Abstract: A shut-off valve has a housing, a wedge displaceable in the housing by a spindle, a housing opening, a cover arranged to close the housing opening and provided with a pipe, a locking screw inserted in the pipe for guiding, sealing and abutting of the spindle, and a supporting ring arranged between an outer end face of the cover pipe and an aligned collar of the screw and provided with two opposite supporting legs which abut with their lower supporting surfaces from above against a housing edge region which is adjacent to the cover pipe, so that during tightening of the locking screw which clamps the spindle collar and outwardly seals the spindle, simultaneously the cover is fixedly clamped with the housing.
Abstract: Flow rate of an electrically conductive medium flowing through an electrically insulating pipe section is measured as a function of electrical voltages induced in the medium by electromagnetic fields generated by an exciter coil energized by a pulsating direct current. To eliminate noise signal components the repetition rate of the pulsating direct current applied to the exciter coil is set as an even integer multiple of a frequency of alternating current interference voltage component and the detection of measuring signals occurs in adjustable pick-up intervals of equal length so that a group of four or an integer multiple of four is detected during each period pertaining to the frequency of the interference voltage. Then every second detected measuring voltage is reversed in polarity and thereafter the measuring voltages in each group are integrated whereby the noise components are neutralized and a sum of pure useful voltage components is obtained.
Abstract: An arrangement for testing a flow meter which issues a first train of pulses in response to the rotation of a rotatable member thereof includes a measuring cylinder-and-piston unit that has a cylinder, a piston slidably received in the cylinder and displacing a known comparison volume of a fluid out of the cylinder for delivery to the flow meter, and a piston rod which extends to the exterior of the cylinder. A photoelectric sensing arrangement is mounted on the piston rod for joint movement therewith along a stationary volume scale to scan distancing markings of such scale and issue a second train of pulses in response to the detection thereof. A first of such distancing markings is so situated that the sensing arrangement encounters the same only after the piston rod has covered an initial distance corresponding to a running-in distance of the piston.
Abstract: A shutoff wedge for a shutoff valve has a U-shaped sliding shoe of synthetic plastic material with good sliding properties, high wear resistance, and sufficient temperature strength, which is inserted in guiding grooves of the shutoff wedge which is sealingly enclosed by a rubber elastic jacket up to the sliding faces abutting against guiding strips of a shutoff valve housing. A method of anchoring of the synthetic plastic sliding shoe and a mold therefor are also provided.
Abstract: Disclosed is a testing device for at least one flow meter installed in a pipeline. The device includes a calibration container connected to the pipeline across a switch-over valve. A measuring piston is guided for reciprocating movement in the container between a starting and a terminal position. The measuring piston supports two signal releasing rings which are spaced apart from the other about a distance which when multiplied by the inner clearance of the calibration container determines a calibration volume of the measuring path of the piston. At least one signal generator is installed in the wall of the calibration container and cooperates in a contactless manner with the first and second signal releasing rings so as to produce start and stop pulses for one measuring cycle. The flow meter is connected to a pulse generator responsive to the flow rate and connected to an evaluation circuit which after completion of a measuring cycle compares the counted pulses with the calibration volume.
Abstract: A shutoff valve has a housing which is provided in the region of a lateral mounting opening with several holding projections having free ends which extend toward a cover and form an abutment for an edge of the cover, wherein the cover is sealingly mounted in the housing by tensioning pins which are driven between the abutment of the holding projections and a cover edge formed as a counter abutment.
Abstract: An electromagnetic pulse pick-up unit, particularly for use in flow meters having small nominal width, comprises a pair of magnets arranged at opposite locations and with opposite polarity in a measuring gear of the flow meter. Concentrically arranged with the axis of rotation of the gear, there is provided a sensing unit assembled of a central pick-up cylinder, a sensing coil arranged around the portion of the cylinder facing the magnet, and a plurality of Wiegand wires distributed side by side in axial direction on the cylindrical outer surface of the pick-up cylinder in close proximity to the sensing coil. A pole ring of magnetically conductive material short circuits the ends of the Wiegand wires remote from the magnets.
Abstract: A testing device for a flowmeter arranged in a pipe, has a bypass conduit connected with the pipe in which the flowmeter is arranged, a gauge container arranged in said bypass conduit and selectively connectable in series with the pipe, an element for selectively connecting said gauge container in series with the pipe, a measuring piston displaceable under the action of a fluid which flows into said gauge container over a measuring section having a beginning and an end, start and stop switches arranged at the beginning and at the end of the measuring section, respectively, and operative for starting and stopping of addition of electric impulses from the flowmeter during displacement of said measuring piston, a device for comparing the impulses being added with a gauge volume of the measuring section, and a measuring cylinder located in the interior of the gauge container, the measuring cylinder forming the measuring section and carrying the start and stop switches and the measuring piston, said gauge containe
Abstract: A safety valve has movable and immovable valve elements, and a friction unit arranged therebetween for damping vibrations, wherein the friction unit has a plurality of friction members movable radially relative to a valve axis, a pressing member arranged to move the friction members so that their friction surfaces are pressed against a friction countersurface of a movable valve element of the movable valve means and for abutment against a stationary abutment member at their side facing toward a valve closing member, and a pretensioned auxiliary spring acting upon the friction members at their side facing away from the valve closing member and in a valve closing direction, wherein the auxiliary spring has such force and such a smaller resistance that in the event of seizing of the friction members with the movable valve element, the auxiliary spring is compressed within a predetermined opening pressure which does not considerably exceed a response pressure over approximately a valve stroke.
Abstract: A flow meter, especially for measuring fluid flow passing through large-diameter conduits, in which a rod-shaped vortex generating body is built in a conduit section in a direction transverse to the fluid stream passing therethrough and in which Karman vortices detach themselves, the frequency of which, which is measured by feeler elements, corresponds to the speed of the fluid passing through the conduit. In order to assure that the aforementioned vortices detach themselves uniformly over the whole length of the vortex generating body even if the flow meter is built into a conduit of large diameter, the tube section is divided by at least one thin dividing wall into two vortex chambers. The vortex generating body is arranged normal to the aforementioned dividing wall, and the feeler elements for the sensing of the vortex frequency are arranged in one of the vortex chambers.
Abstract: A spring loaded safety valve includes a control device which admits the pressurized medium to a supplemental loading system which consists of a spring housing which serves as a cylinder for a spring retainer which serves as a supplemental loading piston that is arranged about two adjustable sleeves which are arranged around the valve stem and which control the response pressure and the supplemental loading of the valve spring.
Abstract: A spring-loaded safety valve has a housing with inlet and outlet, a valve member mobile between open and closed positions, a valve spring urging the valve member to the closed position and having a tendency to vibrate during the operation of the valve, and vibration-disturbing element for damping the vibrations of the valve spring during the operation of the valve. The vibration-disturbing element may be formed as a damping load or a damping spring which urges a valve spindle in direction of opening of the valve.
Abstract: A flow meter in which a bluff body of elongated cross-section extends substantially normal to the axis of a conduit through which a fluid, which may be a liquid or a gas, passes so that vortices or whirls alternatingly breaking away from the body are formed in the fluid to opposite sides of the body, and in which the frequency of the alternatingly breaking vortices is proportionate to the speed, respectively the volume per time unit, of the fluid passing through the conduit. This frequency is measured by at least one feeler arranged in a measuring conduit located outside the first-mentioned conduit and in which the measuring conduit communicates through bores with the interior of the first-mentioned conduit to opposite sides of the bluff body.
Abstract: A vane type meter includes an outer meter housing in which a cup-shaped impeller housing and cup-shaped counter housing superimposed on the impeller housing are mounted. The impeller housing is provided in the peripheral wall thereof with a plurality of rectangular, inwardly tapering inlet channels extending substantially tangential to the inner surface of the peripheral wall and with a plurality of upper outlet channels, of a number equal to that of the inlet channels and constructed substantially in the same manner as the latter. An impeller is arranged in the interior of the cup-shaped impeller housing for rotation about its axis and having a shaft extending into the counter housing.