FR2784404A1 - OVERFLOW DAM WITH TILTING PANEL - Google Patents

Abstract

The present invention relates to an assembly forming an overflow dam with a tilting panel comprising at least one panel serving as a valve, articulated at its base on the ground along a horizontal axis transverse to the flow between two extreme positions, one raised. opposing the flow, the other folded down substantially horizontal, by means of rotational drive means comprising at least one link articulated by a first end on the panel about a horizontal axis transverse to the flow and the second end of which is able to move in contact with the ground in the axis of the flow by means of translation means comprising at least one cable capable of driving the second end of the rod thanks to means of traction, characterized in that said traction means comprise at least one return member integral with the second end of the connecting rod

Description

AT

  OVERFLOW DAM WITH TILTING PANEL

  The present invention relates to an overflow dam with a tilting panel

  lant comprising at least one panel serving as a valve, articulated at its base on the ground along a horizontal axis transverse to the flow, between two extreme positions, one raised opposing the flow, the other folded substantially horizontal , by means of rotary drive means comprising at least one link articulated by a first end on the panel around a horizontal axis transverse to the flow, and the second end of which is able to move in contact with the ground in the axis of the flow, by means of translation means comprising at least one cable capable of driving the second end of the rod by means

traction.

  Known from patent No. 95 05 271, a system of low panel

  thickness in rotation relative to the ground, equipped at its extremi-

  free tee of a stiffening element itself in rotation relative to the

  dam panel along an axis parallel to the previous one.

  Thus, in the raised position, this element stiffens the tilting panel and, folded down, the assembly offers only slight opposition to the flow since the stiffener, by pivoting, is placed downstream in the axis of the panel. In this way, the difference in useful height at the dam, i.e. the

  difference in water level between raised and lowered positions of the pan

  level, is maximum. However, these stiffening elements cause technical complications and additional costs, and moreover, the lifting of such a panel requires either the use of jacks, which are expensive to

  install and use, i.e. at least two cables per panel.

  However, in this configuration, the assembly becomes tedious to handle when it is desired to raise several panels in order to vary

  intensity or direction of flow for example.

  The invention proposes to remedy these drawbacks by having as an object an overflow dam with a tilting panel using at least one

  thin panel, activated by a simple lifting system

  full, inexpensive, easy to install and maintain. In addition, in the case of several panels, the system is able to actuate them from a single cable in order to modulate the flow easily and in one

  single operation, without having to handle each individual panel-

  is lying. In addition, the device of the invention is capable of being quickly adapted to

  existing dams without incurring significant costs.

  According to the invention, the overflow dam with tilting panel comprising

  at least one panel forming a valve, articulated on the ground by its base followed

  with a horizontal axis transverse to the flow, between two positions

  extremes, one substantially vertical, the other folded down substantially-

  horizontally, thanks to rotational drive means

  taking at least one link fixed by a first end on the pan-

  neau around a horizontal axis transverse to the flow, and the se-

  end end is able to move in contact on the ground in the axis of the flow by means of translation means, comprising at least one cable capable of driving the second end of the rod by means of traction, is characterized in that said means of

  traction include at least one return member integral with the se-

end of the link.

  Preferably, this return member gives the cable a U or V shape, the two strands of which are located upstream of said member in a

  general direction substantially parallel to the flow.

  Advantageously, the link is arranged downstream of the panel.

  According to a first variant, the return member comprises at least one

  pulley linked to the second end of the link.

  According to a second variant, the barrier with tilting panel comprises at least one second deflection member, fixed and capable of deflecting the two strands

of the cable.

  Preferably, the second fixed member is composed of two elements if-

  killed between the base of the panel and the end of the rod which rests on the ground when the panel is in the raised position, and these two elements are capable of deflecting the two strands of the cable perpendicular to the flow. To allow easy lifting of the panel, at least one end

  of the cable is associated with traction means.

  Another possible embodiment consists in aligning several panels capable of being actuated by a single cable, in order to achieve in one

  single operation the successive lifting of said panels.

  Advantageously, two rods are associated with each panel in order to

  to provide better rigidity.

  Preferably, when viewed from above in the folded position, the two links define, with the free edge of the panel, a triangle or a trapezoid.

  The invention will be clearly understood in the light of the description which follows

  referring to illustrative but nonlimiting examples with reference to the accompanying drawings in which Figure 1 shows a cross section of the principle of the invention showing a first embodiment; * Figure 2 is a schematic top view of a variant of the invention combining several panels; 15. FIGS. 3A, 3B and 3C show, in cross section, a panel in the respectively folded down and raised position; and intermediate;

  o Figure 4 shows, in schematic top view, another possibility

  ability to carry out the invention.

  Referring to Figure 1 is shown in cross section a

  first embodiment of the invention forming a pan dam

tilting cradle.

  On the ground 1, having a slope of about 10 to 15 and forming the raft

  of the dam, is hinged a panel 2 forming a gate of the dam.

  This panel, made of metallic material, has a rectangular shape and

  elongated in the vertical direction and very thin compared to

  port to its other dimensions. It is movable in rotation around a horizontal axis XX 'on the ground, transverse to the flow symbolized by the

  arrow f. This articulation on the ground is achieved by all means of soli-

  known darisation, not shown, such as for example a metal rod

  that materializing the axis XX 'and U-shaped arches fixed on the panel 2.

  From this axis X-X ', after panel 2 following the flow, the

  strike off has a slope of approximately 10 to 15.

  The panel 2 can take a multitude of positions between two extreme positions, one raised, substantially vertical opposing the flow

  water, as shown in Figure 1, and a full second-

  folded down, substantially horizontal, allowing the water to flow freely

  is lying. The slope made in the raft makes it possible to house the panel 2 in the folded position which therefore has no projection which would slow the flow.

some water.

  The part located to the left of panel 2 in the raised position as in Figure 1 will be called upstream and the part to the right of panel will be called downstream. Note that in the raised position, as shown in Figure 1, the

  panel 2 made with the ground 1 at an angle between 60 and 80, preferably

near 700.

  On the panel 2 is mounted articulated at least one link bearing the reference 3 and of generally elongated shape. This is rotatably mounted on the panel 2 around an axis YY ′, parallel to the axis of rotation XX ′ of the panel 2, lying approximately two thirds of the latter from the ground and in the middle according to the direction parallel to the axis XX '. The articulation

  around the axis YY ', not shown, uses all known means.

  The second end of the link 3, which rests downstream on the ground, is associated with sliding means, not shown, and with a pulley 4 which moves in solidarity with the link. This pulley 4, called a movable pulley, is fixed to the link 3 by any known means. Two other pulleys 5 and 6 (of which only the pulley 5 is visible in FIG. 1), called return pulleys, are fixed to the downstream raft, on either side of the rod 3 in top view, and substantially vertically of the axis YY 'when the panel 2 is in the raised position. Thus, the return pulleys and 6 form with the movable pulley 4 and for each position of this

  last, an equilateral triangle.

  A cable 7 passes through the idler pulleys 5 and 6 and through the pulley

  bile 4 so that at least one of its ends, and preferably the

  two, are connected on a bank to traction motor means

naked (not shown).

  A block bearing the reference 8, and whose role will be specified later-

  ment, is fixed to the face of the panel located downstream, substantially at

  middle in the direction of the axis X-X ', and under the axis YY'.

  There is shown in Figure 2 a schematic top view of an alternative embodiment o are associated in series several panels 2, 2 '

  and 2 "as described in FIG. 1 but in the folded position.

  Each 2, 2 'and 2 "panel is associated with a rod 3, 3' and 3" respectively and the corresponding movable pulleys 4, 4 'and 4 "secured to the rods. In addition, two fixed return pulleys are associated with each 1V panel, referenced 5 and 6 for panel 2, 5 'and 6' for panel 2 ', and finally 5 "and 6" for panel 2 ". Each pair of fixed pulleys (5, 6), (5 ', 6') and (5 ", 6") is protected from debris carried by the water by a parallelepipedic box (not shown) fixed to the downstream raft. Seen in front of the flow, this housing has a general inverted U shape and the front face is open. The long side of the parallelepiped is parallel to

  the axis XX 'and is located between the latter and the fixed pulleys. The lateral parts

  rales of the housing are parallel to the flow and have recesses

  in order to let the cable pass 7.

  The different panels are aligned along the axis XX 'which is their

  mun and are contiguous, so as to form a sealed door in the raised position. On each bank there is a traction motor means such as a winch 9 and 9 'respectively, connected by cable 7 which passes through

  each of the fixed and mobile pulleys. According to another form of realization

  tion, only one winch can be used and the other end of cable 7 is then

attached to the other bank.

  The cable 7, wound on the winch 9 fixed to one of the banks, passes through the first deflection pulley 5 while being substantially perpendicular to the axis

  of the flow f (strand 10). Then the cable reaches the movable pulley 4 as-

  associated with the first link 3 then goes through a second pulley of

  return 6. The cable 7 then passes through the fixed pulley 5 'and then into the

  next mobile link 4 'associated with the second link 3' and so on until the last fixed pulley 6 "of the third link 3". At the exit of this, the cable 7 is wound on the winch 9 'on the other bank, again

  perpendicular to the flow axis (strand 11).

  The cable 7, when it travels between a fixed pulley and a movable pulley, is substantially parallel to the flow as shown by the strands 12, 13, 14, 15, 16 and 17, which has the effect of reducing the forces to be supplied to raise the panels 2, 2 'and 2 ". In addition, these strands parallel to the flow limit the risks of lateral deviation of the rods 3, 3' and 3"

during their ascent.

  In the folded position of all the panels, if one of the two winches 9 or 9 'is blocked and acts on the other, then the cable 7 is stretched and exerts forces on the pulleys. Those which are mobile move in contact on the ground in the axis of the flow and in opposite direction, starting with the pulley closest to the winch which is actuated. The next movable pulley moves afterwards and so on to the one next to the immobilized winch which slides last. The movable pulleys 4, 4 'and 4 "drive in their movement the links 3, 3' and 3", which by moving, rotate the panels 2, 2 'and 2 "which rise one after the other. We can thus easily modulate the flow of

  the water and the symmetry of the system makes it possible to raise the right or left part

  first of the dam, depending on whether one acts on one or the other of the

9 and 9 'winches.

  The friction inherent in the system induces displacements of the rods 3, 3 'and 3 "offset in time and therefore the progressive lifting

  of each panel 2, 2 'and 2 ". The first panel 2 can be located totally

  slightly raised when the second panel 2 'is at 80% of its position

  lifted and the third, 3 ", at 50 or 60% raised.

  The lifting principle will be well understood by observing Figures 3A, 3B

  and 3C o three positions of the panel and the associated link are represented

  smelled. The element references carry indices a, b and c when-

  that they are in the folded down, intermediate and raised position respectively. In 3A the device can be observed in the fully folded position offering almost zero resistance to flow. The panel 2a and the link 3a are in a substantially horizontal position on the

  strike off thanks to the space cleared by the slope made on the downstream strike off.

  Thus, the flow is almost undisturbed and does not encounter any obstacle. The link 3a and the pulley 4a which is integral with it are in

  their most downstream position.

  The wedge 8a, by resting on the ground, prevents the panel 2a from pressing on the return pulleys 5 and 6 of which only the pulley 5 is visible in all of FIGS. 3A, 3B and 3C. In addition, the wedge 8a is suitable for

  transmit to the raft 1 the force of the water exerted on the panel 2a.

  Then, as indicated above, the fact of blocking one of the traction means and acting on the second causes the tension of the cable 7 which creates a force on the pulley 4 via the return pulleys 5 and 6. This force, parallel to the flow and in opposite directions, displaces the

  pulley 4 which pulls on the link 3 of which it is integral.

  Consequently, the link 3 slides on the raft by means of sliding means (not shown). By way of example, these sliding means comprise on the link a roller or a coating with a low coefficient of friction, cooperating with a fixed metal plate

  on the downstream raft. Thus, the raft does not deteriorate during movement-

links 3.

  The rod 3 then begins to rise to reach the position

  intermediate 3b of FIG. 3B, and by pushing acts on the panel 2 which

  pivots along the axis XX 'and lifts (position 2b). Pan rotations

  level 2 along the axis X-X 'and the link 3 along the axis Y-Y' are done in

opposite senses.

  By continuing to wind the cable on the winch arranged on the bank (for example, the winch 9 in FIG. 2), the link 3 continues its race on the

  write off 1 until reaching the raised position 3c, visible in FIG. 3C.

  In this position, the panel 2c opposes the flow f of the water.

  In order to relieve the entire device and in particular the cable, a

  stop (not shown) is capable of holding the link 3 in its posi-

  raised tion 3c, transmitting to the raft the forces of the water retention on the panel 2. This retractable stop, for example fixed on the plate

  metallic (not shown) associated with the raft, does not interfere with the rise

  tie rod 3 and is able to project with this same im- plate

  immediately after passage of the rod 3 preventing it from descending

  dre. This stop can be constituted for example of a flat iron articulated on the ground around an axis Z-Z 'parallel to X-X' and Y-Y ', downstream of YY'. This flat iron, transverse to the flow and as long as the dam, is actuated by known lifting means such as a jack for example. The stop is thus able to have a raised position where it retains the end

  of each link such as the link 3 and a horizontal position, for

  placed on the raft, allowing the rod 3 and the panel 2 to descend.

  When the end of the link 3 no longer bears against the stop, the pressure

  Zion exerted by the water on the panel 2 folds it in the horizontal position

  tale. In the event of a problem (cable break, breakdown of a winch), a hook (not shown) is provided at the horizontal free edge, opposite the axis XX 'of the panel 2 in order to maneuver the latter to the help of any means

known, mechanical or manual.

he

  Another possible embodiment is shown in FIG. 4. The provision

  sitive, top view schematically in the folded position, comprises two links 3 and 3 ′ associated in pairs with a single panel 2. This arrangement gives excellent rigidity to the assembly, in particular in the raised position of the panel 2. Advantageously, the two links 3 and 3 ′ are arranged in a V (case of FIG. 4) or in a trapezoid with respect to the panel 2. The pushing force of the links is thus better distributed over the panel 2 during the lifting phase. In addition, the force exerted on the latter by the water reservoir is absorbed by two elements, instead of one in the configuration

  in Figure 2, ensuring better overall stability.

Claims (10)

  1. Assembly forming an overflow dam with a tilting panel comprising   both at least one panel serving as a valve, articulated at its base on the ground along a horizontal axis transverse to the flow between two   extreme positions, one raised opposing the flow, the other   driven substantially horizontally, by means of rotational drive means comprising at least one link articulated by a first end on the panel around a horizontal axis transverse to the flow and the second end of which is able to move in contact with the ground in the axis of the flow by means of translation means comprising at least one cable capable of driving the second end of the link by means of traction means, characterized in that said traction means comprise at least one return member secured to the second end of the link.   2. Assembly according to claim 1, characterized in that the return member gives the cable a U or V shape, the two strands of which are   located upstream of said organ in a sensitive general direction- parallel to the flow.   3. An assembly according to claim 1, characterized in that the link   is arranged downstream of the tilting panel.   4. An assembly according to claim 1, characterized in that the return member comprises at least one pulley linked to the second end of the link.   5. Assembly according to one of claims 1 to 4, characterized in that it   comprises at least a second fixed return member capable of deflecting the two strands of cable.   6. Assembly according to claim 5, characterized in that said second   return member comprises at least two elements, located between the   end of the link and the base of the panel when the latter   is in the raised position, and capable of deflecting the two strands perpendicular to the flow.   7. Assembly according to one of claims 1 to 6, characterized in that at   at least one end of the cable is associated with traction means allowing the lifting of the panel.   8. Assembly according to one of claims from 1 to 7, characterized in that   that it has several panels capable of being actuated by a   single cable in order to achieve, in a single operation, the suc- termination of said panels.   9. Assembly according to one of claims from 1 to 8, characterized in that   that two rods are associated with each panel.   10.An assembly according to claim 9, characterized in that the arrangement   relative position of the two rods relative to the free edge of the panel, delimits, in top view and in the folded position, a triangle or a trapezoid.