CN2265017Y - Self-powered current overtemperature alarm - Google Patents
Self-powered current overtemperature alarm Download PDFInfo
- Publication number
- CN2265017Y CN2265017Y CN 96215379 CN96215379U CN2265017Y CN 2265017 Y CN2265017 Y CN 2265017Y CN 96215379 CN96215379 CN 96215379 CN 96215379 U CN96215379 U CN 96215379U CN 2265017 Y CN2265017 Y CN 2265017Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- self
- electric current
- box body
- idiostatic
- 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 self-powered current overtemperature alarm. A magnetic transforming power circuit is composed of a current mutual inductor LB watched with a voltage-stabilizing diode and a rectifier diode so as to supply power for a whole machine, and the output end of the magnetic transforming power circuit is connected with bridge rectifier circuits. A direct-current voltage-stabilizing circuit is composed of bridge rectifier circuits D< 3 >-D< 6 > and an integrated circuit 7806, and the output end of the direct-current voltage-stabilizing circuit is connected with a temperature controller which is composed of temperature relays TJ < 1 >, TJ < 2 > and is arranged on an object to be measured, and a leading wire of the output end of the temperature controller is connected with an audible and visual alarm unit, and the whole machine is sheathed on a bus. The utility model has the advantages of safe use, convenient installation, long service life, etc.
Description
The utility model relates to a kind of idiostatic self-supply power source electric current overheat alarm, belongs to the protection equipment of switch bus in the electric power system.
At present, in electric power system, because the thermal effect of electric current causes the switch bus overheated, destruction equipment, having an accident causes damage happens occasionally, and people thirst for having the electric current temperature alarm to occur for this reason, still find no the pass reported in literature by retrieval.
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art and provides a kind of alarm directly to be sleeved on the bus, device does not need external power supply, change power supply as the complete machine power supply by magnetic variation, the equipotential design, has sound and light of alarm, idiostatic self-supply power source electric current overheat alarm easy for installation.
The purpose of this utility model is achieved in that it by box body, and circuit board constitutes, and the circuit board that is welded with circuit is loaded in the box body, and its structural feature is, by current transformer LB, and voltage-stabiliser tube WD
1, WD
2, rectifier diode D
1, D
2Constitute magnetic variation and change power circuit, its output is connected with direct current regulation circuit; By bridge rectifier D
3-D
6, integrated circuit T
1, capacitor C
1, C
2, resistance R
1, indicator light FD
1Constitute direct current regulation circuit, its output is connected with thermostat.By temperature relay TJ
1, TJ
2, constitute thermostat and place on the measured object its output lead-in wire extremely to warn the unit to be connected with acousto-optic.Acousto-optic warning unit is by light-emitting diode FD
2, resistance R
2, integrated circuit block T
2, the news Chinese percussion instrument constitutes.Described alarm is sleeved on the bus.
The purpose of this utility model can also reach by following technical measures: magnetic variation changes the voltage stabilizing didoe WD of power supply
1With rectifier diode D
1Be in series voltage stabilizing didoe WD
2With rectifier diode D
2Contact mutually, on two series circuits were connected in parallel in the loop, with current transformer LB, bridge rectifier was connected respectively.Capacitor C in the bridge rectifier
1Output integrated package T with rectification circuit
1Input be connected capacitor C
2With integrated package T
1Output link to each other resistance R
1With indicator light FD
1Be in series and integrated package T
1Be connected.Thermostat is by sealed type temperature relay TJ
1, TJ
2Form TJ
1With TJ
2Be in parallel.The news Chinese percussion instrument Y of photoelectric alarm unit and integrated circuit block T
2Be connected.Box body can be that rectangle also can be semicircle box body according to the specification of bus.
The utlity model has following advantage compared to existing technology:
1, this device adopts the power supply of current field converting power source, has and follows the live monitoring function for a long time.
2, have automatic monitoring overtemperature alarm function: monitored electric equipment is when surpassing the design temperature of this device, and this device gets final product automatic sounding, luminous warning;
3, without additional power source: this device comes work by the current field in the detected environment, therefore, does not need external power supply, as long as the measured point has electric current to pass through, this device can be implemented monitoring function;
4, applied widely: as to go for the various different voltages tier environment, be suitable for voltage range between 10V-35KV;
5, simple installation: need not to change the structure of shape, only need to use special jig to be stuck on switch or the bus and get final product;
6, safe and reliable: safe and reliable, in normal detection range, can not cause any harm to monitored equipment, misoperation can not take place, the operator on duty needn't can grasp the apparatus overheat situation near monitored equipment;
7, alarm temperature can be made according to user's needs, and temperature range is at 50-140 degree centigrade, and error is at ± 5 degrees centigrade.
8, maintenance is little: once installation, ordinary circumstance need not safeguarded.
9, long service life: normal use can reach 10 years.
The explanation of accompanying drawing drawing:
Fig. 1 is the utility model electrical schematic diagram.
Fig. 2 is a rectangle box body structure schematic diagram of the present utility model.
Fig. 3 is a semicircle box body structure schematic diagram of the present utility model.
Fig. 4 is a scheme of installation of the present utility model.
Embodiment describes the utility model in detail below in conjunction with accompanying drawing.
The utility model is by box body, and the circuit board two large divisions forms.Box body can be according to the specifications design of bus, and Fig. 2, Fig. 3 are the utility model box body structure embodiment.Fig. 2 is the rectangle box body, is applicable to that the cross section is that rectangular bus uses.Fig. 3 is half garden shape box body, is applicable to that the cross section is that circular bus uses the box body one-time cast-forming.(1) is power supply indicator FD among two figure
1, (2) are alarm lamp FD
2, (3) are news Chinese percussion instrument Y.Circuit of the present utility model is made up of four parts, and promptly magnetic variation changes power circuit, direct current regulation circuit, thermostat, acousto-optic warning unit.Its magnetic variation changes power circuit by instrument transformer LB, voltage stabilizing didoe WD
1, WD
2, rectification second tube sheet D
1, D
2Form voltage stabilizing didoe WD
1With rectifier diode D
1Be in series voltage stabilizing didoe WD
2With rectifier diode D
2Be in series, two series circuits are formed positive and negative half-wave clipping circuit, are connected in parallel on the loop, are connected with current transformer LB, bridge rectifier respectively.Current transformer LB is connected on the loop, the iron core of current transformer LB is made by banding pattern selenium steel disc, interlayer is added with insulating barrier, the effect that magnetic variation changes power circuit is that the positive and negative half-wave of alternating voltage that will suddenly change is limited in the safe voltage scope, ceiling voltage is supplied with the next stage voltage stabilizing circuit and is used between 17-20V.The output that magnetic variation changes power circuit is connected with the bridge circuit of direct current regulation circuit.Direct current regulation circuit is by bridge rectifier, capacitor C
1, C
2, integrated circuit block T
1, resistance R
1, light-emitting diode FD
1Form, wherein bridge rectifier is by diode D
3, D
4, D
5, D
6Form, an end and the magnetic variation of bridge rectifier change power circuit and link to each other, the other end and integrated circuit block T
1Be connected integrated circuit block T
1For three-terminal voltage-stabilizing integrated component the utility model adopts 7806, capacitor C
1, C
2Adopt filter capacitor, capacitor C
1With the output of bridge rectifier, integrated package T
1Input be connected capacitor C
2With the output of bridge rectifier, integrated package T
1Output be connected resistance R
1With light-emitting diode FD
1Contact mutually, with integrated circuit block T
1Be connected.The effect of this circuit is that magnetic variation is changed the alternating voltage of power circuit supply through bridge rectifier D
3-D
6Full-wave rectification becomes unsettled direct voltage 6V-18V, through integrated package T
1The arrangement voltage stabilizing is exported at the 6V direct current, and indicator light FD is arranged
1Glittering.The output of direct current regulation circuit is connected with thermostat.Thermostat is by temperature relay TJ
1, TJ
2Form.Temperature relay TJ
1, TJ
2Form.Temperature relay TJ
1With TJ
2Be in parallel, place that the effect of thermostat is on the testee, detect bus temperature.Its output lead-in wire and the integrated circuit block T of acousto-optic warning unit
2Be connected.Acousto-optic warning unit is by resistance R
2, light-emitting diode FD
2, integrated circuit block T
2, news Chinese percussion instrument Y forms, wherein resistance R
2With light-emitting diode FD
2Be in series, with integrated circuit block T
2Be in series integrated circuit block T
2For integrated circuit oscillator is a buzzing warning dedicated block, its other end is connected with news Chinese percussion instrument Y.The effect of this circuit is thermostat drive integrated circult oscillator T
2Make news Chinese percussion instrument Y send the sound, simultaneously indicator light FD
2The above-described circuit of glittering warning all is welded on the circuit board except that thermostat, and circuit board is contained in the box body.Box body is sleeved on the bus (4).Fig. 4 is a mounting structure schematic diagram of the present utility model.Box body (5) is sleeved on the bus (4) by jig (6), and thermostat (8) is installed on the measured object, and measured object of the present utility model is oil-minimum breaker (9).Lead-in wire of thermostat (7) and the interior integrated circuit block T of box body
2Be connected.
Operation principle of the present utility model is: the alarm suit is connected on the bus, the probe of thermostat is contained on the institute monitoring point.When bus has electric current, current field cutting iron core produces magnetic flux, and the magnetic flux cutting produces electromotive force around the coil on the iron core, the generation that iron core can overcome eddy current can be resisted the impact of big capacity short circuit current electromagnetic force, converts current field to the alternating voltage supply circuit and uses.Because the voltage that magnetic variation changes is proportional to electric current and produces, voltage raises when electric power system is short-circuited, for guaranteeing subordinate's operate as normal, voltage-stabiliser tube WD
1, WD
2With rectifier diode D
1, D
2The positive and negative half-wave clipping circuit of forming is limited in the positive and negative half-wave of alternating voltage that suddenlys change in the safe voltage scope, and the ceiling voltage after magnetic variation changes the power supply processing is supplied with direct current regulation circuit between 17-20V.Alternating voltage after being handled by clipping circuit is through rectifier diode D
3-D
6Full-wave rectification becomes unstable direct current 6V-18V, again through integrated package T
1Voltage stabilizing is at the output of 6V direct current, indicator light (light-emitting diode) FD simultaneously
1Glittering indication.When monitored some temperature rises to institute when observing and predicting alert temperature, thermostat action TJ
1, TJ
2The normal opened contact closure, drive integrated circult oscillator T
2Vibration makes news Chinese percussion instrument Y send the sound, simultaneously alarm lamp FD
2Glittering, after temperature descends, thermostat TJ automatic backspace sounding all clear police.
Claims (6)
1, a kind of idiostatic self-supply power source electric current overheat alarm is made of box body, circuit board, and the circuit board that is welded with circuit is loaded in the box body, it is characterized in that:
A, by current transformer LB, voltage stabilizing didoe WD
1, WD
2, rectifier diode D
1, D
2Constitute magnetic variation and change power circuit, its output is connected with direct current regulation circuit;
B, by bridge rectifier D
3-D
6, integrated circuit T
1, capacitor C
1, C
2, resistance R
1, indicator light FD
1Constitute direct current regulation circuit, its output is connected with thermostat;
C, by temperature relay TJ
1, TJ
2, constitute thermostat and place on the measured object its output lead-in wire to warn the unit to be connected with the acousto-optic plate;
D, acousto-optic warning unit are by light-emitting diode FD
2, resistance R
2, integrated circuit block T
2, the news Chinese percussion instrument constitutes;
E, described alarm are sleeved on the bus.
2, idiostatic self-supply power source electric current overheat alarm according to claim 1 is characterized in that magnetic variation changes the voltage stabilizing didoe WD of power supply
1With rectifier diode D
1Be in series voltage stabilizing didoe WD
2With rectifier diode D
2Contact mutually, two series circuits are connected in parallel on the loop, and with current transformer LB, bridge rectifier is connected respectively.
3, electric current overheat alarm according to claim 1, the capacitor C in the bridge rectifier
1Output integrated package T with rectification circuit
1Input be connected capacitor C
2With integrated package T
1Output link to each other resistance R
1With indicator light FD
1Be in series and integrated package T
1Be connected.
4, idiostatic self-supply power source electric current overheat alarm according to claim 1 is characterized in that described thermostat is by sealed type temperature relay TJ
1, TJ
2Form TJ
1With TJ
2Be in parallel.
5, idiostatic self-supply power source electric current overheat alarm according to claim 1 is characterized in that the news Chinese percussion instrument Y and the integrated circuit block T of acousto-optic warning unit
2Be connected.
6, idiostatic self-supply power source electric current overheat alarm according to claim 1, described box body can be that rectangle also can be semicircle box body according to the specification of bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96215379 CN2265017Y (en) | 1996-07-10 | 1996-07-10 | Self-powered current overtemperature alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96215379 CN2265017Y (en) | 1996-07-10 | 1996-07-10 | Self-powered current overtemperature alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2265017Y true CN2265017Y (en) | 1997-10-15 |
Family
ID=33897187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96215379 Expired - Fee Related CN2265017Y (en) | 1996-07-10 | 1996-07-10 | Self-powered current overtemperature alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2265017Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639385B (en) * | 2009-09-02 | 2011-09-07 | 北京交通大学 | Passive audible and visual alarm temperature indicating device |
| CN112781738A (en) * | 2020-12-30 | 2021-05-11 | 北京利德华福电气技术有限公司 | Detection circuit for temperature of transformer winding |
-
1996
- 1996-07-10 CN CN 96215379 patent/CN2265017Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639385B (en) * | 2009-09-02 | 2011-09-07 | 北京交通大学 | Passive audible and visual alarm temperature indicating device |
| CN112781738A (en) * | 2020-12-30 | 2021-05-11 | 北京利德华福电气技术有限公司 | Detection circuit for temperature of transformer winding |
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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 |