FLOATING SPLIT BUTTERFLY VALVE

Abstract

The object of the invention is a floating split butterfly valve that allows connection of two processing devices or containers in a way that one of the devices (e. g. a transport device or a container) is closed by one half of the valve (passive part) while the other device (e. g. a stable device or a container) is closed by another half of the valve (active part), wherein the material (powder and/or liquid substance) transferred from one device/container into another device/container cannot get trapped in dead corners of the valve and does not get accumulated in the equipment. The construction of the floating split butterfly valve of the invention provides for the fact that due to the arrangement of shafts (5, 5a) of split flaps (2, 2a) in a housing of an active and a passive part of the valve via displaceable (floating) hinges (3, 3a), seals (1, 1a) of the active and passive parts of the valve are flush with the level of the split flaps (2, 2a) on the active and passive parts, when the valve is in a closed position, while the seals (1, 1a), while in an opened position, are arranged by a distance X higher than valve housings (4, 4a) and the flaps (2, 2a) and the seals (1, 1a) remain on the same level due to clearance S1=X.

Claims

1. A floating split butterfly valve characterized in that shafts (5,5a) of split flaps (2,2a) are arranged in a housing of an active and a passive part of the valve via displaceable hinges (3,3a), such that seals (1,1a) of the active and passive parts of the valve are flush with the level of the split flaps (2,2a), when the valve is in a closed position, while the seals (1,1a), while in an opened position, are arranged by a distance X higher than valve housings (4,4a), the flaps (2,2a) and the seals (1,1a) remaining on the same level due to clearance S1=X.

Description

[0007] The invention will be explained in more detail by way of an embodiment and the belonging figures, in which:

[0008] FIG. 1 shows a top view on one half of a flap valve;

[0009] FIG. 2 shows a detail of split flaps in the open position of the valve in sectional view B-B;

[0010] FIG. 3 shows a detail of split flaps in the open position of the valve in sectional view A-A;

[0011] FIG. 4 shows a detail of split flaps in the closed position of the valve in sectional view B-B;

[0012] FIG. 5 shows a detail of split flaps in the closed position of the valve in sectional view A-A.

[0013] In a floating split butterfly valve of the invention, shafts 5,5a of split flaps 2,2a are arranged in a housing of an active and a passive part of the valve via displaceable (floating) hinges 3,3a, such that seals 1,1a of the active and passive parts of the valve are flush with the level of the split flaps 2,2a, when the valve is in a closed position, while the seals 1,1a, while in an opened position, are arranged by a distance X higher than valve housings 4,4a, the flaps 2,2a and the seals 1,1a remaining on the same level due to clearance S1=X. In this way, the seals 1,1a do not pull fine particles of the material being transferred (powder and/or liquid substance) into the contact edge of the flaps 2,2a and the seals 1,1a when the valve is unloaded.

[0014] In disconnecting the valve, the seals 1,1a would project from the level of the flaps 2,2a if the split flaps 2,2a had not been mounted in a displaceable (floating) manner. This would result in contamination of the surface of the contact corner between the flaps 2,2a and the seals 1,1a from the inner side by the particles pulled by the seals 1,1a.

[0015] Sealing between both flaps 2,2a is provided for by a somewhat longer seal (X), this is shown in FIG. 3. The split shafts 5,5a of the flaps 2,2a are mounted into displaceable (floating) hinges 3,3a. The force P needed to achieve adequate mounting of the split flaps 2,2a is provided for by the seals 1,1a in the opened position and during a transfer to the closed position.

[0016] When passing from the opened position to the closed position, where the seals 1,1a get compressed vertically, the position of the hinges 3,3a moves downwards by a distance equal to the distance of compression of the seals 1,1a (height S1=X). This fact provides for frontal alignment of the split flaps 2,2a with the seals 1,1a.

[0017] In the closed position, the position of the split shafts 5,5a of the flaps 2,2a is conditioned by the geometry of the hinges 3,3a and the geometry of the split flaps 2,2a.

[0018] To provide a more precise understanding of the function of the floating flaps 2,2a, FIGS. 2, 3 and 4, 5 show the arrangement of the floating split flaps 2,2a.

[0019] In the opened position of the split flaps 2,2a of the flap valve, FIGS. 2 and 3 show a detail of mounting of the floating flaps 2,2a in the displaceable (floating) hinges 3,3a. The seals 1,1a exert pressure in direction of the force P onto the shafts 5,5a of the flaps 2,2a. The radius of the split shafts 5,5a of the flaps 2,2a corresponds to the radius of the hinges 3,3a, such that there is no clearance between the hinges 3,3a and the split shafts 5,5a, S2=0.

[0020] Although the seals 1,1a lie higher than the housings 4,4a of the active and passive parts of the valve by the distance X, the seals 1,1a and the flaps 2,2a are flush due to the force P and the geometry of the hinges 3,3a and of the shafts 5,5a.

[0021] In the closed position of the split flaps 2,2a of the flap valve, FIGS. 4 and 5 show a detail of mounting of the flaps 2,2a with the displaceable (floating) hinges 3,3a.

[0022] The seals 1,1a are deformed by X+X and the split flaps 2,2a are in a closed position as shown in FIG. 5.

[0023] Both parts of the split shaft 5,5a of the flaps 2,2a match the inner diameter of the hinges 3,3a, so there is clearance S1=X=0 between the hinges 3,3a and the split shafts 5,5a. This is shown in FIG. 4.

[0024] The floating split butterfly valve sufficiently solves the set technical problem by way of the above-described arrangement of both parts of the split shafts 5,5a of the flaps 2,2a, such that clearance occurs between the hinges 3,3a and the split shafts 5,5a, said clearance providing for the fact that, when the flap valve is in the opened position, the seals 1,1a in both valve housings 4,4a lie by the distance X higher than the edge of each valve housing 4,4a, while the seals 1,1a are flush with the edge of each housing 4,4a, when the valve is in the closed position.