WO2017121074A1

WO2017121074A1 - Surge protector using box-type fastening assembly structure

Info

Publication number: WO2017121074A1
Application number: PCT/CN2016/086952
Authority: WO
Inventors: 陈泽同; 曾清隆
Original assignee: 隆科电子(惠阳)有限公司
Priority date: 2016-01-15
Filing date: 2016-06-23
Publication date: 2017-07-20

Abstract

A surge protector using a box-type fastening assembly structure, comprising an insulating box body (1), at least one tripping electrode plate (2) and at least one MOV chip (3) that are alternatively arranged, and an upper electrode clamping plate (5), the tripping electrode plate, the MOV chip and the upper electrode clamping plate being fixed in the insulating box body by means of fasteners (6), the tripping electrode plate being crimped to the bottom of the insulating box body. An insulating rubber sleeve (4) is sleeved outside the MOV chip, or an insulating rubber layer (70) is filled and encapsulated in the box-type fastening assembly structure. Welding and cleaning are not required for the surge protector using the box-type fastening assembly structure, and the surge protector is labor- and time-saving, and environment-friendly, has a good heat dissipation performance, prevents tripping, and has a high assembly efficiency.

Description

Surge protector using box fastening assembly structure

Technical field

The present invention relates to the field of assembly technology of a surge protector, and more particularly to a surge protector using a box-type fastening assembly structure.

Background technique

The conventional Surge Protective Device (SPD) has special nonlinear current-voltage characteristics. It is mainly composed of a passive electronic component MOV (Metal Oxide Varistors) chip assembly. In the event of an abnormal situation, such as lightning strikes, electromagnetic field interference, frequent power switch operation, power system failure, etc., the voltage on the line suddenly increases, exceeding the on-voltage of the surge protector (SPD), and will enter the conduction area. The current (I) and the voltage (V) have a nonlinear relationship, which is generally called a nonlinearity parameter, and the value can be tens or hundreds. At this point, the surge protector (SPD) impedance will be low, only a few ohms, causing the overvoltage to form a surge current to protect the connected electronics or expensive components.

With the rapid development of clean energy technologies, the popularity of high-speed rail and the wide application of electronic machinery (such as robots, robots, etc.), the application requirements of surge protectors (SPD) are also increasing. In the assembly structure of a conventional surge protector (SPD) device, the MOV chip needs to be processed by four-sided welding, electrode extraction, encapsulation, boxing, potting, etc. in four or five processes, and the production time and energy consumption are not environmentally friendly. The assembled components have no positioning and orientation, are easy to be misplaced, have high assembly requirements, and the heat dissipation performance needs to be improved, thereby causing a decrease in reliability.

Summary of the invention

In view of the deficiencies of the above prior art, the technical problem to be solved by the present invention is to provide a mining machine that requires no welding, cleaning, labor saving, time saving, environmental protection, good heat dissipation performance, reliable tripping, and high assembly efficiency. The surge protector of the assembled structure is fastened by a box.

In order to solve the above technical problem, the technical solution adopted by the present invention is:

The present invention provides a surge protector using a box-type fastening assembly structure, comprising an insulating case, at least one tripping electrode piece alternately disposed with at least one MOV chip, an upper electrode plate, and at least one trip electrode piece At least one MOV chip and an upper electrode plate are fixed in the insulating case by fasteners, and a bottom of the insulating case is attached to the tripping electrode piece.

Further, a bottom of the inner cavity of the insulating case is provided with a fixing stud for fixing the at least one tripping electrode piece, the at least one MOV chip and the upper electrode clamping plate in cooperation with the fastener.

Further, an insulating rubber sleeve is placed on the MOV chip jacket. The insulating rubber sleeve is inserted into the periphery of the MOV chip through the middle hole, and the hole in the middle of the insulating rubber sleeve is equal to or slightly smaller than the diameter of the MOV chip, so that the rubber sleeve is tightly clamped to the chip to obtain the edge protection effect.

Further, the at least one tripping electrode sheet, the at least one MOV chip, and the upper electrode clamping plate are fixed in the insulating box body to form a box-type fastening assembly structure, and vacuum potting and insulating is performed in the box-type fastening assembly structure. Adhesive layer.

Further, each of the tripping electrode piece and the upper electrode plate has at least one lead-out leg, and the lead-out leg is axially led out or radially drawn.

Further, a through hole for axially or radially withdrawing the take-up leg of the tripping electrode piece is provided on a side wall or a bottom portion of the insulating case, and the lead leg of the upper electrode plate is axially led out The side wall of the insulating case body is also provided with a corresponding through hole for the lead leg of the upper electrode plate.

Further, the upper electrode plate is provided with a through hole or a threaded hole through which the fastener passes, and the position of the fixing stud corresponds to the position of the through hole or the threaded hole on the upper electrode plate. The fixing stud is provided with a cavity or an internally threaded cavity into which the fastener is fitted.

Further, the fastener is a metal or non-metal rivet or screw, and the length of the fastener is not greater than the thickness of the upper electrode plate to the bottom of the insulating case.

Further, the tripping electrode sheet is an aluminum electrode sheet, a copper electrode sheet, an iron electrode sheet or an aluminum alloy electrode sheet, a copper alloy electrode sheet, and a ferroalloy electrode sheet; and the upper electrode plate is an aluminum splint, a copper splint, an iron splint Or aluminum alloy splint, copper alloy splint, iron alloy splint.

Further, the surge protector adopting the box type fastening assembly is sleeved on the outer casing or the outer cover to realize modularization, and further, the base is coupled to realize modularization, and further, the module base is integrated.

The beneficial effects of the surge protector of the present invention using a box-type fastening assembly structure are as follows:

(1) The through hole of the lead-out electrode for the tripping electrode and the upper electrode clamping plate is disposed on the side wall or the bottom of the insulating box body, so that the assembly is positioned and oriented to avoid misassembly and reduce assembly requirements;

(2) The surge protector adopting the box type fastening assembly structure of the invention does not need welding and cleaning, saves labor, saves time and is environmentally friendly;

(3) The tripping electrode piece and the upper electrode piece constitute a double-sided heat dissipating structure, which greatly improves the utilization rate of the MOV chip; the double-sided heat dissipating structure also improves the power frequency withstand capability of the MOV chip, and increases the surge protector (SPD) The safety of the trip improves the reliability of the trip;

(4) The installation is simple and quick, the efficiency is improved, and the mechanized automatic assembly can be realized.

DRAWINGS

Figure 1a is an exploded view of a first embodiment of a surge protector employing a cartridge fastening assembly structure of the present invention;

Figure 1b is a schematic cross-sectional view (bending lead-out electrode) of a first embodiment of a surge protector using a box-type fastening assembly structure of the present invention;

Figure 2a is an exploded view of a second embodiment of a surge protector employing a cartridge fastening assembly of the present invention;

Figure 2b is a schematic cross-sectional view of the assembled potting of the second embodiment of the surge protector of the present invention using a box-type fastening assembly structure (bending lead-out electrode);

Figure 2c is an assembled view of the second embodiment of the surge protector of the present invention using a box-type fastening assembly;

3a and 3b are respectively a front and rear schematic view showing two structures of the trip electrode sheet;

Figure 3c is a schematic cross-sectional view of the assembly with axial extraction electrodes;

Figure 4a is an exploded view of a third embodiment of a surge protector employing a cartridge fastening assembly structure of the present invention;

Figure 4b is an assembled, post-example view of a third embodiment of a surge protector employing a cartridge fastening assembly of the present invention.

detailed description

The embodiments of the present invention are exemplified in the following with reference to the accompanying drawings, which are for the purpose of illustration and description.

Example 1

As shown in FIG. 1a and FIG. 1b, an embodiment of the present invention provides a surge protector using a box-type fastening assembly structure, including an insulation box body 1, which is insulated at about two-thirds of the total height of the insulation box body 1. The bottom of the box body is divided into two parts, the MOV chip 3 is mounted on the deep side of the box, the tripping device is mounted on the shallow side of the box, and the extension of the tripping electrode sheet 2 is provided at the bottom of the shared insulating box body 1. The hole, the four corners of the insulating box body on which the chip is mounted are provided with four hollow fixing studs 1-2, and the tripping electrode 2-1 of the tripping electrode sheet 2 is extended from the through hole 1-4 at the bottom of the insulating box body 1 The flat surface of the buckle electrode is attached to the bottom protruding point 1-3 of the insulating case, the other side is attached to one surface of the MOV chip 3, and the upper electrode clamping plate 5 is pressed against the other side of the MOV chip 3 on one side, and the other side passes the fastener 6 The upper electrode plate 5 is fixed to the fixing stud 1-2 of the insulating case 1, and at least one trip electrode piece 2, one MOV chip 3 and one upper electrode plate 5 are fastened in the insulating case.

In this embodiment, the surge protector adopting the box type fastening assembly structure is provided with a trip electrode sheet 2 and an MOV chip 3, and a plurality of trip electrode sheets 2 or more may be disposed according to the structure setting requirements. MOV chip 3, so that the equivalent circuit of the surge protector is a single-chip two-electrode structure, two parallel two-electrode structures, two three-electrode common-mode structures, three three-electrode angular structures, four double-parallel three-electrodes Knot Structure, three five-electrode structure, four five-electrode double tripping structure, and the like. The MOV chip 2 is also referred to as a valve plate.

In the present embodiment, an insulating rubber sleeve 4 is disposed on the outer surface of the MOV chip 3, and the insulating rubber sleeve 4 is provided with a hole 4-1 for receiving the MOV chip 3.

The tripping electrode sheet 2 and the upper electrode clamping plate 5 each have at least one lead-out leg, and the lead-out leg is axially led out or radially drawn. In the embodiment, the tripping electrode piece 2 and the upper electrode clamping plate 5 are respectively led out with one lead-out leg 2-1, 5-2, and the lead-out leg 2-1 of the tripping electrode piece 2 is bent and then sag The diameter is drawn upward, and the lead pin 5-1 of the upper electrode plate 5 is also vertically and radially drawn after being bent. 3a and 3b are schematic views showing the front and back surfaces (A and B faces) of the two structures of the trip electrode sheet 2, respectively. The lead of the tripping electrode sheet 2 may be a raised platform as shown in Fig. 3b, or may be a plane perpendicular to the tripping tab, as shown in Fig. 3a. Figure 3c is a schematic cross-sectional view of the assembly of the axially extracted electrode legs;

In this embodiment, a through hole 1-4 for the lead-out leg of the trip electrode tab 2 is provided at the bottom of the insulating case 1 , and a sidewall of the insulating case 1 is provided for the upper side. The through holes 1-5 of the lead pins 5-2 of the electrode plate 5 are led out. When the lead leg 2-1 of the trip electrode sheet 2 is axially led out, a through hole for guiding the lead leg of the trip electrode tab in the axial direction is provided on the side wall of the insulating case.

The upper electrode plate 5 is provided with a through hole or a threaded hole 5-1 through which the fastener 6 passes, and the insulating case 1 is provided with a through hole provided in the upper electrode plate 5 or The threaded holes 5-1 are positioned corresponding to the fixed studs 1-2. In this embodiment, four through holes 5-1 are disposed at four corners of the upper electrode plate 5, and four fixing studs 1-2 are disposed at four corners of the insulating box body 1 to facilitate screwing and uppering. Rivets or hot crimping.

The fastener 6 is a metal or non-metal rivet or screw, and the length of the fastener 6 is not greater than the height of the upper surface of the upper electrode plate 5 to the bottom of the insulating case 1.

The trip electrode sheet 2 is an aluminum electrode sheet, a copper electrode sheet, an iron electrode sheet or an aluminum alloy electrode sheet, a copper alloy electrode sheet, and an iron alloy electrode sheet; the upper electrode plate 5 is an aluminum splint, a copper splint, an iron splint or Aluminum alloy splint, copper alloy splint, iron alloy splint.

In this embodiment, the surge protector adopting the box type fastening assembly is sleeved on the outer casing or the outer cover to realize modularization, or is equipped with a base to realize modularization, or adopts module base integration.

Specifically, after the assembly of the box fastening assembly is completed, another part of the box is turned over by a conventional process: welding the tripping foot, inserting or pulling the foot or the lead, installing the trip device, and putting the outer cover The box or cover is attached to the base to form a complete surge protector module.

Example 2

The difference between this embodiment and Embodiment 1 is that:

As shown in FIGS. 2a, 2b, and 2c, the trip electrode sheet 2, the MOV chip 3, and the upper electrode plate 5 are fixed in the insulating case 1 to form a box-type fastening assembly, and the box-type fastening is performed. The top of the assembled structure is potted with an insulating layer 70, see Figure 2b. At the bottom of the insulating box, there are four protruding points 1-3 with uniform uniform height, the height of which is set to ensure the flow of the potting glue.

The insulating adhesive layer 70 is formed by encapsulating epoxy resin, phenolic resin, silica gel material or the like.

The assembly process of the surge protector using the box type fastening assembly structure of the above embodiment of the present invention is:

The side of the tripping electrode sheet 2 on which the lead-out leg 2-1 is provided faces the bottom of the box of the insulating case 1, and the tripping electrode piece 2 is positioned close to the bottom protruding point 1-3 of the insulating case 1 at this time. The lead pins 2-1 of the buckle electrode piece 2 naturally extend out of the middle hole through holes 1-4 of the case bottom. The lead electrode 5-2 on the upper electrode sheet 5 is opposed to the side wall through hole 1-5 of the insulating case 1, and the dowel or rivet 6 is passed through the upper corner hole 5-1 of the upper electrode plate 5 to be fastened to the insulation. In the hole of the four studs 1-2 at the bottom of the casing 1, the studs 1-2 can be softened by a hot pressing method into a flat flat pressing member to complete the installation.

Example 3

As shown in FIG. 4a and FIG. 4b, the difference between the embodiment and the previous two examples is that the insulating case 1 is not divided into two parts, and the deep insulating case is assembled on the same side. The box fastening assembly of the embodiment of the present invention is adopted. The assembly process of the surge protector is: the two-side notch of the lead-out 2-2 of the tripping electrode piece 2 is aligned with the card slot 1-6 on the insulating case 1, and the tripping electrode piece 2 is The bottom surface is closely attached to the bottom of the insulating box 1 and protrudes at points 1-3. Insert the MOV chip, cover the upper electrode plate 5, and pass the dowel or rivet 6 through the four-corner through hole 5-1 of the upper electrode plate 5, and fasten it in the hole of the four studs 1-2 at the bottom of the insulating case 1. The two sides of the lead-out electrode 7 are aligned with the card slots 1-7 on the insulating box body 1. At this time, the soldering points on the lead-out electrodes 7 are naturally pressed against the protruding planes 5-2 on the upper electrode plate 5, according to a conventional process. Welding, potting, loading the trip device, covering the upper cover, complete the assembly of the surge protector module box. The biggest difference between this embodiment and the previous two examples is that the trip bump is moved from the trip electrode sheet to the upper electrode plate.

The above-mentioned example of the fastening assembly method of the surge protector module of the present invention can be used not only in the above case but also on TPMOV, TMOV and the like.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes made by the scope of the present invention remain within the scope of the present invention.

Claims

A surge protector adopting a box-type fastening assembly structure, comprising: an insulating box body, at least one tripping electrode piece alternately disposed with at least one MOV chip, an upper electrode plate, and at least one tripping electrode The sheet, the at least one MOV chip, and the upper electrode plate are fixed in the insulating case by fasteners, and the bottom of the insulating case is attached to the tripping electrode sheet.
The surge protector adopting a box-type fastening assembly according to claim 1, wherein a bottom of the inner cavity of the insulating box body is provided with a fixing stud for fixing the at least with the fastener. A trip electrode sheet, at least one MOV chip, and an upper electrode plate.
The surge protector using the box-type fastening assembly according to claim 1, wherein the MOV chip jacket is provided with an insulating rubber sleeve.
The surge protector adopting a box-type fastening assembly according to claim 1, wherein the at least one tripping electrode piece, the at least one MOV chip, and the upper electrode plate are fixed in the insulating case to form a box. The fastening assembly structure is vacuum-sealed in the box fastening assembly structure.
The surge protector adopting a box-type fastening assembly according to claim 1, wherein the tripping electrode piece and the upper electrode plate each have at least one lead-out leg, and the lead-out leg is axially led out. Or radial lead.
A surge protector using a box-type fastening assembly according to claim 5, wherein a leading end of the insulating case is provided with an axial lead-out for the tripping electrode piece Or a radially outwardly extending through hole, wherein the leading side of the upper electrode clamping plate is axially led out, and the side wall of the insulating box body is also provided with a corresponding through hole for the leading leg of the upper electrode clamping plate.
A surge protector using a box-type fastening assembly according to claim 2, wherein said upper electrode plate is provided with a through hole or a threaded hole through which said fastener passes, said fixing The position of the stud corresponds to the position of a through hole or a threaded hole in the upper electrode plate, the fixing stud being provided with a cavity or an internally threaded cavity into which the fastener is fitted.
The surge protector using the box-type fastening assembly according to claim 1 or 7, wherein the fastener is a metal or non-metal rivet or a screw, and the length of the fastener is not more than The thickness of the upper electrode plate to the bottom of the insulating case.
The surge protector adopting a box-type fastening assembly according to claim 1, wherein the tripping electrode sheet is an aluminum electrode sheet, a copper electrode sheet, an iron electrode sheet or an aluminum alloy electrode sheet, and a copper alloy. The electrode sheet and the iron alloy electrode sheet; the upper electrode plate is an aluminum plate, a copper plate, an iron plate or an aluminum alloy plate, a copper alloy plate, and a ferroalloy plate.