FR2776046A1 - A clack valve for a water retention basin - Google Patents

Abstract

The valve includes a fixed tubular body with a truncated orifice on which a freely pivotable leaf is mounted. A male fitting extends the body opposite the orifice and head metal is fitted to the leaf below the pivot axis to urge the leaf to the closed position by gravity and to hold it thus with a predetermined contact pressure. The leaf can be raised open by manual actuation. Seals of chemically resistant elastomer are on the inside surface of the leaf

Description

Closing valve device, in particular for a

Water retention.

  The invention relates to a shutter valve device, in particular for a water retention basin, comprising a tubular fixed body with a truncated orifice on which is adapted a movable leaf mounted to pivot freely on an axis integral with the body, a first seal arranged on the internal face of the leaf opposite the orifice, and a socket extending the body

opposite the hole.

  A nose flap of the kind mentioned is marketed by the company Nicoll, and is positioned at the end of the waste or rainwater evacuation pipe to avoid any risk of backflow, and the rise of pests, animals, rodents, while allowing normal flow of effluents. The flap of the valve is normally closed, and opens automatically by the

  thrust of effluents in the drainage pipe.

  A first object of the invention consists in making a shutter valve device intended to ensure perfect sealing of a drain orifice

  in the event of accidental water pollution in a retention basin.

  A second object of the invention consists in making a shutter valve of simple construction, which can be easily operated by hand between the states

open and closed.

  The shutter valve device according to the invention is characterized in that - a counterweight is fixed to the external face of the leaf below the articulation axis so as to urge the valve by gravity towards the closed position and to maintain it in this position with a predetermined contact pressure, - a control means cooperates with the leaf to raise it by manual actuation to an open position, - and the first seal is bonded over the entire internal surface of the leaf and is made of an elastomeric material having a high chemical resistance. According to a preferred embodiment, the male socket of the body is intended to be introduced into a sealing sleeve having an inlet fitted with a second sliding seal. The second sliding seal is inserted into an annular housing of the sleeve, and cooperates with the lateral surface

cylindrical of the socket.

  The pivot axis of the leaf has a middle part glued in a radial protuberance of the body, and two opposite ends projecting from

  which are mounted to play two hinge legs of the leaf.

  According to a characteristic of the invention, the control means comprises

  a chain fixed to the counterweight by means of assembly.

  According to another characteristic of the invention, the axis extends horizontally above the body, the truncated orifice forming an acute angle close to 30 with

  the vertical direction passing through the axis.

  The body and the flap of the valve are made of a rigid plastic material,

  especially polyvinyl chloride.

  Other advantages and characteristics will emerge more clearly from the

  description which will follow of an embodiment of the invention, given as

  non-limiting example and shown in the accompanying drawings in which: Figure 1 is an elevational view of the shutter valve according to the invention, the leaf being shown in the closed position (strong lines), and in the open position (dotted lines); - Figure 2 is a sectional view along line 2-2 of Figure 1; - Figure 3 shows a side view of a sealing sleeve, with a partial sectional view on an enlarged scale of the sliding joint; - Figure 4 is a front view of the sealing sleeve; - Figure 5 shows a sectional view of a flow manhole equipped with the shutter valve of Figure 1; Figure 6 is an enlarged detail view of the partition wall

the look.

  With reference to FIGS. 1 and 2, a shutter valve 10 intended to be used in a water retention basin, or any other sanitation installation, comprises a tubular plastic body 12 having a truncated orifice 14 on which a leaf 16 is pivotally mounted

  on an axis 18 integral with the body 12.

  The body 12 of cylindrical section is provided opposite the leaf 16 with a male socket 20 intended to be introduced into a sealing sleeve

  22, which will be described in detail below with reference to FIGS. 3 and 4.

  The leaf 16 has a shape conjugated to that of the orifice 14, and is equipped on its internal face with a first sealing gasket 24 bearing on the wall delimiting the orifice 14 when the valve 10 is in the state closed. The first seal 24 is made of rubber or any other elastomeric material having good chemical resistance, in particular made of neoprene, and is bonded to

  the entire internal face of the leaf 16.

  A counterweight 26 is fixed to the outer face of the leaf 16 below the axis 18 to ensure sealing during the closing of the valve 10 in

  stressing the leaf 16 by gravity against the wall of the orifice 14.

  The leaf 16 is actuated towards the raised valve opening position manually by means of a control chain 28 (FIGS. 5 and 6) secured to the counterweight 26 by assembly means. The flyweight 26 and the control chain are advantageously made of

stainless steel.

  The middle part of the axis 18 is glued in a radial protuberance 30 of the body 12, and the leaf 16 comprises two articulation lugs 32, 34 mounted at

  clearance on the projecting opposite ends of the axis 18.

  The axis 18 extends horizontally above the body 12, and the housing plane of the truncated orifice 14 forms an acute angle close to 30 with the vertical direction passing through the axis 18. This results in an effect d optimum closure when the leaf 16 is in contact with the orifice 14 in the closed state of the valve 10. The weight of the counterweight 26 is chosen to maintain the valve

  in the closed state when the chain 28 is released.

  According to Figures 3 and 4, the sealing sleeve 22 comprises a tubular sleeve having an inlet 36 equipped with a second sliding seal 38, inserted in an annular housing 40 of the sleeve. The outer lateral surface of the sleeve 22 is provided with ribs 42 allowing fixing in a wall

of concrete.

  The valve 10 forms an independent part of the sealing sleeve 22, and is delivered disassembled relative to the latter. The sealing sleeve 22 is first placed in the concrete wall by means of mortar, and the valve 10 can then be introduced axially into the sleeve 22 until it

  Coming into engagement of the male socket 20 against an internal stop 44.

  The external diameter of the socket corresponds substantially to the internal diameter of the sleeve 22, and the sliding seal 38 ensures sealing in

  allowing rapid assembly and disassembly of the valve 10.

  Figures 5 and 6 show an example of application of the valve 10 incorporated in a manhole 46 for the flow of a retention basin. The manhole 46 in concrete has a vertical partition wall 48 delimiting an inlet compartment 50 in connection with the retention basin, and an outlet compartment 52 connected to a discharge or emptying device. The wall 48 has, at a predetermined height, a connection orifice 54, in which a sealing sleeve 22 is fixed, the inlet 36 of which is oriented towards the intake compartment 50. The valve 10 is then threaded into the sleeve 22, and the actuation of the leaf 16 by means of the chain 28

  allows either to close or open the connection orifice 54 regulating the leak rate.

  In the event of accidental pollution of the water in the retention basin, for example by hydrocarbons, the valve 10 is closed, and the hydrostatic pressure upstream reinforces the contact pressure exerted by the first seal 24 of the leaf 16 on the orifice 14 of the body 12. The polluted water from the retention basin can be easily pumped, and afterwards leave a specific treatment

before being rejected.

  In the absence of pollution of the water in the retention basin, the valve 10 is in the open state (FIG. 6) to allow a leakage rate corresponding to the diameter of the body 12 and of the sleeve 22. The chain 28 is hooked to a hook 56 at the upper part of the wall 48, and holds the valve 10

  open, the leaf 16 then being substantially in a horizontal position.

  The water level in the retention basin corresponds to the height of

  the connection orifice 54 in the wall 48.

  In the open state of the valve 10, the leaf 16 instead of being in a horizontal position as illustrated in FIGS. 5 and 6, could be arranged vertically against the wall 48, to avoid any damage due to

swirling effects of water.

  Access to the intake compartment 50 of the manhole 46 is facilitated by a series of steps 58 extending to the valve 10. The valve 10 according to the invention has simple handling, and is easily repairable in the event of '' operating or leakage anomaly. It is enough to descend the steps 58 of the gaze 46 to carry out the maintenance of the

  valve 10, which can be removed from the sealing sleeve 22 with seal 38.

  The shutter valve 10 and the sealing sleeve 22 are made of a rigid plastic machine, resistant to hydrocarbons, in particular

polyvinyl chloride PVC.

  The counterweight 26 can of course be inserted by overmolding in the

clapper 16.

Claims (7)

  1. A shutter valve device, in particular for a water retention basin, comprising a fixed tubular body (12) with orifice (14) truncated on which is adapted a movable leaf (16) mounted with free pivoting on an axis (18) integral with the body (12), a first seal (24) arranged on the internal face of the leaf (16) opposite the orifice (14), and a socket (20) extending the body (12 ) opposite the orifice (14), characterized in that: - a counterweight (26) is fixed on the external face of the leaf (16) below the axis (18) of articulation so as to urge the valve (10) by gravity to the closed position and to maintain it in this position with a predetermined contact pressure, - a control means cooperates with the leaf (16) to raise it by manual actuation to a position of opening, - and the first seal (24) is bonded to the entire internal surface of the leaf (16), and is produced made of an elastomeric material having strength high chemical.   2. A shutter valve device according to claim 1, characterized in that the male socket (20) of the body (12) is intended to be introduced into a sealing sleeve (22) having an inlet (36) equipped with 'a second sliding seal (38).   3. A shutter valve device according to claim 2, characterized in that the second sliding seal (38) is inserted in an annular housing (40) of the sleeve (22), and cooperates with the cylindrical lateral surface of the socket (20).   4. A shutter valve device according to claim 1, characterized in that the axis (18) of the pivoting of the leaf (16) comprises a middle part glued in a protuberance (30) radial to the body (12), and two opposite projecting ends on which two legs are mounted with clearance   hinge (32, 34) of the leaf (16).   5. A shutter valve device according to claim 1, characterized in that the control means comprises a chain (28) fixed to the counterweight (26) by assembly means.   6. A shutter valve device according to any one of claims.   previous, characterized in that the axis (18) extends horizontally   above the body (12), the orifice (14) truncated forming an acute angle close to 30   with the vertical direction passing through the axis (18).   7. A shutter valve device according to any one of claims.   above, characterized in that the body (12) and the leaf (16) of the valve (10) are made of a rigid plastic material, in particular polychloride vinyl.