FR2543646A1 - Tap intended to interrupt the circulation of a fluid in a pipe - Google Patents

Abstract

The subject of the invention is a tap intended to interrupt the circulation of a fluid in a pipe. According to the invention, the tap is composed of a body, or metal overall shell 1, of flattened circular shape, hollowed out in its central part, and provided with a central channel passing through in the longitudinal direction, having a narrowed extension, or neck 2, at its upper end which neck is hollowed out in its internal part 4 and which, on the outside, is flattened into a head or flange 3 and provided with a central spindle 5 which emerges to the outside, on its upper end side and which comprises a central part 8 of smaller diameter and which is provided with a butterfly valve 14 housed in the central hollow.

Description

 The present invention relates to a valve intended to interrupt the circulation of a fluid in a pipe.

 The new tap has a special configuration intended to lighten it and consequently to significantly reduce its cost price, without however losing its rigidity and resistance, thanks to reinforcing ribs arranged at the level of the lightened areas.

 According to another imperturbable characteristic, an elastomer coating is provided which covers the metallic core of the butterfly and which has profiled, corrugated shaped bds, which, at times of greatest pressure, create a vacuum zone. , determining its perfect adhesion to the walls of the body in order to achieve a perfectly hermetic seal, which allows it to withstand high pressures exerted by the fluid flowing in the pipe.

By way of non-limiting example, an embodiment of the invention has been described, with reference to the appended drawing, in which:
Figure 1 is a front view of the body of the rebinet.

 Figure 2 is a lengitudinal sectional view of the valve of FIG. 1.

Figure 3 is a cross-sectional view of the valve, and
Figure 4 is a top view of the valve butterfly.

 The tap shown consists of a flattened circular metal body (1) with an upper neck (2) ending in the form of a flange (3), this neck having an axial hole in the transverse direction and a longitudinal through channel . This body will be reduced over its entire periphery, it is trapezoidal (16) and is provided at diametrically opposite points with reinforcing ribs (12).

 In the neck area (2) it has an internal recess (4) intended not only to lighten the device but also to serve as a housing for any type of control or actuation mechanism.

 The neck is traversed, longitudinally, by a spxe (5) which is fixed at its upper part by a clip (6) which is located in the region of the recess (4), while its lower part is crossed by a fixing pin (11), this axis comprising, in its central part, a zone of smaller diameter (8) and, in its upper and lower parts, seals (7) and (10).

 The body of the adjustment butterfly is mounted on the axis (5) and is placed in the central recess area of the body (1), this butterfly being composed of a metallic core (14) covered with a coating of elastomer (9), the edges (15) of which are profiled in a wavy shape @ so that their central zones are concave and their side zenes are convex, towards the outside.

 Finally, the body of the tap, as regards its external part, carries housings intended for lateral seals which interfere with the flanges of the pipes.

 The structure of the body (1) is perforated, due to the peripheral reduction of its diameter (16) and of internal recess (4), sufficiently lightened to bring about an obvious improvement in relation to taps or valves. other types, while the existence of reinforcing ribs (12) contributes to maintaining the resistance of the device.

 Regarding the butterfly, the profiled shape of its edges (15), taking into account the use of elastomer for its surface layer, ensures that, when the butterfly is subjected to pressure, its twists are deformed if necessary is, thus creating a vacuum which, acting as a suction cup allows them to adapt perfectly to the walls, by a perfectly smooth contact surface, so as to prevent any possibility of leakage of the liquid circulating in the pipe and guaranteeing at the same time strong resistance to pressure.

Claims (8)

 1 - Tap intended to interrupt the circulation of a fluid in a pipe, characterized in that it consists of a body, or general metallic carcass (1), of flattened circular shape, hollowed out in its central part, provided a central channel traversing in the longitudinal direction, having at its upper part a narrowed extension, or neck (2), which in its internal part (4) is hollowed out and which, on the outside, is flattened into a head or flange (3), with a central axis (5) which emerges on the outside, on the side of its upper end, and which has a central part (8) of smaller diameter, and which is endowed with a butterfly ( 14) housed in the central recess.  2 - Tap according to claim 1, wherein the main body has, towards the outside, a peripheral recess of trapezoidal section intended to lighten it.  3 - Tap according to claim 2, wherein are provided in the peripheral lt4videment of the main body, at diametrically opposite points, reinforcing ribs.  4 - Tap according to claim 1, wherein the central axis is maintained at its upper part by means of a clip which is housed in the hollowed-out area of the neck and, at its lower part, by means of a pin.  5 - Tap according to claim 1, wherein the central axis comprises, in its upper and lower parts, O-ring seals.  6 - Tap according to claim 1, wherein the butterfly consists of a central metal core, coated with an elastomeric material.  7 - Tap according to claim 6, wherein the lateral profile of the butterfly, in the area corresponding to the elastic coating, has a wavy shape with a concave central part, extended by convex edges, which acts as a suction cup, thus ensuring a application area on the contact surface, perfectly straight.  8 - A valve according to claim 1, in which the valve body comprises lateral housings intended to receive seals, at its lateral contact with the flanges of the corresponding pipe.