EP1585945A2 - Systeme de fixation pour un appareil de mesure destine a surveiller et/ou determiner un niveau - Google Patents

Systeme de fixation pour un appareil de mesure destine a surveiller et/ou determiner un niveau

Info

Publication number
EP1585945A2
EP1585945A2 EP04703394A EP04703394A EP1585945A2 EP 1585945 A2 EP1585945 A2 EP 1585945A2 EP 04703394 A EP04703394 A EP 04703394A EP 04703394 A EP04703394 A EP 04703394A EP 1585945 A2 EP1585945 A2 EP 1585945A2
Authority
EP
European Patent Office
Prior art keywords
device housing
elongated
fastening system
elongated unit
cutting ring
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.)
Withdrawn
Application number
EP04703394A
Other languages
German (de)
English (en)
Inventor
Armin Wendler
Robert Schmidt
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.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
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 Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of EP1585945A2 publication Critical patent/EP1585945A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid

Definitions

  • the invention relates to a fastening system for a measuring device for monitoring and / or determining the fill level of a medium in a container, with at least one device housing, and with at least one elongated unit.
  • elongated units are e.g. used in capacitive measurement technology as an electrode that is inserted into a container with a medium.
  • the fill level of the medium changes the capacitance of the capacitor, one electrode of which is the elongated units, and the fill level can thus be determined and / or monitored.
  • Another measurement method uses e.g. electromagnetic pulses are sent to the surface of the medium on the elongated unit immersed in the medium, which serves as a waveguide. The level can then also be derived from the reflected signal.
  • Another application is e.g. is a conductive probe in which the electrical resistance of the medium is measured and in which the
  • measuring devices with an elongated unit are usually mounted on or on a container containing the medium to be measured, wherein the device housing is often fastened in or on a container wall in such a way that the elongated unit is inside the container and into the medium protrudes.
  • the elongated units are either themselves electrically conductive or have at least one electrical conductor inside.
  • the elongated units may also be covered on the outside with an electrically insulating layer. This layer offers protection against short circuits or, for example, protection against aggressive media.
  • the elongated units are usually connected to a measuring device electronics in which the measuring signals are generated or processed.
  • the electronics in turn are usually connected to a measuring or control room or another higher-level unit, in which the level measurement values are processed and processed.
  • the elongated units have to be adapted to different conditions, i.e. depending on the dimensions of the container, they must be longer or shorter. They must also be able to be replaced if necessary, e.g. if the medium attacks or decomposes the elongated units. It should be possible that the elongated units can be easily replaced.
  • the object of the invention is to propose a fastening system by means of which the elongated unit can be fastened on / in the device housing.
  • the object is achieved in that at least one cutting ring is provided in the device housing, which cuts into the outer layer of the end of the elongated unit facing away from the process in such a way that the elongated unit is connected to the device housing electrically, pressure and / or tensile.
  • Such cutting rings and the use for connecting pipelines can be found, for example, in patent specification DE 40 38 539.
  • the invention has the great advantage that it is very simple.
  • a particular advantage is that no special requirements are imposed on the nature and design of the elongated unit, since the connection via the components is made possible. For example, there is no need for threaded screwing in which contact corrosion could take place.
  • One advantage, for example, is that the cutting ring also performs a sealing function.
  • the cutting rings are also standardized work pieces (DIN 2353 or DIN EN ISO 8434-1), which are therefore very inexpensive and simple. Furthermore, the electrical connection is also made possible. Depending on the configuration, the cutting ring can also remove an insulating layer on the outer surface of the elongated unit. The advantage would then be that this insulating layer on the elongated unit is only lifted where it has to be lifted for the electrical contact. This is done by attaching the elongated unit and by the attachment process. This means that no laborious calculations for the dimensioning of this section to be freed from the insulation or fine adjustments in this regard need to be carried out.
  • the cutting ring is attached to the elongated unit. Since the cutting ring is located in the device housing, the elongated unit cannot be pulled out of the device housing, for example.
  • the device housing can also be designed in such a way that it receives the cutting ring, for example in a recess, in such a way that the cutting ring also performs a sealing function. This would enable, for example, a gap-free design, as is required, for example, in the food industry.
  • a great advantage is that the cutting ring can make good electrical contact with the elongated unit.
  • the invention also offers the advantage that the elongated unit is not unscrewed by rotary movements can, as can be caused, for example, by an agitator in the container.
  • an advantageous embodiment provides that the diameter of the elongated unit is smaller than its length. Furthermore, an embodiment includes that the elongated unit is a rope, a cable, a rod or a tube. This covers the general definitions of a rope of a rope probe. The diameter is usually in the mm range, although the length can certainly be in the m range.
  • an installation sleeve is provided in the device housing, which includes the cutting ring and a section of the elongated unit.
  • This installation sleeve can serve to encapsulate the end of the elongated unit, which is located in the device housing. This provides greater protection for the device. So this is an extended version of the version, that the cutting ring is accommodated directly in the device housing.
  • a union nut which comprises the cutting ring and which closes the installation sleeve in the direction of the process. If the elongated unit is pulled on the side of the process, the cutting ring is stopped by the union nut. Furthermore, the union nut offers a seal against the medium.
  • An advantageous embodiment includes that a recess is provided in the union nut, so that an O-ring is attached for sealing. This O-ring prevents the medium from e.g. gets into the device housing.
  • a screw-in element which is such that it receives a part of the elongated unit.
  • An advantageous one The embodiment provides that the screw-in element and the union nut are obtained and arranged in such a way that they are detachably connected to one another. Thus, a secure and tight connection can also be made possible here. It can be provided, for example, that the screw-in element has a section that has a smaller one
  • the union nut is the end of the installation sleeve in the direction of the process. , Furthermore, this can result in a higher stability of the installation sleeve. This also creates further protection of the device against the penetration of the medium, since the mounting sleeve also in the
  • Process opposite direction is completed, i.e.
  • the end of the elongated unit is virtually encapsulated on the side facing away from the process via the installation sleeve. If medium penetrates into the installation sleeve via the elongated unit, the medium cannot nevertheless get into the housing in this way. Furthermore, the passage for the area between the union nut and the device housing is sealed by the O-ring on the union nut.
  • an advantageous embodiment includes that the screw-in element is designed such that it is electrically connected to the cutting ring.
  • the cutting ring makes electrical contact with the elongated unit, which is continued via the screw-in element.
  • an insulating layer can also be provided on the outside of the screw-in element.
  • An advantageous embodiment includes that a holding element is provided in the device housing, in which at least one elongated unit is fastened.
  • the construction of the installation sleeve should therefore be fitted into the device housing as effectively as possible.
  • the appropriate design of the device housing allows the mounting element to be fixed as optimally and securely as possible.
  • a pressure which is exerted by the fixation acts only on the union nuts.
  • suitable configurations of the mounting element such as injection molded seals, allow several elongated units to be attached in an electrically insulated manner.
  • Fig. 1 an exploded view of the elongated unit and the fastening system
  • Fig. 3 a section through the device housing with built-in elongated units.
  • the union nut 3 is placed on section 2.
  • the cutting ring 4 comes into the union nut 3.
  • the screw-in element 5 is located above it.
  • the union nut 3 has a recess 15 which allows an O-ring 6 to be fastened for sealing purposes.
  • the screw-in element 5 is inserted into the union nut 3 via the section 16 and, if necessary, screwed there.
  • the screw-in element 5 and the union nut 3 thus form the installation sleeve 14.
  • FIG. 2 shows the holding element 7. It takes on the task, inter alia, that the elongated units 1 are installed in the device housing 13 in a vibration-proof manner. In the case shown, three elongated units 1 are provided.
  • the mounting element 7 is designed such that the elongated units 1 are surrounded by seals. Screw terminals 10 are attached to the end of the screw-in elements 5 in order to be able to establish the electrical connection with the elongated units 1.
  • holes 12 are provided in the screw-in elements 5. These holes 12 also facilitate the exchange of the elongated units 1.
  • the screws 9 serve to fix the mounting element 7 in the device housing 13.
  • the mounting element 7 contains seals, which among other things have the task of electrically isolating the individual elongated units 1 from one another in order to prevent short circuits avoid.
  • FIG. 3 shows a cross section through the device housing 13 with a built-in mounting element 7 and elongated units 1 located therein. It can be seen here how the screws 9 fix the mounting element 7 in the device housing 13.
  • the device housing 13 is designed in such a way that the union nut 3 is received in a suitable recess.
  • Installation sleeve 14 - consisting of union nut 3 and screw-in element 5 - provides a seal for the device against the medium.
  • Another possibility would be that the cutting ring 4 is fitted directly into the device housing 13 without a union nut 3. This would save the union nut 3 and the O-ring 6 and, for example, a gapless installation could be realized.
  • the cutting ring 4 would then also perform a sealing function.
  • this embodiment would also mean that the fastening system of the invention provides an electrical fastening that is sealed against the medium, is pressure-resistant and tensile, and is also secure against the rotation of the elongated unit 1.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Cable Accessories (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un système de fixation pour un appareil de mesure destiné à surveiller et/ou déterminer le niveau d'un milieu dans un réservoir, lequel système présente au moins un boîtier d'appareil (13) et au moins une unité de forme allongée (1). Selon ladite invention, au moins une bague coupante (4), placée dans le boîtier d'appareil (13), réalise une entaille dans la couche extérieure de l'extrémité de l'unité de forme allongée (1) située à l'opposé du processus, de sorte que cette unité de forme allongée (1) est reliée électriquement au boîtier d'appareil (13) de façon résistante à la pression et/ou à la traction.
EP04703394A 2003-01-20 2004-01-20 Systeme de fixation pour un appareil de mesure destine a surveiller et/ou determiner un niveau Withdrawn EP1585945A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20300901U 2003-01-20
DE20300901U DE20300901U1 (de) 2003-01-20 2003-01-20 Befestigungssystem für ein Messgerät zur Überwachung und/oder Bestimmung eines Füllstands
PCT/EP2004/000418 WO2004065799A2 (fr) 2003-01-20 2004-01-20 Systeme de fixation pour un appareil de mesure destine a surveiller et/ou determiner un niveau

Publications (1)

Publication Number Publication Date
EP1585945A2 true EP1585945A2 (fr) 2005-10-19

Family

ID=30128941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04703394A Withdrawn EP1585945A2 (fr) 2003-01-20 2004-01-20 Systeme de fixation pour un appareil de mesure destine a surveiller et/ou determiner un niveau

Country Status (6)

Country Link
US (1) US7373818B2 (fr)
EP (1) EP1585945A2 (fr)
CN (1) CN100432635C (fr)
DE (1) DE20300901U1 (fr)
RU (1) RU2296955C2 (fr)
WO (1) WO2004065799A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004060119A1 (de) * 2004-12-13 2006-06-14 Endress + Hauser Gmbh + Co. Kg Vorrichtung zur Bestimmung und/oder Überwachung der Prozessgröße Füllstand eines Füllguts in einem Behälter
DE102007037364A1 (de) * 2007-08-08 2009-02-12 Robert Bosch Gmbh Flüssigkeitssensor
DE102010038732B4 (de) 2010-07-30 2023-07-27 Endress+Hauser SE+Co. KG Vorrichtung und Verfahren zur Sicherung der Befestigung eines koaxial um eine Messsonde angeordneten Rohres einer Messsondeneinheit eines Füllstandsmessgerätes an einem Prozessanschlusselement
DE102013010170B4 (de) 2013-06-19 2015-01-08 Krohne Messtechnik Gmbh Messgerät
CN107003158A (zh) 2014-12-03 2017-08-01 格兰富控股联合股份公司 传感器组件
US20210381874A1 (en) * 2019-02-21 2021-12-09 Limited Liability Company "Omnikomm Tehnologii" Capacitive level sensor, sensitive element of the capacitive level sensor, electrode housing for the capacitive level sensor
RU2771406C1 (ru) * 2020-12-31 2022-05-04 Общество С Ограниченной Ответственностью "Омникомм Онлайн" Резервуар для хранения топлива, содержащий один емкостный датчик уровня границы раздела сред
RU2761540C1 (ru) * 2020-12-31 2021-12-09 Осаюхинг Омникомм Емкостный датчик уровня границы раздела сред c соединительной муфтой для корпуса для электродов
RU2761093C9 (ru) * 2020-12-31 2022-02-22 Осаюхинг Омникомм Емкостный датчик уровня границы раздела сред с соединительной муфтой для корпуса для электродов

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US3864974A (en) * 1971-01-11 1975-02-11 George P Rauchwerger Capacitance probe and system for precision measurement of liquid level
US3748551A (en) * 1972-04-10 1973-07-24 Robertshaw Controls Co High temperature and pressure capacitance probe
DE2736516A1 (de) 1977-08-12 1979-02-22 Sueddeutsche Bremsen Ag Stroemungswaechter
CN87206697U (zh) * 1987-04-24 1988-03-23 李嘉葆 接线器
DE3843450A1 (de) * 1988-12-23 1990-06-28 Meike Froehlich Verfahren und vorrichtung zum vormontieren eines schneidrings oder keilrings einer rohrverschraubung
US5065139A (en) * 1990-05-22 1991-11-12 Joseph Shefsky Portable level sensing apparatus
DE4038539C1 (fr) * 1990-12-03 1992-04-30 Parker-Ermeto Gmbh, 4800 Bielefeld, De
US5167155A (en) * 1991-11-15 1992-12-01 Betz Laboratories, Inc. Submersible liquid level measuring system and method of use
DE9310561U1 (de) 1993-07-15 1993-10-21 Ier Mes Und Regeltechnik Eberh Befestigungs- und Fixiervorrichtung für lotrecht auszurichtende Meßwerkzeuge
CN2674407Y (zh) * 2003-12-18 2005-01-26 承德市本特万达仪表有限公司 插入式电磁流量计传感器

Non-Patent Citations (1)

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Title
See references of WO2004065799A2 *

Also Published As

Publication number Publication date
WO2004065799A3 (fr) 2004-10-07
WO2004065799A2 (fr) 2004-08-05
DE20300901U1 (de) 2004-01-08
CN1742194A (zh) 2006-03-01
RU2005126405A (ru) 2006-01-10
US7373818B2 (en) 2008-05-20
RU2296955C2 (ru) 2007-04-10
US20060243871A1 (en) 2006-11-02
CN100432635C (zh) 2008-11-12

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