Valves and valve actuation – Valve – Bodies
Patent
1991-07-22
1993-06-08
Chambers, A. Michael
Valves and valve actuation
Valve
Bodies
251366, F16K 100
Patent
active
052172058
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a sheet metal component which serves as a dividing wall, as well as a carrier of the seating surface, of a gate valve and, in the valve housing, is disposed in a plane intersecting the transverse and longitudinal axes of the valve housing.
The German patent 638 462 discloses a sheet metal component which functions as an intermediate floor and a carrier of a seating ring. The sheet metal component is welded inside a valve housing via a circular seam in such a manner that the opening which receives the seating ring is normal to the axis of the flow path in the valve. The wall formed by the sheet metal component in the flow path, and the strong deflection of the flow at the valve seat, cause large flow losses.
A housing for shutoff elements is known from the European patent application 0 032 183 and has a sheet metal component which assumes the function of the dividing wall and the seating ring carrier. The sheet metal component is designed and arranged similarly to that described previously. It is further provided with a protuberance in which a conventional or specially made valve seat is secured. This valve, also, has the drawback of large flow losses.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a sheet metal component which serves as a dividing wall and a carrier of the valve seating surface, is inexpensive and has favorable flow conducting characteristics adjusted to the nature of the valve housing.
The object set forth is achieved a sheet metal component comprising a plate provided with a conically calibrated, outwardly directed flange which is inclined to the plate and defines the seating surface for the valving element.
The sheet metal component of the invention makes it possible to provide a large flow opening on the axis of the connections because the wall portion acting as a dividing wall between the inlet and outlet regions can be small. This also yields the advantage that a valve housing equipped with such a dividing wall has little susceptibility to fouling. An additional advantage is that the design of the sheet metal component creates a flow which, due to its pressure distribution, produces a rinsing effect in the region of the seat endangered by fouling. The small amount of material consumed by, and the simple manufacture of, the sheet metal component of the invention constitute further advantages. A contributing factor here is that this sheet metal component defines the seating surface for the valve so that no additional part need be used and secured.
In principle, gate valves having a seating surface inclined to the flow direction are known from the German Offenlegungsschrift 36 09 772. However, in the gate valve illustrated in this publication, the part with the seat is integral with the housing. It is also designed differently from the sheet metal component of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in greater detail with reference the accompanying drawings wherein:
FIG. 1 shows a gate valve with a housing of sheet metal, and
FIG. 2 is an enlarged detail view of the sheet metal component of FIG. 1 forming the dividing wall and the housing seating surface.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The gate valve shown in FIG. 1 has a sheet metal housing 1 in which the sheet metal component 3 forming the dividing wall, as well as the seating surface for a valving element 2, is welded. The elliptical opening of the sheet metal component 3 is so large that the sheet metal component 3 presents little surface area to resist the flow of a fluid stream conducted through the valve housing 1. In principle, this also applies for a stream flowing in the other direction; however, additional advantages are achieved for the above-mentioned flow direction. On the one hand, as can be readily seen, the outline of those surfaces of the sheet metal component 3 which are disposed in the flow path are responsible for this. On the other hand, the lower region of an outwardly directed flange
REFERENCES:
patent: 1148119 (1915-07-01), Patterson
patent: 2737201 (1956-03-01), Clair et al.
patent: 3077029 (1963-02-01), Kaye
patent: 4484596 (1984-11-01), Hikade
Bartoschek Manfred
Lovisetto Primo
Chambers A. Michael
Kontler Peter K.
KSB Aktiengesellschaft
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