CN100372203C - Electrophoresis protector - Google Patents

Abstract

The present invention relates to an electric surge protector which comprises a casing with a wire plugged opening and an air outlet, a metal clamping plate, a wire holder, a connecting plate, an electrode and an arc extinguishing cover. The present invention is characterized in that the electrode comprises two main electrodes made from copper tungsten alloy, an auxiliary trigger electrode and an arc striking electrode. Each of the main electrodes is in a flat U shape, is positioned on a support frame, and is placed to present a straight line. The U-shaped openings are outward. A gap exists between the vertical sections of the two electrodes and presents an angle. The horizontal section on the upper side is an arc striking section. The auxiliary trigger electrode is positioned on the outer side of the gap between the vertical sections of the two main electrodes, and forms a gap between the two main electrodes. Thin walls made form semiconductor plastic, which have equal distances with air gaps are arranged at air gap positions between the main electrodes, and between each of the main electrodes and the auxiliary trigger electrode. The arc striking electrode is positioned on the arc extinguishing cover which is composed of a plurality of metal arc extinguishing sheets. The arc extinguishing sheet at the middle is an arc striking electrode. The electric surge protector also comprises an electronic ignition device which triggers the auxiliary electrode and the main electrodes to discharge electricity so that the two main electrodes discharge electricity.

Description

Surge protector

Technical field

The present invention relates to a kind of surge protector, relate in particular to a kind of low tension surge protector.

Background technology

Along with progress of science and technology, the 21 century mankind will enter the information age, advanced electronic products such as network, monitoring, measurement, protection, control, telecommunications and computer are applied in the various systems of information industry, communications and transportation, electric power, government affairs office, financial instrument, automobile making, petrochemical industry and residential houses just increasingly extensively; Various electric elements in the low-voltage distribution system are just progressively realized intelligent, have consequently selected the electronic component that a large amount of withstand voltages are low, sensitiveness is high for use.Lightning overvoltage and switching overvoltage will be brought fatal infringement to these electronic components, thereby the range, frequency, the degree of depth that make overvoltage destroy unprecedentedly strengthen, according to incompletely statistics, China causes annual to lose more than 200,000,000 yuan because of lightning overvoltage and switching overvoltage.

In order to prevent the damage of lightning overvoltage and switching overvoltage to electronic and electrical equipment, improve the security reliability of system, various surge protectors (hereinafter to be referred as SPD) have appearred.More typically have: the voltage switch type SPD of the voltage switch type SPD of discharging gap, the voltage limit type SPD of metal zinc oxide, gas discharge cast.The protected mode of these SPD all has certain limitation or deficiency.Though can bear the big capacity impulse current (waveform is approximately 10/350 μ s) of formation such as direct stroke as the voltage switch type SPD of discharging gap, there is the deboost height, disconnect the low shortcoming of afterflow ability of electrical network; The voltage limit type SPD of metal zinc oxide can only bear the low capacity electric current of 8/20 μ s waveform, and the inevitable aging of product and junction capacitance height; The voltage switch type SPD of gas discharge cast does not then have the ability that disconnects afterflow.

Summary of the invention

The purpose of this invention is to provide a kind of low tension surge protector.Metal with two identical inclined to one side shape U shapes is staggered relatively as main electrode, make it to bear big capacity impulse current, increase the plastic semiconductor thin slice, make it to have lower stable arcing voltage, the arc-extinguish chamber that has arc electrode is arranged, make it to have the ability that disconnects afterflow preferably.

Another object of the present invention provides a kind of low tension surge protector, reduces, sets and control the deboost of surge protector by the igniter that increases an electron type.

In order to achieve the above object, the present invention adopts following technical scheme:

A kind of surge protector comprises having shell, metal clamp, junction block, connecting plate, electrode and the arc-extinguish chamber that lead inserts mouth and venthole, is characterized in,

Described electrode comprises two main electrodes i.e. first electrode and second electrode, and an auxiliary triggering electrode is that third electrode and an arc electrode are the 4th electrode;

Described first electrode and second electrode are all an inclined to one side shape U shape, be positioned on the support in a straight line place, the opening of U-shaped is outside, a gap is arranged between vertical section of two electrodes and be an angle, the horizontal segment of upside is the striking section;

Described third electrode is positioned at the vertically gap location outside of section of described the one the second electrodes, with described first, second electrode one gap is arranged;

Place, air gap at described first electrode and described second electrode, described first electrode and described third electrode, described second electrode and described third electrode is equipped with and the equidistant thin-walled made from plastic semiconductor in air gap;

Described arc electrode i.e. the 4th electrode is positioned on the described arc-extinguish chamber, and described arc-extinguish chamber is made up of several pieces metal arc quenching plates, and middle a slice arc quenching plate is described the 4th electrode.

Described first electrode and second electrode vertically are 34 ° of angles between the section, and described first, second electrode is a copper-tungsten.

Described third electrode equates respectively with the second interelectrode air gap and plastic semiconductor thin-walled with the first interelectrode air gap and plastic semiconductor thin-walled, third electrode, greater than first electrode and the second interelectrode air gap and plastic semiconductor thin-walled herein.

On the described support holddown groove is arranged, described first, second is fixedly mounted on the holddown groove of described support with third electrode, and described first electrode and described second gaps between electrodes and described third electrode and described first, second gaps between electrodes are determined by the position that changes described holddown groove.

The material of described support is a plastic semiconductor.

Described third electrode and described the 4th electrode equipotential.

Described arc-extinguish chamber is made up of 17 metal arc quenching plates, and middle a slice metal arc quenching plate is described the 4th electrode.

Arc quenching plate as the 4th electrode in the described arc-extinguish chamber is the Y shape of pectination, and all the other 16 is the pectination plate, and thickness is 1mm～1.5mm, and the distance between the described arc quenching plate is 1.5mm～2mm.

Described surge protector also comprises an electronic ignition device, and two inputs and an output are arranged, and two inputs are connected with described second electrode with described first electrode respectively, and an output is connected with described third electrode; This igniter triggers the described third electrode and described first or second electrode discharge, and causes described first, second electrode discharge.

Described electronic ignition device is a mutual inductance step-up coil, and major loop comprises electric capacity and a resistance, and subloop is output.

Described electronic ignition device also comprises a discharge tube.

Be parallel with a dichromatic LED in the major loop of described electronic ignition device.

Described electronic ignition device, its circuit board has a metallic shield outward.

Described surge protector comprises following structure:

Described shell is " protruding " shape, and a breach is arranged at the bottom, can be contained on the attachment rail, and both sides have lead to insert mouth and venthole;

Described metal card strip is positioned at a side of described outer casing bottom breach by spring, described shell can be fixed on the attachment rail;

Described junction block is positioned at the both sides, inside of described shell, and the lead on the described shell of position alignment inserts mouth;

Described first, second installed and the location by described support with third electrode, is positioned at the centre position of described enclosure cavity;

Described arc-extinguish chamber and described the 4th electrode are positioned at the below of described first, second and third electrode;

Described connecting plate connects described junction block and described first, second electrode, and is screwed.

Described surge protector also comprises:

Place described electronic ignition device in the upper cavity in described " protruding " shape shell.

In the technical scheme of the present invention, staggered relatively with the metal of two identical inclined to one side shape U shapes as main electrode, constitute the spark gap of standard, bear the big capacity impulse current (waveform is approximately 10/350 μ s) of formation such as direct stroke; Place, air gap at main electrode and auxiliary triggering electrode is placed with and the equidistant dielectric made from plastic semiconductor in air gap, obtains a stable arcing voltage low than air breakdown voltage; The arc-extinguish chamber that has arc electrode will significantly improve the ability of the disconnection afterflow of surge protector.Is that the auxiliary triggering electrode produces high voltage with electronic ignition device to the third electrode of surge protector, reduces, sets and control the deboost of SPD.

Description of drawings

Fig. 1 is the sectional structure chart of an embodiment of surge protector of the present invention;

Fig. 2 is the shell schematic diagram of the foregoing description;

Fig. 3 is the stereogram of first, second and the third electrode of the foregoing description;

Fig. 4 is the end view of first, second and the third electrode of the foregoing description;

Fig. 5 is the arc-extinguish chamber of the foregoing description and the sectional structure chart of the 4th electrode;

Fig. 6 is the circuit diagram of an embodiment of electronic ignition device of the present invention.

Embodiment

Further specify technical scheme of the present invention below in conjunction with drawings and Examples.

Fig. 1 is the structure chart of one embodiment of the present of invention, and as shown in Figure 1, surge protector of the present invention comprises following structure:

Shell 10 is " protruding " shape, and a breach 11 is arranged at the bottom, can be contained in attachment rail on, both sides have lead to insert mouthfuls 12 and venthole 13, venthole 13 is used to discharge air-flow and the heat that electric arc produces;

Metal clamp 14 has spring, is positioned at a side of shell 10 bottom notch 11, shell 10 can be fixed on the attachment rail, and the surge protector of this embodiment is installed on the attachment rail of TH35-7.5 type;

Junction block 15 is positioned at the both sides, inside of shell 10, and the lead on the position alignment shell 10 inserts mouth 12;

First, second is connected by support with third electrode, is positioned at the centre position of shell 10 internal cavities;

Arc-extinguish chamber and the 4th electrode are positioned at the below of first, second and third electrode;

Connecting plate 16 connects junction block 15 and first, second electrode, and fixing with screw 17.

Fig. 2 is the shell schematic diagram of the foregoing description, as can be seen from Fig. 2 lead patchhole 12 on the shell 10 and venthole 13.

The characteristics of surge protector of the present invention are that electrode comprises two main electrodes i.e. first electrode and second electrode, and an auxiliary triggering electrode is that third electrode and an arc electrode are the 4th electrode.Fig. 3 and Fig. 4 are stereogram and the end views of an embodiment of first, second and third electrode among the embodiment shown in Figure 1.

As shown in Figure 3 and Figure 4, among this embodiment, first electrode 31 and second electrode 32 are all an inclined to one side shape U shape, material is a copper-tungsten, is positioned to be straight line placement on the support 34, and the opening of U-shaped is outside, one gap is arranged between vertical section of two electrodes and be an angle, among this embodiment, this angle is 34 °, and the horizontal segment of two electrode upsides is the striking section;

Third electrode 33 is positioned at the gap location outside of first electrode 31 and second electrode, 32 vertical sections, and a gap is all arranged between first, second electrode; Place, air gap at first electrode 31 and second electrode 32, first electrode 31 and third electrode 33, second electrode 32 and third electrode 33 is equipped with and the equidistant thin-walled made from plastic semiconductor 35 in air gap.Third electrode 33 equates respectively with the air gap and the plastic semiconductor thin-walled of 32 at second electrode with first electrode 31, third electrode 33, but greater than air gap and plastic semiconductor thin-walled between first electrode 31 and second electrode 32.The dielectric coefficient of plastic semiconductor is lower than air, therefore can obtain an arcing voltage low than air breakdown voltage, and the resistance tocrocking of plastic semiconductor is stronger than air, and arcing voltage is more stable.

Support 34 is made by plastic semiconductor.On the support 34 holddown groove is arranged, first, second and third electrode are fixedly mounted on the holddown groove of support 34, gap between first electrode 31 and second electrode 32 and third electrode 33 and first, second gaps between electrodes are determined by changing their positions on support 34, promptly are the positions that changes holddown groove on the support.

Arc electrode i.e. the 4th electrode is positioned on the arc-extinguish chamber 50, and arc-extinguish chamber 50 is made up of several pieces metal arc quenching plates 52, and middle a slice arc quenching plate is the 4th electrode 51.Arc-extinguish chamber 50 is positioned at the positive lower end that main electrode is first electrode 31 and second electrode 32.

Fig. 5 is the arc-extinguish chamber 50 of the foregoing description and the sectional structure chart of the 4th electrode 51.Among this embodiment, arc-extinguish chamber 50 is made up of 17 metal arc quenching plates, and middle a slice metal arc quenching plate is the 4th electrode 51.The arc quenching plate shape has two kinds, and the arc quenching plate as the 4th electrode 51 in the arc-extinguish chamber 50 is the Y shape of pectination, and in the middle of being positioned at, all the other 16 arc quenching plates 52 are the pectination plate, and thickness is 1mm～1.5mm, and the distance between the arc quenching plate is 1.5mm～2mm.The pectination arc quenching plate can more effectively be separated electric arc, and the function of cooling and deionization is arranged, and has significantly improved the ability of the disconnection afterflow of surge protector.

Third electrode 33 and the 4th electrode 51 equipotentials among this embodiment.Its operation principle is as follows: the current potential of arc electrode the 4th electrode 51 and third electrode 33 equipotentials, third electrode 33 place the outside, gap of first electrode 31 and second electrode 32.When the overvoltage in the external world reaches certain value, third electrode 33 obtains to be several times as much as superpotential voltage, air gap between the third electrode 33 and first electrode 31 and second the electrode 32 and plastic semiconductor thin-walled is breakdown and produce electric arc, under the effect of electric power and thermal current, electric arc moves to first electrode 31 and second electrode, 32 centers, the striking section of the angle between main electrode, horizontal direction and the 4th electrode 52 make electric arc speed away downwards, move to both sides along electrode, and electric arc is elongated rapidly.After electric arc enters arc-extinguish chamber 50, just cut apart and eliminate, so just finished striking and extinguished afterflow electric arc, reached the purpose of overvoltage protection by arc quenching plate.

In this embodiment, be in the surge protector shell of " protruding " shape, top also has a cavity, can place an electronic ignition device herein, is the servicing unit of surge protector, is used to reduce, set and control the deboost of surge protector.When occurring overvoltage in the loop and reaching determined value, one of output generation at electronic ignition device is several times as much as superpotential voltage, this voltage is applied on the auxiliary electrode, auxiliary electrode and main electrode discharge, thereby cause the discharge of two main electrodes, carry out earial drainage, make overvoltage can discharge and be limited in the low scope.

The electronic ignition device of installing in the above-described embodiments has two inputs and an output, and two inputs are connected with second electrode 32 with first electrode 31 respectively, and an output is connected with described third electrode 33.

Fig. 6 is the circuit diagram of an embodiment of electronic ignition device of the present invention.Among the embodiment as shown in Figure 6, igniter is a mutual inductance step-up coil 62, and its major loop comprises a resistance 61, an electric capacity 63, subloop is its output 65, it is input as 67,68, is connected respectively on two main electrodes 31,32 the output 65 subloop two ends of taking from mutual inductance step-up coil 62.Among this embodiment; also comprise a discharge tube 64, this discharge tube 64 is as the control switch of igniter, because the dc breakdown voltage parameter difference of different discharge tubes; if adopt the discharge tube of different parameters, just can obtain the surge protector of different deboosts.Also be parallel with a dichromatic LED 66 in the major loop of this embodiment, this diode 66 has two kinds of luminances, and normal (green) state of indicating circuit and circuit are in state (redness) respectively.

In RLC series circuit shown in Figure 6, when input overvoltage occurred and reaches certain value, when equaling the natural frequency of this resonance as if the operating frequency in the circuit, resonance phenomena will take place.Quality factor during circuit generation resonance are:

$Q=\frac{\mathrm{wL}}{R}=\frac{1}{\mathrm{wCR}}=\frac{1}{R}\sqrt{\frac{L}{C}}$

This embodiment has taked the design of substep booster tension, use a discharge tube as control switch, adopt the discharge tube of different parameters just can obtain different deboosts, by selecting parameters R, L, C, can change the value of Q, thereby on the mutual inductance step-up coil, obtain higher voltage, enough trigger main electrode in order to ensure the voltage of exporting, by the mutual inductance step-up coil this voltage is promoted further, output voltage is just taken from the subloop of mutual inductance step-up coil.Just be based on this principle, electronic ignition device can produce high voltage, and high voltage is applied on the auxiliary electrode, triggers to make the main electrode discharge.Also have a dichromatic LED to be connected in parallel on during above-mentioned master goes the same way in addition, indicate the different conditions of electronic ignition device with different colors.To those skilled in the art, the high voltage that can also use additive method to obtain output certainly triggers the main electrode discharge.

Owing to adopted technical scheme of the present invention, as main electrode, the spark gap of formation standard bears the big capacity impulse current (waveform is approximately 10/350 μ s) of formation such as direct stroke with the metal of two identical inclined to one side shape U shapes; Place, air gap at main electrode and auxiliary triggering electrode is placed with and the equidistant dielectric made from plastic semiconductor in air gap, obtains an arcing voltage low than air breakdown voltage; First electrode becomes inclined to one side shape U shape with second electrode design, and the arc-extinguish chamber that has arc electrode, will significantly improve the ability of the disconnection afterflow of surge protector.The third electrode that produces surge protector with electronic ignition device is the auxiliary triggering electrode, reduces, sets and control response time and the deboost of SPD.

The foregoing description provides to being familiar with the person in the art and realizes or use of the present invention; those skilled in the art can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that the claim style of calligraphy arrives.

Claims (15)

1. a surge protector comprises having shell, metal clamp, junction block, connecting plate, electrode and the arc-extinguish chamber that lead inserts mouth and venthole, it is characterized in that,

Described electrode comprises two main electrodes i.e. first electrode and second electrode, and an auxiliary triggering electrode is that third electrode and an arc electrode are the 4th electrode;

Described first electrode and second electrode are all an inclined to one side shape U shape, are positioned to be straight line placement on the support, and the opening of U-shaped is outside, a gap is arranged between vertical section of two electrodes and be an angle, and the horizontal segment of upside is the striking section;

Described third electrode is positioned at the vertically gap location outside of section of described first, second electrode, with described first, second electrode one gap is arranged;

Place, air gap at described first electrode and described second electrode, described first electrode and described third electrode, described second electrode and described third electrode is equipped with and the equidistant thin-walled made from plastic semiconductor in air gap;

Described arc electrode i.e. the 4th electrode is positioned on the described arc-extinguish chamber, and described arc-extinguish chamber is made up of several pieces metal arc quenching plates, and middle a slice arc quenching plate is described the 4th electrode.

2. surge protector as claimed in claim 1 is characterized in that, described first electrode and second electrode vertically are 34 ° of angles between the section, and described first, second electrode is a copper-tungsten.

3. surge protector as claimed in claim 1; it is characterized in that; described third electrode equates respectively with the second interelectrode air gap and plastic semiconductor thin-walled with the first interelectrode air gap and plastic semiconductor thin-walled, third electrode, greater than first electrode and the second interelectrode air gap and plastic semiconductor thin-walled herein.

4. surge protector as claimed in claim 1; it is characterized in that; on the described support holddown groove is arranged; described first, second is fixedly mounted on the holddown groove of described support with third electrode, and described first electrode and described second gaps between electrodes and described third electrode and described first, second gaps between electrodes are determined by the position that changes described holddown groove.

5. surge protector as claimed in claim 4 is characterized in that, the material of described support is a plastic semiconductor.

6. surge protector as claimed in claim 1 is characterized in that, described third electrode and described the 4th electrode equipotential.

7. surge protector as claimed in claim 1 is characterized in that, described arc-extinguish chamber is made up of 17 metal arc quenching plates, and middle a slice metal arc quenching plate is described the 4th electrode.

8. surge protector as claimed in claim 1 is characterized in that, the arc quenching plate as the 4th electrode in the described arc-extinguish chamber is the Y shape of pectination, and all the other 16 is the pectination plate, and thickness is 1mm～1.5mm, and the distance between the described arc quenching plate is 1.5mm～2mm.

9. as any described surge protector in the claim 1 to 8, it is characterized in that, described surge protector also comprises an electronic ignition device, two inputs and an output are arranged, two inputs are connected with described second electrode with described first electrode respectively, and an output is connected with described third electrode; This igniter triggers the described third electrode and described first or second electrode discharge, and causes described first, second electrode discharge.

10. surge protector as claimed in claim 9 is characterized in that, described electronic ignition device is a mutual inductance step-up coil, and major loop comprises electric capacity and a resistance, and subloop is output.

11. surge protector as claimed in claim 10 is characterized in that, described electronic ignition device also comprises a discharge tube.

12. surge protector as claimed in claim 10 is characterized in that, is parallel with a dichromatic LED in the major loop of described electronic ignition device.

13. surge protector as claimed in claim 10 is characterized in that, described electronic ignition device, and its circuit board has a metallic shield outward.

14. as any described surge protector in the claim 1 to 8, it is characterized in that, comprise following structure:

Described shell is " protruding " shape, and a breach is arranged at the bottom, can be contained on the attachment rail, and both sides have lead to insert mouth and venthole;

Described metal card strip has spring, is positioned at a side of described outer casing bottom breach, described shell can be fixed on the attachment rail;

Described junction block is positioned at the both sides, inside of described shell, and the lead on the described shell of position alignment inserts mouth;

Described first, second installed and the location by described support with third electrode, is positioned at the centre position of described enclosure cavity;

Described arc-extinguish chamber and described the 4th electrode are positioned at the below of described first, second and third electrode;

Described connecting plate connects described junction block and described first, second electrode, and is screwed.

15. surge protector as claimed in claim 9 is characterized in that, comprises following structure:

Described shell is " protruding " shape, and a breach is arranged at the bottom, can be contained on the attachment rail, and both sides have lead to insert mouth and venthole;

Described metal card strip has spring, is positioned at a side of described outer casing bottom breach, described shell can be fixed on the attachment rail;

Described junction block is positioned at the both sides, inside of described shell, and the lead on the described shell of position alignment inserts mouth;

Described first, second installed and the location by described support with third electrode, is positioned at the centre position of described enclosure cavity;

Described arc-extinguish chamber and described the 4th electrode are positioned at the below of described first, second and third electrode;

Described connecting plate connects described junction block and described first, second electrode, and is screwed;

Place described electronic ignition device in the upper cavity in described " protruding " shape shell.

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