CN1197277A - Realizing method and device for protecting and warning when resistance of security device losing efficacy - Google Patents
Realizing method and device for protecting and warning when resistance of security device losing efficacy Download PDFInfo
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- CN1197277A CN1197277A CN 98108505 CN98108505A CN1197277A CN 1197277 A CN1197277 A CN 1197277A CN 98108505 CN98108505 CN 98108505 CN 98108505 A CN98108505 A CN 98108505A CN 1197277 A CN1197277 A CN 1197277A
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- thermistor
- hot melt
- melt sheet
- alarm
- terne metal
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Abstract
A method for failure protection and alarm of thermosensitive resistor in security device features that the thermosensitive resistor with positive temp coefficient and generating heat because of overcurrent flowing it for a long time is installed close to one side of a thermofusible Pb-Sn alloy piece in order to conduct the heat of thermosensitive resistor to the alloy piece. When the temp. of alloy piece reaches a certain value, the alloy piece deforms plastically. Under the action of spring, the grounding reed displaces to force external lines A and B to ground, sending sound and light alarms.
Description
The present invention relates to the implementation method and the device thereof of long-time overcurrent fail safe of a kind of distributing frame and alarm, exactly, relate to method and device thereof that a kind of PTC of utilization thermistor is realized long-time overcurrent fail safe and alarm.
One side connects exchange line, opposite side connects the main frame of the inside cable wiring of switch entrance and exit, (claims: protector) for the operate as normal that guarantees switch must be provided with Security Unit with preventing the person and equipment from suffering the overvoltage overcurrent injury that is entered by outside line on main frame.The main source of this overvoltage, overcurrent is: 1, in the outside line or near the surge that causes of thunderbolt; When 2, near power line the outside line or electric device and railway electrification system break down, the alternating voltage that in outside line, induces; 3, the direct collision of outside line and 220 volts of power lines or city trolley bus electric wire.
Now; main frame equipment has all adopted the protector that is made of elements such as PTC (Positive temperature cofficient) semistor, gas discharge tube and terne metal hot melt sheets, and this device can be born overcurrent or the protection of superpotential instantaneous operation and overvoltage fail safe and the in time function of alarm for a long time at present.The operation principle of discharge tube fail safe mechanism wherein is: when discharge tube discharges for a long time; the heat energy that discharge tube produces will make the hot melt sheet generation plastic deformation with its next-door neighbour; again under the elastic force effect; make discharge tube and ground wire short circuit and make outside line a line or the direct ground connection of b line; send the alarm call snap simultaneously and show, realize fail safe.Yet a major defect of existing protector is the function that does not have long-time overcurrent fail safe and alarm.Just, run into overload situations in outside line, deficiency is so that discharge tube when discharging over the ground, then bears overload by the PTC thermistor again, and this moment, the interior resistive of thermistor was big, becomes the high resistive relative open-circuit condition that is.Because thermistor two ends long term overloading, can not produce the inefficacy action protection again and the ground connection earial drainage, the heat energy that makes generation it on is preserved on protector and damage equipment; And because of thermistor is in the overload powering state, be not intended to touching, can cause very big danger personal safety as operating personnel; Moreover because of not producing the audible and visual alarm signal, operating personnel can not in time find fault and get rid of it as early as possible, will make this fault effects distributing frame operate as normal.
The purpose of this invention is to provide a kind of thermistor that utilizes that can address the aforementioned drawbacks and realize the method and the device thereof of long-time overcurrent fail safe and alarm.
The method of long-time overcurrent fail safe of the present invention is achieved in that in the casing of protector; the semistor that the long-time overcurrent of carrying is generated heat is close to a side of pressing close to be installed in terne metal hot melt sheet; make the heat energy that produces on the thermistor can conduct to this terne metal hot melt sheet; and when this terne metal hot melt sheet reaches uniform temperature; make this hot melt sheet produce plastic deformation; again under the elastic force effect of stage clip; the a line or the b line ground connection that make its grounding reed displacement and allow outside line; simultaneously, in time connect warning circuit and send the audible and visual alarm signal.
Wherein the material of the thermistor of positive temperature coefficient can be high molecular, also can be ceramic.
Wherein terne metal hot melt sheet can be one, and the next-door neighbour is installed in the middle of gas discharge tube and the PTC thermistor; Also can be two, the next-door neighbour reclines and is installed in a side of gas discharge tube and PTC thermistor respectively.
Wherein the plastic deformation temperatures of heat fusing can be selected the product of different temperatures parameter as required.
The device of thermistor fail safe of the present invention and alarm is achieved in that and includes casing; stage clip; discharge tube; terne metal hot melt sheet; thermistor; wiring reed and the sound and light alarm device of forming by light-emitting diode; parallel longitudinal is installed in proper order and is provided with two row by stage clip in type casing; gas discharge tube; FS terne metal hot melt sheet and the long-time overvoltage discharge unloading protecting mechanism that is positioned at that the ground connection earial drainage reed with the stage clip interlock in the middle of the two row elements constitutes; wherein the gas discharge tube next-door neighbour is installed in a side of fail safe terne metal hot melt sheet; the inboard of casing is installed on the distribution reed; be installed on alarm indication light-emitting diode on the external handle end face of casing; it is characterized in that: the opposite side of the FS terne metal hot melt sheet in casing is close to the thermistor of pressing close to be installed on positive temperature coefficient, makes the heat energy that produces on the thermistor can conduct to terne metal hot melt sheet.
The end face of wherein installing the casing external handle of alarm indication light-emitting diode takes the form of inclined plane.
Characteristics of the present invention are by the architecture advances to original main frame protector, gas discharge tube and PTC thermistor are close to respectively recline and are installed in the both sides of fail safe [fail--safe (FS)] terne metal hot melt sheet, when protector runs into long-time overcurrent overload, and discharge tube is can not the ground connection earial drainage time, the thermal energy conduction that the PTC thermistor is overloaded for a long time produce is given terne metal hot melt sheet, make it to produce plastic deformation, again under the effect of stage clip elastic force, make its grounding reed displacement and a line or the b line ground connection that allow outside line; In time connect warning circuit simultaneously and send the audible and visual alarm signal.The invention solves the fail safe and the alarm of the long-time overcurrent of main frame, the further perfect fail safe function of protector helps safeguard work personnel's the personal safety and the normal operation of equipment.In addition, the present invention has also done adjustment to the installation site of the alarm indicator of protector, makes it to be more prone to discover so that in time fix a breakdown.
Specifically introduce implementation method of the present invention and device construction thereof below in conjunction with drawings and Examples.
Fig. 1 is the one embodiment of the invention structural representation;
Fig. 2 is the schematic perspective view of one embodiment of the invention;
Fig. 3 is an electrical schematic diagram of the present invention.
The method that the present invention utilizes thermistor to solve long-time overcurrent fail safe and alarm is (referring to Fig. 1; Fig. 2): in the casing 1 of protector; the side that semistor 5 next-door neighbours that the long-time overcurrent of carrying is generated heat press close to be installed in terne metal hot melt sheet 4; make the heat energy that produces on the thermistor 5 can conduct to this terne metal hot melt sheet 4; and when this terne metal hot melt sheet 4 reaches uniform temperature; make this hot melt sheet 4 produce plastic deformation; again under the effect of elastic force stage clip 2; the a line or the b line ground connection that make its grounding reed 6 displacements and allow outside line; simultaneously, in time connect warning circuit and send the audible and visual alarm signal.At this moment, operating personnel can find the guilty culprit in each loop rapidly according to the alarm indication, in time get rid of this fault, thus the safety of the assurance equipment and the person.
The material of the thermistor 5 of the positive temperature coefficient among the present invention can be high molecular, also can be ceramic.Terne metal hot melt sheet 4 wherein can be one, and as shown in Figure 1 and Figure 2, its next-door neighbour is installed in gas discharge tube 3 and PTC thermistor 5 in the middle of both; Also can be two, the next-door neighbour reclines and is installed in a side of gas discharge tube 3 and PTC thermistor 5 respectively.The plastic deformation temperatures of terne metal hot melt sheet 4 wherein can be selected the product of different temperatures parameter as required.
Structural representation and schematic perspective view referring to Fig. 1, one embodiment of the invention shown in Figure 2.It includes casing 1; stage clip 2; discharge tube 3; terne metal hot melt sheet 4; thermistor 5; wiring reed 6 and the sound and light alarm device of forming by light-emitting diode 8; parallel longitudinal is installed in proper order and is provided with two row by stage clip 2 in type casing 1; gas discharge tube 3; FS terne metal hot melt sheet 4 and the long-time overvoltage discharge unloading protecting mechanism that is positioned at that ground connection earial drainage reeds 9 with stage clip 2 interlocks in the middle of the two row elements constitute; wherein gas discharge tube 3 next-door neighbours are installed in a side of FS terne metal hot melt sheet 4; the inboard of casing 1 is installed on distribution reed 6; be installed on alarm indication light-emitting diode 8 on external handle 7 end faces of casing 1; the opposite side of the FS terne metal hot melt sheet 4 in casing 1 is close to the thermistor 5 of pressing close to be installed on positive temperature coefficient, makes the heat energy that produces on the thermistor 5 can conduct to terne metal hot melt sheet.
Introduce operation principle of the present invention below in conjunction with Fig. 3: when external cable (a, b line) when accident is touched power, illumination or electric car cable, can cause outside line to load the voltage that exchanges 160-220V or direct current 60-500V for the distributing frame protector according to what it touched apart from distance or different situations, because the effect of line resistance, the voltage when reaching device end have not reached required 190 volts-260 volts of discharge voltage.Like this, discharge tube FD-a, the FD-b on the protector also is failure to actuate, and born chance failure voltage for a long time and generated heat by PTC-a, PTC-b thermistor, and its resistance increases; This heat energy reaches terne metal hot melt sheet FS-a, the FS-b that installs by subsides with its next-door neighbour, when temperature reaches a certain numerical value (for example: 70 ℃), this hot melt sheet produces plastic deformation and melts, again under the elastic force effect of stage clip 2, make K switch-a, K-b action, connect ground wire E and earial drainage, alarm signal line S and ground wire E also constitute path simultaneously, its alarm device sends the audible and visual alarm signal, and alarm LED lamp is bright.FD is the R230 gas discharge tube among Fig. 3, and PTC is a positive temperature coefficient thermistor, and FS is 70 ℃ of leypewter hot melt sheets, and K is hot step switch, and LED is Φ 3 high brightness LEDs.
Another improvements of the present invention are that the handle end face with the protector casing outside makes inclined-plane (referring to Fig. 1) into by the plane, and when the alarm indicator of installation it on like this 8 was bright, the staff only need stand in frame one side just can in time find it, fixes a breakdown as early as possible.
Claims (5)
1; the implementation method of fail safe of protector thermistor and alarm; it is characterized in that: in the casing of protector; the semistor that the long-time overcurrent of carrying is generated heat is close to a side of pressing close to be installed in terne metal hot melt sheet; make the heat energy that produces on the thermistor can conduct to this terne metal hot melt sheet; and when this terne metal hot melt sheet reaches uniform temperature; make this hot melt sheet produce plastic deformation; again under the elastic force effect of stage clip; the a line or the b line ground connection that make its grounding reed displacement and allow outside line; simultaneously, in time connect warning circuit and send the audible and visual alarm signal.
2, the implementation method of protector thermistor as claimed in claim 1 fail safe and alarm, it is characterized in that: wherein the material of the thermistor of positive temperature coefficient can be high molecular, also can be ceramic.
3, the implementation method of protector thermistor as claimed in claim 1 fail safe and alarm, it is characterized in that: wherein terne metal hot melt sheet can be one, the next-door neighbour is installed in the middle of gas discharge tube and the PTC thermistor; Also can be two, the next-door neighbour reclines and is installed in a side of gas discharge tube and PTC thermistor respectively.
4, the implementation method of protector thermistor as claimed in claim 1 fail safe and alarm, it is characterized in that: wherein the plastic deformation temperatures of heat fusing can be selected the product of different temperatures parameter as required.
5; the device of fail safe of a kind of protector thermistor and alarm; include casing; stage clip; discharge tube; terne metal hot melt sheet; thermistor; wiring reed and the sound and light alarm device of forming by light-emitting diode; parallel longitudinal is installed in proper order and is provided with two row by stage clip in type casing; gas discharge tube; FS terne metal hot melt sheet and the long-time overvoltage discharge unloading protecting mechanism that is positioned at that the ground connection earial drainage reed with the stage clip interlock in the middle of the two row elements constitutes; wherein the gas discharge tube next-door neighbour is installed in a side of fail safe terne metal hot melt sheet; the inboard of casing is installed on the distribution reed; be installed on alarm indication light-emitting diode on the external handle end face of casing; it is characterized in that: the opposite side of the FS terne metal hot melt sheet in casing is close to the thermistor of pressing close to be installed on positive temperature coefficient, makes the heat energy that produces on the thermistor can conduct to terne metal hot melt sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98108505A CN1049075C (en) | 1998-05-15 | 1998-05-15 | Realizing method and device for protecting and warning when resistance of security device losing efficacy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98108505A CN1049075C (en) | 1998-05-15 | 1998-05-15 | Realizing method and device for protecting and warning when resistance of security device losing efficacy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1197277A true CN1197277A (en) | 1998-10-28 |
| CN1049075C CN1049075C (en) | 2000-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98108505A Expired - Fee Related CN1049075C (en) | 1998-05-15 | 1998-05-15 | Realizing method and device for protecting and warning when resistance of security device losing efficacy |
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| Country | Link |
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| CN (1) | CN1049075C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463323C (en) * | 2004-12-09 | 2009-02-18 | 鸿富锦精密工业（深圳）有限公司 | Temp. safety apparatus |
| CN104655314A (en) * | 2015-03-23 | 2015-05-27 | 国家电网公司 | Electrical equipment connector lead temperature measuring device prepared by adopting fusible alloy |
| CN104949772A (en) * | 2015-06-19 | 2015-09-30 | 北京安仁和创科技发展有限公司 | Temperature sensor and power socket adopting temperature sensor |
| CN108151891A (en) * | 2017-12-22 | 2018-06-12 | 谢涛 | Trigger system in a kind of equipment alarm internet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2185481Y (en) * | 1994-01-15 | 1994-12-14 | 苏州市集成科技实业有限公司 | DC solid relay with overcurrent protection |
| CN1164770A (en) * | 1996-05-02 | 1997-11-12 | 刘卫方 | Temp. controlled power-off protective and alarm circuit |
-
1998
- 1998-05-15 CN CN98108505A patent/CN1049075C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463323C (en) * | 2004-12-09 | 2009-02-18 | 鸿富锦精密工业（深圳）有限公司 | Temp. safety apparatus |
| CN104655314A (en) * | 2015-03-23 | 2015-05-27 | 国家电网公司 | Electrical equipment connector lead temperature measuring device prepared by adopting fusible alloy |
| CN104655314B (en) * | 2015-03-23 | 2017-05-24 | 国家电网公司 | Electrical equipment connector lead temperature measuring device prepared by adopting fusible alloy |
| CN104949772A (en) * | 2015-06-19 | 2015-09-30 | 北京安仁和创科技发展有限公司 | Temperature sensor and power socket adopting temperature sensor |
| CN104949772B (en) * | 2015-06-19 | 2017-12-05 | 北京安仁和创科技发展有限公司 | A kind of power outlet of temperature sensor and the application temperature sensor |
| CN108151891A (en) * | 2017-12-22 | 2018-06-12 | 谢涛 | Trigger system in a kind of equipment alarm internet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049075C (en) | 2000-02-02 |
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