WO2019110848A1 - Pince de mise a la terre pour éléments de tuyauterie metalliques, et système de tuyauterie auto - Google Patents

Pince de mise a la terre pour éléments de tuyauterie metalliques, et système de tuyauterie auto Download PDF

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Publication number
WO2019110848A1
WO2019110848A1 PCT/EP2018/084231 EP2018084231W WO2019110848A1 WO 2019110848 A1 WO2019110848 A1 WO 2019110848A1 EP 2018084231 W EP2018084231 W EP 2018084231W WO 2019110848 A1 WO2019110848 A1 WO 2019110848A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
end portion
elements
grounding clip
pipeline
Prior art date
Application number
PCT/EP2018/084231
Other languages
German (de)
English (en)
Inventor
Christian Capsius
Original Assignee
Minimax Gmbh & 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 Minimax Gmbh & Co. Kg filed Critical Minimax Gmbh & Co. Kg
Publication of WO2019110848A1 publication Critical patent/WO2019110848A1/fr

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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
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/01—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means specially adapted for realising electrical conduction between the two pipe ends of the joint or between parts thereof
    • 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
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
    • F16L3/12—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing
    • F16L3/123—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing and extending along the attachment surface
    • F16L3/1233—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing and extending along the attachment surface the member being of metal, with or without an other layer of other material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/643—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for rigid cylindrical bodies

Definitions

  • the present invention relates to a grounding clip for metallic piping elements.
  • the invention also relates to a piping system having at least a first pipe element and a grounding clip electrically conductively connected to the pipe element.
  • the invention particularly relates to stationary fire extinguishing systems in areas with significant risk factors.
  • risk factors include, for example, potentially explosive areas or areas in the area of influence of high-voltage systems, in which electrical currents must be safely dissipated via the piping systems of the fire-extinguishing systems or even static charges.
  • Inadvertent transmission of electrical currents can in principle occur as a result of lightning strikes, or as a result of defects in electrical systems.
  • accidental electric shocks may occur.
  • each pipe element individually is provided by means of a grounding line, which is connected as a potential equalization ladder with a potential equalization rail, or by the pipe elements are electrically connected to each other, and then only a few pipe elements are effectively connected centrally to a potential equalization conductor, which in turn is guided to a potential equalization rail.
  • earthing band clamps are known for connecting the pipe elements to the equipotential bonding conductors. These consist of an electrically conductive band clamp, which is similar in its bandwidth by means of a clamping screw, a worm drive, adjustable to ensure sufficient voltage an electrically conductive contact with the pipe element. It is disadvantageously felt in this system that, for a sufficient electrically conductive connection, any coating that may be present on the pipeline element must be removed. If a joint between two adjacent pipe ele- ments is to be bridged, the coating on the pipe ele- ments on both sides of the pipe joint must be removed. There are also two ground strap clamps required for such a joint. It must be opened for mounting each of these earthing band clamps and clamped with the aid of tools. The installation effort of the equipotential bonding conductor involves additional handling. Since an unintentional loosening of the clamping screw can not always be completely ruled out, a regular check for safe contacting is required. The effort described here is felt to be disadvantageous overall.
  • earthing clamps are known in which a multi-part clamp ring is placed around the pipe element and is fastened firmly to the pipe element by means of one or more tightening screws. In this system, too, several operations are necessary in order to bring the clamp to the pipe element on the one hand and to connect the equipotential bonding conductor to the ground pipe clamp on the other hand. Also with earthing clamps a regular check of the safe contacting of the pipe is necessary as well as a possible removal of a pipe coating before installation of the pipe clamp.
  • the invention was therefore an object of the invention to provide a grounding clamp, which overcomes the disadvantages listed above as much as possible. Furthermore, the invention COLg the task was based on specifying a piping system, which overcomes the above-mentioned disadvantages as much as possible. In any case, the invention has the object to provide an alternative grounding clamp, or an alternative piping system.
  • the invention solves the underlying task by specifying a grounding clip according to claim 1.
  • the invention proposes a grounding clip for metallic pipe elements, comprising an electrically conductive base body having a first end portion and a second end portion disposed opposite to the first end portion, the end portions being movable relative to each other against a restoring force, the grounding bracket being adapted to under Be overcome the restoring force to be attached to the pipe elements, so that the end portions receive and hold the pipe elements between them. Due to the relative mobility of the two end sections against each other against the restoring force, it is possible to fasten the grounding clip to a pipeline element without additional fastening elements, or at a connection point between several pipeline elements.
  • the base body is at least partially formed of an elastically deformable material.
  • the base body is partially or completely formed from an electrically conductive metal material, for example from one of the following materials: spring steel, copper, or a copper alloy, aluminum or an aluminum alloy.
  • the surface of the base body is preferably coated metallically, for example galvanically coated. Preferred metallic coatings are achieved, for example, by means of nickel plating, tin plating, silver plating or gold plating.
  • spring steel is understood to mean a steel alloy with a yield strength to tensile strength ratio greater than 85%.
  • the first end section has two clamping wings, which extend at least in sections in the direction of the second end section, and which are spaced from one another in such a way that they can receive a pipe connector between them in the mounted state.
  • the thus formed earthing clamp is thus adapted to a predetermined pipe connector. This makes it possible in a particularly simple manner to attach the grounding clamp at a junction between two pipe elements, which are already installed on a fire extinguishing system and coupled by the pipe connector without disassembly of the pipe connector must be made for making the connection.
  • the grounding clip can simultaneously ground the first and second pipeline element at the joint, further minimizing the cost of material for grounding a larger fire extinguishing system.
  • the base body and the end portions are integrally formed, particularly preferably from a metal sheet. A grounding clip designed in this way can be produced in large quantities while maintaining high efficiency, since it can be produced as a one-piece element by means of deformation from the basic body.
  • toothings are respectively formed on the clamping wings of the first end section on a side facing the second end section.
  • the toothing is preferably formed of the material of the main body, so that the tips of the toothing protrude from the base of the toothing in the direction of the other end portion.
  • any existing on the outside of the pipe coatings or insulations that surround the metallic material of the pipeline can be penetrated.
  • the height or depth of the toothing is preferably chosen so that the existing coating thickness on the pipe at least equal to or exceeds. If the earthing clamp is pretensioned, ie deflected against a restoring force, when it is placed on the pipeline, the restoring force additionally supports the penetration of any existing coating on the pipeline. In this way, via the teeth take place a contacting of the pipe, even if the outside of the pipe is not electrically conductive in itself. This speeds up the assembly process of the grounding on the one hand, while on the other hand makes it difficult to slip the grounding clamp.
  • the base body of the earthing clamp is adapted to extend in the attached state in the circumferential direction - relative to the passage axis of the respective pipe and / or the pipe connector - around a part of the pipe connector around.
  • the main body also serves as a mechanical shield for the pipe connector.
  • the second end portion is adapted to be supported on the pipe connector.
  • the second end portion preferably on the front side, has a recess which is adapted for positioning in contact with a clamping screw of the pipe connector acting in the circumferential direction. This makes it easier to position the earthing clamp on a correspondingly formed pipe connector and reliably prevents misalignment of the earthing clamp.
  • the second end portion is bent in the direction of the first end portion.
  • the second end section (like the first end section) has two clip wings extending in the direction of the first end section and thus spaced apart from one another are that they accommodate the pipe connector in the attached state between them.
  • the two end sections in the installed state can act on the left and right of the pipe connector directly to the pipes coupled by means of the pipe connector and reliably connect them to one another.
  • the electrical connection is independent of any possibly between pipe connector and pipe element attached insulating seal, which could limit the conductivity.
  • a toothing is formed on the clamping wings of the second end section on a side facing the first end section.
  • the toothing is preferably formed as described above with respect to the clip wings at the first end portion to provide reliable contacting and non-slip retention of the grounding clip to the tubing member (s) on both sides of the tubing member or any pipe connector.
  • the invention has been described above with reference to the grounding clip itself in a first aspect.
  • the invention further relates to a piping system, in particular a piping system of a fire extinguishing system.
  • the invention achieves its underlying object in such a piping system in that the piping system has a first pipeline element and a grounding clip electrically connected to the pipeline element, the grounding clip being formed according to one of the preferred embodiments described above, and an electrically conductive base body a first end portion and a second end portion disposed opposite to the first end portion, the end portions being movable relative to each other against a restoring force, the grounding clamp overcoming the restoring force on the first end portion Pipe element is mounted so that the end portions receive and hold the pipe element between them.
  • the invention is advantageously further developed in that the pipeline system additionally has a second pipeline element, wherein the first and second pipeline element are arranged adjacent to one another at a connection point and aligned at least in the region of the connection point in the direction of a longitudinal axis.
  • the piping system preferably further includes a pipe connector fluidly coupling the first pipe member to the second pipe member at the joint, and a grounding clip, wherein the grounding clip is formed according to any one of the above-described preferred embodiments, and an electrically conductive base body having a first end portion and a first end portion the first end portion opposite arranged second end portion, wherein the end portions are movable relative to a restoring force relative to each other, wherein the earthing clamp is applied overcoming the restoring force to the pipe elements so that the end portions receive and hold the pipe elements between them.
  • the first and second pipe element are thus electrically conductively connected to each other by means of the base body in the attached state.
  • the piping system is preferably further developed by coating at least one of the two pipe elements on its outer periphery, and the grounding clip has teeth on at least one end portion, the toothing penetrating the coating.
  • the invention further relates to a use of a clip as a grounding clip for the electrically conductive connection of two pipeline elements of a pipeline system, wherein the clip is formed according to one of the preferred embodiments described above.
  • the clip has an electrically conductive basic body with a first end section and a second end section arranged opposite to the first end section, wherein the end sections are designed to be movable relative to one another with respect to a restoring force, wherein the first and second end sections are arranged for this purpose. are directed to be mounted overcoming the restoring force on the pipe elements, so that the end portions on opposite sides of the pipe elements with the pipe elements come into contact and hold the pipes between them.
  • FIG. 1a shows a grounding clip according to a first embodiment in a schematic spatial view
  • FIG. 1 b shows a piping system according to a preferred embodiment with the earthing clamp according to FIG. 1 a in a schematic spatial view
  • FIG. 1 c shows an alternative view of the pipeline system according to FIG. 1 b
  • FIG. 2a shows a grounding clamp according to a second embodiment in a schematic spatial view
  • Figure 2b shows a piping system with the grounding clip according to Figure 2a in a schematic spatial view
  • FIG. 2c shows an alternative view of the pipeline system according to FIG. 2b.
  • FIGS. 1a to 1c show a first embodiment of a grounding clip 1.
  • the earthing clamp 1 has a main body 3, which is preferably formed from an elastically deformable material, for example from a spring steel.
  • the main body 3 has a first end section 5 and a second end section 7 formed opposite to the main body 3.
  • the first and second end sections 5, 7 have a distance Y from each other which is dimensioned such that a pipeline or a pipeline element 101, 103 (FIG. 1 b) can be arranged between the end section 5, 7.
  • the first and both end portions 5, 7 are spaced from each other such that for attaching the grounding clip 1 to a piping member 101, 103, an elastic deformation must be generated, which generates a restoring force against the elastic deformation.
  • the Base body 3 formed elastically deformable.
  • the end sections 5, 7 are moved away from one another when pushed onto a pipeline element 101, 103 and in this way are clipped onto the pipeline element 101, 103.
  • the first end section 5 preferably has two clip wings 9a, b, which are formed integrally on the base body 3 as sections bent over (by about 90 °).
  • the second end section 7 has an arcuately bent section (approximately 180 [deg.]) In the direction of the first end section 5, which is preferably also formed in one piece on the main body 3.
  • respective toothings 11 are formed on the clamping wings 9a, b which project from the respective clamping wing 9a, b in the direction of the second end section 7 and are adapted to scrape off any coating on a pipe element 101, 103 during clipping or to penetrate.
  • a recess 13 is formed at the end, which in turn is adapted to be brought into engagement with a clamping screw 107 of a pipe connector 105 to serve in this way as a positioning aid, see Figure 1 b, 1c.
  • the grounding clip 1 according to FIG. 1 a is configured to be optionally mounted on a single pipeline element 101 or to be attached to the pipe joint 105 at a joint between two pipeline elements 101, 103, the pipeline elements 101, 103 at least in the region of the joint aligned with each other in alignment along a longitudinal axis L.
  • FIG. 1 b shows the assembled state of the earthing clamp 1 according to FIG. 1 a.
  • the grounding clip 1 is located with the first and second end portion 5, 7 respectively in abutment with the pipe elements 101, 103 on both sides of the pipe connector 105 and is held by the overcome restoring force clamping the pipe elements 101, 103.
  • the clip wings 9a, 9b are spaced from each other by a distance X in the direction of the longitudinal axis L. The distance X is dimensioned so that the tube connector 105 can be received between the clamp wings 9a, b.
  • FIGS. 2 a to 2 c show a grounding clip V according to a second exemplary embodiment.
  • the operating principle of the earthing clamp V is similar to the functional principle of the earthing clamp 1 according to FIGS. 1a to 1c, for which reason the same reference numerals have been assigned with respect to identical or functionally identical elements. In order to avoid repetition, reference is also made to the above explanations concerning FIGS. 1a to 1c.
  • the grounding clip V has a base 3 in which the first end portion 5 is formed as in the grounding clip 1 according to the first embodiment.
  • the second end section 7 ' also has two clamping wings 15a, b. Between the two end portions 5, 7 ', in turn, a distance Y is defined, which is dimensioned so that a corresponding pipe or one or more pipe elements 101, 103 between the end portions 5, 7' can be accommodated, wherein the distance between the clamping wings 9a and 15a among each other, and 9b and 15b are each dimensioned to each other so that the grounding clip V is held in attached state.
  • the holding or clamping force is caused by an elastic deformation of the base body 3 and / or the end portions 5, 7 ', whereby a restoring force is generated, which counteracts the deformation.
  • the attachment and mode of action of the earthing clamp V take place as in the exemplary embodiment of FIGS. 1a to 1c.
  • the earthing clamp 1 is clipped onto the pipe elements 101, 103 via a pipe connector 105, which is facilitated by the fact that the clamp vanes 9a, b and 15a, b in the first and second end sections 5, 7 are spaced by a distance X in the direction of the longitudinal axis L. spaced apart, which is sufficiently dimensioned to receive the pipe connector 105 between them.
  • the teeth 11 provided on the clip wing 9a, b and 15a, b can be used If necessary, by a coating on the pipe elements 101, 103 extend therethrough to ensure a secure contact and a non-slip grip of the grounding clip V on the pipe elements 101, 103.
  • the grounding clip V unlike the grounding clip 1, has a substantially symmetrical construction. Also, the grounding clip V can be grounded by means of an indicated potential equalization line 109.
  • FIGS. 1a-c and 2a-c The essential differences between the exemplary embodiments of FIGS. 1a-c and 2a-c are that, in the exemplary embodiment of FIGS. 1a-c, the grounding clip 1 is adapted to be supported on the tube connector 105 by means of the second end section 7, while in the case of FIG Embodiment of Figures 2a - c, the grounding clip V is independent of the pipe connector 105 exclusively to the pipe elements 101, 103 holds.
  • the clip wings 9a, b and 15a, b in both exemplary embodiments are preferably designed such that they extend at least in sections, namely at an end facing away from the base body 3, to the respectively opposite end section, in order to loop around the pipeline elements 101, 103 in some areas in such a way that the earthing clamp 1, V can not slide off the pipe elements 101, 103 as a result of the restoring force, but is held reliably on the pipe elements 101, 103.
  • Both grounding clamps 1, 1 extend in the direction of the longitudinal axis L and transversely thereto with sufficient distances x, y around the pipe connector 105.
  • the specific geometry of the earthing clamps 1, V enables extremely economical production of the earthing clamps 1, V in large numbers.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)

Abstract

L'invention concerne une pince de mise à la terre (1, 1') pour éléments de tuyauterie métalliques. Selon l'invention, la pince de mise à la terre (1, 1') comporte un corps de base électriquement conducteur (3) qui présente une première partie d'extrémité (5) et une seconde partie d'extrémité (7, 7') qui est disposée en face de la première partie d'extrémité (5), dans laquelle les parties d'extrémité (5, 7') présentent une première partie d'extrémité (5) et une seconde partie d'extrémité (7, 7') qui est disposée en face de la première partie d'extrémité (5), les parties d'extrémité (5, 7') étant mobiles l'un par rapport à l'autre contre une force de rappel, et la chambre de mise à la terre (1, 1') étant adaptée pour être fixée aux éléments de tuyauterie tout en surmontant la force de rappel, de sorte que les extrémités (5, 7, 7') reçoivent et maintiennent les éléments (101, 103) entre eux.
PCT/EP2018/084231 2017-12-08 2018-12-10 Pince de mise a la terre pour éléments de tuyauterie metalliques, et système de tuyauterie auto WO2019110848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017129345.0A DE102017129345A1 (de) 2017-12-08 2017-12-08 Erdungsklammer für metallische Rohrleitungselemente, und Rohrleitungssystem mit selbiger
DE102017129345.0 2017-12-08

Publications (1)

Publication Number Publication Date
WO2019110848A1 true WO2019110848A1 (fr) 2019-06-13

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Application Number Title Priority Date Filing Date
PCT/EP2018/084231 WO2019110848A1 (fr) 2017-12-08 2018-12-10 Pince de mise a la terre pour éléments de tuyauterie metalliques, et système de tuyauterie auto

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Country Link
DE (1) DE102017129345A1 (fr)
WO (1) WO2019110848A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210324984A1 (en) * 2020-04-17 2021-10-21 Entegris, Inc. Electrostatic discharge mitigation device

Citations (4)

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Publication number Priority date Publication date Assignee Title
FR1415788A (fr) * 1964-09-18 1965-10-29 Assemblage étanche par collier pour tuyauteries de fluides
CH425373A (de) * 1964-02-26 1966-11-30 Buderus Eisenwerk Elektrische Überbrückvorrichtung an einer gummigedichteten Rohrverbindung
US4456321A (en) * 1982-04-19 1984-06-26 General Electric Company Two-piece, push-on type grounding clip
GB2176947A (en) * 1985-06-19 1987-01-07 Victaulic Plc Electrically conductive member for connection between two pipes

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GB9010095D0 (en) * 1990-05-04 1990-06-27 Haskins Herbert V Improvements relating to electrical connectors
US5350201A (en) * 1993-01-15 1994-09-27 Moeller Manufacturing Co., Inc. Separable connector external capture device
US5616036A (en) * 1995-10-27 1997-04-01 Thomas Polidori Grounding clamp
DE10204262A1 (de) * 2002-02-02 2003-08-07 Bauer Christian Gmbh & Co U-Profilförmige Federklammer für Flanschverbindungen
ES2351534T3 (es) * 2006-01-05 2011-02-07 Norma Germany Gmbh Sistema de conexión con racor tubular para unir piezas de paso de fluidos.
DE102007052935B4 (de) * 2007-11-02 2010-01-07 Gerdes Ohg Steckelement zum mechanischen Fixieren von Rohren an einem Gehäuse sowie zum Bereitstellen eines Anschlusses für die Kontaktierung eines Schutzleiters
US9383050B1 (en) * 2015-10-22 2016-07-05 Grand Hall Enterprise Co., Ltd. Quick removal plumbing fitting

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
CH425373A (de) * 1964-02-26 1966-11-30 Buderus Eisenwerk Elektrische Überbrückvorrichtung an einer gummigedichteten Rohrverbindung
FR1415788A (fr) * 1964-09-18 1965-10-29 Assemblage étanche par collier pour tuyauteries de fluides
US4456321A (en) * 1982-04-19 1984-06-26 General Electric Company Two-piece, push-on type grounding clip
GB2176947A (en) * 1985-06-19 1987-01-07 Victaulic Plc Electrically conductive member for connection between two pipes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210324984A1 (en) * 2020-04-17 2021-10-21 Entegris, Inc. Electrostatic discharge mitigation device

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