CN204835524U - Lightning protection for power supply - Google Patents
Lightning protection for power supply Download PDFInfo
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- CN204835524U CN204835524U CN201520539691.2U CN201520539691U CN204835524U CN 204835524 U CN204835524 U CN 204835524U CN 201520539691 U CN201520539691 U CN 201520539691U CN 204835524 U CN204835524 U CN 204835524U
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- lightning protection
- connection piece
- power supply
- arc
- flexible connection
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Abstract
For overcoming among the prior art problem that lightning protection for power supply may generate current draws the arc, the utility model provides a lightning protection for power supply. Include the casing and arrange in lightning protection circuit and tripping device in the casing, it has the instruction window to open on the casing, the lightning protection circuit includes a plurality of piezo -resistor, wherein, tripping device includes elastic connection piece, compression spring and arc -extinguish chamber, the elastic connection piece concatenates in the lightning protection circuit, wherein, the one end of elastic connection piece is held for the soldering, soldering end with piezo -resistor's in the lightning protection circuit electrode slice soldering forms soldering point, the compression spring and the arc extinguishing envelope of hood are in on the elastic connection piece, the utility model discloses a lightning protection for power supply can effectively eliminate elastic connection piece and the electric arc that the piezo -resistor electrode slice probably exists before, realizes the purpose of arc extinguishing.
Description
Technical field
The utility model relates to lightning protection for power supply field.
Background technology
Basis is practical newly relates to lightning protection for power supply, particularly uses the lightning protection device of piezo-resistance (MOV).Be mainly used in the firsts and seconds lightning protection of power-supply system, the power distribution cabinet, communication base station, transformer station etc. of such as various occasion.For lightning current of releasing, be struck by lightning the induction overvoltage, all kinds of temporary overvoltage, switching overvoltage etc. that cause, thus protected power consumption equipment is damaged from thunder and lightning or other overvoltage.
The lightning protection for power supply of current use piezo-resistance (MOV) obtains and uses widely.But lightning protection device is the same with other components and parts, also there is situation that is aging and that damage, the most critical point of lightning protection for power supply self wants safety, can not bring hidden danger, such as self deterioration catches fire, cause fire etc. in utilization.Next is only the effect of protection power consumption equipment.
Because piezo-resistance all exists deterioration, namely with constantly changing service time, the form of expression is that leakage current continues to increase, when piezo-resistance has leakage current to flow through, heat can be produced, the heat produced and the size positive correlation of leakage current, leakage current is larger, and the heat of generation is larger, when the heat produced exceedes its heat distributed is, we are referred to as to lose heat balance, that temperature can constantly rise, if do not have suitable tripping mechanism when losing heat balance, piezo-resistance will burn short circuit, causes grid short circuit.
So be generally all provided with the mechanical tripping mechanism of show state in current existing power supply lightning protection device, general tripping mechanism has included brace and and elastic mechanism, indicating device, this brace is generally connected in series in circuit, one end wherein as soldered end, with certain electrode slice soldered of piezo-resistance; This indicating device is provided with indicator board, this indicator board is marked with two kinds of colors (such as red and green).This brace itself has elasticity, and when piezo-resistance goes wrong adstante febre, will the soldered end of brace is separated with pressure-sensitive resistor electrode plate, indicating device offsets under the effect of elastic mechanism; When lightning protection for power supply is working properly, its housing is seen in display window indicator board shows certain color (such as green), when lightning protection device breaks down, when brace soldered end is separated with pressure-sensitive resistor electrode plate, indicating device drives indicator board to offset by under the effect of elastic mechanism, housing is seen in display window indicator board shows another kind of color (such as red).
Along with the high speed development of commercial power and new forms of energy, utilization voltage is also more and more higher, and rise to 400/690V from original conventional 220/380V, such as solar energy inverter side, the voltages such as wind power grid side are all higher.Voltage is high, can be more effective, saves the energy, also more can drive powerful device.
For finding that lightning protection for power supply but one that brings very large problem are exactly simultaneously, distance after departing between the soldered end of current existing brace and pressure-sensitive resistor electrode plate is not long, if piezo-resistance failed shorted, also electric arc can be produced after low-temperature electrodes and low temperature solder joint depart from, because pilot arc needs voltage, ME for maintenance raises with the increasing of distance, when voltage is low, electric arc is easy to knock out, electrical network there will not be problem, when voltage is high, when electric current is large, and distance in short-term, will the continuous arcing of generation current, in fact be exactly really do not disconnect, thus cause serious accident.
Utility model content
For overcome to depart between the soldered end of brace on lightning protection for power supply tripping mechanism in prior art and pressure-sensitive resistor electrode plate after distance not long, make that voltage is high, electric current is large, and distance in short-term, the problem of the continuous arcing of meeting generation current, the utility model provides a kind of lightning protection for power supply.
The lightning protection for power supply that the utility model provides, comprises housing and the lightning protection circuit be placed in described housing and tripping mechanism;
Described housing has indication window; Described lightning protection circuit comprises some piezo-resistances;
Wherein, described tripping mechanism comprises flexible connection piece, Compress Spring and arc-extinguish chamber;
Described flexible connection piece is serially connected in described lightning protection circuit; Wherein, one end of described flexible connection piece is soldered end; The electrode slice soldered of the piezo-resistance in described soldered end and described lightning protection circuit, forms eutectic welding contact;
Described Compress Spring and arc-extinguish chamber are enclosed within described flexible connection piece; Described arc-extinguish chamber is between described eutectic welding contact and described Compress Spring; When described flexible connection piece is operated in normal condition, this arc-extinguish chamber extrudes described Compress Spring; When eutectic welding contact departs from welding, described Compress Spring restores, and is passed by arc-extinguish chamber, make arc-extinguish chamber between the electrode slice and the soldered end of described flexible connection piece of described piezo-resistance to eutectic welding contact direction;
Described arc-extinguish chamber is provided with an indicating piece, and described indication window shows this indicating piece state.
Preferably, described tripping mechanism also comprises an elastic supporting mechanism; Described elastic supporting mechanism supports described flexible connection piece, applies the elastic force departing from described eutectic welding contact to the soldered end of described flexible connection piece.
Preferably, external terminal is provided with in described housing; Described external terminal comprises L external terminal and N external terminal;
Described lightning protection circuit is arranged between described L external terminal and N external terminal;
Preferably, described lightning protection circuit comprises resistive module, and described resistive module comprises 3 resistance branch be connected in parallel, and resistance branch described in every bar comprises two or more piezo-resistance;
In each described resistance branch, correspondence arranges a tripping mechanism.
Preferably, the resistance branch of described resistive module comprises two piezo-resistances; Flexible connection piece in each tripping mechanism is serially connected between two piezo-resistances;
One alarm circuit plate is installed in the space between former and later two piezo-resistances of resistance branch; On described alarm circuit plate, correspondence is provided with 3 sensitive switches;
The upper end of described elastic supporting mechanism connects with described flexible connection piece, and the lower end of described elastic supporting mechanism connects with described sensitive switch.
Preferably, described lightning protection circuit also comprises an air gap, connects with described resistive module in described air gap.
Preferably, described lightning protection for power supply also comprises warning output interface, and described warning output interface is connected with described alarm circuit plate.
Preferably, the soldered end of described flexible connection piece is provided with link slot; The electrode slice of described piezo-resistance inserts in described link slot, soldered.
Preferably, described arc-extinguish chamber is the sleeve of one square, circular, triangle or random appearance.
Preferably, described arc-extinguish chamber is a square sleeve.
Lightning protection for power supply disclosed in the utility model, due to sheathed on its flexible connection piece in tripping mechanism Compress Spring and arc-extinguish chamber, so, when eutectic welding contact departs from welding, described Compress Spring restores, arc-extinguish chamber is passed to eutectic welding contact direction, be enclosed within the soldered end on flexible connection piece, make arc-extinguish chamber between the electrode slice and the soldered end of described flexible connection piece of described piezo-resistance, add the distance between soldered end to pressure-sensitive resistor electrode plate on this flexible connection piece; The electric arc that may exist before effective elimination flexible connection piece and pressure-sensitive resistor electrode plate, realizes the object of arc extinguishing.Meanwhile, the indicating piece on it plays the effect of indicating status, when deterioration appears in lightning protection for power supply, provides the instruction of having lost efficacy, facilitates technical staff to safeguard replacing.
Accompanying drawing explanation
Fig. 1 is the lightning protection for power supply appearance schematic diagram provided in the utility model embodiment;
Fig. 2 is the internal structure schematic diagram of the lightning protection for power supply tripping mechanism provided in the utility model embodiment when not threading off;
Internal structure schematic diagram when Fig. 3 is the lightning protection for power supply tripping mechanism dropout provided in the utility model embodiment;
Fig. 4 is internal structure schematic diagram when not threading off after the lightning protection for power supply provided in the utility model embodiment conceals shell;
Fig. 5 is internal structure schematic diagram when threading off after the lightning protection for power supply provided in the utility model embodiment conceals shell.
Wherein, 1, housing; 1a, upper cover; 1b, base; 10, plug wire hole; 11, hole is tightened; 12, indication window; 2, external terminal; 3, piezo-resistance; 31, electrode slice; 4, air gap; 5, alarm circuit plate; 51, sensitive switch; 52, warning output interface; 6, elastic supporting mechanism; 7, flexible connection piece; 8, arc-extinguish chamber; 81, indicating piece; 9, Compress Spring.
Embodiment
The technical problem solved to make the utility model, technical scheme and beneficial effect are clearly understood, below in conjunction with drawings and Examples, are further elaborated to the utility model.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment
The lightning protection for power supply that the utility model provides, as shown in figs 2-4, comprises housing 1 and the lightning protection circuit that is placed in described housing 1 and tripping mechanism;
Described housing 1 has indication window 12; Described lightning protection circuit comprises some piezo-resistances 3;
Wherein, described tripping mechanism comprises flexible connection piece 7, Compress Spring 9 and arc-extinguish chamber 8;
Described flexible connection piece 7 is serially connected in described lightning protection circuit; Wherein, one end of described flexible connection piece 7 is soldered end; Electrode slice 31 soldered of the piezo-resistance 3 in described soldered end and described lightning protection circuit, forms eutectic welding contact;
Described Compress Spring 9 and arc-extinguish chamber 8 are enclosed within described flexible connection piece 7; Described arc-extinguish chamber 8 is between described eutectic welding contact and described Compress Spring 9; When described flexible connection piece 7 is operated in normal condition, this arc-extinguish chamber 8 extrudes described Compress Spring 9; When eutectic welding contact departs from welding, described Compress Spring 9 restores, and is passed by arc-extinguish chamber 8, make arc-extinguish chamber 8 between the electrode slice 31 and the soldered end of described flexible connection piece 7 of described piezo-resistance 3 to eutectic welding contact direction;
Described arc-extinguish chamber 8 is provided with an indicating piece 81, and described indication window 12 shows this indicating piece 81 state.
In this example, described lightning protection circuit comprises resistive module, and described resistive module comprises 3 resistance branch be connected in parallel, and resistance branch described in every bar comprises two or more piezo-resistance 3; In this example, the resistance branch of described resistive module comprises two piezo-resistances 3; In each described resistance branch, correspondence arranges a tripping mechanism, and the flexible connection piece 7 in each tripping mechanism is serially connected between two piezo-resistances 3.In this example, described lightning protection circuit also comprises an air gap 4, connects with described resistive module in described air gap 4.
This flexible connection piece 7 possesses elasticity, as shown in Figure 2, Figure 4 shows, when flexible connection piece 7 is operated in normal condition, in this example, this flexible connection piece 7 is converted into the shape of L shape, when eutectic welding contact departs from welding, there is deformation in this flexible connection piece 7, the soldered end of this flexible connection piece 7 pops up, and is separated with the electrode slice 31 in piezo-resistance 3.
Wherein, described arc-extinguish chamber 8 is the sleeve of one square, circular, triangle or random appearance.In this example, described arc-extinguish chamber 8 is a square sleeve.This indicating piece 81 is the laminated structure exported from the opening part bending of this square sleeve.This indicating piece 81 is provided with color, adopts red in such as this example.The material of this arc-extinguish chamber 8 is not particularly limited, as long as it possesses the characteristic of insulation, can completely cut off electric arc.Such as adopt PBT (Chinese full name: polybutylene terephthalate (PBT), English full name: polybutyleneterephthalate), PA66 (the Chinese full name of PA is polyamide, English name: polyamide) or PTFE (Chinese full name; Polytetrafluoroethylene, English full name: Polytetrafluoroethylene) etc.
The concrete connected mode of this eutectic welding contact is described below: the soldered end of described flexible connection piece 7 is provided with link slot; The electrode slice 31 of described piezo-resistance 3 inserts in described link slot, soldered.
Certainly, external terminal 2 is provided with in described housing 1; Described external terminal 2 comprises L external terminal and N external terminal; Described lightning protection circuit is arranged between described L external terminal and N external terminal.As everyone knows, external terminal 2 is used for being electrically connected with external power line, and power line comprises L line and N line, and L line is electrically connected with this L external terminal, and N line is electrically connected with N external terminal.
The concrete method of attachment of external terminal 2 is as follows: on described upper cover 1a, be provided with plug wire hole 10 and tighten hole 11; External L line and N line insert in corresponding plug wire hole 10, and tightening tool are stretched into the nut tightened in hole 11 and tighten on external terminal 2, L line and N line are reliably fixed on electric connection terminal.
Concrete, as shown in Figure 1-Figure 3, this housing 1 comprises base 1b and upper cover 1a, and this indication window 12 is opened on this upper cover 1a.Above-mentioned lightning protection circuit and tripping mechanism are generally all directly or indirectly arranged on this base 1b, when above-mentioned lightning protection circuit and tripping mechanism and external terminal 2 etc. are installed in after on base 1b, then are covered by this upper cover 1a, complete encapsulation.
Wherein, described tripping mechanism also comprises an elastic supporting mechanism 6; Described elastic supporting mechanism 6 supports described flexible connection piece 7, applies the elastic force departing from described eutectic welding contact to the soldered end of described flexible connection piece 7.Adopt this elastic supporting mechanism 6, can play making the soldered end of flexible connection piece 7 depart from piezo-resistance 3 to power on the effect of pole piece 31 further.The concrete structure of this elastic supporting mechanism 6 is not particularly limited, and in this example, this elastic supporting mechanism 6 comprises the stage clip and superposed support cylinder that are positioned at bottom, and this stage clip is compressed under normal circumstances.Only have when the soldered end on flexible connection piece 7 departs from eutectic welding contact, this stage clip upwards restores, and makes the support cylinder upwards jack-up flexible connection piece 7 of its upper end.
In this example, in the space between former and later two piezo-resistances 3 of resistance branch, an alarm circuit plate 5 is installed; On described alarm circuit plate 5, correspondence is provided with 3 sensitive switches 51.The upper end of described elastic supporting mechanism 6 connects with described flexible connection piece 7, and the lower end of described elastic supporting mechanism 6 connects with described sensitive switch 51.Like this, the action of above-mentioned flexible connection piece 7 will pass to sensitive switch 51 by this elastic supporting mechanism 6, wherein, described lightning protection for power supply also comprises warning output interface 52, described warning output interface 52 is connected with described alarm circuit plate 5, the state of sensitive switch 51 is exported by this warning output interface 52.
In lightning protection power source device, the course of work of tripping mechanism is described below: when lightning protection power source device normally works, flexible connection piece 7 and its piezo-resistance 3 electrode slice 31 are by eutectic welding tin welding, form eutectic welding contact, as shown in Figure 2, Figure 4 shows, the Compress Spring 9 be enclosed within flexible connection piece 7 is compressed by arc-extinguish chamber 8, and elastic supporting mechanism 6 is also compressed downwards by arc-extinguish chamber 8.Now, on shell, indication window 12 is seen into, can't see the color of direction board, and this indication window 12 drives in black.
When lightning protection for power supply deterioration, piezo-resistance 3 can be generated heat, as shown in Fig. 3, Fig. 5, eutectic welding contact is melted, under the effect of flexible connection piece 7 and elastic supporting mechanism 6, flexible connection piece 7 is upspring and is left eutectic welding contact, and Compress Spring 9 promotes arc-extinguish chamber 8 and moves in eutectic welding contact direction forward simultaneously, separate the electric arc that may exist between the electrode slice 31 of soldered end and piezo-resistance 3 on flexible connection piece 7, realize the object of arc extinguishing.Now, on shell, indication window 12 is seen into, just can see the color (for red in this example) of direction board.So just achieve the deteriorated deixis of lightning protection device.
Lightning protection for power supply disclosed in the utility model, due to sheathed on its flexible connection piece 7 in tripping mechanism Compress Spring 9 and arc-extinguish chamber 8, so, when eutectic welding contact departs from welding, described Compress Spring 9 restores, arc-extinguish chamber 8 is passed to eutectic welding contact direction, be enclosed within the soldered end on flexible connection piece 7, make arc-extinguish chamber 8 between the electrode slice 31 and the soldered end of described flexible connection piece 7 of described piezo-resistance 3, add the distance between soldered end to piezo-resistance 3 electrode slice 31 on this flexible connection piece 7; The electric arc that effective elimination flexible connection piece 7 may exist before with piezo-resistance 3 electrode slice 31, realizes the object of arc extinguishing.Meanwhile, the indicating piece 81 on it plays the effect of indicating status, when deterioration appears in lightning protection for power supply, provides the instruction of having lost efficacy, facilitates technical staff to safeguard replacing.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a lightning protection for power supply, comprises housing and the lightning protection circuit that is placed in described housing and tripping mechanism;
Described housing has indication window; Described lightning protection circuit comprises some piezo-resistances;
It is characterized in that, described tripping mechanism comprises flexible connection piece, Compress Spring and arc-extinguish chamber;
Described flexible connection piece is serially connected in described lightning protection circuit; Wherein, one end of described flexible connection piece is soldered end; The electrode slice soldered of the piezo-resistance in described soldered end and described lightning protection circuit, forms eutectic welding contact;
Described Compress Spring and arc-extinguish chamber are enclosed within described flexible connection piece; Described arc-extinguish chamber is between described eutectic welding contact and described Compress Spring; When described flexible connection piece is operated in normal condition, this arc-extinguish chamber extrudes described Compress Spring; When eutectic welding contact departs from welding, described Compress Spring restores, and is passed by arc-extinguish chamber, make arc-extinguish chamber between the electrode slice and the soldered end of described flexible connection piece of described piezo-resistance to eutectic welding contact direction;
Described arc-extinguish chamber is provided with an indicating piece, and described indication window shows this indicating piece state.
2. lightning protection for power supply according to claim 1, is characterized in that, described tripping mechanism also comprises an elastic supporting mechanism; Described elastic supporting mechanism supports described flexible connection piece, applies the elastic force departing from described eutectic welding contact to the soldered end of described flexible connection piece.
3. lightning protection for power supply according to claim 2, is characterized in that, is provided with external terminal in described housing; Described external terminal comprises L external terminal and N external terminal;
Described lightning protection circuit is arranged between described L external terminal and N external terminal.
4. lightning protection for power supply according to claim 3, is characterized in that, described lightning protection circuit comprises resistive module, and described resistive module comprises 3 resistance branch be connected in parallel, and resistance branch described in every bar comprises two or more piezo-resistance;
In each described resistance branch, correspondence arranges a tripping mechanism.
5. lightning protection for power supply according to claim 4, is characterized in that, the resistance branch of described resistive module comprises two piezo-resistances; Flexible connection piece in each tripping mechanism is serially connected between two piezo-resistances;
One alarm circuit plate is installed in the space between former and later two piezo-resistances of resistance branch; On described alarm circuit plate, correspondence is provided with 3 sensitive switches;
The upper end of described elastic supporting mechanism connects with described flexible connection piece, and the lower end of described elastic supporting mechanism connects with described sensitive switch.
6. lightning protection for power supply according to claim 4, is characterized in that, described lightning protection circuit also comprises an air gap, connects with described resistive module in described air gap.
7. lightning protection for power supply according to claim 6, is characterized in that, described lightning protection for power supply also comprises warning output interface, and described warning output interface is connected with described alarm circuit plate.
8. lightning protection for power supply according to claim 1, is characterized in that, the soldered end of described flexible connection piece is provided with link slot; The electrode slice of described piezo-resistance inserts in described link slot, soldered.
9. lightning protection for power supply according to claim 1, is characterized in that, described arc-extinguish chamber is the sleeve of one square, circular, triangle or random appearance.
10. lightning protection for power supply according to claim 9, is characterized in that, described arc-extinguish chamber is a square sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539691.2U CN204835524U (en) | 2015-07-23 | 2015-07-23 | Lightning protection for power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539691.2U CN204835524U (en) | 2015-07-23 | 2015-07-23 | Lightning protection for power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204835524U true CN204835524U (en) | 2015-12-02 |
Family
ID=54693083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520539691.2U Active CN204835524U (en) | 2015-07-23 | 2015-07-23 | Lightning protection for power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204835524U (en) |
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2015
- 2015-07-23 CN CN201520539691.2U patent/CN204835524U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |