Valves and valve actuation – With means to increase head and seat contact pressure – Gate valve
Patent
1996-01-16
1997-09-16
Fox, John
Valves and valve actuation
With means to increase head and seat contact pressure
Gate valve
251326, F16K 316
Patent
active
056671962
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a slide valve to close large fluid conduits, in particular a double-disk slide valve, according to the precharacterizing clause of claim 1.
Slide valves of this kind, in particular double-disk or spectacle-type slide valves, are generally known, in particular due to the applicant. In this regard reference is made to the prospectus No. 103 I/85, Spectacle-Type Valve II, of Zimmermann & Jansen GmbH, and to the German patent DE-C-40 11 274. The known double-disk valves are used when it is required that the flow aperture of the valve be sealed off from the surroundings, in particular from the interior of the valve housing, when the valve is in the open position. This is the case especially when the fluid is a gas contaminated by sublimating substances, because in the absence of a leakproof seal such substances could be deposited in parts of the housing and cause a complete blockage, thus preventing actuation of the valve. For similar reasons valves of this kind are used for gases that contain dust as well as for heavily contaminated liquid media, e.g. in coal-to-gas plants, combustion plants, chemical plants, pipelines and the like.
Because double-disk valves are heavy installations, it is important for the slide gate to be easily movable. Furthermore, the slideway should be so constructed that it is fully functional in any desired orientation of the valve, i.e. standing vertically, hanging vertically or lying horizontally, with no need for special structural alterations.
It is thus the object of the present invention to produce a slide valve, in particular a double-disk slide valve, the slide gate of which moves easily in its slideway while ensuring that the slideway remains functional regardless of the orientation of the installed valve.
SUMMARY OF THE INVENTION
This object is achieved by mounting the slide gate on roller bearings within the valve housing, in such a way that the rollers support the gate radially with respect to its movement direction, on all sides. The mounting of the slide gate on rollers ensures freedom of movement. The arrangement of the rollers allows the slide valve, and hence the gate, to be installed in any desired orientation, either standing upright, hanging vertically, or lying either horizontally or at an angle. Functionality in any orientation is preserved by the arrangement of the bearing rollers in accordance with the invention.
Preferred structural details of the principle of construction are provided in accordance with the invention. Of special interest includes having the slide gate is bounded on one narrow side by a guide member having an outer profile and configuration or shape, and preferably a polygonal round-rod or tubular pile, against which bearing rollers rotatably disposed in the valve housing can roll, the bearing rollers being disposed in an approximately star-shaped array with reference to the long axis of the profile. This arrangement ensures that the slide gate is held on all sides radially with respect to its direction of movement. On the opposite narrow side of the slide gate, it suffices to arrange the bearing rollers so that they roll against a flat surface.
The bearing rollers are preferably each individually adjustable against the associated longitudinal guide surface of the slide gate, so that the gate is guided longitudinally without play. Above all, this measure allows manufacturing tolerances to be compensated.
A feature independent of the above-mentioned roller mounting of the slide gate, but which can also be combined therewith, includes a construction in which the slide gate can be moved back and forth by a toothed-rack or chain-wheel drive. The latter drive comprising a chain attached to the gate on one side, preferably a narrow side, and a chain wheel that engages the chain and is operationally connected to a drive mechanism. The drive mechanism is preferably an electrical or hydraulic motor. The chain wheel is disposed in a housing flange-mounted, so as to form a gastight seal, on the valv
REFERENCES:
patent: 3527440 (1970-09-01), Presslauer
patent: 3768773 (1973-10-01), Stephens
patent: 3907250 (1975-09-01), Kane
patent: 4235256 (1980-11-01), Crawshay
patent: 4482296 (1984-11-01), Bachmann
Fox John
Zimmermann & Jansen GmbH
LandOfFree
Slide valve to close large fluid conduits, in particular double- does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Slide valve to close large fluid conduits, in particular double-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slide valve to close large fluid conduits, in particular double- will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-213035