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DE579184C - Moisture indicator for insulation - Google Patents

Moisture indicator for insulation

Info

Publication number
DE579184C
DE579184C DEB149410D DEB0149410D DE579184C DE 579184 C DE579184 C DE 579184C DE B149410 D DEB149410 D DE B149410D DE B0149410 D DEB0149410 D DE B0149410D DE 579184 C DE579184 C DE 579184C
Authority
DE
Germany
Prior art keywords
moisture
insulation
display device
mutual
moisture indicator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEB149410D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BERTHOLD JENEWEIN DR ING
ERNST BORSCHKE DIPL ING
Original Assignee
BERTHOLD JENEWEIN DR ING
ERNST BORSCHKE DIPL ING
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BERTHOLD JENEWEIN DR ING, ERNST BORSCHKE DIPL ING filed Critical BERTHOLD JENEWEIN DR ING
Priority to DEB149410D priority Critical patent/DE579184C/en
Application granted granted Critical
Publication of DE579184C publication Critical patent/DE579184C/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/181—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for cables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/30—Inspecting, measuring or testing

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Examining Or Testing Airtightness (AREA)

Description

Alle Wärmeschutzmittel müssen zwecks guter Schutzwirkung möglichst trocken sein. Feuchtigkeit erhöht die Wärmeverluste bedeutend, gleichgültig ob diese Feuchtigkeit von außen (Niederschläge, Grundwasser u. dgl.) in die Isolierung eindringt oder ob sie die Folge undichter Rohrleitungen ist. Namentlich bei den ausgedehnten Rohrnetzen von Fernheizwerken ist ein dauernd guter Wärmeschutz unerläßlich.All heat protection agents must be as dry as possible to ensure that they are effective. Moisture increases heat losses significantly, regardless of whether this moisture is present penetrates the insulation from outside (precipitation, groundwater, etc.) or whether it is the result of leaky pipelines. Especially with the extensive pipe networks Long-term thermal insulation is essential for district heating plants.

Es ist bekannt, die Verringerung des elektrischen Widerstandes von Stoffen durch Wasseraufnahme dazu zu benutzen, um in Gebäuden auftretende Feuchtigkeit zu melden.It is known to reduce the electrical resistance of substances To use water intake to report moisture occurring in buildings.

ig Um den elektrischen Widerstand bei Feuchtigkeitsaufnahme besonders stark zu verringern, wurde den betreffenden Stoffen auch schon ein Salz beigemengt.ig About the electrical resistance when moisture is absorbed To reduce this particularly strongly, a salt has already been added to the substances concerned.

Diese bekannten Maßnahmen eignen sich jedoch nur zum Nachweis von Leckagen in Gebäuden, wobei es genügt, überhaupt auf den Fehler aufmerksam zu machen. Bei Rohrleitungen größeren Umfanges, die oft unzugänglich verlegt sind, sind aber die bekannten Ausführungsformen in der Anbringung zu umständlich und zu teuer. Außerdem genügt es nicht, auf die Tatsache von Feuchtigkeit hinzuweisen, sondern es ist besonders wichtig, den Fehlerort möglichst genau und rasch zu ermitteln. Besonders gilt dies bei schwer oder unzugänglich verlegten Leitungen, z. B. Fernheizwerken mit Rohrnetzen in engen Kanälen oder direkt im Erdreich.However, these known measures are only suitable for detecting leaks in Buildings, whereby it is sufficient to point out the error at all. In the case of larger pipelines, this is often the case are laid inaccessible, but are the known embodiments in the attachment too cumbersome and too expensive. Also, it is not enough to rely on the fact of moisture but it is particularly important to identify the location of the fault as precisely as possible and to determine quickly. This applies particularly to lines that are difficult to access or that are inaccessible, z. B. District heating plants with pipe networks in narrow channels or directly in the ground.

Die vorliegende Erfindung, die in den Abbildungen schematisch dargestellt ist, genügt diesen Forderungen. Abb. 1 zeigt ein Rohr samt Isolierung und Feuchtigkeitsanzeigevorrichtung im Schnitt, Abb. 2 in der Ansicht. Es bedeuten α das Rohr, b die Isolierung gegen Wärmegefälle und c ein elektrisches" Kabel, dessen beide Leiter gegeneinander elektrisch isoliert sind. Der Widerstand beider Kabelleiter gegeneinander ist im trockenen Zustand praktisch unendlich und verringert sich bei Vorhandensein von Feuchtigkeit so bedeutend, daß durch Strom- und Spannungsmessung der Fehlerort bestimmt werden kann, da die Widerstände der Leiter bekannt sind. Es ist auch möglich, einen der Leiter durch das Leitungsrohre zu ersetzen, so daß in diesem Falle das mit Isolierung umsponnene Kabel nur aus einem Draht besteht, der dann an dem Leitungsrohr fest anliegen muß.The present invention, which is shown schematically in the figures, meets these requirements. Fig. 1 shows a pipe including insulation and moisture display device in section, Fig. 2 in the view. Α denotes the pipe, b the insulation against heat gradients and c an electrical "cable, the two conductors of which are electrically insulated from each other. The resistance of the two cable conductors to each other is practically infinite in the dry state and decreases in the presence of moisture so significantly that it is caused by electricity - and voltage measurement the location of the fault can be determined because the resistances of the conductors are known.It is also possible to replace one of the conductors with the conduit, so that in this case the cable wrapped with insulation consists of only one wire which is then connected must be tight against the pipe.

Das Kabele wird zweckmäßig aus wärmebeständigen Isoüermitteln, z. B. Asbest, aufgebaut, die Umhüllung muß natürlich zum Eindringen des Wassers porös sein. Als Drahtmaterial findet zweckmäßig ein Metall Verwendung, das gegen Temperatur- und chemische Einflüsse möglichst unempfindlich ist. Es ist dienlich, die Isolierung des KabelsThe cable is expediently made of heat-resistant insulating means, e.g. B. Asbestos, built up, the envelope must of course be porous for the water to penetrate. A metal is expediently used as the wire material Use that is as insensitive as possible to temperature and chemical influences is. It is useful to insulate the cable

mit Stoffen, ζ. B. Salzen, zu tränken, die im feuchten Zustande eine hinreichende Verminderung des elektrischen Widerstandes gewährleisten. with fabrics, ζ. B. salts to soak, which in the moist state a sufficient reduction ensure the electrical resistance.

Bei nicht durchfeuchtetem Wärmeschutz ist der Widerstand zwischen den beiden Kabeladern sehr groß, wird aber z. B. ein Flanscht undicht und der anliegende Wärmeschutz durchfeuchtet e, so tritt ein Stromkreis auf, der von der Stromquelle g über die feuchte Stellen und das Meßinstrument/ führt und in dem letzteren angezeigt wird.If the thermal protection is not soaked through, the resistance between the two cable cores is very high. B. a flange leaks and the adjacent thermal protection is moistened e, then a circuit occurs, which leads from the power source g via the damp spots and the measuring instrument / and is displayed in the latter.

Die Anzeigevorrichtung kann, weil der Energieverbrauch verschwindend ist, auch dauernd eingeschaltet bleiben. Das Ergebnis kann in Registrierapparaten festgehalten werden bzw. ist es möglich, bei Unterschreiten eines Minimalwertes des Widerstandes ein deutliches Fehlersignal (optisch, akustisch u. dgl.) betätigen zu lassen.The display device can, because the energy consumption is negligible, too stay switched on all the time. The result can be recorded in recorders or is it possible to enter when the resistance falls below a minimum value to activate a clear error signal (optical, acoustic, etc.).

Die Bestimmung einer eventuellen Fehlerstelle geschieht in an sich bekannter meßtechnischer Weise. Eventuell kann das Leitungsnetz in verschiedene Überwachungszonen unterteilt werden, um die Fehlerstelle leichter zu bestimmen, z. B. wenn gleichzeitig bei einem Hochwasser mehrere Fehlerstellen auftreten sollten.The determination of a possible point of error takes place in a known measuring technique Way. The pipeline network can possibly be divided into different monitoring zones to make the fault location easier to determine e.g. B. if several faults occur at the same time during a flood should.

Claims (2)

Patentansprüche:Patent claims: ι. Feuchtigkeitsanzeigevorrichtung mit gleichzeitiger Fehlerortsbestimmung für gegen Wärmegefälle isolierte Rohrleitungen, dadurch gekennzeichnet, daß in der Wärmeschutzhülle zwei zeitweise oder dauernd unter elektrischer Spannung stehende, elektrisch isolierte Leiter eingebaut sind, deren gegenseitiger Isolationswiderstand sich bei Feuchtigkeitsaufnahme verringert.ι. Moisture display device with simultaneous fault location determination for Pipelines insulated against heat gradients, characterized in that in the Heat protection cover two temporarily or permanently under electrical voltage, electrically insulated conductors are installed, their mutual insulation resistance decreases with moisture absorption. 2. Feuchtigkeitsanzeigevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie aus einem mehradrigen Kabel besteht, dessen Leiter gegen Temperatur- und ehemische Einflüsse möglichst unempfindlich sind und deren gegenseitige elektrische Isolierung in an sich bekannter Weise porös und mit einem elektrolytischen Stoff getränkt ist.2. Moisture display device according to claim 1, characterized in that it consists of a multi-core cable whose conductor against temperature and former Influences are as insensitive as possible and their mutual electrical insulation in a manner known per se is porous and impregnated with an electrolytic substance. Hierzu ι Blatt ZeichnungenFor this purpose ι sheet of drawings
DEB149410D 1931-04-08 1931-04-08 Moisture indicator for insulation Expired DE579184C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB149410D DE579184C (en) 1931-04-08 1931-04-08 Moisture indicator for insulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB149410D DE579184C (en) 1931-04-08 1931-04-08 Moisture indicator for insulation

Publications (1)

Publication Number Publication Date
DE579184C true DE579184C (en) 1933-06-22

Family

ID=7001949

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB149410D Expired DE579184C (en) 1931-04-08 1931-04-08 Moisture indicator for insulation

Country Status (1)

Country Link
DE (1) DE579184C (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084092B (en) * 1958-12-08 1960-06-23 Pleiger Maschf Paul Device for reporting leaks in pipelines laid in the ground, which contain harmful fluids, e.g. B. raw oil, lead
DE1164169B (en) * 1961-03-28 1964-02-27 Felten & Guilleaume Carlswerk Probe for indicating leaks in containers or pipes containing oil, in particular heating oil
DE1203064B (en) * 1962-12-21 1965-10-14 Prakla Gmbh Method and device for finding leaks in fluid-filled pipelines
FR2081056A2 (en) * 1968-10-18 1971-11-26 Pyrotenax Ltd
DE2415640A1 (en) * 1973-04-02 1974-10-17 Reuben V Gustafson CAPACITIVE SENSOR FOR DETERMINING THE PRESENCE OF A LIQUID
DE2337983A1 (en) * 1973-07-26 1975-02-06 Brandes Bernd Gmbh CIRCUIT ARRANGEMENT FOR DETERMINATION, LOCATION AND Possibly. DISPLAY OF LEAKS IN PIPELINES
DE2640161A1 (en) * 1976-09-07 1978-03-16 Bernd Brandes Hot fluid medium cable with sensor wire - has sensor wire with threaded beads for spacing on inner tube
DE2932056A1 (en) * 1978-08-07 1980-06-26 Hitachi Ltd METHOD AND DEVICE FOR DETERMINING WHETHER A FLUID CONTAINING LEAKAGE
DE3010279A1 (en) * 1979-09-05 1981-04-02 Hans Blom TELECOMMUNICATION LINE
US4288653A (en) * 1979-06-18 1981-09-08 Blom H District-heating line and a method of manufacturing the same
US4332170A (en) * 1979-05-03 1982-06-01 Commissariat A L'energie Atomique Sub-assembly for detecting leaks of a liquid metal
DE3232211A1 (en) * 1982-08-30 1984-03-01 Bernd 2420 Eutin Brandes Medium transportation line
EP0113239A1 (en) * 1982-12-23 1984-07-11 BICC Public Limited Company An insulated pipe system
WO1993000547A1 (en) * 1991-06-26 1993-01-07 Dipl.-Ing. Wrede & Niedecken Verwaltung Gmbh Gas and/or liquid tubular duct
DE19604821C1 (en) * 1996-02-10 1997-10-02 Michael Hesky Gmbh Device for leak detection in pipelines
WO1997036159A1 (en) * 1996-03-26 1997-10-02 Siemens Aktiengesellschaft Means and method for leakage detection
EP0853208A1 (en) * 1995-06-26 1998-07-15 Uponor B.V. Multilayer pipe
WO2006089629A1 (en) * 2005-02-22 2006-08-31 Areva Np Gmbh Collector line for leakage monitoring and leakage location

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084092B (en) * 1958-12-08 1960-06-23 Pleiger Maschf Paul Device for reporting leaks in pipelines laid in the ground, which contain harmful fluids, e.g. B. raw oil, lead
DE1164169B (en) * 1961-03-28 1964-02-27 Felten & Guilleaume Carlswerk Probe for indicating leaks in containers or pipes containing oil, in particular heating oil
DE1203064B (en) * 1962-12-21 1965-10-14 Prakla Gmbh Method and device for finding leaks in fluid-filled pipelines
FR2081056A2 (en) * 1968-10-18 1971-11-26 Pyrotenax Ltd
DE2415640A1 (en) * 1973-04-02 1974-10-17 Reuben V Gustafson CAPACITIVE SENSOR FOR DETERMINING THE PRESENCE OF A LIQUID
DE2337983A1 (en) * 1973-07-26 1975-02-06 Brandes Bernd Gmbh CIRCUIT ARRANGEMENT FOR DETERMINATION, LOCATION AND Possibly. DISPLAY OF LEAKS IN PIPELINES
DE2640161A1 (en) * 1976-09-07 1978-03-16 Bernd Brandes Hot fluid medium cable with sensor wire - has sensor wire with threaded beads for spacing on inner tube
DE2932056A1 (en) * 1978-08-07 1980-06-26 Hitachi Ltd METHOD AND DEVICE FOR DETERMINING WHETHER A FLUID CONTAINING LEAKAGE
US4332170A (en) * 1979-05-03 1982-06-01 Commissariat A L'energie Atomique Sub-assembly for detecting leaks of a liquid metal
US4288653A (en) * 1979-06-18 1981-09-08 Blom H District-heating line and a method of manufacturing the same
US4288654A (en) * 1979-09-05 1981-09-08 Blom H District-heating line
DE3010279A1 (en) * 1979-09-05 1981-04-02 Hans Blom TELECOMMUNICATION LINE
DE3232211A1 (en) * 1982-08-30 1984-03-01 Bernd 2420 Eutin Brandes Medium transportation line
EP0113239A1 (en) * 1982-12-23 1984-07-11 BICC Public Limited Company An insulated pipe system
WO1993000547A1 (en) * 1991-06-26 1993-01-07 Dipl.-Ing. Wrede & Niedecken Verwaltung Gmbh Gas and/or liquid tubular duct
EP0853208A1 (en) * 1995-06-26 1998-07-15 Uponor B.V. Multilayer pipe
DE19604821C1 (en) * 1996-02-10 1997-10-02 Michael Hesky Gmbh Device for leak detection in pipelines
WO1997036159A1 (en) * 1996-03-26 1997-10-02 Siemens Aktiengesellschaft Means and method for leakage detection
WO2006089629A1 (en) * 2005-02-22 2006-08-31 Areva Np Gmbh Collector line for leakage monitoring and leakage location
US7802465B2 (en) 2005-02-22 2010-09-28 Areva Np Gmbh Collecting conduit, apparatus and method for leakage monitoring and leakage location

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