CN200956352Y - Surge protector with thermal release device - Google Patents
Surge protector with thermal release device Download PDFInfo
- Publication number
- CN200956352Y CN200956352Y CN 200620107375 CN200620107375U CN200956352Y CN 200956352 Y CN200956352 Y CN 200956352Y CN 200620107375 CN200620107375 CN 200620107375 CN 200620107375 U CN200620107375 U CN 200620107375U CN 200956352 Y CN200956352 Y CN 200956352Y
- Authority
- CN
- China
- Prior art keywords
- slot
- inserted sheet
- surge protector
- thermal release
- release device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a surge protector with a thermal release device, which includes an insulation shell and a detachable device arranged inside. The detachable device comprises a conductive piece, a slot arranged on the conductive piece and a slot and a plug piece arranged at the electrified end, and the plug piece and the slot are connected through tin spot-welding. In case of too large current or too high temperature, the weld corner of the tin spot-weld is melted to detach the plug piece from the slot and protect the load. The utility model is characterized in simple structure, convenient use and convenient repair. An observatory window is arranged on the shell for users to easily observe and monitor.
Description
Technical field
The utility model relates to a kind of load protector, especially can make piezo-resistance when overload separate the inner high temperature that is connected with electrical network and fuse, and can conveniently judge whether a kind of Surge Protector with thermal release device (hereinafter to be referred as SPD) of disconnecting.
Background technology
At present, known SPD is linked in sequence by live end, top electrode, bottom electrode, flexible conductor, conducting strip and earth terminal, and flexible conductor plays the fusing effect, and when electric current was excessive, flexible conductor disconnected forming and opens circuit.But this structure defectiveness is because have only a burble point to be connected with flexible conductor, be equivalent to fuse, need very big power current to cause lead fusing, long when the SPD operating time, temperature is too high, and flexible conductor can break not open when electric current increased, and makes the overheated damage in advance of resistor disc.And when SPD very big in electric power when the heavy impulse current, flexible conductor and solder joint thereof are easily broken, and may have electric arc, flexible conductor will be burnt, therefore misoperation or be failure to actuate morely in use, influence is used.
Someone has done research and has applied for that patent, the patent No. are 02220189.0 for improvement, name is called overvoltage fuse.This overvoltage fuse is provided with input lead-in wire, output lead-in wire and piezo-resistance; one end of piezo-resistance is provided with conductive layer; the right-hand member of conductive layer is welded with the metal spring sheet that elastic force makes progress; the other end of metal spring sheet and the welding of the upper surface of piezo-resistance; excessive when electric current, fusing leg (reality also is to have adopted low melting point scolding tin) leans on the elastic force of metal spring sheet to separate with piezo-resistance; open circuit plays a protective role.But this structure is not too reliable, owing to adopted the more aforesaid structure progress of low temperature tin welding spot isolating construction, but the action too early before piezo-resistance there is not damage of this fuse is separated, or when surpassing the heavy impulse current of 60kA because solder joint is overheated has moved in advance, its shortcoming is that solder joint has only one, and contact-making surface is too little, and electrodynamic influence is not considered in the welding position, and the heat radiation that is exactly piezo-resistance in addition is not enough.
Summary of the invention
The utility model has the deficiency of potential safety hazard when having solved flexible conductor among the SPD and solder joint improper fusing and fusing, provide a kind of can overload fusing and the SPD that fuses of high temperature.
The utility model has also solved common SPD and can not conveniently check, provides a kind of and can detect conveniently whether trip gear disconnects among the SPD, judges whether fault SPD out of service of SPD.
Its technical problem that solves the utility model adopts the ground technical scheme to be: a kind of SPD, in insulation crust, be connected to form the loop by separable device between the live end of resistor disc and the earth terminal, wherein, top electrode in the separator and bottom electrode respectively have slot, between slot and the slot is to be connected by inserted sheet, is provided with return mechanism between inserted sheet and the housing.Between two slots certain clearance is arranged, so that form breakpoint at interval behind the separating action, the syndeton of slot and inserted sheet can effectively stop electric power; Setting up return mechanism is in order to compare when inserted sheet leaves slot smoothly, the situation that also links to each other with slot can not to take place.
Wherein, the size of described slot forms matched in clearance greater than the size of inserted sheet, and inserted sheet is to adopt special low melting point soldering to be connected with slot.Gapped between inserted sheet and the slot is in order to guarantee that inserted sheet can not block because of being offset more a little, can't separate inserted sheet smoothly with slot when detaching slot; Inserted sheet adopts the reason of welding to be because different welding substance can be melted under the situation of different temperatures with the connection of slot, makes soldered object separate the material of leg, shape and bonding strength that highly determines soldered object and the required temperature of separating.
As preferably, slot is the C type, opening outwardly, the parallel placement of two slots is at the centre position spot welding of slot end, circular leg.Slot is the C type, so the opening of slot has certain elasticity, is convenient to soldering and melts the back inserted sheet and withdraw from slot, also can separate smoothly even skew has taken place inserted sheet, can set up insulator for guaranteeing insulation effect between slot and slot.
As preferably, inserted sheet is the U type, and the conduction limit is connected with slot, and guide edge is vertical with the conduction limit, highly less than the thickness of shell, conducts electricity limit and guide edge by the base connection, is separated with insulator between guide edge and the slot.It is for keeping parallelism as far as possible in separation process that inserted sheet is provided with guide edge, does not produce friction with slot; In order to guarantee safety, between guide edge and slot, insulator is set, prevented to cause danger when foreign matter from entering.
The size of control top electrode 8 and bottom electrode 14 wherein mainly is the size of welding slot, increases the area of dissipation of piezo-resistance and the contact area of welding position, the thermal accumlation in the time of can reducing heavy impulse current.
The structure of return mechanism can adopt various ways, allow to rely on gravity that inserted sheet is separated with slot as the installation site, or inserted sheet is separated with slot with elastomeric objects effect inserted sheet, as preferably, return mechanism adopts 1 or some springs, one end is fixed on the base of inserted sheet, and an end is fixed on housing.
In order to match with guide edge, housing is provided with gathering sill, and is parallel with the answer direction of inserted sheet, and the width of gathering sill is more than or equal to the thickness of inserted sheet, and the guide edge of inserted sheet is stuck on the gathering sill.Gathering sill is that inserted sheet withdraws from the slot guiding to reduce the friction of inserted sheet and slot.
Whether separate with slot for the ease of observing inserted sheet, the gathering sill shell body of close tab end portion is provided with observation window, is covered with a transparent insulation cover above.Insulating cover is the safety for the observer, prevents to touch because of carelessness charged inserted sheet and causes accident, prevents that also foreign matter from entering SPD.
The beneficial effects of the utility model are: the electricity consumption situation of watch-dog constantly; excessive at electric current; when being enough to damage piezo-resistance, the long or short circuit at overload time and elevating the temperature, effectively open circuit; load on the protective circuit; and can conveniently observe and whether be the former of fuse thereby circuit is disconnected, be convenient to maintenance, need not from the beginning to detect; the utility model is simple in structure, and cost is low.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model;
Fig. 2 is the structural representation of a kind of slot of the utility model;
Fig. 3 is the structural representation of a kind of inserted sheet of the utility model;
Fig. 4 is the right view of a kind of inserted sheet of the utility model.
Among the figure: 1, live end, 2, slot, 3, inserted sheet, 4, insulator, 5, observation window, 6, gathering sill, 7, return mechanism, 8, top electrode, 9, earth terminal, 10, housing, 11, guide edge, 12, the conduction limit, 13, base 14, bottom electrode
Embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: on insulation crust, be provided with live end 1 and earth terminal 9, be provided with separable device between live end 1 and the earth terminal 9, be respectively that live end 1 links to each other with bottom electrode 14, earth terminal 9 links to each other with top electrode 8, be provided with slot 2 at the top electrode 8 of separable device and an end of bottom electrode 14, the shape of slot is the C type, opening is (referring to accompanying drawing 2) outwardly, the parallel placement of two slots, there is certain clearance the centre, two slots are to connect by inserted sheet 3, centre position tin electric welding at the opening two ends of slot, make inserted sheet and slot be linked to be a conducting loop, inserted sheet is the U type, divide conduction limit 12, guide edge 11, with base 13 both sides are coupled together again, guide edge is vertical with the conduction limit with the base, the width on conduction limit is less than the inner width of slot, the height of guide edge is less than the degree of depth (referring to accompanying drawing 3 accompanying drawings 4) of gathering sill 6, housing is provided with gathering sill, parallel with the answer direction of inserted sheet, the width of gathering sill is more than or equal to the thickness of inserted sheet, and the guide edge 11 of inserted sheet is stuck on the gathering sill, is separated with insulator 4 between guide edge and the slot, prevent to make when foreign matter from entering inserted sheet and slot that other conduction mode is arranged, being provided with observation window 5 near on the gathering sill shell body of tab end portion, be covered with a transparent insulation cover above, whether observe when there is fault on the power supply road is the reason that SPD disconnects, between inserted sheet and housing, be provided with return mechanism 7, return mechanism adopts 2 springs, and an end is fixed on the base of inserted sheet, and an end is fixed on housing.
When big electric current passes through SPD; or cause SPD to bear big electric current because of the short circuit of circuit; or because having surpassed official hour, stream time make the temperature of SPD continue to rise; when temperature reaches the fusing point of low melting point soldering; leg melts; extract under the effect of spring for 2 li from slot on the conduction limit 12 of inserted sheet, output and input is formed open circuit, thereby protected load.
Claims (7)
1, a kind of Surge Protector with thermal release device; in insulation crust; be connected to form the loop by separable device between the live end of piezoresistive wafer and the earth terminal; it is characterized in that: have two separation point positions between live end (1) and the earth terminal (9); it is the slot (2) on bottom electrode (14) and the top electrode (8); between slot and the slot is to be connected by inserted sheet (3), is provided with return mechanism (7) between inserted sheet and the housing (10).
2, the Surge Protector of band thermal release device according to claim 1 is characterized in that: the size of slot (2) forms matched in clearance greater than the size of inserted sheet (3), and inserted sheet and slot are to adopt the low melting point tin welding.
3, the Surge Protector of band thermal release device according to claim 2 is characterized in that: slot (2) is the C type, opening outwardly, the parallel placement of two slots (2).
4, the Surge Protector of band thermal release device according to claim 3; it is characterized in that: inserted sheet (3) is the U type; conduction limit (12) is connected with slot (2); guide edge (11) is vertical with the conduction limit; height is less than the thickness of shell; connect conduction limit and guide edge by base (13), be separated with insulator (4) between guide edge and the slot.
5, according to claim 1 or 2 or the Surge Protector of 3 or 4 described band thermal release devices, it is characterized in that: return mechanism (7) adopts 1 or some springs, and an end is fixed on the base (13) of inserted sheet (3), and an end is fixed on housing (10).
6, according to claim 1 or 2 or the Surge Protector of 3 or 4 described band thermal release devices; it is characterized in that: housing (10) is provided with gathering sill (6); parallel with the answer direction of inserted sheet (3); the width of gathering sill (6) is more than or equal to the thickness of inserted sheet (3), and the guide edge of inserted sheet (11) is stuck on the gathering sill (6).
7, the Surge Protector of band thermal release device according to claim 6 is characterized in that: gathering sill (6) shell body (10) near inserted sheet (3) end is provided with observation window (5), is covered with a transparent insulation cover above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107375 CN200956352Y (en) | 2006-09-04 | 2006-09-04 | Surge protector with thermal release device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620107375 CN200956352Y (en) | 2006-09-04 | 2006-09-04 | Surge protector with thermal release device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200956352Y true CN200956352Y (en) | 2007-10-03 |
Family
ID=38774936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620107375 Expired - Fee Related CN200956352Y (en) | 2006-09-04 | 2006-09-04 | Surge protector with thermal release device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200956352Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889375B (en) * | 2007-11-21 | 2013-05-15 | 埃普科斯股份有限公司 | Surge arrester having thermal overload protection |
-
2006
- 2006-09-04 CN CN 200620107375 patent/CN200956352Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889375B (en) * | 2007-11-21 | 2013-05-15 | 埃普科斯股份有限公司 | Surge arrester having thermal overload protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |