DE1807714U - CONTACT MANOMETER. - Google Patents

Description

.080 45ε * -if. 2.60

PATENT ADVOCATE GDPL. ING. AMTHOR FRANKFURT AM MAIN

FEAWKFUET A. M. 2.2. 196 O

6751 1 / mö /

phone 552023 eyssenecksthasse 30

POSTCARD SPACn 11088 ClIVi

Alexander Wiegand, Klingenberg (Main)

Contact pressure gauge ■■

Purely specific control tasks by switching on or off ₉ to trigger optical and acoustic signal systems, contact _{pressure gauges with open contacts are known 9} that are either made with slow action or with magnetic snap action «

The load capacity of the contacts is very limited ι it is 10 YA for slow action and 30 YA for magnetic snap action ₅ the maximum load capacity of the contacts is 1 Amp »

-i

The applicability of contact pressure gauges is of a vibration-free one Attachment dependent and especially contact pressure gauges with IContact devices in slow action require a completely drowning-free Arrangement"

Due to the low load, an intermediate circuit required minimum of relays A particularly adverse circumstance in these gauges is _but-9 therein that their use verbietst there j where a risk of explosion due to sparking and aggressive vapors oxidation of the contact parts manufacturer

can call out no

The present invention relates to a design of these types of pressure gauges, by which in a simple way the mentioned disadvantages switched off and the mode of operation of the pressure gauges is improved »This training consists essentially in j that there, s manometer housing as a liquid lockable Container designed and with a non-conductive with non-aqueous liquid such as insulating oils or Ohlorprommetan or » its technical mixtures with other halogenated hydrocarbons, in particular difluorochloromethane is filled ο

The chlorine- and / or fluorine-containing compounds in the hydrocarbon area, preferably the chlorpromietan-containing products known under the trade name OB, have the advantage of being colorless, unlimited shelf life and much less toxicity than carbon tetrachloride , while oils partly tend to change their viscosity due to polymerization, among other things more or less yellowish to dark to discolor _s so as to select a replacement after a certain ffebrauchszeit ver · = langenο

To ensure a lowering of the flushing level down to the According to a further embodiment of the invention according to the nianometer, a contact float is provided in the area of the contacts, which when falling below a predeterminable buoyancy value einan The bridging contact opens and with it the power supply and thus the possibility of dangerous sparks or switching arcs excludes »

The liquid filling not only offers the gate part of a reduction of the spark formation during the switching process and extinguishing of arcs & i- ^em '^ inflammable gases or vapors in the measuring space could come into contact, but also prevents. Corrosion of the contacts, contact carriers and other parts of the equipment at risk of corrosion, enables the pressure gauge to be attached to vibrating leakage points, even with contact pressure gauges that are sensitive to vibration and have a shift circuit, and it also has an advantageous effect by damping the display in the event of rapidly changing pressure differences 8, USo

Insulating oils have a special dampening effect a.us, wear also contributes to the lubrication of the movement. Have halogenated hydrocarbons or highly extinguishing mixtures containing them on the other hand the favorable property;, above the liquid level to form an extinguishing gas layer, so that a certain Safety even in the event of an unexpected drop in the liquid level remains "

The drawing shows, as an exemplary embodiment and for explanation, a manometer with open contacts and liquid filling. The housing 1 is sealed liquid- and gas-tight by a cover 2, 3 is the connection pin, 4 is a cable socket, 5 is the pressure gauge pointer, β and 7 are the setting pointers, 8 and 9 are the contact pin carriers _o The safety line 11 with two Fixed contacts 12 and 13 is bridged by the bridge piece 14 with two contacts that lie against the fixed contacts of the safety line, the bridge piece is located

see at the lower part of the shaft "15 of a piston-shaped Float 16 in a cylinder 17ο 18 is a stop bushing, through which the pin 19 for setting the contacts of the setting pointer to the desired limit values by means of the wing arm can be adjusted "21 is a filling screw for the ! Liquid, 22 an emptying screw with a corresponding Seal *, The operation of a contact pressure gauge, which is called an it is assumed that the float works as a safeguard against a harmful drop in the liquid level, can be seen from the illustration

The volume of the float and the arrangement of its cylinder are dimensioned so that the contacts are made by the buoyancy force Keep firmly attracted to the stationary contacts, with a predetermined drop in the liquid level, the liquid level drops Float off and opens the contacts,

The cylinder is appropriately perforated, it can also be replaced by a simple wire guide.

Claims (2)

'1,080 ScMuta claims to contact majiometer with open contacts, as indicated by j that the manometer housing or that containing the contacts Housing part, liquid-tight and expediently gas-tight closable, with a non-aqueous, non-conductive Liquid filling is equipped, within which contact-forming ropes are held » 2. Contact pressure gauge with open contacts, characterized in that that 8.1s filling liquid insulating oils or halogenated hydrocarbons, such as chlorobromomethane or preferably several Low molecular weight aliphatic halogen compounds containing halogen atoms are provided. ο Contact manometer with open contacts according to Claims 1 and 2, characterized in that when the liquid level drops, float-controlled means, such as bridge contacts, are provided which interrupt the Hets "