FR2733776A1 - OVERFLOW DAM DOOR - Google Patents

Abstract

Assembly forming a overflow barrier door, of the type comprising at least one tilting panel (2) forming a valve, of rectangular shape and articulated on one of its sides on the ground, so that the panel can move in rotation between a folded position substantially horizontal and an active raised position (substantially vertical), by means of drive means (6), the panel (2) comprising stiffening means, in particular in bending, characterized in that the stiffening means comprise at least a stiffening element (3) mounted articulated on the panel, directly or via an intermediate member, along a longitudinal axis (XX) (perpendicular to the flow of water) and connected to said drive means (6) of the panel , so that, on the one hand, the forces of the thrust of the water to which the panel is subjected are taken up by said stiffening element, and on the other hand, the stiffening element is sensitive ement perpendicular to said panel, at least in the part of the travel of the panel close to the raised position of the latter, said stiffening element having a high rigidity in a plane transverse to the panel in the raised position.

Description

OVERFLOW DAM DOOR

  The present invention relates to an overflow barrier door, of the type comprising at least one tilting flap panel forming a rectangular shape, articulated by its lower base on the ground so that the panel can move in rotation between a horizontal folded position and a raised part, by means of drive means comprising at least one member articulated by its free end on the side of the panel opposite the ground, said panel comprising

  stiffening means, in particular in bending.

  Known dam doors of this type are designed to withstand high water pressures, in the raised position of the valve panel. To this end, they have reinforcing elements and / or

  stiffening on their downstream face (opposite to the reservoir).

  This arrangement has at least two major drawbacks.

  First, the stiffening elements generally welded to the downstream face entail a high cost of

manufacturing and transportation.

  Secondly, the known doors consequently have a great thickness, for example of the order of 500 mm or more. Thus, in the horizontal folded position, the door already forms in itself a retention35 of at least this very significant height, which greatly reduces the difference in useful height of the dam, corresponding to the difference between the water levels respectively corresponding to the raised positions

and folded down from the barrier door.

  It has been proposed, in a known manner, to try to remedy these drawbacks by digging the raft downstream of

  the retainer for the horizontal folded door.

  However, these works are long and above all expensive because of the cost of sheet piling and pumping; moreover the topography and lithology do not always allow the execution of these works under conditions

reasonable economic.

  Thus, to date, users wishing to install a tilting barrier door have no other alternative than to have thick known doors projecting from the plane of the downstream discharge, or to undertake major work to lower the

  level of the raft to accommodate the folded door.

  The invention proposes to remedy these drawbacks and relates to a tilting barrier door, of small thickness, while having a

  adequate resistance to water pressure.

  To this end, according to the invention, the overflow barrier door of the type comprising at least one tilting panel forming a valve, of rectangular shape articulated by one of the sides on the ground, along a horizontal axis, so that the panel can pivot in rotation between a horizontal folded position and a raised position, by means of drive or traction means articulated directly or indirectly on said panel, the latter comprising stiffening means in particular in bending, is characterized in that the means stiffening comprise at least one longitudinal element (transverse to the flow of water) and having a relatively high rigidity (in a direction transverse to the panel), said element being mounted articulated either on the panel or on a member connected to said panel, so that on the one hand the forces due to the push of water and applied to the panel are transmitted to said element of r support, in particular in the substantially upper part of said panel (opposite the ground), and on the other hand, said stiffening element has its direction of greatest resistance to bending, in a direction substantially perpendicular to said panel, at least in the part of

  the travel of the panel close to the raised position.

  Preferably, the stiffening element consists of a plane, longitudinal beam.

  According to a first variant, the beam is articulated on the horizontal side of the panel opposite the ground, and the drive means are articulated at their end

  free on the upstream part of said stiffening element along a horizontal axis offset upstream relative to the axis of articulation of the stiffening element on the panel. Preferably, the stiffening element is articulated near the upper part (side opposite the ground) of the panel.

  According to a second alternative embodiment, the stiffening beam is mounted articulated at the end of a series of connecting rods, the other ends of which are themselves articulated on the upper side of the panel (opposite the ground), said beam resting on the ground downstream of the panel, the drive means being mounted

articulated on said beam.

  Preferably, the drive means comprise a cable, tie rod, arm, jack or the like, the end opposite to the panel is fixed to means

  motor, at a height such that, in the raised position of the panel, the stiffening element forms a substantially right angle with said panel.

  Advantageously and in order to reduce costs, the stiffening beam is articulated by a set of trunnions fixed to the beam and / or to the panel, aligned along the same horizontal axis, each associated with a ring fixed on the panel and the stiffening beam. In order to avoid possible vibrations of the hinged beam on the upper side of the panel, in the raised position of the latter, supports are provided at the lateral ends of said beam, said supports

  being attached to the structure of the dam.

  The invention will be clearly understood in the light of the

  description which follows referring to examples

  illustrative but not limiting, with reference to the accompanying drawings in which: - Figure 1 shows a schematic side view of the principle of the invention according to a first embodiment, in different positions of the panel; - Figure 2 is an enlarged detail view of the articulation of the panel on the raft of the dam; - Figure 3 is an enlarged detail view of the articulation of the stiffening beam on the panel; - Figure 4 is a plan view of the stiffening beam; - Figure 5 is a schematic side view of a dam provided with the door of the invention; and - Figures 6A and 6B show schematic side views of an alternative embodiment,

  respectively in the raised and lowered position of the panel.

  Referring to Figure 1, there is shown schematically in side view a first embodiment of the device of the invention, forming tilting dam35. For the convenience and clarity of the design, the structure of the dam itself, the piers and the reinforcements,

were not represented.

  On the ground, forming the base of the dam, and bearing the general reference 1, there is hingedly mounted a dam door referenced 2, forming a valve. The door 2, articulated on the ground along a hinge axis AA, consists of at least one panel or plate of sheet metal, of rectangular shape and elongated in a direction transverse to the flow of the water, symbolized by the arrow f. Thus, the door 2 is capable, in its rotational movement around the axis AA, of taking several positions between a first extreme horizontal position substantially parallel to the ground, and a second extreme raised position o it bears the reference 20, corresponding to a position for maximum retention of the water contained in the dam upstream of the door. There are also shown two intermediate positions 21 and 22 of the door 2 o it forms an acute angle with the ground. In the raised position 20 of the door 2, the latter forms an angle close to 90 with the ground and preferably less than 90. On the door 2 is articulated a stiffening element in the form of a stiffening beam bearing the reference 3, and the respective references 30, 31 and 32 for the respective raised positions 20 and intermediate 21 and 22 of the door 2. The stiffening beam consists of a longitudinal metal plate, in the direction transverse to the flow of the water (arrow f). The stiffening beam 3 has a length (direction

  transverse to the flow) substantially equivalent or very close to the length in the same direction, of the door 2.

  The stiffening beam 3 is mounted articulated on the door 2 along a longitudinal axis X-X relative to the door 2 and to the beam 3, and transverse to the flow of the water. More particularly, the beam is articulated S on the panel 2 so that the upstream side 4 of the beam 3 is located near the upper side 5

(opposite the floor) of door 2.

  Note that in the raised position 20 of the door 2, the beam 3 in its position 30, is substantially

  perpendicular to the plane of door 2.

  The door 2 is capable of being driven in rotation about the horizontal axis AA by any known means, such as for example one, and preferably two cables, of which only the cable 6 is visible in FIG. 1 Preferably, two cables are provided, references 6 and 7 (FIG. 4), the free end of each of which is fixed in rotation, along an axis YY, on the stiffening beam 3. More particularly, the end of the cables 6 and 7 (Figure 4) is fixed to the upstream end of transverse reinforcements, respectively 8 and 9 provided on the beam 3. Preferably, the reinforcements 8 and 9 are arranged at the lateral ends of the stiffening beam 3 (see figure 4). The lateral reinforcements 8 and 9 protrude relative to the upstream side 4 of the stiffening beam 3. The axis YY of articulation of the cable on the lateral reinforcements 8 and 9 (and therefore on the beam 3) is offset towards the upstream with respect to the hinge axis XX of the beam 3 on the door 2 (see FIGS. 1 and 4). With reference to FIG. 1, the cable 6 is shown in position 60 in the raised position 20 of the door 2, and in respective positions 61 and 62 for the intermediate positions 21 and 22 of the door 2. The cable 6 (it the same is true of the cable 7) passes over a pulley 10 rotatably mounted, for example on a stack of the dam (not shown); the end of the cable 6 is associated with drive motor means known in themselves but not described further in detail, and symbolized by the functional block 11. The double arrow g symbolizes the movement of the cable at the outlet of the means

  motor 11 to the pulley 10.

  Starting from the lowered horizontal position of the door 2, where it rests on the ground, the actuation of the motor means 11 in the direction of the pull of the cable 10 6 in a direction opposite to the flow of the water (arrow f), causes the door 2 to be raised, and therefore to rotate about the horizontal axis AA. The door 2 therefore forms an acute angle with the ground. Initially, the pull of the cable on the beam also causes the rotation of the beam 3 relative to the door 2. The beam 3 and the door 2 form, in the horizontal lowered position of the door 2, an angle substantially of 180 ; then as the lifting

  from door 2, the angle becomes less than 180.

  There is shown in dotted lines an intermediate position 22, 32 and 62 respectively of the door 2, the beam 3 and the cable 6. In the horizontal lowered position of the door 2, the beam 3 rests substantially on the ground 1. In the intermediate position shown in dotted lines, the beam 32 bears on the ground 1 only by its downstream end 12. As soon as the cable 6 is subjected to the traction means 11, the beam 3 is lifted from the ground in its upstream part (side 4) then that its downstream end 12 continues to rest on the ground and slides by this same downstream end 12 on the ground to the intermediate dotted position 32. As

  and as the cable is subjected to traction, the door 2 continues its rotational movement around the horizontal axis A-A, and the beam 3 then no longer rests on the ground (see intermediate position 21, 61 and 31).

  In the intermediate position 21, 31 and 61 of the door, beam, cable assembly, the beam 31 has a

  obtuse angle (between 90 and 180) with door 2.

  The traction on the cable continuing, the door 2 continues its rotational movement to reach the raised position 20 o it is substantially

  vertical or at an angle close to 90 with the ground.

  In this raised position of the door 2, the beam 3 is preferably arranged so that it forms a

  substantially right angle with door 2.

  It is understood under these conditions that the forces due to the thrust of the water on the door 2, subjecting the latter to buckling or bending forces, are taken up by the beam 3. These forces have a direction substantially orthogonal to the door 2. However, the beam 3 is intimately associated with the door 2, and has precisely in this transverse direction a very high rigidity. Indeed, the beam 3 being made up of a planar element, is very little deformable, or even undeformable in its plane, that is to say in the direction of the buckling and bending forces

to which door 2 is subjected.

  FIG. 2 shows a schematic detail view on an enlarged scale of the means for securing in rotation the door 2 on the ground 1. A rigid metal rod bearing the reference 13 is arranged parallel to the ground, close to the latter. , and in a direction transverse to the flow of water, parallel to the door 2 and substantially the same length as the door 2. The rod 13 materializes the axis AA of rotation of the door 2 relative to the ground. The rod 13 is held relative to the ground by means of hoops 14 and 15 preferably arranged in pairs, so that the space between each hoop 14-15 of each couple can allow a hoop 16 to be arranged in the form of U inside which the rod 13 is arranged, the arch 16 being itself made integral (by welding

for example) from door 2.

  In Figure 3, there is also shown schematically and on an enlarged scale, a detailed view of the means for rotationally fixing the door 2

relative to beam 3.

  On the door 2 are fixed two U-shaped hoops forming a couple and bearing the references 17 and 18, fixed by welding for example on the door 2. The two hoops 17 and 18 are arranged close to each other , and are made integral with a trunnion in the form of a metal rod 19. Between the arches 17 and 18, integral with the beam 2, a U-shaped hoop 25 can be arranged inside which the pin 19; the arch 25 is fixed to the beam 3 by welding, for example. The pin 19 materializes the axis of rotation XX of the beam 3 relative to the door 2. There are provided as many hoop assemblies 17, 18, pin 19 and hoop 25 as necessary along the sides 4 and 5 opposite respectively of the door 2 and of the beam 3. Figure 4 shows a top view of the beam 3 and the door 2, in the raised position of the door 2, where the elements described above are found, bearing the same references. The number and spacing of the hoop triplets 17, 18 and 19 (Figure 3) is a function of the mechanical stresses and the general dimensions of the beam and the door.30 In Figure 5, a schematic view of side of the dam and in particular the structure comprising a pile 26, a buttress 27 resting on the ground 1. We find the cable 6 fixed to the beam 3 itself articulated on the door 2. A support 28 is provided on the reinforcement 27 of the stack 26, and capable of serving as 1) support for the beam 3, in the raised position of the door 2, that is to say in the position for which the beam 3 is substantially horizontal or slightly oblique. The support 28 thus makes it possible to avoid or minimize the effects of the vibrations to which the beam 3 could be subjected, due to the spillage of the water in the retaining position.

  (corresponding to the raised position of door 2).

  FIGS. 6A and 6B show in cross section an alternative embodiment of the invention, where elements of the same nature or similar have the same references, accompanied by an index A for the raised position of door 2 (FIG. 6A ) and an index

  B for the lowered position of door 2 (Figure 6B).

  Thus, on the floor 1 is articulated the door 2A, according to

axis A-A.

  On the upper side (opposite the ground) of the door 2, is articulated, along an axis B-B, a series of connecting rods 35A (of which only one is shown in Figures 6A and 6B). The other end of the connecting rod 35A is articulated, along an axis C-C, a beam 36A. The axis C-C is horizontal and close to the ground. Note that the axes

  of articulation A-A, B-B and C-C are embodied by pins, rods, cables or the like, in a known manner, and / or as described above and represented in FIGS. 2 and 3.

  The cable 6A is fixed at its free end (downstream) to the beam 36A. This has a shape similar to the beam 3 of Figures 1 and 4 and preferably has a longitudinal rib 37, so that the beam seen in cross section (in a plane parallel to the flow of water) forms a sort of L. The beam 36A thus rests

  on the ground by its upstream part (on the side of the articulation axis C-C with the connecting rod 35A) and by the lower edge of the rib 37.

  The cable 6A is associated with a return pulley 10, and its other end is connected to means

  symbolized by a functional block 11.

  Only the cable 6A is visible in FIGS. 6A and 6B; two cables are provided, at each lateral end of the beam 36, in a similar manner to the shape of

  embodiment shown in Figures 1 to 5.

  Preferably, the raft of the dam, downstream of the doors 2, is arranged so as to have a slight

  slope downstream, from the axis of articulation A-A.

  The operation of the device shown on the

Figures 6A and 6B is as follows.

  Starting from the raised position 2A of the door 2, shown in FIG. 6A, it can be seen that it forms

  an acute angle, close to the vertical, with the ground.

  The thrust force to which the door 2 is subjected is passed on to the connecting rods (35A), which in turn pass this force on to the cable 6A which thus undergoes

all of the tensile forces.

  The thrust forces of the water, tending to deform the door 2, and therefore to bend or buckle it, are transmitted to the beam 36A, via the connecting rods A. From the raised position of the door 2, shown in FIG. 6A, leaving the cable 6 to run downstream, the door 2 is thus allowed to pivot around the axis AA until it takes an extreme lowered position 2B shown in FIG. 6B, for which is substantially horizontal. The connecting rod 35B30 then has a substantially horizontal and slightly oblique direction, parallel to the sloping apron bearing the reference 40. When the door 2 passes from the raised position 2A to the lowered position 2B, the beam 36 slides on the downstream apron 40 To this end, the latter When the door 2 passes from the raised position 2A to the lowered position 2B, the beam 36 slides on the downstream raft 40. For this purpose, the latter can be arranged to be provided with metal rods. forming rails, regularly distributed on the raft in a direction parallel to the flow of water. Note that such metal rods or sliding rails can also be provided in the embodiment shown in Figure 1, thus allowing the downstream end 12 of the beam 3 to slide on these rails. The latter have the advantage of allowing

  to avoid wear and damage to the downstream raft 40.

  As a variant, the downstream ends of the cables 6 and 7 can be made integral with the upper side of the

  door 2 (on the side of the joint B-B of the connecting rods 35).

  It can be seen, in the lowered position of the door 2, that it is in position 2B of the embodiment shown in FIG. 6B or in position 2 of the embodiment of FIG. 1, that the thickness, in a vertical plane (transverse to the flow of water) is reduced, which greatly optimizes the useful ratio of the dam, which can be defined as the height separating the upper planes of the door, respectively

  in the raised position and in the lowered position.

  By way of illustration and illustration, some non-limiting examples of dimensions of the device are given below.

  device of the invention. Height of deflection pulley 10 from the ground: 2000-2500 mm.

  Distance in flat projection between the pulley and the axis A-A: 2800-3500 cm.

  Height / length in the direction transverse to the flow of water, from the door: 100- to 300 cm.

  Width of the beam (in the direction of water flow): 300-500 cm Spacing of the connecting rods (Figures 6A and 6B) between

0.5m and lm.

  The cables 6 and 7 are capable, as a variant, of passing through slots provided on the door 2, and associated with lips of flexible material for sealing

said slots.

14 2733776

Claims (10)

  1.- Assembly forming overflow barrier door, of the type comprising at least one tilting panel (2) forming a valve, of rectangular shape and articulated on one of its sides on the ground, so that the panel can move in rotation between a substantially horizontal folded position and an active raised position (substantially vertical), by means of drive means (6-7), the panel (2) comprising stiffening means, in particular in bending, characterized in that the means stiffening comprises at least one stiffening element (3) mounted articulated on the panel, directly or via an intermediate member, along a longitudinal axis (XX) (perpendicular to the flow of water) and connected to said drive means (6-7) of the panel, so that, on the one hand, the forces of the thrust of the water to which the panel is subjected are taken up by said stiffening element, and on the other hand, the element   stiffening is substantially perpendicular to said panel, at least in the part of the travel of the panel close to the raised position of the latter, said stiffening element having a high rigidity in a plane transverse to the panel in the raised position.   2.- assembly according to claim 1, characterized in that the stiffening element (3) is constituted of a longitudinal flat beam.   3.- assembly according to one of claims 1 or 2,   characterized in that the stiffening element (3) is articulated on the side (5) of the panel opposite the ground, and is arranged on the downstream side of the panel.   4.- assembly according to claim 3, characterized in that the drive means (6-7) are articulated on the upstream part (4) of said stiffening element (3), along an axis (YY) horizontal transverse, offset upstream with respect to the axis of articulation (XX) of   the stiffening element on said panel.   5. An assembly according to claim 4, characterized in that the drive means comprising a cable, tie rod, arm, jack or the like, the end opposite to the panel is fixed to motor means (11), at a height such that in the raised position of the panel (2),   the stiffening element (3) forms a substantially right angle with said panel (2).   6.- assembly according to claims 2 and 3, characterized in that the stiffening beam (3) is   articulated by a set of pins (19) fixed to the beam (3) or to the panel (2), aligned along the same horizontal axis (XX), each associated with a ring (17,18,25) 30 or hoop fixed on the panel or the stiffening beam respectively. 6lE 2733776   7.- assembly according to one of claims 1 or 2,   characterized in that it comprises connecting rods (35A) articulated at one end on the upper side (opposite to the ground) of the panel (2A), and articulated by their other end on said stiffening element (36A), the latter being suitable to rest on the ground and move   by sliding on the ground during the rotation of the panel.   8- assembly according to claim 7, characterized in that the drive means (6A) are fixed to the lower end of the rod (35A) or on said stiffening element (36A).   9.- assembly according to one of claims   previous, characterized in that there are provided supports (28) for the lateral ends of the element   stiffening (3), in the raised position of the panel.   10.- assembly according to one of claims   previous, characterized in that the stiffening element (3) is associated with sliding members attached to the downstream raft (40).