DE2043779A1 - Device for determining the liquid level or stands before preferably in containers - Google Patents

Description

PATENT ADVOCATE Dr. ERNST STURM 8 Munich 23, September 3, 1970

31/341 »LEOPOIDSTR. 20 / IV ~~ *

(Concordiahaui) »1707

Dd:

Tel * grammanfdirifl: liarpalcnt Applicant; Navalco A / S

Skippergt. 3 »OSLO 1, Norway

Device for determining the liquid level, preferably in containers

The invention relates to a goal direction for determination of liquid levels by means of a sonia.

When measuring liquid levels in tanks, in particular in the bunker oil tanks of ships, the use of electric heating devices or * probes is because of the high risk of ignition of explosive gas mixtures undesirable. An electrical device should accordingly be secured against a rollover of an ignition inside the housing to the outside as well as against technical Failure which could cause ignition. These safeguards are complicated and corresponding expensive, and yet they hardly meet the rigorous safety requirements, especially on board ships.

The object of the invention is above all to create a device sur Heaeung dt? * »Tfht from

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ability set in containers in which these difficulties • are completely switched off. This object is achieved according to the invention solved in that a probe in the form of a tube biw. a hose connected to a pressure sensitive member is, which is in connection with an alarm device, wherein the pressure-sensitive member changes its state, when the free brew of the tube probe is blocked by the liquid level, and the alarm transmitter responds to the state change in the pressure-sensitive member * The closure of the tube probe due to the rising liquid level therefore creates in the tube a change in pressure to which the pressure sensitive member reacts reacts ήβΑ so that the alarm transmitter triggers.

The sending of the erflaauiigsga & äwön Maßvorriehtung thus closes from the outset every Hielko of an ignition by technical Failure because the probe or device after a pneumatic prinsip works.

In the following, an embodiment of the invention is better * hen with reference to the drawing.

Its compressed air source 1 feeds through valve 2, filter 3 and Beduzierventil 4 a Grenü-Lagen-Anseiger (fluidistor) 5 with air of the required pressure. The Fluidistor has XontrollksAält 6 and 12 on uad has the Aualtts «16, 1 ?. To the Control current signal 12 let tie. Bohr fciw »hose 12 'attached

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closed, at the lower end of a probe 12 for measurement of the liquid ice it s mirror B 14 Arranged in the container 15, In channel 6 there is a reducing valve to compensate for the StrOAUngswiderstand.es Provided in the channel 12. This The reducing valve opens into the open atmosphere. In a branch channel between the inlet channel of the Tluidistore and the Control channel 12 are arranged valves 7 »8, which are self-closing could be. When valves 7 and 9 are closed are, through a small hole 8 in the turn of the line atmospheric pressure between the two valves so that a leak in valves 7 and 9 will become one Pressure rise in the control channel 12 leads. The AuIaB 16 des Fluidistors empties into the free atmosphere, while the outlet 17 to an optical alarm transmitter 11 and an akuetiechen Alarm device 10 is connected, both of which are pneumatically operated.

The hose 12 'can be equipped with a scale to indicate the distance ron the probe 15 provided, emn. The probe 15 can Clay a piece of metal tubing larger in diameter than that Diameter of the optic tube formed a. You scale facilitated lowering the probe to the intended bsw. see below expected value. Because of the greater durometer, he would imitate the probe 13 clogging is prevented.

By working the Torriohtunf let as follows: When opening the valve "2 strBet X * ft dmrok das. Flttidistor 5 lad through Ameliise 16 " d "? 17 »Her ve * der Strömte« chosen path lit

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ORIGINAL INSPECTED

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by chance. When air flows through the outlet 17, the y-valves 7 and 9 are open. Sa's hole 8 is so small that the air flowing through valve 7 because of the relatively large flow rate flows into the hose 12 *. The primary flow in the Pluidistor is then determined by the overpressure in the Control flow 12 towards the outlet 16. The valves 7 and 9 then close - if necessary automatically -, and the loop 12 'with the probe 13 is used in the tank or container 15 Measurement of the liquid level 14 lowered. Venn the When the probe hits the liquid level, negative pressure is created in the hose 12 'and the primary flow through the Fluidistor 5 is directed to outlet 17 so that alarm transmitters 11 and 10 are actuated. As soon as an alarm or signal is given, you can read the scale on the tube, which gives the liquid level.

After reading this distance, the probe 13 is over the The liquid level is raised and the valves 7 and 9 are opened. The primary flow or the main amount of flow through the fluidistor 5 is now directed towards the outlet 16 again. The device is ready for the next measurement.

So the fluidistor hit one flow inlet and two Flow outlets 16, 17 · At U pressure in the hose line 12 due to hitting the liquid level the main amount of the current is passed through the Auelaß 17 so that the signal generator 11, 10 are actuated.

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Air also passes through the valves 7 and 9 through the hose 12 and the probe 13 are directed to blow out τοη blockages.

In the prescribed exemplary embodiment of the invention a fluidistor is used, but of course it can all kinds of pressure-sensitive means are used, which act on the closure of the free end of the probe 13 by the Fluid levels react. Any type of alarm device can also be used. Other signal generators can also are used in particular for display and registration of changes in the state of the pressure-sensitive limb or the state of health. Instead of a flexible hose line 12 'a rigid drill or a hose / pipe combination can be used if necessary.

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Claims (1)

ZH5T7T9 " 6th Claims M. / Device for determining the liquid level in Containers by means of a probe, characterized by that a probe in the form of a hose or pipe (12713) is connected to a pressure-sensitive member (5) which is connected to alarm or signal transmitters (10, 11) stands, the pressure-sensitive member (5) its state when the probe (13) hits the liquid level (14) changes and wherein the signal transmitter (11, 10) to the change of state in the pressure-sensitive member (5) speak to. 2. Device naoh AnspnaÄ 1, characterized in that the pressure sensitive member (5) of a bistable Iluidietor (Strömungewaadler) is formed by the two Has control channels (12, 6), to one of which (12) the probe discharge line (12 *) is connected and whose the other (6) leads to the outside via a reducing valve. J. Device naoh claim 2, characterized in that a branch line is provided between the entrance to the fluid port or the pressure sensitive member (5) and the probe line (12?), in which branch line at least a valve (7,8) switched on int. Τϋ "9ΓΒ" ΤΤΤΤΤΓΤ5 ~ .5 / / 3 - 7 - 4. The device according to claim 31, characterized in that « that two valves (7, 9) are provided in the branch line, between which a small opening in the line to establish a flow connection between dea Channel and the surrounding area is arranged. 5. Device according to one of claims 1 "to A-, characterized in that the sample (13) is formed by a metal drill bit with a larger diameter than that of the hose line (12 ¹ ). twt 11/1 QJO ORIGINAL INSPECTS » L e r s e i t e