CN206388875U - Cable grounding device and power cable system - Google Patents
Cable grounding device and power cable system Download PDFInfo
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- CN206388875U CN206388875U CN201621102103.XU CN201621102103U CN206388875U CN 206388875 U CN206388875 U CN 206388875U CN 201621102103 U CN201621102103 U CN 201621102103U CN 206388875 U CN206388875 U CN 206388875U
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Abstract
The utility model is related to cable grounding device and power cable system.According to one side of the present utility model, there is provided a kind of cable grounding device.The cable grounding device includes：Grounded parts, the protective metal shell of cable to be grounded axially is docked to the grounded parts；And electrical connecting member, the electrical connecting member include the first end electrically connected with the grounded parts and the second end removably electrically connected with the protective metal shell.According to the utility model, the reliable electric and mechanical connection of the ground connection structure of cable grounding device can be ensured while the welding operation of erecting bed is avoided.
Description
Technical field
This disclosure relates to power cable field, more particularly, to cable grounding device and including cable grounding device
Power cable system.
Background technology
In power cable (such as high voltage power cable), corrugated aluminium or lead sheath metal screen layer are generally used.Mesh
Before, the earthing mode of electrical cable aluminium sheath mainly passes through cable termination or cable intermediate joint product (i.e. so-called cable accessory)
Mode that grounded parts is mutually welded with aluminium sheath is realized.(for example used in welding process, it is necessary to be heated to aluminium sheath
Naked light), often the time is longer for heating process, temperature is higher (such as up to more than 300 degree).If heating-up temperature and heat time are not
It can control well, it will the insulating barrier of conductive layer or cable to cable causes damage, so that the safety to cable system is transported
Row brings hidden danger.Accordingly, it would be desirable to soldering is carried out by the welding personnel of specialty, will which increase the technology to installation personnel
Ask.
In this respect, as shown in Fig. 1 (Fig. 1 is the sectional side elevation for showing the cable grounding device according to correlation technique), in root
According in the cable grounding device 10' of correlation technique, by around whole circumferential weld part SP by the protective metal shell 25 of cable 20
It is electrically connected to cable grounding device (such as copper courage or tail pipe) 10' grounded parts 600.
Thus, in the art, exist to the demand of welding processing mode so as to avoided while being grounded because
Field erected welding process and to cable cause damage.
Here, it is noted that the technology contents provided in this part are intended to contribute to those skilled in the art couple
The understanding of the disclosure, and not necessarily constitute prior art.
Utility model content
Total summary of the disclosure is provided in this part, rather than disclosure complete scope or all features of the disclosure is complete
Face is disclosed.
One purpose of the disclosure is to provide a kind of new cable grounding device in erecting bed without welding.
The another object of the disclosure is to provide a kind of can improve ground connection while the welding operation of erecting bed is avoided
Electric and mechanical connection the cable grounding device of attachment structure.
The another object of the disclosure is to provide a kind of can improve ground connection while the welding operation of erecting bed is avoided
The cable grounding device of the waterproof seal of attachment structure.
The another object of the disclosure, which is to provide, a kind of can facilitate execute-in-place and reduction to the technical requirements of installation personnel
Cable grounding device.
Other purposes of the disclosure, which are that offer is a kind of, includes the power cable system of above-mentioned cable grounding device.
One or more of to achieve these goals, according to an aspect of this disclosure, there is provided a kind of cable grounding
Device.The cable grounding device includes：Grounded parts, the protective metal shell of cable to be grounded axially is docked to the grounding parts
Part；And electrical connecting member, the electrical connecting member include the first end that is electrically connected with the grounded parts and with it is described
The second end that protective metal shell is removably electrically connected.
Contact to strengthen leading for ground connection electric conductivity in above-mentioned cable grounding device, in addition to the electrical connecting member
Electric components.
In above-mentioned cable grounding device, the conductive member includes being arranged in the first end and the grounded parts
Between conductive member and/or the conductive member that is arranged between the second end and the protective metal shell.
In above-mentioned cable grounding device：The first end includes the first kink, and first kink is toward back bending
Roll over and overlap on the body of the first end, and/or, the second end includes the second kink, described the
Two kinks back bend and overlapped on the body of the second end.
In above-mentioned cable grounding device, the conductive member includes the body and first for being arranged in the first end
Conductive member between kink and/or the conductive structure being arranged between the body of the second end and the second kink
Part.
In above-mentioned cable grounding device, in addition to suitable for the electrical connecting member is fastened into the tight of the grounded parts
Firmware, and/or, in addition to suitable for the electrical connecting member to be fastened to the fastener of the protective metal shell.
In above-mentioned cable grounding device, in addition to suitable for fastening the fastening of the electrical connecting member and the conductive member
Part, wherein, the fastener be positioned at at the axially opposing position answered of the conductive member.
In above-mentioned cable grounding device, the fastener is clip.
In above-mentioned cable grounding device, the conductive member is made up of flaky material, and the conductive member is interior
Surface and at least one surface structure in outer surface are into concaveconvex structure.
In above-mentioned cable grounding device, the concaveconvex structure is configured with sharp projection.
In above-mentioned cable grounding device, the conductive member is in complete or partial annular.
In above-mentioned cable grounding device, the conductive member is silver-plated beryllium-bronze conductive member.
In above-mentioned cable grounding device, the electrical connecting member is that the metal extended along the axial direction of the cable is compiled
Ribbon, bonding jumper, metallic cable or wire netting.
In above-mentioned cable grounding device, the metallic braid is the axial direction extension along the cable and along described
Multiple copper braid over braids that the circumferential direction of cable is contacted with each other or is spaced apart.
In above-mentioned cable grounding device, the electrical connecting member is made for one by welding with the grounded parts
Body.
In above-mentioned cable grounding device, in addition to it is arranged in the sealant of the radial outside of the electrical connecting member.
In above-mentioned cable grounding device, the sealant includes the glass fiber tape for being impregnated with epoxy resin.
In above-mentioned cable grounding device, in addition to it is arranged in the heat-shrink tube of the radial outside of the sealant.
One or more of to achieve these goals, according to another aspect of the present disclosure, there is provided a kind of power cable
System.The power cable system includes cable grounding device as described above.
According to the disclosure, on the one hand, compared with using the relevant programme of welding, pass through the ingenious knot between each material layer
The welding for closing to realize cable is grounded, so as to solve in prior welding mode due to the difference of operating personnel's technical merit
With electrical cable aluminium sheath gap it is too small caused by cable fault, and then can reduce because welded in installation process it is improper and caused by
Product bug, execute-in-place can be facilitated and the technical requirements to installation personnel can be reduced.On the other hand, due to passing through
Be embodied as the electrical connecting member of metallic braid etc. the axially grounded parts of docking and protective metal shell are electrically connected it is (special
It is not that the second end of electrical connecting member is removably electrically connected with protective metal shell), therefore, it is possible in a simple and effective way
Strengthen the electric conductivity between electrical connecting member and protective metal shell, have so as to be provided for axial dock cable grounding device
The ground connection schemes of reliable electric and mechanical connection.Especially, it is direct in electrical connecting member and protective metal shell and grounded parts
In the case that ground contacts and is disposed with conductive member between electrical connecting member and protective metal shell, it can further enhance and be electrically connected
Electric conductivity between connection member and protective metal shell is so as to more reliably strengthen the ground connection electric conductivity of cable grounding device.
Brief description of the drawings
By description referring to the drawings, the feature and advantage of one or more embodiments of the disclosure will become more
Plus be readily appreciated that, in the accompanying drawings：
Fig. 1 is the sectional side elevation for showing the cable grounding device according to correlation technique；
Fig. 2 is the power cable system for showing the cable grounding device using with good grounds disclosure illustrative embodiments
Sectional side elevation；
Fig. 3 A to Fig. 3 C are to show to be in different installation shapes according to the cable grounding device of disclosure illustrative embodiments
A series of schematic diagrames of state；
Fig. 4 is the schematic diagram for the conductive member for showing the cable grounding device according to disclosure illustrative embodiments；
Fig. 5 is the schematic diagram for the fastener for showing the cable grounding device according to disclosure illustrative embodiments；
Fig. 6 is the sectional side elevation for the power cable system for showing the cable grounding device using with good grounds disclosure modified example；
And
Fig. 7 is the vertical profile for the power cable system for showing the cable grounding device using another modified example of the with good grounds disclosure
Figure.
List of numerals
10', 10,10A, cable grounding fill 200 conductive members
10B is put
20 cable 200a, 200b, conductive member
200c、200d
The clip of 23 insulating barrier 300
The 24 insulating barriers sealant of semiconductive shielding layer 400
The heat-shrink tube of 25 protective metal shell 500
The grounded parts of 26 oversheath 600
100 electrical connecting member A axial directions
120 first end C circumferential directions
125 first kink CS power cable systems
140 the second end SP weld parts
145 second kinks
Embodiment
With reference to the accompanying drawings, the disclosure is described in detail by illustrative embodiments.It is of this disclosure following detailed
Carefully describe merely for the sake of illustration purpose, and be definitely not to the disclosure and its application or the limitation of purposes.
(Fig. 2 is to show the electric power electricity using the cable grounding device of with good grounds disclosure illustrative embodiments to reference picture 2
The sectional side elevation of cable system), using the power cable system CS of the cable grounding device of with good grounds disclosure illustrative embodiments
The first cable, the second cable and copper courage (such as aluminium courage and corresponding to the cable grounding according to the disclosure can be included
Device) 10.It is pointed out here that only showing one of the first cable and the second cable (i.e. cable 20, and another in Fig. 2
One in structure with cable 20 it is essentially identical and on the left of Fig. 2).Copper courage 10 be arranged in the first cable and the second cable it
Between and allow the first cable electrically connected with the second cable in copper courage 10 via connection component (not shown).Following article will be done
Further describe, copper courage 10 there can be ground connection structure to realize that power cable system CS welding ground connection (is installed
Live welding ground connection).Especially, the protective metal shell 25 of cable 20 can be electrically connected to copper by the ground connection structure of copper courage 10
The grounded parts 600 of courage 10, is achieved in power cable system CS welding ground connection.
Except copper courage (cable intermediate head accessory) application scenarios, the disclosure can also apply to other cable grounding dresses
10 are put, such as tail pipe 10 (tag annex).In this case, power cable system CS can include electrical equipment
(not shown and can be located on the left of Fig. 2), cable 20 and tail pipe 10 (corresponding to the cable grounding device according to the disclosure).
Tail pipe 10 is arranged between electrical equipment and cable 20.Tail pipe 10 can similarly have ground connection structure to realize electric power
Cable system CS welding ground connection (erecting bed welding ground connection).
In preferred example, power cable system CS be high voltage power cable system (such as 220kV and including
Other high voltage power cable systems including 110kV, 66kV).However, the disclosure is not restricted to this, but it can also be applied to
In the power cable system of other voltage class (such as middle pressure).
Referring additionally to Fig. 3 A to Fig. 3 C, (Fig. 3 A to Fig. 3 C are to show to be connect according to the cable of disclosure illustrative embodiments
Ground device is in a series of schematic diagrames of different installment states), according to the cable grounding device of disclosure illustrative embodiments
10 can include electrical connecting member 100, conductive member 200, (such as metal clip and corresponding to according to the disclosure of clip 300
Fastener), sealing enhancement layer 400 (i.e. sealant and referring to Fig. 3 C), heat-shrink tube 500 and grounded parts 600 (wherein,
Electrical connecting member 100, conductive member 200, clip 300, sealing enhancement layer 400 and heat-shrink tube 500 may be constructed cable grounding dress
Put 10 ground connection structure).In some instances, cable 20 can include (referring to Fig. 3 A) from inside to outside：Conductor cores (are not shown
Go out), conductor cores semiconductive shielding layer (not shown), insulating barrier 23, insulating barrier semiconductive shielding layer 24, protective metal shell (example
Such as aluminium shield sheath) 25 and oversheath 26.As described above, ground connection structure is suitable to the protective metal shell 25 of cable 20 being electrically connected
It is connected to the grounded parts 600 of cable grounding device 10.
As shown in Fig. 2 grounded parts 600 can be with the protective metal shell 25 of generally cylindrical, to be grounded cable 20
Axially it is docked to grounded parts 600.For example, the axial end portion of protective metal shell 25 is inserted in the axial end portion of grounded parts 600, and
And the outer surface of the axial edge contacting metal sheath 25 of grounded parts 600.Herein, axially docking can refer to：Two
Being indirectly connected with or one via intermediary's component of the direct abutting of the axial end of part, the axial end of two parts
The axial end portion of part is inserted in the axial end portion of another part cylindrical in shape.In the case where axial end portion is mutually nested, two
Individual part, which can be contacted, to be contacted.
Electrical connecting member 100 can be with both electrical contacts of protective metal shell 25 and grounded parts 600.In preferred example,
Electrical connecting member 100 may be embodied as each extending approximately along the axial direction A of cable 20 (i.e. with cable 20 it is almost parallel or
Person says also to be allowed at an angle with cable 20) and along cable 20 contacting with each other of being arranged in juxtaposition of circumferential direction C or
It is spaced apart multiple metallic braids (such as copper braid over braid or for copper litz wire) 100 of (being for example evenly spaced apart).In addition,
It is appreciated that, it would however also be possible to employ other suitable with different materials (such as copper alloy, aluminium alloy) and/or structure type
Conductor, for example, bonding jumper (such as laths of metal), metallic cable or wire netting (such as tubular dictyosome).
The number of metallic braid 100 can be set according to the diameter of cable 20, such as can be for 6,8,12 simultaneously
And 1 metallic braid 100 even can be only set.Construction electrical connecting member 100 (is particularly arranged in juxtaposition by this way
Multiple copper braid over braids), it can be advantageous to improve the conductive stability and uniformity of cable grounding device 10.
According to the disclosure, conductive member 200 can be one or more.Especially, at least one in conductive member 200
To be arranged in the protective metal shell inner conductive component 200b between electrical connecting member 100 and protective metal shell 25, thus, for example by
In can increase contact surface area and due to conductive member in itself have high conductivity and can strengthen electrical connecting member 100 with
Electric conductivity between protective metal shell 25.
In preferred example, referring additionally to Fig. 4, (Fig. 4 is to show the cable according to disclosure illustrative embodiments
The schematic diagram of the conductive member of earthing or grounding means), conductive member 200 is embodied as so-called penetration type conducting strip.Especially, penetration type
At least one surface in two surfaces (inner surface and outer surface) of conducting strip has concaveconvex structure (roughened textures),
The concaveconvex structure is preferably configured to sharp projection so as to suitable for being pierced into the corresponding conduction being in contact with penetration type conducting strip
Surface (such as outer surface of protective metal shell 25).In some instances, can regularly it be provided with penetration type conducting strip many
Individual sharp projection and corresponding multiple depressed parts, projection and depressed part can be evenly distributed, can be by between each two projection
One depressed part is spaced apart.Because the sharp projection with this concaveconvex structure, conductive member 200 can puncture such as metal shield
The oxide layer formed on the outer surface of set 25 (needs to slice off oversheath and make protective metal shell exposed during due to installing at the scene
And cause oxidation), it is possible thereby to strengthen the electric conductivity between conductive member and protective metal shell and then strengthen electrical connecting member and gold
Belong to the electric conductivity between sheath, and the troublesome operation in erecting bed artificial removal's protective metal shell oxide layer can be avoided.
In some instances, all two surfaces of penetration type conducting strip are respectively provided with concaveconvex structure, it is possible thereby to by leading
Electric components 200 and more effectively strengthen the electric conductivity between electrical connecting member 100 and protective metal shell 25.In other examples,
In the case of protective metal shell is with inner conductive component 200b, it can only make the outside with protective metal shell 25 of penetration type conducting strip
The inner surface that surface is faced has concaveconvex structure, it is possible thereby to ensure that conductive member 200 can provide suitably electrically conductive property and change
Simplify the processing of conductive member 200 while entering.
In some instances, conductive member 200 can be that (especially, conductive member 200 is by piece with flexible conducting strip
Shape material is made), so as to the circumferential direction C along cable 20 is wrapped on protective metal shell 25 and in completely or partially annular,
And conductive member 200 can be improved to connect so as to increase surface with the form fit of electrical connecting member 100 and protective metal shell 25
Contacting surface is accumulated).Especially, the length of conductive member 200 is arranged so that conductive member 200 just forms an annulus or winding
Less than one week, the formation of conductive member 200 overlap joint is thus avoided and outstanding so as to ensuring conductive member 200 with electrically connecting
The reliable contacts of component 100.
Conductive member 200 could be arranged to the multiple conducting strips being arranged in juxtaposition along the axial direction A of cable 20.In diagram
In example, reference picture 3B is provided with two inner conductive component 200b and an outer conductive component 200d.Conductive member 200
Can by it is elastic preferably, larger and with stronger electric conductivity the beryllium-bronze of hardness be made, and preferably carry out silver-plated process with
Further enhance electric conductivity.In some instances, the width of conductive member 200 can be about 30mm and thickness can be about 2mm.
It is pointed out here that conductive member 200 is not restricted to concrete structure as described above, but can also
Using other suitably there is different materials (such as aluminum or aluminum alloy) and/or structure type (such as two surfaces are flat
Smooth surface) conductive member.
Clip 300 is suitable to fastening electrical connecting member 100 and/or conductive member 200.Especially, clip 300 is suitable to physics
Electrical connecting member 100 and/or conductive member 200 are pressed against and these components are connected into one by mode towards protective metal shell 25
Rise, so as to increase (radial direction) contact force between the conductive member 200 of electrical connecting member 100/ and protective metal shell 25, it is possible thereby to increase
Electric conductivity between forceful electric power connecting elements 100 and protective metal shell 25.
In some instances, clip 300 can be positioned at position (axial location) place corresponding with conductive member 200,
So that the appropriate section of electrical connecting member 100 is sandwiched between clip 300 and conductive member 200.In this way, it is possible to effectively
Together with electrical connecting member 100, conductive member 200 are firmly attached (pressing) with protective metal shell 25 by ground, so as to enter one
Electric conductivity between step enhancing electrical connecting member 100 and protective metal shell 25.
Clip 300 needs circumferentially around cable 20 when in use, and therefore, in preferred example, clip 300 is by non-magnetic
Property metal material (such as stainless steel particularly S304 stainless steels) be made with avoid causing sensing and occur heating (avoid produce whirlpool
Stream or magnetic hystersis loss) situations such as.Clip 300 can be using that can be conveniently adjusted the form of diameter, and (Fig. 5 is to show root to such as Fig. 5
According to the schematic diagram of the clip of the cable grounding device of disclosure illustrative embodiments) shown in, clip 300 can be the snail of ring-type
Worm and gear formula clip.Specification size (the example of clip 300 used in being determined according to the minimum and maximum section of cable
Such as, the clip of four specifications can be selected to cover all use requirements in high voltage power cable system).Here, it is necessary to refer to
Go out, clip (fastener) is not restricted to concrete structure as described above, but can also suitably be had using other
The fastener of different materials and/or structure type.
Reference picture 2, electrical connecting member (such as metallic braid) 100 can include first be connected with grounded parts 600
(axial direction) end 120 and second (axial direction) end 140 being connected with protective metal shell 25.In disclosure illustrative embodiments
In, first end 120 (preferably weld) connected (in inside plants) when dispatching from the factory to grounded parts 600, that is, will
Metallic braid 100 is made for an entirety with grounded parts 600.In this manner it is possible to enter required for reducing in erecting bed
Capable operation, so that in-site installation becomes more simple and conveniently so as to improving installation quality and efficiency.
In this case, the second end 140 can include back bending and overlapping on the body of the second end 140
Bending end (the second kink) 145.Furthermore it is preferred that conductive member 200 also includes being arranged in bending end 145 and this
Outer conductive component 200d between body portion, and cable grounding device 10 also includes outside clip 300, outside clip 300 can be with
It is positioned at position (axial location) place corresponding with outer conductive component 200d so that a part for bending end 145 is pressed from both sides
Put between outside clip 300 and outer conductive component 200d.In this way, it is possible to make electrical connecting member 100 more firmly connect
Protective metal shell 25 is connected to, the electric of cable grounding device 10 is therefore ensured that and mechanically connects reliability.
Sealing enhancement layer 400 can be arranged in the radial outside of electrical connecting member 100 and conductive member 200.Preferred
In example, sealing enhancement layer 400 includes the glass fibre belt for being impregnated with epoxy resin.Especially, sealing enhancement layer 400 can be with
Including the multiple glass fibre belts for being impregnated with epoxy resin that are wound with overlapping mode (such as half overlapping overlapping mode) (for example
5 layers).
In some instances, epoxy resin can use the epoxy resin of cold curing, the operating time of the epoxy resin
More than 15 minutes, gel time was less than 60 minutes.The viscosity of the epoxy resin should not excessive (for example 3000-8000mPa.s be
Can) and be thoroughly impregnated glass fiber tape with stronger penetrating power.
Due to setting sealing enhancement layer 400, on the one hand can be provided for the ground connection structure of cable grounding device 10 can
The waterproof seal leaned on, and on the other hand can also improve the mechanical coupling strength of the ground connection structure of cable grounding device 10
(mechanical stretching performance).
Heat-shrink tube 500 can be arranged in the radial outside of sealing enhancement layer 400.By setting heat-shrink tube 500 in outermost layer,
The waterproof seal of the ground connection structure of cable grounding device 10 can further be improved and cable grounding device can be made
10 ground connection structure possesses to anti-ultraviolet ability.
It (is specially cable grounding dress to be briefly described below according to the cable grounding device 10 of disclosure illustrative embodiments
Put 10 ground connection structure) exemplary field-mounted process.
When installing at the scene, by inner conductive component (penetration type conducting strip) 200b, circumferentially direction C is wrapped in gold first
Belong on sheath 25 (reference picture 3A).Then, arrangement electrical connecting member (metallic braid) 100.Electrical connecting member is (metal knitted
Band) 100 first end 120 has been soldered to grounded parts 600 when dispatching from the factory (in inside plants), that is, metal is compiled
Ribbon 100 is made for an entirety with grounded parts 600.Then, the use of clip 300 (is specially not weld by electrical connecting member 100
The second end 140 connect) and conductive member 200 be fastened on protective metal shell 25.Then, by outer conductive component 200d circumferentially
Direction C is wrapped on electrical connecting member 100.Then, it is the reserved part of the second end 140 of electrical connecting member 100 is reversely curved
Roll over and form bending end 145.Then, the fastening of clip 300 electrical connecting member 100 (is particularly electrical connecting member 100 on the outside of use
The second kink 145) and conductive member 200 (particularly outer conductive component 200d).Then, by glass fiber tape to overlap
Mode is wrapped on electrical connecting member region and forms untreated first glass fibre belt, it is preferable that winding zone exceedes
Two axial end portions of electrical connecting member are not less than 50mm.Then, epoxy resin is coated on the glass fibre belt and caused
The glass fibre belt is saturated to form the first glass fibre belt for being impregnated with epoxy resin.Here it is possible to repeat
The winding of row glass fiber tape and the operating process of the coating of epoxy resin so that the sealing enhancement layer 400 being ultimately formed has
There are the multiple glass fibre belts (such as with about 5 layers of glass fibre belt) for being impregnated with epoxy resin.Then, in outermost layer
Epoxy surface drying after, carry out heat-shrink tube 500 contraction process.Here, the inside at the two ends of heat-shrink tube 500 can equably be applied
It is covered with PUR.After contraction process completion, sealing enhancement layer region should be completely covered in heat-shrink tube 500, and preferably,
The oversheath 26 (reference picture 3A) and grounded parts 600 of heat-shrink tube 500 and cable 20 have the overlapping regions not less than 50mm.
Referring to Fig. 6 (Fig. 6 be show using with good grounds disclosure modified example cable grounding device power cable system
The sectional side elevation of system) description is according to the cable grounding device 10A of disclosure modified example.According to the cable grounding device 10A of modified example
With cable grounding device 10 as described above is in structure and installs essentially identical.For brevity, will only it retouch below
State cable grounding device 10A and cable grounding device 10 difference.
In cable grounding device 10A, the first end 120 of electrical connecting member (metallic braid) 100 is not in factory
Portion connects (welding) to grounded parts 600 in advance.In this case, first end 100 can include back bending and overlapping
Bending end (the first kink) 125 on the body of first end.Furthermore it is preferred that conductive member 200 also includes cloth
Put the grounded parts inner conductive component 200a between electrical connecting member 100 and grounded parts 600.Thus, with the second end
Portion 140 is similar, and first end 100 can be using inner conductive component 200a, outer conductive component 200c and clip 300 come real
Now with the connection of grounded parts 600.
According to cable grounding device 10, the 10A of the disclosure, on the one hand, compared with using the relevant programme of welding, by each
Ingenious combination between individual material layer realizes that welding of the cable in erecting bed is grounded, so as to solve traditional welding side
The cable fault caused by the difference of operating personnel's technical merit and electrical cable aluminium sheath gap are too small in formula, and then can subtract
It is few because welded in installation process it is improper and caused by product bug, execute-in-place can be facilitated and can reduce to installing people
The technical requirements of member.On the other hand, due to electrical connecting member the connecing axially docking by being embodied as metallic braid etc.
Ground part is electrically connected with protective metal shell, and (the second end of particularly electrical connecting member is removably electrically connected with protective metal shell
Connect), therefore, it is possible to strengthen the electric conductivity between electrical connecting member and protective metal shell in a simple and effective way, so as to for
Axial dock cable grounding device provides the ground connection schemes with reliable electric and mechanical connection.Especially, it is being electrically connected
Connection member directly contacts with protective metal shell and grounded parts and conduction is disposed between electrical connecting member and protective metal shell
In the case of component, the electric conductivity between electrical connecting member and protective metal shell can be further enhanced more reliably to strengthen electricity
The ground connection electric conductivity of cable earthing or grounding means.
In this respect, inventor to according to the disclosure include copper braid over braid, penetration type conducting strip (silver-plated beryllium-bronze),
Metal clip (S304 stainless steels), the ground connection for being impregnated with the glass fibre belt of epoxy resin and the cable grounding device of heat-shrink tube
Attachment structure carries out performance test.As a result find, in mechanical performance (tensile strength), sealing property and electric property (including material
Expect electric property, ground connection electric conductivity and 220kV cable accessories electric property) on it is quite preferable.Especially, electric property
Test result is even more excellent without significant difference compared with using the test result of the electric property of the contrast product of welding.
A variety of different modifications can be allowed according to the cable grounding device of the disclosure, these modifications can also be relative to correlation
Scheme obtains certain advantageous effects.
For example, it is convenient to omit clip.In this case, for example because sealing enhancement layer 400 (particularly seals enhancement layer
Glass fiber tape in 400) and heat-shrink tube higher mechanical strength can be also provided, therefore still can suitably ensure cable grounding
The mechanical strength of the ground connection structure of device.
In another example, it is contemplated that substitute or even omit specifically described sealing enhancement layer 400 and heat-shrink tube 500 above
Scheme, it is, for example, possible to use other suitable sealing enhancement layer and outermost protections with different materials and/or structure type
Layer.
In another example, in the cable grounding device 10B as shown in Figure 7 according to another modified example of the disclosure, with institute above
The cable grounding device 10 of description is different, and the second end 140 being connected with protective metal shell 25 of electrical connecting member 100 can not be wrapped
Include the bending end for back bending and overlapping on the body of the second end 140.
In this manual, whenever refer to " illustrative embodiments ", " some examples ", " other examples ", " preferably show
Mean to include for specific feature, structure or the feature of the embodiment/example description when example " and " example of diagram " etc.
In at least one embodiment/example of the disclosure.The appearance of different places differs and established a capital in this manual for these words
Refer to same embodiment/example.Specific feature, structure or feature are described for any embodiment/example in addition, working as
When, it will be understood that those skilled in the art also can be in other embodiment/example in all embodiment/examples
Realize this feature, structure or feature.
Although the disclosure is described with reference to illustrative embodiments, but it is to be understood that the disclosure is not
It is confined to the embodiment/example be described in detail and shown in text.Without departing from claims limited range
In the case of, those skilled in the art can make various changes to illustrative embodiments.
Claims (19)
1. a kind of cable grounding device, it is characterised in that the cable grounding device includes：
Grounded parts, the protective metal shell of cable to be grounded axially is docked to the grounded parts；And
Electrical connecting member, the electrical connecting member include the first end that is electrically connected with the grounded parts and with the metal
The second end that sheath is removably electrically connected.
2. cable grounding device according to claim 1, wherein, in addition to contact to strengthen with the electrical connecting member
It is grounded the conductive member of electric conductivity.
3. cable grounding device according to claim 2, wherein, the conductive member includes being arranged in the first end
Conductive member between the grounded parts and/or the conductive structure being arranged between the second end and the protective metal shell
Part.
4. cable grounding device according to claim 2, wherein：
The first end includes the first kink, and first kink back bends and overlapped on the sheet of the first end
In body portion, and/or
The second end includes the second kink, and second kink back bends and overlapped on the sheet of the second end
In body portion.
5. cable grounding device according to claim 4, wherein, the conductive member includes being arranged in the first end
Body and the first kink between conductive member and/or be arranged in the body and the second kink of the second end
Between conductive member.
6. cable grounding device according to claim 1, in addition to suitable for the electrical connecting member is fastened into described connect
The fastener of ground part, and/or, in addition to suitable for the electrical connecting member to be fastened to the fastening of the protective metal shell
Part.
7. cable grounding device according to claim 2, in addition to suitable for fastening the electrical connecting member and the conduction
The fastener of component, wherein, the fastener be positioned at at the axially opposing position answered of the conductive member.
8. the cable grounding device according to claim 6 or 7, wherein, the fastener is clip.
9. the cable grounding device according to any one of claim 2,3,4,5 and 7, wherein, the conductive member is by piece
Shape material is made, and the inner surface of the conductive member is tied with least one surface structure in outer surface into bumps
Structure.
10. cable grounding device according to claim 9, wherein, the concaveconvex structure is configured with sharp projection.
11. the cable grounding device according to any one of claim 2,3,4,5 and 7, wherein, the conductive member has been in
It is fully or partially annular.
12. the cable grounding device according to any one of claim 2,3,4,5 and 7, wherein, the conductive member is plating
The beryllium-bronze conductive member of silver.
13. cable grounding device according to any one of claim 1 to 7, wherein, the electrical connecting member is along described
Metallic braid, bonding jumper, metallic cable or the wire netting of the axial direction extension of cable.
14. cable grounding device according to claim 13, wherein, the metallic braid is along the axial direction of the cable
Multiple copper braid over braids that direction extends and contacts with each other or be spaced apart along the circumferential direction of the cable.
15. cable grounding device according to any one of claim 1 to 7, wherein, the electrical connecting member connects with described
Ground part is made up of welding to be integrated.
16. cable grounding device according to any one of claim 1 to 7, in addition to it is arranged in the electrical connecting member
Radial outside sealant.
17. cable grounding device according to claim 16, wherein, the sealant includes the glass for being impregnated with epoxy resin
Glass fiber band.
18. cable grounding device according to claim 16, wherein, in addition to it is arranged in the radial outside of the sealant
Heat-shrink tube.
19. a kind of power cable system, it is characterised in that the power cable system is included as any in claim 1 to 18
Cable grounding device described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621102103.XU CN206388875U (en) | 2016-09-30 | 2016-09-30 | Cable grounding device and power cable system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621102103.XU CN206388875U (en) | 2016-09-30 | 2016-09-30 | Cable grounding device and power cable system |
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| Publication Number | Publication Date |
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| CN206388875U true CN206388875U (en) | 2017-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621102103.XU Expired - Fee Related CN206388875U (en) | 2016-09-30 | 2016-09-30 | Cable grounding device and power cable system |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110246624A (en) * | 2019-06-29 | 2019-09-17 | 信承瑞技术有限公司 | The earthy contact chip of high-tension cable and HV cable accessories aluminium sheath earthing method |
| WO2019179318A1 (en) * | 2018-03-21 | 2019-09-26 | 精进电动科技股份有限公司 | Joint structure for high-voltage cable |
| CN112054446A (en) * | 2020-09-21 | 2020-12-08 | 广东电网有限责任公司 | Connecting structure of tail pipe and protective layer of cable terminal and manufacturing method of connecting structure |
-
2016
- 2016-09-30 CN CN201621102103.XU patent/CN206388875U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019179318A1 (en) * | 2018-03-21 | 2019-09-26 | 精进电动科技股份有限公司 | Joint structure for high-voltage cable |
| US11205866B2 (en) | 2018-03-21 | 2021-12-21 | Jing-Jin Electric Technologies Co., Ltd. | Joint structure for high-voltage cable |
| CN110246624A (en) * | 2019-06-29 | 2019-09-17 | 信承瑞技术有限公司 | The earthy contact chip of high-tension cable and HV cable accessories aluminium sheath earthing method |
| CN110246624B (en) * | 2019-06-29 | 2024-04-16 | 信承瑞技术有限公司 | Contact piece for grounding high-voltage cable and aluminum sheath grounding method for high-voltage cable accessory |
| CN112054446A (en) * | 2020-09-21 | 2020-12-08 | 广东电网有限责任公司 | Connecting structure of tail pipe and protective layer of cable terminal and manufacturing method of connecting structure |
| CN112054446B (en) * | 2020-09-21 | 2022-02-11 | 广东电网有限责任公司 | Connecting structure of tail pipe and protective layer of cable terminal and manufacturing method of connecting structure |
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