CN201522342U - Passive audible and visual alarm temperature indicating device - Google Patents
Passive audible and visual alarm temperature indicating device Download PDFInfo
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- CN201522342U CN201522342U CN2009202223386U CN200920222338U CN201522342U CN 201522342 U CN201522342 U CN 201522342U CN 2009202223386 U CN2009202223386 U CN 2009202223386U CN 200920222338 U CN200920222338 U CN 200920222338U CN 201522342 U CN201522342 U CN 201522342U
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- current transformer
- indicating device
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Abstract
The utility model relates to a passive audible and visual alarm temperature indicating device which is used for monitoring the temperature at an electrical connector among power supply unit parts of a power system and consists of an inductive power supply, a voltage stabilizing part, a temperature measuring part, an aduible alarm system and a light emitting display part. The passive audible and visual alarm temperature indicating device has the advantage that an external power supply is not needed, so that the device can be guaranteed to be used for a long time without maintenance. When the phenomenon that connection points of electrical equipment overheat occurs, audible and visual alarm is sent out. The passive audible and visual alarm temperature indicating device has high temperature measurement accuracy, good safety, and obvious effect due to the combined action of audible prompt and light emitting prompt day or night. Compared with a disposable temperature indicating wax sheet, the temperature indicating device can also be used repeatedly, with long service life and extremely low power consumption. Even a temperature measuring element is burnt as the temperature at contact points increases abruptly, the temperature indicating device can be all right only by replacing temperature detecting element with a new one. The use is convenient, as the temperature of a heating part to be measured can be measured only by adhering the temperature detecting element to the heating part to be detected.
Description
Technical field
The utility model is a kind of device that is used to monitor electric connecting point place temperature between the power system power supply part of appliance, particularly relates to a kind of passive audible and visual alarm temperature indicating device.
Background technology
In electric system, overheated phenomenon can often take place because of loose contact in the tie point between each power-supply unit parts (simple for narration, as to be called for short tie point), in time finds to handle if temperature surpasses allowed band and fails, may damage power-supply unit, and cause security incident.Because the high risk of High voltage power supply equipment, the patrolman can not be near not touching again, and instrument can't be installed again in some position, and whether the tie point that therefore adopts way intuitively to observe this kind equipment has superheating phenomenon is a difficult problem always.
The means of observing electrical equipment tie point superheating phenomenon at present mainly contain sheetlike temperature indicator (being also referred to as temperature-indicating wax label) and temperature measurer etc.Wherein " sheetlike temperature indicator " is a kind of efficient ways." sheetlike temperature indicator " is electrical operation equipment " heating monitor ".Therefore, electric industry rules regulation: before important electrical equipment such as transformer uses, must stick on " temperature-indicating wax label " on each electrical equipment tie point, check the undue rising of in time finding temperature in the tour, the up-set condition of electrical operation equipment is done corresponding suitable the processing to make things convenient for the person on duty.
The sheetlike temperature indicator product of public offering in the market, its shape is a disc, and lower surface (bottom) is a disk, and upper surface (top) is an arc surface, and sheetlike temperature indicator divides shades of colours such as redness, yellow, represents different melt temperatures.During use, earlier coat " all ten woodss " stick of etc.ing in the disk bottom of sheetlike temperature indicator, sheetlike temperature indicator is adhered on the tie point of the electrical equipment that will observe again, if when the tie point temperature surpasses rated temperature, sheetlike temperature indicator promptly melts voluntarily, represents to warn." sheetlike temperature indicator " has heating and reflects reliable, directly perceived, expense characteristics cheap, easy to use, its weak point is: in the practical operation, because the vibrations that the load variations of equipment or electric switch close a floodgate often cause coming off of sheetlike temperature indicator, again subsidize sheetlike temperature indicator, must can carry out after the equipment power failure again, influence the normal operation of electrical equipment; Do not subsidize sheetlike temperature indicator, the abnormal conditions of discovering device heating in time cause heavy economic losses when serious again.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of passive audible and visual alarm temperature indicating device.
A kind of passive audible and visual alarm temperature indicating device, by induction power supply and voltage stabilizing part, the detected temperatures part, audible alarm system and luminous displaing part are grouped into;
Described induction power supply and voltage stabilizing part are made up of current transformer, rectifier bridge, stabilivolt and filter capacitor;
Induction power supply is to be made of current transformer TA, and its mains side is the power transmission line of a certain side of electric connecting point between the power system power supply part of appliance;
The rectifier bridge that 4 diodes are formed constitutes full-wave rectifying circuits, and 4 diodes series connection backs constitute stabilivolt and are connected the two ends of output terminal of full-wave rectifying circuit and in parallel with electric capacity;
Described detected temperatures part is made up of thermistor.Thermistor connects the current-limiting resistance and the light emitting diode of series connection; The other end of thermistor, light emitting diode connects the two ends of the output terminal of full-wave rectifying circuit respectively; Thermistor is connected the output terminal of music integrated circuit with the current-limiting resistance junction;
Described audible alarm system and luminous displaing part branch are made up of music integrated circuit and light emitting diode.
The power lead of music integrated circuit connects the two ends of the output terminal of full-wave rectifying circuit respectively;
Be connected to the end of output terminal of full-wave rectifying circuit and the output terminal of music integrated circuit after anti-interference resistance, the anti-interference capacitor parallel connection.
Piezoelectric buzzer connects the output terminal of music integrated circuit.
Compare with existing sheetlike temperature indicator, the utility model temperature indicating device biggest advantage is:
1, do not need independent additional power source, like this can assurance device long-time use and do not need safeguard.
2, when superheating phenomenon appears in the electrical equipment tie point, provide sound and light alarm.Thermometric accuracy height, security is good, no matter daytime or night, sound prompting and luminous prompting acting in conjunction, effect is obvious.
3, for the disposable use of temperature-indicating wax label, this temperature indicating device can also be reused, and the life-span is long, and power consumption is extremely low.Burnt temperature element even unexpected contact point temperature raises suddenly, only needed to change a new temperature element and get final product.
4, easy to use, only need temperature element is pasted the heating position that needs detection, just can detect its temperature.
Description of drawings
Fig. 1 is the passive audible and visual alarm temperature indicating device circuit diagram;
Fig. 2 installs wiring schematic diagram for passive audible and visual alarm temperature indicating device in electric system;
Fig. 3 is the passive audible and visual alarm temperature indicating device structural representation.
Below in conjunction with drawings and Examples the utility model temperature indicating device is described further.
Embodiment
Embodiment 1:
The utility model temperature indicating device circuit diagram as shown in Figure 1.
The utility model power supply is to be made of current transformer TA, and its mains side is the power transmission line of a certain side of electric connecting point between the power system power supply part of appliance.When having electric current to flow through in the power transmission line, the TA secondary side produces induction current.This induction current is output as Rectified alternating current through the full-wave rectifying circuit that diode V1, V2, V3 and V4 form, and the C1 capacitor filtering is passed through in the series circuit voltage stabilizing that the V5 that then flows through, V6, V7 and V8 form again, obtains the DC voltage about about 3V.This voltage provides power supply for detected temperatures part and sound warning system and luminous displaing part branch.
The test section is made of thermistor R2.When the tie point temperature overheating, surpass the critical flex point of thermistor R2, the R2 resistance greatly descends, LED is lighted warning, points out overheated generation, simultaneously, the N point voltage rises, and triggers music integrated circuit IC work, by HTD piezoelectric buzzer sounding alarm.
R1, C2 form anti-jamming circuit, thereby prevent that electromagnetic interference (EMI) from causing false triggering to make music integrated circuit IC miss the sound that makes sound.The effect of R3 is the LED current-limiting resistance.
In the circuit, V1-V8 can select common commutation diode IN4001; C1 is common electrical electrolysis condenser 2200uF/16V; HTD is common piezoelectric buzzer; Music integrated circuit IC selects rated voltage 3V, and operating voltage range is at the IC of 2V in the 5V, and music integrated circuit IC sounding content can be selected by demand.
R1 selects 1/8W, 100K Ω resistance; R3 selects 1/8W, 50 Ω resistance; C2 selects the 0.01uF ceramic disc capacitor.
The selection of thermistor R2 can be different and different to the requirement of overtemperature point according to the scene.
The transformation ratio selection of current transformer TA first side winding and secondary side winding is with under the normal load duty, and the secondary side winding working current is approximately 50mA and is advisable.Like this, the about 250mW of entire equipment consumed power in operate as normal, power consumption is very little, so the core dimensions of current transformer TA is also little.
Embodiment 2:
The utility model temperature indicating device is installed wiring schematic diagram in electric system as shown in Figure 2.
Current transformer TA iron core adopts ellipse iron core (also can adopt the annular core of other shapes), and primary side passes iron core, and second siding ring is (detailed structure is with reference to figure 3) on iron core.
Temperature detecting resistance R2 pastes on the tie point that need to detect, require R2 with extraneous to have good electrical isolation and sealing and and the tie point surface of contact good heat passage will be arranged.Connect by being connected lead between R2 and circuit M, the N point.Connecting line will be fixed on the power transmission line at last between current transformer TA iron core and R2 and circuit M, the N point, with the anti-rock connecting line that fractures.
Embodiment 3:
The utility model temperature indicating device structural representation as shown in Figure 3.
In the drawings, 1 is the iron core of current transformer TA, 2 is fastening bolt, and 3 is the can body, and 4 for being wrapped in the secondary side winding on the current transformer TA iron core, 5 is M in Fig. 1 circuit, N contact binding post, 6 is the circuit board of Fig. 1 circuit, and 7 is the alarm lamp diode, and 8 are the warning piezoelectric buzzer, 9 is the power transmission line of a certain side of electric connecting point between the power system power supply part of appliance, just the first side winding of current transformer TA.
The iron core 1 of 2 semicircle current transformer TA is fixedly connected by fastening bolt 2; Pass through power transmission line 9 in the center of circle of the iron core 1 of current transformer TA; Can body 4 connects the bottom of the iron core 1 of 1 semicircle current transformer TA; Secondary side winding 4 is wrapped on the current transformer TA iron core 1; Circuit board 6 is fixed in the can body 3; M, N contact binding post 5, warning piezoelectric buzzer 8 and alarm lamp diode 7 are installed on the can body 3.
Circuit board 6 and secondary side winding and part iron core are sealed with the waterproof moisture proof, and the position of the LED that exposes is the easiest observed position, and the piezoelectric buzzer HTD vocal hole that exposes is also noted that waterproof problem.M, the N wiring point binding post 5 in addition that expose in addition.
The iron core 1 of current transformer TA be divided into up and down the purpose of two halves be for the scene easy for installation.Open fastening bolt 2, power transmission line 9 is put into iron core, tighten fastening bolt 2 then, make the iron core 1 of current transformer TA become very little iron core-closed of complete air gap.
The mode of the upper and lower two halves closure of the iron core of current transformer TA can be the use screw shown in the above figure tight and, also can adopt other mode tight and, such as the tight and mode of similar clamp on amperemeter iron core.
In addition, except the air gap position of current transformer TA iron core, remainder all should have good electrical isolation capabilities, so that make the power transmission line of current transformer TA iron core and one side that good electrical isolation be arranged.
Claims (3)
1. passive audible and visual alarm temperature indicating device is characterized in that: by induction power supply and voltage stabilizing part, and the detected temperatures part, audible alarm system and luminous displaing part are grouped into;
Described induction power supply and voltage stabilizing part are made up of current transformer, rectifier bridge, stabilivolt and filter capacitor;
Induction power supply is to be made of current transformer TA, and its mains side is the power transmission line of a certain side of electric connecting point between the power system power supply part of appliance;
The rectifier bridge that 4 diodes are formed constitutes full-wave rectifying circuits, and 4 diodes series connection backs constitute stabilivolt and are connected the two ends of output terminal of full-wave rectifying circuit and in parallel with electric capacity;
Described detected temperatures part is made up of thermistor; Thermistor connects the current-limiting resistance and the light emitting diode of series connection; The other end of thermistor, light emitting diode connects the two ends of the output terminal of full-wave rectifying circuit respectively; Thermistor is connected the output terminal of music integrated circuit with the current-limiting resistance junction;
Described audible alarm system and luminous displaing part branch are made up of music integrated circuit and light emitting diode;
The power lead of music integrated circuit connects the two ends of the output terminal of full-wave rectifying circuit respectively;
Be connected to the end of output terminal of full-wave rectifying circuit and the output terminal of music integrated circuit after anti-interference resistance, the anti-interference capacitor parallel connection.
2. current transformer according to claim 1, the iron core that it is characterized in that current transformer TA is made up of two halves up and down, the transformation ratio selection of current transformer TA first side winding and secondary side winding is with under the normal load duty, and the secondary side winding working current is 50mA; Piezoelectric buzzer connects the output terminal of music integrated circuit.
3. current transformer according to claim 1 and 2 is characterized in that:
The iron core of 2 semicircle current transformer TA is fixedly connected by fastening bolt; Pass through power transmission line in the center of circle of the iron core of current transformer TA; The can body connects the bottom of the iron core of 1 semicircle current transformer TA; Secondary side winding is wrapped on the current transformer TA iron core; Circuit board is fixed in the can body; M, N contact binding post, warning piezoelectric buzzer and alarm lamp diode are installed on the can body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202223386U CN201522342U (en) | 2009-09-02 | 2009-09-02 | Passive audible and visual alarm temperature indicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202223386U CN201522342U (en) | 2009-09-02 | 2009-09-02 | Passive audible and visual alarm temperature indicating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201522342U true CN201522342U (en) | 2010-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202223386U Expired - Fee Related CN201522342U (en) | 2009-09-02 | 2009-09-02 | Passive audible and visual alarm temperature indicating device |
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| Country | Link |
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| CN (1) | CN201522342U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170122813A1 (en) * | 2015-11-02 | 2017-05-04 | Tyco Electronics Corporation | Temperature monitoring systems and methods for electrical power distribution systems |
| CN107731631A (en) * | 2017-11-27 | 2018-02-23 | 中山路得斯空调有限公司 | A kind of air-break with operating current instruction |
-
2009
- 2009-09-02 CN CN2009202223386U patent/CN201522342U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170122813A1 (en) * | 2015-11-02 | 2017-05-04 | Tyco Electronics Corporation | Temperature monitoring systems and methods for electrical power distribution systems |
| US10024724B2 (en) * | 2015-11-02 | 2018-07-17 | Te Connectivity Corporation | Temperature monitoring systems and methods for electrical power distribution systems |
| CN107731631A (en) * | 2017-11-27 | 2018-02-23 | 中山路得斯空调有限公司 | A kind of air-break with operating current instruction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20120902 |