CN208335899U - Cable sheath protective device - Google Patents
Cable sheath protective device Download PDFInfo
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- CN208335899U CN208335899U CN201820871643.7U CN201820871643U CN208335899U CN 208335899 U CN208335899 U CN 208335899U CN 201820871643 U CN201820871643 U CN 201820871643U CN 208335899 U CN208335899 U CN 208335899U
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Abstract
A kind of cable sheath protective device of the utility model includes protector and installs case, and protector includes ontology, first electrode contact area, second electrode contact area and insulating regions, and ontology includes first end face and second end face；First electrode contact area, second electrode contact area and insulating regions are exposed at least one of first end face and second end face, and insulating regions insulation set is between first electrode contact area and second electrode contact area；Installs case includes first electrode mating area and second electrode mating area, first electrode contact area and first electrode mating area conductive contact, second electrode contact area and second electrode mating area conductive contact.When being placed in guard box of protector in the utility model cable sheath protective device can also realize that protector and cable sheath are conductively connected, and are not necessarily to other auxiliary mounting elements, structure is simple and convenient for disassembly and assembly as conducting element while guard box protects protector.
Description
Technical field
The utility model relates to high voltage supply field, in particular to a kind of cable sheath protective device.
Background technique
Cable sheath protective device is the tie point of metallic cable sheath and the earth, and the protection of high-tension cable sheath is general at present
All over using zinc oxide valve plate protector.
Under normal working voltage, high resistance is presented in protector, extremely small by the operating current of protector, basic to locate
In off state, cable sheath is separated with the earth, and no current passes through cable sheath at this time.
When having lightning stroke in cable conductor or Operating Over Voltage Surge wave is propagated, the metal sheath of cable can sense generation
Impulse overvoltage, when the lightning stroke or switching overvoltage occurred on cable sheath reaches the origination action voltage of protector, protect
The resistance value of shield device declines quickly, so that conducting between cable sheath and the earth is formed access, allows the high current of generation by cable protection
Layer flows into the earth through protector, and at this moment the voltage on cable sheath is only the voltage of protector when passing through electric current, and this voltage
And origination action voltage is more much lower than impulse overvoltage, high current flows into the earth from protector, rather than passes through breakdown sheath
The earth is flowed into, to protect destruction of the cable sheath from arriving overvoltage.
After having served as loss of voltage, resistor valve sheet restores its high-resistance characteristic again, and protector and cable run are restored to again
The state normally disconnected with the earth.
However, the structure of traditional cable sheath protective device is cumbersome, so that operator is carrying out cable sheath protection
It is extremely inconvenient when device dismounts.
Utility model content
Based on this, it is necessary to for the problem that the dismounting of above-mentioned traditional cable sheath protective device is inconvenient, provide one kind and be convenient for
The cable sheath protective device of dismounting.
A kind of cable sheath protective device, including protector and installs case, the protector are sealed at the installation
In case；The protector includes ontology, first electrode contact area, second electrode contact area and insulating regions, and described
Body includes the first end face and second end face being oppositely arranged；The first electrode contact area, the second electrode contact area
And the insulating regions are exposed at least one of the first end face and the second end face simultaneously, and the insulation layer
Domain insulation set is between the first electrode contact area and the second electrode contact area；The installs case includes first
Electrode mating area and second electrode mating area, the first electrode contact area are set to the installation in the protector
When in case and the first electrode mating area conductive contact, the second electrode contact area are set to institute in the protector
When stating in installs case with the second electrode mating area conductive contact.
The ontology includes first electrode part, second electrode part, function element and insulation in one of the embodiments,
Sealant, the second electrode part are surrounded on first electrode part periphery, and the first electrode part and the second electrode
It defines to form accommodation space between part；The function element is set in the accommodation space, the insulated enclosure layer sealing packet
The surface that the function element is exposed to the accommodation space is wrapped up in, the first electrode contact area is led with the first electrode part
Electrical connection, the second electrode contact area and the second electrode part are conductively connected.
In one of the embodiments, the first electrode contact area and the second electrode contact area be respectively with
The conductive coating of the first electrode part and second electrode part electrical connection.
The first electrode part is cylindrical rod in one of the embodiments, and the second electrode part is described to be sheathed on
First electrode part is outer and the cylinder concentric with the first electrode part, the first electrode contact area are the first electrode part
Exposed circular cross section, the second electrode contact area are the circular cylindrical cross-section of the second electrode part.
It each protector independence and is sealed in each installs case in one of the embodiments,.
The installs case includes cabinet, lid and sealing element in one of the embodiments, and the lid is removably
Lid sets the cabinet, and the sealing element is sealed between the cabinet and the lid.
The cabinet includes bottom wall and is extended to form in the same direction by the bottom wall outer rim in one of the embodiments,
Side wall, the bottom wall and the side wall be enclosed accommodating chamber open at one end, the first electrode mating area and described
Second electrode mating area is both formed in the bottom wall, and the first electrode mating area and the second electrode mating area
It include the first conducting surface towards the accommodating chamber and the second conducting surface being exposed to outside the bottom wall.
The first electrode mating area is the circle for being set to the bottom wall central in one of the embodiments,
Domain, the second electrode mating area be surrounded on the first electrode mating area it is outer and with the first electrode mating area
The circle ring area being arranged concentrically.
The lid is threadedly coupled with the cabinet in one of the embodiments,.
The function element is to be set to the first electrode part and the second electrode part in one of the embodiments,
Between piezoresistive wafer.
When being placed in guard box of protector in the utility model cable sheath protective device, passes through first electrode contact zone
Domain and second electrode contact area respectively with first electrode mating area and second electrode mating area conductive contact, to realize
While guard box protects protector, it can also realize that protector connects with the cable sheath conduction protected as conducting element
It connects, other auxiliary mounting elements is not necessarily to when installation, also without carrying out other auxiliary installation steps, structure is simple and convenient for disassembly and assembly.
Detailed description of the invention
Fig. 1 is the schematic perspective view of an embodiment of the present invention cable sheath protective device；
Fig. 2 is the cross-sectional view of protector in cable sheath protective device shown in Fig. 1；
Fig. 3 is the installation method flow chart of cable sheath protective device shown in Fig. 1.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes to the utility model
The understanding of disclosure is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more related listed items.
For the ease of the technical solution for the cable sheath protective device being better understood in the application, in detailed description
Before, cable sheath protective device in the prior art is simply introduced.
Cable sheath protective device includes piezoresistive wafer and two electrodes, and wherein piezoresistive wafer is non-linear zinc oxide
Resistor disc, two electrodes are two screw rods for being axially set in piezoresistive wafer both ends, in non-linear ZnO resistor piece and two
Insulating resin is coated with outside a electrode, and the outer end face for exposing two electrodes is electrically connected to be formed with the cable sheath protected
Core.
During installation, cable sheath protective device is placed in installs case, makes each cable sheath protective device bottom
Screw rod be disposed through the metal connecting plate of installs case bottom and fastened by nut, to realize that cable sheath protective device is logical
Being electrically connected for screw rod and metal connecting plate is crossed, finally by metal connecting plate and the conducting wire electricity drawn by the cable sheath protected
Connection, final realization cable sheath protective device are electrically connected with cable sheath.
Under normal circumstances, the resistance value of piezoresistive wafer is quite big, so that cable sheath protective device is equivalent to place
In off state, and when induced voltage is excessively high, due to the characteristic of piezoresistive wafer, resistance value is reduced rapidly, and makes cable protection
Layer protective device is in the conductive state, so that excessively high induced voltage is released through cable sheath protective device, reaches
The purpose for protecting cable jacket not punctured by induced overvoltage.
However, operator needs limited in installs case itself when cable sheath protective device is placed in installs case
Space in auxiliary mounting tool or hand protruded into installs case bottom, screw rod is fastened with nut, realizes screw rod and gold
Belong to being fixedly connected for connecting plate, so increases the dismounting difficulty of cable sheath protective device.
Therefore, it is necessary to provide a kind of easy-to-mount cable sheath protective device.
As depicted in figs. 1 and 2, in the utility model preferred embodiment, cable sheath protective device 300 includes protector
100 and guard box 200.Protector 100 be sealed in guard box 30 and including ontology 10, first electrode contact area 30,
Second electrode contact area 50 and insulating regions 70.Wherein, ontology 10 includes the first end face 11 and second end being oppositely arranged
Face 12.First electrode contact area 30, second electrode contact area 50 and insulating regions 70 are exposed to first end face 11 simultaneously
With at least one of second end face 12, and 70 insulation set of insulating regions connects in first electrode contact area 30 and second electrode
It touches between region 50.That is, first electrode contact area 30, second electrode contact area 50 and insulating regions 70 are simultaneously
It is exposed in protector 100 at least one of both first end face 11 and second end face 12, such first electrode contact area
30 and second electrode contact area 50 can be by electricity outer conductive element (such as metal connecting plate or conductive filament) and protected
Cable sheath forms electrical circuit, is protected with realizing to the cable sheath protected.
The application utility model people is the study found that when carrying out cable sheath protection, by multiple protectors in traditional approach
It is placed in installs case, and is anchored on the metal connecting plate of installs case simultaneously jointly；And when water penetrates into installs case because unexpected
When, multiple protectors are submerged simultaneously, poor waterproof properties.
Each protector 100 is independent sealed in the application is set in each installs case 200, i.e., each protector 100
Possess independent installs case 200, even if water is because in the unexpected one of installs case 200 of infiltration, also not will cause multiple protections
Device 100 fails simultaneously, improves the safety and waterproof performance of cable sheath protective device 300.
Specifically, ontology 10 includes first electrode part 13, second electrode part 14, function element 15 and insulated enclosure layer
16.Wherein, second electrode part 14 is surrounded on 13 periphery of first electrode part, and defines to form receiving sky between first electrode part 13
Between 130.Function element 15 is set in accommodation space 130, for realizing voltage protection function.16 sealed envelope of insulated enclosure layer
Function element 15 is exposed to the surface of accommodation space 130, and function element 15 is sealed in accommodation space 130, and real simultaneously
Now to the insulation between first electrode part 13 and second electrode part 14.
Ontology 10 is cylinder in one of the embodiments, and first end face 11 and second end face 12 are the two of ontology 10
A axial end face, first electrode contact area 30 are exposed to the center of at least one of first end face 11 and second end face 12, the
Two electrode contact regions 50 are disposed concentrically about outside first electrode contact area 30.That is, first electrode contact area 30 with
Second electrode contact area 50 is two concentric circles for being exposed at least one of first end face 11 and second end face 12, insulation layer
Domain 70 is filled in the spacing between two concentric circles.In this embodiment, first electrode contact area 30 is and ontology 10
Coaxial filled circles region, second electrode contact area 50 are disposed concentrically about the circle ring area of first electrode contact area 30.
In wherein another embodiment, first electrode contact area 30 and second electrode contact area 50 are around this
The circle ring area of 10 central axis of body setting, insulating regions 70 are also can be filled at this time in first electrode contact area 30 and simultaneously
It is filled between first electrode contact area 30 and second electrode contact area 50.
It is to be appreciated that ontology 10, first electrode contact area 30 and second electrode connect in some other embodiment
Touch region 50 shape can as needed depending on, for example, ontology 10 be cube, first electrode contact area 30 and second electricity
Pole contact area 50 be formed in the square region of cube wherein at least one end face also can, be not construed as limiting, only need herein
It realizes at least one end face in ontology 10 while being provided with for the first electrode with protected cable sheath formation electrical circuit
Contact area 30 and second electrode contact area 50.
First electrode contact area 30 and first electrode part 13 are conductively connected, second electrode contact area 50 and second electrode
Part 14 is conductively connected.In this way, so as to being located at the first electrode of the same end face of ontology 10 (first end face 11 and/or second end face 12)
Contact area 30 and second electrode contact area 50 can be connected to form electrical circuit with protected cable sheath.
First electrode contact area 30 and second electrode contact area 50 are respectively and first in one of the embodiments,
The conductive coating that electrode piece 13 and second electrode part 14 are electrically connected.That is, the same end face of ontology 10 (first end face 11 and/
Or second end face 12) be coated with and counter electrode part (first with its interior first electrode part 13 and 14 corresponding position of second electrode part
Electrode piece 13 and second electrode part 14) coating that is conductively connected, with realize first electrode part 13 and second electrode part 14 by pair
Answer conductive coating (first electrode contact area 30 and second electrode contact area 50) and protected cable sheath conductive communication.
In wherein another embodiment, first electrode contact area 30 is the cross-sectional area of the exposure of first electrode part 13
Domain, second electrode contact area 50 are the cross section of the exposure of second electrode part 14.That is, first electrode contact area
30 and second electrode contact area 50 be directly exposed to first end face 11 and/or for first electrode part 13 and second electrode part 14
The cross section of biend 12, without carrying out the setting of other conductive components or conductive coating.In this way, ontology 10 can pass through exposure
In the first electrode part 13 of same end face (first end face 11 and/or second end face 12) and the cross section of second electrode part 14
Directly be connected to form electrical circuit with protected cable sheath.
In this embodiment, first electrode part 13 is cylindrical rod, and second electrode part 14 is to be sheathed on first electrode part
The 13 outer and cylinders concentric with first electrode part 13, first electrode contact area 30 are the rounded cross section of the exposure of first electrode part 13
Face, second electrode contact area 50 are the circular cylindrical cross-section of second electrode part 14.
In this way, protector 100 is whole cylindrical, and the space between the outer wall of cylindrical rod and the inner wall of cylinder is to hold
Receive space 130.Function element 15 be set in accommodation space 130 and be electrically connected to first electrode part 13 and second electrode part 14 it
Between.Specifically, function element 15 is the piezoresistive wafer being set between first electrode part 13 and second electrode part 14.
Wherein, there are certain first height between the axial both ends of first electrode part 13 and the corresponding end of function element 15
Difference, while also there are the second differences in height between the corresponding end of function element 15 at the both ends of 14 axial direction of second electrode part.That is, function
Element 15 in 100 short transverse of protector not and the first electrode part 13 of corresponding end and the axial end face of second electrode part 14
It flushes, and is less than the axial end face of corresponding end first electrode part 13 and second electrode part 14.That is, function element 15 exists
Exist between the first electrode part 13 at both ends and corresponding end in protector short transverse and the axial end face of second electrode part 14
One fixed spacing, insulated enclosure layer 16 are filled in the spacing, with sealing function element 15 and are realized to the first electrode of corresponding end
Part 13 and second electrode part 14 insulate.
In this embodiment, two end faces of 100 axial ends of protector are provided with first electrode contact area
30 and second electrode contact area 50, i.e. first electrode contact area 30 and second electrode contact area 50, are not limited thereto.
Continuing with ginseng referring to Fig. 2, when watching axial two end faces of protector 100, the exposure of each end face has round the
One electrode contact region 30, circular ring shape second electrode contact area 50 and be filled in first electrode contact area 30 and second electricity
The insulating regions 70 of pole contact area 50.
When assembling, protector 100 can by any one axial end face (first end face 11 and/or second end face 12) with
The mode of face contact makes first electrode contact area 30 on the end face and second electrode contact area 50 and the electricity by being protected
The corresponding lead that cable sheath is drawn is conductively connected and (can wherein connect for direct conduction, also can be to be conductively connected indirectly), with even
Electrical circuit between logical protector 100 and the cable sheath protected.
Installs case 200 includes cabinet 91, lid 93 and sealing element (not shown).Lid 93 removably covers and sets cabinet
91, sealing element is sealed between cabinet 91 and lid 93, and protector sealing is contained in installs case 200, peace is improved
The waterproof performance of vanning 200.Further, lid 93 is threadedly coupled with cabinet 91, to improve cable sheath protective device 300
Dismount convenience.
In this embodiment, installs case 200 and first electrode contact area 11 and second electrode contact area 31 are right
Position is answered to be respectively arranged with first electrode mating area 95 and second electrode mating area 97, first electrode contact area 11 is being protected
It is being protected when shield device is set in installs case 200 with 95 conductive contact of first electrode mating area, second electrode contact area 31
When device is set in installs case 200 with 97 conductive contact of second electrode mating area.
Since protector axial end face is provided with first electrode contact area 11 and second in cable sheath protective device 300
Protector is placed in cabinet 91 by electrode contact region 31 so in assembly, keeps first electrode contact area 11 and the
One electrode mating area, 95 conductive contact, and after second electrode contact area 31 and 97 conductive contact of second electrode mating area,
The sealing of lid 93 is bolted in cabinet 91.At this point, the cable sheath protective device 300 that assembly is completed can be cooperated by first electrode
Region 95 and second electrode mating area 97 and metal connecting plate are conductively connected, then realize metal connecting plate and cable by conducting wire
Sheath electrical connection.Alternatively, the cable sheath protective device 300 that assembly is completed can be by first electrode mating area 95 and the
Two electrode mating areas 97 directly by conducting wire be electrically connected with cable sheath also can, be not limited thereto.
Fig. 3 is please referred to, the installation method of the utility model cable sheath protective device 300 comprising following steps:
S10: each protector 100 is independently placed in the cabinet 91 of each installs case 200, and makes each protector
100 first electrode contact area 11 and second electrode contact area 31 respectively with the first electrode mating area 95 in cabinet 91
With 97 conductive contact of second electrode mating area.
Wherein, first electrode contact area 11 is the border circular areas being set at least one axial end face of protector 100,
Second electrode contact area 31 is to be set at least one axial end face of protector 100 to be surrounded on first electrode contact area 11
Outer circle ring area.In this way, when protector 100 is placed in the cabinet 91 of installs case 200,11 He of first electrode contact area
Second electrode contact area 31 and 97 face of first electrode mating area 95 and second electrode mating area being formed in cabinet 91
The conductive connection of protector 100 and 91 corresponding position of installs case is realized in contact.
S20: 93 sealing cover of lid of each installs case 200 is set into cabinet 91, with the protection to being placed in installs case 200
Device 100 seals waterproofing protection.
S30: first electrode mating area 95 and second electrode mating area 97 are electrically connected by conducting wire with cable sheath,
The protector in installs case 200 100 will be so set to and cable sheath is conductively connected.
When being placed in guard box 200 of protector 100 in the utility model cable sheath protective device 300, passes through first
Electrode contact region 30 and second electrode contact area 50 respectively with first electrode mating area 95 and second electrode mating area
97 conductive contacts, to also can realize protector as conducting element while realizing that guard box 200 protects protector 100
100 are conductively connected with the cable sheath protected, and when installation is not necessarily to other auxiliary mounting elements, also pacify without carrying out other auxiliary
Step is filled, structure is simple and convenient for disassembly and assembly.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of cable sheath protective device, which is characterized in that the cable sheath protective device includes protector and installs case,
The protector is sealed in the installs case；The protector includes ontology, first electrode contact area, second electrode
Contact area and insulating regions, the ontology include the first end face and second end face being oppositely arranged；The first electrode connects
Touching region, the second electrode contact area and the insulating regions are exposed to the first end face and the second end simultaneously
On at least one of face, and the insulating regions insulation set is contacted in the first electrode contact area and the second electrode
Between region；The installs case includes first electrode mating area and second electrode mating area, the first electrode contact zone
Domain when the protector is set in the installs case with the first electrode mating area conductive contact, the second electrode
Contact area when the protector is set in the installs case with the second electrode mating area conductive contact.
2. cable sheath protective device according to claim 1, which is characterized in that the ontology include first electrode part,
Second electrode part, function element and insulated enclosure layer, the second electrode part are surrounded on first electrode part periphery, and institute
It states and defines to form accommodation space between first electrode part and the second electrode part；It is empty that the function element is set to the receiving
In, function element described in the insulated enclosure layer sealed envelope is exposed to the surface of the accommodation space, the first electrode
Contact area and the first electrode part are conductively connected, and the second electrode contact area and the second electrode part conduction connect
It connects.
3. cable sheath protective device according to claim 2, which is characterized in that the first electrode contact area and institute
Stating second electrode contact area is respectively the conductive coating being electrically connected with the first electrode part and the second electrode part.
4. cable sheath protective device according to claim 2, which is characterized in that the first electrode part is cylindrical rod,
The second electrode part is to be sheathed on the first electrode part outside and the cylinder concentric with the first electrode part, first electricity
Pole contact area is the circular cross section of first electrode part exposure, and the second electrode contact area is the second electrode
The circular cylindrical cross-section of part.
5. cable sheath protective device according to claim 1, which is characterized in that each protector is independent and close
Envelope is set in each installs case.
6. cable sheath protective device according to claim 1, which is characterized in that the installs case includes cabinet, lid
And sealing element, the lid, which removably covers, sets the cabinet, and the sealing element is sealed at the cabinet and the lid
Between body.
7. cable sheath protective device according to claim 6, which is characterized in that the cabinet includes bottom wall and by described
The side wall that bottom wall outer rim extends to form in the same direction, the bottom wall and the side wall are enclosed accommodating chamber open at one end,
The first electrode mating area and the second electrode mating area are both formed in the bottom wall, and the first electrode cooperates
Region and the second electrode mating area include the first conducting surface towards the accommodating chamber and are exposed to outside the bottom wall
The second conducting surface.
8. cable sheath protective device according to claim 7, which is characterized in that the first electrode mating area is to set
It is placed in the border circular areas of the bottom wall central, the second electrode mating area is to be surrounded on outside the first electrode mating area
And the circle ring area being arranged concentrically with the first electrode mating area.
9. cable sheath protective device according to claim 6, which is characterized in that the lid and the cabinet screw thread connect
It connects.
10. cable sheath protective device according to claim 2, which is characterized in that the function element is is set to
State the piezoresistive wafer between first electrode part and the second electrode part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820871643.7U CN208335899U (en) | 2018-06-06 | 2018-06-06 | Cable sheath protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820871643.7U CN208335899U (en) | 2018-06-06 | 2018-06-06 | Cable sheath protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208335899U true CN208335899U (en) | 2019-01-04 |
Family
ID=64773584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820871643.7U Active CN208335899U (en) | 2018-06-06 | 2018-06-06 | Cable sheath protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208335899U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878083A (en) * | 2018-06-06 | 2018-11-23 | 广州供电局有限公司 | Cable sheath protective device and installation method |
-
2018
- 2018-06-06 CN CN201820871643.7U patent/CN208335899U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878083A (en) * | 2018-06-06 | 2018-11-23 | 广州供电局有限公司 | Cable sheath protective device and installation method |
| CN108878083B (en) * | 2018-06-06 | 2024-08-27 | 广东电网有限责任公司广州供电局 | Cable sheath protection device and installation method |
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Effective date of registration: 20200922 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |