CN211480928U

CN211480928U - Surge protector

Info

Publication number: CN211480928U
Application number: CN202020400918.6U
Authority: CN
Inventors: 束静; 黄建芳; 倪彬
Original assignee: Changzhou Chuangjie Lightning Protection Co ltd
Current assignee: Changzhou Chuangjie Lightning Protection Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-09-11
Anticipated expiration: 2030-03-26

Abstract

The utility model discloses a surge protector, including the shell, the shell has the inner chamber, has piezoresistor and polytetrafluoroethylene membrane in the inner chamber, still has with shell matched with outer splint, outer splint are fixed to be set up on the shell, and outer splint cover the inner chamber, and outer splint press piezoresistor and polytetrafluoroethylene membrane to be fixed in the inner chamber, and the polytetrafluoroethylene membrane is located between inner chamber bottom and the piezoresistor. The utility model has the advantages of simple and reasonable structure, can improve the security.

Description

Surge protector

Technical Field

The utility model relates to an interpolation core of module among surge protector belongs to overvoltage, lightning protection technical field.

Background

In the present society, various natural disasters frequently occur, and lightning is one of the natural disasters. Thunder is a special weather phenomenon caused by discharge of charged cloud in the air, can generate lightning impulse currents of dozens of thousands of amperes or even one or two hundred kiloamperes, can generate huge electromagnetic effect, thermal effect and mechanical effect, is an important reason for damaging electrical equipment and electronic equipment, and threatens safe and stable operation of electrical equipment and electronic information systems in various fields of household electrical appliance products, communication, electric power, railways, airports, petrifaction, industrial control, military, and the like. Surge Protection Devices (SPDs) are installed on lines such as power lines, signal lines, and control lines connected to electrical and electronic devices, and have been proven to be one of the measures that are very effective for lightning protection.

The surge protection devices accounting for 90% of the market are voltage-limiting surge protection devices, core components of the surge protection devices are piezoresistors, and the structural form of the surge protection devices is that thermal release devices are arranged on the piezoresistors in a plastic shell of a surge protection device module; the failure modes of the piezoresistor are short circuits, although the surge protector is protected before failure due to thermal tripping, most products of the thermal tripping device of the surge protector on the market can only protect small current (namely in ampere level), if the fault current reaches dozens of amperes or more, the surge protector is on fire due to the fact that the thermal tripping device is not timely disconnected, and a large secondary disaster is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a surge protection device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a surge protector, includes the shell, and the shell has the inner chamber, has piezo-resistor and polytetrafluoroethylene membrane in the inner chamber, still has the outer splint with shell matched with, and outer splint are fixed to be set up on the shell, and outer splint cover the inner chamber, and outer splint press piezo-resistor and polytetrafluoroethylene membrane to be fixed in the inner chamber, and the polytetrafluoroethylene membrane is located between inner chamber bottom and the piezo-resistor.

The piezoresistor comprises a piezoresistor body, an upper conductive pin and a lower conductive pin, wherein the upper conductive pin and the lower conductive pin are respectively fixed on two side surfaces of the piezoresistor body in a soldering mode.

The side of the upper conductive pin is provided with an upper outlet small piece, the upper outlet small piece extends to the side of the piezoresistor body, the inner cavity is provided with an insertion groove matched with the upper outlet small piece, the lower conductive pin is provided with a lower outlet small piece, the bottom of the inner cavity is provided with a through groove for the lower outlet small piece to penetrate through, and the lower outlet small piece penetrates through the bottom of the inner cavity and is exposed out of the shell to form a thermal trip point.

The side that the shell is located the inner chamber is equipped with two hollow plastic columns at least, and the plate body of outer splint is opened has the mating holes with hollow plastic column matched with, passes the mating holes through self tapping screw and cooperatees with hollow plastic column, and the outer splint is fixed to be set up on the shell and is pressed piezoresistor and polytetrafluoroethylene membrane to be fixed in the inner chamber, and adopts the insulating cement embedment in the inner chamber.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a fault arc blowout that probably produces after outer splint and polytetrafluoroethylene membrane seal the piezoresistor short circuit from top to bottom strives for more action time for the thermal trip to prevent that the electrical apparatus potential safety hazard that probably takes place from stretching, and further, because the lower electrically conductive foot of piezoresistor exposes the shell, consequently the thermal trip point is located the shell outside, and the thermal trip effect is better.

Drawings

FIG. 1 is a schematic view of the structure relationship of the present invention;

fig. 2 is a schematic structural diagram of the varistor 2 of the present invention.

In the figure: the self-tapping chip comprises a shell 1, an inner cavity 1-1, an insertion groove 1-1-1, a hollow plastic column 1-1-2, a through groove 1-1-3, a piezoresistor 2, a piezoresistor body 2-1, an upper conductive pin 2-2, an upper lead-out small piece 2-2-1, a lower conductive pin 2-3, a polytetrafluoroethylene film 3, an outer clamping plate 4, a matching hole 4-1 and a self-tapping screw 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a surge protector comprises a housing 1, the housing 1 has an inner cavity 1-1, the inner cavity 1-1 has a piezoresistor 2 and a teflon membrane 3, and further has an outer clamping plate 4 matched with the housing 1, the outer clamping plate 4 is fixedly arranged on the housing 1, the inner cavity 1-1 is covered by the outer clamping plate 4, the piezoresistor 2 and the teflon membrane 3 are fixed in the inner cavity 1-1 by the outer clamping plate 4 in a pressing manner, and the teflon membrane 3 is located between the bottom of the inner cavity 1-1 and the piezoresistor 2. In manufacturing use, the polytetrafluoroethylene membrane 3 preferably has a thickness greater than 0.2 mm.

The piezoresistor 2 comprises a piezoresistor body 2-1, an upper conductive pin 2-2 and a lower conductive pin 2-3, wherein the upper conductive pin 2-2 and the lower conductive pin 2-3 are respectively fixed on two side surfaces of the piezoresistor body 2-1 by soldering. When the piezoresistor 2 is manufactured and used, the piezoresistor can be a single piece, or a plurality of pieces connected in parallel.

The side edge of the upper conducting pin 2-2 is provided with an upper lead-out small piece 2-2-1, the upper lead-out small piece 2-2-1 extends to the side edge of the piezoresistor body 2-1, the inner cavity 1-1 is provided with an insertion groove 1-1-1 matched with the upper lead-out small piece 2-2-1, the lower conducting pin 2-3 is provided with a lower lead-out small piece 2-3-1, the bottom of the inner cavity 1-1 is provided with a through groove 1-1-3 for the lower lead-out small piece 2-3-1 to pass through, and the lower lead-out small piece 2-3-1 passes through the bottom of the inner cavity 1-1 and is exposed out of the shell 1.

The side edge of the shell 1, which is positioned in the inner cavity 1-1, is at least provided with two hollow plastic columns 1-1-2, the plate body of the outer clamping plate 4 is provided with a matching hole 4-1 matched with the hollow plastic column 1-1-2, the matching hole 4-1 is penetrated through by a self-tapping screw 5 to be matched with the hollow plastic column 1-1-2, the outer clamping plate 4 is fixedly arranged on the shell 1, the piezoresistor 2 and the polytetrafluoroethylene membrane 3 are pressed and fixed in the inner cavity 1-1, and the inner cavity 1-1 is encapsulated by insulating glue. When the outer clamping plate 4 is manufactured and used, the outer clamping plate can be made of copper, aluminum, iron or other conductive alloys, or ceramic, flame-retardant and high-temperature-resistant plates, and meanwhile, the thickness of the outer clamping plate can be 0.5-3 mm, so that the outer clamping plate has better mechanical strength and toughness.

It should be noted that the utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece can all be customized according to the record of description and attached drawing, and the concrete connected mode of each part all adopts conventional means such as mature bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt among the prior art, conventional model, and the inventor does not detailed herein again.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A surge protector device, characterized in that: the pressure-sensitive resistor and polytetrafluoroethylene film integrated circuit comprises a shell (1), wherein the shell (1) is provided with an inner cavity (1-1), a pressure-sensitive resistor (2) and a polytetrafluoroethylene film (3) are arranged in the inner cavity (1-1), an outer clamping plate (4) matched with the shell (1) is further arranged, the outer clamping plate (4) is fixedly arranged on the shell (1), the outer clamping plate (4) covers the inner cavity (1-1), the pressure-sensitive resistor (2) and the polytetrafluoroethylene film (3) are pressed and fixed in the inner cavity (1-1) through the outer clamping plate (4), and the polytetrafluoroethylene film (3) is located between the bottom of the inner cavity (1-1) and the pressure-sensitive resistor (2).

2. A surge protector according to claim 1, wherein the varistor (2) comprises a varistor body (2-1) and upper (2-2) and lower (2-3) conductive legs, and the upper (2-2) and lower (2-3) conductive legs are soldered to the respective sides of the varistor body (2-1).

3. A surge protector according to claim 1 or 2, wherein the side of the upper conductive pin (2-2) has an upper lead-out tab (2-2-1), the upper lead-out tab (2-2-1) extends to the side of the varistor body (2-1), the inner cavity (1-1) has an insertion slot (1-1-1) for mating with the upper lead-out tab (2-2-1), the lower conductive pin (2-3) has a lower lead-out tab (2-3-1), the bottom of the inner cavity (1-1) has a through slot (1-1-3) for the lower lead-out tab (2-3-1) to pass through, the lower lead-out tab (2-3-1) passes through the bottom of the inner cavity (1-1) and is exposed out of the housing (1), constituting a thermal trip point.

4. A surge protector according to claim 1, characterized in that the housing (1) is provided with at least two hollow plastic columns (1-1-2) on the sides of the inner cavity (1-1), the body of the outer clamping plate (4) is provided with matching holes (4-1) matching with the hollow plastic columns (1-1-2), the outer clamping plate (4) is fixedly arranged on the housing (1) and presses and fixes the piezoresistor (2) and the polytetrafluoroethylene membrane (3) in the inner cavity (1-1) through the matching holes (4-1) by self-tapping screws (5), and the inner cavity (1-1) is encapsulated by insulating glue.