EP0404691A2 - Erdungspfosten - Google Patents

Erdungspfosten Download PDF

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Publication number
EP0404691A2
EP0404691A2 EP90401780A EP90401780A EP0404691A2 EP 0404691 A2 EP0404691 A2 EP 0404691A2 EP 90401780 A EP90401780 A EP 90401780A EP 90401780 A EP90401780 A EP 90401780A EP 0404691 A2 EP0404691 A2 EP 0404691A2
Authority
EP
European Patent Office
Prior art keywords
stake
segment
cylindrical
cavity
head
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.)
Granted
Application number
EP90401780A
Other languages
English (en)
French (fr)
Other versions
EP0404691B1 (de
EP0404691A3 (de
Inventor
Michel Vassallucci
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.)
DUCLOS ENVIRONNEMENT
Original Assignee
DUCLOS ENVIRONNEMENT
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 DUCLOS ENVIRONNEMENT filed Critical DUCLOS ENVIRONNEMENT
Priority to AT90401780T priority Critical patent/ATE99080T1/de
Publication of EP0404691A2 publication Critical patent/EP0404691A2/de
Publication of EP0404691A3 publication Critical patent/EP0404691A3/de
Application granted granted Critical
Publication of EP0404691B1 publication Critical patent/EP0404691B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin

Definitions

  • the present invention relates generally to the field of grounding electrodes. We know that such electrodes must simultaneously assume several functions, in particular: - drain fault and lightning currents into the ground; - at all times to maintain the security of people and property and, - maintain a reference potential.
  • grounding electrodes by driving earth stakes into the ground.
  • This form of grounding electrode is simple, efficient and quick to implement by manual driving with a mass or by mechanical driving with a pneumatic, electric or gas hammer.
  • Such a grounding method requires knowledge of the resistivity and hardness of the ground at depth. Based on these data and the earth resistance sought, it is possible to determine approximately the length of the earth stake (s) to be installed. For obvious practical reasons, when the length of a stake exceeds a value of the order of 1 to 2 m, the stake is made up as it is driven into the ground by abutting stake segments by screwing, latching, sleeving or fitting, only the first stake segment being provided with means for ensuring penetration into the ground.
  • the quality of an earth stake depends largely on the quality of the junctions of its constituent elements with, in addition to the qualities of mechanical resistance and electrical contact essential: good resistance to corrosion.
  • connection of an earth rod to an electrical conductor which connects several earth rods together to form an extended earth socket, or which connects, via an earth rod , the earth connection at the main measurement terminal of the installation to be protected guarantees better security if it cannot be dismantled: in fact, the earth connection and the electrical conductor which connects it to the main measurement terminal form a whole and it is not necessary that at any time, occasionally, by simply dismantling a connection terminal, its configuration can be changed.
  • the present invention has set itself the objective of producing an improved ground stake which meets, in all cases of use, the quality and safety requirements mentioned above.
  • the subject of the invention is an earth stake, characterized in that it consists of: one or more rod segments, the ends of which have a shape allowing said segments to force-fit one inside the other, according to a longitudinal centering, as it is driven into the ground until the desired stake length is obtained and a head coming to force-fit longitudinally on the last segment, this head being designed so as to ensure the connection of an electrical conductor to the stake, and it includes for this purpose an orifice in which said conductor is blocked.
  • the first rod segment of the earth stake is provided before its insertion into the ground with a penetration point.
  • the earth stake comprises one or more axial reinforcement sleeves which are placed by sleeving respectively between two rod segments of said stake, while preserving the push fit of the rod segments between them.
  • the earth stake according to the present invention can be put in place for example using a driving fork which can be used alone according to the driving equipment used to ensure the driving of the stake, but which is preferably covered with a driving bolt to which it can be secured by means of an elastic pin, placed perpendicular to the axis of said bolt, this bolt / bolt assembly constituting a head of threshing.
  • a driving fork which can be used alone according to the driving equipment used to ensure the driving of the stake, but which is preferably covered with a driving bolt to which it can be secured by means of an elastic pin, placed perpendicular to the axis of said bolt, this bolt / bolt assembly constituting a head of threshing.
  • a grounding stake according to the present invention is produced by fitting one into the other according to a longitudinal centering of one or more stake segments 1, 1 ′, this interlocking being carried out as it is driven into the ground until the desired stake length is obtained.
  • Each of the stake segments 1, 1 ′ is preferably monometallic, it has a cylindrical shape and it has at one of its ends a shoulder connected by a rounded 2 to a compound finger a cylindrical body 3 which is extended by a frustoconical body 4 ending in a point 5.
  • the other end of each stake segment is provided with a cylindrical cavity 6 having an internal chamfer 7 and a conical bottom 8 .
  • the stake according to the invention further comprises a head called "self-connecting" head which is designed so as to allow the connection of an electrical conductor to said stake.
  • this self-connecting head 9 has a frustoconical cavity 10 opening onto a cylindrical cavity 11 having a crown projection 12 which makes it possible to mechanically wedge a cylindrical pellet 15 provided with a chamfer 16 whose upper surface is located in a plane tangent to an orifice 13 which is provided with the self-connecting head 9 and which allows the passage of the electrical conductor to be trapped mechanically in this head perpendicular to the stake.
  • the self-connecting head also comprises an external chamfer 14.
  • one or more sleeves for axially reinforcing the earth stake can be provided.
  • a sleeve designated hereinafter "axial reinforcement sleeve” is placed by sleeving between two rod segments 1, 1 ′ while preserving the forced fit of the rod segments of said stake between them.
  • an axial reinforcement sleeve 18 is symmetrical with respect to a ring 21 projecting inside a cylindrical cavity 20 extended by a frustoconical cavity 19 at each end of the axial reinforcement sleeve 18.
  • the outer cylindrical part of the sleeve is extended at each end by a frustoconical part 22.
  • the stake segment 1 ′ is provided with a penetration point 23 allowing it to be driven into the ground.
  • This penetration point 23 is provided with a cavity 6 which is identical to the cavity designated by the same reference and with which the stake segments are provided.
  • This tip of penetration 23 ends with a conical part 24 ensuring penetration into the ground.
  • the earth stake described above can be put in place by driving into the ground using a threshing head, an exemplary embodiment of which has been shown in FIG. 3.
  • the threshing head comprises two essential elements: a drive-in yoke 31 and a drive chuck 25.
  • the driving fork 31 consists of a cylindrical body 33 provided with a chamfer 35 and a shoulder connected by a rounding 34 to a cylindrical finger 32 terminated by a slightly pointed end 36.
  • the driving button 25 comprises a cylindrical cavity 28 connected by a chamfer 29 to a second cylindrical cavity 27 of smaller diameter.
  • This bolt further comprises a longitudinal notch 30 on each of its sides, an outer chamfer 26 and an orifice 37 intended to receive an elastic pin (not shown in the drawing).
  • This elastic pin placed perpendicularly to the axis of the bolt 25 has the function of securing said bolt and the driving fork 31 so as to constitute the threshing head according to the invention.
  • the first stake segment 1 ⁇ is driven into the ground using a tool jacking which transmits shocks via the threshing head according to the invention, described above with reference to FIG. 3.
  • This head constituted by the assembly of the yoke 31 and the chuck 25 is dimensioned such that the finger of the driving fork 31 can penetrate into the cavity 6 of the stake segment and that only the conical end 36 of this finger is in longitudinal contact with the bottom 8 of the cavity 6 during driving.
  • the diameter of the cavity 27 must be slightly greater than the diameter of the stake segment such as 1, 1 ′ or 1 ⁇ and of the cylindrical body 33 in order to ensure optimal guidance of the assembly. This arrangement avoids any deformation of the female end of the stake segment during driving.
  • the possible withdrawal of the pin placed in the orifice 37 makes it possible to replace the driving fork 31 which generally wears out faster than the driving jack 25.
  • first stake segment 1 ⁇ driven into the ground, we butt by tight fitting cylinder against cylinder as shown in the drawing a second stake segment such as 1 ′, using as before the threshing head and a driving tool (A figure 2).
  • the frustoconical part 4 of the male end of the stake segment 1 ′ serves as longitudinal guide so that the adjustment can occur in good conditions during driving.
  • This male end of the stake segment is dimensioned so that it is the shoulder which fully transmits the driving impact from one stake segment to the other when the stake is driven into the ground.
  • an axial reinforcement of the earth stake thus produced by the abutment of segments 1, 1 ′ and 1 ⁇ in particular during sinking in hard ground.
  • an axial reinforcement sleeve such as 18 (part B of FIG. 2) which has been described above with reference to FIG. 1.
  • the connection between the two stake segments such as 1, 1 ′ and the sleeve 18 is a sliding adjustment as seen in B in FIG. 2.
  • this sleeve constituted by the crown 21 located at mid-height of the sleeve makes it possible to prevent the latter from sliding off the along the stake while maintaining a tight fit, as described previously, between the male and female ends of two consecutive stake segments.
  • the frustoconical parts 19 provided at each end of the cylindrical cavities of the sleeve 18 make it possible to reduce the possible resistance to the penetration of the stake into the ground at the level of the sleeves.
  • the tight fit between the self-connecting head 9 and the stake segment such as 1 produced here cylinder against cylinder can be obtained using any other form without departing from the scope of the present invention.
  • this tight fit can be obtained by direct threshing on the self-connecting head or, preferably by using the threshing head according to the invention illustrated in FIG. 3.
  • the dimension of the cavity 28 and the chamfer 29 which is provided with the latter allow good positioning and good transmission of threshing shocks on the self-connecting head 9, without damaging the electrical conductor placed perpendicular to the axis of the stake thanks to the notches 30.
  • the stake segment 1 pushes the pellet 15 kept integral with the rest of the self-connecting head 9 by the crown-shaped projection 12 of very small size, which is then crushed by the passage of the stake segment until mechanically wedging the electrical conductor 17 as shown in C in FIG. 2.
  • the chamfer 16 of the pad 15 makes it possible to avoid any possible initiation of shearing of the conductor 17.

Landscapes

  • Manufacturing Of Electrical Connectors (AREA)
  • Non-Reversible Transmitting Devices (AREA)
  • Waveguide Aerials (AREA)
  • Hydrogenated Pyridines (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Catching Or Destruction (AREA)
  • Earth Drilling (AREA)
  • Piles And Underground Anchors (AREA)
EP90401780A 1989-06-23 1990-06-22 Erdungspfosten Expired - Lifetime EP0404691B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90401780T ATE99080T1 (de) 1989-06-23 1990-06-22 Erdungspfosten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908405 1989-06-23
FR8908405A FR2648959B1 (fr) 1989-06-23 1989-06-23 Piquet de prise de terre

Publications (3)

Publication Number Publication Date
EP0404691A2 true EP0404691A2 (de) 1990-12-27
EP0404691A3 EP0404691A3 (de) 1991-04-10
EP0404691B1 EP0404691B1 (de) 1993-12-22

Family

ID=9383071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401780A Expired - Lifetime EP0404691B1 (de) 1989-06-23 1990-06-22 Erdungspfosten

Country Status (4)

Country Link
EP (1) EP0404691B1 (de)
AT (1) ATE99080T1 (de)
DE (1) DE69005371D1 (de)
FR (1) FR2648959B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674068A1 (fr) * 1991-03-11 1992-09-18 Bertrand Dominique Prise de terre a foncage direct.
GB2256981A (en) * 1991-06-21 1992-12-23 Preformed Line Products Co Connections to lightning conductor earth rods
FR2691582A1 (fr) * 1992-05-22 1993-11-26 Electricite De France Connecteur de raccordement d'un câble de liaison de prise de terre et son procédé de montage.
CN104202903A (zh) * 2014-09-10 2014-12-10 西北核技术研究所 平面金属薄膜负载装置
CN110690589A (zh) * 2019-09-12 2020-01-14 广西电网有限责任公司电力科学研究院 一种可快速起拔的接地桩
CN110937542A (zh) * 2019-12-17 2020-03-31 中国人民解放军陆军工程大学 一种能够人工作业的拼装式桩柱
CN117937125A (zh) * 2024-03-21 2024-04-26 济南广鑫电力工程设计有限公司 一种电力设计线路施工用稳定型电力接地桩
US12080939B2 (en) 2021-01-24 2024-09-03 M Towers LLC Manufactured utility apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1197258A (fr) * 1958-06-13 1959-11-30 Procédé et dispositif pour l'exécution de prises de terre rectilignes
GB1218781A (en) * 1968-06-06 1971-01-13 Australian Insulator Ironworks Earthing electrode
US4156793A (en) * 1977-06-27 1979-05-29 Carlson Fred B Ground rod assembly
FR2397137A7 (fr) * 1977-07-06 1979-02-02 Graipin Raymond Prise de terre a foncage direct

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674068A1 (fr) * 1991-03-11 1992-09-18 Bertrand Dominique Prise de terre a foncage direct.
GB2256981A (en) * 1991-06-21 1992-12-23 Preformed Line Products Co Connections to lightning conductor earth rods
FR2691582A1 (fr) * 1992-05-22 1993-11-26 Electricite De France Connecteur de raccordement d'un câble de liaison de prise de terre et son procédé de montage.
CN104202903A (zh) * 2014-09-10 2014-12-10 西北核技术研究所 平面金属薄膜负载装置
CN110690589A (zh) * 2019-09-12 2020-01-14 广西电网有限责任公司电力科学研究院 一种可快速起拔的接地桩
CN110937542A (zh) * 2019-12-17 2020-03-31 中国人民解放军陆军工程大学 一种能够人工作业的拼装式桩柱
US12080939B2 (en) 2021-01-24 2024-09-03 M Towers LLC Manufactured utility apparatus
CN117937125A (zh) * 2024-03-21 2024-04-26 济南广鑫电力工程设计有限公司 一种电力设计线路施工用稳定型电力接地桩

Also Published As

Publication number Publication date
FR2648959A1 (fr) 1990-12-28
EP0404691B1 (de) 1993-12-22
EP0404691A3 (de) 1991-04-10
ATE99080T1 (de) 1994-01-15
FR2648959B1 (fr) 1995-03-24
DE69005371D1 (de) 1994-02-03

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