CN111276828A - Lightning protection grounding body capable of preventing rainwater erosion - Google Patents
Lightning protection grounding body capable of preventing rainwater erosion Download PDFInfo
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- CN111276828A CN111276828A CN202010091764.1A CN202010091764A CN111276828A CN 111276828 A CN111276828 A CN 111276828A CN 202010091764 A CN202010091764 A CN 202010091764A CN 111276828 A CN111276828 A CN 111276828A
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- fixed
- grounding body
- bearing box
- temperature regulator
- body capable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T19/00—Devices providing for corona discharge
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- Plasma & Fusion (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention discloses a lightning protection grounding body capable of preventing rainwater erosion, which comprises a bearing box, a sealing ring and a limiting column, wherein supports are fixed on the left side and the right side of the bottom of the bearing box, a handle is fixed on the upper end face of a top cover, a temperature regulator is placed on the inner bottom of the bearing box, air outlet channels are arranged on the left side and the right side of the temperature regulator, the top of a limiting frame is fixed on a lug through a third bolt, the limiting column is fixed on the inner bottom of the bearing box, a second mounting hole is formed in the upper end face of the bearing plate, sleeve plates are fixed on the front side and the rear side of the bearing box through fifth bolts, and a hose penetrating opening is connected with a hose clamp. This can prevent lightning grounding body of rainwater erosion can hold the handle before installing the device and carry the device to required place to it is more convenient to make the removal operation, and the frame that keeps off the rain simultaneously can play the effect of keeping off the rain, prevents that the rainwater from entering into the device's inside and eroding lightning grounding body.
Description
Technical Field
The invention relates to the technical field of lightning protection grounding bodies, in particular to a lightning protection grounding body capable of preventing rainwater erosion.
Background
The lightning protection grounding is divided into two concepts, namely lightning protection is adopted to prevent damage caused by lightning stroke; and secondly, static grounding is used for preventing static from generating harm, along with increasingly wide application of cathode protection of the storage tank, the protection effect of the storage tank is more and more concerned by people, the contradiction between the lightning protection grounding specification and the cathode protection specification is more and more prominent, and a lightning protection grounding body is required to be used in the lightning protection grounding process.
The current lightning grounding body is after the installation, because the leakproofness that bears the box is not enough to easily lead to the lightning grounding body to receive the erosion of rainwater, thereby influence its life, and the lightning grounding body is at the in-process of work, and the temperature on its surface is difficult to adjust, thereby influences its permanent work, and it is convenient inadequately to use, to above-mentioned problem, needs improve current equipment.
Disclosure of Invention
The invention aims to provide a lightning protection grounding body capable of preventing rainwater erosion, and aims to solve the problems that after the existing lightning protection grounding body provided in the background art is installed, the sealing performance of a bearing box is insufficient, so that the lightning protection grounding body is easily eroded by rainwater, the service life of the lightning protection grounding body is influenced, and the long-term work of the lightning protection grounding body is influenced because the temperature of the surface of the lightning protection grounding body is difficult to adjust in the working process.
In order to achieve the purpose, the invention provides the following technical scheme: a lightning grounding body capable of preventing rainwater erosion comprises a bearing box, a sealing ring and a limiting column, wherein supports are fixed on the left side and the right side of the bottom of the bearing box, a first mounting hole is formed in the bottom of each support, a top cover is fixed on the top of the bearing box through a first bolt, a handle is fixed on the upper end face of the top cover, a rain shielding frame is fixed on the outer side of the top cover, a temperature regulator is placed at the inner bottom of the bearing box, an air inlet channel is arranged at the bottom of the temperature regulator and penetrates through the bottom of the bearing box, air outlet channels are arranged on the left side and the right side of the temperature regulator and penetrate through the bottom of the limiting frame, air outlet holes are formed in the limiting frame, the top of the limiting frame is fixed on a convex block through a third bolt, the convex block is fixed on the inner wall of the bearing box, the limiting column is fixed on the inner bottom of the, and the limiting column penetrates through the bearing plate to be connected with the first nut and the second nut, the second nut and the first nut are arranged on the upper side and the lower side of the bearing plate respectively, the second mounting hole is formed in the upper end face of the bearing plate, the lower side of the bearing plate is provided with the compression spring, the bottom of the compression spring is fixed on the temperature regulator through the fourth bolt, sleeve plates are fixed to the front side and the rear side of the bearing box through the fifth bolt, a hose is fixed to the inner side of each sleeve plate, the hose penetrates through an opening to be connected with the hose hoop, and the opening is formed in the front end face and the rear end face of the bearing box.
Preferably, the first mounting holes are distributed on the bracket at equal intervals, and the bracket is symmetrically arranged.
Preferably, the sealing ring is arranged between the bearing box and the top cover, the sealing ring is clamped and connected with the bearing box and the top cover, and first bolts are uniformly distributed on the top cover.
Preferably, the bottom of the temperature regulator is connected with the groove in a clamping manner, the groove is formed in the inner bottom of the bearing box, and air inlet channels are uniformly distributed on the temperature regulator.
Preferably, a filter cover is arranged on the outer side of the air inlet channel, and the filter cover is connected to the bottom of the bearing box through a second bolt in a threaded mode.
Preferably, the air outlet channel is connected with the limiting frame in a clamping manner, and the air outlet channel is inverted L-shaped "
The structure is the same, and air outlet holes are uniformly distributed on the limiting frame.
Preferably, the first nut, the second nut and the limiting columns are in threaded connection, four limiting columns are arranged, and the four limiting columns are symmetrically arranged about a vertical central axis of the bearing box.
Preferably, the bearing plate and the temperature regulator form a telescopic structure through a compression spring, and second mounting holes are uniformly distributed on the bearing plate.
Preferably, the hose and the pipe clamp are symmetrically arranged.
Compared with the prior art, the invention has the beneficial effects that: the lightning protection grounding body can prevent rain erosion,
(1) the device is provided with a bracket and a first mounting hole, the bracket can be fixed at a required place through the first mounting hole and an external bolt, so that the mounting work of the device is facilitated, and the bracket plays a certain role in supporting the bearing box;
(2) the lightning protection grounding body can be fixed on the bearing plate through the second mounting hole and an external bolt, the placing height of the bearing plate can be adjusted according to the size of the lightning protection grounding body in the process of mounting the lightning protection grounding body, the compression spring plays a supporting role for the bearing plate, the bearing plate can be fixed by screwing the first nut and the second nut after the position of the bearing plate is determined, and the lightning protection grounding body can be fixed accordingly;
(3) the anti-thunder grounding body is provided with a hose and a pipe hoop, after the anti-thunder grounding body is installed, the external connecting device can penetrate through the hose to be connected with the anti-thunder grounding body, and then the pipe hoop is screwed until the hose is tightly attached to the surface of the external connecting device, so that the sealing and isolating effects are achieved;
(4) the device is provided with a top cover, a first bolt, a sealing ring, a lifting handle and a rain shielding frame, wherein the top cover can be covered and the first bolt is screwed tightly after the installation and connection work is finished, so that the top cover is fixed, the sealing ring can play a role in strengthening the connection between the top cover and the bearing box, the lifting handle can be held by a hand before the device is installed to carry the device to a required place, so that the moving operation is more convenient, meanwhile, the rain shielding frame can play a role in shielding rain, and rainwater is prevented from entering the device to corrode a lightning protection grounding body;
(5) be provided with temperature regulator, the lightning protection grounding body is at the in-process of work, and the temperature that the box was inside is born in the temperature regulator is adjustable to make the lightning protection grounding body work under suitable temperature all the time, and the processing of can be better dampproofing carrying on.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic side view of the cross-sectional structure of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 6 is an enlarged view of the structure at B in FIG. 2 according to the present invention.
In the figure: 1. bearing box, 2, support, 3, first mounting hole, 4, top cap, 5, first bolt, 6, sealing washer, 7, handle, 8, rain-proof frame, 9, recess, 10, temperature regulator, 11, inlet channel, 12, filter mantle, 13, second bolt, 14, outlet channel, 15, spacing frame, 16, outlet hole, 17, third bolt, 18, lug, 19, spacing post, 20, first nut, 21, loading board, 22, second nut, 23, second mounting hole, 24, compression spring, 25, fourth bolt, 26, lagging, 27, fifth bolt, 28, hose, 29, opening, 30, ferrule.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a lightning grounding body capable of preventing rain erosion is disclosed, according to the figure 1 and figure 2, the left and right sides of the bottom of the bearing box 1 are fixed with the bracket 2, and the bottom of the bracket 2 is provided with a first mounting hole 3, meanwhile, the top of the bearing box 1 is fixed with a top cover 4 through a first bolt 5, the first mounting holes 3 are distributed on the bracket 2 at equal intervals, and the brackets 2 are symmetrically arranged, the brackets 2 can be fixed at a required place under the action of the first mounting holes 3 and external bolts, the installation is convenient, the first mounting holes 3 distributed at equal intervals can enable the bracket 2 to be placed more stably, the sealing ring 6 is connected with the bearing box 1 and the top cover 4 in a clamping way, and evenly distributed has first bolt 5 on top cap 4, screws up first bolt 5 and can install top cap 4 on bearing box 1, and sealing washer 6 can strengthen bearing box 1 and the top cap 4 between be connected, conveniently strengthens the device's leakproofness.
According to the drawings of fig. 1, 2 and 3, a handle 7 is fixed on the upper end face of a top cover 4, a rain shielding frame 8 is fixed on the outer side of the top cover 4, a temperature regulator 10 is placed at the inner bottom of a bearing box 1, an air inlet channel 11 is arranged at the bottom of the temperature regulator 10, the air inlet channel 11 penetrates through the bottom of the bearing box 1, the temperature regulator 10 is connected with the bearing box 1 in a clamping manner, the air inlet channels 11 are uniformly distributed on the temperature regulator 10, the temperature regulator 10 can regulate the temperature inside the bearing box 1 according to the working condition of the lightning protection grounding body, air is uniformly discharged through the air inlet channel 11, the lightning protection grounding body is always at a proper temperature, the lightning protection grounding body is convenient to use for a long time, in the air inlet process, a filter cover 12 can isolate dust in the air and prevent the dust from entering the device, after the working is finished, a second bolt 13 is taken down, the filter cover 12 can be detached for cleaning, for the next use.
According to fig. 1, fig. 2, fig. 3 and fig. 4 show, the left and right sides of temperature regulator 10 all is provided with air outlet channel 14, and air outlet channel 14 runs through the bottom of spacing frame 15, air outlet 16 has been seted up on spacing frame 15 simultaneously, be connected for the block between air outlet channel 14 and the spacing frame 15, and air outlet channel 14 is "L" shape structure of falling, air outlet channel 14 symmetry sets up simultaneously, it can fix spacing frame 15 on lug 18 to screw up third bolt 17, spacing frame 15 plays spacing effect to air outlet channel 14, and convenient follow-up work of obtaining the exhaust, air outlet 16 evenly distributed is on spacing frame 15, evenly distributed's air outlet 16 can make the effect of giving vent to anger more comprehensive even.
As shown in fig. 1, 2, 3 and 5, the top of the position-limiting frame 15 is fixed on the projection 18 by the third bolt 17, the convex block 18 is fixed on the inner wall of the bearing box 1, the limit column 19 is fixed at the inner bottom of the bearing box 1, and the spacing post 19 penetrates the bearing plate 21 to be connected with the first nut 20 and the second nut 22, meanwhile, the second nuts 22 and the first nuts 20 are respectively arranged at the upper side and the lower side of the bearing plate 21, the first nuts 20 and the second nuts 22 are in threaded connection with the limiting columns 19, four limiting columns 19 are arranged, meanwhile, the four limiting columns 19 are symmetrically arranged about the vertical central axis of the bearing box 1, the limiting columns 19 limit the bearing plate 21, and after the position of the bearing plate 21 is determined, the first nut 20 and the second nut 22 are tightened to fix the carrier plate 21, and the lightning protection grounding body is fixed accordingly, and the first nut 20 and the second nut 22 can respectively support and limit the lightning grounding body.
According to the drawings of fig. 1, fig. 2, fig. 5 and fig. 6, the upper end face of the bearing plate 21 is provided with a second mounting hole 23, the lower side of the bearing plate 21 is provided with a compression spring 24, the bottom of the compression spring 24 is fixed on the temperature regulator 10 through a fourth bolt 25, the bearing plate 21 and the temperature regulator 10 form a telescopic structure through the compression spring 24, the bearing plate 21 is uniformly distributed with the second mounting holes 23, the placing height of the bearing plate 21 can be adjusted according to the size of the lightning protection grounding body after the lightning protection grounding body is installed on the bearing plate 21 until the lightning protection grounding body is completely positioned in the bearing box 1, the compression spring 24 can support the bearing plate 21, the front side and the rear side of the bearing box 1 are both fixed with sleeve plates 26 through fifth bolts 27, the inner sides of the sleeve plates 26 are fixed with hoses 28, the hoses 28 penetrate through openings 29 to be connected with pipe hoops 30, and the openings 29 are arranged on the front end face and, the hose 28 and the pipe clamp 30 are symmetrically arranged, and the external connecting device penetrates through the hose 28 to be connected with the lightning protection grounding body, and then the pipe clamp 30 is screwed, so that rainwater is prevented from entering the device to corrode the lightning protection grounding body.
The working principle is as follows: when the lightning protection grounding body capable of preventing rain erosion is used, firstly, the handle 7 is held by hand to move the device to a required place, then the bracket 2 is fixed on the ground under the action of the first mounting hole 3 and the external bolt, the external power supply is connected, the first bolt 5 is taken down, the top cover 4 is detached, then the lightning protection grounding body is installed on the bearing plate 21 under the action of the second mounting hole 23 and the external bolt, meanwhile, the placing height of the bearing plate 21 is adjusted according to the size of the lightning protection grounding body, the bearing plate 21 is supported by the compression spring 24, the first nut 20 and the second nut 22 are screwed after the position of the bearing plate 21 is determined, the bearing plate 21 is fixed, the lightning protection grounding body is fixed, then, the external connecting device penetrates through the hose 28 to be connected with the lightning protection grounding body, and then the hose clamp 30 is screwed, so that the hose 28 is tightly attached to the surface of the external connecting device, therefore, the effect of sealing and isolation is achieved, then the first bolt 5 is screwed down, the top cover 4 is fixed to the top of the bearing box 1, the rain shielding frame 8 can play a role of shielding rain, the sealing ring 6 can play a role of enhancing sealing performance, then the temperature regulator 10 is started, the model of the temperature regulator 10 is XM-t331, air enters the temperature regulator 10 through the air inlet channel 11, after the temperature of the air is regulated, the air is discharged through the air outlet channel 14 and the air outlet hole 16 in sequence, so that the lightning protection grounding body always works at a proper temperature, in the air inlet process, the filter cover 12 can isolate dust in the air, after the work is finished, the second bolt 13 is taken down, the filter cover 12 can be detached, and the cleaning is convenient, and the content which is not described in detail in the description belongs to the prior art which is known by professional technicians in the field.
The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for simplicity of description only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be considered limiting of the claimed invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a can prevent lightning grounding body of rainwater erosion, includes bears box (1), sealing washer (6) and spacing post (19), its characterized in that: the left side and the right side of the bottom of the bearing box (1) are both fixed with a support (2), the bottom of the support (2) is provided with a first mounting hole (3), the top of the bearing box (1) is fixed with a top cover (4) through a first bolt (5), the upper end face of the top cover (4) is fixed with a handle (7), the outer side of the top cover (4) is fixed with a rain shielding frame (8), the inner bottom of the bearing box (1) is provided with a temperature regulator (10), the bottom of the temperature regulator (10) is provided with an air inlet channel (11), the air inlet channel (11) penetrates through the bottom of the bearing box (1), the left side and the right side of the temperature regulator (10) are both provided with air outlet channels (14), the air outlet channels (14) penetrate through the bottom of a limiting frame (15), the limiting frame (15) is provided with air outlet holes (16), the top of the limiting frame (15) is fixed on a convex block (18) through a third bolt (17), the bump (18) is fixed on the inner wall of the bearing box (1), the limiting column (19) is fixed at the inner bottom of the bearing box (1), the limiting column (19) penetrates through the bearing plate (21) to be connected with the first nut (20) and the second nut (22), the second nut (22) and the first nut (20) are respectively arranged on the upper side and the lower side of the bearing plate (21), the upper end face of the bearing plate (21) is provided with a second mounting hole (23), the lower side of the bearing plate (21) is provided with a compression spring (24), the bottom of the compression spring (24) is fixed on the temperature regulator (10) through a fourth bolt (25), sleeve plates (26) are fixed on the front side and the rear side of the bearing box (1) through fifth bolts (27), a hose (28) is fixed on the inner side of the sleeve plates (26), and the hose (28) penetrates through an opening (29) to be connected with a hose clamp (30), and the openings (29) are arranged on the front end surface and the rear end surface of the bearing box (1).
2. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: the first mounting holes (3) are distributed on the support (2) at equal intervals, and the support (2) is symmetrically arranged.
3. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: sealing washer (6) set up and bear between box (1) and top cap (4), and sealing washer (6) with bear and be the block connection between box (1) and top cap (4), evenly distributed has first bolt (5) simultaneously on top cap (4).
4. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: the bottom of the temperature regulator (10) is connected with the groove (9) in a clamping mode, the groove (9) is formed in the inner bottom of the bearing box (1), and meanwhile air inlet channels (11) are uniformly distributed on the temperature regulator (10).
5. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: and a filter cover (12) is arranged on the outer side of the air inlet channel (11), and the filter cover (12) is connected to the bottom of the bearing box (1) through a second bolt (13) in a threaded manner.
6. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: the air outlet channel (14) is connected with the limiting frame (15) in a clamping mode, the air outlet channel (14) is of an inverted L-shaped structure, and air outlet holes (16) are uniformly distributed in the limiting frame (15).
7. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: the first nut (20), the second nut (22) and the limiting columns (19) are in threaded connection, four limiting columns (19) are arranged, and the four limiting columns (19) are symmetrically arranged about a vertical central axis of the bearing box (1).
8. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: the bearing plate (21) and the temperature regulator (10) form a telescopic structure through a compression spring (24), and second mounting holes (23) are uniformly distributed in the bearing plate (21).
9. A lightning grounding body capable of preventing rain erosion according to claim 1, wherein: the hose (28) and the pipe clamp (30) are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091764.1A CN111276828B (en) | 2020-02-13 | 2020-02-13 | Lightning protection grounding body capable of preventing rainwater erosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091764.1A CN111276828B (en) | 2020-02-13 | 2020-02-13 | Lightning protection grounding body capable of preventing rainwater erosion |
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| Publication Number | Publication Date |
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| CN111276828A true CN111276828A (en) | 2020-06-12 |
| CN111276828B CN111276828B (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010091764.1A Active CN111276828B (en) | 2020-02-13 | 2020-02-13 | Lightning protection grounding body capable of preventing rainwater erosion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229791A (en) * | 2020-09-23 | 2021-01-15 | 南京电力设计研究院有限公司 | Grounding body underground device for detecting corrosion degree in real time |
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| US7341475B2 (en) * | 2004-01-07 | 2008-03-11 | At & T Delaware Intellectual Property, Inc. | Ground rod cap |
| CN206611055U (en) * | 2017-03-29 | 2017-11-03 | 杨雪飞 | A kind of anti-lightning strike moistureproof distribution box |
| CN207183563U (en) * | 2017-07-06 | 2018-04-03 | 深圳市瑞昌电力技术有限公司 | A kind of earthing or grounding means |
| CN207303392U (en) * | 2017-08-11 | 2018-05-01 | 常鹏舞 | A kind of electric power grounding-for-lightning device |
| CN209545768U (en) * | 2019-04-10 | 2019-10-25 | 中睿通信规划设计有限公司 | A kind of mobile base station lightning protection device |
| CN209880843U (en) * | 2019-06-04 | 2019-12-31 | 苏州旭涵电力设备有限公司 | Corrosion-resistant lightning grounding body |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7341475B2 (en) * | 2004-01-07 | 2008-03-11 | At & T Delaware Intellectual Property, Inc. | Ground rod cap |
| CN206611055U (en) * | 2017-03-29 | 2017-11-03 | 杨雪飞 | A kind of anti-lightning strike moistureproof distribution box |
| CN207183563U (en) * | 2017-07-06 | 2018-04-03 | 深圳市瑞昌电力技术有限公司 | A kind of earthing or grounding means |
| CN207303392U (en) * | 2017-08-11 | 2018-05-01 | 常鹏舞 | A kind of electric power grounding-for-lightning device |
| CN209545768U (en) * | 2019-04-10 | 2019-10-25 | 中睿通信规划设计有限公司 | A kind of mobile base station lightning protection device |
| CN209880843U (en) * | 2019-06-04 | 2019-12-31 | 苏州旭涵电力设备有限公司 | Corrosion-resistant lightning grounding body |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229791A (en) * | 2020-09-23 | 2021-01-15 | 南京电力设计研究院有限公司 | Grounding body underground device for detecting corrosion degree in real time |
| CN112229791B (en) * | 2020-09-23 | 2023-01-03 | 南京电力设计研究院有限公司 | Grounding body underground device for detecting corrosion degree in real time |
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| CN111276828B (en) | 2021-03-26 |
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