US1756824A - Device for regulating flow of fluids - Google Patents

Description

A ril 29, 1930. 'F. HASEMANN 5 4 DEVICE FOR REGULATING FLOW 0F FLUIDS Filed Oct. 30, 1929 Patented Apr. 29, 1930 PATENT OFFICE rnmnmcn nnsmumr, or ESSEN-BUHR, GERMANY DEVICE FOR BEGULATING FLQ'W OF FLUIDS Application filed October 30', 1928 Serial No. 403,647.

This invention relates to a device for reg ulatmgthe flow of fluids through conduits under the influence of the pressure in the latter and of the kind wherein the regulationis effected by hydraulic and magnetic means controlled by a diaphragm. The ob'ect of the invention is to produce a device w ereby even the smallest variation in the pressure can be rectified without causing fluctuations, and the invention consists in arranging two contact springs, through which and through a diaphragm controlled pendulous contact, difierent magnets are energized, in a frame which carries the armatures of the magnets and which is connected to the spring controlled slide valve of an hydraulic piston whereby the regulating valve is operated, the contact springs being arranged in the frame so as to be moved by the latter under the influence of an energized magnet away from the current-supplying pendulous contact so as to cause an intermittent movement of the valve and of the regulatin piston. This arrangement will have the e ect, on a small variationof the pressure and also at the commencement and end of all variations, to bring about a very fine regulation of the gas supply and a quick but steady restoration of pressure to the normal.

The invention is illustrated in the accompanying drawing which represents a sectional view of the arrangement.

The flow of gas or other fluid through a conduit 1 is regulated by means of a throttle 2 the position of which is controlled by an hydraulic piston arranged in a cylinder 28. The ends of the latter communicate through pipes 26 and 27 with a valve chest 20 to which fluid under pressure is supplied through a ipe 25. A slide valve 21 is arran ed in t e chest so as to lead the liquid to either end of the cylinder 28 according as the valve is moved from a neutral position in one or the other direction. Normally the valve is maintained in the neutral position by two springs 22 and 23 which bear normally against opposite ends of the valve and against stops 24. a

The slide valve carries'a frame 19 within which two electromagnets 14 and 1-7 are arranged on a stationary support. The armatures 15 and 18 of the magnets form part of the frame and move the latter and the slide valve in opposite directions, in opposition to the springs 22 and 23, on an energiz'ation of the magnets. Current is supplied to the magnets through contact springs 13 and 16, which are carried by the frame 19, and through a contact 11 which is arranged between the two springs and carried by a pendulum 10. The latter is controlled by a diaphragm 4 which is arranged in a casing 5 and which is exposed through a pipe 3 to the gas ressure in the conduit 1. A double armed, orizontal lever 7 which is connected to the pendulum so as to turn about the same pivot, carries at one end weightsS whereby the position of the contact 11 between the springs 13 and 16 is regulated, equal gaps being maintained between the contact 11 and the springs so long as the pressure in the conduit 1 and inthe pipe 3 remains normal. The opposite arm of the lever 7 is situated between springs 9 which form abutments for the same and which oppose the deflection of the contact 11 beyond a given angle. Preferably several springs are arranged one behind another so as to come successively into operation and form a resistance which increases both in gradual proportion to deflection and stepwise. A-rigid abutment 12 is arranged between the contact springs 13 and 16 so as to limit their movements in the direction of the abutment.

The contact springs energize difierent magnets when touching the contact 11 and are arranged in the frame 19 so as to be moved by the latter and by the magnets away from said contact. Thus, in the case of an increase in the pressure, the contact 11 will be moved by the diaphragm to the left into contact with the sprmg 13. The latter then energizes the magnet 14 the armature of which causes the frame and the slide valve to move also to the left so as to supply liquid to the left side of the piston and produce a closing movement of the valve 2. Unless the increase in the gas pressure should happen to be considerable and sudden, the movement of the frameto the left causes the spring 13 to separate from the contact 11 and thus to break the circuit whereupon the frame and the valve will be moved back by the spring 22 until contact is again made between the spring 13 and the contact 11. In this manner an intermittent forward 'inotion of the piston will take place until the res'sure has been restored to the normal.

he movements will get smaller and smaller in proportion as the pressure is reduced, and the operation of the device will cease on normal pressure being reached. Should the pressure continue to increase in spite of the intermittent operation of the valve, the spring 13. will finally be unable to break the circuit, and the regniating will then move steadily forward until the throttle has been ciently closed. A reduction. the pressure below the normal wili cause the contact 11 to energize the magnet 17 and to move the frame and slide to the right so as to efi'ect an opening movement of the throttie. The springs 9 prevent an excessive deflection of the contact 11.

While one of the contact springs co-operates with the contact 11in the above-described manner, the other spring is prevented by the abutment 12 from interfering with the operation.

its

' zation of one o the magnets.

Since the diaphragm has noother function than that of deflecting the pendulously sustact, and a plurality of springs arranged one behind another at opposite sides of said arm so as to form abutments therefor and sepa- 1 rated so as to roduce a step-wise increase of abutment.

FRIEDRICH HASEMANN,

pended electric contact, it will move without material impedance and render the regulatin% device extremely sensitive claim:

1. A device of the character described for regulating flow of fluids, comprising a throttle arranged in the fluid conduit, a hydraulic piston controlling said throttle, a slide valve adapted to admit liquid to either side of the piston according to its movementin one or the other direction from a neutral position, a

pair of springs tending to maintain the valve I in its neutral position, a frame carried by theshde valve so as to follow its movements, a

pair of electromagnets sup orted in a stationary position within said Frame, armatures fer said magnets connected to the frame and adapted to move it under the influence of the magnets in opposite directions, a pair of contact s rings carried by said frame and arran e in the magnet circuits one in each, a pen ulouslysupported contact arranged between said contact springs and adapted to supplycurrent to the respective magnets on contact with said contact springs, and a diaphragm controllin the position of said pendulously'supporte contact under the influ- 1 ence of the pressure in the fluid conduit, the

contact springs being arranged in the frame so as to be moved bythe latter away from the pendulously su ported contact on an energi- 2. The structure claimed in claim 1 in combination with a lever arm adapted to move togather with the pendulously supported con-

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