CN111082234A - Permeation type grounding device - Google Patents
Permeation type grounding device Download PDFInfo
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- CN111082234A CN111082234A CN201911262903.6A CN201911262903A CN111082234A CN 111082234 A CN111082234 A CN 111082234A CN 201911262903 A CN201911262903 A CN 201911262903A CN 111082234 A CN111082234 A CN 111082234A
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- ground
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- grounding device
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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
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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Abstract
The utility model relates to a penetration earthing device, including ground connection downlead, ground conductor in the ground and the ground insulation container who is equipped with conducting solution, power equipment is connected to ground connection downlead one end, the other end extends into underground, ground conductor is the cavity pipe fitting of partly extension underground in the ground, ground conductor ground part in the ground with ground insulation container intercommunication, underground part with ground connection downlead is connected, ground conductor's underground part has seted up a plurality of infiltration holes, conducting solution warp in the ground insulation container ground conductor flows into underground in the ground. According to the invention, the soil conductivity of the whole grounding device is improved by permeating external conductive liquid through the grounding device permeation network, and short-circuit current can be rapidly and smoothly discharged into the ground through the conductive liquid permeation area.
Description
Technical Field
The application belongs to the field of power system grounding devices, and particularly relates to a penetration type grounding device.
Background
The quality of the grounding performance of the grounding device is important to the safe operation of the power system. When the power transmission and transformation project is in a ground short circuit, the short-circuit current is quite large, and when the system is in a ground short circuit fault or is struck by lightning, the local potential of the ground grid is lifted, so that the safety of personnel and equipment is greatly threatened.
According to the basic requirements of the design of the grounding grid, the lightning protection and grounding device not only ensures the safe operation of equipment, but also ensures the personal safety. The grounding grid provides a common reference ground for various electrical equipment in the station, fault current is quickly leaked into the ground when a power system fails, the maximum potential of the grounding grid is controlled to rise, and the safety of human bodies and equipment is guaranteed. However, in many cases, such as mountain areas and gobi, the grounding performance of the power transmission and transformation project is poor due to the geological structure of the soil, and the short-circuit current cannot be discharged into the ground quickly and smoothly, so that an electrical fault may occur due to the poor grounding performance of the grounding device. In general, in the case of this kind, engineers dig deep wells, lay large-scale ground flat irons, or bury resistance reducers to achieve the purpose of reducing the resistivity of the soil and further improving the performance of the ground parameters, but these have the disadvantages of huge engineering, unobvious resistance reducing effect, and the like.
Chinese patent CN201910054988.2 discloses a grounding module with ion slow release function, which comprises an inner container, wherein the inner container has a cavity, the cavity contains an ion slow release agent, the outer surface of the inner container is coated with a conductive braided layer, the surface of the inner container is provided with water-permeable micropores communicating the conductive braided layer and the cavity, and the particle size of the ion slow release agent is larger than the pore size of the water-permeable micropores. The grounding module is filled with an ion slow-release agent in a cavity of the inner container, and the ion slow-release agent permeates into soil through rainwater flowing through the water seepage micropores to achieve the slow-release effect, so that the resistivity of the soil is improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the penetration type grounding device is convenient to lay in various environments and has remarkable grounding performance effect.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a penetration earthing device, includes ground connection downlead, ground conductor and the ground insulation container who is equipped with conducting solution in the ground, power equipment is connected to ground connection downlead one end, the other end extends into underground, ground conductor is the cavity pipe fitting that the part extends into underground in the ground, ground conductor ground part in the ground with ground insulation container intercommunication, underground part with ground connection downlead is connected, ground conductor's underground part has seted up a plurality of infiltration holes, the conducting solution warp in the ground insulation container ground conductor flows into underground in the ground.
In one embodiment, the ground down conductor is a galvanized steel flat iron with a cross-sectional area not less than 6 square centimeters, and the ground conductor is a stainless steel hollow tube.
In one embodiment, the underground grounding conductor comprises a plurality of horizontal hollow pipes and vertical hollow pipes, the horizontal hollow pipes are buried underground in a staggered manner in a # -shape, the vertical hollow pipes vertically extend from the ground to the ground, the top of each vertical hollow pipe is communicated with the ground insulating container, and the bottom of each vertical hollow pipe is communicated with the corresponding horizontal hollow pipe.
In one embodiment, the diameter of the penetration holes is 0.3-0.6 cm, and the adjacent penetration holes are spaced 8-12 cm apart.
In one embodiment, the underground part of the hollow pipe fitting is tightly held and fixed by a plurality of metal hoops with flat tops, and the tops of the metal hoops are welded and fixed with one underground end of the grounding downlead.
In one embodiment, the underground part of the hollow pipe fitting is in an inverted T shape, and the metal hoops are distributed on the pipe body of the hollow pipe fitting at intervals.
In one embodiment, the above-ground part of the underground grounding conductor is wrapped by an insulating sheath, and the ground insulating container is made of insulating materials.
In one embodiment, the conductive solution is a sodium chloride solution.
In one embodiment, the ground insulation container is provided with a solution injection port.
In one embodiment, the underground grounding conductor extends into the underground to a depth of not less than 0.8 m.
The invention has the beneficial effects that: the penetration type grounding device changes the traditional galvanized steel flat iron grounding device into a hollow stainless steel grounding tube grounding device with penetration holes, improves the soil conductivity of the soil resistivity of the whole grounding device by using a penetration network of the grounding device through external conductive liquid, quickly and smoothly discharges short-circuit current into the ground through a conductive liquid penetration area, and can still realize the quick and smooth discharge of the short-circuit current into the ground in the remaining saline ion-containing soil environment even if the moisture in the conductive liquid is lost. The device greatly improves the soil characteristics of areas with high soil resistivity, and has obvious effect of improving the grounding performance of the grounding device.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a schematic diagram illustrating the operation of a permeable grounding device according to an embodiment of the present application;
fig. 2 is a schematic top view of a permeable grounding device according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "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 convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, a penetration type grounding device includes a down conductor 1, a ground conductor 2, and a ground insulation container 3 containing a conductive solution. One end of the grounding downlead 1 is connected with the electric equipment 4 to be grounded, and the other end of the grounding downlead extends downwards into the ground to a certain depth, so that the electric equipment 4 can be grounded by the grounding downlead 1. The underground grounding conductor 2 is a hollow pipe which partially extends into the ground, the part of the underground grounding conductor 2 on the ground is communicated with the ground insulation container 3, and the underground part of the underground grounding conductor 2 is connected with the underground part of the grounding down conductor 1. The conductive connection between the grounding downlead 1 and the underground grounding conductor 2 is realized, in order to further increase the grounding performance of the device, a plurality of penetration holes 5 are arranged on the underground part of the underground grounding conductor 2, and the conductive solution in the ground insulation container 3 flows into the underground through the underground grounding conductor 2. Specifically, the penetration holes 5 are located on the pipe wall of the hollow pipe fitting, the conductive solution is filled in the ground insulating container 3, then sequentially passes through the overground part and the underground part of the hollow pipe fitting, and finally penetrates into soil through the penetration holes 5, so that the effect of improving the resistivity of the soil is achieved. The laying design and the construction process of the penetration type grounding device of the embodiment are designed according to the standard substation grounding device, and are not repeated.
In one embodiment, the down conductor 1 is a galvanized steel flat iron with a cross-sectional area not less than 6 square centimeters to meet the system thermal stability checking calculation and prevent the down conductor from being easily fused. The underground grounding conductor 2 is a stainless steel hollow pipe, the stainless steel material is used for delaying corrosion by the soil environment as much as possible, and the sectional area of the pipe body also meets the requirement of system thermal stability checking calculation.
In order to further ensure the penetration effect and improve the penetration efficiency, in one embodiment, the underground grounding conductor 2 includes a plurality of horizontal hollow tubes and vertical hollow tubes, and referring to fig. 2, the horizontal hollow tubes are buried underground in a crisscross manner. The vertical hollow pipe vertically extends from the ground to the ground, the top of the vertical hollow pipe is communicated with the ground insulation container 3, and the bottom of the vertical hollow pipe is communicated with the horizontal hollow pipe.
In one embodiment, the diameter of the penetration holes 5 is 0.3-0.6 cm, and the adjacent penetration holes 5 are spaced 8-12 cm apart. As desired, in various embodiments, the penetration holes 5 have a diameter of 0.3 cm, 0.5 cm, or 0.6 cm, etc., adjacent penetration holes 5 are spaced 8 cm, 10 cm, or 12 cm, etc.,
in one embodiment, the pipe fitting further comprises a plurality of metal hoops 6 with flat tops, the metal hoops 6 tightly hold and fix the underground part of the hollow pipe fitting, and the tops of the metal hoops 6 are welded and fixed with the underground end of the grounding down conductor 1, so that the hollow pipe fitting and the grounding down conductor 1 are tightly connected, fixed and electrically communicated. In one embodiment, the underground part of the hollow pipe fitting is in an inverted T shape, and the metal hoops 6 are distributed at intervals on the pipe body of the hollow pipe fitting which is horizontally arranged.
In order to prevent the damage of the contact voltage to human bodies and equipment, in one embodiment, the ground part of the underground grounding conductor 2 is wrapped by an insulating sheath 7, the insulating sheath 7 is a composite insulating sheath, and the ground insulating container 3 is also made of insulating materials. In one embodiment, the conductive solution is a sodium chloride solution, and the sodium chloride solution has the advantages of good conductivity and no pollution.
In order to facilitate the addition of the conductive solution, in one embodiment, the ground insulating container 3 is provided with a solution injection port.
By means of regular manual injection, a well-conducting, low-environmental impact solution, such as a sodium chloride solution, is injected into the ground insulated container 3, and the liquid in the ground insulated container 3 enters the ground surface through the underground earth conductor 2 and permeates into the soil environment around the underground earth conductor 2 through a large number of permeation holes 5 distributed in the underground earth conductor 2. The soil resistivity of the whole grounding device is improved through the soil conductivity permeation by utilizing the grounding device permeation network, a soil structure body with good conductivity in a large-range area is formed, short-circuit current can be rapidly and smoothly discharged into the ground through the conductive liquid permeation area, and even if water in the conductive liquid is lost, the residual soil environment containing salt ions can still achieve rapid and smooth discharge of the short-circuit current into the ground.
In order to ensure the grounding effect of the device and the lightning protection capability of the power equipment, in one embodiment, the underground grounding conductor 2 extends into the underground to a depth of not less than 0.8 m.
The invention has the beneficial effects that: the penetration type grounding device changes the traditional galvanized steel flat iron grounding device into a hollow stainless steel grounding tube grounding device with penetration holes, improves the soil conductivity of the soil resistivity of the whole grounding device by using a penetration network of the grounding device through external conductive liquid, quickly and smoothly discharges short-circuit current into the ground through a conductive liquid penetration area, and can still realize the quick and smooth discharge of the short-circuit current into the ground in the remaining saline ion-containing soil environment even if the moisture in the conductive liquid is lost. The device greatly improves the soil characteristics of areas with high soil resistivity, and has obvious effect of improving the grounding performance of the grounding device.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a permeation formula earthing device, its characterized in that, includes ground connection downlead, ground conductor in the ground and the ground insulation container who is equipped with conducting solution, power equipment is connected to ground connection downlead one end, the other end extends into underground, ground conductor is the cavity pipe fitting that the part extends into underground in the ground, ground conductor portion in the ground with ground insulation container intercommunication, underground with ground connection downlead is connected, a plurality of infiltration holes have been seted up to ground conductor's underground portion in the ground, conducting solution warp in the ground insulation container ground conductor flows into underground in the ground.
2. The osmotic grounding device of claim 1, wherein the down conductor is a galvanized steel flat iron with a cross-sectional area not less than 6 square centimeters, and the underground grounding conductor is a stainless steel hollow tube.
3. The permeable grounding device of claim 1, wherein the underground grounding conductor comprises a plurality of horizontal hollow tubes and vertical hollow tubes, the horizontal hollow tubes are buried in the ground in a staggered manner in a # -shape, the vertical hollow tubes vertically extend from the ground into the ground, the top of each vertical hollow tube is communicated with the ground insulating container, and the bottom of each vertical hollow tube is communicated with the corresponding horizontal hollow tube.
4. The osmotic grounding device of claim 1, wherein the diameter of the permeation pores is 0.3-0.6 cm, and the adjacent permeation pores are spaced 8-12 cm apart.
5. The osmotic grounding device of claim 1, further comprising a plurality of metal hoops with flat tops, wherein the metal hoops tightly hold and fix the underground part of the hollow pipe, and the tops of the metal hoops are welded and fixed to the underground end of the grounding down conductor.
6. The osmotic grounding device of claim 5, wherein the underground portion of the hollow pipe is shaped like an inverted T, and the metal hoops are spaced apart from each other on the horizontally disposed pipe body of the hollow pipe.
7. The osmotic grounding device of claim 1, wherein the above-ground portion of the underground grounding conductor is wrapped with an insulating sheath, and the ground insulating container is made of an insulating material.
8. The osmotic grounding device of claim 1, wherein the conductive solution is a sodium chloride solution.
9. The osmotic grounding device of claim 1, wherein the above-ground insulating container is provided with a solution injection port.
10. The osmotic grounding device of claim 1, wherein the underground grounding conductor extends into the ground to a depth of not less than 0.8 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911262903.6A CN111082234A (en) | 2019-12-11 | 2019-12-11 | Permeation type grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911262903.6A CN111082234A (en) | 2019-12-11 | 2019-12-11 | Permeation type grounding device |
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| Publication Number | Publication Date |
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| CN111082234A true CN111082234A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911262903.6A Pending CN111082234A (en) | 2019-12-11 | 2019-12-11 | Permeation type grounding device |
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| CN (1) | CN111082234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437542A (en) * | 2021-06-25 | 2021-09-24 | 河南四达电力设备股份有限公司 | Modular excavation-free grounding device of stainless steel package steel |
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| CN101728661A (en) * | 2008-10-21 | 2010-06-09 | 吕良 | Monitoring low-resistance module grounding device |
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| CN113437542A (en) * | 2021-06-25 | 2021-09-24 | 河南四达电力设备股份有限公司 | Modular excavation-free grounding device of stainless steel package steel |
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Effective date of registration: 20210825 Address after: No.85, Songshan South Road, Erqi District, Zhengzhou City, Henan Province Applicant after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Applicant after: SINOPEC Research Institute OF SAFETY ENGINEERING Applicant after: STATE GRID CORPORATION OF CHINA Address before: No.85, Songshan South Road, Erqi District, Zhengzhou City, Henan Province Applicant before: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Applicant before: STATE GRID CORPORATION OF CHINA |
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Application publication date: 20200428 |