CN218216104U

CN218216104U - Multi-gap lightning protection device with pilot trigger electrode

Info

Publication number: CN218216104U
Application number: CN202221721442.1U
Authority: CN
Inventors: 赵军; 刘细华; 游连桥; 曹安平; 李希
Original assignee: Xiamen Set Electronics Co Ltd
Current assignee: Xiamen Set Electronics Co Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2023-01-03
Anticipated expiration: 2032-07-06

Abstract

The utility model provides a many clearances lightning protection device with guide's trigger electrode, including insulating and the range upon range of N +1 plate electrode that sets up, N +1 plate electrode forms a N discharge gap, an electrode face or two electrode faces of plate electrode are provided with the arch, guide's trigger electrode promptly, the discharge gap is formed by the electrode face that has guide's trigger electrode of a plate electrode and the plane electrode face of another piece of plate electrode or the electrode face combination that has guide's trigger electrode of another piece. The utility model discloses a many clearances lightning protection device can solve triggering of present air gap lightning protection device and ignite inhomogeneous, the current capacity restricted and the follow current when great the problem that the shielding capacity is than poor.

Description

Multi-gap lightning protection device with pilot trigger electrode

Technical Field

The utility model relates to a many clearances lightning protection device field especially relates to a many clearances lightning protection device with guide's trigger electrode.

Background

At present, a multi-gap lightning protection device (except for a multi-gap discharge tube) used in the lightning protection market adopts a plate-shaped electrode discharge mode, and in the use process, due to the characteristics of a manufacturing process and plate discharge, the phenomena of uneven discharge, high arc voltage drop, poor follow current blocking capacity and the like can occur, so that the product protection effect is not ideal, and the service life is short.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the present invention provides a multi-gap lightning protection device with a pilot trigger electrode to solve the problems of uneven trigger ignition, limited current capacity and poor follow current interruption capacity when the current air gap lightning protection device is triggered and ignited.

In order to achieve the above object, the utility model provides a many clearances lightning protection device with guide's trigger electrode, including insulating and the range upon range of N +1 plate electrode that sets up, N +1 plate electrode forms a N discharge gap, one electrode face or two electrode faces of plate electrode are provided with the arch, guide's trigger electrode promptly, the discharge gap is formed by the electrode face that has guide's trigger electrode of a plate electrode and the plane electrode face of another plate electrode or the electrode face combination that has guide's trigger electrode.

Furthermore, the multi-gap lightning arrester also comprises a first pin electrode, a second pin electrode, N connecting electrodes, N insulating sheets and a support frame, wherein the plate electrodes, the connecting electrodes and the insulating sheets are sequentially stacked;

the connecting electrode is used for connecting the plate-shaped electrode and an absorption circuit of the multi-gap lightning arrester of the bypass;

the support frame is provided with a positioning groove, and the plate electrode, the connecting electrode and the insulating sheet are stacked through the support frame to form a discharge gap;

the first pin electrode and the second pin electrode are respectively abutted against the plate-shaped electrodes at two ends to form conductive connection.

Furthermore, the first pin electrode and the second pin electrode are side plates of the multi-gap lightning arrester, the support frame comprises a pair of plastic parts, and the first pin electrode and the second pin electrode are fixedly connected with the pair of plastic parts of the support frame from two sides of the support frame.

Furthermore, the connecting electrode is of a frame structure, and the frame of the connecting electrode is abutted against four sides of the plate-shaped electrode.

Furthermore, the insulating sheet is of a frame structure, one surface of the insulating sheet is abutted against the plate-shaped electrode, and the other surface of the insulating sheet is abutted against the connecting electrode; the central through hole of the insulation sheet forms a discharge gap.

Furthermore, the middle part of the electrode surface of the plate electrode with the pilot trigger electrode is provided with one or more pilot trigger electrodes distributed in an array.

Furthermore, the height of the pilot trigger electrode is 0.05-2.0 mm.

Further, the plate electrode is made of graphite.

Further, the plate-shaped electrode is made of copper alloy.

Further, the plate-shaped electrode and the connecting electrode are integrated electrodes.

Drawings

FIG. 1 is an expanded view of an embodiment of the multi-gap lightning protection device of the present invention;

FIG. 2 is a cross-sectional view and a partial enlarged view of an embodiment of the multi-gap lightning protection device with a single-sided pilot trigger electrode according to the present invention;

FIG. 3 is a cross-sectional view and a partial enlarged view of an embodiment of the multi-gap lightning protection device with a double-sided pilot trigger electrode according to the present invention;

FIG. 4 is a schematic structural diagram of a plate electrode with a single-sided single pilot trigger electrode according to the present invention;

fig. 5 is a schematic structural diagram of a plate electrode with a plurality of single-sided pilot trigger electrodes according to the present invention;

FIG. 6 is a schematic structural diagram of a plate electrode with a double-sided single pilot trigger electrode according to the present invention;

fig. 7 is a schematic structural view of a plate electrode with a plurality of double-sided pilot trigger electrodes according to the present invention.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Example 1

As shown in fig. 1-2, the present embodiment provides a multi-gap lightning protection device with a single-sided pilot trigger electrode, which is composed of a pin electrode 1, a pin electrode 5, a plate electrode 3, a connection electrode 4, an insulation sheet 2, a support frame 6, a support frame 7, and a screw 8.

Between the lead electrode 1 and the lead electrode 5, a plate electrode 3, an insulating sheet 2, a connection electrode 4, the plate electrode 3, an insulating sheet 2, the connection electrode 4, and the plate electrode 3 are sequentially stacked in this order to form a plurality of discharge gaps.

In embodiment 1, one electrode surface of the plate electrode 3 is a planar electrode surface, and the other electrode surface is provided with one or more protrusions (or protrusions) which are defined as the leading trigger electrode 31. When high overvoltage occurs on a protected circuit, high voltage difference is generated in multiple gaps of the lightning protector, at the moment, because local electric field intensity exceeds ionization field intensity of gas, the gas is ionized and excited, corona discharge occurs, the pulse frequency and amplitude of corona current are increased along with the continuous rise of the overvoltage of the circuit, a pilot arc is generated between the pilot trigger electrode 31 in a discharge gap and another plate electrode 3, the whole gap is punctured, then the pilot arc is guided to the whole gap to be ignited and conducted, and the action of the multi-gap lightning protector protects a power supply system. Because one or N pilot trigger electrodes are arranged in the gap, when one or N pilot trigger electrodes are ignited at the same time, a uniform discharge field can be generated in the gap, so that the pulse current can be fully discharged on the effective area in the gap, and a good protection effect is achieved.

In embodiment 1, the connection electrode 4 is a frame structure, and abuts against four sides of the plate electrode 3, so as to limit and fix the plate electrode 3, and at the same time, form a conductive connection, and connect the plate electrode 3 to an absorption circuit (such as an RC absorption circuit) of a multi-gap lightning arrester of a bypass.

In example 1, the insulating sheet has a frame structure, one surface of which is abutted against the plate-like electrode 3 and the other surface of which is abutted against the connection electrode 4, and a discharge gap is formed between the two plate-like electrodes 3.

Example 2

As shown in fig. 3, the present embodiment provides a multi-gap lightning protection device with a double-sided pilot trigger electrode. In contrast to example 1: the plate-like electrode 3 in this embodiment has

pilot electrodes

31 and 32 on both electrode surfaces. When high overvoltage occurs on the protected line, high voltage difference is generated in the multi-gap of the lightning protector, and then the pilot trigger electrode 31 in the discharge gap and the pilot trigger electrode 32 of the other plate-shaped electrode 3 generate pilot arc.

Example 3

As shown in fig. 4, this embodiment provides a schematic structural diagram of a plate electrode with a single-sided single pilot trigger electrode, where (a) is a front view and (b) is a side view. A single pilot trigger electrode 31 is provided in the center of one electrode surface of the plate electrode 3.

Example 4

As shown in fig. 5, this embodiment provides a schematic structural diagram of a plate electrode with a plurality of leading trigger electrodes on one side, where (a) is a front view, and (b) is a side view. The middle part of one electrode surface of the plate electrode 3 is provided with a plurality of pilot trigger electrodes 31 distributed in an array, and the other electrode surface is a plane electrode surface.

Example 5

As shown in fig. 6, this embodiment provides a schematic structural diagram of a plate electrode with a double-sided single pilot trigger electrode, where (a) is a front view and (b) is a side view. One

pilot trigger electrode

31, 32 is provided on each of the two electrode surfaces of the plate electrode 3.

Example 6

As shown in fig. 7, this embodiment provides a schematic structural diagram of a plate electrode with a double-sided single pilot trigger electrode, where (a) is a front view and (b) is a side view. A plurality of

pilot trigger electrodes

31 and 32 are arranged in an array at the middle of the two electrode surfaces of the plate-shaped electrode 3.

In

embodiments

1 and 2, the lead electrode 1 and the lead electrode 5 may be electrodes with the same structure, or electrodes with different structures, so as to meet the requirements of different product structure shapes.

In

embodiments

1 and 2, the

support frames

6 and 7 are both plastic members, and the support frame 6 and the support frame 7 may be of the same structure or different structures. One side of

support frame

6, 7 sets up the constant head tank, and when the equipment,

support frame

6, 7 set up relatively, install the location to insulating piece 2, plate electrode 3 and connecting electrode 4.

In

embodiments

1 and 2, the pin electrode 1 and the pin electrode 5 simultaneously serve as two side plates of the multi-gap lightning arrester, and during assembly, the pin electrode 1 and the pin electrode 5 are fixedly connected with the

support frames

6 and 7 through the screw 8 to form a multi-gap lightning arrester assembly.

Preferably, the height of the leading

ignition electrodes

31, 32 ranges from 0.05 mm to 2.0 mm.

Preferably, the material of the plate-like electrode 3 may be graphite or a copper alloy.

In other embodiments, when the plate-shaped electrode 3 is a copper alloy electrode, the plate-shaped electrode 3 and the connection electrode 4 may be integrated electrodes.

The multi-gap lightning protection device adopting the mode has the following advantages:

1. reduce the residual voltage of lightning protection device: due to the adoption of the pilot triggering technology, the effective area in the gap can be fully utilized, and after the ignition area is increased, the corresponding arc impedance is reduced, so that the effect of reducing the residual voltage is achieved.

2. The through-current capacity of the lightning protection device is improved: as the ignition area of the air gap is increased, the capability of discharging pulse current is correspondingly enhanced, and the current capacity of the air gap is improved by 30-50% compared with that of the air gap with only a point breakdown or a small part of breakdown surface.

3. Increase of follow current interruption capability: after the ignition area of the lightning protection gap is increased, when breakdown generates follow current, the energy required by the conventional multi-gap lightning protection device for generating follow current is much larger, that is, the maintaining time of the follow current generated by the lightning protection gap with the pilot trigger electrode with the same energy is greatly shortened.

4. The application range of the lightning protection device is expanded: due to the improvement of the performances of the two aspects of 1 and 2, the multi-gap lightning protector adopting the technology can be expanded to a plurality of application fields.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A multi-gap lightning protection device with a pilot trigger electrode comprises N +1 plate-shaped electrodes which are insulated and stacked, wherein N discharge gaps are formed by the N +1 plate-shaped electrodes, and the multi-gap lightning protection device is characterized in that one electrode surface or two electrode surfaces of the plate-shaped electrodes are provided with bulges, namely the pilot trigger electrode, and the discharge gaps are formed by combining the electrode surface with the pilot trigger electrode of one plate-shaped electrode and the plane electrode surface or the electrode surface with the pilot trigger electrode of the other plate-shaped electrode.

2. The multi-gap lightning protection device with a pilot trigger electrode according to claim 1, further comprising a first pin electrode, a second pin electrode, N connection electrodes, N insulation sheets and a support frame, wherein the plate electrodes, the connection electrodes and the insulation sheets are sequentially stacked;

the support frame is provided with a positioning groove, and the plate-shaped electrode, the connecting electrode and the insulating sheet are stacked through the support frame to form a discharge gap;

3. The lightning protection device of claim 2, wherein the first and second lead electrodes are side plates of the lightning protection device, and the support frame comprises a pair of plastic parts, and the first and second lead electrodes are fastened to the pair of plastic parts of the support frame from two sides of the support frame.

4. The lightning protection device with multiple gaps and leading triggering electrode according to claim 2, wherein the connecting electrode is a frame structure, and the frame of the connecting electrode is abutted against four sides of the plate electrode.

5. The lightning protection device with multiple gaps and leading triggering electrodes according to claim 2, wherein the insulation sheet is a frame structure, one surface of the insulation sheet is abutted with the plate-shaped electrode, and the other surface of the insulation sheet is abutted with the connecting electrode; the central through hole of the insulation sheet forms a discharge gap.

6. The lightning protection device with multiple gaps and leading electrodes according to claim 1, wherein the middle of the electrode surface of the plate electrode with the leading electrodes is provided with one or more leading electrodes distributed in an array.

7. The lightning protection device with multiple gaps provided with a leading ignition electrode according to claim 1, wherein the height of the leading ignition electrode is 0.05 mm to 2.0 mm.

8. The lightning protection device with multiple gaps with a leading strike electrode of claim 1, wherein the material of said sheet electrode is graphite.

9. The lightning protection device with multiple gaps with a leading strike electrode of claim 1, wherein the material of the plate electrode is a copper alloy.

10. The lightning protection device with multiple gaps with a leading strike electrode according to claim 2, wherein said plate electrode and said connecting electrode are integral electrodes.