EP3286993A1 - Use of a multiple screw thread in an ex d housing - Google Patents

Use of a multiple screw thread in an ex d housing

Info

Publication number
EP3286993A1
EP3286993A1 EP16713378.4A EP16713378A EP3286993A1 EP 3286993 A1 EP3286993 A1 EP 3286993A1 EP 16713378 A EP16713378 A EP 16713378A EP 3286993 A1 EP3286993 A1 EP 3286993A1
Authority
EP
European Patent Office
Prior art keywords
housing
thread
field device
cover
threads
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Withdrawn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
EP16713378.4A
Other languages
German (de)
French (fr)
Inventor
Andreas Krumbholz
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 EP3286993A1 publication Critical patent/EP3286993A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1462—Mounting supporting structure in casing or on frame or rack for programmable logic controllers [PLC] for automation or industrial process control

Definitions

  • the invention relates to a field device of automation technology, comprising a housing and a lid for closing the housing, wherein the housing after closing by means of the lid fulfills all Ex d requirements.
  • Factory automation technology field devices are often used, which serve for the detection and / or influencing of process variables.
  • sensors such as
  • Conductivity meters etc., which record the corresponding process variables level, flow, pressure, temperature, pH or conductivity.
  • actuators such as valves or pumps, via which the flow of a liquid in a pipe section or the level in a container can be changed.
  • field devices are all devices that are used close to the process and that provide or process process-relevant information. In connection with the invention are under
  • Network components are manufactured and distributed by Endress + Hauser.
  • the housing is designed cup-shaped and is made in many cases of a non-conductive material.
  • the materials used are plastics or composites.
  • the housing may also consist of a metal or a metal alloy.
  • a housing includes a Level gauge 60% aluminum, 25% plastic and 15% stainless steel and a housing of a pressure gauge includes only aluminum and stainless steel and no plastic.
  • a detachable connection between an Ex-d housing (Ex-d explosion protection - Flameproof enclosure) and an Ex-d cover, realized by means of a catchy metric thread, eg M80x1, 5.
  • the design according to the Ex-D standard requires at least seven or more engaged threads to the
  • Safety margin for chamfer and thread outlet is the thread length at about 13.5mm (7x1, 5mm + 3mm surcharge), which in practice about eight
  • the invention is based on the object, a field device of
  • the object is achieved by the subject invention.
  • the invention relates to a field device of
  • Automation technology comprising a housing having an opening for receiving field device components, wherein the housing has a first thread to the opening edge, a lid for closing the opening of the housing, wherein the lid has a second thread at the edge, wherein the first and second threads complementary to each other are configured so that the housing after closing by means of the lid all Ex-d requirements fulfilled characterized in that the first and second threads are designed as multi-threaded.
  • the first and second threads are designed as sesumnese thread. According to a favorable embodiment, the first and second threads axially at least five, preferably eight courses.
  • FIG. 1 shows a longitudinal section of a housing of a field device of
  • FIG. 2 shows a front view of a lid according to the invention with four parallel passages forming a four-turn thread for a housing with a four-start thread.
  • the housing 1 shows a longitudinal section of a housing 1 of a field device 1 of the automation technology according to the prior art.
  • the housing 1 comprises a housing 2 and a cover 6.
  • the housing 2 and the cover 6 are designed cup-shaped.
  • the housing 2 is suitable to
  • the housing 2 has in a outer edge region to the opening 3 a first Thread 5 on.
  • the cover 6 has a second thread 7 on an outer edge region.
  • the first and second threads 5, 7 are complementary to each other
  • the housing 1 fulfills all Ex-d requirements.
  • Fig. 2 shows a front view of a cover 6 according to the invention for a housing 2 with a four-start thread.
  • the second thread 7 of the lid 6 is designed as a four-start thread.
  • the lid 6 has in this embodiment, a second thread 7 with eight courses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

The invention relates to a field device used in automation technology, comprising a housing (2) with an opening (3) for receiving field device components (4). The housing (2) has a first thread (5) on the edge facing the opening (3) and a cover (6) for closing the opening (3) of the housing (2), the edge of the cover (6) having a second thread (7), wherein the first and second thread (5, 7) are designed in a complementary manner such that the housing (2) satisfies all Ex d requirements after being closed by means of the cover (6). The invention is characterized in that the first and second thread (5, 7) are designed as multiple screw threads.

Description

Verwendung eines mehrgängigen Gewindes in einem Ex-d-Gehäuse  Use of a multi-thread thread in an Ex-d housing
Die Erfindung bezieht sich auf ein Feldgerät der Automatisierungstechnik, umfassend ein Gehäuse und einen Deckel zum Verschließen des Gehäuses, wobei das Gehäuse nach dem Verschließen mittels des Deckels sämtliche Ex- d Anforderungen erfüllt. The invention relates to a field device of automation technology, comprising a housing and a lid for closing the housing, wherein the housing after closing by means of the lid fulfills all Ex d requirements.
In der Automatisierungstechnik, insbesondere in der Prozess- und In automation technology, especially in the process and
Fabrikautomatisierungstechnik, werden vielfach Feldgeräte eingesetzt, die zur Erfassung und/oder Beeinflussung von Prozessgrößen dienen. Zur Erfassung von Prozessgrößen dienen Sensoren, wie beispielsweise Factory automation technology, field devices are often used, which serve for the detection and / or influencing of process variables. To capture process variables are sensors, such as
Füllstandsmessgeräte, Durchflussmessgeräte, Druck- und Level gauges, flowmeters, pressure and pressure gauges
Temperaturmessgeräte, pH-Redoxpotentialmessgeräte, Temperature measuring instruments, pH redox potential measuring devices,
Leitfähigkeitsmessgeräte, usw., welche die entsprechenden Prozessvariablen Füllstand, Durchfluss, Druck, Temperatur, pH-Wert bzw. Leitfähigkeit erfassen. Zur Beeinflussung von Prozessvariablen dienen Aktoren, wie zum Beispiel Ventile oder Pumpen, über die der Durchfluss einer Flüssigkeit in einem Rohrleitungsabschnitt bzw. der Füllstand in einem Behälter geändert werden kann. Als Feldgeräte werden im Prinzip alle Geräte bezeichnet, die prozessnah eingesetzt werden und die prozessrelevante Informationen liefern oder verarbeiten. Im Zusammenhang mit der Erfindung werden unter Conductivity meters, etc., which record the corresponding process variables level, flow, pressure, temperature, pH or conductivity. To influence process variables are actuators, such as valves or pumps, via which the flow of a liquid in a pipe section or the level in a container can be changed. In principle, field devices are all devices that are used close to the process and that provide or process process-relevant information. In connection with the invention are under
Feldgeräten durchaus auch Remote I/Os, Funkadapter bzw. allgemein Geräte verstanden, die auf der Feldebene angeordnet sind und über einen Datenbus miteinander kommunizieren. Oftmals redet man in diesem Zusammenhang auch von Netzwerk-komponenten. Eine Vielzahl solcher Feldgeräte oderField devices quite well understood remote I / Os, radio adapters or general devices that are located at the field level and communicate with each other via a data bus. Often one speaks in this context of network components. A variety of such field devices or
Netzwerkkomponenten wird von der Firma Endress + Hauser hergestellt und vertrieben. Network components are manufactured and distributed by Endress + Hauser.
Feldgeräte weisen üblicherweise ein Gehäuse zur Aufnahme einer Field devices usually have a housing for receiving a
Elektronikeinheit und einer Sensoreinheit auf. Das Gehäuse ist topfförmig ausgestaltet und ist in vielen Fällen aus einem nicht leitfähigen Material gefertigt. Als Materialien werden Kunststoffe oder Verbundwerkstoffe verwendet. Das Gehäuse kann jedoch auch aus einem metall oder einer Metalllegierung bestehen. Typischerweise umfasst ein Gehäuse eines Füllstandsmessgeräts 60 % Aluminium, 25 % Kunststoff und 15 % Edelstahl und ein Gehäuse eines Druckmessgeräts umfasst lediglich Aluminium und Edelstahl und gar kein Kunststoff. Im Stand der Technik wird eine lösbare Verbindung zwischen einem Ex-d- Gehäuse (Ex-d = Explosionsschutz - Druckfeste Kapselung) und einem Ex-d- Deckel, mittels eines eingängigen metrischen Gewindes, z.B. M80x1 ,5 realisiert. Die Ausführung nach der Ex-d-Norm erfordert mindestens sieben oder mehr im Eingriff befindliche Gewindegänge, um die Electronic unit and a sensor unit. The housing is designed cup-shaped and is made in many cases of a non-conductive material. The materials used are plastics or composites. However, the housing may also consist of a metal or a metal alloy. Typically, a housing includes a Level gauge 60% aluminum, 25% plastic and 15% stainless steel and a housing of a pressure gauge includes only aluminum and stainless steel and no plastic. In the prior art, a detachable connection between an Ex-d housing (Ex-d = explosion protection - Flameproof enclosure) and an Ex-d cover, realized by means of a catchy metric thread, eg M80x1, 5. The design according to the Ex-D standard requires at least seven or more engaged threads to the
Flammendurchschlagfestigkeit über die Spaltlänge sicher zu stellen. MitTo ensure flame resistance over the gap length. With
Sicherheitszuschlag für Fase und Gewindeauslauf liegt die Gewindelänge bei ca. 13,5mm (7x1 ,5mm + 3mm Zuschlag), was in der Praxis ca. acht Safety margin for chamfer and thread outlet is the thread length at about 13.5mm (7x1, 5mm + 3mm surcharge), which in practice about eight
Umdrehungen des Deckels bedeutet. Dies ist für die interne Montage der Feldgerätekomponenten und die Wartung des Feldgeräts nicht optimal, da es einerseits zeitaufwändig und andererseits eine hohe Anzahl der Revolutions of the lid means. This is not optimal for the internal mounting of the field device components and the maintenance of the field device, since it is both time-consuming and a high number of
Verschraubungen ergonomisch ungünstig ist. Fittings ergonomically unfavorable.
Der Erfindung liegt die Aufgabe zugrunde, ein Feldgerät der The invention is based on the object, a field device of
Automatisierungstechnik vorzuschlagen, welches die Ex-d-Anforderungen erfüllt und trotzdem schnell auf- und zugeschraubt werden kann. To propose automation technology that meets the requirements of the Ex-D and can still be quickly opened and closed.
Die Aufgabe wird erfindungsgemäß durch den Gegenstand der Erfindung gelöst. Gegenstand der Erfindung ist ein Feldgerät der The object is achieved by the subject invention. The invention relates to a field device of
Automatisierungstechnik, umfassend ein Gehäuse mit einer Öffnung zum Aufnehmen von Feldgerätekomponenten, wobei das Gehäuse randseitig zur Öffnung ein erstes Gewinde aufweist, einen Deckel zum Verschließen der Öffnung des Gehäuses, wobei der Deckel randseitig ein zweites Gewinde aufweist, wobei das erste und zweite Gewinde komplementär zueinander ausgestaltet sind, so dass das Gehäuse nach dem Verschließen mittels des Deckels sämtliche Ex-d Anforderungen erfüllt dadurch gekennzeichnet, dass das erste und zweite Gewinde als mehrgängige Gewinde ausgestaltet sind. Automation technology, comprising a housing having an opening for receiving field device components, wherein the housing has a first thread to the opening edge, a lid for closing the opening of the housing, wherein the lid has a second thread at the edge, wherein the first and second threads complementary to each other are configured so that the housing after closing by means of the lid all Ex-d requirements fulfilled characterized in that the first and second threads are designed as multi-threaded.
Durch das Parallelschalten von einzelnen Gewindegängen mit höheren Steigungen der Gewindegänge, wird die Anzahl der Umdrehungen reduziert und somit ist ein schnelleres Verschrauben mit weniger Umdrehungen möglich. Ferner ist durch die höhere Steigung der Gewindegänge bei gleichem Anzugsmoment weniger Vorspannung im Gewinde, was dazu führt, dass der Deckel leichter geöffnet werden kann. Gleichzeitig bleibt der Weg für die Flammendurchschlagsfestigkeit bzw. für die Zündfunken gleich. By connecting individual threads in parallel with higher pitches of the threads, the number of turns is reduced and thus faster screwing with fewer turns is possible. Furthermore, the higher pitch of the threads at the same tightening torque less bias in the thread, which means that the lid can be opened more easily. At the same time the way for the flame resistance and for the spark remains the same.
Gemäß einer vorteilhaften Ausgestaltung sind das erste und zweite Gewinde als viergängige Gewinde ausgestaltet. Gemäß einer günstigen Ausführungsform weist das erste und zweite Gewinde axial mindestens fünf, bevorzugt acht Gänge auf. According to an advantageous embodiment, the first and second threads are designed as viergängige thread. According to a favorable embodiment, the first and second threads axially at least five, preferably eight courses.
Die Aufgabe der Erfindung wird ebenfalls gelöst durch die Verwendung eines mehrgängigen Gewindes im Deckel-Schließmechanismus eines die Ex-d Anforderungen erfüllenden Gehäuses eines Feldgeräts der The object of the invention is also achieved by the use of a multi-thread in the lid-closing mechanism of the ex-D requirements fulfilling housing of a field device of
Automatisierungstechnik. Automation technology.
Die Erfindung wird anhand der nachfolgenden Zeichnungen näher erläutert. Es zeigt: The invention will be explained in more detail with reference to the following drawings. It shows:
Fig. 1 : einen Längsschnitt eines Gehäuses eines Feldgeräts der 1 shows a longitudinal section of a housing of a field device of
Automatisierungstechnik nach dem Stand der Technik, und Fig. 2: eine Vorderansicht eines erfindungsgemäßen Deckels mit vier parallel geschalteten Gängen, die ein viergängiges Gewinde für ein Gehäuse mit einem viergängigen Gewinde bilden. 2 shows a front view of a lid according to the invention with four parallel passages forming a four-turn thread for a housing with a four-start thread.
Fig. 1 zeigt einen Längsschnitt eines Gehäuse 1 eines Feldgeräts 1 der Automatisierungstechnik nach dem Stand der Technik. Das Gehäuse 1 umfasst ein Gehäuse 2 und einen Deckel 6. Das Gehäuse 2 und der Deckel 6 sind topfförmig ausgestaltet. Das Gehäuse 2 ist geeignet, um 1 shows a longitudinal section of a housing 1 of a field device 1 of the automation technology according to the prior art. The housing 1 comprises a housing 2 and a cover 6. The housing 2 and the cover 6 are designed cup-shaped. The housing 2 is suitable to
Feldgerätekomponenten 4 aufzunehmen und weist hierzu eine Öffnung 3 auf. Das Gehäuse 2 weist in einem äußeren Randbereich zur Öffnung 3 ein erstes Gewinde 5 auf. Der Deckel 6 weist an einem äußeren Randbereich ein zweites Gewinde 7 auf. To receive field device components 4 and has for this purpose an opening 3. The housing 2 has in a outer edge region to the opening 3 a first Thread 5 on. The cover 6 has a second thread 7 on an outer edge region.
Das erste und zweite Gewinde 5, 7 sind komplementär zueinander The first and second threads 5, 7 are complementary to each other
ausgestaltet. Wird das Gehäuse 2 mittels des Deckels 6 verschlossen, erfüllt das Gehäuse 1 sämtliche Ex-d Anforderungen. designed. If the housing 2 is closed by means of the cover 6, the housing 1 fulfills all Ex-d requirements.
Fig. 2: zeigt eine Vorderansicht eines erfindungsgemäßen Deckels 6 für ein Gehäuse 2 mit einem viergängigen Gewinde. Das zweite Gewinde 7 des Deckels 6 ist als ein viergängiges Gewinde ausgestaltet. Der Deckel 6 weist in dieser Ausgestaltung ein zweites Gewinde 7 mit acht Gängen auf. Fig. 2: shows a front view of a cover 6 according to the invention for a housing 2 with a four-start thread. The second thread 7 of the lid 6 is designed as a four-start thread. The lid 6 has in this embodiment, a second thread 7 with eight courses.
Bezugszeichenliste Gehäuse eines Feldgeräts der Automatisierungstechnik Gehäuse Reference numeral list Housing of a field device of the automation technology Housing
Öffnung opening
Feldgerätekomponenten Field device components
erstes Gewinde first thread
Deckel cover
Zweites Gewinde Second thread

Claims

Patentansprüche claims
1 . Feldgerät der Automatisierungstechnik, umfassend 1 . Field device of automation technology, comprising
ein Gehäuse (2) mit einer Öffnung (3) zum Aufnehmen von  a housing (2) having an opening (3) for receiving
Feldgerätekomponenten (4), wobei das Gehäuse (2) randseitig zur Öffnung (3) ein erstes Gewinde (5) aufweist, Field device components (4), wherein the housing (2) has a first thread (5) at the edge of the opening (3),
einen Deckel (6) zum Verschließen der Öffnung (3) des Gehäuses (2), wobei der Deckel (6) randseitig ein zweites Gewinde (7) aufweist,  a cover (6) for closing the opening (3) of the housing (2), the cover (6) having a second thread (7) at the edge,
wobei das erste und zweite Gewinde (5, 7) komplementär zueinander ausgestaltet sind, so dass das Gehäuse (2) nach dem Verschließen mittels des Deckels (6) sämtliche Ex-d Anforderungen erfüllt wherein the first and second threads (5, 7) are designed complementary to each other, so that the housing (2) after closing by means of the cover (6) meets all Ex-d requirements
dadurch gekennzeichnet, characterized,
dass das erste und zweite Gewinde (5, 7) als mehrgängige Gewinde ausgestaltet sind. in that the first and second threads (5, 7) are configured as multi-thread threads.
2. Feldgerät nach Anspruch 1 , wobei das erste und zweite Gewinde (5, 7) als viergängige Gewinde ausgestaltet sind. 2. Field device according to claim 1, wherein the first and second threads (5, 7) are designed as viergängige thread.
3. Feldgerät nach Anspruch 1 oder 2, wobei das erste und zweite Gewinde (5, 7) axial mindestens fünf, bevorzugt acht Gänge aufweist. 3. Field device according to claim 1 or 2, wherein the first and second threads (5, 7) axially at least five, preferably eight courses.
4. Verwendung eines mehrgängigen Gewindes im Deckel- Schließmechanismus eines die Ex-d Anforderungen erfüllenden Gehäuses (2) eines Feldgeräts der Automatisierungstechnik. 4. Use of a multi-thread in the lid closing mechanism of a Ex-d requirements fulfilling housing (2) of a field device of automation technology.
EP16713378.4A 2015-04-24 2016-03-24 Use of a multiple screw thread in an ex d housing Withdrawn EP3286993A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015106350.6A DE102015106350A1 (en) 2015-04-24 2015-04-24 Use of a multi-thread thread in an Ex-d housing
PCT/EP2016/056592 WO2016169728A1 (en) 2015-04-24 2016-03-24 Use of a multiple screw thread in an ex d housing

Publications (1)

Publication Number Publication Date
EP3286993A1 true EP3286993A1 (en) 2018-02-28

Family

ID=55646561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16713378.4A Withdrawn EP3286993A1 (en) 2015-04-24 2016-03-24 Use of a multiple screw thread in an ex d housing

Country Status (5)

Country Link
US (2) US20180098443A1 (en)
EP (1) EP3286993A1 (en)
CN (1) CN107532927A (en)
DE (1) DE102015106350A1 (en)
WO (1) WO2016169728A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223733B3 (en) 2017-12-22 2019-02-07 Siemens Aktiengesellschaft Explosion-proof flameproof housing for electrical equipment
CN112954821B (en) * 2019-11-26 2022-04-19 华硕电脑股份有限公司 Method and apparatus for sidelink signaling radio bearer establishment in a wireless communication system

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Publication number Priority date Publication date Assignee Title
US3527372A (en) * 1968-12-02 1970-09-08 Republic Molding Corp Container
DE2049993A1 (en) * 1970-10-12 1972-04-13 Maehler & Kaege Ag Flameproof, encapsulated incandescent lamp luminaire
US4453647A (en) * 1983-01-26 1984-06-12 Neat Benjamin C Plastic container having threaded closure
US4961512A (en) * 1989-01-30 1990-10-09 Holdt J W Von Childproof closure for large containers
US5115862A (en) * 1990-08-08 1992-05-26 Hastings Phillip J Electrical grounding device for wells
US5052950A (en) * 1990-08-14 1991-10-01 Pyromation, Inc. Terminal connector head
DE59609023D1 (en) * 1996-10-18 2002-05-08 Endress Hauser Gmbh Co Housing for industrial applications
DE102008042972A1 (en) * 2008-10-20 2010-04-22 Endress + Hauser Flowtec Ag Measuring device for determining and monitoring chemical and physical measured variable, is based on process automation technology, and has housing, which is provided with two walls
CN202039976U (en) * 2011-04-29 2011-11-16 浙江银轮机械股份有限公司 Exhaust gas recirculation cooler with water jackets in gas chambers
CN102570158B (en) * 2012-02-22 2013-09-25 上海航天科工电器研究院有限公司 Anti-explosion connector
DE102014119455A1 (en) * 2014-12-22 2016-06-23 Endress + Hauser Gmbh + Co. Kg Housing for a field device of automation technology

Also Published As

Publication number Publication date
WO2016169728A1 (en) 2016-10-27
CN107532927A (en) 2018-01-02
US20190223308A1 (en) 2019-07-18
US20180098443A1 (en) 2018-04-05
DE102015106350A1 (en) 2016-10-27

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