CN209963751U

CN209963751U - Variable-energy ground potential counterattack isolator

Info

Publication number: CN209963751U
Application number: CN201920260305.4U
Authority: CN
Inventors: 蔡仁峰; 蔡仁进
Original assignee: Yangzhou Huafeng Lightning Protection New Technology Co Ltd
Current assignee: Yangzhou Huafeng Lightning Protection New Technology Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-01-17
Anticipated expiration: 2029-02-28

Abstract

The utility model provides a become ability earth potential counterattack isolator, including aluminium matter shell, be provided with binding post and ground terminal in the aluminium matter shell, the parallel connection has a plurality of lightning protection variable energy components between binding post and the ground terminal, the lightning protection variable energy component includes shell and inner core, shell and inner core between be provided with the cavity, the cavity intussuseption be filled with the electrolyte. The utility model provides an adopt the equipotential protector among the prior art, because the discharge gap of equipotential protector can not in time start to switch on and release unnecessary electric current to and whole earth mat leads to the electric potential lifting to cause the counterattack because of induced-current, arouses the technical problem of the damage of equipment, and then has realized playing the technological effect of more effectual protection.

Description

Variable-energy ground potential counterattack isolator

Technical Field

The utility model relates to an electrical protection isolating device field especially relates to an earth potential counterattack isolator.

Background

The ground potential counterattack phenomenon generally refers to: when an external lightning protection system (such as a lightning rod, a lightning protection net, etc.) of a building is directly struck by lightning, overvoltage harmful to two ends of a ground resistor is generated, and the overvoltage is introduced into the equipment through a ground wire of the equipment, the external lightning protection system of other buildings near the building or other natural lightning receptors (various pipelines, cable shielding pipes, etc.), so that the damage of the equipment is caused.

Earth potential counterattack: when the lightning current flows through the grounding bodies, the lightning current flows back to the equipment from other grounding bodies, so that the equipment is damaged.

According to the lightning protection specification, the equipment grounding system and the lightning protection grounding system are connected to a common ground network so as to reduce or eliminate the potential difference between each other. To eliminate the counterattack phenomenon, two measures are generally taken: firstly, equipotential connection is carried out, and two metal conductors are connected by using the metal conductors, so that the potentials are equal when the two metal conductors are connected; secondly, a safety distance of 20 meters is kept between the two.

First, the current equipotential protector that adopts, the inside insulating chamber of forming by a determining deviation of two electrodes of equipotential protector, if the thunderbolt phenomenon has taken place, because the effect of excessive pressure, can take place gas discharge in the insulating chamber, will change into interim electrical connection state by original isolated state between two electrodes like this to eliminate the potential difference.

However, in the prior art, because the equipotential protector utilizes when the high voltage appears, make the equipotential protector switch on in the twinkling of an eye, in order to reach the purpose of the intercommunication earial drainage between the earth mat or between equipment and the equalizer ring, according to this principle, at equipotential protector both ends resistance value difference, in-service use in-process, inconsistent circumstances can appear in the resistance value at equipotential protector both ends, the resistance that is close to the equalizer ring end is the qualification value, and the resistance value that is close to the equipment end is the nonconforming value, or the electric current residual voltage does not reach the minimum that the equipotential protector started, cause the discharge gap of equipotential protector can not in time start to switch on and release unnecessary electric current, still can cause the damage of equipment. Therefore, the equipotential protectors do not fully protect.

Moreover, the process of installing the equipotential protector is very troublesome, and a large amount of ground needs to be excavated, so that the construction difficulty is increased. In the prior art, even if the first two measures can be implemented effectively, the voltage difference between the ground grid and the equipment cannot be reduced, and ground potential counterattack can be caused. The counterattack of the ground potential can be effectively prevented only by effectively reducing the voltage difference between the ground network and the equipment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a become ability earth potential counterattack isolator has solved among the prior art and has adopted the equipotential protector, because the discharge gap of equipotential protector can not in time start to switch on and release unnecessary electric current to and whole earth mat leads to the electric potential lifting to cause the counterattack because of induced-current, arouses the technical problem of the damage of equipment, and then has realized the technological effect that can play more effective protection.

The utility model provides a become ability earth potential counterattack isolator, includes aluminium matter shell, is provided with binding post and ground terminal in the aluminium matter shell, and it has a plurality of lightning protection variable energy elements to connect in parallel between binding post and the ground terminal, the lightning protection variable energy element includes shell and inner core, shell and inner core between be provided with the cavity, the cavity intussuseption be filled with the electrolyte.

In addition, the preferable structure is that the connecting terminal, the grounding terminal and the plurality of lightning protection energy conversion elements are encapsulated in the aluminum shell by adopting an insulating plate.

In addition, the shell of the lightning protection energy conversion element is preferably a metal shell.

Preferably, the lightning protection energy conversion element is engaged with the insulating plate sealed by a metal fixing clip.

Further, it is preferable that the ground terminal includes a working ground terminal, an antistatic ground terminal, a protection ground terminal, and other ground terminals.

In addition, the preferable structure is that the internal resistance of the electrolyte is less than 0.6 ohm in a low-voltage test, and less than 0.06 ohm in a high-voltage test.

In addition, the number of the lightning protection energy conversion elements is preferably 2 to 5.

In addition, the number of the lightning protection energy conversion elements is preferably 2.

In addition, it is preferable that a waterproof rubber strip is filled between the metal casing and the insulating plate.

In addition, the preferable structure is that the variable-energy ground potential counterattack isolator is arranged among the lightning protection grounding wire busbar, the equalizing ring and the grounding grid through wires; or between the grounding busbar and the ground screen.

The utility model discloses at least, following technological effect or advantage have:

1. the technical problem of when adopting the equipotential protector among the prior art, cause the discharge gap of equipotential protector can not in time start to switch on and release unnecessary electric current, cause the earth potential abrupt lifting to arouse the damage of equipment is solved, and then the technical effect of effectively protecting equipment can be carried out.

2. Because this earth potential counterattack isolator sets up between ground connection generating line and ground net, solved prior art medium potential protector and set up between ground net or equipment and grading ring, the process of installation equipotential protector is very troublesome, need excavate a large amount of ground, technical problem that construction strength is big, and then has realized simple to operate's technological effect.

Drawings

Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:

fig. 1 is a schematic view of a position where a ground potential counterattack isolator is disposed in an embodiment of the present invention;

figure 2 is a schematic cross-sectional block diagram of a ground potential counterattack isolator in an embodiment of the present invention.

Wherein the reference numerals include: the transformer ground potential back-strike isolator comprises a transformer ground potential back-strike isolator 1, a grounding bus bar 2, a grounding grid 3, a grading ring 4, a lightning protection energy transforming element 12, an aluminum shell 21, an insulating plate 22, a shell 23, an inner core 24, an electrolyte 25, a metal fixing clip 26, a metal wire 27, a grounding terminal 28 and a wiring terminal 29.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

For the purpose of describing the variable-energy ground potential impact isolator according to the embodiment of the present invention in detail, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides an earth potential counterattack isolator 1 sets up between female arranging of lightning protection earth connection, equalizer ring 4 and grounding grid 3 and between female arranging of ground connection and grounding grid 3, connects through ground connection bus 2 between them. The grounding busbar comprises a working grounding, a protection grounding and an anti-static grounding.

As can be seen from fig. 1, the lightning energy is discharged from the lightning grounding busbar or the grading ring 4 to the grounding grid 3, and the lightning protection variable energy element in the variable-energy ground potential counterattack isolator 1 has a nonlinear resistance characteristic, so that the lightning current of 60KA (8/20) or more can be smoothly converted, and the residual voltage can be greatly reduced.

In addition, the grounding grid 3 may generate reverse discharge to the grounding bus bar due to the increase of the induced potential caused by various reasons. The variable-energy ground potential counterattack isolator 1 has small charge conversion, and can reduce the induction charge of the grounding grid 3, so that counterattack on the equalizing ring 4 and the rear equipment of the grounding busbar is avoided, and a protection effect is achieved.

Specifically, referring to fig. 2, the energy-transforming ground-potential impact isolator 1 includes an aluminum housing 21, a connection terminal 29 and a ground terminal 28 are arranged in the

aluminum housing

21, 2 lightning protection energy transforming elements 12 are connected in parallel between the connection terminal 29 and the ground terminal 28, each lightning protection energy transforming element 12 includes a housing 23 and an inner core 24, a cavity is arranged between the housing 23 and the inner core 24, and the cavity is filled with an electrolyte 25. The internal resistance of the electrolyte 25 is less than 0.6 ohm in a low voltage test and less than 0.06 ohm in a high voltage test.

The lightning energy passes through the lightning protection ground wire in the ground wire busbar and then enters the grounding grid after entering the lightning protection energy conversion element 12 through the lead. When flowing through the inner core 24 and the electrolyte 25, an eddy current phenomenon is generated inside the super-power transformer 12, and energy is converted into heat energy, magnetic field energy and the like, so that the capacity and the battery characteristics are provided for absorption and conversion, and the residual voltage is further reduced, thereby protecting the safety of equipment.

In a preferred embodiment, shown in fig. 2, the lightning current passing through the lightning protection energy transforming element 12 generates electromagnetic energy, which is shielded by an aluminum housing 21 to avoid interference with the equipment signals.

In a preferred embodiment, the lightning protection transformer element 12 is snapped into the sealed insulating plate 22 with a metal clip 26 in order to keep the components of the transformer ground potential strike isolator 1 from being shaken or moved freely within the aluminum housing 21. Waterproof adhesive tape is filled between the outer shell 23 and the insulating plate 22, so that the internal elements cannot be affected by damp and the performance is not affected.

As shown in fig. 1, the variable-energy ground potential counterattack isolator 1 is arranged between a grounding busbar or a grading ring 4, a lightning protection grounding bar and a grounding grid 3, and because the grounding busbar, the grading ring 4, the lightning protection grounding bar and the grounding busbar are arranged on the ground, a large amount of ground does not need to be excavated when the variable-energy ground potential counterattack isolator 1 is installed, and the construction is convenient and simple.

Preferred embodiments of the invention, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

Claims

1. The utility model provides a become ability earth potential counterattack isolator, includes aluminium matter shell, its characterized in that, is provided with binding post and ground terminal in the aluminium matter shell, and it has a plurality of lightning protection variable energy components to connect in parallel between binding post and the ground terminal, the lightning protection variable energy component include shell and inner core, shell and inner core between be provided with the cavity, the cavity intussuseption be filled with the electrolyte.

2. A variable energy ground potential counterattack isolator as claimed in claim 1 in which the terminal, ground terminal and plurality of lightning protection variable energy elements are further enclosed within an aluminum housing by insulating panels.

3. A variable energy ground potential counterattack isolator as claimed in claim 1 in which the housing of the lightning protection variable energy element is a metal housing.

4. The variable energy ground potential counterattack isolator of claim 1, wherein the lightning protection variable energy element is snapped into the sealed insulating plate using a metal retainer clip.

5. The variable energy ground potential counterattack isolator of claim 1, wherein the ground terminals include a working ground terminal, an anti-static ground terminal and a protection ground terminal.

6. The variable energy ground potential counterattack isolator of claim 1, wherein the internal resistance of the electrolyte is less than 0.6 ohm on low voltage test and less than 0.06 ohm on high voltage test.

7. A variable energy ground potential counterattack isolator as claimed in claim 1 in which the number of lightning protection variable energy elements is from 2 to 5.

8. A variable energy ground potential counterattack isolator as claimed in claim 7 in which the number of lightning protection variable energy elements is 2.

9. The variable-energy ground-potential impact isolator as claimed in claim 1, wherein a waterproof rubber strip is filled between the metal casing and the insulating plate.

10. The variable-energy ground potential counterattack isolator is characterized in that the variable-energy ground potential counterattack isolator is arranged among a lightning grounding wire busbar, a grading ring and a grounding grid through a lead; or between the grounding busbar and the ground screen.