CN212811284U

CN212811284U - Small PCB board-mounted SPD capable of meeting T1-level lightning current

Info

Publication number: CN212811284U
Application number: CN202021163700.XU
Authority: CN
Inventors: 杨震; 宋秋平
Original assignee: Anhui Golden Power Electronic Co ltd
Current assignee: Anhui Golden Power Electronic Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-03-26
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a can satisfy small-size PCB board of T1 level lightning current carries type SPD, including lightning protection device shell and inner core, the outer end fixedly connected with MOV piezo-resistor of inner core, the inside sliding connection of inner core has the dropout to instruct the slide, the dropout is instructed and is provided with dropout tension spring between the interior terminal surface of slide and inner core, MOV piezo-resistor's opposite side is provided with the dropout electrode, the inside fixedly connected with of inner core long-range warning short electrode and long-range warning long electrode. In the utility model, firstly, the MOV piezoresistor discharges the lightning current to the ground through the copper electrode of the product by the characteristics of high frequency and low frequency resistance, thereby achieving the function of lightning protection; secondly, the low-temperature alloy melts, the tripping indicating sliding plate moves instantly, the current is cut off, the electric arc is cut off, when the tripping indicating sliding plate moves instantly, the alarm signal is cut off, the small window on the shell of the lightning protection device is changed into red from original green through the movement of the tripping indicating sliding plate, and the local failure indicating function is realized.

Description

Small PCB board-mounted SPD capable of meeting T1-level lightning current

Technical Field

The utility model relates to a surge protector technical field especially relates to a can satisfy small-size PCB board of T1 level lightning current carries type SPD.

Background

Surge Protection Devices (SPDs) are devices used to limit transient overvoltages and conduct Surge currents. The surge protector not only has the lightning protection function, but also has the function of inhibiting switching overvoltage, so that the surge protector has a wide application field; the function of the lightning protection device is to limit the transient overvoltage entering a power line and a signal transmission line within the voltage range which can be borne by equipment or a system, or to discharge strong lightning current to the ground, so as to protect the protected equipment or the system from being impacted.

Along with the development trend of integration and miniaturization of user system equipment, more and more PCB on-board SPDs are selected to be installed outdoors, and when the weather of thunderstorm meets, strong lightning current flows into the ground, so that the equipment or the system is easily impacted, and the equipment is damaged, therefore, the miniaturized SPDs installed outdoors have certain requirements on the anti-impact voltage of the lightning arrester, but the existing PCB on-board SPDs are difficult to meet the application requirement of T1-level lightning current impact.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem that the existing PCB on-board SPD lightning arrester is difficult to meet the application requirement of T1-level lightning current impact, the small PCB on-board SPD which can meet T1-level lightning current is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a can satisfy small-size PCB board of T1 level lightning current carries type SPD, includes the lightning protection device shell and installs the inside inner core at the lightning protection device shell, the outer end fixedly connected with MOV piezo-resistor of inner core, the alloy welding has the product copper electrode in one side of MOV piezo-resistor, the inside sliding connection of inner core has the dropout to instruct the slide, the dropout is instructed to be provided with dropout tension spring between the interior terminal surface of slide and inner core, and the one end of dropout tension spring links to each other with dropout instruction slide, the other end and inner core fixed connection, the inside of MOV piezo-resistor has the dropout point, the opposite side of MOV piezo-resistor is provided with the dropout electrode, and the one end of dropout electrode links to each other with the dropout point, the inside of inner core is located the downside fixedly connected with that the dropout instructed the slide that the downside fixedly.

As a further description of the above technical solution:

two groups of guide rail grooves matched with the tripping indication sliding plate are arranged in the inner core.

As a further description of the above technical solution:

and the tripping electrode and the MOV piezoresistor are subjected to reflow soldering through low-temperature alloy.

As a further description of the above technical solution:

the remote alarm short electrode and the remote alarm long electrode are both made of high-elasticity metal materials.

As a further description of the above technical solution:

and the remote alarm short electrode and the remote alarm long electrode are both contacted with the tail end of the tripping indication sliding plate.

As a further description of the above technical solution:

and an isolation barrier which is vertically distributed is arranged between the two groups of guide rail grooves in the inner core.

As a further description of the above technical solution:

and a small window is arranged at the outer end of the lightning protection device shell.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, when the thunderbolt phenomenon in the operation of system in-process, the lightning current passes through trip electrode 8 and introduces the lightning current in the core device MOV piezo-resistor, passes through the high frequency through the core device MOV piezo-resistor, and the characteristic of hindering the low frequency is released the lightning current to the ground through product copper electrode to reach lightning protection's function.

2. In the utility model, when the voltage failure, the core device MOV piezoresistor can generate temperature change due to the change of voltage, current and the like, when the temperature reaches the low-temperature alloy melting point of one end of a tripping electrode welded on the tripping point of the core device MOV piezoresistor through the low-temperature alloy, the tripping indicating slide plate moves instantaneously under the influence of the pulling force of a tripping tension spring, so that the core device can rapidly cut off the current and cut off the electric arc, then the large electric arc generated instantaneously by electrode tripping of the tripping indicating slide plate passes through an isolation grid of an inner core, the electric arc is extinguished, when the tripping indicating slide plate moves instantaneously, a long electrode for remote alarm and a short electrode for remote alarm pressed at the tail end of the tripping indicating slide plate pass through the characteristic of self high elasticity, the tripping indicating slide plate cuts off the alarm signal, so that the function of remote alarm is realized, after the tripping indicating slide plate moves instantaneously, a, thereby realizing the local failure indication function.

Drawings

Fig. 1 shows an axial view provided in accordance with an embodiment of the present invention;

fig. 2 illustrates an overall assembly view provided in accordance with an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of an MOV of a core device provided according to an embodiment of the present invention;

fig. 4 shows a schematic structural diagram of a trip electrode provided according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating an opening structure of a PCB board according to an embodiment of the present invention;

fig. 6 shows a schematic diagram of an inner core structure provided according to an embodiment of the present invention.

Illustration of the drawings:

1. a lightning protection device housing; 101. a small window; 2. an inner core; 3. tripping the tension spring; 301. a trip point; 4. a remote alarm short electrode; 5. a long electrode for remote alarm; 6. a product copper electrode; 7. an MOV varistor; 701. an isolation gate; 8. a trip electrode; 9. and a trip indicating slide plate.

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. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a small-sized PCB board-mounted SPD capable of meeting T1 level lightning current comprises a lightning protector shell 1 and an inner core 2 arranged in the lightning protector shell 1, wherein the outer end of the inner core 2 is fixedly connected with an MOV piezoresistor 7, one side of the MOV piezoresistor 7 is welded with a product copper electrode 6 through alloy, the inner part of the inner core 2 is slidably connected with a tripping indication sliding plate 9, a tripping tension spring 3 is arranged between the tripping indication sliding plate 9 and the inner end face of the inner core 2, one end of the tripping tension spring 3 is connected with the tripping indication sliding plate 9, the other end of the tripping tension spring is fixedly connected with the inner core 2, a tripping point 301 is arranged in the MOV piezoresistor 7, a tripping electrode 8 is arranged on the other side of the MOV piezoresistor 7, one end of the tripping electrode 8 is connected with the tripping point 301, a remote short electrode 4 and a remote warning long electrode 5 are fixedly connected with the lower side of the, the tripping tension spring 3 is arranged to provide a tension for balancing movement.

Specifically, as shown in fig. 2 and 6, two sets of guide rail grooves are disposed inside the inner core 2 and used in cooperation with the trip indicating sliding plate 9, and the guide rail grooves are disposed to facilitate sliding of the trip indicating sliding plate 9.

Specifically, as shown in fig. 2, the trip electrode 8 and the MOV varistor 7 are reflow-welded by low-temperature alloy, and the low-temperature alloy between the trip electrode 8 and the MOV varistor 7 can be melted due to the temperature change caused by the strong current, so that the trip indicating slide plate 9 is instantaneously moved under the influence of the pulling force of the trip tension spring 3, and can rapidly cut off the current and cut off the arc.

Specifically, as shown in fig. 2 and 4, the remote alarm short electrode 4 and the remote alarm long electrode 5 are both made of a high-elasticity metal material, the remote alarm short electrode 4 and the remote alarm long electrode 5 are both in contact with the end of the trip indicating slide plate 9, and when the trip indicating slide plate 9 moves instantaneously, the remote alarm long electrode 5 and the remote alarm short electrode 4 pressed by the end thereof cut off the alarm signal to realize the remote alarm function through the high-elasticity characteristic of the remote alarm long electrode 5 and the remote alarm short electrode 4.

Specifically, as shown in fig. 2 and 6, the isolation bars 701 are vertically arranged between two sets of guide rail grooves in the inner core 2, and when an electrode is tripped, a large arc generated can extinguish the arc through the isolation bars 701 in the inner core 2.

Specifically, as shown in fig. 1 and 2, a small window 101 is installed at the outer end of the lightning protection device shell 1, after the trip indicating sliding plate 9 moves instantly, the small window 101 on the lightning protection device shell 1 changes from original green to red, and a user can replace a new SPD lightning protection device when receiving an alarm signal.

The working principle is as follows: during the use, at first, when there is the thunderbolt phenomenon in the system operation process, the lightning current leads into core device MOV piezo-resistor 7 through tripping electrode 8 in, leads to the high frequency through core device MOV piezo-resistor 7, and the characteristic of hindering the low frequency discharges the lightning current to ground through product copper electrode 6 to reach lightning protection's function: secondly, when the core device MOV piezoresistor 7 generates temperature change due to the change of voltage and current, when the temperature reaches the temperature that one end of the tripping electrode 8 is welded on the tripping point of the core device MOV piezoresistor 7 through low-temperature alloy to be at the 301 low-temperature alloy melting point, the tripping indicating slide plate 9 is instantaneously moved under the influence of the pulling force of the tripping tension spring 3, so that the current can be rapidly cut off and the electric arc can be cut off, then the electric arc is extinguished when the large electric arc generated at the moment of electrode tripping passes through the isolation grating 701 of the inner core 2, when the tripping indicating slide plate 9 is instantaneously moved, the remote alarm long electrode 5 and the remote alarm short electrode 4 pressed at the tail end cut off the alarm signal through the characteristic of high elasticity of the self, so that the remote alarm function is realized, after the tripping indicating slide plate 9 is instantaneously moved, the small window 101 on the lightning protector shell 1 is changed into red from the original green through the, thereby realizing the local failure indication function.

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 small PCB board-mounted SPD capable of meeting T1-level lightning current comprises a lightning protection device shell (1) and an inner core (2) installed inside the lightning protection device shell (1), and is characterized in that the outer end of the inner core (2) is fixedly connected with an MOV piezoresistor (7), one side of the MOV piezoresistor (7) is welded with a product copper electrode (6) through alloy, the inside of the inner core (2) is slidably connected with a tripping indication sliding plate (9), a tripping tension spring (3) is arranged between the tripping indication sliding plate (9) and the inner end face of the inner core (2), one end of the tripping tension spring (3) is connected with the tripping indication sliding plate (9), the other end of the tripping tension spring is fixedly connected with the inner core (2), a tripping point (301) is arranged inside the MOV piezoresistor (7), and a tripping electrode (8) is arranged on the other side of the MOV piezoresistor (7), and one end of the tripping electrode (8) is connected with a tripping point (301), and the inner part of the inner core (2) is fixedly connected with a remote warning short electrode (4) and a remote warning long electrode (5) at the lower side of the tripping indication sliding plate (9).

2. A small PCB board-mounted SPD capable of meeting the lightning current of T1 level according to claim 1, characterized in that the inner core (2) is internally provided with two sets of guide rail grooves matched with a trip indicating sliding plate (9) for use.

3. A small PCB board-mounted SPD to meet class T1 lightning current according to claim 1, wherein the trip electrode (8) and the MOV varistor (7) are reflow soldered by low temperature alloy.

4. A small PCB board-mounted SPD capable of satisfying grade T1 lightning current according to claim 1, characterized in that, the remote alarm short electrode (4) and the remote alarm long electrode (5) are made of high elastic metal material.

5. A small PCB on-board SPD capable of meeting lightning current grade T1 according to claim 4, wherein the remote alarm short electrode (4) and the remote alarm long electrode (5) are both in contact with the end of a trip indicating slide (9).

6. A small PCB board-mounted SPD capable of meeting lightning current of T1 grade according to claim 1, wherein the inner part of the inner core (2) is provided with vertically distributed isolation grids (701) between two sets of guide rail grooves.

7. A compact PCB on-board SPD capable of meeting lightning current rating T1 according to claim 1, wherein the outer end of the lightning protector housing (1) is fitted with a small window (101).