CN209805418U - Power supply lightning protection device capable of improving follow current interruption capacity - Google Patents
Power supply lightning protection device capable of improving follow current interruption capacity Download PDFInfo
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- CN209805418U CN209805418U CN201822033801.4U CN201822033801U CN209805418U CN 209805418 U CN209805418 U CN 209805418U CN 201822033801 U CN201822033801 U CN 201822033801U CN 209805418 U CN209805418 U CN 209805418U
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Abstract
A lightning protection device for a power supply that improves follow current interruption capability, comprising: an inner gas discharge tube, an outer gas discharge tube, and a self-return fuse; the inner gas discharge tube is nested in the outer gas discharge tube to form two independent cavities; and the self-recovery fuse is welded with the middle electrode and the side electrode. The utility model discloses a lightning protection device is when experiencing thunderbolt or overvoltage, and gaseous switching on can release thunderbolt electric current or overvoltage, protection back polar line way or equipment.
Description
Technical Field
The utility model belongs to power lightning protection field, concretely relates to power lightning protection device of improvement afterflow interruption ability of compriseing nested gas discharge tube and recoverable fuse.
Background
The gas discharge tube and the restorable fuse are used as overvoltage and overcurrent protection devices, are widely applied to equipment such as a traffic signal system, a computer data system, a router, a household television set top box and the like, and ensure the safe operation of electronic instruments so as to prevent the equipment from generating faults when the equipment is subjected to overvoltage and overcurrent impact in a line.
currently, gas discharge tubes are used; one or more tube bodies are connected in series, two or more electrodes are hermetically sealed with the ceramic, inert gas is filled in the tube bodies, when the voltage applied to two ends of the gas discharge tube reaches breakdown voltage, the inner gas starts to discharge, the discharge tube rapidly changes from a right high-resistance state to a low-resistance state, and the gas discharge tube is conducted, so that equipment connected with two ends of the gas discharge tube in parallel is protected; however, the distance between the electrodes is not changed due to the current flowing, and it is difficult to realize the method by using the conventional design in order to improve the capability of other parameters and simultaneously improve the follow current capability.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can excessive pressure effective protection circuit to the problem of gas discharge tube afterflow ability, can improve the protection device of afterflow ability again.
The technical scheme of the utility model is that:
The utility model provides an improve power lightning protection device of afterflow interdiction ability, it includes: the ceramic tube type self-recovery fuse comprises a first side electrode, an inner ceramic tube, an outer ceramic tube, a circular ring electrode, a center electrode and a self-recovery fuse which are sequentially arranged;
the middle parts of the central electrode, the inner ceramic tube and the first side electrode are sequentially connected in a surrounding manner to form a first cavity positioned in the middle part, so that an inner gas discharge tube is formed;
The peripheries of the circular ring electrode, the inner ceramic tube, the outer ceramic tube and the first edge electrode are sequentially encircled to form a second cavity positioned at the periphery so as to form an outer gas discharge tube;
The self-recovery fuse is attached to the upper surfaces of the inner gas discharge tube and the outer gas discharge tube, the middle part of the self-recovery fuse is connected with the central electrode, and the periphery of the self-recovery fuse is connected with the ring electrode.
further, a first inner high-temperature solder layer is arranged between the middle part of the first side electrode and the inner ceramic tube; a first outer high-temperature solder layer is arranged between the periphery of the first side electrode and the outer ceramic tube; a second outer high-temperature solder layer is arranged between the outer ceramic tube and the outer ring of the ring electrode; and a second inner high-temperature solder layer is arranged between the inner ceramic tube and the inner ring of the circular ring electrode.
Further, the first cavity and the second cavity are isolated from each other.
Furthermore, a central welding flux layer is arranged between the middle part of the self-recovery fuse and the central electrode, and an edge welding flux layer is arranged between the periphery of the self-recovery fuse and the annular electrode.
Further, the center solder layer and the edge solder layer are disposed on the upper surface of the gas discharge tube in the direction of the discrete electrodes of the discharge tube.
Furthermore, the first edge electrode and the circular ring electrode are respectively provided with a bulge extending into the first cavity; the first edge electrode and the center electrode each have a protrusion extending into the second cavity.
Further, a discharge gap between the upper protrusion and the lower protrusion in the second cavity is larger than a discharge gap between the upper protrusion and the lower protrusion in the first cavity; the height ratio of the discharge gap between the upper and lower protrusions in the first and second cavities is 1/4-1/2, preferably 1/3.
Further, the overall diameter of the power lightning protection device is 24mm, and the height of the power lightning protection device is 10 mm.
Furthermore, the height of the convex part of the middle electrode is 0.5mm-0.8mm, the height of the convex part of the circular ring electrode is 0.1mm-0.3mm, the height of the convex part of the middle part of the first side electrode is 0.5mm-0.8mm, and the height of the convex part of the edge of the first side electrode is 0.1mm-0.3 mm.
Furthermore, the first side electrode, the ring electrode and the center electrode are oxygen-free copper electrodes.
The utility model has the advantages that:
When the lightning protection device of the utility model is subjected to lightning stroke or overvoltage, the gas conduction can release lightning stroke current or overvoltage to protect rear polar lines or equipment; firstly, the inner discharge tube is broken down and conducted, current flows through the inner discharge tube and the self-recovery fuse, the tube body rapidly heats and the temperature rises, the self-recovery fuse becomes a high-resistance state, voltage continues to rise, the outer discharge tube is broken down and conducted, and energy of overvoltage or overcurrent is discharged through the outer discharge tube; after that, the temperature of the tube body is reduced, and the self-recovery fuse is changed into a low-resistance state. The electrode spacing of the outer discharge tube is larger than that of the inner discharge tube, so that the integral follow current capability is improved.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 is an axial sectional view of the lightning protection device of the present invention.
Fig. 2 is an exploded view of the device of the present invention.
In the figure: 1. a first side electrode; 2. a first inner high temperature solder layer; 3. an inner ceramic tube; 4. a first outer high temperature solder layer; 5. an outer ceramic tube; 6. a second outer high temperature solder layer; 7. a ring electrode; 8. a second inner high temperature solder layer; 9. a center electrode; 10. a central solder layer; 11. an edge solder layer; 12. a self-healing fuse; 13. a first cavity; 14. a second cavity.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
a gas discharge tube with a shut-off function, comprising: an inner discharge tube, an outer discharge tube, and a self-healing fuse; the novel lightning protection device comprises a first side electrode 1, a first inner high-temperature solder layer 2, an inner ceramic tube 3, a first outer high-temperature solder layer 4, an outer ceramic tube 5, a second outer high-temperature solder layer 6, a ring electrode 7, a second inner high-temperature solder layer 8 and a central electrode 9 which are sequentially arranged, and two isolated first cavities 13 and second cavities 14 are formed in the device; the self-recovery fuse 12 is welded with the center electrode 9 concentrically by the center solder 10 at the middle part and with the ring electrode 7 by the edge solder 11 at the edge.
Furthermore, the discharge gap between the upper and lower protrusions in the second cavity 14 is larger than the discharge gap between the upper and lower protrusions in the first cavity 13, so that the follow current capability of the discharge tube can be effectively improved; the height ratio of the discharge gap between the upper and lower protrusions in the first and second cavities 13 and 14 is 1/4-1/2, preferably 1/3.
For example: the overall diameter of the power supply lightning protection device is 24mm, and the height of the power supply lightning protection device is 10 mm. The height of the convex part of the middle electrode is 0.5mm-0.8mm, the height of the convex part of the circular ring electrode is 0.1mm-0.3mm, the height of the convex part of the middle part of the first side electrode is 0.5mm-0.8mm, and the height of the convex part of the edge of the first side electrode is 0.1mm-0.3 mm.
In the specific implementation:
As shown in fig. 2, the utility model discloses an explosion diagram of power lightning protection device, in the utility model, the high temperature solder used means that the melting point is greater than 799 ℃, the device is formed with two isolated first cavities and second cavities by first side electrode, first inner high temperature solder layer, first outer high temperature solder layer, inner ceramic tube, outer ceramic tube, second inner high temperature solder layer, second outer high temperature solder layer, center electrode, ring electrode in the aforesaid device; and the middle part of the self-recovery fuse is concentrically welded with the central electrode through central welding flux, and the edge of the self-recovery fuse is welded with the annular electrode through edge welding flux. When the voltage is over, the enclosed inert gas in the first cavity 13 is broken down and then discharged, the current flows through the resettable fuse from the first cavity 13, the instantaneous large current enables the self-resettable fuse to be heated up rapidly, the self-resettable fuse is changed into a high-resistance state from conduction, the first cavity 13 is disconnected from the electrode for arc quenching, and at the moment, the enclosed inert gas in the second cavity 14 is broken down and then discharged; the current flows out of the second cavity 14 and is discharged, and the free-wheeling capability of the discharge tube can be effectively improved because the discharge gap of the second cavity 14 is larger than that of the first cavity 13.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (11)
1. A power supply lightning protection device for improving follow current interruption capability is characterized by comprising: the ceramic tube comprises a first side electrode (1), an inner ceramic tube (3), an outer ceramic tube (5), a circular ring electrode (7), a central electrode (9) and a self-recovery fuse (12) which are sequentially arranged;
The middle parts of the central electrode (9), the inner ceramic tube (3) and the first side electrode (1) are sequentially encircled to form a first cavity (13) positioned in the middle part, so that an inner gas discharge tube is formed;
The peripheries of the circular ring electrode (7), the inner ceramic tube (3), the outer ceramic tube (5) and the first side electrode (1) are sequentially encircled to form a second cavity (14) positioned on the periphery, so that an outer gas discharge tube is formed;
the self-recovery fuse (12) is attached to the upper surfaces of the inner gas discharge tube and the outer gas discharge tube, the middle part of the self-recovery fuse is connected with the central electrode (9), and the periphery of the self-recovery fuse is connected with the annular electrode (7).
2. A lightning protection device for a power supply with increased follow current interruption capability according to claim 1, wherein: a first inner high-temperature solder layer (2) is arranged between the middle part of the first side electrode (1) and the inner ceramic tube (3); a first outer high-temperature solder layer (4) is arranged between the periphery of the first side electrode (1) and the outer ceramic tube (5); a second outer high-temperature solder layer (6) is arranged between the outer ceramic tube (5) and the outer ring of the circular ring electrode (7); a second inner high-temperature solder layer (8) is arranged between the inner ceramic tube (3) and the inner ring of the circular ring electrode (7).
3. a lightning protection device for a power supply with increased follow current interruption capability according to claim 1, wherein: the first cavity (13) and the second cavity (14) are isolated from each other.
4. A lightning protection device for a power supply with increased follow current interruption capability according to claim 1, wherein: a central solder layer (10) is arranged between the middle part of the self-recovery fuse (12) and the central electrode (9), and an edge solder layer (11) is arranged between the periphery of the self-recovery fuse (12) and the annular electrode (7).
5. A lightning protection device for a power supply with increased follow current interruption capability according to claim 4, wherein: the center solder layer (10) and the edge solder layer (11) are arranged on the upper surface of the gas discharge vessel in the direction of the separate electrodes of the discharge vessel.
6. A lightning protection device for a power supply with increased follow current interruption capability according to claim 1, wherein: the first side electrode (1) and the circular ring electrode (7) are respectively provided with a bulge extending into the first cavity (13); the first side electrode (1) and the central electrode (9) are provided with bulges extending into the second cavity (14).
7. a lightning protection device for a power supply with increased follow current interruption capability according to claim 6, wherein: the discharge gap between the upper and lower bulges in the second cavity (14) is larger than the discharge gap between the upper and lower bulges in the first cavity (13); the height ratio of the discharge gap between the upper and lower protrusions in the first cavity (13) and the second cavity (14) is 1/4-1/2.
8. A lightning protection device for a power supply with increased follow current interruption capability according to claim 7, wherein: the height ratio of the discharge gap between the upper and lower protrusions in the first cavity (13) and the second cavity (14) is 1/3.
9. A lightning protection device for a power supply with increased follow current interruption capability according to claim 7, wherein: the overall diameter of the power supply lightning protection device is 24mm, and the height of the power supply lightning protection device is 10 mm.
10. a lightning protection device for a power supply with increased follow current interruption capability according to claim 7, wherein: the height of the convex part of the middle electrode is 0.5mm-0.8mm, the height of the convex part of the circular ring electrode is 0.1mm-0.3mm, the height of the convex part of the middle part of the first side electrode is 0.5mm-0.8mm, and the height of the convex part of the edge of the first side electrode is 0.1mm-0.3 mm.
11. A lightning protection device for a power supply with increased follow current interruption capability according to claim 1, wherein: the first side electrode (1), the ring electrode (7) and the center electrode (9) are oxygen-free copper electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822033801.4U CN209805418U (en) | 2018-12-05 | 2018-12-05 | Power supply lightning protection device capable of improving follow current interruption capacity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822033801.4U CN209805418U (en) | 2018-12-05 | 2018-12-05 | Power supply lightning protection device capable of improving follow current interruption capacity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510186A (en) * | 2018-12-05 | 2019-03-22 | 江苏东光电子有限公司 | A kind of lightning protection device for electric power improving follow current interrupt ability |
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- 2018-12-05 CN CN201822033801.4U patent/CN209805418U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510186A (en) * | 2018-12-05 | 2019-03-22 | 江苏东光电子有限公司 | A kind of lightning protection device for electric power improving follow current interrupt ability |
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