FR2516627A1 - KEY VALVE, IN PARTICULAR A BOTTLE FAUCET - Google Patents

Abstract

THE INVENTION RELATES TO BALL VALVES. IT RELATES TO A BALL VALVE IN WHICH KEY 1 HAS A CYLINDRICAL OR TRUNCONIC AND EVEN SPHERICAL SHAPE, REALIZED SO THAT THE PARTS 3 WHICH ARE IN CONTACT WITH THE SEALING RINGS WHEN THE VALVE IS OPEN ARE CLOSER THAN THE PARTS 4 WHICH ARE IN CONTACT WITH THE SEALING RINGS WHEN THE RING IS CLOSED, SO THAT THE CONTACT PRESSURE IS INCREASED IN THE CLOSED POSITION OF THE VALVE. APPLICATION TO BALL VALVES AND BALL VALVES.

Description

The present invention relates to a valve of the type which comprises a key

  rotary type, for example a ball valve or a spherical valve, and of the type which comprises a valve body having at least two ports for external connections and an orifice provided with a rotating shaft for rotating the key that is supported so that it can rotate and that can rotate around an axis of rotation by establishing

  at least one closing position and a position of

  valve key, the key comprising for this purpose at least one equatorial region having at least one bore and being successively conducted at a sealing ring placed at one of the connection ports of the body during

  the rotation of the key around its axis of rotation.

  The valve according to the invention is characterized in that the key, in the closed position of the valve,

  cooperates sealingly with a sealing ring, followed by

  an annular contact zone farther from the axis

  rotation of the key than the surface of this key to

  very locations of the equatorial zone.

  In this way, a valve of the aforementioned type is

  such that, in the opening position of the faucet, the

  against the rotation of the key in the closing direction, is relatively low or zero since the contact between the key and the sealing rings takes place at a contact pressure lower than that which is exerted in the closed position of the valve Thus, the valve has a greater duration of use between the exchanges of the sealing rings, this characteristic being obtained as well because of the reduced pressure

  applied to the sealing rings in the open position

  than the fact that the edges of the bore

  the key pass in front of the ring with a pressure of

  contact against the rings which is much lower than the contact pressure applied by the key in the valve closing position The contact pressure applied to the sealing ring in the closed position of the valve

  faucet can be, because of the characteristics of con-

  the valve, which is greater than the contact pressure inside the valves of known type in which the contact pressure is such that the closure of the tap requires the application of a rotational force up to a maximum value of 75 N m whereas, in the case

  of the valve according to the invention, it is possible to obtain a pressure

  sealing contact such as a rotational force

  the order of 350 N m shall be exercised in accordance

  rotating valve, that is, corresponding to a sealing pressure which is about five times

  to that obtained so far by means of the

  spherical cup or ball valves of the type known to

  tuellement. Each equatorial zone having the greatest distance mentioned above in the center of the key or in the axis of rotation is preferably made with a width greater than the largest diameter of the face of the sealing ring which is in contact with the key. in this way, the total contact surface of the sealing rings ensures the application of the same sealing pressure or contact against the key in all the positions of

closing the key.

  In this case, the key has a cylindrical or conical shape and the equatorial zone of the key, that is to say the aforementioned zone which, during the rotation of the key, passes at the level of the contact region of the key. sealing ring, is advantageously formed by pairs of sections having conical or cylindrical surfaces and disposed facing, these sections having the same configuration so that at least one pair of these cylindrical or conical surface sections placed opposite simultaneously a common axis and is at a greater distance from the axis of rotation of the key than in the case of the remaining pairs of sections

  above mentioned cylindrical or conical surface This characteristic

  It is precisely concerned with a preferred embodiment of

  keys of cylindrical or conical type according to the invention.

tion.

  In the case where the valve is a spherical valve

  the equatorial zone of the key is preferably

  by pairs of spherical surface sections facing each other, having the same curvature, so that, simultaneously,

  nally, at least one pair of spherical surface sections

  placed at the same center and is at a greater distance from the center of the sphere than in the

  case of the remaining pairs of spherical surface sections.

  This is a characteristic of a way of realizing

  the valve according to the invention in the form of a spherical valve since only part of the equatorial zone of the key must have its center on

the axis of rotation of the key.

  The pair of conical surface sections, cylindrical,

  drique or spherical, having no bore, has

  on the key, the greatest distance to the center of the sphere or to the axis of the key so that, simultaneously, all the surface segments having a bore are at a shorter distance from the center of the sphere or of the axis of the key In this way, the greatest pressure

  contact applied by the key against the rings of

  tightness inside the body between the rings and the pair

  of surface segments formed on the key having no

wise, is preserved.

  The sealing ring placed at each of the body orifices which are intended to be connected,

  in front of the equatorial zone of the key, is preferably

  fixed to the body, and simultaneously the key,

  in the equatorial zone with bores, always remains

  In this way, an embodiment is such that the holes of the bores of the key never come into contact with the seal ring.

  the sealing ring whose life can be increased

  that the wear due to the above-mentioned orifices is suppressed.

  Other features and advantages of the

  will become apparent from the following description,

  made with reference to the accompanying drawing in which

  Figure 1 is a key perspective

  according to the invention; Figure 2 shows the key of Figure 1 in side elevation; Figure 3 shows the key of Figure 1 but in front elevation; Figure 4 is a section of a variant along the line I-I of Figure 3; Figure 5 is a section along the line IIII of Figure 3; Fig. 6 shows an embodiment having planar surfaces at the bore; and

  Figure 7 shows a sealing ring.

  FIG. 1 represents a key 1 according to the invention

  for a spherical valve The key has a

  wise 2 having an orifice in a spherical surface portion 3, at a smaller distance from the center of the sphere than a spherical surface portion 4 which does not have a bore A at its upper part, the key has a surface 5 in the middle of which is disposed a stop 6 of parallelepipedal shape intended to be in contact with a rotary control shaft (not shown) passing

  in the body (not shown) of the tap, the rotation shaft

  key at the end of the coupling on the key having a notch shape complementary to that

stopper 6.

  Figure 2 shows the same key in elevation

  side, with rounded transition faces

  This key is of the unidirectional type because it has a single bore, but according to the invention, the key can be of two or three-way type,

  in the form of a ball valve or ball valve.

  The key 1 can rotate about an axis of rotation 7 and the spherical surface 4 has its center which coincides with the center 8 of the key In the embodiment considered, the center of the sphere is at the point of intersection of the axis 7 of rotation and the axis 9 of the bore 2 Figure 2 shows the equatorial zone 10 of the key, that is to say the area which, during the rotation of the key 1 passes successively opposite a sealing ring placed in the body FIG. 7 represents an embodiment of a sealing ring 12, the contact zone 14

  of the ring which seals against the key when

  that it is in the closed position, is represented in

  oblique position in relation to the plane of the

  A inner stop 16 formed in the ring is des-

  in practice to reduce the noise created by the valve when in the closed position, in the embodiments in which the surface 3 also comes into contact

  of the ring 12, the contact pressure being, however,

pick.

  Key 1 is represented in frontal elevation

  in Figure 3, same as the equatorial zone 10.

  FIG. 4 represents a section along the line II of FIG. 3, but in one embodiment in which the stop 6 is replaced by a cavity 18 intended to cooperate with the rotation control shaft. The broken lines represent the usual profile. 20 of the key of a conventional spherical valve, and it is thus easily understood why the key 1 according to the invention exerts a

  lower contact pressure on the sealing rings 12

  chéitéplaced in the body when the key is in the open position, contrary to the case where it is in position

closure.

  Figure 5 shows a section of key 1 in

  equatorial zone 10 along line II-II of the

  Figure 3 The mixed lines 22 represent the orbit of the

  4 spherical surface of the key 1.

  Figure 6 shows a key embodiment

  1 in which only opposed sections 4 of surface have -

  a spherical shape and have rounded transitions to flat surfaces 26 in which the bore

  2 of the key opens, and a surface 24 opposite to the sur-

  face 5 also has a flat surface The distance separating

  surfaces 5 and 24 corresponds to the width of the equi-

  In this way, a valve body of low height can be obtained and in this case all the advantages of the invention are achieved. The rounded transitions to the surfaces 26 reduce the wear of the sealing ring 12 relative to corresponding holes of bores formed in the key

spherical shape.

  Whenever several bores are formed in the key 1, in the equatorial zone 10 thereof, a single surface section having no bore and larger width, measured along the periphery of the key 1 in the equatorial zone 10, with respect to the larger diameter of the sealing ring 12, must be present, in front of the contact zone 14 of the ring with the key 1.

  contact is smaller than the surface segment does not

  The holes in the body that are intended to be connected, which can be protected by the surface segments that are outside the bores of the key 1, are all in radial view in front of the equatorial zone. but the body may comprise other orifices which may be connected and which, for example, may be arranged in front of the orifice of the body intended for the passage of the shaft of

control of the key.

Claims (7)

  1 tap of the type which comprises a rotary key,   such as a spherical valve or a wood faucet-   bucket, of the type having a body having at least two ports for forming external connections and a hole for the passage of a rotating shaft for rotating the key which is supported so that it can rotate about an axis of rotation by determining at least one closed position and one open position of the valve, the key comprising   effect at least one equatorial zone having at least one   wise and passing successively in front of a ring of   a gap placed at one of the connection ports of the body, when the key is rotated about its axis of rotation, said valve being characterized in that the key (20), in   the closed position of the faucet cooperates with   with the sealing ring (12) along a ring-shaped contact zone further from the axis of   rotation (7) or center (8) of the key (1) that the sur-   face (3, 26) of the key (1) at other locations of the equatorial zone (10).   2 tap according to claim 1, characterized in that each zone (4) of the contact or part of the equatorial zone is at the greatest distance from the center (8) or from the axis of rotation (7) of the key ( 1) has a width (30) greater than the largest diameter of the contact face (14) of the baque   seal (12) with the key (1).   3 tap according to one of claims 1 and 2,   of the plug type having a cylindrical or conical key, characterized in that the equatorial zone (10) of the key, that is to say the area which, during the rotation of the key, passes under the contact zone of the sealing ring (12) is formed by pairs of conically or cylindrically conical surface sections having the same configuration, so that at least one pair of these cylindrical or conical placed opposite a common axis (7) and is at a greater distance from the axis of rotation (7) of the key (1) than the other pairs of specific surface segments cylindrical or conical.   4 Tap according to one of claims 1 and 2, of the type of a spherical valve, characterized in that the equatorial zone (10) of the key (1) is formed by pairs of spherical surface sections (3, 4) placed in   look and have a moem curvature, so that, simultaneously   nally, at least one pair of spherical surface sections facing each other (4) has the same center (8) and is located at a greater distance from the center (8) of the sphere (1)   the remaining pairs of spherical surface segments (3).   Valve according to any one of the claims   1 to 4, characterized in that the pair of sections of sur-   face (4) conical, cylindrical or spherical, having no bore, has the greatest distance to the center (8) of the sphere or to the axis (7) of the key thereon, and simultaneously, each surface section (3, 26) having a bore is at a shorter distance   center <8) of the sphere or axis (7) of the key (1).   6 Tap according to any one of the claims   1 to 5, characterized in that the sealing ring   (7) disposed at each of the body orifices for   rope, in front of the equatorial zone (10) of the key (1), is fixed to the body so that, simultaneously, the key   (1), in the equatorial zones (3, 26) with   stay away from the sealing ring (12).   7 tap according to one of claims 4 and 5,   characterized in that the sealing ring (12) has a bu-   radially oriented, inwardly directed tee (7) at an obtuse angle with the surface (14) of the ring   seal (12) which is in contact with the key (1).