DE1092149B - Shut-off valve in ducts for flue gases u. ae. dusty gaseous media - Google Patents

Description

GERMAN

The invention relates to shut-off valves in ducts for flue gases and similar dusty gaseous Media with a pipe socket designed as a valve housing, which can be inserted into the channel and in which a Valve disc by means of an articulated, externally operable adjusting spindle in the one to the Housing longitudinal axis in a diagonal plane extending intermediate wall located valve opening pivotable or can be pivoted out of this. The aim of the invention is in such already known Shut-off valves a good and in every way satisfactory closing of the valve also with to guarantee difficult working conditions.

A valve closure that is always reliable can on the one hand prevented by the accumulation of impurities on the edge of the valve opening and on the valve disc that make it impossible to place the sealing surfaces close together. The other hand is to achieve a good valve closure a uniform sealing pressure over the entire circumference of the valve opening necessary.

These two prerequisites for a good closing of a shut-off valve of the type described above Art are fulfilled according to the invention in that the valve disk is dome-shaped against the valve opening is arched and carried solely by the adjusting spindle hinged at its center, which protrudes perpendicular to the partition into the housing, and that the valve disk with its on the circumference arranged conical sealing surface can be placed on the valve seat of the opening.

Due to the articulated mounting of the plate in its center on the adjusting spindle, a The entire circumference of the opening ensures uniform sealing pressure and through the placement the conical circumferential surface of the dome-shaped, arched valve disk on the valve seat the sealing surfaces secured.

In the previously known shut-off valves of the type described above, the valve disk consists of a flat disc which is pivotable about an axis extending outside the disc surface and brought to bear against an obliquely cut edge of a pipe insert can be. This extensive application of the valve disc against the front edge of the pipe insert leads however, in general not to a sufficient valve closure, since the valve seat of dust accumulation cannot be kept completely free.

The one-sided mounting of the valve disc provided in this known valve on one side The pivot pin arranged on the disc does not guarantee sufficient and even contact pressure the disc to the valve seat, especially since the

Shut-off valve in ducts

for flue gases and similar dusty

gaseous media

Applicant:

Aktiebolaget Svenska Fläktfabriken,
Stockholm

Representative: Dr.-Ing. E. Hoffmann, patent attorney,
Munich 22, Widenmayerstr. 34

Claimed priority:
Sweden 23 February 1954

Stig Gustavsson, Jönköping,

Lars-Rune Nylander, Enskede,

and Max Ydring, Stockholm (Sweden),

have been named as inventors

adjusting spindle used to actuate the known flap valve is perpendicular to the longitudinal axis of the Valve housing and thus when the valve is closed extends at an acute angle to the valve disc.

Due to the dome-shaped bulge according to the invention of the valve disk against the valve opening the advantage of a better gas flow when the valve is open is also achieved. Also allowed the articulated connection between the spindle and the valve disc in the middle ensures constant, precise centering of the plate for Ventilöffnunng, which also ensures an improved valve closure.

The valve seat arranged on the circumference of the valve opening can have a circular projection, on which the dome-shaped arched valve plate with a arranged on its conical circumference conical sealing ring can be placed. This prevents accumulations to an increased extent of impurities make it impossible to place the sealing surfaces tightly against one another. to For this purpose it can also be advantageous that the adjusting spindle carrying the valve disk is below the diagonal partition is arranged, over which one or more sliding surfaces at an angle between the side walls of the valve housing are attached, which slope towards the periphery of the valve opening to Prevent dust accumulation next to this opening.

009 630/21

The drawing shows an exemplary embodiment of the shut-off valve according to the invention. The valve housing 2 is with flanges 1 and 12 for Attaching the shut-off valve 4 provided in a channel. The valve body is through a diagonal Partition 7 divided into two halves. This partition has a circular passage opening 8 for the gas flow. A flange 6, which consists of an angle iron, extends around this opening. The angle iron can be provided with a resilient sealing ring 4.

A spherically arched valve disk 5 is provided on its circumference with a conical sealing flange 3 and at 13 articulated with an adjusting spindle 14 connected. This goes through a side wall 15 of the side housing and is in one with Stuffing box 17 provided guide sleeve 16 mounted. The spindle 14 is connected to the bearing shell by flanges 18 20 connected, which an externally spherical nut 21 receives. The nut 21 is along one threaded rod 22 slidable.

The guide rails 24 for the bearing shell 20 prevent the bearing shell from turning when the Rod 22 rotates by means of handwheel 26. The rod 22 is mounted in the bearing 25, which on a bracket 23 attached to the wall 15 rests.

On the valve housing an inspection flap 10 is provided through which the space 27 through the Wall 7 separate space 11 is accessible on one side of the valve disk. A number of sector-shaped Metal sheets 9 form sliding surfaces when the shut-off valve is attached in a vertical channel fall towards the periphery of the opening 8. These sliding surfaces are provided to prevent the accumulation of To prevent dust next to the throughflow opening 8.

Claims (4)

Patent claims: 1. Shut-off valve in ducts for flue gases and similar dusty gaseous media with a pipe socket which is designed as a valve housing and can be inserted into the channel, in which a valve disk by means of an articulated, externally operable adjusting spindle in the in a to Housing longitudinal axis in a diagonal plane extending intermediate wall 'located valve opening can be pivoted in or pivoted out of this, characterized in that the valve disk (5) against the valve opening (8) is domed and only from the one in its center hinged adjusting spindle (14) is carried, which is perpendicular to the partition (7) in the housing (2) protrudes, and that the valve disk with its conical one arranged on the circumference Sealing surface can be placed on the valve seat of the opening. 2. Shut-off valve according to claim 1, characterized in that the circumference of the valve opening (8) arranged valve seat has a circular projection (6) on which the Dome-shaped arched valve disk (5) with a conical one arranged on its conical circumference Sealing ring (3) can be placed. 3. Shut-off valve according to claims 1 and 2, characterized in that the circumference of the Valve opening (8) provided circular projection (6) from a correspondingly curved There is an angle iron flange, which has a resilient one on its end face facing the valve disk Sealing ring (4) carries. 4. Arrangement of the shut-off valve according to one or more of claims 1 to 3 in one vertical channel, characterized in that the adjusting spindle carrying the valve disk (5) (14) is arranged below the diagonal partition (7), over which one or more Sliding surfaces (9) are attached at an angle between the side walls of the valve housing (2), which drop towards the circumference of the valve opening (8) to avoid dust accumulations next to this opening to prevent. Considered publications:
German patent specification No. 605157. 1 sheet of drawings 1 009 630/21 10.60