CN111295487B

CN111295487B - Siphon with air vent

Info

Publication number: CN111295487B
Application number: CN201880071481.1A
Authority: CN
Inventors: A·巴库特; V·勒盖; F·洛朗; C·勒罗伊; G·勒比汉; D·勒库恩特
Original assignee: Wirquin Plastiques SAS
Current assignee: Wirquin Plastiques SAS
Priority date: 2017-11-02
Filing date: 2018-07-18
Publication date: 2021-06-18
Anticipated expiration: 2038-07-18
Also published as: EP3704320A1; FR3072983A3; CN111295487A; PL3704320T3; EP3704320B1; FR3072983B3; WO2019086772A1; ES2895000T3

Abstract

Siphon with waterproof seal, comprising a vent (16, 3) to perform an anti-siphon function, characterised in that it comprises an annular valve (2) positioned in a chamber (13) of the body (1) of the siphon, the valve (2) coaxially surrounding the longitudinal axis of a pipe (8) for discharging waste water, the valve (2) being intended to regulate the air supply from the opening (16, 3) to an outlet (11) connected to the outflow pipe, characterised in that the annular valve (2) is broken in a discontinuous ring and constitutes two branches (31, 32) terminated by an end (23).

Description

Siphon with air vent

On the discharge pipe of the sanitary fixture, there is a siphon with water resistance, in order to avoid an increase in odour.

When multiple discharge streams are connected to the same pipe, or when the discharge streams have a large slope/length, overpressure/underpressure phenomena occur, which can lead to dissipation (suction) or increased odour (overpressure) during the discharge of the objectionable discharge.

To overcome one of these unpleasant situations (dissipation), technical solutions exist, such as ventilation of the outflow pipe. Other proposed solutions are the ventilation of the outflow pipe (implemented as a ventilation device), or the addition of a ventilation device with a valve downstream of the siphon, or also the provision of a water siphon previously equipped with a ventilation system, in order to prevent the creation of low pressure conditions.

In the siphon integrated vent solution (i.e. upstream of the connection to the drain), there are different embodiments, namely:

-creating a vent downstream of the siphon (for example described in patent document No. GB 2041422) having a valve placed on a projection integral with the body of the siphon, which, at rest, blocks the inlet at the downstream portion of the siphon. In the event that the outflow tube is low pressure, the valve will lift and allow air to enter the outflow tube. The low pressure occurring in the downstream pipe is neutralized by the device, so that the dissipation of the siphon during the discharge is avoided.

A more specific example of creating a vent downstream of the siphon (described, for example, in patent documents with publication numbers FR1373089 and US 4212314) is that, at rest, the concentric valve blocks the air inlet. If there is a low pressure in the outflow pipe, the concentric valve will rise, allowing air to enter the pipe. The low pressure occurring in the downstream pipe is neutralized by the device, so that the dissipation of the siphon during the discharge is avoided.

In the same way as the previous solutions, the text of the patent documents with publication numbers KR20130125465 and US4524795 mentions siphon models with concentric vacuum vents, whose internal ducts can interact with the downstream ducts. The low pressure present in the downstream pipe is therefore neutralized by the device, avoiding the dissipation of the siphon during the discharge.

The geometry of the annular valve is also specified in the patent document with publication number JP2004036114, which deforms only by its internal diameter in the presence of low pressure in the pipe to let air pass.

In a technical embodiment of the annular valve inside the body of the siphon, the valve has a concentric geometry, having the shape of a substantially flat ring.

In these cases, the entire ring (valve) can be raised to allow air to pass, or only a portion of the circumference deformed to allow air to pass, in the case of low pressure.

The solution proposed for the invention, with the valve inside the siphon, is shown in the following document.

For this reason, the geometry of the valve differs from the mentioned solutions. In fact, in order to improve the opening of the valve, it has the shape of a "horseshoe", i.e. discontinuous ring, broken ring. It is arranged on a support to ensure sealing against possible overpressure in the outflow conduit at rest.

The main characteristics are the shape of the valve: in a discontinuous ring shape, the end of the valve can be raised without having to raise the valve completely. Thus, the flexibility of the material makes it possible to achieve fineness of the opening degree and material gain in production. Likewise, the missing portion of the ring allows clearance for connection to the outflow tube.

It is also possible to have two valve domes of different hardness.

In this case (not shown) these are two arches mounted in the siphon.

Another particular feature is the provision of a support member which is slightly inclined to the air inlet of the downstream conduit. Thus, if the waste water reaches the valve during overpressure in the pipe, the waste water will naturally fall back towards the pipe during the pressure rise (e.g. in case of a blocked, clogged pipe).

Another feature is the presence of "lateral" air passages, which are concentrically disposed inside/outside, as opposed to the patents mentioned above. In fact, the path of the air towards the duct is preferably formed at the end of the valve, more particularly in the free position left by the unclosing of the ring (the valve is "horseshoe").

Other characteristics and advantages of the invention will become better apparent from the following description of a preferred embodiment thereof, given by way of simple illustrative and non-limiting example, with reference to the accompanying drawings, in which:

figure 1 is an exploded view of the assembly.

Figure 2 is a view of the installed assembly;

FIG. 3 is a cross-sectional view of the siphon tube assembly;

figure 4 is a view of the outlet side;

figure 5 is a perspective view of the valve mounted on the body of the siphon tube;

figure 6 is a perspective view of the valve mounted on the body of the siphon in an open position;

figures 7, 8, 9, 10 and 12 are views of a valve according to the invention;

figure 11 is a perspective view of the top of the body of the siphon for housing the valve;

figures 13 and 14 are diagrammatic views of the air intake;

figures 15 and 16 are views showing the mounting of the support for the tube on the body of the siphon.

As shown in fig. 1 to 5, the siphon according to the present invention is decomposed as follows:

an inlet pipe 8 through which the waste water of the toilet flows out of the opening 9, the pipe constituting a connection to the toilet,

a nut 7 for screwing on the plug body, brought back by the plug body to the toilet for flushing;

a support 6 for the tube 8 comprising a seal 29 guiding said inlet tube 8, the support 6 comprising a functional assembly 18 having a portion 28 for being clamped on the body 1.

A body 1 integrating a ventilation function, defining a path for eliminating the air flow at low pressure in the outflow duct.

Quick-screwing base 10.

The body 1 combines the first openings 16, the points being peculiar in this body 1 in that there is a surface 15 for the setting of the valve 2, the interconnection of air being formed by the channel 17 and the orifice 12 at the outlet 11 of the body 1 of the siphon, the duct 5 defining a watertight valve, the receiving system at the outlet of the quick nut being connected to an outflow pipe, the screw thread being able to connect the seat 10 to the bottom of the body 1.

The proposed system operates:

during flushing (see fig. 3), the waste water is discharged through an opening 9 of an inlet pipe 8 at the top of the siphon. The waste water then passes through the conduit 5 of the body 1 connected to the siphon tube, rushes into the seat 10 and then rises into the body 1 to escape through the outlet 11 of the body 1 towards the outflow pipe, not shown.

In the case where the outflow pipe 11 is subjected to a depression phenomenon at the end of the discharge, there will be a "suction" of water into the seat 10, the suction corresponding to the amount of air supply provided by the opening of the valve 2 located at the top of the body 1.

In other words, the valve is used to regulate the amount of air entering from the second opening 3 and the first opening 16 to the outlet 11 connected to the outflow pipe.

The movement of the supplied air is as follows:

at the outlet 11 of the valve 1 there is a connection to a downstream outflow pipe. When the discharge is finished, a depression is provided on the outlet 11, which depression also exists in the chamber 13 between the support 6 for the tube 8 and the top of the body 1. The one or more first openings 16 and second openings 3 are located on the siphon 1 body and on the support 6 for the pipe 6, so that if the valve 2 is raised, air can rush into the chamber 13 and then migrate through the channel 17 and then the orifice 12 to the outlet 11 of the body 1, the channel 17 opening into the chamber 13 between the two ends 23 of the valve 2.

This causes the low pressure present in the outlet 11 to equalise correspondingly to the water head of the waste water in the conduit 5. When the depression is removed (the level of wastewater in the conduit 5 rises), the valve 2 turns to its low position (falls back) and re-blocks the first opening 16.

For the movement of the valve 2, it is provided in particular a valve 2 with a discontinuous or divided ring shape, intended to be placed in the chamber 13, coaxially around the longitudinal axis of the pipe 8 for discharging the waste water. The split annular shape thus forms a discontinuous ring and constitutes two

branches

31 and 32, the two

branches

31 and 32 being terminated by the end portion 23.

The two ends 23 (fig. 8) of the valve 2 are not connected. Thus, in the case of low pressure inside the chamber 13, they can rise independently of each other, as shown in fig. 6.

By the raising of the end 23, it is worth noting that air passes between the bottom of the valve and the surface 15, also from the gap between the edge of the valve 2, the outer crown 19 and the intermediate wall 30 defining the opening 4. The valve 2 does not have to be raised as a whole but can be raised locally at the end 23 by bending, so as to direct the air from the chamber 13 to the channel 17 and then to the orifice 12 leading to the outlet 11.

It is also possible to have two

separate branches

31, 32 of valves. In fact, the single valve 2 can be replaced by two

branches

31, 32 of different stiffness/flexibility, which act integrally as valves, for example the connection 33 in fig. 9 would not be present, leaving the

branches

31, 32 independent of each other.

When the water level in the orifice 12 rises, a back pressure will be provided in the chamber 13, so that the valve 2 rests flat on the surface 15 (fig. 11). In fact, the waste water rises only slowly to eventually establish an overpressure in the chamber 13, creating a seal between the valve 2 and the first opening 16, preventing the waste water from being discharged outwards.

With regard to mounting, the support 6 for the tube 8 consists of a rigid plastic part, over-moulded with a flexible material.

The intermediate portion constituted by the flexible material 29 of the support 6 is constituted by a circular opening surrounding the outflow conduit 8. The support for the tube 8 comprises a portion 28 which clips onto the lug 18 to cover the body 1 of the siphon tube, forming a seal on the external crown 19 and the intermediate wall 30. The sealing is achieved by pressing the flexible portion 34 against the intermediate wall 30 and the flexible annular portion 27 against the external crown 19 of the body 1 of the siphon tube.

In fig. 5, the valve 2 can be seen, in the rest position the valve 2 being applied on the surface 15.

In fig. 6, the valve 2 is in the raised position. It can be seen that the first opening 16 (air inlet) is released and allows air to enter the chamber 13 from the outside. These first openings 16 are created in the surface 15. This surface 15 is slightly inclined so that waste water on the valve 2 can flow out through the inlet channel 17 to the orifice 12 and then out through the outlet 11 at rest.

The lugs 14 on the surface 15 allow the valve 2 to be correctly positioned (anti-malfunction).

In fig. 7, the valve 2 is represented by a top surface comprising a through opening 20, the lug 14 being housed in this through opening 20 (fig. 5). As shown in fig. 9, the valve 2 comprises a platform 33, more specifically an area with a plane 21, which plane 21 has an outflow tract, the majority of the perimeter of which is delimited by an edge 22, which edge 22 is an extension of the platform 33 (thus the edge 22 and the platform 33 are at the same height). If waste water is present on the plane 21, the edge 22 may direct the waste water towards the end 23, then towards the channel 17 extending through the aperture 12, and then towards the outlet 11. In this case, if the outflow conduit is blocked by a blockage or restricts flow, a situation of poor drainage may occur.

In fig. 8, the valve is shown in a perspective, bottom view, with its lower surface 25 applied on the surface 15 to block the first opening 16.

Furthermore, the two

branches

31, 32 of the valve 2 may have different thicknesses and shapes/geometries. It is thus possible to have different amplitudes of movement between the

branches

31, 32 of the valve 2, so that the

branches

31, 32 can be opened to different degrees for the same low pressure in the chamber 13. The raising of the

branches

31, 32 is achieved by the bending of the branches, the middle part of the valve comprising the through opening 20, the joint 14 being inserted in the through opening 20 so as to be substantially in contact with the surface 15.

In fig. 9, some additional material can be seen on the lower surface of the valve 2 to weight the valve 2. In this case, two balls 24 can be seen in fig. 10, the balls 24 being insertable in the first opening 16 to ensure a better seal between the lower surface 25 of the valve 2 and the support surface 15 of the body 1 of the siphon tube.

In fig. 12, another way to weight the valve 2 without changing the bending capacity of the valve 2 is to add a flap 26 at the end. These flaps 26 are located in the channel 17.

In fig. 13 and 14,

channels

3 and 16 are shown, which allow air to enter the chamber 13 of the siphon. The part 28 of the support 6 clamped on the body 1 comprises a large second opening 3, which large second opening 3 can lead to the first opening 16 on the body 1. Thus, when the valve 2 no longer blocks the first opening 16, air can enter the chamber 13. The support 6 comprises an overmoulded seal which is applied by pressure when the support 6 is mounted on the external crown 19 and the intermediate wall 30. Therefore, the chamber 13 communicates with the outside only through the first opening 16 and the second opening 3.

Fig. 15 and 16 show the sealing method between the support 6 (fig. 15) and the body 1 in an inverted form. The support for the tube has an overmoulded sealing geometry, more specifically a crown made of flexible material 29 in the middle thereof, to achieve the seal between the inlet duct 8 and the support 6, the flexible portion 34 of the overmoulded seal being supported on the intermediate wall 30 of the body 1 and the flexible annular portion 27 on the external crown 19 of the body 1. Thus, a seal is achieved between the support 6 for the tube and the body 1. If the valve 2 is in fact applied on the first opening 16, the chamber 13 is normally sealed from the outside of the siphon.

Claims

1. A waterproof and ventilated siphon tube for anti-siphoning, comprising:

a body (1) comprising a surface (15) having a first opening (16);

a support (6) clamped on the body (1), the support (6) comprising a second opening (3) accessible to a first opening (16) of the body (1);

a tube (8) forming a connection to a toilet, said tube (8) being guided by said support (6);

an outlet (11);

an annular valve (2) arranged in the chamber (13),

said chamber (13) being located between said support (6) and said body (1) and opening out into said outlet (11) through a passage (17),

the valve (2) coaxially surrounding the longitudinal axis of the pipe (8) for discharging waste water, the valve (2) being for regulating the air supply from the first opening (16) and the second opening (3) to an outlet (11) connected to an outflow pipe,

characterized in that said annular valve (2) is broken in a discontinuous ring and constitutes two branches (31, 32) terminated by an end (23).

2. A siphon according to claim 1, characterised in that the branches (31, 32) of the valve (2) deform under the effect of the depression in the chamber (13), thus releasing the first opening (16).

3. A siphon according to any one of the preceding claims, characterised in that the branches (31, 32) of the valve (2) comprise a plane (21) extending below a platform (33), this plane (21) being delimited by an edge (22) of the same height as the platform (33).

4. A siphon according to claim 1, characterised in that the channel (17) opens into a portion of the chamber (13) located between the two ends (23) of the valve (2).

5. Siphon according to claim 1, characterised in that the support (6) for the tube is clamped on the body (1) of the siphon by covering it, the sealing being obtained by pressing the flexible portion (34) against the intermediate wall (30) and the flexible annular portion (27) against the external crown (19) of the body (1) of the siphon.