DE1880137U - MANOMETER WITH SWITCH DEVICE. - Google Patents

Description

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VDO XÄ.CHOME0KBR WEREE. WRAMFURT / M. W 1Y ADOLF SCHINDLING GMBH ⁺ GRÄPSTRASSE 1OJ ' Pressure gauge with switchgear .

The invention relates to pressure gauges with setpoint and actual value pointers, on which means for controlling a switching device are arranged, which become effective as soon as the actual value pointer has a assumes a certain position relative to the setpoint pointer. Such pressure gauges are known as contact pressure gauges with slow action, Magnetic spring circuit, mercury ring tube circuit as well * Known electronic circuit with inductive pick-up «These pressure gauges all have the disadvantage that, apart from an inductive pick-up for switching control, there are also moving parts must be used «This brings with it increased friction and, in addition to influencing the display, can also lead to lead to premature failure of the contact pressure gauge

It is the object of the invention to avoid this disadvantage without the high complexity of an electronic circuit. The invention consists in that the control means for the switching device of the pressure gauge operated with compressed air and control the switching device with the interposition of a pressure-sensitive element. For this purpose, one with a compressed air source is used as a control means on the setpoint pointer connected jet nozzle as well as at a certain distance in the jet direction one with the pressure-sensitive Link connected collecting nozzle arranged and on the actual value pointer between jet »and collecting nozzle when reaching certain pointer positions α in the air jet immersed deflector provided.

The use of compressed air as auxiliary energy means that there are no additional moving parts. The one flowing out of the jet nozzle Air is so weak in its power that it has the actual value pointer not affected in its position. The pressure gauges according to the invention are completely vibration-free and independent of position. They also have the advantage of high switching capacity (e.g. 5 amp. when controlling an electrical contact device) and

can also be used directly to control a pneumatic or hydraulic switching device can be used »

The invention is explained below with reference to the drawing of Embodiments explained in more detail. Xn more schematic Representation »own

Fig. 1 a manometer with an electrical contact * device and

S ¹ Ig »2 a manometer is a pneumatic switching device ·

Sound of a constant compressed air source 1 of 1 _S 4 ± 0 _s 1 atm (common in pneumatic control technology) is applied to the device »The compressed air is reduced via a throttle 2 so that the jet nozzle 3 air with a pressure of approx. 150 - 200 mm flows out. Exactly opposite the jet nozzle 3, the collecting nozzle 4 is arranged on the setpoint pointer 10; both nozzles are firmly connected to the pointer 10. The collecting nozzle 4 is connected via a line to a pressure-sensitive element, in the example a bellows 6. If the collecting nozzle can take up the compressed air from the jet nozzle unhindered, there is a certain pressure in the bellows 6. This pressure times the area of the bellows gives a certain amount of work, which in turn acts on the microswitch 7 and actuates it. The connection lines of the microswitch are led to an ICable connection socket 8.

If the air jet from the jet nozzle is now deflected by the AbXeU plate 5 attached to the actual value pointer 9, the The collecting nozzle runs out of air and the pressure in the bellows is down zero. The spring inside the lükrosch & lter can compress the bellows; at the same time the microswitch switches around.

The setpoint pointer 10 with the blasting and collecting nozzle can be adjusted over the entire scale of the measuring device, so that £

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over the whole range J ed ca * Arfoeitepiifikt is adjustable <? The force of the air jet i; ι; ®o little asM does not affect the display of the MaBometera iri :: ^ So Mi) ik ^ ial-fcyst ^ ea © depends on the diameter of the jet and Äiiffgm & cliiae and this can be chosen in this way be? that see sus & nmen with the switching hysteresis of the electrical JOki & acb <results in a total switching hyeteresis iron below 1%.

Ia example according to .'Figo2 Is cLca? Ifilirose-tolter clirck © in sogcizianiites Pilotwntil 11 er & etsto der.: Ifegriff & es working point takes place in gJsickax »Weiscs disr-öh the jet collecting nozzle in cooperation with the Itieltlilecfc 5 bellows 6 switches the pilotvei.feil * Γ midge Sißii chalt on 0 ® & ®χ '< _% >% & ti i? E, Λι ^^ & Μ ^> Μ ^ ₉ if the input of the pilot valve 11 is connected to the compressed air source 1. Me B & weguxig <iei>'Fed& rbalges € is used to control the pressure λ of the pilot valve aue ^ enntBl, which either connects the compressed air £;' bspes * ti5 -amd the --- ierSteauegsng 15 with the atmosphere 12 ·, fi'o & a £ der ^: Jeräta exit equal to Hull is _9i or at de :? 3 © ififjj2g des i'iderl] - nlgee nsicÄ the other side die Drucki ^ f'ö ίώ1; ά.βκ X. «sg;" \ ug «iss pilot valve connects * to the increase <Uj?! -nftlois ^ ang ä @ s Serltes a hanc i * l3Übli'3 ^: © £: Toliiiieavci-.i -istiljrfcerrelais 1: 1 connected wes ^ lesij 11Ί »äieeer .iasfi! lni3 £ s you are able» to control a pneumatic table in each fejfdxviulietihe device through € <m. SolltrartEcdgt ::. ¹ .

Claims (4)

RA. 560 990 * 8/31/63 sickness claims. 1. / Manometer with setpoint and actual value pointer, on which means for controlling a Sehaltvorrichtung are arranged, which take effect as soon as the actual value pointer assumes a certain position to the setpoint pointer, characterized in that the means for controlling the switching device from compressed air flowing out nozzles and the Exiting compressed air receiving nozzles exist and the switching device is connected to a pressure-sensitive member acted upon by the compressed air received by a collecting nozzle. 2. / Manometer according to claim 1, characterized in that as control means for the switching device on the setpoint pointer (10) with a compressed air source (1) connected jet nozzle (3) and at a certain distance in the jet direction one with the pressure-sensitive member (6) connected collecting nozzle (4-) are arranged and a deflector plate (5) is provided on the actual value pointer (9) between the jet and collecting nozzle when certain pointer positions are reached in the air jet. 3. / Manometer according to claims 1 and 2, characterized in that the pressure-sensitive member (6) consists of an I-bellows, a capsule spring or a membrane. 4. / Manometer according to claims 1-3 » characterized in that an electrical, pneumatic or hydraulic switching device is used as the switching device. Note: This document f Schuteanspr,) submitted to die nilete *; it differs from the Worf Fasxmg Uw uiisrlich submitted documents. The real definition of the deviation is not checked. The originally submitted documents are in aen Arr.tsakfen. They can be viewed free of charge at any time without a * legal interest. On request, photocopying * «film negatives will also be delivered at the usual prices. German Patent Office, utility model website.