DE1675316C

DE1675316C - Device for leak detection in storage tanks

Info

Publication number: DE1675316C
Authority: DE
Inventors: Hans-H. 4630 Bochum; Schwenk Wilhelm Dr.rer.nat 4100 Duisburg Riemann
Original assignee: Hansen, Neuerburg & Co GmbH, 4300 Essen
Publication date: 1972-11-16

Description

nur eine Tropfenansammlung des Wassers ist zwar einer zunächst sehr kleinen ^Sto^^J⁵H¹' ^₄J?only a collection of droplets in the water is an initially very small ^substance. ^^ J ⁵ H ¹ '^ ₄ J?

über das Netz3 leitend mit der Ader4 verbunden, nicht unterhalb des Erregerstromes des «ame ucguConductively connected to wire 4 via Netz3, not below the excitation current of the «ame ucgu

aber leitend mit der Ader 6, weil die Kunststoffaus- Immerhin kann durch eine kleine Pore der Kunstbut conductive with core 6, because the plastic can after all, through a small pore of art

kl_Sidung2isouert.DasWasserdurchdringtdasNetz3, Stoffauskleidung aggressives Wasser an den lan*kl _S idung2isouert. The water penetrates the net3, fabric lining aggressive water to the lan *

berührt also die Kunststoffauskleidung. Wird die ₅ mantel gelangen. Bei der beschriebenen^Ordnungso touches the plastic lining. Will get the ₅ coat. With the described ^ order

Kunststoffauskleidung an einer Stelle X porös, so und Polung wird aber durch «*--« ™<* kathoPlastic lining is porous at one point X , so and polarity is indicated by «* -« ™ <* katho

Kunststoffauskleidung an einer Stelle X porös, so und PgPlastic lining at one point X porous, see above and Pg

durchdringt das Wasser 10 diese und kommt mit dem dischen Schutzes dk ffthe water 10 penetrates this and comes with the dischen protection dk ff

Tankmantel 1 in Berührung. Durch den hierdurch sogar ganz aufgehoben. DieTank jacket 1 in contact. By this even completely repealed. the

khlß ih d Elkd k id so besser ^khlß ih d Elkd k id so better ^

Tankmantel 1 in Berührung. Durch den hierdurch sogar ganz g ^_ε Tank jacket 1 in contact. Because of this even completely g ^ _ε

entstehenden Kontaktschluß zwischen den Elektroden, kung wird um so besser ^/"ΐ^ιΞΞ St Da-„ämlich dem Netz 3 und dem Tankmantel 1, spricht „ an ^e. Tankwand gelangende WMgu sdphen das Relais 7 an und schaltet über den Kontakt la die mii wird auch bei längerer ^"SU
Alarmvorrichtung 8 ein. Schon der erste ausreichend Wassers am Tankmantel .^y^'J
oroße Kontaktinfpuls bewirkt mittels des Haltekon- bei der Entstehung emer leckageresulting contact circuit between the electrodes, kung is the better ^ / "ΐ ^ ιΞΞ St DA" ämlich the network 3 and the tank wall 1, "addresses ^ e. tank wall reaching WMgu sdphen the relay 7 and turns on the contact la the mii will also be used for longer ^ "SU
Alarm device 8 on. The first enough water on the tank jacket. ^ Y ^ 'J
The osseous contact pulse causes the emergence of leakage by means of the holding cone

^{die Tankwaud 8elangen}' ^t^£ ^{the Tankwaud 8elangen} ' ^ t ^ £

SSSSbS Anordnung ist leicht herstellbar, bilden sich an jener Stelle aupSSSSbS arrangement is easy to produce, form aup at that point

denn das Netz 3 wird erst nach dem fertigen Einbau Abhebungen des Kunststoffes die denbecause the network 3 is only after the finished installation, the lift-offs of the plastic

der Tankanlafce ausgelegt oder bei einem nachträg- ao wesentlich erleichtern, so daß dieser ^the Tankanlafce laid out or with a subsequent ao make it easier so that this ^

üch ausgekleideten Tank bei der nachträglichen An- rasch ansteigt, bis er schließlich die JThe lined tank rises rapidly during the subsequent approach until it finally reaches the J

bringuni der Leckanzeigeeinrichtung. Bei Begehung schwelle des Relais 7 enacht und «bringuni the leak indicator. When entering the threshold of relay 7 eight and «

des Tante ist das Netz, weil sichtbarf leicht überprüf- Nach der Entleerung ^J the aunt's network is visible because it is easily inspected after emptying ^ J

bar. Ein elektrisches Überprüfverfahren ist die Kon- Alarmgabe laßt sich dasbar. An electrical verification procedure is the Kon-Alarmgabe let that

«,s-EöSür·^{Impedanz zwischen dem as} ^äS^T «, S-EöSür · ^{Impedance between the as} ^ äS ^ T

tCSSer Kunststoffauskleidung an ftoffauskleidung orten. Nach ^₌ Locate tCSSer plastic lining on fabric lining. After ^ ₌

der Stelle JT entsteht regelmäßig ganz allmählich schadhaften Stelle laßt sich das_n ^N^™?tendiSthe place JT arises regularly, very gradually, the damaged place _{lets the n} ^N ^ ™? tendiS

infolge der Vergrößerung winziger Poren oder Haar- um den Tank wieder in den Betriebszustand zu risse. Mit diesem Vorgang setzt der Stromzufluß mit 30 versetzen.as a result of the enlargement of tiny pores or hairs around the tank to return to working condition cracks. With this process, the current supply continues with offset 30.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

ι 2 disadvantage that in the presence of moisture claims: an alarm would be given from the start. P The invention aims to provide a tank of the above

1. To create a device for leak detection with a designated type in which, although only an oil- and water-impermeable plastic lining 5 internal leakage is indicated, the storage tank provided with the mentioned manure, in particular, does not have heating disadvantages; ie also narrowly limited oil tanks with an electrically conductive layer pitting pits should be displayed, and the one on the plastic lining, with the electrically tank-side part of the leak indicator device, should be easily conductive layer produced with one clamp and just as easy to check.
This object is achieved according to the invention with the other terminal of this current by connecting the electrically conductive layer in a circle, thereby identifying the area of the tank bottom on the inside of the oil and ζ calibrating η et that the electrically conductive layer of waterproof plastic lining! * is a mesh of corrosion-resistant metal on the inside in the area of the tank bottom. 15 According to further refinements of the fire, the clothing (2) lying on the net (3) is made of corrosion-resistant metal, like a carpet. can be rolled up and at the positive pole of a direct current source

2. Device according to claim 1, characterized connected, while the tank jacket identifies on the Mmuk, that the network (3) is connected in the manner of a pole.

The carpet can be rolled out and rolled up easily. ao By the device according to the invention

3. Apparatus according to claim 1, characterized in that the electrical conductivity only through indicates that the network (3) is made at the positive terminal and a leak in the plastic lining the tank jacket (1) is displayed on the negative pole of a equal-.

power source (5) is connected. By connecting the network to the positive pole

35 and the tank jacket to the negative pole becomes a

cathodic protection of the tank wall created; on the other hand, there is a rapid increase in the

The invention relates to a device for the leaky point of the plastic lining, so that an indication with an oil- and water-impermeable lining can be recognized at an early stage.
Storage tanks provided with plastic lining, in particular at the same time, pitting corrosion of special heating oil tanks is prevented with an electrically conductive tank jacket at this point.
Layer on the plastic lining, whereby the In the drawing, the invention is based on an

electrically conductive layer with the one terminal management example explained. It shows in the cross section of a circuit and the metallic tank exterior - the lined bottom of an underground heating oil jacket with the other terminal of this circuit 35 tanks with leak detection device,
connected is. On the steel wall 1 of the sole of a heating oil

With such - for example from »Techn. tanks is a plastic lining 2 for example Monitoring, 8, 1967, No. 6, June «- known from polyester or epoxy resin applied, sprayed on Tank is the plastic lining on which the conductive or glued. Lies on the plastic lining layer is on top, hydrophilic. The tank jacket before 40 loosely a mesh 3, the width of which is about half the tank internal corrosion protective plastic lining is equivalent to diameter. The network is a wire the conductive layer arranged so that the conductive layer is woven or a metallized or graphitized intermediate the two plastic linings are made of solid fabric, for example glass fiber fabric. The network is come is embedded. The above-mentioned current circuit for a full-surface support on the bottom of the tank becomes pliable when water penetrates as a result of outside 45. On the other hand, the network is solid corrosion active. For viewing a permeable enough to be committed occasionally undamaged ability of the plastic located inside the tank. The accessibility of the network protects clothing addresses a second circuit, whose tank inspections the plastic, especially the The other electrode is in the water sump of the tank filling, which is mechanically sensitive gelcoat of polyester resins. This arrangement serves the purpose of the display 50 layer. When a network consists of wire material an internal leak only provided that this is made of corrosion-resistant steel or, for example, the aqueous phase is present as a sump, in the way of tinned copper wire. The tin layer the control electrode is immersed. Often, however, prevents the migration of copper traces Also already drops of pitting, the oil and thus the aging of the oil as a result of Anohne that this is made of copper by the known device.

be known, namely if these droplets with the wire 4 is the network 3 at the positive pole

lungs do not touch the control electrode. A white direct current source 5 low voltage (weaker disadvantage is that the conductive layer or the power system) is connected. With the core 6 , the plastic lining must be impermeable to vapor diffusion. Tank jacket 1 attached to the negative pole of the power source- This is difficult to achieve and not too closed at all. The coil of a relay 7 is in wire 4, check. whose normally open contact la is in the current path of an

Finally, from the USA. Patent 336 773 stischen and optical alarm device 8 is located. The one water overflow protection is known where contact Ib is holding contact. The core 4 runs in the interior of the tank with a hydrophilic layer between two conductors up to the dome neck and penetrates the orderly, which isolates the dome neck or the dome cover when an overflowed dome neck or the dome cover occurs. The wire 6 water becomes the conductor and thus a contact is connected to the dome cover,
triggers. In the example up to the boundary layer 9

The use of a hydrophilic layer has the rich aqueous phase 10 of the heating oil or else