CN209912640U

CN209912640U - Diversion electrode, surge protection assembly and surge protector

Info

Publication number: CN209912640U
Application number: CN201920745265.2U
Authority: CN
Inventors: 谢加洋; 雷昆明
Original assignee: Chongqing Saifu Electric Appliance Co Ltd
Current assignee: Chongqing Saifu Electric Appliance Co Ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-01-07
Anticipated expiration: 2029-05-23

Abstract

The utility model provides a water conservancy diversion electrode, surge protection subassembly and surge protector, enclose into the drainage piece in the space including outer lane electrode ring and being located outer lane electrode ring, it is gapped between drainage piece and the outer lane electrode ring, this drainage piece passes through the flow deflector with outer lane electrode ring and is connected, be connected to the drainage foot that is used for outside drainage on the outer lane electrode ring. When the device is used, the flow guide electrodes are arranged at two ends of the piezoresistor, the outer ring forms a large-area ring, the inner part of the piezoresistor forms a drainage sheet with a smaller area, a gap is formed between the outer ring electrode ring and the drainage sheet, and the middle gap can enable the piezoresistor to dissipate heat to form a uniform state under the conditions of large-current discharge and power frequency voltage all the time, so that the phenomena of hole melting and breakdown due to unbalanced local temperature difference can be avoided; when the piezoresistor breaks down, the heat is transmitted out through self heat dissipation and the diversion electrode, so that the internal separation mechanism can be quickly separated, the tripping rate is improved, and the operation safety of a power grid is ensured.

Description

Diversion electrode, surge protection assembly and surge protector

Technical Field

The utility model belongs to the technical field of the thunder and lightning battery pulse protection, in particular to water conservancy diversion electrode, surge protection subassembly and surge protector.

Background

A surge protector SPD, also called a lightning protector, is an electronic device that provides safety protection for various electronic devices, instruments and meters, and communication lines. When the peak current or the voltage is suddenly generated in the electric loop or the communication line due to the external interference, the surge protector can conduct and shunt in a very short time, so that the damage of the surge to other equipment in the loop is avoided. The device comprises a flow guide electrode, a piezoresistor, a tripping assembly and the like. The diversion electrode is welded on the surface of the component and is mainly used for drainage and discharge.

In the prior art, the flow guide electrode with a small cross section has small application sectional area, so that the discharge capacity of lightning current is influenced, instantaneous breakdown and explosion phenomena are caused due to untimely lightning current discharge, and meanwhile, the molten hole breakdown is caused due to unbalanced heating of the surface caused by rapid metal heat transfer in the heat dissipation process. But the heat dissipation surface of the component is large, and the component and the electrode can act to enable the temperature to reach the temperature of the tripping device after the component fails, so that accidents are prevented.

The traditional electrode with large sectional area has large electrode sectional area and higher lightning current discharge capacity, can bear instantaneous large current impact, and is not easy to break down and explode. However, the heat dissipation capacity of the components is reduced due to the full coverage of the electrode area, so that the internal heat consumption is increased, the heat dissipation is reduced due to the fact that the components are hung in a power grid environment for a long time and the power consumption is increased under the action of power frequency current, the service life of the electrical components is shortened, meanwhile, due to the fact that heat dissipation is from inside to outside, if the phenomenon that a tripping device cannot reach the separation temperature timely and short circuit fire and the like are caused possibly occurs only by metal heat transfer, the tripping rate is reduced, and therefore protection failure is caused.

Because different manufacturers have different production requirements, the material selection and processing of the guide electrode are different, some guide electrodes are small pins, and some guide electrodes are full-covered, so that the through-flow capacity of some surge protectors is small, the surface temperature difference is large, and the phenomena of hole melting and breakdown are generated. Meanwhile, the piezoresistor has low self heat power consumption and unbalanced surface temperature difference, so that the phenomenon of short circuit of the piezoresistor cannot be released in time, and the fire hazard and the like are easily caused.

SUMMERY OF THE UTILITY MODEL

In view of the above the not enough of prior art, the utility model aims to provide a diversion electrode does benefit to the heat dissipation, improves the dropout rate.

In order to realize above-mentioned purpose and other relevant purposes, the utility model provides a diversion electrode, enclose into the drainage piece in the space including outer lane electrode ring and being located outer lane electrode ring, it is gapped between drainage piece and the outer lane electrode ring, this drainage piece passes through the flow deflector with outer lane electrode ring and is connected, be connected to the drainage foot that is used for outside drainage on the outer lane electrode ring.

By adopting the structure, when in use, the flow guide electrodes are arranged at two ends of the piezoresistor, the outer ring forms a large-area ring, the inner part forms a small-area drainage sheet, a gap is formed between the outer ring electrode ring and the drainage sheet, and the middle gap can enable the piezoresistor to radiate to form a uniform state on the surface under the conditions of large current discharge and power frequency voltage all the time, so that the phenomena of hole melting and breakdown caused by unbalanced local temperature difference can be avoided; when the piezoresistor breaks down, the heat is transmitted out through self heat dissipation and the diversion electrode, so that the internal separation mechanism can be quickly separated, the tripping rate is improved, and the operation safety of a power grid is ensured.

Optionally, the drainage piece, the outer ring electrode ring, the flow deflector and the drainage pin are integrally formed.

Optionally, the current-guiding electrode is made of copper, and the outer surface of the current-guiding electrode is provided with a silver coating.

Optionally, the position of the drainage pin on the outer ring electrode ring is opposite to or staggered with the position of the flow deflector on the outer ring electrode ring.

Optionally, the current guiding sheet is located at the center of the outer ring electrode ring.

Optionally, the outer ring electrode ring is a circular ring, a rectangular ring or an elliptical ring; the drainage sheet is rectangular, circular or elliptical.

The utility model also provides a surge protection subassembly, include the casing and establish piezo-resistor and tripping device on the casing, still include the water conservancy diversion electrode, the water conservancy diversion electrode is two, two the water conservancy diversion electrode is connected at the piezo-resistor both ends, every the drainage piece of water conservancy diversion electrode is located the center of piezo-resistor terminal surface.

Optionally, the surge protection assembly further includes a first electrode pin and a second electrode pin extending out of the housing, the first electrode pin is connected to one of the current conducting electrodes, and the other current conducting electrode is connected to the second electrode pin through a conductive elastic sheet.

Optionally, the conductive elastic sheet is welded to the current-conducting electrode, the tripping mechanism includes an elastic element and a swinging component rotatably mounted on the housing, the swinging component has a swinging arm, one end of the elastic element is connected to the housing, the other end of the elastic element is connected to the swinging component, and the elastic force of the elastic element makes the swinging arm abut against the conductive elastic sheet.

The utility model also provides a surge protector, including the surge protection subassembly, still include the base, be provided with the socket that is used for holding the slot of surge protection subassembly and is used for being connected with surge protection subassembly electricity on the base, the surge protection subassembly is installed in the slot, first electrode pin and second electrode pin insert in the socket that corresponds.

As mentioned above, the utility model has the advantages that: the utility model discloses, when using, the water conservancy diversion electrode is installed at piezo-resistor both ends, and the outer lane forms a large tracts of land ring, and inside a drainage piece of less area, the outer lane electrode ring forms the space with between the drainage piece, and the intermediate space can make piezo-resistor self heat dissipation form one can be in a uniform state all the time when heavy current is released and power frequency voltage lower surface, can not produce local difference in temperature unbalance and appear melting hole, puncture phenomenon; when the piezoresistor breaks down, the heat is transmitted out through self heat dissipation and the diversion electrode, so that the internal separation mechanism can be quickly separated, the tripping rate is improved, and the operation safety of a power grid is ensured.

Drawings

Fig. 1 is a schematic structural view of the current-guiding electrode of the present invention;

fig. 2 and 3 are schematic views of another embodiment of the current-conducting electrode of the present invention;

fig. 4 is a schematic structural diagram of the surge protection assembly of the present invention;

fig. 5 is a rear view of the surge protection assembly of the present invention;

fig. 6 is a schematic structural diagram of the surge protector of the present invention.

Part number description:

10-outer ring electrode ring; 11-a drainage sheet; 12-a flow deflector; 13-draining feet; 100-a guide electrode; 2-a shell; 3-a voltage dependent resistor; 4-a first electrode pin; 5-a second electrode pin; 61-a swinging member; 62-swing arm; 63-a resilient element; 7-a conductive spring plate; 200-a surge protection component; 300-base.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Examples

As shown in fig. 1, the present invention provides a current guiding electrode for current discharge of a surge protector; the electrode ring comprises an outer ring electrode ring 10 and a drainage sheet 11, wherein the outer ring electrode ring 10 is a circle, the drainage sheet 11 is positioned in a space enclosed by the outer ring electrode ring 10, a gap or an interval is reserved between the drainage sheet 11 and the outer ring electrode ring 10, the drainage sheet 11 is connected with the outer ring electrode ring 10 through a flow deflector 12, and a drainage pin 13 used for conducting drainage outwards is connected to the outer ring electrode ring 10.

When the voltage-sensitive resistor is used, the flow guide electrodes are arranged at two ends of the voltage-sensitive resistor, the outer ring forms a large-area ring, the inner part of the voltage-sensitive resistor is provided with the drainage sheet 11 with a smaller area, a gap A is formed between the outer ring electrode ring 10 and the drainage sheet 11, the middle gap A is beneficial to the self heat dissipation of the voltage-sensitive resistor, the voltage-sensitive resistor can be enabled to self dissipate heat to form a state which can be always in a uniform state under the conditions of large current discharge and power frequency voltage, and the phenomena of hole melting and breakdown caused; when the piezoresistor breaks down, the heat is transmitted out through self heat dissipation and the diversion electrode, so that the internal separation mechanism can be quickly separated, the tripping rate is improved, and the operation safety of a power grid is ensured.

In one embodiment, the current-guiding plate 11, the outer ring electrode ring 10, the current-guiding plate 12 and the current-guiding foot 13 are integrally formed. The guide electrode is made of copper, and the outer surface of the guide electrode is plated with silver; copper has high temperature resistant corrosion resistant characteristic, because copper thermal conductivity is good, can spread the heat fast, releases the heat by piezo-resistor self and electrode copper sheet simultaneously, can make the heat more can reach the temperature of breaking away from fast and the dropout in confined space, improves the dropout rate.

In this example, the current guiding sheet 11 is located at the center of the outer ring electrode ring 10 so as to be connected with the center of the piezoresistor, thereby discharging the high current at the center of the piezoresistor.

In one embodiment, the position of the drainage foot 13 on the outer ring electrode ring 10 is opposite to the position of the flow deflector 12 on the outer ring electrode ring 10, as shown in fig. 1 and 2; in another embodiment, the position of the drainage feet 13 on the outer ring electrode ring 10 is offset from the position of the baffle 12 on the outer ring electrode ring 10, as shown in fig. 3.

In one embodiment, the outer ring electrode ring 10 is a circular ring, a rectangular ring, or an elliptical ring; the drainage sheet 11 is rectangular, circular or elliptical. See fig. 1 and 2.

As shown in fig. 4 and fig. 5, the present invention further provides a surge protection assembly, which includes a housing 2, and a varistor 3, a tripping mechanism and a current-guiding electrode 100, which are disposed on the housing 2, wherein there are two current-guiding electrodes 100, and the varistor 3 is connected between the two current-guiding electrodes 100 to form a series structure; flow guide electrode 100 and the laminating of 3 terminal surfaces of piezo-resistor, it is fixed through welding or other modes, every flow guide electrode 100's drainage piece 11 is located the center of 3 terminal surfaces of piezo-resistor for the outer lane forms a large tracts of land ring, and the drainage piece 11 of inside less area, outer lane electrode ring 10 and the formation space between the drainage piece 11, the intermediate space does benefit to the heat dissipation of piezo-resistor 3, can make 3 self heat dissipation of piezo-resistor form one can be in an even state all the time with the power frequency voltage lower surface at heavy current discharge, avoid producing the unbalanced hole that melts of local difference in temperature, puncture phenomenon.

In this example, the surge protection assembly further includes a first electrode pin 4 and a second electrode pin 5 for external connection, where the first electrode pin 4 is connected to, for example, welded to, the first current conducting electrode 100; the second guide electrode 100 is connected with the second electrode pin 5 through a conductive elastic sheet 7, specifically, the second guide electrode 100 is welded with the conductive elastic sheet 7, in this example, the second guide electrode 100 is bent along a direction perpendicular to a plane where the second guide electrode is located and then welded with the conductive elastic sheet 7, the tripping mechanism acts on the conductive elastic sheet 7, and when the heat of the second guide electrode 100 reaches the disengagement temperature, the welding position of the second guide electrode 100 and the conductive elastic sheet 7 is detached; under the action of the tripping mechanism, the conductive elastic sheet 7 is separated from the second guide electrode 100, so that tripping is realized, and the safe operation of a power grid is protected.

The tripping mechanism can adopt any structure in the prior art; in this embodiment, the trip mechanism includes an elastic element 63 and a swing member 61 rotatably mounted on the housing 2, the swing member 61 has a swing arm 62, one end of the elastic element 63 is connected to the housing 2, the other end of the elastic element 63 is connected to the swing member 61, the elastic force of the elastic element 63 causes the swing arm 62 to abut against the conductive elastic sheet 7, specifically, the swing member 61 is mounted on the housing 2 through a rotating shaft, the elastic element 63 is a spring, the pulling force of the spring causes the swing arm 62 of the swing member 61 to abut against the conductive elastic sheet 7, and after the trip, the swing arm 62 pushes the conductive elastic sheet 7 and the second current guiding electrode 100 apart from each other.

As shown in fig. 6, the utility model also provides a surge protector, including surge protection component 200 and base 300, be provided with the slot that is used for holding surge protection component 200 and be used for the interface that is connected with surge protection component 200 electricity on the base 300, surge protection component 200 installs in the slot, and each surge protection component 200 corresponds and is provided with two interfaces, first electrode pin 4 and second electrode pin 5 insert in the corresponding interface; multiple mounting locations may be provided on each base 300 to facilitate mounting multiple surge protection assemblies 200 side-by-side. The plug structure of the surge protection component 200 and the base 300 belongs to the prior art and is not described in detail.

As described above, the utility model discloses, following beneficial effect has:

1. the heat power consumption of the diversion long-acting component can be reduced, and the protectiveness is improved. The self heat power consumption is reduced, the service life of the piezoresistor can be prolonged, and the service life of the product is prolonged.

2. The leakage current or power frequency follow current can enable the whole surface to be heated uniformly, so that the puncture and the hole melting which are caused by local heating unevenness can be avoided, and the service life is prolonged.

3. The flow capacity is high, the residual pressure is low, the response time is faster, and the protection safety is improved.

4. High safety and reliability, and high reliability of the power supply lightning protection.

5. After the piezoresistor fails, the tripping rate of the product is improved, and the failure risk is reduced.

6. The application of electrodes of varistors in different shapes is met, the maintenance is less, and the cost is reduced.

Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A flow-through electrode, comprising: the drainage piece is connected with the outer ring electrode ring through the flow deflector, and drainage feet for conducting drainage outwards are connected to the outer ring electrode ring.

2. Flow-through electrode according to claim 1, characterized in that: the drainage sheet, the outer ring electrode ring, the flow deflector and the drainage pin are integrally formed.

3. Flow-through electrode according to claim 1, characterized in that: the flow guide electrode is made of copper, and a silver coating is arranged on the outer surface of the flow guide electrode.

4. Flow-through electrode according to claim 1, characterized in that: the position of the drainage pin on the outer ring electrode ring is opposite to or staggered with the position of the flow deflector on the outer ring electrode ring.

5. Flow-through electrode according to claim 1, characterized in that: the drainage sheet is positioned in the center of the outer ring electrode ring.

6. Flow-through electrode according to claim 1, characterized in that: the outer ring electrode ring is a circular ring, a rectangular ring or an elliptical ring; the drainage sheet is rectangular, circular or elliptical.

7. The utility model provides a surge protection subassembly, includes the casing and establishes piezo-resistor and tripping device on the casing which characterized in that: the varistor further comprises two diversion electrodes according to any one of claims 1 to 6, wherein two diversion electrodes are connected to two ends of the varistor, and a drainage sheet of each diversion electrode is positioned in the center of the end face of the varistor.

8. The surge protection assembly of claim 7, wherein: the surge protection assembly further comprises a first electrode pin and a second electrode pin which extend out of the shell, the first electrode pin is connected with one of the guide electrodes, and the other guide electrode is connected with the second electrode pin through a conductive elastic sheet.

9. The surge protection assembly of claim 8, wherein: the conductive elastic sheet is welded with the guide electrode, the tripping mechanism comprises an elastic element and a swinging part which is rotatably arranged on the shell, the swinging part is provided with a swinging arm, one end of the elastic element is connected with the shell, the other end of the elastic element is connected with the swinging part, and the elastic force of the elastic element enables the swinging arm to be abutted against the conductive elastic sheet.

10. A surge protector characterized in that: the surge protection assembly of claim 8 or 9, further comprising a base, wherein the base is provided with a slot for accommodating the surge protection assembly and a socket for electrically connecting with the surge protection assembly, the surge protection assembly is installed in the slot, and the first electrode pin and the second electrode pin are inserted into the corresponding sockets.