DE1727055U - MAGNETIC VALVE. - Google Patents

Description

f? A.102814 * 19.2.5]

Applicant Stuttgart, 1-8ο 2 ₀ 1957

Company 'SM 250 FZ!) !,

Christian Bürkert

Construction of electrical appliances

IngelfIngen / Württ. BGM 1 727 055

(Aas B 21756 / 47g Gm)

Representative
Patent attorney
Dipl "-Ing. Max Bunke
Stuttgart - S
Danneckerstraße 7

magnetic valve

There are basically two different types of solenoid valves Versions o In one version, the magnet lifts the locking cone or one with a soft seal Locking plate on? in the other, however, in particular in If higher operating pressures are used, the solenoid valve opens and closes an auxiliary control bore through which the medium normally flows acts on a piston whose area is larger than the Sitagu section «, the medium acts on the piston and moves it valve cone connected to it opening or depending on the design closing

The latter embodiment must always be used when For reasons of space or price, it is not possible to make the magnet so powerful that it can resist the pressure of the Medium can lift the valve cone directly *

Pilot-operated or disadvantage of this so-called "servo motor operated valves consists above all in a large design and manufacturing moderately difficult effort," The gap between piston and cylinder must in fact be much smaller than the cross "section of the auxiliary control bore _e latter can in view of the limited traction the magnets and the

kend pressure of the medium cannot be made arbitrarily large.

Especially with valves of large diameter, the gap must be because of the large piston diameter knife and the associated large

I,

Gap length can be kept very tight.

If the medium is not clean, or if there are rust particles in the pipeline or the like sol @ n, there is a risk that this Particles from the medium into the gap between the piston and cylinder be rinsed and the mechanism failed The different thermal expansion between the media can already internal pistons and the cylinder exposed to the outside air lead to clamps * It has also already been observed that ins = - especially when the valves are only operated occasionally, the »wipe the piston and cylinder corrosion occurring the proper function impaired ο

Bs has also been suggested instead of pistons and valves Arrange membrane systems that directly or indirectly open the Cause valve cone. Valve © of this design require additional Diaphragm body, special connecting lines on the valve and are Difficult to dismantle in the event of malfunctions or repairs

All pilot-operated constructions together adheres to the very empfindliehe disadvantage that they be accepted% and by Bauweis © either gum or open sum closing one alternate pressurizing medium necessary "have also must eriuet while keeping open a Druek ^ ₀ For media which strong X ^ e & are subject to fluctuations, the valve closes · against the control pulse, 'when the pressure falls below a minimum value,

The invention relates to eisr solenoid valve with an influenceable by an auxiliary control membrane, and consists essentially in that the opening in a known manner, the driving force for and closing the valve supplying diaphragm with Hilfssteu @ rkegel coupled ± st _s such that - it can also be moved by the auxiliary cone when the valve is not under pressure or at very low pressures when the magnet is excited " By

a specially designed channel system and an advantageous am circumference of the reinforced! rope of the membrane arranged sieve can the valve can be made insensitive to contamination within very wide limits «,

According to a preferred design according to the proposal of the invention the magnetically operated linkage should first control the auxiliary control and then over this the membrane in the opening or closing Moving meaning ο According to the invention, the membrane can be designed in this way be that in their randaone they have a loaf-shaped Has a bulge of a diameter almost half the diameter of the reinforced central part, with on the inside of the lid above the membrane is provided with a curvature that accommodates the unrolled membrane

Further features of the invention emerge from the following Description of an embodiment in connection with the drawing and the claims «

The housing 1, designed as a sleeve body, is provided with a cover 2. The bead of the membrane 3 seals the housing to the outside and against the deekel abc Screws 4 press the cover onto the housing ₀ The membrane 3 is significantly reinforced at its lower and central part, so that it can withstand the pressure of the medium on the valve seat: 5 · If necessary, the membrane can be reinforced by a metal disc the size of the valve seat that is located in it, or by a metal disc placed under it. The reinforced part of the membrane is provided on its circumference with a groove 6, which on the one hand is surrounded by a "?" the sieve? is sealed against the medium flowing around the membrane; On the other hand, the hat 6 is connected to the space above the membrane via a small hole 8 "The cover 2 has a circumferential groove 9 near its circumference, against which the bulge 10 of the membrane 3 rests." The membrane is in its center with a Bore 11 perforated, the cross-section of which is larger than that of the channel 8 '. The auxiliary control cone 12 is suitable, on the one hand, to close the bore 11 and, on the other hand, to lift the membrane 3 over the cap 13 attached to it. A spring 14 presses the membrane on the site 5 «Bs can be advantageous, the spring 14 instead

to have a direct effect on the membrane using a suitable intermediate piece on the Hilfsstöuerkegel * Sin above closed pipe i 5 gnetischem from unm & material is in the lid 2 flameproof ^{befestigti-1,} it is the longitudinally movable magnetic core 16, which via a rod 17 to Bilfssteuerkegel 12 holds, the coil 18 has a current flowing through it and, in a known manner, generates the axially acting tensile force · Bin housing 19 "with a cover 20 encloses the entire magnet system.

The valve works as follows: in, for example, de-energized State, the auxiliary oil control cone 12 closes the auxiliary control bore 11 by means of its own weight of the magnetic core 16. The medium acts, as long as there is pressure, via the sieve 7 and the bore 8 on the upper surface of the membrane 3 and press it open the valve seat »'If there is no pre-pressure, the spring H ensures for the membrane to rest on the valve seats 5. '' "

Upon energization ame "solenoid coil 18 © moving I of core 16 upward, whereby the auxiliary control bore 11 is connected to the Haum above the diaphragm" Bas medium in this space flows through the Hilfer steues'holmmg 11 faster than it zufließe through the bore 8 can "35a the membrane © in its effective for the buoyancy exterior is diameter greater than the Ventilsits, the Druchunterschied first © raises aa ₀ Bi © ae upward movement is characterized by" supports that the? auxiliary control cone 12 abuts the cap 13 and via the difss © Si © membrane © Mit-nach ol'sen takes "If there is no pressurized medium ia &<$ n pipe system, the auxiliary control cone ©! alone lifts the M © mlbraK. @ _o

In the first moment when the _{sieve T 5} is opened, especially when it is dirty, the membrane © & ®r full under certain circumstances large ¥ ®5? D2? M @ k _s so that the Memte-sia © strives to flow upwards ausauweiöli © 2s.o Ite @ Wb'lbnmg 10 lays see in this case against the appropriately trained © ^ 'olhw & g 9 des Obert @ il © s _? whereby the © Meaiteaa © Gegesi information or! © ißesi is scMitst «

If ai © Reel © _s de-energized so OCE core IS falls, "the auxiliary control cone 12 ¥ © i? Selili @ ßt the auxiliary control bore 11 _s the pressure of the medium" bsw _a di @ ifeaft & ®τ led a ©? 14 \ 7acts with the membrane ';

thereby closing the valve

With the appropriate design of the magnet system , it is also possible to design the valve in such a way that it shut off the passage of the medium when it is energized

Claims (1)

Bohutzaas-p-rüohe.-: ,,,. *. - 'r ■■' ■■■ '' ^ - "^;" ■ ". '■ - ■' - 1, ») Solenoid valve with a diaphragm which can be influenced by an auxiliary control, characterized in that the diaphragm, on the one hand, provides the driving force for opening or closing the valve
supplies and, on the other hand, the flow rate of the
Medium shut off » 2,) solenoid valve according to claim 1, characterized in that the magnetically operated linkage first affects the auxiliary control flows and then the membrane in opening or closing Moves your senses 3 «) solenoid valve according to claim 1-2, characterized in that the membrane is provided with a sieve that the flowing
Medium is exposed and the auxiliary control flow behind the
Strainer is branched off, 4 ") solenoid valve according to claims 1-3, characterized in that the rub is placed in a ring-shaped groove of the merabran body " 5 ») solenoid valve according to claim 1, characterized in that the membrane is shaped so that it on the one hand the large
Withstands opening pressure and, on the other hand, can be moved in the axial direction with relatively small forces » 6 ») Solenoid valve according to claim 1, characterized in that the membrane has a semicircular bulge in its outer hand
has, which at possibly large opening pressures against a correspondingly shaped upper part of the valve lays _v Solenoid valve according to claim 1 - 6, characterized in that the diaphragm body is provided near its periphery with an upper and lower diehtting bead _r which is used for centering during assembly and at the same time for sealing the upper and lower parts »