CN220139210U - Cable tunnel structure for ultrahigh voltage leading - Google Patents
Cable tunnel structure for ultrahigh voltage leading Download PDFInfo
- Publication number
- CN220139210U CN220139210U CN202320980488.3U CN202320980488U CN220139210U CN 220139210 U CN220139210 U CN 220139210U CN 202320980488 U CN202320980488 U CN 202320980488U CN 220139210 U CN220139210 U CN 220139210U
- Authority
- CN
- China
- Prior art keywords
- cable
- tunnel
- high voltage
- ultra
- fixing
- 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.)
- Active
Links
- 238000010276 construction Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model provides a cable tunnel structure for ultrahigh voltage lead-up, which comprises an ultrahigh voltage cable, a cable tunnel, a cable terminal station, a cable fixing assembly and a plurality of cable terminals, wherein the cable terminal station and the plurality of cable terminals are arranged on the ground, the cable tunnel is arranged below the ground and extends to the lower parts of the cable terminal station and the plurality of cable terminals, the cable tunnel comprises a tunnel main body and a plurality of extending positions, the extending positions are arranged at the top of the tunnel main body and correspond to the plurality of cable terminals one by one, and the ultrahigh voltage cable completes turns in the tunnel main body and the extending positions and then upwards passes out of the extending positions to be connected into the cable terminals.
Description
Technical Field
The utility model belongs to the technical field of cable tunnels, and particularly relates to a cable tunnel structure for ultrahigh voltage lead-up.
Background
In recent years, with the rapid development of cities and the rapid expansion of urban edges, urban power load demands are increasing. The large-scale construction of the ultra-high voltage and extra-high voltage overhead lines distributed on the periphery of the city relieves the power supply requirement of the city, but the high voltage overhead lines influence the urban appearance of the city, occupy a large power transmission channel and limit the development of the city. Therefore, the demand for high-voltage power cables around cities is increasing, and the construction of auxiliary facilities for power cables such as cable tunnels and the like is being advanced with great force.
A cable tunnel is a tunnel structure for accommodating a large number of cables laid on cable brackets. The cable tunnel not only can enable the cable to be better protected and prevent the cable from being damaged by wind and sun, but also can be beneficial to overhauling and maintaining of operation and maintenance personnel, a relatively independent operation space is created, and the operation safety of a cable line is improved.
When the cable tunnel enters the cable terminal station, the cable tunnel and the cable are positioned below the ground, the cable terminal station and the cable terminal are positioned above the ground, when the cable is led to be connected with the cable terminal, the cable needs to meet the requirement of turning radius when climbing, and the cable needs to be continuously fixed at intervals of about 1m in straight line segments right below the cable terminal, so that the cable tunnel layer is overhigh, and the construction cost is increased.
Disclosure of Invention
The embodiment of the utility model provides a cable tunnel structure for ultra-high voltage lead, which is characterized in that an extension position corresponding to a cable terminal is arranged at the top of a tunnel main body, an ultra-high voltage cable completes a turn in the tunnel main body and the extension position, and then the ultra-high voltage cable upwards passes out of the extension position to be connected with the cable terminal. The utility model solves the problems of high engineering cost caused by overhigh cable tunnel layer height in order to meet the space required by cable turning and continuous fixing of the existing cable tunnel.
The embodiment of the utility model provides a cable tunnel structure for ultrahigh voltage lead, which comprises an ultrahigh voltage cable, a cable tunnel, a cable terminal station, a cable fixing assembly and a plurality of cable terminals;
the cable terminal station and the plurality of cable terminals are arranged on the ground, the cable tunnel is arranged below the ground, and the cable tunnel extends to the lower parts of the cable terminal station and the plurality of cable terminals;
the cable tunnel comprises a tunnel main body and a plurality of extending positions, wherein the extending positions are arranged at the top of the tunnel main body and correspond to the cable terminals one by one;
the extra-high voltage cable is arranged in the cable tunnel, the end part of the extra-high voltage cable penetrates out of the extending position and is connected to the cable terminal, and the extra-high voltage cable turns in the tunnel main body and the extending position.
In a possible implementation manner, the cable tunnel structure for ultra-high voltage lead-up further comprises a plurality of fixing components, wherein the fixing components are arranged in the tunnel main body and are used for fixing the ultra-high voltage cable;
the fixing assembly comprises a cable support and a cable clamp, the cable support is fixedly arranged on the inner wall of the tunnel main body, the cable clamp is fixedly arranged on the cable support, and the cable clamp clamps the ultrahigh voltage cable.
In one possible implementation, the cable bracket includes a fixing seat, a fixing frame and a telescopic frame;
the fixing seat is provided with a first connecting surface and a second connecting surface which are opposite, the first connecting surface is an arc surface, the fixing seat is fixed in the cable tunnel, and the first connecting surface is attached to the inner wall of the cable tunnel;
the end part of the fixing frame is fixedly arranged on the second connecting surface, a plurality of first through holes are formed in the fixing frame, a plurality of second through holes matched with the first through holes are formed in the telescopic frame, and a screw rod penetrates through the first through holes and the second through holes so that the fixing frame and the telescopic frame are fixedly connected;
the cable clamp is fixedly arranged on the telescopic frame.
In one possible implementation manner, the fixing frame is provided with an open chute, and the telescopic frame is slidably connected with the open chute.
In one possible implementation, the cable clamp includes a connecting plate, a rotating shaft, a lower clamping plate, and an upper clamping plate;
the connecting plate is fixedly arranged on the telescopic frame, and two ends of the rotating shaft are respectively connected with the connecting plate and the lower clamping plate in a rotating way;
the lower clamping plate is arranged opposite to the upper clamping plate and detachably connected through a screw, and a plurality of first clamping grooves and a plurality of second clamping grooves are respectively and oppositely arranged on opposite surfaces of the lower clamping plate and the upper clamping plate.
In a possible implementation manner, the inner walls of the first clamping groove and the second clamping groove are respectively provided with a first elastic pad and a second elastic pad.
In one possible implementation, two loops of the extra-high voltage cable are arranged in the cable tunnel, and the two loops of the extra-high voltage cable are arranged on the same bin in the cable tunnel.
In one possible implementation, the extra-high voltage cable is a 330kV extra-high voltage cable.
The cable tunnel structure comprises a tunnel main body and a plurality of extending positions, wherein the extending positions are arranged at the top of the tunnel main body and correspond to the cable terminals one by one, the ultrahigh-voltage cable completes turning in the tunnel main body and the extending positions, and then passes upwards out of the extending positions to be connected with the cable terminals. The utility model solves the problems of high engineering cost caused by overhigh cable tunnel layer height in order to meet the space required by cable turning and continuous fixing of the existing cable tunnel.
Drawings
Fig. 1 is a schematic structural diagram of a cable tunnel structure for ultra-high voltage lead-up provided by the utility model;
FIG. 2 is a schematic view of the cable tunnel and its connection structure in FIG. 1;
FIG. 3 is a schematic view of a fastening assembly according to the present utility model;
fig. 4 is a schematic structural view of the cable clamp provided by the utility model.
Reference numerals illustrate:
1-an ultra-high voltage cable; 2-cable tunnel; 3-a cable end station; 4-a cable support; 5-a cable clamp; 6-cable termination;
210-a tunnel body; 220-extended position; 410-fixing base; 420-fixing frame; 430-telescoping rack; 510-connecting plates; 520-rotating shaft; 530-lower clamping plate; 540-upper clamping plate;
421-first via; 422-open runner; 431-a second through hole; 531-first clip groove; 532-a first resilient pad; 541-a second clip groove; 542-second resilient pad.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
The cable tunnel is used for accommodating underground structures with a large number of cables, channels for installation and inspection and totally-enclosed structures, when the cables are led to be connected with cable terminals located on the ground, the requirements of turning radius are required to be met when the cables climb in the tunnel, and the cables are required to be continuously fixed at intervals of about 1m in straight line segments right below the cable terminals, so that the cable tunnel layer is too high, and the construction cost is increased.
According to the cable tunnel structure for the ultra-high voltage lead, the protruding position 220 corresponding to the cable terminal 6 is arranged at the top of the tunnel main body 210, the ultra-high voltage cable 1 completes turning in the tunnel main body 210 and the protruding position 220, and then the ultra-high voltage cable passes through the protruding position 220 upwards to be connected with the cable terminal 6.
The specific structure of the on-line detection system provided by the utility model is described in detail below with reference to the accompanying drawings.
Referring to fig. 1-2, an embodiment of the present utility model provides a cable tunnel structure for ultra-high voltage lead-up, including an ultra-high voltage cable 1, a cable tunnel 2, a cable end station 3, a cable fixing assembly, and a plurality of cable terminals 6;
the cable terminal station 3 is composed of a plurality of cable terminals 6, GIS cable terminal equipment, lightning rods, towers and other equipment, and the cable terminal station 3 and the cable terminals 6 are arranged on the ground; the cable tunnel 2 is arranged under the ground, the cable tunnel 2 can be connected with a plurality of cable end stations 3, and the cable tunnel 2 extends to the lower parts of a plurality of cable terminals 6;
as shown in fig. 2, the cable tunnel 2 includes a tunnel body 210 and a plurality of protruding positions 220, the tunnel body 210 may be a conventional circular tunnel, the plurality of protruding positions 220 are all disposed at the top of the tunnel body 210, the protruding positions 220 may be cylindrical or rectangular, preferably rectangular, and the length direction of the rectangular protruding positions 220 is consistent with the extending direction of the ultra-high voltage cable 1, and the plurality of protruding positions 220 are in one-to-one correspondence with the plurality of cable terminals 6;
the extra-high voltage cable 1 is arranged in the cable tunnel 2, the end part of the extra-high voltage cable 1 penetrates out of the extending position 220 and is connected with the cable terminal 6, and the extra-high voltage cable 1 turns in the tunnel main body 210 and the extending position 220;
the height of the tunnel main body 210 is lower than that of the existing cable tunnel, the height of the tunnel main body 210 does not meet the height required by turning of the ultra-high voltage cable 1, therefore, an extension position 220 is arranged at the turning position of the ultra-high voltage cable 1, namely, the extension position 220 is arranged at the lower part of the cable terminal 6, so that the ultra-high voltage cable 1 turns in the tunnel main body 210 and the extension position 220, extends upwards for a certain length, and then penetrates out to be connected with the cable tunnel 2 and the cable terminal 6 positioned on the ground, so that the engineering cost of the cable tunnel 2 is reduced while the required height required by turning of the ultra-high voltage cable 1 is met by the cable tunnel 2.
According to the cable tunnel structure for ultrahigh voltage lead provided by the embodiment of the utility model, the cable terminal station 3 and the plurality of cable terminals 6 are arranged on the ground, the cable tunnel 2 is arranged under the ground, the cable tunnel 2 extends to the lower parts of the cable terminal station 3 and the plurality of cable terminals 6, the cable tunnel 2 comprises the tunnel main body 210 and the plurality of extending positions 220, the plurality of extending positions 220 are arranged at the top of the tunnel main body 210 and correspond to the plurality of cable terminals 6 one by one, the ultrahigh voltage cable 1 completes turning in the tunnel main body 210 and the extending positions 220, and then passes out of the extending positions 220 upwards to be connected with the cable terminals 6. The utility model solves the problems of high engineering cost caused by overhigh cable tunnel layer height in order to meet the space required by cable turning and continuous fixing of the existing cable tunnel.
Referring to fig. 1 and 2, in some embodiments, the cable tunnel structure for ultra-high voltage lead-up further includes a plurality of fixing assemblies, each of which is disposed in the tunnel body 210, each of which is used to fix the ultra-high voltage cable 1;
the fixed subassembly includes cable support 4 and cable clamp 5, and cable support 4 sets firmly in the inner wall of tunnel main part 210, and cable clamp 5 sets firmly on cable support 4, and cable clamp 5 centre gripping superhigh pressure cable 1, through the fixed superhigh pressure cable 1 of a plurality of cable support 4 and a plurality of cable clamp 5 cooperation, guarantees superhigh pressure cable 1 safe and stable operation.
In some embodiments, a two-circuit extra-high voltage cable 1 is arranged in the cable tunnel 2, the two-circuit extra-high voltage cable 1 is arranged on the same bin in the cable tunnel 2, and the extra-high voltage cable 1 is a 330kV extra-high voltage cable.
Referring to fig. 2 and 3, in some embodiments, the cable support 4 includes a fixing base 410, a fixing frame 420, and a telescopic frame 430;
the fixing base 410 has a first connecting surface and a second connecting surface opposite to each other, the first connecting surface is an arc surface or a plane, a plurality of fixing through holes are formed in the fixing base 410, and the fixing base 410 can be fixed on the inner wall of the tunnel main body 210 or the protruding position 220 by a plurality of screws; when the first connection surface is a cambered surface, the radian of the cambered surface is matched with the inner wall of the tunnel main body 210, and the fixing through hole penetrates through the lowest point of the cambered surface, so that the connection area of the first connection surface and the tunnel main body 210 is ensured, and the fixing stability of the fixing seat 410 is ensured;
the fixing frame 420 and the telescopic frame 430 are of long plate-shaped structures, the bottom end of the fixing frame 420 is fixedly arranged on the second connecting surface, a plurality of first through holes 421 are formed in the fixing frame 420, a plurality of second through holes 431 matched with the first through holes 421 are formed in the telescopic frame 430, a screw penetrates through the first through holes 421 and the second through holes 431, the fixing frame 420 and the telescopic frame 430 are fixedly connected, the cable clamp 5 is fixedly arranged on the telescopic frame 430, different first through holes 421 and second through holes 431 are connected through the screw, and therefore the overall height of the fixing frame 420 and the telescopic frame 430 is adjusted, and further the cable fixing of a plurality of different laying heights is met.
In some embodiments, an open chute 422 is provided on the fixing frame 420, two L-shaped clamping plates are provided at the front and rear ends of the left side of the fixing frame 420, a concave open chute 422 is formed between the two L-shaped clamping plates, and the telescopic frame 430 is slidably connected with the open chute 422, so that the telescopic frame 430 can only slide up and down, thereby facilitating adjustment of the cable support 4.
Referring to fig. 3 and 4, in some embodiments, the cable clamp 5 includes a connection plate 510, a rotation shaft 520, a lower clamping plate 530, and an upper clamping plate 540;
the connecting plate 510 is a rectangular plate body, a plurality of through holes matched with the second through holes 431 are formed in the connecting plate 510, the connecting plate 510 can be detachably fixed on the expansion bracket 430 through bolts, and two ends of the rotating shaft 520 are respectively connected with the connecting plate 510 and the lower clamping plate 530 in a rotating way;
the lower clamping plate 530 and the upper clamping plate 540 are rectangular plates, the lower clamping plate 530 and the upper clamping plate 540 are oppositely arranged and detachably connected through a screw, and a plurality of first clamping grooves 531 and a plurality of second clamping grooves 541 are oppositely arranged on opposite surfaces of the lower clamping plate 530 and the upper clamping plate 540 respectively.
As shown in fig. 4, the opposite surfaces of the lower clamping plate 530 and the upper clamping plate 540 are respectively provided with three first clamping grooves 531 and three second clamping grooves 541, the first clamping grooves 531 and the second clamping grooves 541 are semicircular, the inner walls of the first clamping grooves 531 and the second clamping grooves 541 are respectively provided with a first elastic pad 532 and a second elastic pad 542, when the lower clamping plate 530 and the upper clamping plate 540 are fixed, the first clamping grooves 531 and the second clamping grooves 541 can hold cables, and the distance between the lower clamping plate 530 and the upper clamping plate 540 is adjusted by adjusting the tightness of the bolts, so that the cables with different models can be fixed conveniently; and, the connection plate 510 and the lower clamping plate 530 are rotatably connected through the rotation shaft 520, that is, the lower clamping plate 530 and the upper clamping plate 540 are rotatably connected with the cable bracket 4, thereby facilitating the fixation of the cable bending part.
It is to be understood that, based on the several embodiments provided in the present utility model, those skilled in the art may combine, split, reorganize, etc. the embodiments of the present utility model to obtain other embodiments, which all do not exceed the protection scope of the present utility model.
The foregoing detailed description of the embodiments of the present utility model further illustrates the purposes, technical solutions and advantageous effects of the embodiments of the present utility model, and it should be understood that the foregoing is merely a specific implementation of the embodiments of the present utility model, and is not intended to limit the scope of the embodiments of the present utility model, and any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present utility model should be included in the scope of the embodiments of the present utility model.
Claims (8)
1. A cable tunnel structure for on superhigh pressure draws, its characterized in that: the cable comprises an extra-high voltage cable (1), a cable tunnel (2), a cable terminal station (3), a cable fixing assembly and a plurality of cable terminals (6);
the cable terminal station (3) and the plurality of cable terminals (6) are arranged on the ground, the cable tunnel (2) is arranged below the ground, and the cable tunnel (2) extends to the lower parts of the cable terminal station (3) and the plurality of cable terminals (6);
the cable tunnel (2) comprises a tunnel main body (210) and a plurality of extending positions (220), wherein the extending positions (220) are arranged at the top of the tunnel main body (210), and the extending positions (220) are in one-to-one correspondence with the cable terminals (6);
the extra-high voltage cable (1) is arranged in the cable tunnel (2), the end part of the extra-high voltage cable (1) penetrates out of the extending position (220) and is connected into the cable terminal (6), and the extra-high voltage cable (1) turns in the tunnel main body (210) and the extending position (220).
2. The cable tunnel construction for ultra-high voltage applications according to claim 1, wherein:
the system further comprises a plurality of fixing assemblies, wherein the fixing assemblies are arranged in the tunnel main body (210) and are used for fixing the ultra-high voltage cable (1);
the fixing assembly comprises a cable support (4) and a cable clamp (5), the cable support (4) is fixedly arranged on the inner wall of the tunnel main body (210), the cable clamp (5) is fixedly arranged on the cable support (4), and the cable clamp (5) clamps the ultra-high voltage cable (1).
3. The cable tunnel construction for ultra-high voltage applications according to claim 2, wherein:
the cable support (4) comprises a fixed seat (410), a fixed frame (420) and a telescopic frame (430);
the fixing seat (410) is provided with a first connecting surface and a second connecting surface which are opposite, the first connecting surface is an arc surface, the fixing seat (410) is fixed in the cable tunnel (2), and the first connecting surface is attached to the inner wall of the cable tunnel (2);
the end part of the fixing frame (420) is fixedly arranged on the second connecting surface, a plurality of first through holes (421) are formed in the fixing frame (420), a plurality of second through holes (431) matched with the first through holes (421) are formed in the telescopic frame (430), and a screw rod penetrates through the first through holes (421) and the second through holes (431) so that the fixing frame (420) and the telescopic frame (430) are fixedly connected;
the cable clamp (5) is fixedly arranged on the telescopic frame (430).
4. A cable tunnel structure for ultra-high voltage applications according to claim 3, characterized in that:
the fixing frame (420) is provided with an open sliding groove (422), and the telescopic frame (430) is in sliding connection with the open sliding groove (422).
5. A cable tunnel structure for ultra-high voltage applications according to claim 3, characterized in that:
the cable clamp (5) comprises a connecting plate (510), a rotating shaft (520), a lower clamping plate (530) and an upper clamping plate (540);
the connecting plate (510) is fixedly arranged on the telescopic frame (430), and two ends of the rotating shaft (520) are respectively connected with the connecting plate (510) and the lower clamping plate (530) in a rotating way;
the lower clamping plate (530) and the upper clamping plate (540) are oppositely arranged and detachably connected through a screw, and a plurality of first clamping grooves (531) and a plurality of second clamping grooves (541) are respectively and oppositely arranged on opposite surfaces of the lower clamping plate (530) and the upper clamping plate (540).
6. The cable tunnel construction for ultra-high voltage applications as recited in claim 5, wherein:
the inner walls of the first clamping groove (531) and the second clamping groove (541) are respectively provided with a first elastic pad (532) and a second elastic pad (542).
7. The cable tunnel construction for ultra-high voltage applications according to claim 1, wherein:
the ultra-high voltage cable (1) is arranged in the cable tunnel (2) for two times, and the ultra-high voltage cable (1) is arranged in the cable tunnel (2) from top to bottom in the same bin.
8. The cable tunnel construction for ultra-high voltage applications according to claim 1, wherein:
the extra-high voltage cable (1) is a 330kV extra-high voltage cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320980488.3U CN220139210U (en) | 2023-04-27 | 2023-04-27 | Cable tunnel structure for ultrahigh voltage leading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320980488.3U CN220139210U (en) | 2023-04-27 | 2023-04-27 | Cable tunnel structure for ultrahigh voltage leading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220139210U true CN220139210U (en) | 2023-12-05 |
Family
ID=88954648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320980488.3U Active CN220139210U (en) | 2023-04-27 | 2023-04-27 | Cable tunnel structure for ultrahigh voltage leading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220139210U (en) |
-
2023
- 2023-04-27 CN CN202320980488.3U patent/CN220139210U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN220139210U (en) | Cable tunnel structure for ultrahigh voltage leading | |
| CN104821490A (en) | 500 kV HGIS power distribution device arrangement structure | |
| CN102545129A (en) | Large-section cable clamp | |
| CN209805370U (en) | Power line wire insulation protection device | |
| CN111864679B (en) | Electric power transmission overhead line cable isolating rod | |
| CN209313343U (en) | A kind of construction building cable bearer | |
| CN205791352U (en) | The 10kV switchgear house service drop combination fastener of antiseep | |
| CN210007228U (en) | insulating operating rod for transformer maintenance | |
| CN210466935U (en) | Power distribution network standardized transformer station teaching work instrument | |
| CN207166092U (en) | A kind of adjustable suspension bracket of enclosed busbar | |
| CN208618905U (en) | A kind of insulation electric pole of 10kV high-tension line | |
| CN205942038U (en) | Multipurpose leaky cable suspension clamp | |
| CN221126554U (en) | GIS cable terminal tail pipe lower part cable fixing ladder frame | |
| CN218828626U (en) | Box-type substation | |
| CN218102479U (en) | 500kV ultrahigh-voltage cable transition support for shaft mouth of hydroelectric engineering shaft | |
| CN218102436U (en) | 500kV ultrahigh-voltage cable support for hydroelectric engineering vertical well | |
| CN112260206B (en) | Low-voltage lightning arrester installing support | |
| CN216436763U (en) | Open-type cable branch station | |
| CN205212992U (en) | Open -air non -maintaining pin -connected panel wireless network relay | |
| CN215600991U (en) | A high tension cable installing support for electric power engineering | |
| CN211923749U (en) | Transmission line circulation crossing tower | |
| CN216564434U (en) | Waterproof intensive bus duct | |
| CN208046188U (en) | Cable fixed mount | |
| CN215498187U (en) | Line structure planning device of rural power grid | |
| CN221176929U (en) | Adjustable lightning arrester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |