CN111262137A - Uninterrupted multifunctional grounding device for switch cabinet cable dismounting - Google Patents

Uninterrupted multifunctional grounding device for switch cabinet cable dismounting Download PDF

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Publication number
CN111262137A
CN111262137A CN202010183271.0A CN202010183271A CN111262137A CN 111262137 A CN111262137 A CN 111262137A CN 202010183271 A CN202010183271 A CN 202010183271A CN 111262137 A CN111262137 A CN 111262137A
Authority
CN
China
Prior art keywords
cable
nose
grounding
switch cabinet
shaped
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.)
Pending
Application number
CN202010183271.0A
Other languages
Chinese (zh)
Inventor
郭跃东
郭小娴
郭丽华
马晓娟
杨冰
李恒静
方欣
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.)
Nanyang Power Supply Co Of State Grid Henan Electric Power Co
Original Assignee
Nanyang Power Supply Co Of State Grid Henan Electric Power Co
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 Nanyang Power Supply Co Of State Grid Henan Electric Power Co filed Critical Nanyang Power Supply Co Of State Grid Henan Electric Power Co
Priority to CN202010183271.0A priority Critical patent/CN111262137A/en
Publication of CN111262137A publication Critical patent/CN111262137A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/16Earthing arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00Switchgear having carriage withdrawable for isolation
    • H02B11/28Earthing arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035Gas-insulated switchgear
    • H02B13/075Earthing arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear

Abstract

The invention provides a multifunctional grounding device for dismounting and mounting a switch cabinet cable, and belongs to the technical field of power tools. The utility model provides an incessant multi-functional earthing device of cubical switchboard cable dismouting, include with cable junction's cable lug and with the vertical water conservancy diversion row that the cable lug is connected, vertical water conservancy diversion arrange with set up U type water conservancy diversion between the cable lug and arrange, L type termination is connected to the cable lug. Through the implementation of the invention, the cable nose can still keep a reliable grounding state at the moment of separating from the vertical flow guide row, thus easily realizing the omnibearing grounding protection of the power supply side and the line side and thoroughly eliminating the protection dead angle and the threat to the personal safety of operating personnel.

Description

Uninterrupted multifunctional grounding device for switch cabinet cable dismounting
Technical Field
The invention belongs to the technical field of power tools, and particularly relates to a multifunctional grounding device for dismounting and mounting a switch cabinet cable without interruption.
Background
At present, medium and low voltage switch cabinets are widely applied to power systems, and feeder lines of the medium and low voltage switch cabinets are all cable outgoing lines. The connection of cable and the interior vertical water conservancy diversion row of cubical switchboard cabinet is accomplished through the cable nose, that is to say that the cable is earlier in the same place with the cable nose through mechanical crimping, then uses the bolt to link together cable nose and vertical water conservancy diversion row.
Referring to fig. 1, the conventional switch cabinet cable grounding device includes a cable nose connected to a cable, and a vertical guide bar connected to the cable nose, wherein the cable nose is connected to the vertical guide bar by a bolt, and the vertical guide bar is connected to a ground wire. Because the earth connection is hung on vertical water conservancy diversion row, need follow vertical water conservancy diversion row with the cable nose when maintainer carries out experimental maintenance to the cable and pulls down, when loosening the fixing bolt of cable nose and vertical water conservancy diversion row, the cable nose breaks away from with vertical water conservancy diversion row, and the cable has just lost the safety measure of ground connection this moment, because the cable itself belongs to capacitive equipment, under the combined action of many factors such as cable run is alternately, stridees over, the personal safety of maintainer can directly threaten by the induced electricity that produces.
The utility model discloses a utility model with publication number CN208423468U discloses a cubical switchboard is gone out quick earthing device of line cable head, including ground terminal, interim ground connection pincers, special ground connection pincers and insulating boot, ground terminal comprises screw thread head, terminal seat and first wiring copper sheet, wherein, the screw thread head install in the one end of terminal seat, first slot is seted up to the other end of terminal seat, this first slot with first wiring copper sheet phase-match, first wiring copper sheet cartridge in this first slot. This cubical switchboard goes out quick earthing device of line cable head adopts the naked copper stranded conductor of 25mm and both ends configuration to be greater than 100A's line to inlay and makes the earth connection, and the cubical switchboard goes out quick one end ground connection with this device after the line cable head demolishs, and other end pincers carry out abundant discharge to the cable head in the copper lug department of cable head, through insulating boot 4 with the all-round parcel of cable head, avoid the operation personnel to touch the cable head and arouse the electric shock. Adopt insulating boot to cover the cable head in order to avoid the operation personnel to electrocute among this scheme, the method is crude, and the reliability is not high moreover.
The utility model with publication number CN 208368951U discloses a switch cabinet quick grounding device, which comprises an L-shaped switching copper bar, wherein a first through hole for connecting with a copper bar of a outgoing line hanging cable in the switch cabinet is arranged on the vertical surface of the switching copper bar, and a second through hole and a third through hole which are respectively used for fixedly connecting with a first copper casting and a second copper casting are arranged on the horizontal surface of the switching copper bar; the first copper casting is of an inverted L shape, the horizontal plane of the first copper casting is arranged below the horizontal plane of the switching copper bar, a through hole matched with the second through hole is formed in the first copper casting, and a fourth through hole is formed in the vertical plane of the first copper casting; the second copper casting is the same as the first copper casting in shape and size, and is arranged opposite to the first copper casting; the copper bar lead screw is fixed between the first copper casting and the second copper casting through the fourth through hole. This earthing device can come the customization according to the different specifications of copper bar in the cubical switchboard, and whether adopt spiral earthing rod or the earthing rod of two tongues pressing mode during the maintenance can both hang the earth connection very easily. The grounding device mainly solves the grounding problem of the switch cabinet, the problem that the cable is separated from the grounding device when being maintained still exists, and the safety is to be enhanced.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide an uninterruptible multifunctional grounding device for dismounting a cable of a switch cabinet, so that the cable of the switch cabinet can be grounded safely when being dismounted, and the safety of the dismounting operation of the cable of the switch cabinet is improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides an incessant multi-functional earthing device of cubical switchboard cable dismouting, include with cable junction's cable lug and with the vertical water conservancy diversion row that the cable lug is connected, vertical water conservancy diversion arrange with set up U type water conservancy diversion between the cable lug and arrange, L type termination is connected to the cable lug.
Preferably, two sides of the U-shaped flow guide row are respectively in through connection with the vertical flow guide row and the cable nose through bolts.
Preferably, the short side of the L-shaped wiring device is provided with a fixing hole, and the bolt extends out of the fixing hole and is fastened and connected by a nut.
Preferably, a long side of the L-shaped wiring device is provided with a connecting hole, and the connecting hole is connected with a wire nose of the grounding wire through a bolt.
Preferably, the long side of the L-shaped wiring device is provided with an L-shaped sliding connection groove, and the L-shaped sliding connection groove is connected with a wire nose of the grounding wire through a butterfly nut.
As described in the background of the invention, cable feeders are adopted in medium and low voltage switch cabinets produced at home and abroad at present, the fatal serious potential safety hazard exists, and no effective technical scheme is provided, so that the problem that the grounding protection of the switch cabinet is only considered when the grounding design of the medium and low voltage switch cabinet is carried out, and the cable maintenance is not taken into account, so that the grounding protection of the cable cannot be realized only by a grounding wire arranged on a vertical flow guide row at the moment of detaching a connecting bolt between the vertical flow guide row and a cable nose, and the personal safety of operating personnel is directly influenced due to the existence of a protection dead angle. The inventor carefully discovers the problem in a plurality of practical operations, and has the technical idea of the invention in order to fundamentally eliminate the serious potential safety hazard. The implementation of the technical scheme of the invention can fundamentally solve the potential safety hazard existing when the cable is disassembled and assembled in the medium and low voltage switch cabinet, and effectively protect the personal safety of workers in the cable maintenance process.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a multifunctional grounding device for dismounting a cable of a switch cabinet, which is based on the problem of low safety caused by the fact that the cable is separated from a vertical guide bar in the conventional grounding device for the switch cabinet when the cable is dismounted and the grounding device is not grounded. According to the grounding device, the U-shaped guide row is arranged between the vertical guide row and the cable nose, and the cable nose is connected with the L-shaped wiring device, wherein two sides of the U-shaped guide row are in surface-to-surface contact with the vertical guide row and the cable nose, and current flows through the contact surface to form a current circulation path, so that the contact reliability is ensured; in addition, when the connection of the vertical flow guide row and the cable nose is disassembled, the vertical flow guide row, the cable nose and the grounding device can be separated from each other, and the grounding protection effect on a cable cannot be achieved.
The long edge of the L-shaped wiring device is provided with the connecting hole and the L-shaped sliding connecting groove, and the connecting hole and the L-shaped sliding connecting groove are both connected with the wire nose of the grounding wire, so that different grounding wires can be conveniently installed on site for use.
Through the implementation of the invention, the cable nose can still keep a reliable grounding state at the moment of separating from the vertical flow guide row, thus easily realizing the omnibearing grounding protection of the power supply side and the line side and thoroughly eliminating the protection dead angle and the threat to the personal safety of operating personnel.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1: the structure schematic diagram of the existing switch cabinet cable grounding device;
FIG. 2: the invention discloses a structural schematic diagram of a multifunctional uninterrupted grounding device for dismounting a switch cabinet cable;
FIG. 3: FIG. 1 is a cross-sectional view of the present invention;
FIG. 4: the invention discloses a structural schematic diagram of a U-shaped guide row (A: a front view, B: a left view and C: a top view);
FIG. 5: the structure schematic diagram of the L-shaped wiring device of the invention (D: front view; E: left view; F: top view);
the cable comprises a 1-cable, a 2-cable nose, a 3-vertical flow guide row, a 4-U-shaped flow guide row, a 5-L-shaped wiring device, a 6-bolt, a 7-through hole, an 8-fixing hole, a 9-connecting hole and a 10-L-shaped sliding connecting groove.
Detailed Description
In order to better understand the present invention, the following examples are further provided to clearly illustrate the contents of the present invention, but the contents of the present invention are not limited to the following examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
Referring to fig. 2-3, a multifunctional grounding device for dismounting and mounting a switch cabinet cable without interruption comprises a cable nose 2 connected with a cable 1 and a vertical diversion row 3 connected with the cable nose 2, wherein a U-shaped diversion row 4 is arranged between the vertical diversion row 3 and the cable nose 2, and the cable nose 2 is connected with an L-shaped wiring device 5.
Wherein, the cable nose is also called as a cable nose, a wire nose or a cable connecting nose, is made of copper or aluminum, and is plated with silver on the surface; the cable is connected with the switch cabinet; cable lugs are conventional in the art.
The vertical guide row involved in the invention is in an 'I' shape under the view angle of fig. 2, and the side view is in a plane shape; the copper bar or the aluminum bar is fixedly connected with the switch cabinet through bolts; the cable guide device is used for guiding current when the switch cabinet normally runs, and can be used for installing a grounding wire when the switch cabinet or a cable is in power failure and overhauled.
Referring to fig. 4, the front view of the U-shaped guide row 4 is U-shaped, and the left view and the right view are both planar, so as to form a surface connection with the vertical guide row and the cable nose respectively; the two side surfaces are integrally connected through the plane of the bottom to form a U-shaped structure; and both side surfaces have through holes 7 through which the bolts 6 pass.
In one embodiment of the invention, two sides of the U-shaped guide row 4 are respectively connected with the vertical guide row 3 and the cable nose 2 through bolts 6. Therefore, the two side surfaces of the U-shaped guide row are in surface-to-surface contact with the vertical guide row and the cable nose respectively, so that when current flows through the contact surface, a current circulation path can be formed, and the contact reliability is ensured.
In a preferred embodiment of the present invention, the U-shaped guide bar 4 is formed by processing a copper bar or an aluminum bar with a width of 60mm × 6mm (width × thickness), and is mainly used for bearing a current flowing from the copper bar or the aluminum bar to the current path of the cable lug 2, so as to ensure that the current-carrying capacity meets the requirement and avoid the heat of the current-carrying conductor.
Referring to fig. 5, the L-shaped wiring device 5 is L-shaped, the short side of the L-shaped wiring device is provided with a fixing hole 8, the long side of the L-shaped wiring device is provided with a connecting hole 9 and an L-shaped sliding connecting groove 10, in an embodiment of the present invention, the short side of the L-shaped wiring device 5 is provided with a fixing hole 8, and the bolt 6 extends out of the fixing hole 8 and is fastened and connected by a nut. The fixing hole is used for connecting the L-shaped wiring device with the U-shaped flow guide row for a bolt to pass through, so that the right side face (see figure 2) of the U-shaped flow guide row is connected with the side face where the short edge of the L-shaped flow guide device is located through the bolt. Therefore, the two side faces of the vertical flow guide row and the U-shaped flow guide row and the side face where the short edge of the L-shaped connecting device is located can be fixedly connected through the bolt, the bolt penetrates through the bolt from right to left as shown in fig. 2-3, the right end of the bolt is fastened by the nut, when the cable is disassembled, the bolt slowly screws out from the right side, when the vertical flow guide row is separated from the U-shaped flow guide row, the cable nose, the U-shaped flow guide row and the L-shaped wiring device are still integrated, meanwhile, the L-shaped wiring device is connected with a grounding wire, and therefore grounding protection of the cable is guaranteed.
In one embodiment of the invention, the long side of the L-shaped wiring device 5 is provided with a connecting hole 9, and the connecting hole 9 is connected with a wire nose of a grounding wire through a bolt.
In another embodiment of the present invention, an L-shaped sliding connection slot 10 is provided on the long side of the L-shaped wiring device 5, and the L-shaped sliding connection slot 10 is connected with the lug of the grounding wire through a wing nut.
According to the invention, two wiring structures are simultaneously arranged on the long side of the L-shaped wiring device 5, so that different grounding wires can be conveniently installed.
In a preferred embodiment of the present invention, the L-shaped wiring device 5 of the present invention is formed by processing a copper bar with a width of 60mm × 6mm (width × thickness) into an "L" shape. The long side of the grounding wire is 100mm long, a connecting hole 9 with the diameter of 14mm is processed on the horizontal plane of the long side, and the wire nose of the grounding wire is fixed with the connecting hole 9 through a bolt and then grounded; and meanwhile, an L-shaped sliding connecting groove 10 with the width of 14mm is processed on the horizontal plane of the long edge, and the groove can be connected with a wire nose of a grounding wire and then grounded by using a butterfly nut. The short side of the device is 80mm long, and a round fixing hole 8 with the diameter of 14mm is processed on the horizontal plane of the short side and used for installing and fixing the device.
Obviously, through the above-mentioned improvement back, vertical water conservancy diversion is arranged 3 and L type termination 5 and is all connected with the earth connection, when testing the maintenance to cable 1, when dismantling vertical water conservancy diversion and arrange 3 and cable nose 2 be connected, U type water conservancy diversion is arranged 4, cable nose 2 and earthing device three and is still a whole to play the earth protection effect to cable 1.
In order to ensure the reliable grounding effect of the grounding device, after the grounding device is machined, a 30-degree chamfering process is adopted for the edge of the grounding device, a silver plating process is adopted for the surface of the grounding device, and the thickness of a silver plating layer is not less than 8 mu m. If the switch cabinet is not plated with silver, the outer surface of the copper diversion row can be corroded when air in the switch cabinet is wet, and the diversion effect is influenced.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. The utility model provides an incessant multi-functional earthing device of cubical switchboard cable dismouting, include with cable junction's cable wire nose and with the vertical water conservancy diversion row that cable wire nose is connected, its characterized in that: the vertical diversion row and the cable nose are provided with a U-shaped diversion row, and the cable nose is connected with an L-shaped wiring device.
2. The multifunctional grounding device for the switch cabinet cable dismounting and mounting in uninterrupted mode according to claim 1, wherein: and the two sides of the U-shaped flow guide row are respectively communicated with the vertical flow guide row and the cable nose through bolts.
3. The multifunctional grounding device for the switch cabinet cable dismounting and mounting in uninterrupted mode according to claim 1, wherein: the short edge of the L-shaped wiring device is provided with a fixing hole, and the bolt extends out of the fixing hole and is fastened and connected by a nut.
4. The multifunctional grounding device for the switch cabinet cable dismounting and mounting in uninterrupted mode according to claim 1, wherein: the long edge of the L-shaped wiring device is provided with a connecting hole, and the connecting hole is connected with a wire nose of the grounding wire through a bolt.
5. The multifunctional grounding device for the switch cabinet cable dismounting and mounting in uninterrupted mode according to claim 1, wherein: l type termination's long limit sets up L type sliding connection groove, L type sliding connection groove passes through butterfly nut and is connected with the line nose of earth connection.
CN202010183271.0A 2020-03-16 2020-03-16 Uninterrupted multifunctional grounding device for switch cabinet cable dismounting Pending CN111262137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010183271.0A CN111262137A (en) 2020-03-16 2020-03-16 Uninterrupted multifunctional grounding device for switch cabinet cable dismounting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010183271.0A CN111262137A (en) 2020-03-16 2020-03-16 Uninterrupted multifunctional grounding device for switch cabinet cable dismounting

Publications (1)

Publication Number Publication Date
CN111262137A true CN111262137A (en) 2020-06-09

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Application Number Title Priority Date Filing Date
CN202010183271.0A Pending CN111262137A (en) 2020-03-16 2020-03-16 Uninterrupted multifunctional grounding device for switch cabinet cable dismounting

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CN (1) CN111262137A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101741030A (en) * 2008-11-21 2010-06-16 江苏省电力公司扬州供电公司 Cable end grounding wire device
CN102315521A (en) * 2010-07-06 2012-01-11 中国石油天然气集团公司 Pipeline station instrument equipment grounding device
CN202474500U (en) * 2012-03-21 2012-10-03 山西省电力公司太原供电分公司 Constant-connection type cable grounding line in overhaul period
CN203013969U (en) * 2012-12-21 2013-06-19 黄石供电公司变电运行中心 U-shape bayonet spiral compaction ground clamp
CN103280637A (en) * 2013-04-14 2013-09-04 国家电网公司 Preload earth wire terminal wire-inlet cable grounding method
CN206280666U (en) * 2016-11-17 2017-06-27 常州贵鸿电气有限公司 Metal hose earth protective device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101741030A (en) * 2008-11-21 2010-06-16 江苏省电力公司扬州供电公司 Cable end grounding wire device
CN102315521A (en) * 2010-07-06 2012-01-11 中国石油天然气集团公司 Pipeline station instrument equipment grounding device
CN202474500U (en) * 2012-03-21 2012-10-03 山西省电力公司太原供电分公司 Constant-connection type cable grounding line in overhaul period
CN203013969U (en) * 2012-12-21 2013-06-19 黄石供电公司变电运行中心 U-shape bayonet spiral compaction ground clamp
CN103280637A (en) * 2013-04-14 2013-09-04 国家电网公司 Preload earth wire terminal wire-inlet cable grounding method
CN206280666U (en) * 2016-11-17 2017-06-27 常州贵鸿电气有限公司 Metal hose earth protective device

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