CN204303722U - Surge protector and thermal tripping mechanism thereof - Google Patents
Surge protector and thermal tripping mechanism thereof Download PDFInfo
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- CN204303722U CN204303722U CN201420786164.7U CN201420786164U CN204303722U CN 204303722 U CN204303722 U CN 204303722U CN 201420786164 U CN201420786164 U CN 201420786164U CN 204303722 U CN204303722 U CN 204303722U
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Abstract
The utility model discloses a kind of surge protector and thermal tripping mechanism thereof, and wherein the thermal tripping mechanism of surge protector comprises elastic component and slide unit.Can move in housing in the housing that slide unit is arranged on surge protector.Elastic component is connected with slide unit, and elastic component utilizes elastic force to drive slide unit to move.Two first protection elements with one second protect element to form Y type layout, first protect element and second protect the pin of element to be connected by hot fusible material.First protection element is fixedly mounted in the housing of surge protector, and the second protection element is arranged on slide unit and also can moves with slide unit.Two first protection elements are all in normal working temperature, and hot fusible material is not heated, and two first protection elements and the second protection element form conductive path by connector, and elastic component is in energy storage state; One of them first protection element heats up, and hot fusible material is heated fusing, and elastic component releases energy, and drive slide unit and the second protection element to move, conductive path is disconnected.
Description
Technical field
The utility model relates to Low Voltage Electrical Apparatus, more particularly, relates to the surge protector in low-voltage electrical apparatus.
Background technology
In low-voltage distribution system, to due to ectocine, the overvoltage that such as thunder and lightning causes, uses surge protector (Surge Protection Device, SPD) to protect usually.III class surge protector (SPD) is used for protection terminal appliance.Current stage, on market, existing III class SPD mainly provides common mode to protect.Because common mode protection has some limitations, wish there is a kind of surge protector that common mode protection and differential mode protected mode can be provided simultaneously.
The surge protector of Y type layout can provide common mode to protect and differential mode protection simultaneously.So-called Y type layout refers to that surge protector comprises two first protections element (being generally piezo-resistance) and one second protection element (being generally discharge tube), and two piezo-resistances share an electrode and connect with a discharge tube.Three elements be connected to form y-type structure.
The key of Y type layout is the design of two thermal tripping mechanisms between piezo-resistance and discharge tube.The basic protection philosophy of surge protector is: the turning circuit when there being overvoltage, leakage current, and when without overvoltage, almost no current passes through.But when surge protector occurs that deterioration causes temperature rise, also can the situation of safety cutout circuit, be now a kind of situation that losing efficacy appears in surge protector.The deterioration of surge protector heats up and causes piezo-resistance heating up, to thermal tripping mechanism heating, thermal tripping mechanism is departed from, is disconnected by circuit.In the surge protector of existing Y type layout, thermal tripping mechanism has electronic type and mechanical type two kinds.The hot releasing structure of electronic type mainly adopts temperature fuse.Although temperature fuse has high reliability in design, the abnormal conditions that single temperature fuse can be dealt with are limited after all.Add that the effect of the unforeseen force majeure such as ageing failure temperature fuse of ordering sustains damage and can not normally play a role, then can not cutoff circuit in time when surge protection element thermal failure.Therefore the reliability of temperature fuse is lower.In addition, temperature fuse welding difficulty is large, and common welding manner easily causes temperature fuse surprisingly to fuse, so can only adopt the mode of the local weldings such as Laser Welding.The pin of multiple surge protection element is mainly welded together by low-melting alloy by the hot releasing structure of mechanical type.The quantity of solder joint has one or more two kinds selections.If adopt a solder joint, be then that the pin of two piezo-resistances and a discharge tube is all welded on a place, welding difficulty is large, easy wire drawing during dropout.If adopt multiple solder joint, then heat is not easy to concentrate, and causes Interruption unstable.
Utility model content
The utility model is intended to propose a kind of surge protector and thermal tripping mechanism thereof, easily stably can realize the Y type interior layout of surge protector, realizes common mode protection and differential mode protection simultaneously.
According to an embodiment of the present utility model, propose a kind of thermal tripping mechanism of surge protector, comprise elastic component and slide unit.Can move in the housing of surge protector in the housing that slide unit is arranged on surge protector.Elastic component is connected with slide unit, and elastic component utilizes elastic force to drive slide unit to move.Two first protection elements with one second protect element to form Y type layout, two first protect elements protect the pin of element to be connected by hot fusible material with one second.Two first protection elements are fixedly mounted in the housing of surge protector, and the second protection element is arranged on slide unit and also can moves with slide unit.Two first protection elements are all in normal working temperature, and hot fusible material is not heated, and two first protection elements and the second protection element form conductive path by connector, elastic component energy storage; One of them first protection element heats up, and hot fusible material is heated fusing, and elastic component releases energy, and drive slide unit and the second protection element to move, conductive path is disconnected.
In one embodiment, elastic component is spring, and one end of spring is fixed in the housing of surge protector, and the other end of spring is fixed on slide unit, and spring is by compressed energy-storage.Form chute in housing, slide unit can move along chute.Spring relaxation releases energy, promotes slide unit and drives the second protection element to move.
According to an embodiment of the present utility model, propose a kind of surge protector, comprise housing, the first protection element, the second protection element, slide unit and elastic component.Forming element support in housing, the outline of housing has pin openings and signal opening.Two first protection elements and one second protection element; be arranged on the element bracket in housing; wherein two first protection elements and one second protection element form Y type layout; element bracket comprises partition wall; two first protection elements are fixedly mounted on the both sides of partition wall respectively; first pin of the first protection element is connected with pin respectively with the first pin of the second protection element, and pin is extended to outside housing by pin openings.Slide unit is arranged in housing and also can moves in housing, and the second protection element is arranged on slide unit and also can moves with slide unit.Elastic component is connected with slide unit, and elastic component utilizes elastic force to drive slide unit to move.Second pin of two first protection elements protects the second pin of element to be connected by hot fusible material with one second.Two first protection elements are all in normal working temperature, and hot fusible material is not heated, and two first protection elements and the second protection element form conductive path by connector, elastic component energy storage; One of them first protection element heats up, and hot fusible material is heated fusing, and elastic component releases energy, and drive slide unit and the second protection element to move, conductive path is disconnected.
In one embodiment, elastic component is spring, and one end of spring is fixed in housing, and the other end of spring is fixed on slide unit, and spring is by compressed energy-storage.Form chute in housing, slide unit can move along chute.Spring relaxation releases energy, promotes slide unit and drives the second protection element to move.
In one embodiment; slide unit is arranged on the below of two first protection elements; second pin of the second protection element upwards extends; form lateral separation structure after second bending pins of two first protection elements, the second pin of the second protection element is placed in the middle of this lateral separation structure.
In one embodiment; first protection element be piezo-resistance; second protection element is discharge tube; hot fusible material is low-melting alloy, the second pin of the second protection element by low-melting alloy and by two first protection elements the lateral separation structure weldings that formed of the second pin together with.
In one embodiment, the bottom of housing is formed with dovetail groove, and dovetail groove narrows from top to bottom gradually.
In one embodiment, surge protector is arranged in the U-type groove on pedestal, U-type groove has the locating piece coordinated with dovetail groove.
In one embodiment, locating piece comprises bar portion and end, and end is greater than bar portion, and formation two ends, end are the angular guide surfaces of arc surface.
Surge protector of the present utility model achieves the Y type layout of inner member reliable and easy for installation by its thermal tripping mechanism, makes III class surge protector can realize common mode protection and differential mode protection simultaneously.The housing bottom of surge protector is formed with dovetail groove, and dovetail groove coordinates with the locating piece on pedestal, surge protector is connected reliably, easy accessibility with pedestal.
Accompanying drawing explanation
The above and other feature of the utility model, character and advantage are by more obvious by what become below in conjunction with the description of drawings and Examples, and Reference numeral identical in the accompanying drawings represents identical feature all the time, wherein:
Figure 1A and Fig. 1 B discloses the structure chart of the surge protector according to an embodiment of the present utility model from different directions, and the surge protector in Figure 1A and Fig. 1 B is in non-trip status.
Fig. 2 discloses the structure chart of the surge protector according to an embodiment of the present utility model, and the surge protector in Fig. 2 is in trip status.
Fig. 3 discloses the structural representation coordinated with pedestal according to the surge protector of an embodiment of the present utility model.
Fig. 4 discloses the enlarged drawing of dovetail groove and locating piece when coordinating with pedestal according to the surge protector of an embodiment of the present utility model.
Detailed description of the invention
First, herein used term " connection " is described.Relate to machinery and electrical structure herein, therefore term " connection " comprises mechanical connection and is electrically connected double implication.Mechanical connection is required to meet mechanical strength and mechanically actuated, and electrical attachment requirements meets electrically conducting.For a person skilled in the art, in conjunction with context can be well understood to each place use " connections " refer to mechanical connection, be electrically connected or both be all.
With reference to Figure 1A and Fig. 1 B, the utility model discloses a kind of surge protector.Figure 1A and Fig. 1 B discloses the structure of this surge protector from different directions.This surge protector comprises: housing, the first protection element, the second protection element, slide unit and elastic component.
Forming element support in housing 101, element bracket comprises partition wall, and partition wall is for separating two first protections element (piezo-resistance).The outline of housing forms opening, and opening comprises pin openings (mark) and signal opening 113 (with reference to figure 2).Housing by insulating materials, such as plastic production.
Two first protection elements 103 and one second protection element 104 are arranged on the element bracket in housing.In one embodiment, the first protection element 103 is piezo-resistances, is disk piezo-resistance in the illustrated embodiment in which.Second protection element 104 is discharge tubes.Two piezo-resistances 103 are assemblied in the both sides of partition wall respectively.Partition wall is a part for housing, and partition wall is also that insulating materials makes, and is same material with housing.Each first protection element, namely piezo-resistance has two pins.First pin of two piezo-resistances is connected with a pin respectively, and pin is extended to outside housing by the pin openings on housing.In the accompanying drawings, the pin be connected with the first pin of piezo-resistance is marked as 114a.Second protection element, namely discharge tube 104 is arranged on slide unit, and slide unit is positioned at the below of mounting bracket and the first protection element, can describe in detail below.Second protection element 104, namely discharge tube has two pins equally.First pin of discharge tube is also connected to a pin, and pin is extended to outside housing by the pin openings on housing.In the accompanying drawings, the pin be connected with the first pin of discharge tube is marked as 114b.
Slide unit 102 is arranged in housing 101 and also can moves in housing.Second protection element 104 (discharge tube) is arranged in slide unit 102 also can move with slide unit.In the illustrated embodiment in which, form chute in housing 101, slide unit 102 can move along chute.Chute is positioned at the below of element bracket and two first protections element 103 (piezo-resistance), and thus slide unit 102 and the second protection element 104 (discharge tube) are also positioned at the below of piezo-resistance.Second pin 108 of the second protection element 104 upwards extends.Elastic component 105 is connected with slide unit 102, and elastic component 105 utilizes elastic force to drive slide unit 102 to move.In the illustrated embodiment in which, elastic component 105 is springs, and one end of spring is fixed in housing 101, and the other end of spring is fixed on slide unit 102.Spring is in energy storage state when surge protector normally works, and releases energy when needs are threaded off.In the illustrated embodiment in which, spring 105 when surge protector normally works by compressed energy-storage.When energy released by spring 105, spring 105 promotes slide unit 102, and slide unit 102 drives the second protection element 104 to move together.
Continue with reference to Figure 1A and Fig. 1 B; second pin 107 of two first protections element 103 (piezo-resistance) bends; its formation lateral separation, lateral part structure; so-called lateral separation structure refers to; two the second pins 107 have vertical direction to be bent into horizontal direction, and leave interval between.Second pin 108 of the second protection element 104 (discharge tube) is placed in the middle of this lateral separation structure.Further, the second pin of discharge tube and the second pin of piezo-resistance are welded together by hot fusible material.In one embodiment, hot fusible material is low-melting alloy, such as low temperature scolding tin.Second pin 108 of the second protection element by low-melting alloy and by two first protection elements the lateral separation structure weldings that formed of the second pin 107 together with.
In conjunction with Figure 1A, Figure 1B and Fig. 2, the dropout course of work of this surge protector is as follows:
Figure 1A and Fig. 1 B discloses the structure chart of surge protector in normal operation position from different directions.Fig. 2 discloses the structure chart of surge protector at open position.When normally working, two piezo-resistances (the first protection element) are all in normal working temperature, and the pin of piezo-resistance and the pin of discharge tube, in solid state, are joined together by low-melting alloy (hot fusible material).Spring is in by the state of compressed energy-storage, as shown in Figure 1A and 1B.At this moment pin, piezo-resistance, discharge tube, pin form electric path.When deterioration appears in wherein one or two piezo-resistance, leakage current increases, and causes temperature constantly to rise.Or exceed desired value when overvoltage, puncture piezo-resistance and discharge tube when causing short circuit, temperature also can be caused sharply to raise.Temperature rises and low-melting alloy is melted.Now spring be not subject to external force, can loosen under the effect of natural resiliency power, promote slide unit to move along chute, the discharge tube be placed in slide unit moves with slide unit, second pin of discharge tube and the second pin of piezo-resistance depart from, electric path is cut off, and realizes threading off, as shown in Figure 2.Continue with reference to figure 2, after slide unit 102 moves, script the signal opening 113 that blocks by slide unit 102 be in open state.In one embodiment, ON signal opening 113 matches with the warning device on base, and when signal opening 113 is open, warning device can be reported to the police, and informs and has occurred dropout situation.
With reference to figure 3 and Fig. 4, conveniently the coordinating of surge protector and pedestal, surge protector of the present utility model have also been devised the structure coordinated with pedestal on housing.Fig. 3 discloses the structural representation coordinated with pedestal according to the surge protector of an embodiment of the present utility model.The housing 101 of surge protector is installed in the U-type groove on pedestal 111, and the bottom of housing 101 is formed with dovetail groove 106, and two sides of dovetail groove 106 narrow from top to bottom gradually, forms the inclined-plane inwardly shunk.The U-type groove of pedestal has the locating piece 112 coordinated with dovetail groove.Fig. 4 discloses the enlarged drawing of dovetail groove and locating piece when coordinating with pedestal according to the surge protector of an embodiment of the present utility model.Visible with reference to figure 4, locating piece 112 comprises bar portion and end, and end is greater than bar portion, and formation two ends, end are the angular guide surfaces of arc surface.The guiding inclined plane of end coordinates with the inclined-plane of the inside contraction of dovetail groove 106; guide housing 101 is installed in the U-type groove of pedestal; after housing 101 is in place, dovetail groove 106 is blocked in the end of locating piece 112, and surge protector is fixedly mounted on pedestal.When needs take out surge protector, can there is certain deformation in locating piece 112, as shown in the dotted portion in Fig. 4, locating piece 112 can outwards open, and dovetail groove 106 can be exited, to take off surge protector from pedestal from two locating pieces 112.
Although the above embodiments are carried out in conjunction with the surge protector of said structure; but those skilled in the art is to be understood that; thermal tripping mechanism wherein can be applied in the surge protector of other structures, and this thermal tripping mechanism is appreciated that to have following design:
A thermal tripping mechanism for surge protector, comprises elastic component and slide unit;
Also can move in the housing of surge protector in the housing of slide unit surge protector;
Elastic component is connected with slide unit, and elastic component utilizes elastic force to drive slide unit to move;
Two first protection elements with one second protect element to form Y type layout, two first protect elements protect the pin of element to be connected by hot fusible material with one second;
Two first protection elements are fixedly mounted in the housing of surge protector, and the second protection element is arranged on slide unit and also can moves with slide unit;
Two first protection elements are all in normal working temperature, and hot fusible material is not heated, and two first protection elements and the second protection element form conductive path by connector, and elastic component is in energy storage state; One of them first protection element heats up, and hot fusible material is heated fusing, and elastic component releases energy, and drive slide unit and the second protection element to move, conductive path is disconnected.
Elastic component is spring, and one end of spring is fixed in the housing of surge protector, and the other end of spring is fixed on slide unit, and spring is by compressed energy-storage.Form chute in housing, slide unit can move along chute.Spring relaxation releases energy, promotes slide unit and drives the second protection element to move
Surge protector of the present utility model achieves the Y type layout of inner member reliable and easy for installation by its thermal tripping mechanism, makes III class surge protector can realize common mode protection and differential mode protection simultaneously.The housing bottom of surge protector is formed with dovetail groove, and dovetail groove coordinates with the locating piece on pedestal, surge protector is connected reliably, easy accessibility with pedestal.
Above-described embodiment is available to be familiar with person in the art to realize or to use of the present utility model; those skilled in the art can when not departing from utility model thought of the present utility model; various modifications or change are made to above-described embodiment; thus protection domain of the present utility model not limit by above-described embodiment, and should be the maximum magnitude meeting the inventive features that claims are mentioned.
Claims (9)
1. a thermal tripping mechanism for surge protector, is characterized in that, comprises elastic component and slide unit;
Can move in the housing of surge protector in the housing that described slide unit is arranged on surge protector;
Described elastic component is connected with slide unit, and described elastic component utilizes elastic force to drive slide unit to move;
Two first protection elements with one second protect element to form Y type layout, two first protect elements protect the pin of element to be connected by hot fusible material with one second;
Two first protection elements are fixedly mounted in the housing of surge protector, and the second protection element is arranged on slide unit and also can moves with slide unit;
Two first protection elements are all in normal working temperature, and hot fusible material is not heated, and two first protection elements and the second protection element form conductive path by connector, elastic component energy storage; One of them first protection element heats up, and hot fusible material is heated fusing, and elastic component releases energy, and drive slide unit and the second protection element to move, conductive path is disconnected.
2. the thermal tripping mechanism of surge protector as claimed in claim 1, is characterized in that,
Described elastic component is spring, and one end of spring is fixed in the housing of surge protector, and the other end of spring is fixed on slide unit, and spring is by compressed energy-storage;
Form chute in described housing, slide unit can move along chute;
Spring relaxation releases energy, promotes slide unit and drives the second protection element to move.
3. a surge protector, is characterized in that, comprising:
Housing, forming element support in described housing, the outline of described housing has pin openings and signal opening;
Two first protection elements and one second protection element, be arranged on the element bracket in housing, wherein two first protection elements and one second protection element form Y type layout, described element bracket comprises partition wall, two first protection elements are fixedly mounted on the both sides of partition wall respectively, first pin of the first protection element is connected with pin respectively with the first pin of the second protection element, and pin extends to outside housing by pin openings;
Slide unit, is arranged in housing and also can moves in housing, and described second protection element is arranged on slide unit and also can moves with slide unit;
Elastic component, is connected with slide unit, and elastic component utilizes elastic force to drive slide unit to move;
Second pin of two first protection elements protects the second pin of element to be connected by hot fusible material with one second;
Two first protection elements are all in normal working temperature, and hot fusible material is not heated, and two first protection elements and the second protection element form conductive path by connector, elastic component energy storage; One of them first protection element heats up, and hot fusible material is heated fusing, and elastic component releases energy, and drive slide unit and the second protection element to move, conductive path is disconnected.
4. surge protector as claimed in claim 3, is characterized in that,
Described elastic component is spring, and one end of spring is fixed in housing, and the other end of spring is fixed on slide unit, and spring is by compressed energy-storage;
Form chute in described housing, slide unit can move along chute;
Spring relaxation releases energy, promotes slide unit and drives the second protection element to move.
5. surge protector as claimed in claim 4; it is characterized in that; described slide unit is arranged on the below of two first protection elements; second pin of the second protection element upwards extends; form lateral separation structure after second bending pins of two first protection elements, the second pin of the second protection element is placed in the middle of this lateral separation structure.
6. surge protector as claimed in claim 5; it is characterized in that; described first protection element be piezo-resistance; described second protection element is discharge tube; described hot fusible material is low-melting alloy, the second pin of the second protection element by low-melting alloy and by two first protection elements the lateral separation structure weldings that formed of the second pin together with.
7. surge protector as claimed in claim 3, it is characterized in that, the bottom of described housing is formed with dovetail groove, and dovetail groove narrows from top to bottom gradually.
8. surge protector as claimed in claim 7, it is characterized in that, described surge protector is arranged in the U-type groove on pedestal, described U-type groove has the locating piece coordinated with dovetail groove.
9. surge protector as claimed in claim 8, it is characterized in that, described locating piece comprises bar portion and end, and described end is greater than described bar portion, and formation two ends, described end are the angular guide surfaces of arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786164.7U CN204303722U (en) | 2014-12-11 | 2014-12-11 | Surge protector and thermal tripping mechanism thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786164.7U CN204303722U (en) | 2014-12-11 | 2014-12-11 | Surge protector and thermal tripping mechanism thereof |
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| Publication Number | Publication Date |
|---|---|
| CN204303722U true CN204303722U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420786164.7U Active CN204303722U (en) | 2014-12-11 | 2014-12-11 | Surge protector and thermal tripping mechanism thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294078A (en) * | 2017-06-09 | 2017-10-24 | 深圳科安达电子科技股份有限公司 | A kind of safety-type lightning-protection module |
-
2014
- 2014-12-11 CN CN201420786164.7U patent/CN204303722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294078A (en) * | 2017-06-09 | 2017-10-24 | 深圳科安达电子科技股份有限公司 | A kind of safety-type lightning-protection module |
| CN107294078B (en) * | 2017-06-09 | 2020-03-31 | 深圳科安达电子科技股份有限公司 | Safe type lightning protection module |
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