CN107068312B

CN107068312B - Integrated box-packed FDMOV composite assembly with air discharge structure

Info

Publication number: CN107068312B
Application number: CN201710131361.3A
Authority: CN
Inventors: 陈泽同; 曾清隆
Original assignee: Longke Electronics Huiyang Co ltd
Current assignee: Longke Electronics Huiyang Co ltd
Priority date: 2017-03-07
Filing date: 2017-03-07
Publication date: 2020-02-21
Anticipated expiration: 2037-03-07
Also published as: CN107068312A

Abstract

The invention provides an integrated boxed FDMOV composite component with an air discharge structure, which comprises a box body, a screw and an FDMOV component, wherein the FDMOV component is arranged in the box body and is fixed together through the screw, and the FDMOV component consists of at least one component of an insulating fixing plate, an upper discharge electrode, an insulating ring sheet, a lower discharge electrode, an MOV chip and a lead-out electrode sheet.

Description

Integrated box-packed FDMOV composite assembly with air discharge structure

Technical Field

The invention relates to the technical field of piezoresistor design, in particular to an integrated boxed FDMOV composite component with an air discharge structure.

Background

The conventional MOV (Metal Oxide Varistors) have a special non-linear current-voltage characteristic, and once an abnormal condition occurs, such as a lightning strike, an electromagnetic field interference, a frequent action of a power switch, a power system failure, etc., so that a voltage on a line suddenly increases and exceeds a conducting voltage of a varistor, the line enters a conducting area, a current (I) and a voltage (V) have a non-linear relationship, generally called a non-linear coefficient (nonlinear Parameter), and the value of the non-linear coefficient can reach tens or hundreds, at this time, the impedance of a Surge Protector (SPD) becomes low and only has a few ohms, so that an overvoltage forms a surge current to flow out, thereby protecting a connected electronic product or an expensive component.

With the rapid development of clean energy technology, the popularization of high-speed rail and the wide application of electronic machinery (such as robots, manipulators and the like), the leakage current generated by the conventional MOV in the application also affects some application fields, such as railway track signals, which must be protected, and the leakage current generated in normal operation is not allowed, and the conventional MOV cannot meet the actual requirements due to the high environment, high reliability and the performance requirements of disposable products (such as 5G communication), and needs to be further improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an integrated boxed FDMOV composite component which has high assembly efficiency, long service life and an air discharge structure.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the invention provides an integrated boxed FDMOV composite component with an air discharge structure, which comprises a box body, a screw and an FDMOV component, wherein the FDMOV component is arranged in the box body and fixed together through the screw, and the FDMOV component comprises at least one component of an insulation fixing plate, an upper discharge electrode, an insulation ring sheet, a lower discharge electrode, an MOV chip and a lead-out electrode sheet.

Furthermore, the box body is provided with a screw hole, the insulating fixing plate and the lead-out electrode plate are provided with through holes, and the insulating fixing plate and the lead-out electrode plate are fixed together through a screw and the through holes and the screw hole.

Furthermore, the extraction electrode plate is provided with an extraction electrode plate extraction pin.

Furthermore, an upper discharge electrode lead-out pin is arranged on the upper discharge electrode.

Furthermore, the box body is rectangular, circular or polygonal and is made of insulating flame-retardant materials.

Furthermore, the upper discharge electrode and the lower discharge electrode are in a shape of a circle, a rectangle, a flat plate, a convex pile, a multi-convex point or a semicircle and made of copper, aluminum, graphite or an alloy thereof.

Further, a box body cover or a box body shell matched with the box body is arranged on the box body.

Furthermore, the bottom of the box body divides the inner space of the box body into a first space and a second space, and the heights of the first space and the second space are equal or different.

Furthermore, the leading-out direction of the leading-out electrode plate leading-out pin and the upper discharge electrode leading-out pin is radial or axial leading-out.

The invention has the beneficial effects that:

the invention provides an integrated boxed FDMOV composite component with an air discharge structure, which combines the split structure of the prior art into a whole structure, meets the requirements of miniaturization and functionalization, has the characteristics of no leakage current, long service life and high reliability because the integrated boxed FDMOV composite component does not bear working voltage during use, very slow crystal aging, no heat welding, no heat damage avoidance, fastening installation, simplicity, rapidness, suitability for mechanization, low cost and great economic use value.

Drawings

FIG. 1 is an exploded view of a single chip assembly structure of an integrated boxed FDMOV composite module having an air discharge structure in example 1;

FIG. 2 is an equivalent circuit diagram of an integrated boxed FDMOV composite assembly having an air discharge structure in example 1;

FIG. 2a is an exploded view of a two-chip assembly structure of an integrated boxed FDMOV composite module with an air discharge structure in example 2;

FIG. 2b is an equivalent circuit diagram of an integrated boxed FDMOV composite assembly with air discharge structure of example 2;

FIG. 2c is an exploded view of a single double-layer cassette dual-chip assembly of a cassette FDMOV composite assembly of the present invention;

FIG. 2d is an equivalent circuit diagram of a single double-layer cassette dual-chip assembly structure of a cassette FDMOV composite assembly of the present invention;

FIG. 3a is an exploded view of a single double-layer box body three-chip assembly structure of an integrated boxed FDMOV composite component with an air discharge structure in example 3;

fig. 3b is an equivalent circuit diagram of a three-chip assembly structure of the single double-layer box body of the integrated box-packed FDMOV composite component with an air discharge structure in embodiment 3.

FIG. 4a is the exploded view of the single-chip assembly structure of the single-body double-layer case body of the integrated case FDMOV composite component with air discharge structure in example 4;

fig. 4b is an equivalent circuit diagram of a single-chip assembly structure of a single double-layer box body of an integrated box-packed FDMOV composite component with an air discharge structure in embodiment 4.

FIG. 5a is the explosion diagram of the single double-layer box body and double-chip assembly structure of the integrated box FDMOV composite component with the air discharge structure in the embodiment 4;

fig. 5b is an equivalent circuit diagram of the single double-layer box body and double-chip assembly structure of the integrated boxed FDMOV composite component with the air discharge structure in embodiment 4.

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, the present embodiment provides a box-mounted FDMOV composite assembly including a box body 1, an insulating fixing plate 2, an upper discharge electrode 3, an insulating ring piece 4, a lower discharge electrode 5, an MOV chip 6, a lead-out electrode piece 7 and a screw 8.

Four corners at the bottom of the box body 1 are provided with 4 screw holes 9, the insulating fixing plate 2 is rectangular, and the four corners are provided with 4 through holes 10.

The upper discharge electrode 3 is circular and is provided with an upper discharge electrode lead-out pin 31.

The insulating ring 4 is annular and has a diameter greater than that of the MOV chip 6 by 1-5 mm.

The lower discharging electrode 5 is circular.

The MOV chip 6 is coated with the composite electrode.

The extraction electrode plate 7 is a metal rectangle, the four corners are provided with through holes 10, and the plane is provided with extraction electrode plate extraction pins 51.

Insulating

fixed plate

2, 3 pieces of upper discharge electrode, insulating ring piece 4, lower discharge electrode 5, MOV chip 6, lead out electrode piece 7 and arrange in proper order, put into

box body

1, 4 screws 8 pass 4 through-holes 10 of leading out electrode piece 7 respectively, pass 4 through-holes 10 on insulating fixed plate 2, fasten in the screw 9 in box body 1, the embedment silica gel of finishing the installation, epoxy, block upper cover 11.

The box body 1 in the embodiment is a rectangular single-layer box body 1.

In this embodiment, the upper and lower discharging electrodes 5 are made of copper.

In this embodiment, the insulating fixing plate 2 is made of an epoxy insulating plate.

In this embodiment, if the application is not severe, the lower discharge electrode 5 and the upper cover 11 may be omitted.

In this embodiment, the insulating fixing plate 2 may also be directly integrated on the box body.

In this embodiment, the combination order may be reversed or sorted according to actual needs.

Example 2

As shown in fig. 2a, the present embodiment is different from embodiment 1 in that: adopt double-deck box body 1 of monomer, increased insulating fixed plate 2, lead out electrode slice 7, MOV chip 6, lower discharge electrode 5 and insulating ring piece 4, constitute two series circuit.

According to insulating fixed plate 2, draw forth electrode slice 7, MOV chip 6, lower discharge electrode 5, insulating ring piece 4 goes up discharge electrode 3, insulating ring piece 4, lower discharge electrode 5, MOV chip 6, draw forth electrode slice 7, insulating fixed plate 2 superposes in proper order, puts into first space 101 in

box body

1, 4 screws pass insulating

fixed plate

2, 4 through-holes 10 on insulating fixed plate 2, fasten in the screw 9 in box body 110, the installation finishes the embedment silica gel, epoxy sheathes box body 1 shell 12.

In this embodiment, the box body 110 is rectangular, the bottom divides the box body 1 into a first space 101 and a second space 102, the two sides of the box body are not equal in height, and the second space 102 is about 1/3 of the whole box body 1 for installing a safety device. The bottom of the box body 1 is provided with a rectangular or round through hole 13, which is convenient for the axial extraction electrode to be connected with a safety device.

The lead-out electrode sheet 7 of this embodiment is metal circular.

In this embodiment, the

discharge electrodes

5 and 4 may be omitted if the application is not severe.

As shown in fig. 2c and 2d, a connecting wire 52 connecting the lower discharge electrode 5 is added, so that the structure becomes a conventional star circuit.

Example 3

As shown in fig. 3a and 3b, the present embodiment is composed of three groups of series structures assembled together, so as to conveniently form an angle application circuit.

The difference between this example and example 1 is that 3 groups composed as in example 1 were connected in series.

As shown in fig. 3a, one group is composed of an upper discharge electrode 3, an insulating ring piece 4, an MOV chip 6 and a lead electrode piece 7, another group is composed of an upper discharge electrode piece 3, an insulating ring piece 4, an MOV chip 6 and a lead electrode 5, a third group is composed of an upper discharge electrode piece 3, an insulating ring piece 4, an MOV chip 6 and a lead electrode piece 7, the three groups are arranged in sequence, insulating

fixing plates

2 and 1 are arranged at the uppermost and lowermost surfaces, the whole is put into a box body 1, and fastening is carried out according to the above embodiment. After the installation, silica gel and epoxy resin are filled and sealed, and the box body shell 12 is sleeved.

In the embodiment, the box body 1 is a rectangular single double-layer box body 1

In this embodiment, the typical corner-type protection circuit can be formed by connecting the head and tail lead-out pins with external circuits, and in this embodiment, if the insulating fixing plates 21 and 11 are replaced by metal plates and one of them has lead-out pins and the connection is performed by screws, the typical corner-type protection circuit can also be formed, in which case the upper discharge electrode 32 and the lead-out electrode plate 75 can be omitted.

Example 4

As shown in fig. 4a and 4b, the present embodiment is different from embodiment 1 in that the case is different, the single-body single-layer is changed into the single-body double-layer open type assembly, in addition to the case 1, there is also a case (similar to the case of embodiment 1) sleeved on the case 1, the lead-out pins 71 of the lead-out electrode sheet 7 are changed into axial lead-out, the upper discharge electrode 3 is rectangular, 4 through holes are provided at four corners, and the lead-out pins 31 are bent and led out.

As shown in fig. 4a, a lead-out electrode plate 3, an MOV chip 6, a lower discharge electrode 5, an insulating ring plate 4, an upper discharge electrode 3, and four screws are sequentially arranged in the hollow space of the case 1, and respectively penetrate through the four corner through holes of the upper discharge electrode 3 and are fastened in the corresponding screw holes in the case 1.

In this embodiment, the discharge electrode 5 may be omitted if the application is not severe.

The box body in this embodiment is a rectangular single double-layer box body.

Example 5

As shown in fig. 5a and 5b, the lead electrode plate 7, the MOV chip 6, the insulating ring plate 4, the upper discharge electrode 3, the insulating ring plate 4, the MOV chip 6 and the lead electrode plate 7 are sequentially stacked in the cavity of the case 1, and four screws are used for connecting the lead electrode plate 5 and are fastened in the four corner screw holes of the case 1, thereby forming a series-parallel structure mode.

In this embodiment, the lead-out electrode slice is changed to be rectangular, and four corners are provided with through holes or screw holes.

In this embodiment, the lead pins 31 of the upper discharge electrode 3 are bent and led out.

In this embodiment, the lower discharge electrode 5 has been omitted.

The box body in this embodiment is a rectangular single double-layer box body.

The invention provides a box-mounted FDMOV composite assembly, which combines a split structure in the prior art into a whole structure, meets the requirements of miniaturization and functionalization, has the characteristics of no leakage current, long service life and high reliability, is fastened and installed, is simple and quick, is suitable for mechanization, has low cost and has great economic use value.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention.

Claims

1. An integrated boxed FDMOV composite component with an air discharge structure is characterized in that: the FDMOV component is arranged in the box body and fixed together through the screw, and consists of an insulating fixing plate, an upper discharge electrode, an insulating ring sheet, a lower discharge electrode, an MOV chip and a lead-out electrode sheet or consists of an insulating fixing plate, an upper discharge electrode, an insulating ring sheet, an MOV chip and a lead-out electrode sheet;

the box body is rectangular, circular or polygonal, is a single-layer box body, a single double-layer box body or a single double-layer special-shaped box body and is made of an insulating flame-retardant material;

the bottom of the box body divides the internal space of the box body into a first space and a second space, and the first space and the second space are equal or different in height;

the upper discharge electrode and the lower discharge electrode are in a circular shape, a rectangular shape, a flat plate shape, a convex pile shape, a multi-convex point shape or a semicircular shape, and are made of copper, aluminum, graphite or alloys thereof;

the box body is provided with a box body cover or a box body shell which is matched with the box body for use.

2. An integrated boxed FDMOV composite assembly with air discharge structure as claimed in claim 1 wherein: the box body is provided with a screw hole, the insulating fixing plate and the leading-out electrode plate are provided with through holes, and the insulating fixing plate and the leading-out electrode plate are tightly fixed together with the screw hole through a screw and the through holes.

3. An integrated boxed FDMOV composite assembly with air discharge structure as claimed in claim 1 or 2 wherein: and the lead-out electrode piece is provided with a lead-out electrode piece lead-out pin.

4. An integrated boxed FDMOV composite assembly with air discharge structure as claimed in claim 1 or 2 wherein: and an upper discharge electrode lead-out pin is arranged on the upper discharge electrode.

5. An integrated boxed FDMOV composite assembly with air discharge structure as claimed in claim 3 wherein: the leading-out direction of the leading-out electrode plate leading-out pin is radial or axial leading-out.

6. An integrated boxed FDMOV composite assembly with air discharge structure according to claim 4 wherein: the leading-out direction of the upper discharge electrode leading-out pin is radial or axial leading-out.