CN204116521U - Leakage alarm - Google Patents
Leakage alarm Download PDFInfo
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- CN204116521U CN204116521U CN201420596435.2U CN201420596435U CN204116521U CN 204116521 U CN204116521 U CN 204116521U CN 201420596435 U CN201420596435 U CN 201420596435U CN 204116521 U CN204116521 U CN 204116521U
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- 238000005859 coupling reaction Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 5
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- 238000001914 filtration Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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- 238000009434 installation Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
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- 230000001755 vocal effect Effects 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a kind of leakage alarm, belong to power engineering field.Described leakage alarm comprises: insulation crust (1), be built in the voltage detecting circuit (2) in described insulation crust (1), be placed on the test rapier (3) of described insulation crust (1), ground connection rapier (4), power-line plug (5), power switch (K) and loudspeaker (BL); Wherein, described test rapier (3), described ground connection rapier (4), described power-line plug (5), described power switch (K) are all connected with described voltage detecting circuit (2) with described loudspeaker (BL).The utility model achieves and carries out leakage-current alarm when electrical equipment leaks electricity, and achieves in time and leakage-current alarm comparatively accurately, leak current fault is processed in time, substantially increases the security of operation.
Description
Technical field
The present invention relates to power engineering field, particularly a kind of leakage alarm.
Background technology
In power engineering field, the leaky of electrical equipment can cause the electric shock casualty accident of staff, therefore, needs the metal shell of electrical equipment to connect zero connection protection line, thus when metal shell leaks electricity, leakage current is introduced the earth, prevent electric leakage.And for the electrical equipment operated under outdoor field extreme environment, the impact by weather can make zero connection protection line or metal shell produce corrosion, cause electrical equipment zero connection protection line and the disconnected of metal shell to take off, creepage protection function was lost efficacy.
In the prior art, in order to prevent occurring electric leakage accident in these cases, staff, before contact electrical equipment metal shell, adopts test pencil to measure metal shell usually, judge that whether metal shell is charged by whether the neon bulb on test pencil is shinny, thus avoid electric leakage accident.
Realizing in process of the present invention, inventor finds that correlation technique at least exists following problem:
Owing to metal shell scribbling one deck paint, and this paint is insulation, therefore, when adopting test pencil to measure metal shell, and may cause cannot Timeliness coverage leaky due to the obstruct of paint; Further, at moist rainy weather and under using nonstandard situation, use test pencil also possibly cannot Timeliness coverage leaky, thus cause electric shock accidents.
Summary of the invention
In order to solve the problem of correlation technique, embodiments provide a kind of leakage alarm.Described technical scheme is as follows:
Provide a kind of leakage alarm, described leakage alarm comprises:
Insulation crust (1),
Be built in the voltage detecting circuit (2) in described insulation crust (1),
Be placed on the test rapier (3) of described insulation crust (1), ground connection rapier (4), power-line plug (5), power switch (K) and loudspeaker (BL);
Wherein, described test rapier (3), described ground connection rapier (4), described power-line plug (5), described power switch (K) are all connected with described voltage detecting circuit (2) with described loudspeaker (BL).
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By the electrical leakage voltage of test rapier (3) the detection electrical equipment in leakage alarm, and by the voltage transmission that detects to voltage detecting circuit (2), loudspeaker (BL) is driven to send alarm voice to make voltage detecting circuit (2), achieve and carry out leakage-current alarm when electrical equipment leaks electricity, achieve in time and comparatively accurately leakage-current alarm, leak current fault is processed in time, substantially increases the security of operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of leakage alarm that one embodiment of the invention provides;
Fig. 2 is the circuit diagram of a kind of leakage alarm that another embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Fig. 1 is the structural representation of a kind of leakage alarm that one embodiment of the invention provides, and see Fig. 1, this leakage alarm comprises:
Insulation crust (1), be built in the voltage detecting circuit (2) in this insulation crust (1), be placed on the test rapier (3) of this insulation crust (1), ground connection rapier (4), power-line plug (5), power switch (K) and loudspeaker (BL); Wherein, test rapier (3), ground connection rapier (4), power-line plug (5), power switch (K) are all connected with voltage detecting circuit (2) with loudspeaker (BL).
During concrete enforcement, voltage detecting circuit (2) is circuit board, power switch (K) and loudspeaker (BL) are welded on circuit board, this circuit board is packaged in insulation crust (1), the vocal hole of loudspeaker (BL) and the installation embedded hole of power switch (K) are left in this insulation crust (1) front, this insulation crust (1) two side installation testing rapier (3) and ground connection rapier (4), meanwhile, power-line plug (5) is also equipped with in one of them side of this insulation crust (1).
Particularly, this leakage alarm is installed on electrical equipment metal shell.
Alternatively, voltage detecting circuit (2), comprising:
Current limliting divider resistance (R1), current limliting divider resistance (R2), current limliting divider resistance (R3), coupling capacitance (C1), triode (VT1), triode (VT2), voice module (IC1), filter capacitor (C2), filter capacitor (C3), voltage stabilizer (IC2), commutation diode (D1), commutation diode (D2), commutation diode (D3), commutation diode (D4), transformer (T).
Alternatively, insulation crust (1) is plastic casing.
Alternatively, test rapier (3), ground connection rapier (4) are the conductive metal sheet that thickness is 2 millimeters.
Alternatively, power-line plug (5) comprises power firestreak (L) and zero-power line (N), and this power firestreak and this zero-power line are the wire that sectional area is 1.5 square millimeters, and this wire comprises multiply flexible circuit conductor.
Alternatively, power switch (K) is small-sized toggle switch.
Alternatively, loudspeaker (BL) is Microspeaker.
Alternatively, current limliting divider resistance (R1), current limliting divider resistance (R2) and current limliting divider resistance (R3) are the resistance of 470 kilo-ohms; Coupling capacitance (C1) is the electric capacity of 1000 pico farads, and filter capacitor (C2) is the electric capacity of 100 microfarads, and filter capacitor (C3) is the electric capacity of 470 microfarads; Triode (VT1) is 9014 type triodes, and triode (VT2) is 9013 type triodes; Commutation diode (D1), commutation diode (D2), commutation diode (D3) and commutation diode (D4) are IN4148 type diode.
Alternatively, voice module (IC1) is ISD sequence of speech module; Voltage stabilizer (IC2) is 7806 type voltage stabilizers; Transformer (T) is 220 volts of wattage transformers turning 12 volts.
Above-mentioned all alternatives, all can form optional embodiment of the present invention according to combining arbitrarily, this is no longer going to repeat them.
The leakage alarm that the embodiment of the present invention provides, by the electrical leakage voltage of test rapier (3) the detection electrical equipment in leakage alarm, and by the voltage transmission that detects to voltage detecting circuit (2), loudspeaker (BL) is driven to send alarm voice to make voltage detecting circuit (2), achieve and carry out leakage-current alarm when electrical equipment leaks electricity, achieve in time and comparatively accurately leakage-current alarm, leak current fault is processed in time, substantially increases the security of operation.
The structural representation of the leakage alarm shown in composition graphs 1 is the circuit diagram of a kind of leakage alarm that the embodiment of the present invention provides see Fig. 2, Fig. 2.Voltage detecting circuit in this leakage alarm comprises: voltage detecting electronic circuit, supplied for electronic circuit.
(a) voltage detecting electronic circuit, wherein, after connecting with one end of current limliting divider resistance (R1) in one end of current limliting divider resistance (R2), the base stage of the other end connecting triode (VT1) of current limliting divider resistance (R2), the other end connecting test rapier (3) of current limliting divider resistance (R1); After coupling capacitance (C1) is in parallel with current limliting divider resistance (R3), one end of this parallel circuit connects ground connection rapier (4), the base stage of the other end connecting triode (VT1) of this parallel circuit; The base stage of the emitter connecting triode (VT2) of triode (VT1), the collector of triode (VT1) connects the power supply positive pole of voice module (IC1), the collector of the power supply negative pole connecting triode (VT2) of voice module (IC1), the emitter of triode (VT2) connects ground connection rapier (4); The output terminal of voice module (IC1) connects loudspeaker (BL).
Particularly; current limliting divider resistance (R1) and current limliting divider resistance (R2) are for carrying out current limliting dividing potential drop to the electric leakage signal detected; the base current of triode (VT1) is made to be unlikely to too high; prevent from triode (VT1) from generating heat even to burn, play the effect of protection triode (VT1).Be used in parallel with current limliting divider resistance (R3) of coupling capacitance (C1) carries out filtering to the electric leakage signal detected, makes measurement more accurate.The connection of triode (VT1) and triode (VT2) is used for the base current of triode (VT1) to amplify, when making triode (VT1) base current very little, the electric current flowing through voice module (IC1) just can be enough large, namely improve the sensitivity of leakage alarm, can realize when electrical leakage voltage is very little reporting to the police.When flowing through the electric current of voice module (IC1) more than 10 MAHs, voice module (IC1) can normally work, and drives loudspeaker (BL) sounding alarm.
(b) supplied for electronic circuit, wherein, the power supply positive pole of voice module (IC1) also connects one end of filter capacitor (C2), and the other end of filter capacitor (C2) connects ground connection rapier (4); One end of filter capacitor (C2) also connects the output terminal of voltage stabilizer (IC2), the earth terminal of voltage stabilizer (IC2) connects ground connection rapier (4), the input end of voltage stabilizer (IC2) connects one end of filter capacitor (C3), and the other end of filter capacitor (C3) connects ground connection rapier (4); One end of filter capacitor (C3) also connects the negative pole of commutation diode (D1) and the negative pole of commutation diode (D3), the positive pole of commutation diode (D1) connects the negative pole of commutation diode (D2), the positive pole of commutation diode (D3) connects the negative pole of commutation diode (D4), and the positive pole of commutation diode (D2) is connected ground connection rapier (4) with the positive pole of commutation diode (D4); A pin of the positive pole of commutation diode (D1) the also output terminal of connection transformer (T), another pin of the output terminal of the positive pole connection transformer (T) of commutation diode (D3); A pin of the input end of transformer (T) connects power switch (K), one end of power switch (K) connecting power line plug (5), the other end of another pin connecting power line plug (5) of the input end of transformer (T).
Particularly, when circuit real work, AC signal will input from the input end of transformer (T), step-down is realized via transformer (T), wherein, the input end of transformer (T) refers to two pins that the armature winding of transformer (T) is drawn, and the output terminal of transformer (T) refers to two pins that the secondary winding of transformer (T) is drawn.The coil turn of this armature winding is greater than the coil turn of this secondary winding, and input voltage and the ratio of output voltage of transformer (T) equal the ratio of this first winding and the coil turn of secondary winding.Such as, in embodiments of the present invention, transformer (T) is 220 volts of wattage transformers turning 12 volts, and therefore, this armature winding is 220/12 with the ratio of the coil turn of secondary winding.The rectification circuit that commutation diode (D1), commutation diode (D2), commutation diode (D3) and commutation diode (D4) form, for being converted to direct current by exchanging, could provide direct supply for voltage detecting circuit.Voltage stabilizer (IC2) carries out voltage stabilizing for the direct current changed by rectification circuit, for providing the direct supply of voltage stabilization for voltage detecting circuit, enables voltage detecting circuit reliably measure electric leakage signal and warning.Filter capacitor (C2) and filter capacitor (C3) are for carrying out filtering to direct supply.
Before beginning detection of electrical leakage, need first to carry out circuit and connect.During concrete enforcement, first will test rapier (3) and do good connection with uncharged electrical equipment metal shell, test rapier (3) can be connected by wire with electrical equipment metal shell; Ground connection rapier (4) is connected with the earth terminal of electrical equipment; The AC power of power-line plug (5) with 220 volts is connected; After above-mentioned connection all completes, by the close position for power switch (K), thus it is transformer (T) power supply.
After carrying out circuit connection, namely power pack starts working.At power pack, the alternating voltage of 220 volts is reduced the alternating voltage for 12V by transformer (T), and its output terminal exports the alternating voltage of 12 volts; This alternating voltage of 12 volts carries out rectification by commutation diode (D1), commutation diode (D2), commutation diode (D3) and commutation diode (D4), exports the DC voltage of 12 volts; This DC voltage of 12 volts carries out filtering and voltage stabilizing by filter capacitor (C3), voltage stabilizer (IC2) and filter capacitor (C2), 6 volts of DC voltage of stable output, thus using the direct voltage source of these 6 volts of DC voltage as current detection section.
After 6 volts of DC voltage that current detection section acquisition power pack provides, voltage detecting work can be started.Particularly, in current detection section, when carrying out detection of electrical leakage, there are following two kinds of situations:
(1) when electrical equipment metal shell is not charged, because test rapier (3) can't detect electrical leakage voltage, triode (VT1) and triode (VT2) do not enter duty, voice module (IC1) does not have electric current to pass through, therefore voice module (IC1) does not work, loudspeaker (BL) not sounding.
(2) when electrical equipment metal shell is charged, electrical leakage voltage signal is gathered by test rapier (3), by series connection current limliting divider resistance (R1) and current limliting divider resistance (R2) electrical leakage voltage is decayed, with current limliting divider resistance (R3), filtering is carried out to electrical leakage voltage by the coupling capacitance (C1) of parallel connection, obtain decay and filtered voltage signal to be measured; This voltage signal to be measured drives triode (VT1) and triode (VT2) to enter duty, the base current of triode (VT1) can amplify by this triode (VT1) and triode (VT2), electric current after being amplified, electric current after this amplification is used for for voice module (IC1) power supply, voice module (IC1) is worked, now loudspeaker (BL) sounding alarm.
Particularly, when metal shell voltage-to-ground is more than or equal to 10 volts, the electric current of triode (VT1) base current after amplifying can reach 10 milliamperes, now voice module (IC1) can work, loudspeaker (BL) will sounding alarm, reaches the effect of leakage-current alarm.In addition, before leak current fault is not removed, voice module (IC1) is by continuous firing, and loudspeaker (BL) continues to send alarm voice.Wherein, these alarm voice can be after prerecording, be stored in the alarm voice in voice module (IC1), the content of these alarm voice can be used in pointing out the people of electrical equipment operation personnel or other contact electrical equipments to leak electricity information, such as " equipment leakage; Danger! Keep Away " etc.
The method that the embodiment of the present invention provides, the voltage of electrical equipment metal shell is detected by test rapier (3), when metal shell voltage-to-ground is more than or equal to 10 volts, make the voice module in voltage detecting circuit (IC1) in running order, thus make loudspeaker (BL) send alarm voice, realize leakage-current alarm, be connected reliably because test rapier and electrical equipment metal shell achieve to fix, voltage detecting circuit achieves in time and leakage-current alarm comparatively accurately, leak current fault is processed in time, substantially increase the security of operation.
It should be noted that: the leakage alarm that above-described embodiment provides is when leakage-current alarm, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, inner structure by equipment is divided into different functional modules, to complete all or part of function described above.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a leakage alarm, is characterized in that, described leakage alarm comprises:
Insulation crust (1),
Be built in the voltage detecting circuit (2) in described insulation crust (1),
Be placed on the test rapier (3) of described insulation crust (1), ground connection rapier (4), power-line plug (5), power switch (K) and loudspeaker (BL);
Wherein, described test rapier (3), described ground connection rapier (4), described power-line plug (5), described power switch (K) are all connected with described voltage detecting circuit (2) with described loudspeaker (BL).
2. leakage alarm according to claim 1, is characterized in that, described voltage detecting circuit (2), comprising:
Current limliting divider resistance (R1), current limliting divider resistance (R2), current limliting divider resistance (R3), coupling capacitance (C1), triode (VT1), triode (VT2), voice module (IC1), filter capacitor (C2), filter capacitor (C3), voltage stabilizer (IC2), commutation diode (D1), commutation diode (D2), commutation diode (D3), commutation diode (D4), transformer (T).
3. leakage alarm according to claim 2, is characterized in that,
After connecting with one end of described current limliting divider resistance (R1) in one end of described current limliting divider resistance (R2), the other end of described current limliting divider resistance (R2) connects the base stage of described triode (VT1), and the other end of described current limliting divider resistance (R1) connects described test rapier (3);
After described coupling capacitance (C1) is in parallel with current limliting divider resistance (R3), one end of this parallel circuit connects described ground connection rapier (4), and the other end of this parallel circuit connects the base stage of described triode (VT1);
The emitter of described triode (VT1) connects the base stage of described triode (VT2), the collector of described triode (VT1) connects the power supply positive pole of described voice module (IC1), the power supply negative pole of described voice module (IC1) connects the collector of described triode (VT2), and the emitter of described triode (VT2) connects described ground connection rapier (4);
The power supply positive pole of described voice module (IC1) also connects one end of described filter capacitor (C2), and the other end of described filter capacitor (C2) connects described ground connection rapier (4);
The output terminal of described voice module (IC1) connects described loudspeaker (BL);
One end of described filter capacitor (C2) also connects the output terminal of described voltage stabilizer (IC2), the earth terminal of described voltage stabilizer (IC2) connects described ground connection rapier (4), the input end of described voltage stabilizer (IC2) connects one end of described filter capacitor (C3), and the other end of described filter capacitor (C3) connects described ground connection rapier (4);
One end of described filter capacitor (C3) also connects the negative pole of described commutation diode (D1) and the negative pole of described commutation diode (D3), the positive pole of described commutation diode (D1) connects the negative pole of described commutation diode (D2), the positive pole of described commutation diode (D3) connects the negative pole of described commutation diode (D4), and the positive pole of described commutation diode (D2) is connected described ground connection rapier (4) with the positive pole of described commutation diode (D4);
The positive pole of described commutation diode (D1) also connects a pin of the output terminal of described transformer (T), and the positive pole of described commutation diode (D3) connects another pin of the output terminal of described transformer (T);
A pin of the input end of described transformer (T) connects described power switch (K), described power switch (K) connects one end of described power-line plug (5), and another pin of the input end of described transformer (T) connects the other end of described power-line plug (5).
4. leakage alarm according to claim 1, is characterized in that, described insulation crust (1) is plastic casing.
5. leakage alarm according to claim 1, is characterized in that, described test rapier (3), described ground connection rapier (4) are the conductive metal sheet that thickness is 2 millimeters.
6. leakage alarm according to claim 1, it is characterized in that, described power-line plug (5) comprises power firestreak (L) and zero-power line (N), described power firestreak and described zero-power line are the wire that sectional area is 1.5 square millimeters, and described wire comprises multiply flexible circuit conductor.
7. leakage alarm according to claim 1, is characterized in that, described power switch (K) is small-sized toggle switch.
8. leakage alarm according to claim 1, is characterized in that, described loudspeaker (BL) is Microspeaker.
9. leakage alarm according to claim 2, is characterized in that,
Described current limliting divider resistance (R1), described current limliting divider resistance (R2) and described current limliting divider resistance (R3) are the resistance of 470 kilo-ohms;
Described coupling capacitance (C1) is the electric capacity of 1000 pico farads, and described filter capacitor (C2) is the electric capacity of 100 microfarads, and described filter capacitor (C3) is the electric capacity of 470 microfarads;
Described triode (VT1) is 9014 type triodes, and described triode (VT2) is 9013 type triodes;
Described commutation diode (D1), described commutation diode (D2), described commutation diode (D3) and described commutation diode (D4) are IN4148 type diode.
10. leakage alarm according to claim 9, is characterized in that,
Described voice module (IC1) is ISD sequence of speech module;
Described voltage stabilizer (IC2) is 7806 type voltage stabilizers;
Described transformer (T) is 220 volts of wattage transformers turning 12 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596435.2U CN204116521U (en) | 2014-10-15 | 2014-10-15 | Leakage alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596435.2U CN204116521U (en) | 2014-10-15 | 2014-10-15 | Leakage alarm |
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| CN204116521U true CN204116521U (en) | 2015-01-21 |
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| CN201420596435.2U Expired - Fee Related CN204116521U (en) | 2014-10-15 | 2014-10-15 | Leakage alarm |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356385A (en) * | 2015-11-25 | 2016-02-24 | 国家电网公司 | Safety wire clamp for distribution line maintenance |
| CN106053924A (en) * | 2016-07-14 | 2016-10-26 | 内蒙古包钢钢联股份有限公司 | Electrician work safety protection system |
| CN109959834A (en) * | 2017-12-14 | 2019-07-02 | 中国石油天然气股份有限公司 | Earth detector |
| CN112834951A (en) * | 2020-09-07 | 2021-05-25 | 青岛经济技术开发区海尔热水器有限公司 | Electric leakage detection circuit, electric leakage protection circuit and household appliance |
-
2014
- 2014-10-15 CN CN201420596435.2U patent/CN204116521U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356385A (en) * | 2015-11-25 | 2016-02-24 | 国家电网公司 | Safety wire clamp for distribution line maintenance |
| CN106053924A (en) * | 2016-07-14 | 2016-10-26 | 内蒙古包钢钢联股份有限公司 | Electrician work safety protection system |
| CN109959834A (en) * | 2017-12-14 | 2019-07-02 | 中国石油天然气股份有限公司 | Earth detector |
| CN112834951A (en) * | 2020-09-07 | 2021-05-25 | 青岛经济技术开发区海尔热水器有限公司 | Electric leakage detection circuit, electric leakage protection circuit and household appliance |
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