CN107611924A - A kind of anti-arc overvoltage protective module and its application - Google Patents

Abstract

The invention discloses a kind of anti-arc overvoltage protective module and its application, including housing, flexible member, preventing arc component, voltage-sensitive component, responding to switch component and temperature-sensitive element.Voltage-sensitive component has close thermal coupling with responding to switch component, when the factors such as the transient surges overvoltage on circuit make voltage-sensitive component hinder the heating of short circuit current persistent fever for some reason, responding to switch component makes the action ejection separation of preventing arc component because of the thermal coupling response of temperature-sensitive element, effectively prevent electric arc caused by switch separation from forming the short circuit overload that electrical breakdown triggers simultaneously, fire and hidden peril of explosion are efficiently avoid, prevents electronic equipment from causing secondary destruction.

Description

A kind of anti-arc overvoltage protective module and its application

Technical field

The present invention relates to a kind of circuit protection device, more particularly to a kind of anti-arc overvoltage protective module and its application.

Background technology

Surge protector or surgesuppressor, are also surge protection device, are a kind of electronics for various sensitivities or costliness Equipment, as the electronic component on computer and communication relevant device provides the protection device of overvoltage security protection.Existing surge Protection device be typically aim under medium or general condition surge overvoltage protection design, so surge overvoltage energy compared with When the small or time is shorter, surge protection device now is unable to the response protection of rapid sensitive, so we would generally be voltage Sensitive protection element such as piezo-resistance are directly applied to realize the purpose of protection electronic circuit on electronic circuit.Conventional pressure-sensitive electricity Resistance is the electronic device for including being made up of Zinc oxide particles and complicated transgranular granular materials, and it is a non-linear to voltage device Part, unique voltage-current characteristic are the preferable protection devices of sensitive electronic circuit, but it material composition determine from Catching fire is easily damaged during overvoltage short circuit overload, catastrophic destruction is produced to neighbouring sensitive electronic circuit and element. So, it would be desirable to a kind of safer more sensitive surge protection device, absorption can be turned within moment, power down of releasing comes through electricity Pressure plays protection electronic equipment effect, and can quick separating surge protection dress when short circuit overload causes surge device to damage Put, avoid causing fire to form catastrophic failure to electronic equipment.

Current existing surge protector or surgesuppressor with arc-suppression function, it is generally using masking and breaking arc Method arc extinguishing, for its separating action using masking and the mode of breaking arc, the Zhe Hu mechanisms in the method need to have one Stroke gets to position masking, breaking arc, can not be in the space of switch time of releasing Shi Zhe arcs mechanism access switch electrode With breaking arc, so, fire, blast are largely overloaded, overheated and finally caused to moment by piezo-resistance under these conditions, this The catastrophic destruction of kind can burn the electronic equipment and element of neighbouring sensitivity, so as to cause whole electronic system collapse damage.

The content of the invention

It is an object of the invention to overcome existing surge protection device lacking when overvoltage causes device short circuit overload Fall into and insufficient, there is provided a kind of anti-arc overvoltage protective module and its application, it can effectively prevent electric arc from producing and in short circuit Energy quick separating, can fundamentally prevent disaster hidden-trouble so as to ensure the safety of electronic equipment during overload.

What the present invention was realized in：

A kind of anti-arc overvoltage protective module, including housing, flexible member, preventing arc component, voltage-sensitive component, response open Close component and temperature-sensitive element；Described housing includes inner casing and enclosing cover；Described inner casing is closed-in construction, and inner casing is provided with electricity Pole hole, electrode foot slot and two chutes；When inner casing is engaged with enclosing cover by way of lock, can be formed in the front of inner casing First cavity, the second cavity can be formed at the back side of inner casing；Wherein electrode foot slot and two chutes is located in the first cavity；Institute The preventing arc component stated includes preventing arc ejection plate and flexible member；Described flexible member is socketed in chute, and is launched with preventing arc The both sides biasing of plate；Described voltage-sensitive component includes at least one voltage sensitive element；Described responding to switch component bag Include temperature-sensitive element, front electrode, tripping electrode and connection electrode；Described tripping electrode by tripping electrode leading foot, cut-off position Circuit is formed with electrode welding end to connect；Described preventing arc component and responding to switch component is arranged in the first cavity, described Voltage sensitive element is arranged in the second cavity；Described electrode lead-out pins include tripping electrode leading foot and second electrode is drawn Pin.

Described voltage sensitive element tow sides are provided with metal electrode film, and described front electrode is located at one of gold Belong on electrode slice, described front electrode is reached in the first cavity by electrode hole by the second cavity, another metal electrode Piece is provided with backplate, and described backplate is placed in the second cavity.

Described tripping electrode leading foot enters the first cavity by electrode foot slot；Inner casing in the second described cavity It is provided with neck；Described second electrode leading foot enters the second cavity by neck；Described backplate is closed by metal The mode of gold solder soldering is connected with the inner circuit that forms of second electrode leading foot；Tripping electrode leading foot and second electrode are drawn Pin outer end, which is stretched out outside inner casing, turns into external pin.

Described front electrode is provided with slotted eye；After slotted eye is stretched out in described connection electrode wherein one end, closed by metal The mode of gold solder soldering or spot welding is connected with front electrode；Described connection electrode, preventing arc ejection plate and tripping electrode, puts In in the first cavity, and it is sequentially placed from top to bottom；Described electrode welding end is another by temperature-sensitive element and positive connection electrode The soldering of end face face forms circuit connection.

Described anti-arc overvoltage protective module also includes the instruction device for indicating the surge protection device state；Described Outer cover is additionally provided with indication window；Described preventing arc ejection plate is additionally provided with instruction device.

As the further explanation of the present invention, described temperature-sensitive element is meltable metal alloy solder or conducting polymer Thing.

As the further explanation of the present invention, described voltage sensitive element is piezoresistor type sensing element or put Electric conduit-type sensing element or discharging gap formula sensing element.

As the further explanation of the present invention, described cut-offs the metal alloy material that position is instant vaporization after a kind of fusing Material.

As the further explanation of the present invention, the metal alloy compositions that position is instant vaporization after a kind of fusing are cut-off, when logical When crossing the transient surges overvoltage for cut-offfing position, overcurrent or short-circuit overload current and exceeding preset threshold value, cut-offfing position can fuse vapour Change, so as to promote tripping electrode leading foot and electrode welding end to separate, that is, realize that surge protection device possesses in short circuit overload electricity Flow down the function of quick disjunction.

As the further explanation of the present invention, temperature-sensitive element is a kind of meltable metal alloy solder, can its preset fusing Temperature threshold, when reaching preset temperature threshold, temperature-sensitive element can melt rapidly.

As the further explanation of the present invention, described instruction device is electric instruction device, such as light emitting diode；Or It is mechanical indication means.

A kind of application of anti-arc overvoltage protective module is as follows：

Two described external pins are connected in the phase line and the neutral conductor or ground wire of circuit；In the power supply system When being worked using surge protection device, responding to switch component connects to form normally closed working condition with voltage-sensitive component, elasticity member Part is in compressive state, as surge protection device normal operating conditions.

If voltage sensitive element electricity caused by leakage current caused by short-circuit overload current or its shelf-life aging on circuit Pressure-sensitive sensing unit temperature rise, this temperature are delivered on front electrode, the temperature-sensitive element for promoting thereon reach preset temperature threshold value and Fusing, preventing arc ejection plate are launched to the direction away from front electrode under the elastic stress effect of flexible member, produced in electric arc It is preceding to be rapidly separated at electrode welding end with connection electrode, and play buffer action；Promote between electrode welding end and connection electrode Form sufficient dielectric strength, the electrical connection thoroughly completely cut off between electrode welding end and connection electrode；

Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened, during instruction on surge protection device Device is moved displacement, and its change different from normal operating conditions can be observed from indication window, so as to indicate that surge is protected Protection unit shielding failure.

If exceed preset threshold value by the transient surges overvoltage, overcurrent or short-circuit overload current of tripping electrode, A moment fusing vaporization of cut-offfing thereon causes tripping electrode leading foot and electrode welding end to separate, while preventing arc ejection plate is by bullet Property element elastic stress act on to away from front electrode direction launch；Tripping electrode leading foot and electrode welding end are completely cut off Between electrical connection；Thoroughly prevent electric arc caused by electrode disjunction from forming electrical breakdown；

Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened, during instruction on surge protection device Device is moved displacement, and its change different from normal operating conditions can be observed from indication window, so as to indicate that surge is protected Protection unit shielding failure.

The beneficial effect that the present invention possesses：

1st, there is anti-arc overvoltage protective module of the invention heated temperature rise moment ejection to depart from, such as by its shelf-life aging The defencive function that caused leakage current and overvoltage short circuit overload moment ejection depart from.

2nd, responding to switch component of the present invention is launched in heated temperature rise moment and departed from, or is departed from short circuit overload moment ejection, Though which kind of disengaging situation, the protection device can moment disjunction, when electric arc does not produce also just have been formed with effect insulation Intensity, thoroughly prevent electric arc from producing, this is not available for current surge protection device.

Brief description of the drawings

Fig. 1 is the combining structure schematic diagram of inner body of the present invention；

Fig. 2 is the structure schematic diagram of inner casing of the present invention；

Fig. 3 is the structural representation of enclosing cover of the present invention；

Fig. 4 is the structural representation of voltage sensitive element of the present invention；

Fig. 5 is the structural representation of second electrode leading foot of the present invention；

Fig. 6 is the structural representation of tripping electrode of the present invention；

Fig. 7 is the structural representation of preventing arc ejection plate of the present invention；

Fig. 8 is the positive structure schematic of inner casing of the present invention；

Fig. 9 is the diagrammatic cross-section of surge protection device normal operating conditions of the present invention；

Figure 10 is the diagrammatic cross-section after surge protection device failure thermal tripping of the present invention；

Figure 11 is the diagrammatic cross-section after surge protection device fault current of the present invention cut-offs.

Marked in figure：1st, inner casing, 1a, the first cavity, 1b, the second cavity, 11, electrode hole, 12, chute, 13, electrode foot inserts Groove, 14, neck, 2, enclosing cover, 2a, indication window, 3, voltage sensitive element, 31, front electrode, 31a, slotted eye, 32, back side electricity Pole, 4, second electrode leading foot, 4a, second electrode leading foot outer end, 4b, second electrode leading foot are inner, and 5, tripping electrode, 5a, tripping electrode leading foot, 5b, cut-off position, 5c, electrode welding end, 6, connection electrode, 7, preventing arc ejection plate, 7a, instruction dress Put, 8, flexible member, 9, temperature-sensitive element.

Embodiment

The present invention is described in more detail with reference to the accompanying drawings and detailed description, but protection scope of the present invention Following preferred embodiment is not limited solely to, it is every to hide tripping electrode by being launched in the present invention to strengthen current interruption The technical scheme of insulation effect, all within the scope of the present invention.

Embodiment 1：

A kind of anti-arc overvoltage protective module, including housing, flexible member 8, preventing arc component, voltage-sensitive component, response Switch module and temperature-sensitive element 9；Described housing includes inner casing 1 and enclosing cover 2；Described inner casing 1 is closed-in construction, and inner casing 1 It is provided with electrode hole 11, electrode foot slot 13 and two chutes 12；When inner casing 1 is engaged with enclosing cover 2 by way of lock, The front of inner casing 1 can form the first cavity 1a, and the second cavity 1b can be formed at the back side of inner casing 1；The wherein He of electrode foot slot 13 Two chutes 12 are located in the first cavity 1a；Described preventing arc component includes preventing arc ejection plate 7 and flexible member 8；Described bullet Property element 8 be socketed in chute 12, and biased with the both sides of preventing arc ejection plate 7；Described voltage-sensitive component includes at least one Individual voltage sensitive element 3；Described responding to switch component includes temperature-sensitive element 9, front electrode 31, tripping electrode 5 and connection electricity Pole 6；Described tripping electrode 5 by tripping electrode leading foot 5a, cut-off a 5b and form circuit with electrode welding end 5c and connect；It is described Preventing arc component and responding to switch component be arranged in the first cavity 1a, described voltage sensitive element 3 is arranged on the second cavity In 1b；Described electrode lead-out pins include tripping electrode leading foot 5a and second electrode leading foot 4.

The described tow sides of voltage sensitive element 3 are provided with metal electrode film, and described front electrode 31 is located at wherein one On individual metal electrode film, described front electrode 31 is reached in the first cavity 1a by electrode hole 11 by the second cavity 1b, separately One metal electrode film is provided with backplate 32, and described backplate 32 is placed in the second cavity 1b.

Described tripping electrode leading foot 5a enters the first cavity 1a by electrode foot slot 13；The second described cavity 1b Interior inner casing 1 is provided with neck 14；Described second electrode leading foot 4 enters the second cavity 1b by neck 14；The described back of the body Face electrode 32 forms circuit with second electrode leading foot the inner 4b by way of metal alloy solder soldering and is connected；Tripping electrode Leading foot 5a and second electrode leading foot outer end 4a, which is stretched out outside inner casing 1, turns into external pin.

Described front electrode 31 is provided with slotted eye 31a；After slotted eye 31a is stretched out in described connection electrode 6 wherein one end, lead to The mode for crossing metal alloy solder soldering is connected with front electrode 31；Described connection electrode 6, preventing arc ejection plate 7 and electricity of threading off Pole 5, it is placed in the first cavity 1a, and is sequentially placed from top to bottom；Described electrode welding end 5c is by temperature-sensitive element 9 and just The other end face soldering of connection electrode 6 forms circuit connection.

Described anti-arc overvoltage protective module also includes the instruction device 7a for indicating the surge protection device state；It is described Enclosing cover 2 on be additionally provided with indication window 2a；Described preventing arc ejection plate 7 is additionally provided with instruction device 7a.

Described temperature-sensitive element 9 is meltable metal alloy solder.

Described voltage sensitive element 3 is piezoresistor type sensing element.

Described cut-offs the metal alloy compositions that a 5b is instant vaporization after a kind of fusing.

The metal alloy compositions that a 5b is instant vaporization after a kind of fusing are cut-off, when the transient surges mistake by cut-offfing a 5b When voltage, overcurrent or short-circuit overload current exceed preset threshold value, cut-offfing a 5b can fuse vaporization, so as to promote tripping electrode Leading foot 5a and electrode welding end 5c separation, that is, realize that surge protection device possesses the work(of the quick disjunction under short-circuit overload current Energy.

Temperature-sensitive element 9 is a kind of meltable metal alloy solder, can it is preset its fusing temperature threshold, it is preset reaching Temperature-sensitive element 9 can melt rapidly during temperature threshold.

Described instruction device 7a is mechanical indication means 7a.

Two described external pins are connected to the phase line and the neutral conductor of circuit；Surge is used in the power supply system When protection device works, responding to switch component connects to form normally closed working condition with voltage-sensitive component, and flexible member 8 is in pressure Contracting state, as surge protection device normal operating conditions.

Embodiment 2：

A kind of another embodiment of anti-arc overvoltage protective module of the present invention.The embodiment have with embodiment Most of component similar structure and usage, the main distinction are：

It is by way of metal alloy solder spot welding and positive after slotted eye 31a is stretched out in described connection electrode 6 wherein one end Electrode 31 connects；Described temperature-sensitive element 9 is meltable conducting polymer；Described voltage sensitive element 3 is quick for electric discharge tubular type Sensing unit；Described instruction device 7a is light emitting diode；Two described external pins be connected to circuit phase line and On ground wire；The working condition of anti-arc overvoltage protective module changes.

When voltage sensitive element 3 caused by leakage current caused by short-circuit overload current or its shelf-life aging on circuit electricity The pressure-sensitive temperature rise of sensing unit 3, this temperature are delivered on front electrode 31, promote temperature-sensitive element 9 thereon to reach preset temperature threshold It is worth and melts, preventing arc ejection plate 7 is launched under the elastic stress effect of flexible member 8 to the direction away from front electrode 31, Electrode welding end 5c and connection electrode 6 are rapidly separated by electric arc before producing, and play buffer action；Promote electrode welding end 5c with The dielectric strength of abundance, the electrical connection thoroughly completely cut off between electrode welding end 5c and connection electrode 6 are formed between connection electrode 6.

Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened, during instruction on surge protection device Device 7a is moved displacement, its change different from normal operating conditions can be observed from indication window 2a, so as to indicate electricity Gush protection device shielding failure.

Embodiment 3：

A kind of another embodiment of anti-arc overvoltage protective module of the present invention.The embodiment have with embodiment Most of component similar structure and usage, the main distinction are：

The working condition of described anti-arc overvoltage protective module changes；Described voltage sensitive element 3 is electric discharge Clearance-type sensing element.

When exceeding preset threshold value by the transient surges overvoltage, overcurrent or short-circuit overload current of tripping electrode 5, The 5b moment vaporization that fuses of cut-offfing thereon causes tripping electrode leading foot 5a and electrode welding end 5c to separate, while preventing arc launches Plate 7 is acted on to the direction away from front electrode 31 by the elastic stress of flexible member 8 and launched；Tripping electrode leading foot 5a is completely cut off Electrical connection between the 5c of electrode welding end；Thoroughly prevent electric arc caused by electrode disjunction from forming electrical breakdown.

Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened, during instruction on surge protection device Device 7a is moved displacement, its change different from normal operating conditions can be observed from indication window 2a, so as to indicate electricity Gush protection device shielding failure.

Claims (9)

1. a kind of anti-arc overvoltage protective module, including housing, flexible member (8), preventing arc component, voltage-sensitive component, response Switch module and temperature-sensitive element (9)；It is characterized in that：Described housing includes inner casing (1) and enclosing cover (2)；Described inner casing (1) For closed-in construction, and inner casing (1) is provided with electrode hole (11), electrode foot slot (13) and two chutes (12)；When inner casing (1) with When enclosing cover (2) is engaged by way of lock, the first cavity (1a) can be formed in the front of inner casing (1), at the back side of inner casing (1) The second cavity (1b) can be formed；Wherein electrode foot slot (13) and two chutes (12) are located in the first cavity (1a)；Described Preventing arc component includes preventing arc ejection plate (7) and flexible member (8)；Described flexible member (8) is socketed in chute (12), and with The both sides biasing of preventing arc ejection plate (7)；Described voltage-sensitive component includes at least one voltage sensitive element (3)；Described Responding to switch component includes temperature-sensitive element (9), front electrode (31), tripping electrode (5) and connection electrode (6)；Described dropout Electrode (5) by tripping electrode leading foot (5a), cut-off position (5b) and form circuit with electrode welding end (5c) and connect；Described preventing arc Component and responding to switch component are arranged in the first cavity (1a), and described voltage sensitive element (3) is arranged on the second cavity In (1b)；Described electrode lead-out pins include tripping electrode leading foot (5a) and second electrode leading foot (4).

A kind of 2. anti-arc overvoltage protective module according to claim 1, it is characterised in that：Described voltage sensitive element (3) tow sides are provided with metal electrode film, and described front electrode (31) is located on one of metal electrode film, it is described just Face electrode (31) is reached in the first cavity (1a) by electrode hole (11) by the second cavity (1b), on another metal electrode film Provided with backplate (32), described backplate (32) is placed in the second cavity (1b).

A kind of 3. anti-arc overvoltage protective module according to claim 1, it is characterised in that：Described tripping electrode is drawn Pin (5a) enters the first cavity (1a) by electrode foot slot (13)；Inner casing (1) in described the second cavity (1b) is provided with Neck (14)；Described second electrode leading foot (4) enters the second cavity (1b) by neck (14)；Described backplate (32) circuit is formed with second electrode leading foot inner (4b) by way of metal alloy solder soldering to be connected；Tripping electrode draws Go out pin (5a) and second electrode leading foot outer end (4a) stretches out inner casing (1) and turns into external pin outside.

A kind of 4. anti-arc overvoltage protective module according to claim 2, it is characterised in that：Described front electrode (31) It is provided with slotted eye (31a)；After slotted eye (31a) is stretched out in described connection electrode (6) wherein one end, pass through metal alloy solder soldering Or the mode of spot welding is connected with front electrode (31)；Described connection electrode (6), preventing arc ejection plate (7) and tripping electrode (5), It is placed in the first cavity (1a), and is sequentially placed from top to bottom；Described electrode welding end (5c) by temperature-sensitive element (9) with The soldering of positive connection electrode (6) other end face forms circuit connection.

A kind of 5. anti-arc overvoltage protective module according to claim 1, it is characterised in that：Described anti-arc overvoltage is protected Protect the instruction device (7a) that module also includes indicating the surge protection device state；Indicating window is additionally provided with described enclosing cover (2) Mouth (2a)；Described preventing arc ejection plate (7) is additionally provided with instruction device (7a).

A kind of 6. anti-arc overvoltage protective module according to claim 1, it is characterised in that：Described temperature-sensitive element (9) It is meltable metal alloy solder or conducting polymer；Described voltage sensitive element (3) be piezoresistor type sensing element or Person's electric discharge tubular type sensing element or discharging gap formula sensing element；Described position (5b) of cut-offfing is moment vapour after a kind of fusing The metal alloy compositions of change.

A kind of 7. application of anti-arc overvoltage protective module according to any one of claims 1 to 6, it is characterised in that：By institute Two external pins stated are connected in the phase line and the neutral conductor or ground wire of circuit；Surge protection is used in the power supply system When device works, responding to switch component connects to form normally closed working condition with voltage-sensitive component, and flexible member (8) is in compression State, as surge protection device normal operating conditions.

A kind of 8. application of anti-arc overvoltage protective module according to claim 7, it is characterised in that：If voltage-sensitive is first Part (3) voltage sensitive element (3) temperature rise caused by leakage current caused by short-circuit overload current or its shelf-life aging on circuit, This temperature is delivered on front electrode (31), promotes temperature-sensitive element (9) thereon to reach preset temperature threshold value and melt, preventing arc Ejection plate (7) is launched under the elastic stress effect of flexible member (8) to the direction away from front electrode (31), is produced in electric arc It is preceding to be rapidly separated electrode welding end (5c) and connection electrode (6), and play buffer action；Promote electrode welding end (5c) with connecting The dielectric strength of abundance is formed between receiving electrode (6), has thoroughly completely cut off being electrically connected between electrode welding end (5c) and connection electrode (6) Connect；

Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened, during instruction device on surge protection device (7a) is moved displacement, its change different from normal operating conditions can be observed from indication window (2a), so as to indicate electricity Gush protection device shielding failure.

A kind of 9. application of anti-arc overvoltage protective module according to claim 7, it is characterised in that：If pass through electricity of threading off When transient surges overvoltage, overcurrent or the short-circuit overload current of pole (5) exceed preset threshold value, thereon cut-off position (5b) wink Between fusing vaporization cause tripping electrode leading foot (5a) and electrode welding end (5c) separation, while preventing arc ejection plate (7) is by elasticity The elastic stress of element (8) acts on to be launched to the direction away from front electrode (31)；Completely cut off tripping electrode leading foot (5a) and Electrical connection between electrode welding end (5c)；Thoroughly prevent electric arc caused by electrode disjunction from forming electrical breakdown；

Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened, during instruction device on surge protection device (7a) is moved displacement, its change different from normal operating conditions can be observed from indication window (2a), so as to indicate electricity Gush protection device shielding failure.