure. The extreme low position of the tube

projection line is drawn in the drawing in broken lines.

  This sectional view also makes it possible to see that the displacement device 7 runs laterally to the

two guide beams 1, the latter being essentially

  titled, as will be described later in more detail-

  lée, by an endless roller or galle to which

a drive device is attached and which is connected to a motor 22 (FIG. 1) so that said drive device is movable and can move back and forth in the opening space. Figure 3. is a side elevational view of the

washing mechanism according to figure 2. It allows recon-

  be born that, according to this mode of execution, the mat 12 includes

  parallel uprights which guide the lifting carriage between them

  ge 16. The connection between said carriage 16 and the drive motor

tamping 17 is carried out, for example, by a roller or Galle chain passing over two idler pulleys 23, 24 arranged at the two ends of the mat 120 The carriage 9 is

  essentially consists of a plate 25, rigidly solida-

  rised with mast 12, carrying at the ends the guided rollers 13 of the carriage. The end of the plate 25 located opposite the fixed end plate 4 is connected to a parking brake 26, the construction of which will be described in more detail below, with the aid of FIGS. 4, 5 and 6. The plate 25 carries a counter-stop 27 which has the form of a lever arm connected, by means of a coupling rod 28, to the release mechanism of the

  parking brake 26. An adjustable stop screw 29,

  ted by the plate 25 and combined with the counter-stop 27,

  allows to determine the course of the latter between its po-

  rest position, indicated in the drawing, and its position of con-

tact with said screw 29.

  As can be seen from the larger view-

  the according to Figure 7, the free end of the counter-stop

  27 carries a sliding rod 31 which can be moved per-

pendulum to the direction of pivoting of said

  tre-abutment (arrow 30 in Figure 3) to occupy in this

  last two different positions, defined by a provision-

  notched sitive 32. In the position illustrated in FIG. 7, the free end 33 of the rod 31 penetrates into the zone

  of action of the chain of the displacement device 7, of exit

  you that the counter-stop 27 is secured to said

device via the rod 31. In the posi-

  removal of the rod 31, the counter-stop 27 is not

engaged by the displacement device 7.

  The chain 7 of the movement device carries a stop 34 which can cooperate with the counter-stop 27, when said stop moves in the direction of the arrow 35,

  pivoting said counter stop until it

  against the stop screw 29. As explained more

  this movement has the effect of releasing the parking brake

  mobilization 26, so that the washing mechanism can be moved by the movement device 7 according to the

  direction of arrow 35. As soon as the movement device

ment changes direction and moves opposite arrow 35,

the counter-stop 27 returns to its starting position and the

  washing mechanism is blocked by the parking brake

in the position he reached.

Following the direction of arrow 35, the device

training device 36 is attached to the movement device

  upstream of the stop 34. As shown in FIG. 3, the device

  tance between the stop 34 and the elements of the drive device 36 is calculated so that the counter stop 27

resume its starting position as soon as the elements of the

training sitive 36 grabbed appendix 2 from the plate

to be cleaned 3 '.

le3 Since, in the example of execution illus-

very, the washing mechanism 10 comprises two projection tubes

  tion 19 parallel to each other, it is necessary that the displacement device 7 pushes the plate clean up to the pooitiou

  3 "8, indicated by broken lines, for washing.

  Now, this washing positioa is defined not in relation

  to the biti of the press, but compared to the positio of the mechanic

washing device 10, which implies that the de-

placement must stop the drive device 36, in the opening space, in the precise position defined by that of the washing mechanism 10 Now, when the displacement device moves Opposite arrow 35, the mechanism of washing being blocked in the position of Figure 3 in the opening space by its brake 'immobilization the stop 34, located at a determined distance from the device n5 drive along the chIane, moves in the same direction as the plate to be cleaned 3'o The trolley of the washing mechanism carries a racing fi lter selector 37 of prefence fotionnanC ans conittC, which is actuated by the stopper during movement in opposition to the arrow 35, and $ @ which commmique with the driving organ of the leveling device 7, As soon as the stroke rinse switch 37 has been actuated by the stop 34. The displacement device $ i1

  bilise with the plate engaged at that time in the âispo-

  entifrafement entif 36 The distance from the end position 3 $ stroke the stop 34 from the counter stop 27D to the limit switch 37 is calculated in such a way that the actuation of said switch 37 blocks the plate clean in the 3 "position. From then on, a coman

- properly programmed filter press allows switching on

the lift truck together with the feed valve

  mentation of water from the projection tubes opens, the plate in position then being cleaned on both sides by a double passage of the projection tubes. As soon as the lifting carriage has returned to its high base position, another control signal, triggered for example by an end-of-travel switch cooperating with said carriage and not described more precisely, puts the motor unit back into service of the translation device and the filter plate can, after cleaning, resume its movement towards the head plate 5 o it will be clamped against the block of plates which

  is formed there. During this movement, the stop 34 passes from-

  vant a control switch 38 which releases a locking circuit blocking the operation of the lifting carriage 16. This gives the assurance that the interval between the

plates being free only after a course of the net plate-

toyed over a distance defined by the control switch

  on the 38th, the next washing operation cannot start; that

that time and unfold without disruption.

  When cleaning the filter plates

felt to the right of figure 3 unfolded, plate by

  plate, the rod 31 (FIG. 7) is removed, eliminating the engagement

between the displacement device and the

washing. An additional lever 39 now makes it possible to

  manually apply the parking brake and push the washing mechanism to a neutral position, at the end of the press, a new filtering process which can then start after tightening the block of filter plates against the end plate 4 and blockage of said block under the effect

  of appropriate hydraulic pressure.

  While Figure 3 shows the stop 34 and the

  counter-stop 27 in the engagement position, as is

  due immediately after reversing the direction of travel of the device

  translation positive 7, FIG. 4 represents, on a larger scale, the position of the stop 34 relative to the

washing trolley when the plate to be cleaned is

  ve in its washing position 3 ", that is to say at the moment when the stop 34 has just actuated the limit switch 37.

  Figure 4 shows, on a larger scale, a se-

  cond safety switch. This consists for example-

full of an inductive or capacitive generator 40, rigidly mounted

on the outside of the transport trolley and cooperate

  rant with a pivoting pawl 41 also mounted on the chain

riot. The pawl 41, located in the area of the carriage opposite the drive device, is rigidly secured to a

  arm 42 oriented in such a way that the pawl 41 is ra-

  beaten towards the generator 40 when the element 43 of the device

  training, which grabs the plate to be transferred, is

  passed under appendix 2 of this plate and took its posi-

translation tion. The control switch thus designed

  releases, via an appropriate locking circuit

  quat acting at least on the control of the lifting carriage,

  subsequent switching operations that the device

control age must be carried out in such a way that the

  ment of the plate to be cleaned and the movements of the projection tubes can take place. But if, at the time of the

return stroke in the direction of arrow 35, the

  trainer does not pick up the plate to be transferred when passing over

  see appendix 2 of the latter, the safety switch

curity 40, 41, 42 is not inverted and the electric lock

trique remains active, all other control processes then remain blocked until the cause of the fault has been removed. If necessary, the safety switch, 41, 42 can also be combined with an installation

alert or reporting.

  Figure 4, drawn on a larger scale than the

Figure 3, as well as the sections of Figures 5, 6 and 7, to scale

  the largest still, allow to see details of the parking brake. This brake essentially consists

  a console arm 44 located on the side of the carriage and articulated

with a brake shoe 45. The free end of the

  m2choire 45 is covered, 7 on its upper face, with a trim

  brake shoe 46. Guide rods 47 and springs 48, sufficiently stiff, tighten the brake shoe 45

against the underside of rail 8 on which the metro rolls

washing mechanism.

  Furthermore, the counter-stop 27, which has the shape of a lever arm, is rotatably mounted on a pivot 49 carried by the plate 25. This arm 27 is articulated, by means of a connecting rod coupling 28, with a control arm 50 whose base pivots, in the same plane, around a hinge pin 54 also mounted on the plate 25. The control arm 50, which has substantially the shape of a T, carries at its two free ends adjustment screws 52, 53 acting, at a certain distance from the axis 51, on the upper face of the brake shoe 45. These screws 52 ,, 53 are adjusted so that the jaw is applied under the rail 8 with all the force developed by the springs 48, but that there is practically no play between the tips of the screws and

  the upper side of the brake shoe. Therefore, when

  that the stop 34 rotates the counter stop 27 in the direction of arrow 55, the adjusting screw 53 pushes the brake shoe up and down and the parking brake is released. In this respect, the pivoting stroke of the arm 27 is limited by a stop screw 29 which allows it to be adjusted to ensure the release of the brake by a minimum stroke. As soon as the arm 27 comes to bear against the stop 29, said arm 27 practically serves as a nipple of entrainment conjugated with the stop 34, the latter transmitting, from

  this fact, its effort, oriented in the direction of the arrow-

che 35, to ensure the advancement of the washing mechanism. As soon as the translational movement is reversed, the arm 27 of the counter-stop returns to its starting position, recalled by the springs 48, the brake shoe applies again under the rail and the washing mechanism is blocked. on the press stand. By manually operating the arm 27 opposite the arrow 55, the brake is released by the action of the adjusting screw 52 and the washing carriage can be pushed back by hand along the press frame, the opposite of arrow 35, towards the end of said frame in its starting position, until a cleaning movement of the filter plates becomes necessary. Then the carriage is extracted from its

position de.repos, which is generally located at the

  mite the btti which presents the cylinder 6, and brought back by the cleat

27 crossing the entire length of the frame, up to the point

washing position of the first plate. Figures 8, 9 and 10 are elevational views along arrow A of the figure

  re 2, showing different arrangements of projection tubes.

Figure 8 shows the same arrangement as Figure 3e For a better understanding, the position of the plate

  end 4 and that of tLte plate 5 have been indicated

ques in broken lines. In this variant, the projection tubes 19 are mounted on the lifting carriage! 6 by means of two support arms 18 parallel to each other. The orifices of the nozzles 20 have opposite the uses of the others. Above and below each of the projection zones there are t o brushes of dGtfletioa 5% Since the conugation of the trarnsko: n plates with the

  transport of the washing mechanism, explained above, self-

make a very precise positioning of the washing plate in relation to the washing mechanism, the 2-deflec ttles or brushes can be extended until immediate immediacy of the surface of the filter to be cleaned, which can optimize the lori-entation of jetso But like nozzles, even oriented opposite each other, are likely to spray the front with a mmze plate, in certain circumstances, under unequal pressure due to pressure differences on each support arm l usefully presents, on its face opposite a carriage! esge and on either side of projecton tube l9, deez support members 57, 58 oriented lop

  S0 placed one on the other, the distance between the two supports op-

  poses 57 or the two supports 58 being c barely greater than the thickness of the plate to be cleaned. Consequently, in the event that the force exerted by the water jets on one face of the plate is greater than that which applies on the other side, the S5 supports prevent the said plate from pivoting on the

support points of its appendages on the guide beams, Gr & -

  this in the presence of two supports 57, 58 on each face9 one obtains the assurance that the plate cannot tilt under the pressure of the water jets, even when, during the descent of the

carriage, the lower supports 57 or that, during the

  up, the upper supports 58 are each located

on the height of the support surface of the plate during washing

ge.

  In the variant according to FIG. 2, there are also

  two projection tubes 19, but their 2O nozzles

  are directed outwards. In this arrangement, the inter-

  limit switch 37 and the control switch 38 are removed, so that after engagement of the drive device in the plate to be cleaned, the latter is transferred to the other end of the opening space ' across the entire width of it. Cleaning takes place, as can easily be seen in Figure 9, because the tubes

projection screens are brought inside the opening space

ture, simultaneously watering the front side of one plate and the back side of the other. The rest of the operations, in particular the transfer of the washing mechanism according to the changing position of the opening space; corresponds to the process described above. This arrangement also includes deflectors in the form of plates or brushes 56. In the variant according to FIG. 10, the carriage

  lifting 16 carries only one projection tube 19, the latter

  deny with nozzles on two opposite rows, facing outwards. Whereas in the previous examples,

the operations took place in a normal opening space

  wrong, as big as possible, between the two blocks of plates,

the embodiment according to FIG. 10 implies a function-

  washing mechanism inside a space between reduced opening plates. In other words, the plate

  retractable head 5 is not fully recalled for the o

  washing point, but is only moved a distance approximately equal to half the possible opening of the space between plates. This makes it possible to be satisfied with a single projection tube, penetrating in the interval, for

  water the surfaces of the plates which limit said inter-

valle, while keeping the distance at its minimum value

  from said plates to the orifices of the nozzles.

  Figure II illustrates a preferred embodiment of

  tion of the drive device. The head 5 and end 4 plates have been indicated in broken lines to allow a better understanding of the orientation of this device. The return stroke therefore takes place in the direction of arrow 59, while the translational stroke follows the direction of arrow 60. In this variant, the displacement device is composed, as in the previous examples,

a catne 7 with rollers or Galle joints. The dis-

  positive of training according to figure 11 is made up essential-

Lement of a driving member 62 articulated with the chain 7 by means of an axis 61 and having, on its face opposite the appendages 2 of the plates to be transferred, a heel 63. The height of the latter is calculated in such a way that '' it exceeds the plane of the guide table of the guide rails 1 on

  which rest the appendages 2 of the filter plates, the-

  said heel can thus, as shown in Figure 11, Ltre engaged against such an appendage 2e A blocking device 65 is articulated with the catne by an axis 64, symmetrically to the driver 62. The

stroke of the rotary movement of the trainer 62 and of the dispo-

  blocking 65 is limited in both directions by

  notches 66 through which tenons 67 pass.

blocking sitive 65 is biased upwards by a branch spring 68. At the same time, said branch spring 68 biases an elbow lever 709 movable around a pivot 69, the upper arm 71 of which exceeds the guide table of the guide beam 1, while its lower arm 72 enters the driver 62 where it can come into contact with a stud 73.

  The driving organ further comprises an or-

retaining gane 74, provided with a buttonhole 75 in which

the engages a nipple 75 '. The end of the retaining member located opposite the heel 63 also has a heel 76 which acts opposite to the heel 63. The retaining member is also fixed to the chain 7 at its rear end

  via a calibrated spring 77.

  This drive system works as follows.

  During the recall stroke of the

placement, that is to say during the movement in the direction of arrow 59, the retaining member 74 is biased by the calibrated spring towards the stud 75 ', so that the heel 76 swings below the plane guide the guide beam 1, while the heel 79 of the blocking device pivots to rise above said guide plane. The retaining member can thus pass below appendix 2 of the plate to be transferred. The next process, over time, is the contact between the heel 79 in the high position and the appendix 2, which results in the pivoting of the retaining levers 74, around the nipple 75 ', towards the plane represented in the figure.

  11, the heel 76 then coming into contact with the appendage 21.

The spring 77 then sets and its force presses the plates against the end plate 4. The chain 7 continuing its movement, the heel 63 of the driving lever 62 arrives, by its oblique face with a slight slope, against the appendage 2 'and causes said lever 62 to tilt downwards around the axis 61. The bent lever 70 then pivots around the stud 73, the arm

71 making a movement in the direction of that of the cat-

  does, and as soon as said arm 71 comes into contact with the appendix

ce 2, the lever 70 and, with it, the driving lever 62 pivo-

  both around the nipple 73, return to the drive position-

is lying.

  As soon as the attack surface 78 of the blocking member 65 comes to bear against appendix 2 of the plate to be transferred, an inversion system, hydraulically operated

  for example, reverse the movement of the cat, which rolls

  the now in the direction of arrow 60, which allows

bring the corresponding plate to appendix 2,

  to the washing position, then later

  Rement, towards the block of plates which is constituted against the

  head plate 5. During the first phase of this transla-

  tion, i.e. while the plate to be transferred is

  detached from the block, the other plates are kept compressed

  led by the heel 76 of the retaining member 74, which gives

  ensuring that the first plate alone is separated from the block.

The driver prevails on the heel 63 of lorzane entE weur 62 Qce l / 5udas îoLVom * sustes à lfa Èur, liueupeur de comdle 40 4l1 42, by pivoting the arm 42. This dispositig gives the assurance that an opreatiom

wash can only be engaged if heel 63 has pi-

voted up9 take its position dGentanemento rD ece pivotement is possible only if the angled lever 70 took its high position at the time of contact with the appendix 2 of the plate & to move In addition, we see from the layout: 1 illustrated R Figure 1i that, during the transla tion process, the appendix of the plate to be transferred is maintained from the two by the device z entraiementD said plate can therefore not continue its movement under the effect of sound

inertia in the event of untimely air dB ransla- device

'ion. This gives Vasouaace de powoir arzOter the filtering plate with the desired precision in the required position in relation to the Man. washing, respecting the dîsz

correct amz nozzles, for example when the agency-

  ment of the washing mechanism is that illustrated in figure 8, Daas this last the visible elements of the device in tSa; do not show the flgure l! have been reproached with leuts

landmarks of figure ll.

Lz figure 2 illustrates a filter e I plates sseLmduecs uA n, -e poutrze de giae 29 passing above deso! T 'plaque o: Le ota ge et le icuonement _ ,. xreo pese de e tpe sonft on $ nus' ee who can renone aee: licaa2n dlatilia aes anc taieOÉn0o The dispsîtif de displaeemen @ 8t e @ nssl î te ence @ pzrfeencee in a swathe shank rolled-u san $ s end 82 pIacee on the beam = gide au g 'aecsus eu suspensio system and whose trenement d2eno device 83 corresponds2 in its construction, to that described R using figure l! I the only difference is that the appendages 84 of the plates are oriented from bottom to top and

  that, therefore, the heels of the various elements of the provision

  3, decentering device which interact with said appendices

  these are oriented from top to bottom The washing mechanism 85 comprises a carriage 86 rolling on the upper face of the guide beam 80 and carrying a lifting mast 87 laterally surrounding the press, its free end supported by a roller 88, on a corresponding lift rail 89

  placed in the lower area of the machine. A pro tube

  the pivoting jection is guided by this mgt, the construction of this mechanism being known, which makes it possible to dispense with its detailed description. Instead of a mast surrounding the press on one side, it is also possible to use a gantry which surrounds it on both sides by taking support only on the carriage 86, a

or several projection tubes, always horizontal, for

* before sliding vertically inside said gantry.

  In the neutral position, the projection tube remains below the block of plates, so that the plates can, during

  certain operating phases of the filter, go over the

so-called tubes.

The carriage 86 is constructed in a manner analogous to that illustrated in FIGS. 3 and 4 and also comprises an immobilizing brake 90. In the simplest form of this arrangement, an integral stop can also be arranged.

  of the roller catne which precedes the interlocking device

and with which a pivoting lever of suitable length, oriented downwards, cooperates to cause the release of the brake and the transfer of the washing mechanism. However, as a general rule, filter presses of this type are intended for considerable volumes and, therefore, their length is

  important. It is therefore essential to avoid any deformation

  tion of the upper tie rods 91, liable to bend. This effect is generally obtained using one or more crosspieces or support plates linked to the guide beam, which intersect the plane separating the carriage 86 from the device v

83, making it impossible to easily

  trust mentioned above. Since in this case the

direct management of the displacement device, -in the case concerned

  roller chain 82, -not possible for rai-

  congestion sounds, it is planned to have, above the

said trainer, an endless traction member 92, the lower strand of which is parallel to the upper strand of the chain 82, located a short distance from the latter, while the upper strand of the traction member 92 passes along the face

  upper of the guide beam 80. The lower strand carries

te a drive member 93 which cooperates with an antagonist

  te 94 attached to the upper strand of chain 82. Since

  the transfer stroke of the translation device is effected

kills in the direction of arrow 95, the opening space shifts, during the opening of the block of plates located to the left of the washing mechanism 85, at each transfer operation, opposite arrow 95. So the mechanism of

washing, too, shifted step by step from right to left.

This is why the upper strand of the traction member 92 carries a stop 96 which can cooperate with a counter stop 97.

  the parking brake 90, said counter-stop having also

  Lement the shape of a lever, so that the offset of the washing mechanism is provided by the traction member 92 via the two drive members 93 and 94 combined with each other, as well as the stop 96 cooperating with the counter-stop 97 to release the brake. It is therefore, in the same way as in the embodiment described in Figures 3 and 4, by a mechanical coupling of the translation device with the washing mechanism that the latter can be moved step by step following the space shift

  during the washing operation. Likewise, an agent

oement appropriate switches and switches stop, control and safety on the carriage 86 provides,

  via the drive member 93, a position-

  precision of the filter plate to be washed compared to the

washing mechanism.

  Instead of mechanical engagement, described below

above, between the drive device 82, 83 and the mechanism

  washing mechanism, the drive members 93, 94 can also be replaced by contactless switches controlling a drive member separate from the traction element 92, combined under the same conditions as above with the

movement device during the recall stroke.

Ie

Claims (11)

  1 - Plate filter press in which vertically oriented filter plates are slidably mounted   horizontal on at least one guiding beam du.bâti de pres-   se, each of said plates being provided with at least one rigid appendage; and in which a device is provided of displacement comprising a carrying member, which is displaced   çable in a back and forth movement, by means of a mechanism control mechanism, in the opening space between the plates   and which is provided with a drive device which can be applied against the appendage of each filter plate to move, a plate washing mechanism, which can smooth along the filter press, comprising at least one tu-   projection be able to be moved inside the es   opening space of the pack of filter plates, perpendicular   on the longitudinal axis of the characteristic filter press   se by the fact that the carriage of the washing mechanism (10) has an immobilization brake (26) and that the movement device (7) of the plates is integral   a trigger member (34) which, when running   back from the drive, causes the   application of the parking brake (26) and an offset of the   washing mechanism (10) towards the filter plate block (3) to be cleaned.   2 - Filter press according to claim 1, comprising   as a device for moving plates, the support member of which consists of at least one endless traction member secured to a control device, in particular by a Galle or roller chain, to which a device is attached 30. drive device for each filter plate to be transferred, characterized in that the traction member carries, at a   certain distance from the drive device (36), a bu   tee (34) which serves as a triggering device for releasing the parking brake (26) and for shifting the washing mechanism (10), and that on the parking brake, it is   provided with a movable counter-stop (27) cooperating with the bu-   tee (34), acting on the release of the parking brake   (26) and ensuring, at the same time, the transmission of the for shifting the washing mechanism (10) o 3 Filter press ,. in particular according to claim   2, characterized in that the stop (34) precedes the dis-   positive drive (36) along the tractor member (7) during the return stroke of the latter.   4 - Filter press according to one of claims 1   in 3, characterized in that the counter-stop (27) of the parking brake (26) carries a rod (31), mounted to slide perpendicularly to the plane of movement of the counter-stop (27) and cooperating with the stop (34) of the device positive displacement. - Filter press according to one of the claims 1 to 4, characterized in that the immobilizing brake (26) is applied against the opposing braking surface by a spring.   6 -Press filter according to one of claims   1 & 5, characterized by the fact that the parking brake (26) acts on a rail (8) fixed to the press frame and used   dried for moving the washing mechanism, 7 - Filter press according to one of claims 1   6, characterized in that the transport carriage (9) of the washing mechanism (10) carries, between the counter-stop (27) of the parking brake (26) and the support of the projection tubes, a switch limit switch (37) operating preferably. without contact can be actuated by the stop (34) only during the transport stroke   of the travel device and arranged so that it   repeat the command dudlt movement device at the time   o the filter plate engaged individually in the device   positive drive (36) is in the washing position (3 ") 8 - Filter press according to claim 7, charac- terrified by the fact that the transport carriage (9) carries behind the limit switch, in the direction of transport, a control switch (38) operating preferably without contact and actuated by the stop (34)   during the transport stroke, said switch (38) coo-   operating with a locking circuit acting on at least   the control (17) for moving the projection tubes.   9 - Filter press according to one of claims   7 or 8, characterized in that the transport trolley (9) carries a switch (40, 41, 42) operating, pre-   ference, non-contact which can be triggered by the part of the drive device (36) which attacks the plate (3) to be transferred when the latter engages its appendage (2), said switch cooperating with a locking circuit acting on at least the control (17) for moving the projection tubes.   - Filter press, in particular according to one of the vendications 1 to 9, the b9ti of which laterally comprises two guide rails on which the plates are guided   by their laterally protruding and displaced appendages   created by displacement devices placed on the sides said guide rails, while the mechanism of the   can be moved on rails arranged laterally on the guide rails in the longitudinal direction of the press, characterized in that the washing mechanism (10) comprises a vertical mftt (12) whose base is linked to the carriage transport (9) which moves on one of the side rails (8), than a lifting carriage (16) provided of a control (17) can slide vertically back and forth   comes along said mast (12), and that said lifting carriage (16) carries a support arm (18) bent downward, the free end of which carries at least one projection tube (19) horizontally oriented. 11 - Filter press according to claim 10,   characterized by the fact that the mftt (12) is supported by a rail (8 ') fixed to the other guide rail, via the   medial of a strut (14) provided at its base with a roller (15).   12 - Filter press, in particular according to one of the   vendications 10 or 11, characterized by the fact that deflector brushes and / or brushes (56), oriented towards the face to be cleaned of the plate during washing, are arranged at the   at least above a projection tube (19).   13 - Filter press, in particular according to one of the   vendications 10, 11 or 12, characterized in that, in the case of an arrangement with two projection tubes (19) whose projection orifices are oriented towards each other, the support arm (18) door, above and below the tubes (19) of the support members (57, 58) oriented towards the plate to be cleaned, the distance between two support members (57 or 58) arranged opposite opposite being slightly greater than   the thickness of the filter plate (3) to be cleaned. 14 - Filter press, in particular according to one of the   vendications 1 to 9, the frame of which comprises at least one guide to which the filter plates are suspended due, the displacement device being mounted on the guide beam, the transport carriage of the washing mechanism also being guided on this beam, characterized in that the transport carriage (86) of the washing mechanism (85) is secured with an endless traction member (92),   placed above the chain (81) of the movement device ment (81) and whose lower strand is parallel to the upper strand (82) of said chain (81), which the upper strand of the traction member (92) carries, in the region of the carriage (86) of the washing, a stop (96) acting on the counter-stop (97) of the immobilization brake (90), while the lower strand of said traction member carries, in the region adjacent to the upper strand of the displacement rod (82 ), a drive member (93), said upper strand of the cat carrying, for its part, another organ of entrain-   ment (94) combined with the drive member (93) carried by the traction member (92).